Abstract The main goal of this work was to investigate the factors that can be effective on the photocatalyst degradation of azo dyes with nickel oxide nanoparticles (NiO-NPs) in aqueous solutions. Among the semiconductor oxides, nickel oxide is commonly utilized due to containing strong chemical stability and high catalytic activity as a competent photocatalyst material for environmentally friendly applications in regards to the degradation of azo dye. Throughout the process of degradation, we have also examined other varying factors such as the pH, light source, amount of photocatalyst, the initial concentration of dyes, light intensity, radiation time, the presence of mineral ions, and type of solvent. This review presents a detailed evaluation that had been performed on the photocatalyst degradation of azo dyes through the means of NiO-NPs and UV light irradiation in wastewater treatment.

中文翻译：

---

氧化镍纳米粒子作为光催化剂在染料降解中的作用及其从水性环境中去除的有效参数的评估

摘要 这项工作的主要目的是研究在水溶液中可以有效地用氧化镍纳米粒子 (NiO-NPs) 光催化剂降解偶氮染料的因素。在半导体氧化物中，氧化镍由于具有很强的化学稳定性和高催化活性而被广泛用作环境友好型应用的光催化剂材料，以降解偶氮染料。在整个降解过程中，我们还检查了其他不同的因素，例如 pH 值、光源、光催化剂的量、染料的初始浓度、光强度、辐射时间、矿物离子的存在和溶剂类型。