Effect of microwave irradiation on the structural, chemical, and hydrophilicity characteristics of ordered mesoporous silica SBA-15

被引：1

作者：

Marília R. Oliveira

Monique Deon

Edilson V. Benvenutti

Vinicius A. Barros

Darley C. de Melo

Elton Franceschi

Silvia M. Egues

Juliana F. De Conto

机构：

[1] Center for Studies in Colloidal Systems (NUESC)/Institute of Technology and Research (ITP),Laboratory of Materials Synthesis and Chromatography (LSINCROM)

[2] Tiradentes University (UNIT),Postgraduate Program in Process Engineering (PEP)/Postgraduate Program in Industrial Biotechnology (PBI)

[3] Federal University of Rio Grande do Sul (UFRGS),Laboratory of Solids and Surfaces (LSS)/Institute of Chemistry

[4] Leopoldo Américo Miguez de Mello Research and Development Center (CENPES)/Petróleo Brasileiro S/A (PETROBRAS),undefined

来源：

Journal of Sol-Gel Science and Technology | 2020年 / 94卷

关键词：

Mesoporous silica; Microwave irradiation; Silanol; Hydrophilic SBA-15;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Structural, chemical, morphological, and hydrophilic surface characteristics of SBA-15 silica synthesized by hydrothermal method in an autoclave and in a microwave-heated reactor were analyzed in this work. The influence of time and temperature on these characteristics was investigated. Materials were characterized by textural analysis (BET), FTIR, TGA, XRD, goniometer contact angle, SEM, and TEM. It was possible to obtain SBA-15 silicas assisted by microwave heating irradiation with short-time synthesis (0.5–8 h) compared with the hydrothermal classic method (24 h). Materials presented surface area between 650 and 850 m2 g−1. Through the XRD and TEM results, it was observed that mesostructured materials with two-dimensional, long-range, and hexagonal ordered channels are characteristic of SBA-15. This study showed that heating by microwave irradiation during silica synthesis generates materials with a greater amount of silanol groups. It is possible to control the surface properties of SBA-15 during the microwave-assisted synthesis through temperature tuning. Higher temperature provided SBA-15 with higher hydrophilicity.

引用

页码：708 / 718

页数：10

共 246 条

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