Semiconductor photocatalysis technology is one of the ways to control environmental pollution using solar energy. Because of its chemical stability, low toxicity and high photocatalytic oxidation-reduction ability, titanium dioxide has become one of the most widely studied and applied semiconductor photocatalytic materials. However, there are also some problems such as the response only in the ultraviolet range, rapid recombination of electron pairs produced by light during photodegradation, and the small specific surface area. On account of the limitations of titanium dioxide photocatalyst, the key factors and breakthroughs to improve performance new materials, this paper uses g-C₃N₄ of improving the photocatalytic function of titanium dioxide. Because g-C₃N₄ has good conductivity, relatively strong adsorption capacity and larger specific surface area compared with other carriers, g-C₃N₄ is one of the most promising carriers. In this research work, g-C₃N₄/TiO₂ heterogeneous nanocomposites were prepared by combining TiO₂ nanowires with g-C₃N₄. First of all, we need to change the morphology of titanium dioxide. We use high-voltage electrospinning technology to achieve this goal. This method greatly increases the specific surface area and increases the active sites involved in photocatalytic activity. Then, g-C₃N₄ was prepared with melamine as raw material by high temperature calcination. Then, the hydrothermal method combined with the good characteristics of g-C₃N₄ enhanced the deflection of photogenerated electrons and prolongs the lifetime of photogenerated electron-hole pairs. The photocatalytic efficiency of nanocomposites is greatly improved Rhodamine B solution was completely degraded in 120 min.

半导体光催化技术是利用太阳能控制环境污染的方法之一。由于其化学稳定性，低毒性和高的光催化氧化还原能力，二氧化钛已成为最广泛研究和应用的半导体光催化材料之一。然而，还存在一些问题，例如仅在紫外线范围内的响应，在光降解期间由光产生的电子对的快速重组以及比表面积小。鉴于二氧化钛光催化剂的局限性，提高新材料性能的关键因素和突破，本文采用gC ₃ N ₄来提高二氧化钛的光催化性能。因为gC ₃ N₄具有良好的导电性，相对强的吸附能力和与其它载体相比较大的比表面积，GC ₃ Ñ ₄是最有前途的载波中的一个。在这项研究工作中，通过将TiO ₂纳米线与gC ₃ N ₄结合，制备了gC ₃ N ₄ / TiO ₂异质纳米复合材料。首先，我们需要改变二氧化钛的形态。我们使用高压静电纺丝技术来实现这一目标。该方法大大增加了比表面积并增加了光催化活性所涉及的活性位。然后，gC ₃ N ₄以三聚氰胺为原料，经高温煅烧制得。然后，水热法与gC ₃ N ₄的良好特性相结合，增强了光生电子的偏转，并延长了光生电子-空穴对的寿命。纳米复合材料的光催化效率大大提高，若丹明B溶液在120分钟内完全降解。