Constructing novel multifunctional materials is a promising approach to boost the catalysis activity and electrochemical performance simultaneously. Herein, hydrothermal synthesized FeVO4 nanosized particles dispersed on reduced graphene oxide (rGO) through cost‐effective simple sonochemical assisted route are developed as an efficient material for photocatalysis activity and high‐value‐added supercapacitor applications. The synthesized materials were characterized for structural and morphological purity and found to be in single phase and nanostructured. rGO‐FeVO4 composite shows excellent photodegradation of Levofloxacin (LVO) drug (100% over 80 min) compared with FeVO4 owing to the bandgap in visible region and larger surface area. Further, the optimized rGO‐FeVO4 composite was employed into supercapacitors, and it showed 3 times higher capacitance (211.4 F/g at 0.5 A/g) compared with FeVO4 (70.4 F/g) using half‐cell measurements. Moreover, the developed symmetric supercapacitors (full cell; SSCs) using rGO‐FeVO4 composite device showed 109 F/g capacitance at 0.5 A/g current density having high energy density of 13.6 Wh/kg at the power density of 450 W/kg. The proposed rGO‐FeVO4 composite proved its multifunctional outcomes, which can open new opportunities to develop such materials for numerous future applications.

中文翻译：

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FeVO4 和 rGO - FeVO4 纳米复合材料的光催化药物降解和超级电容器应用

构建新型多功能材料是同时提高催化活性和电化学性能的一种有前途的方法。在此，通过经济有效的简单声化学辅助途径分散在还原氧化石墨烯（rGO）上的水热合成的 FeVO4 纳米粒子被开发为光催化活性和高附加值超级电容器应用的有效材料。对合成材料的结构和形态纯度进行了表征，发现其为单相和纳米结构。与 FeVO4 相比，rGO-FeVO4 复合材料由于可见光区域的带隙和更大的表面积，对左氧氟沙星 (LVO) 药物表现出优异的光降解性（80 分钟内 100%）。此外，优化的 rGO-FeVO4 复合材料被用于超级电容器，使用半电池测量，其电容（0.5 A/g 时为 211.4 F/g）是 FeVO4 (70.4 F/g) 的 3 倍。此外，使用rGO-FeVO4复合器件开发的对称超级电容器（全电池；SSC）在0.5 A/g电流密度下显示出109 F/g的电容，在450 W/kg的功率密度下具有13.6 Wh/kg的高能量密度。所提出的 rGO-FeVO4 复合材料证明了其多功能性，这可以为开发此类材料用于众多未来应用开辟新的机会。