化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (10) : 135-138. DOI: 10.19817/j.cnki.issn 1006-3536.2020.10.029

新材料与新技术

商用TiO₂负载贵金属光催化剂的制备及其降解含染料废水的性能研究

杨黄根, 冉小春, 檀家雯, 周星玲, 朱立刚, 覃利琴

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Preparation of noble metal supported commercial TiO₂ photocatalyst and its degradation performance for dye-containing wastewater

Yang Huangen, Ran Xiaochun, Tan Jiawen, Zhou Xingling, Zhu Ligang, Qin Liqin

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摘要

以商用TiO₂(Macklin P25)为载体,采用聚乙烯吡咯烷酮(PVP)或聚乙烯醇(PVA)保护的还原法制备M/TiO₂(M为Ag、Au、Pd或Pt,M理论质量分数均为0.5%)光催化剂,利用X射线粉末衍射、紫外-可见漫反射光谱、荧光光谱等分析手段对TiO₂及M/TiO₂的物化性质进行了表征,并对其在可见光照射下降解甲基橙(MO)的光催化活性进行评价。结果表明,Pt/TiO₂具有优良的可见光驱动降解MO的光催化活性,这与其具有纯锐钛矿晶相、强可见光吸收性能、低带隙能(2.89eV)以及光生电子和空穴的低复合率有关。

Abstract

With the commercial TiO₂ (Macklin P25) as the support,M/TiO₂ (M=Ag,Au,Pd or Pt,the theoretical M weight percentage was 0.5wt%,respectively) photocatalysts were prepared using the polyvinyl pyrrolidone (PVP) or polyvinyl alcohol (PVA)-protected reduction methods.Physicochemical properties of the TiO₂ and M/TiO₂ samples were characterized by X-ray powder diffraction (XRD),ultraviolet visible diffuse reflection spectroscopy (UV-Vis DRS),photoluminescence (PL) spectrum analysis technology,and their photocatalytic activities were evaluated for the removal of methyl orange (MO) under visible-light illumination.It was found that the high visible-light-driven catalytic performance of the Pt/TiO₂ sample was associated with its pure anatase crystal phase,strong visible light absorption performance,low bandgap energy (2.89eV) as well as low recombination rate of photogenerated electrons and holes.

关键词

商用纳米二氧化钛 / 贵金属负载 / 可见光光催化 / 有机染料降解

Key words

commercial TiO₂ / noble metal supporting / visible-light-driven photocatalysis / organic dye degradation

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商用TiO₂负载贵金属光催化剂的制备及其降解含染料废水的性能研究[J]. 化工新型材料, 2020, 48(10): 135-138 DOI:10.19817/j.cnki.issn 1006-3536.2020.10.029

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原文顺序 | 出版日期 | 本文引用

[1] Fujishima A, Honda K.Electrochemical photolysis of water at a semiconductor electrode[J].Nature, 1972, 238:37-38.
[2] Lazar M A, Daoud W A.Achieving selectivity in TiO₂-based photocatalysis[J].RSC Adv, 2013, 3:4130-4140.
[3] Li J, Hoffmann M W G, Shen H, et al.Enhanced photoelectrochemical activity of an excitonic staircase in CdS@TiO₂ and CdS@anatase@rutile TiO₂ heterostructures[J].J Mater Chem, 2012, 22:20472-20476.
[4] Li X H, Antonietti M.Metal nanoparticles at mesoporous N-doped carbons and carbon nitrides:functional mott-schottky heterojunctions for catalysis[J].Chem Soc Rev, 2013, 42:6593-6604.
[5] Murdoch M, Waterhouse G I N, Nadeem M A, et al.The effect of gold loading and particle size on photocatalytic hydrogen production from ethanol over Au/TiO₂ nanoparticles[J].Nature Chem, 2011, 3:489-492.
[6] Li X Z, Li F B.Study of Au/Au³⁺-TiO₂ photo-catalysts toward visible photo-oxidation for water and wastewater treatment[J].Environ Sci Technol, 2001, 35:2381-2387.
[7] Zhong J B, Lu Y, Jiang D W, et al.Characterization and photocatalytic property of Pd/TiO₂ with the oxidation of gaseous benzene[J].J Hazard Mater, 2009, 168(2/3):1632-1635.
[8] Wu Z B, Sheng Z Y, Liu Y, et al.Characterization and activity of Pd-modified TiO₂ catalysts for photocatalytic oxidation of NO in gas phase[J].J Hazard Mater, 2009, 164:542-548.
[9] Comotti M, Li W C, Spliethoff B, et al.Support effect in high activity gold catalysts for CO oxidation[J].J Am Chem Soc, 2006, 128:917-924.
[10] Zhang K F, Liu Y X, Deng J G, et al.Co-Pd/BiVO₄:high-performance photocatalysts for the degradation of phenol under visible light irradiation[J].Appl Catal B, 2018, 224:350-359.
[11] Duan Y Y, Luo J M, Zhou S C, et al.TiO₂-supported Ag nanoclusters with enhanced visible light activity for the photocatalytic removal of NO[J].Appl Catal B, 2018, 234:206-212.
[12] Pan H, Zhang Y W, Shenoy V B, et al.Ab initio study on a novel photocatalyst:functionalized graphitic carbon nitride nanotube[J].ACS Catal, 2011, 1:99-104.