用V2O5溶液燃烧合成YVO4纳米粉体。nH2O凝胶:光降解研究

IF 1.5 4区 材料科学 Q3 MATERIALS SCIENCE, CERAMICS Transactions of the Indian Ceramic Society Pub Date : 2021-01-02 DOI:10.1080/0371750X.2020.1864664
Rajeshwari Gangadharachar, G. Chandrappa
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引用次数: 0

摘要

以柠檬酸为燃料,采用溶液燃烧法合成了原钒酸钇(YVO4)纳米粉体。主要目的是以五氧化二钒(V2O5.nH2O)凝胶为前驱体,建立一种简单的溶液燃烧反应制备低带隙YVO4纳米粉体,然后研究其在可见光存在下对阴离子和阳离子染料的光催化活性。粉末X射线衍射(PXRD)分析揭示了纯YVO4的形成,其具有晶粒尺寸~30.95 nm的四方相。扫描电子显微照片(SEM)显示了该产品的高度多孔性。对YVO4纳米粉末的Breauner-Emmet-Teller(BET)表面积分析显示,其比表面积相对较大,约为46.57 m2.g–1。透射电子显微镜(TEM)显示出均匀的粒度分布,平均粒度在20-100nm的范围内变化。使用YVO4的紫外漫反射光谱(UV-DRS)计算2.16eV的带隙。YVO4纳米粉体的光致发光光谱在572.2nm处出现发射峰。YVO4作为光催化剂对亚甲基蓝(MB)的光催化降解在可见光辐射下表现出92%的脱色率。光催化活性也被扩展到研究在可见光照射下对紫红色染料和罗丹明-B(Rh-B)的降解,结果表明,使用YVO4纳米粉末,紫红色染料的降解率为80%,而Rh-B的脱色率仅为65%。因此,与Rh-B相比,YVO4纳米粉末对MB和紫红色染料表现出良好的光催化活性。图形摘要
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Solution Combustion Synthesis of YVO4 Nanopowder Using V2O5.nH2O Gel: Photodegradation Studies
In the present work, yttrium orthovanadate (YVO4) nanopowder has been synthesized via solution combustion route using citric acid as fuel. The primary aim is to establish a facile solution combustion reaction to produce YVO4 nanopowder with lower band gap using vanadium pentoxide (V2O5.nH2O) gel as precursor and then investigation of its photocatalytic activity against anionic and cationic dyes in presence of visible light. The powder X-ray diffraction (PXRD) analysis reveals the formation of pure YVO4 with tetragonal phase having crystallite size ∼30.95 nm. Scanning electron micrograph (SEM) exhibits highly porous nature of the product. Breauner-Emmet-Teller (BET) surface area analysis of YVO4 nanopowder shows a relatively large specific surface area of ∼46.57 m2.g–1. Transmission electron microscopy (TEM) exhibits uniform particle size distribution with average particle sizes varying in the range of 20-100 nm. The band gap of 2.16 eV is calculated using the ultraviolet diffuse reflectance spectrum (UV-DRS) of YVO4. The photoluminescence spectrum of YVO4 nanopowder shows emission peak at 572.2 nm. The photocatalytic degradation of methylene blue (MB) using YVO4 as photocatalyst shows 92% decolorization in presence of visible radiation. Photocatalytic activity has also been extended to investigate the degradation of amaranth dye and rhodamine-B (Rh-B) under visible light irradiation which reveals 80% degradation of amaranth dye but Rh-B shows only 65% decolorization using YVO4 nanopowder. Hence YVO4 nanopowder shows good photocatalytic activity for MB and amaranth dye compared to Rh-B. GRAPHICAL ABSTRACT
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来源期刊
Transactions of the Indian Ceramic Society
Transactions of the Indian Ceramic Society 工程技术-材料科学:硅酸盐
CiteScore
2.40
自引率
8.30%
发文量
12
审稿时长
2.3 months
期刊介绍: Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.
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