Table of Content

25 June 2018, Volume 38 Issue 3 Previous Issue    Next Issue

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Research Advances in Preparation of Furfural and Its Derivatives by Selective Catalytic Conversion of Hemicellulose LU Yi, ZHENG Zhifeng, HUANG Yuanbo, LI Wenbin 2018, 38 (3):  1-16.  doi: 10.3969/j.issn.0253-2417.2018.03.001 Abstract ( 661 )   PDF (795KB) ( 1415 )   Save The utilization of renewable biomass resources play an important role in solving the energy crisis and reducing environmental pollution. Along this background, the production of furan-based chemicals from lignocellulose becomes one of the research focuses in biorefinery. Furfural is the key furan-based building block, which is manufactured from hemicellulose fraction directly, and offers a promising, rich platform for lignocellulosic biofuels and value-added chemicals. So it is of great practical significance to develop green technologies for the production of furfural and the conversion of furfural to primary furan-based chemicals. In this review, the formation routes and catalytic conversion of hemicellulose into furfural were summarized with special attentions on the heterogeneous acid-catalysts for the production of furfural in the liquid phase, including zeolites, metal oxides, ion-exchange resins, clays and carbon materials. The formation routes and technologies starting from furfural to various furan-based chemicals, including furfuryl alcohol, tetrahydrofurfuryl alcohol, 2-methylfuran, 2-methyltetrahydrofuran, furan, tetrahydrofuran, were reviewed. References | Related Articles | Metrics

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Research Progress of Biological Activity of Rosin Derivatives LI Zhaoshuang, LI Jianfang, LIU He, SHANG Shibin, SONG Zhanqian 2018, 38 (3):  17-24.  doi: 10.3969/j.issn.0253-2417.2018.03.002 Abstract ( 773 )   PDF (559KB) ( 824 )   Save In our country, rosin is an important natural renewable resource which has been widely used in various fields. A series of bioactive rosin-based derivatives with unique substituents and functional groups can be prepared through the reaction of carboxyl group and hydrogenated phenanthrene ring. The derivatives are widely used in antimicrobial, anti-virus, anti-tumor, weeding, insecticide and other fields. In this paper, the related researches on the bioactivity of rosin derivatives were reviewed and summarized. New research ideas on the biological activity of the rosin-based derivatives were prospected. References | Related Articles | Metrics

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Drug Release and Kinetics Properties of Rosin-based Polyacrylamide Hydrogels ZHANG Haibo, JIANG Jianxin, GAO Hong, SHANG Shibin, SONG Zhanqian 2018, 38 (3):  25-32.  doi: 10.3969/j.issn.0253-2417.2018.03.003 Abstract ( 635 )   PDF (781KB) ( 792 )   Save Diclofenac sodium, ciprofloxacin and theophylline were used as model drugs to study the drug release properties and kinetics of rosin-based polyacrylamide hydrogels. The results indicated that the equilibrium swelling ratios of hydrogels decreased with the increase of the amount of rosin-based cross-linking agent FPA-PEG200-AC. And the equilibrium swelling ratio was largest(12 g/g) in the pH 7.4 PBS buffer solution, followed by the deionized water and it was the smallest in the pH 1.4 hydrochloric acid solution. The drug release properties of hydrogels prepared with different amounts of cross-linking agent showed that the diclofenac sodium was mainly released within 1 h, and reached the maximum values of cumulative release within 3 h. The ciprofloxacin was released slowly and reached the maximum values of cumulative release within 8 h; when the amount of FPA-PEG200-AC was 0.025 g/mL in hydrogel, the maximum values of cumulative release was about 99.7%. The maximum values of theophylline release in pH 7.4 PBS buffer could reach 99%, which was higher than the cumulative release rate in pH 1.4 hydrochloric acid solution. The drug release data of hydrogels were fitted into Higuchi models (r2=0.873-0.999) and Korsmeyer-Peppas models (r2=0.887-0.999, the diffusional exponent n< 0.5, Fick diffusion); the drug release of hydrogels was best explained by Higuchi models when the dosage of FPA-PEG200-AC was 0.020 and 0.030 g/mL. References | Related Articles | Metrics

