Chitosan-based recyclable composite aerogels for the photocatalytic degradation of rhodamine B

被引：36

作者：

Chen, Jiajia ^{[1
]}

Li, Hao ^{[1
]}

Ma, Lulu ^{[2
]}

Jiang, Guoxia ^{[1
]}

Li, Dan ^{[1
,3
]}

Wu, Yang ^{[1
]}

Shi, Xiaowen ^{[1
]}

Li, Dan ^{[1
,3
]}

Wang, Xu ^{[1
]}

Deng, Hongbing ^{[1
]}

机构：

[1] Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bi, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China

[2] Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China

[3] Three Gorges Base Dev Co Ltd, Yichang 443002, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2021年 / 273卷

基金：

中国国家自然科学基金;

关键词：

Oriented lamellar structure; Unidirectional freeze-casting method; Photocatalytic degradation; Multi-walled carbon nanotubes; Rectorite; HYBRID AEROGELS; REMOVAL;

D O I：

10.1016/j.carbpol.2021.118559

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

TiO2 based photocatalyst with sufficient reusability for the degradation of water pollutants remains a challenge. Here, we report a composite chitosan-based aerogel containing TiO2 nanoparticles, multiwalled carbon nanotubes and layered silicate rectorite with sufficient mechanical strength for Rhodamine B degradation. The aerogels with homogeneous oriented lamellar structure were successfully prepared via a unidirectional freezecasting technique. As-prepared aerogels showed specific surface area of 84.59 m2/g. The addition of rectorite and carbon nanotubes accelerated the photodegradation and rectorite significantly enhanced the overall mechanical performance. Rapid degradation of rhodamine B (95% in 100 min) was observed on aerogels with 2 wt % and 4 wt% of rectorite. After 3 cycles, 75% degradation of Rhodamine B was achieved with CTCR4, confirming its reusability. Thus, the composite chitosan aerogels show high photocatalytic degradation efficiency towards Rhodamine B during cycle use.

引用

页数：7

共 27 条

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