Synthesis of mesoporous Ag/α-Fe2O3/TiO2 heterostructures with enhanced and accelerated photo/-catalytic reduction of 4-nitrophenol

被引:0
作者
Atif Mossad Ali
Hamza El-hosainy
Iman Y. Alhassan
Latifa A. Al-Hajji
Adel A. Ismail
Hamed Algarni
Haitham M. El-Bery
机构
[1] King Khalid University,Department of Physics, Faculty of Science
[2] Assiut University,Department of Physics, Faculty of Science
[3] Kafrelsheikh University,Institute of Nanoscience & Nanotechnology
[4] Laboratory Technology,Nanotechnologyand Advanced Materials Program, Energy & Building Research Center
[5] Department College of Technological Studies (PAAET),Department of Chemistry, Faculty of Science
[6] Kuwait Institute for Scientific Research (KISR),undefined
[7] Assiut University,undefined
来源
Environmental Science and Pollution Research | 2023年 / 30卷
关键词
Ag NPs; Fe; O; /TiO; Mesoporous; Reduction of 4-nitrophenol; Plasmon resonance;
D O I
暂无
中图分类号
学科分类号
摘要
4-Nitrophenol (4-NP) is reported to originate disadvantageous effects on the human body collected from industrial pollutants; therefore, the detoxification of 4-NP in aqueous contamination is strongly recommended. In this study, the heterojunction mesoporous α-Fe2O3/TiO2 modulated with diverse Ag percentages has been constructed via a sol–gel route in the occurrence of a soft template P123. The formation of biphasic crystalline TiO2 anatase and brookite phases has been successfully achieved with the average 10 nm particle sizes. The photo/-catalytic reduction of 4-NP has been performed utilizing NaBH4 as a reducing agent with and without visible illumination. All Ag/Fe2O3/TiO2 nanocomposites exhibited significantly higher photo/-catalytic reduction efficiency than pure Fe2O3, TiO2 NPs, and Fe2O3/TiO2 nanocomposite. 2.5% Ag/Fe2O3/TiO2 nanocomposite was considered the highest and superior photocatalytic reduction efficiency, and it almost achieved 98% after 9 min. Interestingly, the photocatalytic reduction of 4-NP was accelerated 9 times higher than the catalytic reduction over 2.5% Ag/Fe2O3/TiO2; its rate constant value was 709 and 706 times larger than pure TiO2 and Fe2O3 NPs, respectively. The enhanced photocatalytic reduction ability of Ag/Fe2O3/TiO2 nanocomposite might be referred to as significantly providing visible light absorption and a large surface area, and it can upgrade the effective separation and mobility of electron holes. The stability of the synthesized catalysts exhibited that the obtained catalysts can undergo a slight decrease in reduction efficiency after five successive cycles. This approach highlights a novel route for constructing ternary nanocomposite systems with high photo/-catalytic ability.
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页码:41405 / 41418
页数:13
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