As a photocatalyst with good prospects, TiO₂ has the shortcomings of easy agglomeration and no catalytic performance under visible light. The purpose of the present study was to help solve these problems by employing muscovite as a carrier for N-doped TiO₂ in a nanocomposite. The nanocomposites were prepared by a liquid precipitation-grinding method using muscovite as the matrix and urea as the nitrogen source. The crystal structures, chemical bonding, and micromorphology of the nanocomposites were analyzed by X-ray diffraction, infrared absorption spectrometry, and field emission scanning electron microscopy, respectively. Visible and ultraviolet (UV-Vis) light absorption of the nanocomposites was analyzed by solid ultraviolet diffuse reflectance spectroscopy. The photocatalytic effect of the nanocomposites was studied based on the degradation of rhodamine B (RhB) solution. The photocatalytic degradation product of RhB was detected by high-performance liquid chromatography-mass spectrometry, revealing that N-doping inhibits the growth of TiO₂ nanoparticles. The photocatalytic performance of N-TiO₂/muscovite composite nanomaterials decreased with increasing heat-treatment temperature. N-doped TiO₂/muscovite nanocomposites that were heated at 400°C showed the best photocatalytic performance under visible-light illumination with an RhB degradation of 97%.

TiO ₂作为一种具有良好前景的光催化剂，具有易团聚、在可见光下无催化性能的缺点。本研究的目的是通过采用白云母作为 N 掺杂 TiO ₂的载体来帮助解决这些问题。在纳米复合材料中。以白云母为基质，尿素为氮源，采用液体沉淀-研磨法制备纳米复合材料。分别通过X射线衍射、红外吸收光谱和场发射扫描电子显微镜分析了纳米复合材料的晶体结构、化学键和微观形貌。通过固体紫外漫反射光谱分析纳米复合材料的可见光和紫外 (UV-Vis) 光吸收。基于降解罗丹明B（RhB）溶液研究了纳米复合材料的光催化效果。高效液相色谱-质谱法检测到 RhB 的光催化降解产物，表明 N 掺杂抑制了 TiO ₂的生长纳米粒子。N-TiO ₂ /白云母复合纳米材料的光催化性能随着热处理温度的升高而降低。在 400°C 下加热的N 掺杂 TiO ₂ /白云母纳米复合材料在可见光照射下表现出最佳的光催化性能，RhB 降解率为 97%。