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Preparation,Characterization and Gaseous Benzene Adsorption Performance of Mo-loaded Activated Carbon TONG Guobin, XU Zhou, LI Wei, LIU Shouxin 2018, 38 (3):  33-40.  doi: 10.3969/j.issn.0253-2417.2018.03.004 Abstract ( 651 )   PDF (2116KB) ( 738 )   Save Mo-loaded activated carbon materials (Mo/AC) with high adsorption performance for gaseous benzene were prepared by modification of coconut shell based activated carbon with ammonium molybdate tetrahydrate aqueous solution. The modified activated carbons were labeled as AC-1, AC-2, AC-3, and AC-4 to represent molybdenum salt solutions with the mass fractions of 0.1%, 0.3%, 0.5%, and 0.7%, respectively. Mo/AC was characterized by means of nitrogen adsorption isotherm, SEM, XRD, and XPS. Dynamic studies of gaseous benzene adsorption at room temperature were carried out. The results showed that element molybdenum existed on the surface of activated carbon in the form of MoO3. Specific surface area and total pore volume of the modified activated carbon were improved after modification, among them, those of AC-2 were the largest with the values of 1 372.12 m2/g and 0.74 cm3/g respectively, but the average pore size did not change much and remained at about 2.16 nm. Ether and carboxyl groups on the surface of activated carbon decreased obviously. With the increase of impregnation mass fractions of molybdenum salt, the adsorption capacity of gaseous benzene increased, but it showed degradation when the mass fractions exceeded 0.3%. As the mass fractions of (NH4)6Mo7O24·4H2O was 0.3%, the modified activated carbon AC-2 had the most excellent adsorption capacity with the equilibrium adsorption capacity of 332.80 mg/g, which increased by 24.55% compared to that of the original one (267.20 mg/g), and the theoretical adsorption time was as high as 110.93 min, which was 24.54% higher than that of the original carbon. After 5 cycles of adsorption, the equilibrium adsorption capacity of AC-2 still reached 306.99 mg/g, and the theoretical adsorption time was 101.27 min. References | Related Articles | Metrics

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Preparation of Hydroxyethyl Cellulose/Poly(Acrylic Acid) Composite Hydrogels with High Mechanical Strength ZHENG Kun, NIU Li, LIU Yupeng, CHEN Ying, WANG Chunpeng, CHU Fuxiang 2018, 38 (3):  41-47.  doi: 10.3969/j.issn.0253-2417.2018.03.005 Abstract ( 863 )   PDF (1006KB) ( 841 )   Save A new kind of elastic hydroxyethyl cellulose/poly(acrylic acid) (HEC/PAA) composite hydrogels was synthesized via free radical polymerization of acrylic acid(AA) with hydroxyethyl cellulose that played the role as a cross-linkers via hydrogen bonding interaction. The prepared composite hydrogels were labeled as HEC/PAA-1-HEC/PAA-5, according to the HEC mass fractions (hydrogel solid content) were 20.0%, 33.3%, 42.9%, 50.0%, 55.5%. The properties and structure of these hydrogels were then investigated by the mechanical testing and Fourier-transform infrared spectroscopy(FT-IR). The mechanical testing showed that the compressive stress of HEC/PAA-2 composite hydrogels could reach 9.52 MPa with the strain of about 91% without a break and the compression fracture energy reached 513.6 kJ/m3. Meanwhile, HEC/PAA hybrid hydrogels exhibited excellent tensile properties and excellent recoverable performance. The tensile fracture strength of HEC/PAA-4 was 224.3 kPa, which was associated with 198% elongation at break and the tensile fracture energy of 219.5 kJ/m3. When HEC/PAA-2 swelled for 150 h, the swelling rate of water was 2.23 g/g. The mechanical test, FT-IR analysis and swelling properties tests results showed that the hydrogen bonds between the PAA chains and HEC chains formed a special network structure and thus resulted in the good mechanical properties of composite hydrogels. References | Related Articles | Metrics

