Heterostructured silver phosphate/gold/titanium dioxide nano-sheet film (Ag3PO4/Au/TiO2 NSF) photocatalyst was prepared by the alkali thermal method,chemical reduction method with microwave heating and impregnating-deposition method utilizing Ti disc,chloroauric acid and silver nitrate as main raw materials.The products were characterized,and investigated their photocatalytic performances for degradation of organic dyes methylene blue (MB) in the aqueous phase and removal nitrogen oxides (NOx) in the gas phase.The results showed that the MB removal rate could reach 99.9% by using Ag3PO4/1.0Au/TiO2 NSF within 140min under simulated solar irradiation,and the NO conversion rate was 98.2%.The results also suggested that holes (h+) played the major role and superoxide radical (·O-2) was the secondary active species by the experiments of photogenerated active species trapped.Furthermore,the photocatalytic activity enhancement of Ag3PO4/Au/TiO2 NSF may be ascribed to the synergistic effects of Z-scheme and the local surface plasmon resonance effect of Au nanoparticles.
[1] Chuang K H,Lu C Y,Wey M Y,et al.NO removal by activated carbon-supported copper catalysts prepared by impregnation,polyol,and microwave heated polyol processes[J].Applied Catalysis A(General),2011,397(1/2):234-240.
[2] Linsebigler A L,Lu G,Yates Jr J T.Photocatalysis on TiO2 surfaces:principles,mechanisms,and selected results[J].Chemical Reviews,1995,95(3):735-758.
[3] Liu C,Cao C,Luo X,et al.Ag-bridged Ag2O nanowire network/TiO2 nanotube array p-n heterojunction as a highly efficient and stable visible light photocatalyst[J].Journal of Hazardous Materials,2015,285(3):319-324.
[4] Chen Z,Bing F,Liu Q,et al.Novel Z-scheme visible-light-driven Ag3PO4/Ag/SiC photocatalysts with enhanced photocatalytic activity[J].Journal of Materials Chemistry A,2015,3(8):4652-4658.
[5] Liu E Z,Kang L M,Wu F,et al.Photocatalytic reduction of CO2 into methanol over Ag/TiO2 nanocomposites enhanced by surface plasmon resonance[J].Plasmonics,2014,9(1):61-70.
[6] 司伟,黄妙言,丁思齐,等.微波法辅助合成无机纳米材料的研究进展[J].硅酸盐通报,2013,32(5):868-871.
[7] 汤春妮,董超.微波辅助均匀沉淀法制备磷酸银及其光催化性能研究[J].化学与生物工程,2018,35(1):50-54.
[8] 汤春妮,樊君,高效磷酸银可见光催化剂的制备及脱除NOx的性能研究[J].当代化工,2017,46(2):211-214.
[9] DeSario P A,Pietron J J,DeVantier D E,et al.Plasmonic enhancement of visible-light water splitting with Au-TiO2 composite aerogels[J].Nanoscale,2013,5(17):8073-8083.
[10] 王雷阳,菅傲群,桑胜波,等.Au/TiO2薄膜的制备及等离子体光催化性能研究[J].化工新型材料,2018,46(4):90-93.
[11] Gondal M A,Chang X,Wei E I,et al.Enhanced photoactivity on Ag/Ag3PO4 composites by plasmonic effect[J].Journal of Colloid and Interface Science,2013,392(4):325-330.
基金资助
陕西省自然科学基础研究计划项目(2019JM-389);陕西省教育厅2019年度专项科学研究计划项目(19JK0083);陕西国防工业职业技术学院2018年度科研计划项目(Gfy 18-06)
PDF
(3610KB)
