1. Biochar/α‐Fe2O3/γ‐Fe2O3 Heterjunction Composite for Photocatalytic Removal of Amino Black.
- Author
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Chen, Feng, Chen, Xiao, Li, Peihe, Zhang, Jingwen, Li, Wanfei, Wang, Gelan, Zhou, Haoyu, Xie, Youfeng, Chen, Zhigang, and Liu, Chengbao
- Subjects
FERRIC oxide ,IRON composites ,ORGANIC dyes ,IRON oxides ,OPTICAL properties ,REMANENCE ,BIOCHAR ,COERCIVE fields (Electronics) - Abstract
Herein we synthesized biochar/iron oxide composite (C/α‐Fe2O3/γ‐Fe2O3) by two‐step calcination method. The prepared C/α‐Fe2O3/γ‐Fe2O3 had a highly pure and a concentration ratio of α‐Fe2O3 and γ‐Fe2O3 about 1 : 1. The optical properties of as‐synthesized C/α‐Fe2O3/γ‐Fe2O3 show a lower bandgap energy (1.90 eV) than that of pure C/α‐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/α‐Fe2O3/γ‐Fe2O3 catalyst reached 98 %, which was about 1.7 times that of C/α‐Fe2O3. In addition, the coercivity and the remanence intensity of C/α‐Fe2O3/γ‐Fe2O3 is respectively 1.81 times and 7.17 times that of C/α‐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. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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