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Directional Liquefaction of Bamboo Catalyzed by Cu Doped Porous Metal Oxide YE Jiewang, JIANG Jianchun, MA Zhongqing, ZHANG Weigang, LU Fengzhu 2018, 38 (3):  48-54.  doi: 10.3969/j.issn.0253-2417.2018.03.006 Abstract ( 616 )   PDF (696KB) ( 650 )   Save Cu doped porous metal oxide (PMO) catalysts were prepared using hydrotalcite-like compound as precursors. The synthesized catalysts were characterized by ICP, BET and XPS. The ICP analysis showed that metal loaded on the catalysis equated with the experiment design, which indicated that no obvious mass loss of metal ion during the formation and calcinations of hydrotalcite-like compound. BET analysis indicated a higher surface area in the doped PMO than the undoped. Appearance of PMO catalysts changed from green to red after the reaction. XPS studies showed that the color change was accompanied with the reduction of Cu (Ⅱ) to Cu(I)/Cu(0). The effects of reaction parameters on the liquefaction and products composition of bamboo were investigated in supercritical methanol medium. The results showed that under the conditions of 10% Cu0.2Mg0.8Al-LDO, reaction temperature of 280℃, and reaction time of 8 h, the liquefaction rate was 95.7%, the contents of alcohols and ketones in the liquefaction product were 55.7%, and almost no acid was found, indicating that the bamboo was converted to the liquid product mainly composed of small alcohols and ketones after depolymerization and hydrogenation. The amounts of products with low oxygen content such as ketones, alcohols and hydrocarbons increased with the increase of Cu doping levels and more catalysts dosage, while the amount of ester decreased significantly. The supercritical temperature of methanol was a key factor for the composition and distribution of the products. Generally, longer time resulted in higher contents of alcohols, ketones and hydrocarbons. These results supported that Cu doped PMO catalyst was an effective catalyst for both hydrogenolysis and hydrogenation of bamboo by in situ produced H2 from methanol. References | Related Articles | Metrics

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Synthesis of Nitrogen and Oxygen-doped Ligin-based Electrode Materials and Its Electrochemical Performance ZHANG Wen, XU Sheng, LÜ Zongze, LI Zhiguo 2018, 38 (3):  55-62.  doi: 10.3969/j.issn.0253-2417.2018.03.007 Abstract ( 589 )   PDF (1492KB) ( 792 )   Save Nitrogen and oxygen-doped carbon materials (NSL-x) were prepared by one-pot pyrolysis of sodium lignin sulfonate as carbon precursor and melamine as nitrogen precursor. The morphology and structure of obtained materials were characterized by SEM, XRD, XPS analysis. The results showed that NSL-x was composed of irregular carbon block with size ranging from hundreds of nanometers to several microns. Nitrogen doping did not change the morphology and crystalline structure of carbon block, the amorphous carbon structure was the main form of NSL-x. When the mass ratio of melamine and sodium lignin sulfonate was 4, nitrogen and oxygen content of the obtained NSL-4 can reached 2.41% and 20.12%, respectively. Electrochemical performance test results showed that NSL-4 exhibited a high capacitance of 229 F/g at the current density of 0.1 A/g in 6 mol/L KOH electrolyte, and even remained 137 F/g at 20 A/g. Meanwhile, under the current density of 10 A/g, NSL-4 remained 100% coulomb efficiency with only 1% capacity loss after 10 000 consecutive charge/discharge cycles, and showed excellent electrochemical stability. References | Related Articles | Metrics

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Preparation of Ethyl Glycosides and Phenolic Products by Pressurized Liquefaction of Bamboo Biomass MA Yan, TAN Weihong, FENG Guodong, XU Junming, WANG Kui, JIANG Jianchun 2018, 38 (3):  63-68.  doi: 10.3969/j.issn.0253-2417.2018.03.008 Abstract ( 543 )   PDF (1388KB) ( 658 )   Save The liquefaction of bamboo biomass was investigated using ethanol as solvent with H2SO4 as catalyst in a 250 mL autoclave. The effects of different reaction conditions on the bamboo liquefaction were investigated. The results showed that optimum liquefaction conditions were catalyst dosage 5%, reaction temperature 180℃, reaction time 30 min. Under the circumstances, the yield of ethyl glycoside and phenolic products were 39.86% and 20.7%, respectively, with liquefaction ratio of 69.67%. The liquefied mixture was further separated by neutralization and step-wise separation process. Two platform chemicals, ethyl glycosides and phenolic products were obtained. The main compositions of phenolic products identified by GC-MS were 2,6-dimethoxyphenol, 3,5-dimethoxy-4-hydroxyphenylacetic acid, 4-allyl-2,6-dimethoxyphenol, and aspidinol et al, which accounting for 80% of the phenolic products. Five carbon sugars (furan glycosides) and six carbon sugars (glucopyranose and galactopyranoside) were the predominant products in glucosides, which accounting for 88.62% of the glycosides. References | Related Articles | Metrics

