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.

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。