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Chemistry and Industry of Forest Products ›› 2022, Vol. 42 ›› Issue (1): 64-70.doi: 10.3969/j.issn.0253-2417.2022.01.009

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Preparation and Characterization of Hollow Mesoporous Silica Microspheres

Xiaolin HUANG, Jiaxin NI, Youqi HAN, Jiaheng LIU, Yuanyuan MIAO, Shiyan HAN()   

  1. Key Laboratory of Bio-Based Material Science and Technology, Ministry of Education; Northeast Forestry University, Harbin 150040, China
  • Received:2020-12-24 Online:2022-02-28 Published:2022-03-11
  • Contact: Shiyan HAN E-mail:hanshiyan80@163.com

Abstract:

Hollow mesoporous silica microspheres SiO2-1 and SiO2-2 were prepared by sol-gel and hydrothermal synthesis using dichloride-N, N'-bis (3-hydrorosin loxy-2-hydroxypropyl) tetramethylenediamine (DHRT) as template agent and ethyl orthosilicate as silicon source.SEM, TEM, FT-IR, XRD and nitrogen adsorption-desorption were used to characterize SiO2-1 and SiO2-2.The results showed that silicon dioxide microspheres with amorphous structure were successfully prepared by both methods; the agglomeration phenomenon between silica particles gradually disappeared with the increase of the amount of template agent (0.1-1 g); SiO2-1 was mainly loose microsphere with patterns, and SiO2-2 was hollow microsphere with the wall thickness of 80-85 nm.The average particle size distributions of SiO2-1 and SiO2-2 prepared with different template dosages (0.3-1 g) were 0.22-0.33 μm and 0.34-0.41 μm, respectively.The morphology and particle size of SiO2-1-0.7 and SiO2-2-0.7 prepared by two methods exhibited good morphology and low particle size, with specific surface area of 561.52 and 463.41 m2/g, cumulative pore volume of 0.35 and 0.42 m3/g, and average pore size of 2.56 and 3.66 nm, respectively.Zeta potential analysis showed that the formation of SiO2 hollow mesoporous structure was mainly caused by the cooperative self-assembly process between the oligomer obtained by hydrolyzing polycondensation of ethyl orthosilicate and the template agent.

Key words: silica, microspheres, mesoporous, hollow

CLC Number: