Photocatalytic degradation of methyl orange by Ag/TiO2/biochar composite catalysts in aqueous solutions

被引：133

作者：

Shan, Rui ^{[1
,2
,3
,4
]}

Lu, Lili ^{[1
,2
,3
]}

Gu, Jing ^{[1
,2
,3
,4
]}

Zhang, Yuyuan ^{[5
]}

Yuan, Haoran ^{[1
,2
,3
,4
]}

Chen, Yong ^{[1
,2
,3
,4
]}

Luo, Bo ^{[6
]}

机构：

[1] Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China

[2] Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China

[3] CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China

[4] Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China

[5] Foshan Univ, Coll Mat Sci & Energy Engn, Foshan 528000, Guangdong, Peoples R China

[6] Chongqing Environm & Sanitat Grp Co Ltd, Chongqing 401121, Peoples R China

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2020年 / 114卷

基金：

国家重点研发计划;

关键词：

Ag; Surface plasmon resonance; Photocatalytic degradation; Methyl orange; TiO2; VISIBLE-LIGHT; ASSISTED SYNTHESIS; TIO2; AG/TIO2; AG; AG-TIO2; NANOCOMPOSITE; NANOPARTICLES; EFFICIENCY; REDUCTION;

D O I：

10.1016/j.mssp.2020.105088

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

One set of biochar-coupled Ag and TiO2 composites were successfully fabricated by mixing, calcination, and photodeposition method to remove methyl orange (MO). It was found that all catalysts modified with Ag showed better photocatalytic degradation performance (the highest decolorization efficiency and mineralization efficiency were 97.48% and 85.38%, respectively) than single TiO2 because of the synergy of Ag, TiO2 and biochar. Characterization results indicated that Ag as well as TiO2 acted as electron donor and biochar acted as electron acceptor, which could effectively promote the separation of photogenerated electron hole pairs. In addition, the catalyst exhibited high stability up to 5 cycles and the loss of activity was negligible. And the catalytic degradation process was consistent with the pseudo-first-order kinetic (PFOK) model with the degradation rate constant of 6.29 x 10(2) min(-1).

引用

页数：12

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