The contamination of water from industrial pollutants is the most significant concern for environment. Semiconductors have been at forefront of effective elimination of pollutants from waste water, with the tuning of bandgap and improving the photocatalytic activity. This work elaborates the hydrothermal synthesize of highly stable Nickel Oxide (NiO) and Vanadium-doped Nickel Oxide (V-NiO) nanoparticles. The undoped and doped Nickel Oxide nanoparticles were characterized for structural, morphological, thermal and optical properties. X-ray diffraction pattern reveals the V-NiO stabilized in cubic structure. Morphological analysis demonstrates that upon Vanadium doping NiO particles transform from network like structure to spherical nanoparticles. NiO and V-NiO nanoparticles have an average crystallite size of 42 nm and 26 nm which are well matched with particle size calculated from transmission electron micrographs. The photoluminescence study reveals that the Vanadium substitution specifically reduces the rate of recombination in NiO. The V-NiO catalysts exhibited noticeable red shift of absorption spectrum to the visible region in comparison with pure NiO. The functional groups were studied using Fourier Transform Infrared Spectroscopy (FTIR). The photocatalytic study by degradation of Xylenol Orange (XyO) under sunlight irradiation unveils that photocatalytic activity of NiO is enhanced on vanadium doping. Reaction kinetics investigation of XyO degradation revealed that the reaction obeys the pseudo-zero-order model with improved rate constant of 0.115 mol L⁻¹S⁻¹ and 0.225 mol L⁻¹S⁻¹ for NiO and V-NiO, respectively. The retention of high performance and structural stability of photocatalysts after four consecutive degradation cycles implies the reusability of the catalyst. Consequently, the V-NiO with high photocatalytic activity with improved cyclic stability is able to provide as a promising material in the field of environmental remediation.

工业污染物对水的污染是环境最重要的问题。随着带隙的调整和光催化活性的提高，半导体一直处于有效消除废水中污染物的最前沿。这项工作阐述了高度稳定的氧化镍（NiO）和钒掺杂的氧化镍（V-NiO）纳米粒子的水热合成。对未掺杂和掺杂的氧化镍纳米粒子进行了结构，形态，热和光学性质的表征。X射线衍射图显示V-NiO稳定在立方结构中。形态分析表明，钒掺杂后，NiO颗粒从网状结构转变为球形纳米颗粒。NiO和V-NiO纳米粒子的平均微晶尺寸为42 nm和26 nm，这与通过透射电子显微照片计算得出的粒径非常匹配。光致发光研究表明，钒取代会特别降低NiO中的重组速率。与纯NiO相比，V-NiO催化剂显示出吸收光谱向可见光区域的明显红移。使用傅立叶变换红外光谱法（FTIR）研究了官能团。通过在阳光照射下降解二甲酚橙（XyO）的光催化研究表明，钒掺杂可增强NiO的光催化活性。XyO降解的反应动力学研究表明，该反应服从拟零级模型，速率常数提高了0.115 mol L 光致发光研究表明，钒取代会特别降低NiO中的重组速率。与纯NiO相比，V-NiO催化剂显示出吸收光谱向可见光区域的明显红移。使用傅立叶变换红外光谱法（FTIR）研究了官能团。通过在阳光照射下降解二甲酚橙（XyO）的光催化研究表明，钒掺杂可增强NiO的光催化活性。XyO降解的反应动力学研究表明，该反应服从拟零级模型，速率常数提高了0.115 mol L 光致发光研究表明，钒取代会特别降低NiO中的重组速率。与纯NiO相比，V-NiO催化剂显示出吸收光谱向可见光区域的明显红移。使用傅立叶变换红外光谱法（FTIR）研究了官能团。通过在阳光照射下降解二甲酚橙（XyO）的光催化研究表明，钒掺杂可增强NiO的光催化活性。XyO降解的反应动力学研究表明，该反应服从拟零级模型，速率常数提高了0.115 mol L 使用傅立叶变换红外光谱法（FTIR）研究了官能团。通过在阳光照射下降解二甲酚橙（XyO）的光催化研究表明，钒掺杂可增强NiO的光催化活性。XyO降解的反应动力学研究表明，该反应服从拟零级模型，速率常数提高了0.115 mol L 使用傅立叶变换红外光谱法（FTIR）研究了官能团。通过在阳光照射下降解二甲酚橙（XyO）的光催化研究表明，钒掺杂可增强NiO的光催化活性。XyO降解的反应动力学研究表明，该反应服从拟零级模型，速率常数提高了0.115 mol L对于NiO和V-NiO，分别为^-1 S ^-1和0.225 mol L ^-1 S ^-1。连续四个降解循环后，光催化剂的高性能和结构稳定性得以保持，这意味着该催化剂可重复使用。因此，具有高的光催化活性和改善的循环稳定性的V-NiO能够作为环境修复领域中有希望的材料。