Water pollution has become a serious problem owing to the development of society.Photocatalysis is a promising approach to remove various pollutants in water,such as organic pollutants and antibiotic re-sistance bacteria.Meanwhile,the design of heterojunction between two semiconductors is an effective path to improve photocatalytic properties due to its potential in improving separation and transfer of photoinduced carriers.In this study,Nb2O5/g-C3N4(NO/CN)composite materials were prepared through a one-step heating method.Characterizations confirmed successful preparation of NO/CN heterojunction structure and better optical properties than pure g-C3N4 and Nb2O5.NO/CN composite materials showed excellent photocatalytic efficiency for Escherichia coli(E.coli)inactivation(95％)compared with the pure Nb2O5(10％)and g-C3N4(77％).Meanwhile,NO/CN exhibited better organic pollutants removal(RhB for 94％,methyl orange(MO)for 15％and methylene blue(MB)for 87％)under visible light,which is likely owing to the heterojunction structure between g-C3N4 and Nb2O5 that leads to the good separation of photogenerated electron-hole pair.Free radical scavenging and electron spin resonance(ESR)experiments demonstrated that superoxide radicals(·O2-)and holes(h+)were the dominant radicals.Therefore,the NO/CN was proposed to be a promising material for effective disinfection and removal of organic con-taminants in water treatment.

Xudong Yang;Jun Duan;Xian Zhang;Hongyu Zhang;Xinlei Liu;Yueqi Feng;Maosheng Zheng

The Key Laboratory of Resources and Environmental System Optimization,Ministry of Education,College of Environmental Science and Engineering,North China Electric Power University,Beijing 102206,China;The Key Laboratory of Water and Sediment Science,Ministry of Education,College of Environment Science and Engineering,Peking University,Beijing 100871,China

中国化学快报（英文版）

[1]Xudong Yang;Jun Duan;Xian Zhang;Hongyu Zhang;Xinlei Liu;Yueqi Feng;Maosheng Zheng-.Heterojunction architecture of Nb2O5/g-C3N4 for enhancing photocatalytic activity to degrade organic pollutants and deactivate bacteria in water)[J].中国化学快报（英文版）,2022(08):3792-3796

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