With the increasing concerns for environmental pollution, photocatalysts have been attracting attention due to their environmentally friendly characteristics, low cost, and simple processing. Titanium dioxide (TiO₂) has been commonly used as a photocatalyst owing to its white pigment, excellent photocatalytic activity and low cost; however, its poor pollutant adsorption properties and high electron-hole recombination ratio limit its practical application. Transition metals such as nickel exhibit excellent electron-trapping capability, lowering the rate of electron-hole recombination and facilitating the generation of oxygen free radicals. One-dimensional nanofibers fabricated by electrospinning methods not only develop mesopores but can also make photocatalytic materials with a relatively high specific surface area, thereby increasing the adsorption of pollutants. In this study, transition metal-embedded TiO₂ was fabricated by an electrospinning method, and the influence of post-calcination in a reducing atmosphere on the photocatalytic activity was investigated. The photocatalytic properties were performed by decomposition of Rhodamine B under visible light irradiation using fabricated material. Among the investigated samples, Ni-embedded TiO₂ nanofibers showed the fastest decomposition of Rhodamine B under visible light irradiation due to a relatively high number of oxygen vacancies, lower Fermi level, small particle size, well-developed mesopores and relatively high specific surface area.

随着人们对环境污染的日益关注，光催化剂因其环境友好、成本低、加工简单等优点而备受关注。二氧化钛（TiO ₂)因其白色颜料、优异的光催化活性和低成本而被广泛用作光催化剂；然而，其较差的污染物吸附性能和较高的电子空穴复合率限制了其实际应用。过渡金属如镍表现出优异的电子俘获能力，降低电子-空穴复合率并促进氧自由基的产生。通过静电纺丝方法制备的一维纳米纤维不仅可以形成介孔，而且可以制造具有较高比表面积的光催化材料，从而增加对污染物的吸附。在本研究中，过渡金属嵌入的 TiO ₂用静电纺丝法制备，并研究了在还原气氛中后煅烧对光催化活性的影响。光催化性能是通过使用制造的材料在可见光照射下分解罗丹明 B 来实现的。在所研究的样品中，Ni 嵌入的 TiO ₂纳米纤维在可见光照射下表现出最快的罗丹明 B 分解，这是由于相对较多的氧空位、较低的费米能级、小粒径、发达的介孔和相对较高的比表面积.