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Effect of Screw-extrusion Steam Explosion on the Structure of Rice Straw and the Performance of Binderless Board FENG Yanhong, WANG Duan, XIAO Heping, HE Hezhi, QU Jinping 2018, 38 (3):  69-74.  doi: 10.3969/j.issn.0253-2417.2018.03.009 Abstract ( 581 )   PDF (1049KB) ( 653 )   Save The rice straw (RS) was pretreated by continuous screw-extrusion steam explosion to obtain steam explosion pretreated rice straw for the preparation of binderless board. The pretreated rice straw was washed by distilled water and filtered to obtain washing solution and filter residue (steam explosion pretreated rice straw fiber, SE-RS). The structure and properties were investigated by scanning electron microscopy (SEM), ultraviolet-visible absorption spectrum (UV-Vis), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), components testing and moisture absorption testing respectively. The SEM images show that after pretreatment the surface structure of rice straw was destoried and the fiber bundle was separated to slender fiber and fragment. The UV-Vis, FT-IR and TG analyses showed that the hemicellulose and lignin of RS were degraded during the pretreatment and there was no significant change in the structure of fiber. Comparing to the raw material, the content of benzene-alcohol extract and the ash of SE-RS were decreased by 36.91% and 23.13% respectively; The crystallinity of cellulose was increased by 10.61% and the moisture absorption rate was decreased by 17.02% after washing. Binderless boards were then prepared from rice straw and pretreated rice straw. The modulus of rupture (MOR) and modulus of elasticity (MOE) of the binderless board was increased by 142.02% and 196.78% compared to the control respectively, and the thickness expansion rate of water absorption for 2 h(2 h TS) was only one-third of the control's. References | Related Articles | Metrics

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Simulation and Optimization of Fixed Bed Biomass Gasification Processed by Aspen Plus ZHANG Wei, WU Yongming 2018, 38 (3):  75-82.  doi: 10.3969/j.issn.0253-2417.2018.03.010 Abstract ( 1167 )   PDF (984KB) ( 842 )   Save In order to study the enfulence factors of biomass fixed bed gasification for optimizing gasification process parameters, the kinetic simulation model of biomass gasification process was established by the Aspen Plus simulation system with its associated modules of RCSTR and Ryied reactors. The gasification process parameters, such as gasification temperature, air ratio(AR), water vapor intake(S/B) and biomass moisture content, and their effects on gasification process were analyzed through the kinetic simulation model. Then gasification process parameters were optimized by sensitivity analysis. Considering the above gasification process parameters, the simulation analysis of biomass gasification process was carried out, and the optimization parameters were gasification temperature 800℃, air ratio 0.25, and water vapor intake 2.3. References | Related Articles | Metrics

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Pyrolysis and Kinetic Characteristics of Corn Stalk Char from Hydrothermal Carbonization DONG Xiangyuan, GUO Shuqing, YANG Jitao, GAO Xinjie, WANG Zhezhe, WANG Shuzhong 2018, 38 (3):  83-89.  doi: 10.3969/j.issn.0253-2417.2018.03.011 Abstract ( 756 )   PDF (1384KB) ( 762 )   Save Hydrothermal carbonization experiments were carried out at 180-290℃ for 30-480 min using corn stalk as raw material. The carbon content and pyrolysis characteristics of corn stalk at different reaction conditions were studied. The pyrolysis process and the kinetic parameters of corn stalk and its hydrochar (250℃, 480 min) were investigated using the Friedman method, Flynn-Wall-Ozawa (FWO) method and Kissenger-Akahira-Sunose (KAS) method. The results indicated that the carbon content of corn stalk hydrochar increased with increasing reaction severity. The pyrolysis yield and the maximum reaction rate of the hydrochar decreased gradually, and the pyrolysis temperature range corresponding to the maximum reaction rate varied from 280-380℃ to 400-450℃ with the increase of reaction severity. When the reaction severity was larger than 7.11 (250℃, 480 min), the maximum reaction rate was relatively stable. The thermal decomposition processes of both the corn stalk and its hydrochar could be divided into three stages:dehydration, main pyrolysis and carbonization. The activation energies calculated by both FWO and KAS method were similar. At high conversion stage (greater than 20%), the activation energies of the hydrochars were much higher than that of corn stalk. When the conversion rate was 75%, the activation energies of the hydrochar calculated by FWO and KAS method were 260.87 and 261.84 kJ/mol, respectively, while the activation energies of corn stalk were only 145.55 and 142.74 kJ/mol, respectively. References | Related Articles | Metrics

