化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (1) : 135-140. DOI: 10.19817/j.cnki.issn1006-3536.2023.01.026

新材料与新技术

nCeO₂/Au复合材料的制备及其光电性能研究

作者信息 +

Preparation and optoelectronic properties of nCeO₂/Au composites

Wang Li, Wang Qilin, Zhou Jie, Weng Jie, Feng Bo

Author information +

文章历史 +

Received		Published
2021-08-31		2023-01-20
Issue Date	Revised Date
2023-02-02	2021-08-31

PDF

摘要

以硝酸铈铵为铈源,通过水热法合成了高度分散的氧化铈纳米颗粒(nCeO₂)。利用沉淀沉积法将金与nCeO₂复合,得到小尺寸的纳米氧化铈/金(nCeO₂/Au)复合材料。通过X射线衍射仪、透射电子显微镜和X射线光电子能谱仪对nCeO₂以及nCeO₂/Au复合材料的晶体结构、形貌和化学组分进行分析。采用紫外-可见分光光度计、拉曼光谱仪及电化学工作站等多种表征方法评价样品的光电性能。结果表明,与nCeO₂相比,nCeO₂/Au复合材料具有更高的可见光吸收和转换能力,增强了氧空位形成,抑制了光生电子-空穴对的复合,促进了可见光下活性氧的产生。

Abstract

Highly dispersed cerium oxide nanoparticles (nCeO₂) were synthesized by hydrothermal method with ammonium cerium nitrate as the cerium source.Then small-sized cerium oxide/gold nanocomposites (nCeO₂/Au) were prepared by precipitation deposition method.The crystal structure,morphology and chemical composition of nCeO₂ and nCeO₂/Au were analyzed with X-ray diffraction analyzer,transmission electron microscope and X-ray photoelectron spectrometer.The photoelectronic properties of samples were characterized with ultraviolet spectrophotometer,Raman spectrometer and electrochemical workstation.The results showed that,compared with nCeO₂,nCeO₂/Au displayed stronger adsorption and photoelectric conversion of visible light,promoted the production of active oxygen under visible light,enhanced formation of oxygen vacancies and lower recombination of photogenerated electron-hole pairs.

关键词

氧化铈 / 氧空位 / 光电性能 / 活性氧

Key words

cerium oxide / oxygen vacancies / photoelectric property / active oxygen

引用本文

引用格式 ▾

nCeO₂/Au复合材料的制备及其光电性能研究[J]. 化工新型材料, 2023, 51(1): 135-140 DOI:10.19817/j.cnki.issn1006-3536.2023.01.026

登录浏览全文

4963

注册一个新账户忘记密码

参考文献

原文顺序 | 出版日期 | 本文引用

[1] Ma R,Zhang S,Wen T,et al.A critical review on visible-light-response CeO₂-based photocatalysts with enhanced photooxidation of organic pollutants[J].Catal Today,2018,335:20-30.
[2] Wen X J,Niu C G,Zhang L,et al.Photocatalytic degradation of levofloxacin by ternary Ag₂CO₃/CeO₂/AgBr photocatalyst under visible-light irradiation:degradation pathways,minera-lization ability,and an accelerated interfacial charge transfer process study[J].J Catal,2018,358:211-223.
[3] Wen X J,Niu C G,Zhang L,et al.Photocatalytic degradation of ciprofloxacin by a novel Z-scheme CeO₂-Ag/AgBr photocatalyst:influencing factors,possible degradation pathways,and mechanism insight[J].J Catal,2018,358:141-154.
[4] Li J T,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(38):20472-20476.
[5] 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(16):6593-6604.
[6] Baffou G,Quidant R.Nanoplasmonics for chemistry[J].Chem Soc Rev,2014,43(11):3898-3907.
[7] Ma X C,Dai Y,Yu L,et al.Energy transfer in plasmonic photocatalytic composites[J].Light-Sci Appl,2016,5(1):695-707.
[8] Tanaka A,Sakaguchi S,Hashimoto K,et al.Preparation of Au/TiO₂ with metal cocatalysts exhibiting strong surface plasmon resonance effective for photoinduced hydrogen formation under irradiation of visible light[J].ACS Catal,2013,3(1):79-85.
[9] Xiao M D,Jiang R B,Wang F,et al.Plasmon-enhanced chemical reactions[J].J Mater Chem A,2013,1(19):5790-5805.
[10] Zhang X Y,You R,Li D,et al.Reaction sensitivity of ceria morphology effect on Ni/CeO₂ catalysis in propane oxidation reactions[J].ACS Appl Mater Inter,2018,9(41):35897-35907.
[11] Bu Y B,Weststrate C J,Niemantsverdriet J W,et al.Role of ZnO and CeO_x in Cu-based model catalysts in activation of H₂O and CO₂ dynamics studied by in situ ultraviolet-visible and X-ray photoelectron spectroscopy[J].ACS Catal,2016,6(12):7994-8003.
[12] Bu Y B,Chen Y F,Jiang G M,et al.Understanding of Au-CeO₂ interface and its role in catalytic oxidation of formaldehyde[J].Appl Catal B,2019,260:118-138.
[13] Pinzon M J,Alfonsoa J E,Olaya J J,et al.Annealing effect on corrosion resistance of BixTiyOz coatings[J].Rev Mex Fis,2016,62(5):450-455.
[14] Schlexer P,Widmann D,Behm R J,et al.CO oxidation on a Au/TiO₂ nanoparticle catalyst via the Au-assisted mars-van krevelen mechanism[J].ACS Catal,2018,8(7):6513-6525.
[15] Quiroz J,Giraudon J M,Gervasini A,et al.Total oxidation of formaldehyde over MnO_x-CeO₂ catalysts:the effect of acid treatment[J].ACS Catal,2015,5(4):2260-2269.
[16] Gnanam S,Rajendran V.Facile sol-gel preparation of Cd-doped cerium oxide (CeO₂) nanoparticles and their photoca-talytic activities[J].J Alloy Compd,2018,735:1854-1862.
[17] Huang W,Tan Y J,Li D W,et al.Improved photo-luminescence by co-doped lithium in the phosphor system CeO₂:Eu³⁺[J].J Lumin,2019,206:432-439.
[18] Ping J T,Peng H S,Qin J L,et al.A fluorescent nanoprobe for real-time monitoring of intracellular singlet oxygen during photodynamic therapy[J].Microchimica Acta,2018,185(5):269-278.
[19] Ke X B,Zhang X G,Zhao J,et al.Selective reductions using visible light photocatalysts of supported gold nanoparticles[J].Green Chem,2013,15(1):236-244.
[20] Ardestani A,Yazdanparast R.Antioxidant and free radical scavenging potential of Achillea santolina extracts[J].Food Chemistry,2007,104(1):21-29.
[21] 徐晓玲.氧化锌抗菌及降解有机污染物活性研究[D].成都:西南交通大学,2012.