Effect of framework structure, pore size and surface modification on the adsorption performance of methylene blue and Cu2+ in mesoporous silica

被引：41

作者：

Ge, Shaobing ^{[1
]}

Geng, Wangchang ^{[1
]}

He, Xiaowei ^{[1
]}

Zhao, Jiawei ^{[1
]}

Zhou, Bo ^{[1
]}

Duan, Libing ^{[1
]}

Wu, Yaoguo ^{[1
]}

Zhang, Qiuyu ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Sci, Xian 710072, Shaanxi, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2018年 / 539卷

基金：

中国国家自然科学基金;

关键词：

Pore structure; Adsorption; Mesoporous silica; Cationic dye; Heavy metal ions; HEAVY-METAL IONS; AQUEOUS-SOLUTION; RHODAMINE-B; WASTE-WATER; REMOVAL; ADSORBENT; CU(II); COMPOSITE; KINETICS; SBA-15;

D O I：

10.1016/j.colsurfa.2017.12.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of silica with diverse channel structures or pore diameters were synthesized via the hydrothermal method. Corresponding amine/nitro-modified materials were obtained by grafting, nitrating reaction, respectively. Textural and chemical properties were analyzed by Scanning electron micrograph (SEM), Small angle powder X-ray diffraction (SAXRD), Nitrogen adsorption-desorption measurement, Fourier transform infrared spectroscopy (FTIR), Thermogravimetric (TG) analysis and Zeta potential. Batch adsorption results revealed that distinct uptake capacities of Cu2+ and methylene blue occurred at the solid-liquid interface of prepared adsorbents. Especially, pure SBA-12-OH displayed the highest removal behavior toward methylene blue, mainly owing to its larger pore diameter. Amine-grafted SBA-12 (SBA-12-NH2) presented higher affinity to Cu2+ than others, originating from the complexation function of amine groups and its superior framework structure. Moreover, their adsorption isotherms and kinetics were further investigated to explore the application in industrial operation system.

引用

页码：154 / 162

页数：9

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