Biochar/α-Fe2O3/γ-Fe2O3 Heterjunction Composite for Photocatalytic Removal of Amino Black

被引：0
|
作者：
Chen, Feng [1 ]
Chen, Xiao [1 ]
Li, Peihe [2 ]
Zhang, Jingwen [2 ]
Li, Wanfei [3 ]
Wang, Gelan [2 ]
Zhou, Haoyu [2 ]
Xie, Youfeng [2 ]
Chen, Zhigang [1 ]
Liu, Chengbao [1 ]
机构：
[1] Suzhou Univ Sci & Technol, Sch Mat Sci & Engn, Jiangsu Key Lab Environm Funct Mat, Suzhou 215009, Peoples R China
[2] Inner Mongolia Minzu Univ, Nano Innovat Inst NII, Tongliao 028000, Peoples R China
[3] Suzhou Univ Sci & Technol, Suzhou Key Lab Nanophoton & Nanoelect Mat & Its De, Suzhou 215009, Peoples R China
来源：
CHEMISTRYSELECT | 2024年 / 9卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Photocatalysis; Photodegradation; Bioar-based materials; Iron oxide; Organic azo dyes; AZO-DYE; ALPHA-FE2O3; NANOSTRUCTURE; DEGRADATION; HYDROGEN; CEO2; ZNO;
D O I：
10.1002/slct.202301563
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Herein we synthesized biochar/iron oxide composite (C/alpha-Fe2O3/gamma-Fe2O3) by two-step calcination method. The prepared C/alpha-Fe2O3/gamma-Fe2O3 had a highly pure and a concentration ratio of alpha-Fe2O3 and gamma-Fe2O3 about 1 : 1. The optical properties of as-synthesized C/alpha-Fe2O3/gamma-Fe2O3 show a lower bandgap energy (1.90 eV) than that of pure C/alpha-Fe2O3 (2.02 eV). The effects of different biochar composite catalysts on the removal of amino black were investigated. Upon illumination, the total removal rate of amino black dye by C/alpha-Fe2O3/gamma-Fe2O3 catalyst reached 98 %, which was about 1.7 times that of C/alpha-Fe2O3. In addition, the coercivity and the remanence intensity of C/alpha-Fe2O3/gamma-Fe2O3 is respectively 1.81 times and 7.17 times that of C/alpha-Fe2O3. The catalyst could be magnetically separated and reused for five times with a slight loss of its reactivity. The study of biochar composite provides a new direction for the removal of toxic organic dye in wastewater.
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页数：6
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