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Solution Combustion Synthesis of YVO4 Nanopowder Using V2O5.nH2O Gel: Photodegradation Studies
Transactions of the Indian Ceramic Society ( IF 1.5 ) Pub Date : 2021-03-17 , DOI: 10.1080/0371750x.2020.1864664
Rajeshwari Gangadharachar 1 , Gujjarahalli Thimmanna Chandrappa 1
Affiliation  

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.



中文翻译:

V2O5.nH2O凝胶溶液燃烧合成YVO4纳米粉的光降解研究

在目前的工作中,已经通过使用柠檬酸作为燃料的溶液燃烧路线合成了原钒酸钇(YVO 4)纳米粉。主要目的是建立一种简便的溶液燃烧反应,以五氧化二钒(V 2 O 5 .nH 2 O)凝胶为前体,制备具有较低带隙的YVO 4纳米粉,然后研究其在存在下对阴离子和阳离子染料的光催化活性。可见光。粉末X射线衍射(PXRD)分析揭示了纯YVO 4的形成晶体尺寸约为30.95 nm的四方晶相。扫描电子显微照片(SEM)显示出该产品的高度多孔性。的YVO Breauner-埃米特-特勒(BET)表面积分析4个纳米粉末节目~46.57米的相对大的比表面积2 .G -1。透射电子显微镜(TEM)表现出均匀的粒径分布,平均粒径在20-100 nm范围内变化。使用YVO 4的紫外漫反射光谱(UV-DRS)计算出2.16 eV的带隙。YVO 4纳米粉的光致发光光谱在572.2 nm处显示出发射峰。使用YVO 4光催化降解亚甲基蓝(MB)因为光催化剂在可见光辐射下显示92%的脱色。光催化活性也已得到扩展,以研究可见光照射下a菜染料和若丹明-B(Rh-B)的降解,揭示出80菜染料的降解率为80%,而使用YVO 4纳米粉剂,Rh-B仅显示65%的脱色。因此,与Rh-B相比,YVO 4纳米粉体对MB和a菜染料显示出良好的光催化活性。

更新日期:2021-03-30
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