This study was conducted to improve the photocatalytic performance of TiO₂ in the visible light range using TiO₂ based nanostructures. For this purpose, TiO₂ nanostructures were prepared by using the microwave-assisted technique and then used to prepare barium titanate (BaTiO₃), bismuth titanate (Bi₄Ti₃O₁₂), and zinc titanate (ZnTiO₃) nanostructures. The thermal, structural, purity, surface morphology, and optical studies were conducted through the TGA/DTA, XRD, EDX, FE-SEM, and UV–vis analyses. The crystallite sizes of TiO₂, bismuth titanate, barium titanate, and zinc titanate nanostructures were obtained 45, 32, 32, and 29 nm respectively. The optical band gap of prepared samples was evaluated at 3.65, 2.65, 2.80, and 3.80 eV, respectively. The photocatalytic activity of the perovskite nanostructures on methylene blue degradation was evaluated and the results showed that bismuth titanate nanostructures with smaller bandgap have higher photocatalytic activity among prepared samples in the visible light range.

进行这项研究以使用基于TiO ₂的纳米结构改善TiO ₂在可见光范围内的光催化性能。为此，利用微波辅助技术制备了TiO ₂纳米结构，然后用于制备钛酸钡（BaTiO ₃），钛酸铋（Bi ₄ Ti ₃ O ₁₂）和钛酸锌（ZnTiO ₃）纳米结构。通过TGA / DTA，XRD，EDX，FE-SEM和UV-vis分析进行了热，结构，纯度，表面形态和光学研究。TiO ₂的微晶尺寸分别获得45、32、32和29 nm的钛酸铋，钛酸钡和钛酸锌纳米结构。所制备样品的光学带隙分别评估为3.65、2.65、2.80和3.80 eV。评价了钙钛矿纳米结构对亚甲基蓝降解的光催化活性，结果表明，带隙较小的钛酸铋纳米结构在可见光范围内具有较高的光催化活性。