化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (5) : 129-133. DOI: 10.19817/j.cnki.issn 1006-3536.2021.05.029

新材料与新技术

银修饰WO_3-x薄膜的制备及光催化性能研究

^1,2*

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Preparation of Ag modified WO_3-x film and their photocatalytic performance

He Yuanzi¹, Ding Chunhua^1,2, Jiang Hong¹, Zhang Song¹, Wen Man¹

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Received		Published
2020-02-17		2021-05-20
Issue Date	Revised Date
2021-06-10	2020-02-17

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摘要

采用磁控溅射法在玻璃基底上制备了非化学计量比的WO_3-x薄膜,并进一步在WO_3-x表面负载了不同含量的银(Ag)纳米粒子。采用扫描电镜、原子力显微镜、X射线衍射仪、X射线光电子能谱仪、紫外-可见光谱仪、荧光分光光度计等分析方法对样品进行了表征。可见光条件下以催化降解亚甲基蓝为探针反应考察了Ag含量对薄膜光催化性能的影响。结果表明:室温下制备的样品表面粗糙度较大,呈非晶态。负载适量Ag后,薄膜吸收可见光能力显著增强,光生电子-空穴对更加稳定。Ag修饰量为6.2%时,WO_3-x/Ag薄膜对亚甲基蓝的降解率最高,反应2h后催化剂对亚甲基蓝的降解率达到93.6%,比纯WO_3-x降解率提高23%,反应常数k为1.249h^-1,是纯WO_3-x反应速率的2.04倍。

Abstract

Non-stoichiometric WO_3-x thin films were prepared on the glass substrate by magnetron sputtering method.Furthermore,different amounts of Ag nanoparticles were loaded on the surface of WO_3-x.SEM,AFM,XRD,XPS,UV-Vis and PL were used to characterize the samples.The results shown that all samples were amorphous and had large surface roughness.Loading Ag significantly increased the ability of the films to absorb visible light,and enhanced the separation of the photogenerated electron-hole pairs.Visible-light driven degradation of methylene blue was conducted to investigate effect of different Ag amounts on the photocatalytic performance of the film.When amount of Ag was 6.2%,the degradation rate of methylene blue by WO_3-x/Ag was the highest.After 2h of reaction,the degradation rate of methylene blue by WO_3-x/Ag was 93.6%,which was 23% higher than that of pure WO_3-x.The reaction rate constant k of WO_3-x/Ag was 1.249h^-1 which was 2.04 times higher than pure WO_3-x.

关键词

磁控溅射 / 氧化钨 / 氧空位 / 银修饰 / 亚甲基蓝

Key words

magnetron sputtering / tungsten oxide / oxygen vacancy / Ag nanoparticles / methylene blue

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银修饰WO_3-x薄膜的制备及光催化性能研究[J]. 化工新型材料, 2021, 49(5): 129-133 DOI:10.19817/j.cnki.issn 1006-3536.2021.05.029

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