Bi-functional adsorption-photocatalysis activity of Ag2S-MgO/S-doped biochar heterojunction for cationic dye removal

被引：3
|
作者：
Zheng, Xiaogang [1 ]
Shen, Yue [1 ]
Li, Bo [2 ]
Zhou, Yuanliang [2 ,3 ]
Zheng, Weixin [2 ]
Dong, Jinmei [2 ]
Chang, Chenggong [2 ]
Wen, Jing [2 ]
机构：
[1] Neijiang Normal Univ, Coll Chem & Chem Engn, Neijiang 641100, Sichuan, Peoples R China
[2] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sal, Qinghai Prov Key Lab Salt Lake Resources Chem, Xining 810008, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2023年 / 833卷
关键词：
MgO; S-doped biochar; Adsorption-photocatalysis; Ag2S;
D O I：
10.1016/j.cplett.2023.140908
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：
S-doped biochar was co-modified with Ag2S and MgO (Ag2S-MgO/S-BC) for enhancing adsorption-photocatalytic performance in RhB elimination. The prepared Ag2S-MgO/S-BC heterojunctions were better for adsorption-photocatalytic removal of RhB as compared to Ag2S and MgO alone for S-doped biochar modifying. Langmuir and second-order models well described the adsorption isotherms and kinetics of Ag2S-MgO/S-BC, respectively. The adsorption-photocatalytic elimination of RhB over optimal 4-Ag2S-MgO/S-BC was reached to 97.60 % under solar-light irradiation within 120 min, and the photo-corrosion resulted the declined removal efficiency of RhB to 91.87 % after five cycle times. Ag2S-MgO/S-BC was thus the super candidate for adsorption and photocatalytic application in wastewater treatment.
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页数：8
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