Cerium (Ce³⁺) doped TiO₂ powder was synthesized by a sol-gel method and characterized by Transmission Electron Microscope (TEM), X-ray Diffraction (XRD), UV–Vis Diffuse Reflectance Spectroscopy (UV-DRS), Fourier Transform Infrared Spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The Ce³⁺ doping strongly reduced the band gap of the TiO₂ from 3.2 eV (UV) to 2.7 eV (visible region). The photocatalytic activity of Ce³⁺ doped TiO₂ catalysts was evaluated by hydrogen production from sulphide wastewater under visible light illumination. The photocatalytic production of H₂ was studied in a batch recycle tubular photocatalytic reactor. The results show that 0.4% Ce³⁺–TiO₂ suspended in 500 mL of simulated sulphide wastewater irradiated at 150 W visible lamp produced maximum H₂ of 6789 μmol h⁻¹. It was noticed that the Ce³⁺ doped TiO₂ performs well than Nano TiO₂ and P25 TiO₂ photocatalysts.

铈（Ce ³⁺）掺杂的TiO ₂粉末是通过溶胶-凝胶法合成的，并通过透射电子显微镜（TEM），X射线衍射（XRD），UV-Vis漫反射光谱（UV-DRS），傅里叶变换进行了表征。红外光谱（FT-IR）和X射线光电子能谱（XPS）。Ce ³⁺掺杂将TiO ₂的带隙从3.2 eV（UV）强烈降低到2.7 eV（可见区）。通过在可见光照射下从硫化物废水中制氢来评估Ce ³⁺掺杂的TiO ₂催化剂的光催化活性。H ₂的光催化生产在间歇循环管式光催化反应器中进行了研究。结果表明，悬浮在500 mL模拟硫化物废水中的0.4％Ce ³⁺ –TiO ₂悬浮在150 W可见灯下，产生的最大H ₂为6789μmolh ^-1。注意到，Ce ³⁺掺杂的TiO _2的性能优于纳米TiO ₂和P25 TiO _2的光催化剂。