SiO2/还原氧化石墨烯复合材料的简易制备及对罗丹明B的吸附

doi:10.16085/j.issn.1000-6613.2017-1219

化工进展 ›› 2018, Vol. 37 ›› Issue (03): 1084-1091.DOI: 10.16085/j.issn.1000-6613.2017-1219

SiO₂/还原氧化石墨烯复合材料的简易制备及对罗丹明B的吸附

曾会会, 仪桂云, 邢宝林, 谌伦建, 张传祥, 张文鸽, 李晓洁, 范海洋

河南理工大学化学化工学院, 河南焦作 454000

收稿日期:2017-06-08 修回日期:2017-08-11 出版日期:2018-03-05 发布日期:2018-03-05
通讯作者: 仪桂云,博士,讲师,研究方向为石墨烯纳米材料的制备及应用。
作者简介:曾会会(1990-),女,硕士研究生,研究方向为洁净煤技术。E-mail:huizeng1991@163.com。
基金资助:
国家自然科学基金（51404098，51174077）、河南省国际科技合作项目（152102410047）、国家级大学生创新创业训练计划（201610460040，201610460044）及河南理工大学博士基金（B2013-015）项目。

Facile synthesis of SiO₂/RGO composite for the adsorption of Rhodamine B

ZENG Huihui, YI Guiyun, XING Baolin, CHEN Lunjian, ZHANG Chuanxiang, ZHANG Wenge, LI Xiaojie, FAN Haiyang

College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China

Received:2017-06-08 Revised:2017-08-11 Online:2018-03-05 Published:2018-03-05

摘要/Abstract

摘要： 以正硅酸乙酯（TEOS）为硅源，氧化石墨烯（GO）为载体，在不添加任何还原剂的情况下，通过水热法简易制备SiO₂/还原氧化石墨烯（SiO₂/RGO）复合材料。采用TEM、FTIR、XRD、TG-DSC、N₂-吸附对复合材料的微观结构进行表征，分析表明：负载量为76.60%（质量分数）的SiO₂纳米颗粒均匀分散在RGO表面上，且部分以Si-O-C键进行配位；具有多级孔结构的SiO₂/RGO复合材料孔径主要分布在1~7nm，比表面积高达676m²/g。以罗丹明B为目标污染物，考察了pH、投入量、温度和接触时间等因素对复合材料吸附性能的影响，结果表明：在pH为2、35℃时，复合材料具有最佳的吸附效果，吸附量为127.8mg/g。动力学分析表明吸附过程符合准二级动力学模型，热力学参数揭示吸附过程为自发吸热过程。

关键词: SiO₂/RGO复合材料, 罗丹明B, 吸附, 动力学, 热力学

Abstract: SiO₂/RGO composite was synthesized without any reductant by hydrothermal method with tetraethyl orthosilicate(TEOS) and GO as the starting raw. The microstructure and physiochemical properties of the SiO₂/RGO composite were characterized by TEM,FTIR,XRD,TG-DSC and N₂-adsorption. The results showed that the SiO₂ nanoparticles were uniformly distributed on the surface of RGO,and some SiO₂ nanoparticles coordinated with RGO via Si-O-C bonds. The optimized composite contained 76.60% SiO₂ and possessed micro-mesoporous structure with pore size distribution of 1-7nm and surface area of 676m²/g. In addition,the influences of pH,dosage,temperature and contact time on the adsorption of Rhodamine B were studied systematically. The highest adsorption capacity reached 127.8mg/g under the optimized conditions(pH of 2 and 35℃). Kinetic analysis showed that the adsorption process could be well described by the second-order law and the process was endothermic.

Key words: SiO₂/RGO composite, Rhodamine B, adsorption, kinetics, thermodynamic

中图分类号:

曾会会, 仪桂云, 邢宝林, 谌伦建, 张传祥, 张文鸽, 李晓洁, 范海洋. SiO₂/还原氧化石墨烯复合材料的简易制备及对罗丹明B的吸附[J]. 化工进展, 2018, 37(03): 1084-1091.

ZENG Huihui, YI Guiyun, XING Baolin, CHEN Lunjian, ZHANG Chuanxiang, ZHANG Wenge, LI Xiaojie, FAN Haiyang. Facile synthesis of SiO₂/RGO composite for the adsorption of Rhodamine B[J]. Chemical Industry and Engineering Progress, 2018, 37(03): 1084-1091.

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SiO₂/还原氧化石墨烯复合材料的简易制备及对罗丹明B的吸附

Facile synthesis of SiO₂/RGO composite for the adsorption of Rhodamine B

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