Wide spectral degradation of Norfloxacin by Ag@BiPO_4/BiOBr/BiFeO_3 nano-assembly: Elucidating the photocatalytic mechanism under different light sources 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Journal of hazardous materials
年/卷/期
2019 / 364 / Feb.15
页码
429-440
ISSN号
0304-3894
作者单位
Shenzhen Univ, Guangdong Res Ctr Interfacial Engn Funct Mat, Nanshan Dist Key Lab Biopolymers & Safety Evaluat, Coll Mat Sci & Engn,Shenzhen Key Lab Polymer Sci, Shenzhen 518055, Peoples R China;Shoolini Univ, Sch Chem, Solan 173229, Himachal Prades, India;King Saud Univ, Dept Chem, Coll Sci, Bldg 5, Riyadh 11451, Saudi Arabia;Sultan Qaboos Univ, Fac Engn, Dept Petr & Chem Engn, Muscat, Oman;Shenzhen Univ, Coll Optoelect Engn, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China;
作者
Kumar, Amit;Sharma, Sunil Kumar;Sharma, Gaurav;Al-Muhtaseb, Ala'a H.;Naushad, Mu.;Ghfar, Ayman A.;Stadler, Florian J.;
摘要
Metallic Ag deposited BiPO4/BiOBr/BiFeO3 ternary nano-hetero-structures were rationally designed and synthesized by a simple precipitation-wet impregnation-photo deposition method. The plasmonic junction possesses an excellent wide spectrum photo-response and makes best use of BiPO4 which is otherwise a poor photocatalyst. Ag@BiPO4/BiOBr/BiFeO3 showed superior photocatalytic activity for degradation of norfloxacin (NFN) under visible, ultra-violet, near-infra-red and natural solar light. Especially catalyst APBF-3 (0.3 wt% Ag@BiPO4/BiOBr/BiFeO3) shows 98.1% degradation of NFN (20 mg/L) in 90 min under visible light and 99.1% in less than 45 min under UV exposure. Free radical scavenging experiments and electron spin resonance (ESR) results has been used for explanation of charge transfer, photocatalytic mechanism and role of radicals for binary, ternary and Ag deposited ternary junctions for UV and visible exposure. Metallic Ag in addition to its surface plasmon resonance helps in protection of high conduction band and valence band in the three semiconductors. A dual Z-scheme mechanism has been predicted by comparing with possibilities of double charge and vectorial charge transfer.
机翻摘要
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关键词/主题词
BiPO4;Nano-heterojunction;Photocatalysis;Norfloxacin;Wide spectrum;Dual Z-scheme;
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