TiO₂ nanowire‐nanoparticle hetero‐structured films were prepared via a sol–gel method and coated on glass substrates by dipping method for photocatalytic activity. In this study 0, 1, 3, and 5 mol% of Ni doped were studied. One‐dimensional TiO₂ nanowires (NWs) were prepared by hydrothermal treatment with TiO₂ nanoparticles (NPs) which are commercially available. XRD, FESEM, DRS, and XPS were used to characterize the prepared nanowire‐nanoparticle hetero‐structures films. 3%Ni doped TiO₂ hetero‐structured film (TNi3) had the highest photocatalytic activity on the degradation of methylene blue (MB). TNi3 films provided about 4.3 times of degradation rate compared to undoped TiO₂ (T). It revealed that TNi3 film resulted in shifting the absorption wavelength towards narrowing the energy band gap and small crystallite size. Therefore, the TNi3 film exhibited a photocatalytic activity on the degradation of MB under visible light irradiation greater than undoped film.

中文翻译：

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水热法和溶胶-凝胶法制备的掺Ni TiO2纳米线-纳米粒子异结构膜的光催化活性增强

TiO ₂纳米线-纳米粒子异质结构薄膜是通过溶胶-凝胶法制备的，并通过浸涂法将其涂覆在玻璃基板上以实现光催化活性。在这项研究中，研究了0、1、3和5 mol％的Ni掺杂。一维TiO ₂纳米线（NWs）是通过使用TiO ₂纳米颗粒（NPs）进行水热处理而制备的，而TiO ₂纳米线（NPs）可商购。XRD，FESEM，DRS和XPS用于表征制备的纳米线-纳米颗粒异质结构薄膜。3％Ni掺杂的TiO ₂异质结构膜（TNi3）对亚甲基蓝（MB）的降解具有最高的光催化活性。与未掺杂的TiO ₂相比，TNi3薄膜的降解率约为4.3倍（T）。结果表明，TNi3薄膜导致吸收波长向窄能带隙和小晶粒尺寸的方向偏移。因此，在可见光照射下，TNi3膜对MB的降解表现出的光催化活性大于未掺杂膜。