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Synthesis of Fluorescent Carbon Dots by Oxidation and Its Application LIANG Qian, WANG Guilong, CAI Zhenghan, WANG Xueqin, HUANG Biao 2018, 38 (3):  90-96.  doi: 10.3969/j.issn.0253-2417.2018.03.012 Abstract ( 669 )   PDF (1957KB) ( 616 )   Save Fluorescent carbon dots could be prepared by using pre-carbonized Chinese fir powder as the carbon source though the oxidation method. The obtained carbon dots were characterized by transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy(FT-IR), X-ray photoelectron spectroscopy (XPS) and fluorescence spectroscopy. The results showed that the carbon dots were spherical with the particle size of 1-8 nm, the surface of carbon dots had carboxyl, hydroxy and amino and so on, and the carbon dots had good water solubility and anti-salt property; the carbon dots emitted strong blue fluorescence with the maximum emission wavelength of 455 nm under the excitation band of 335 nm and the quantum yield was 8.3%. The intensity of the fluorescence was sensitive to the pH value. Based on the quenching effect of nitrofurazone on the fluorescence of carbon dots, the quenching experiment was conducted with different concentrations of nitrofurazone. As a result, a sensitive approach was developed for the detection of nitrofurazone in the range of 0.2-100 μmol/L with the detection limit of 70 nmol/L based on the fluorescence resonance energy transfer (FRET) and inner filter effect (IFE) between carbon dots and nitrofurazone with the linear equation of F0/F=0.965+0.015c and linear correlation coefficient of 0.994 6. References | Related Articles | Metrics

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Screening and Optimization of Culture Condition of a Pyrogallol-producing Strain XU Man, WANG Yongmei, ZHANG Liangliang 2018, 38 (3):  97-102.  doi: 10.3969/j.issn.0253-2417.2018.03.013 Abstract ( 538 )   PDF (715KB) ( 643 )   Save Three bacteria strains including Enterobacter spp., Lactobacillus brevis and Lactobacillus plantarum were tested for degrading gallic acid into pyrogallol. The factors affecting the activity of gallate decarboxylase from E. spp. and L. plantarum, including substrate concentration, temperature, pH, magnesium sulfate (MgSO4) concentration were also studied. The experiment results showed that the yield of pyrogallol by E. spp. could reach 58.11% with the temperature 28℃, 30 mmol/L gallic acid, 8 mmol/L (NH4)2SO4, 80 mmol/L MgSO4 and pH 6.0 after cultured for 48 h. Meanwhile, the yield of pyrogallol by L. plantarum could reach 83.31% with the temperature 37℃, substrate concentration 10 mmol/L, concentration of (NH4)2SO4 8 mmol/L, concentration of MgSO4 20 mmol/L and pH 6.5 after cultured for 48 h. References | Related Articles | Metrics

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Synthesis and Antifungal Activity of Ethylene Glycol Mono Hydronopol Ether and Its Carboxylic Ester HUANG Jing, XIAO Zhuanquan, WANG Zongde, FAN Guorong 2018, 38 (3):  103-108.  doi: 10.3969/j.issn.0253-2417.2018.03.014 Abstract ( 653 )   PDF (525KB) ( 662 )   Save Ethylene glycol mono hydronopol ether(compound 2)was prepared from the reaction of hydronopol bromide and ethylene glycol under the alkaline condition provided by sodium hydroxide. And then, five kinds of ethylene glycol mono hydronopol ether carboxylic esters, which were ethylene glycol mono hydronopyl ether ester (3a), ethylene glycol mono hydronopyl ether acetate (3b), ethylene glycol single hydronopyl ether propionate (3c), ethylene glycol mono hydronopyl ether ester of butyric acid (3d), ethylene glycol mono hydronopyl ether n-valeric acid ester (3e), were prepared from the esterification of ethylene glycol mono hydronopol with five carboxylic acids, respectively, and the yields and GC purities of products were all above 90%. Identification and structural analysis were performed by NMR(1H NMR, 13C NMR) and FT-IR. The antifungal activities of all compounds against ten plant pathogenic fungi were studied by measuring the mycelial growth rate. The antifugal activity test showed that at the mass concentration of 500 mg/L, the six compounds had certain antifungal activity against the ten tested plant pathogenic fungi. Among these inhibitory rate data, the inhibition rate of compound 2 on Phomopsis chimonanthi, Glomerella cingulata, Sclerotinia sclerotiorum, Thanatephorus cucumeris, Ceratosphaeria phyllostachydis reached 100%, the inhibition rate of compound 3a on S. sclerotiorum, Botryis phariadothide and Lettuce sclerotinia reached 100%, the inhibition rates of these compounds even exceeded or were equal to chlorothalonil on the same mass concentration. References | Related Articles | Metrics

