The construction of high efficient visible-light-driven 3D porous g-C3N4/Fe3O4 photocatalyst: A new photo-induced bacterial inactivation material enhanced by cascade photo-Fenton reaction
文献类型： 外文期刊
作者： Liu, Ze-Yu 1 ; Huang, Wen-Qian 2 ; Huang, Chuan-Qing 1 ; Liu, Zhao-Zhen 1 ; Tang, Xiao-Yue 1 ; Chen, Wei-Chang 1 ; Tang, Zheng-Zheng 1 ; Huang, Yu-Xing 1 ; Zheng, Shuo-Chun 1 ; Lin, Lin 4 ; Li, Changzhu 5 ; Ye, Yong 1 ;
作者机构： 1.South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510641, Peoples R China
2.Guangdong Acad Agr Sci, Sericulture & Agrifood Res Inst, Key Lab Funct Foods, Minist Agr & Rural Affairs,Guangdong Key Lab Agr, Guangzhou 510610, Peoples R China
3.Jiangxi Environm Engn Vocat Coll, Ganzhou 341000, Peoples R China
4.Jiangsu Univ, Sch Food & Biol Engn, Zhenjiang 212013, Jiangsu, Peoples R China
5.Hunan Acad Forestry, State Key Lab Utilizat Woody Oil Resource, Changsha 410007, Peoples R China
6.SCUT Zhuhai Inst Modern Ind Innovat, Zhuhai 519175, Peoples R China
关键词： Porous graphitic carbon nitride; Photocatalyst; Visible light; Cascade photo -Fenton reaction; Bacterial inactivation
期刊名称：CHEMOSPHERE （ 影响因子：8.8； 五年影响因子：8.3 ）
ISSN： 0045-6535
年卷期： 2023 年 312 卷
页码：
收录情况： SCI
摘要： Photocatalytic disinfection is considered a promising method for eliminating the hazards of pathogenic bacteria. Graphitic carbon nitride (g-C3N4) is an ideal photocatalytic bacterial inactivation material for its advantage of tunable band structure, good stability and easy preparation. This work has constructed a novel defective 3D porous g-C3N4 by cyanamide carbonation using dendritic mesoporous silica template. The direct loading of Fe3O4 nanoparticles provided an excellent pg-C3N4-Fe3O4 photocatalyst suitable for water disinfection. Compared to pristine g-C3N4, the prepared 3D porous defective g-C3N4-Fe3O4 exhibited the enhanced visible light absorbance as indicated by the band gap decreasing of 0.66 eV, and about 3 and 10 fold increase of photo-induced current response and O2 adsorption respectively. The pg-C3N4-Fe3O4 showed excellent visible-light-driven photo -catalytic bactericidal activity. It could kill 1 x 107 cfu mL-1 Escherichia coli completely within 1 h under visible -light illumination (100 mW cm -2) with good reusability, its logarithmic bacterial inactivation efficiency was about 2.5 fold higher than pg-C3N4. The enhanced bactericidal performance is mainly ascribed to the Fe3O4 involved cascade photo-Fenton reaction.
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