含氮臭气作为恶臭气体的典型代表，已经日益成为一个严重的社会问题和环保问题。本申请拟采用热聚合法在Ti3C2Tx2D结构上原位制备2D/2Dg-C3N4/Ti3C2Ty光催化剂，通过调整热处理温度以及碱处理进行g-C3Nx/Ti3C2Ty光催化剂的缺陷引入和离子掺杂，实现表面电子结构调控，并将其用于低浓度含氮臭气的光催化脱除。采用第一性原理计算模拟优化离子掺杂的2D/2Dg-C3Nx/Ti3C2Ty的几何结构和电子结构，结合实验表征确定掺杂方式、位置和形态。系统研究热处理温度、金属离子种类、掺杂量等工艺条件对2D/2D微观结构、g-C3Nx表面缺陷以及Ti3C2Ty表面基团的影响。采用原位IR光谱技术重点考察含氮臭气在催化剂表面吸附以及光催化降解的反应历程。揭示离子掺杂的2D/2Dg-C3Nx/Ti3C2Ty对含氮臭气光催化氧化降解机理及光催化性能提升机制，为其走向应用提供技术基础。

As a typical malodorous gas, nitrogen contained odors had became a serious social problem and environmental protection problem and brought great trouble to people's daily life. Aiming to solve this problem, we fabricate the 2D/2D g-C3N4 /Ti3C2Ty photocatalyst by in-situ thermal polymerization of g-C3N4 on the 2D structure of Ti3C2Tx. The defects of g-C3Nx and ion doping of g-C3Nx/Ti3C2Ty are carried out by adjusting the heat treatment temperature and alkali treatment to realize the regulation of surface electronic structure of photocatalysts. The prepared 2D/2D g-C3Nx/Ti3C2Ty is used for the photocatalytic removal of low-concentration nitrogen-contained odors. The doping mode, position and chemical state of the alkaline/alkaline-earth metal ions will be determined by the calculation of the geometry and electronic structure of ion doped 2D/2D g-c3nx /Ti3C2Ty using first principle method and experimental characterizations. The influence of technological conditions such as temperature, type of metal ion and doping amount on 2D/2D microstructure, g-C3Nx surface defects and Ti3C2Ty surface groups are systematically studied. In situ IR spectroscopy was used to investigate the adsorption and photocatalytic degradation performance of nitrogen contained odors on photocatalysts surface. Based on the perspectives of adsorption and desorption capacity of gas molecules, band structure, generation and transformation of photogenic carriers, and oxidation capacity, the mechanism of photocatalytic oxidation degradation of nitrogen contained odors by ion-doped 2D/2D g-C3Nx /Ti3C2Ty and the improvement mechanism of photocatalytic performance were revealed, which could provide technological basis for the future application.