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Carbamatization of Bio-oil and Its Derived Phenolic Resins ZHANG Haoran, AI Tao, ZHANG Donghui, WEI Junqi 2018, 38 (3):  109-114.  doi: 10.3969/j.issn.0253-2417.2018.03.015 Abstract ( 590 )   PDF (1028KB) ( 620 )   Save The conversion of the bio-oil into carbamate was carried out in accordance with the mass ratio of bio-oil and urea 100:20, 100:30 and 100:50 and achieved the carbamate bio-oil UO-20, UO-30 and UO-50 that were then used to synthesize and the biomass phenolics UOR-20, UOR-30 and UOR-50. The carbamate bio-oil and its derived phenolic resins were characterized, and the cure and thermal properties of the carbamate bio-oil derived phenolic resins were investigated. The results showed that the introduction of amino groups in bio-oil during carbamatization was beneficial for the preparation of biomass phenolics. With the increase of bio-oil amination degree, the softening point and gelation temperature of biomass phenolics reduced; there were two endothermic peaks at 178 and 205℃ during the cure process of biomass phenolics. Meanwhile, the benign rheological property and machine shaping were equipped; the char-yield of biomass phenolics at 800℃ and nitrogen environment could reach to 42%-46%. The thermal decomposition temperature these biomass phenolics could reach to 245-325℃, indicating that these biomass phenolics have a benign heat resistance. References | Related Articles | Metrics

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Photocatalytic Activity of CdS@Polyaniline/Cellulose Fibers Composite YU Mudan, QIAN Xueren, ZHOU Wanpeng 2018, 38 (3):  115-121.  doi: 10.3969/j.issn.0253-2417.2018.03.016 Abstract ( 542 )   PDF (1303KB) ( 700 )   Save After the successful preparation of PANI/CFs by in situ depositing polyaniline (PANI) onto cellulose fibers (CFs), CdS@PANI/CFs composite was then synthesized via using the high absorption of Cd2+ by PANI/CFs. FT-IR, XRD and SEM-EDX were applied to characterize these composites. It was found that the intervention of PANI significantly promoted the in situ deposition of CdS nanoparticles onto CFs. The as-prepared CdS@PANI/CFs composite was used to degrade methylene blue (MB) under visible light radiation. The degradation ratio of MB by CdS@PANI/CFs was about 1.5 times higher than that by CdS@CFs at the same CdS deposition amount, which indicated PANI had a marked enhancement effect on the visible light photocatalytic degradation of MB. The effects of different process variables, such as MB concentration, catalyst dosage and utilization times, on the degradation ratio of MB were investigated. With increasing the MB concentration, the degradation ratio of MB decreased. The degradation ratios(5 h) were 90.37%, 84.15%, 77.35% and 58.53% when MB concentrations were 10, 15, 20 and 30 mg/L, respectively. The optimum dosage of catalyst was 0.4 g when MB concentration was 20 mg/L and volume was 400 mL. CdS@PANI/CFs composite also exhibited a good reusability after three times of utilization(the degradation ratio of MB was 80.36%). References | Related Articles | Metrics

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Adsorption Kinetics of Lycorine and Galanthamine with Molecular Sieve ZSM-5 LIU Yunlong, SONG Ke, XIAO Zhuobing, GUO Jie 2018, 38 (3):  122-128.  doi: 10.3969/j.issn.0253-2417.2018.03.017 Abstract ( 443 )   PDF (598KB) ( 684 )   Save In order to evaluate the adsorption and purification capability of ZSM-5 molecular sieve on the lycorine and galanthamine, the adsorption and desorption performance of the three adsorbents (including ZSM-5 molecular sieve, cation exchange resin, macroporous resin) on the lycorine and galanthamine from Lycoris aurea were investigated, and then the adsorption kinetics were also studied. The results showed that ZSM-5 had obvious advantages in adsorption and elution of lycorine and galanthamine compared with macroporous resin (AB-8 and D-101) and cation adsorption resin (D-001 and HD-8). Adsorption rates of lycorine and galanthamine on ZSM-5 achieved more than 99.5% and the elution rates achieved 90.35% and 84.84%, respectively. The adsorption rates of D-101 and AB-8 were high, but the elution rates were only about 75%. Adsorption rates of lycorine on D-101 and AB-8 were high, but those of galanthamine were only 14.50% and 20.56%. The result of kinetics study indicated that the adsorption of lycorine and galanthamine on ZSM-5 was in good consistent with the second order kinetics model (R2=0.999 9), and chemisorption occupied the leading role. References | Related Articles | Metrics