太阳光催化木质素制备银纳米颗粒

doi:10.3969/j.issn.0253-2417.2019.04.005

林产化学与工业 ›› 2019, Vol. 39 ›› Issue (4): 35-41.doi: 10.3969/j.issn.0253-2417.2019.04.005

太阳光催化木质素制备银纳米颗粒

张清桐^1,²,运晓静^1,²,颜德鹏^1,²,李明富^1,²,王双飞^1,²,闵斗勇^1,^2,*()

1. 广西大学轻工与食品工程学院, 广西南宁 530004
2. 广西清洁化制浆造纸与污染控制重点实验室, 广西南宁 530004

收稿日期:2019-04-09 出版日期:2019-08-25 发布日期:2019-08-23
通讯作者: 闵斗勇 E-mail:mindouyong@gxu.edu.cn
作者简介:张清桐(1992-),男,山东泰安人,博士生,研究方向为木质素功能化研究与应用
基金资助:
中国博士后基金资助项目(2015M570419);广西自然科学基金资助项目(2018JJA130224);广西清洁化制浆与污染控制重点实验室基金资助项目(ZR201805-7)

Preparation of Sliver Nanoparticles by Lignin Under Solar Light Irradiation

Qingtong ZHANG^1,²,Xiaojing YUN^1,²,Depeng YAN^1,²,Mingfu LI^1,²,Shuangfei WANG^1,²,Douyong MIN^1,^2,*()

1. College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
2. Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, China

Received:2019-04-09 Online:2019-08-25 Published:2019-08-23
Contact: Douyong MIN E-mail:mindouyong@gxu.edu.cn
Supported by:
中国博士后基金资助项目(2015M570419);广西自然科学基金资助项目(2018JJA130224);广西清洁化制浆与污染控制重点实验室基金资助项目(ZR201805-7)

摘要/Abstract

摘要：

以蔗渣制浆黑液木质素为原料，制备出可稳定分散在水溶液中的木质素纳米颗粒，再以木质素纳米颗粒为还原剂和稳定剂，在太阳光的催化下，将Ag⁺还原成形貌、粒径均一的银纳米颗粒（AgNPs）。研究显示：AgNPs最佳制备工艺为AgNO₃浓度25 mmol/L、木质素纳米颗粒悬浮液质量浓度100 g/L、光照时间10 min，光照强度（900±100）W/m²，此条件下制备的AgNPs直径为15.3 nm。高分辨透射电子显微镜（HRTEM）及元素面分布等结果表明AgNPs被木质素包裹着，木质素上的电负性基团赋予AgNPs表面丰富的负电荷，其Zeta电位为-24 mV，由于双电层的排斥作用，阻碍了AgNPs的聚沉，使得AgNPs能够在水溶液中稳定存在。

关键词: 木质素纳米颗粒, 银纳米颗粒, 太阳光, 催化

Abstract:

Bagasse Kraft black liquor lignin was used as raw material to prepare lignin nanoparticles(LNPs) which was stably dispersed in water. Then, LNPs were used as reductant and stabilizer to reduce Ag⁺ into Ag nanoparticles(AgNPs) under ambient solar light irradiation. The optimal reaction conditions for the synthesis of AgNPs were the concentration of AgNO₃:25 mmol/L, the mass concentration of LNPs suspension:100 g/L, and the solar light irradiation time of 10 min with the solar intensity of (900±100) W/m². Under the optimal conditions, the average size of the synthesized AgNPs was 15.3 nm. HRTEM and element mapping analysis showed that the synthesized AgNPs were entangled by lignin. The electronegative groups of lignin provided AgNPs an abundant negative surface charge with the Zata potential of -24 mV.The electronic doubly layer repulsion hindered the aggregation of AgNPs and stabilized AgNPs in water.

Key words: lignin nanoparticles, sliver nanoparticles, solar, catalysis

中图分类号:

TQ35
TS79

张清桐,运晓静,颜德鹏,李明富,王双飞,闵斗勇. 太阳光催化木质素制备银纳米颗粒[J]. 林产化学与工业, 2019, 39(4): 35-41.

Qingtong ZHANG,Xiaojing YUN,Depeng YAN,Mingfu LI,Shuangfei WANG,Douyong MIN. Preparation of Sliver Nanoparticles by Lignin Under Solar Light Irradiation[J]. Chemistry and Industry of Forest Products, 2019, 39(4): 35-41.

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太阳光催化木质素制备银纳米颗粒

Preparation of Sliver Nanoparticles by Lignin Under Solar Light Irradiation

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