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Hydrothermal carbonation carbon-based photocatalysis under visible light: Modification for enhanced removal of organic pollutant and novel insight into the photocatalytic mechanism.
Wang, Guanlong; Bi, Wenxin; Zhang, Qunmei; Dong, Xiaoli; Zhang, Xiufang.
Afiliação
  • Wang G; School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
  • Bi W; School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
  • Zhang Q; School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
  • Dong X; School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
  • Zhang X; School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China. Electronic address: zhangxf@dlpu.edu.cn.
J Hazard Mater ; 426: 127821, 2022 03 15.
Article em En | MEDLINE | ID: mdl-34810004
Hydrothermal carbonation carbon (HTCC) is emerging as a promising alternative for photocatalytic removal of contaminants from water. However, the catalytic activity of HTCC is limited by its poor charge transfer ability, and its photocatalytic mechanism remains unclear. Herein, a unique photosensitization-like mechanism was firstly found on Fe modified HTCC (Fe-HTCC) derived from glucose for effective removal of organic pollutants. Under visible light illumination, the organic pollutant coordinated with Fe-HTCC enabled electrons transfer from its highest occupied molecular orbital (HOMO) to conduction band (CB) of Fe-HTCC, which not only oxidized pollutant itself, but also generated oxygen-centered radical for reducing O2 into O2•- towards pollutant removal. The degradation kinetic constant of sulfamethoxazole (SMX) over Fe-HTCC was about 1024.4 and 20.5 times higher than that of HTCC and g-C3N4, respectively. The enhanced performance of Fe-HTCC was originated from dual role of Fe modification: one is to boost the electron-deficient C sites which prefer to coordinate with amino or hydroxyl of pollutants; the other is to enhance the linkage of discrete polyfuran chains in Fe-HTCC for effective electron transfer from pollutant to Fe-HTCC. This work provides new insight into the synthesis and mechanism of HTCC-based high-efficiency photocatalyst for water decontamination.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Carbono / Poluentes Ambientais Idioma: En Revista: J Hazard Mater Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Carbono / Poluentes Ambientais Idioma: En Revista: J Hazard Mater Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China