Objectives: The present work aims at the synthesis of metal-doped and undoped titania photocatalysts for the degradation of methylene blue and neutral red dyes. Methods: Un-doped and metal-doped titania photocatalysts were synthesized by hydrothermal treatment, calcined at 673 K, and were evaluated by SEM, XRD, and XPS techniques for their phase composition. Results and conclusions: XPS studies of photo catalysts confirmed the presence of transition metal ions of Co, Ni, and Zn as dopants along with titania. XRD analysis indicated that all the synthesized photocatalysts were in the anatase phase. The morphology of prepared photocatalysts was confirmed through SEM analysis. The synthesized nanoparticle’s photocatalytic nature was examined through testing their degradation potentials of methylene blue and neutral red dyes under UV light irradiation. Under optimized conditions, like pH, contact time, initial dye concentration and catalyst amount metal-doped titania photocatalysts showed higher photodegradation efficiency than the pure parental material. Among the metal doped titania best results were obtained with Ni doped titania as 90% and 95% degradation were observed for neutral red and methylene blue dyes respectively. This photocatalyst can therefore be used successfully to degrade the selected dyes present in industrial effluents.

目的：本工作旨在合成金属掺杂和不掺杂的二氧化钛光催化剂，以降解亚甲基蓝和中性红染料。方法：通过水热处理合成未掺杂和金属掺杂的二氧化钛光催化剂，在673 K下煅烧，并用SEM，XRD和XPS技术对其相组成进行评估。结果与结论：XPS对光催化剂的研究证实了Co，Ni和Zn过渡金属离子与二氧化钛一起作为掺杂剂存在。XRD分析表明，所有合成的光催化剂均处于锐钛矿相。通过SEM分析确认了制备的光催化剂的形态。通过测试其在紫外光照射下的亚甲基蓝和中性红染料的降解潜力，来检查合成的纳米粒子的光催化性质。在优化的条件下，例如pH，接触时间，初始染料浓度和催化剂量，金属掺杂的二氧化钛光催化剂显示出比纯母体材料更高的光降解效率。在金属掺杂的二氧化钛中，使用镍掺杂的二氧化钛可获得最佳结果，因为观察到中性红和亚甲基蓝染料分别降解90％和95％。