石油化工等行业是VOCs和CO2主要产排源，“碳中和”压力巨大。光催化

石油化工等行业是VOCs和CO2主要产排源，“碳中和”压力巨大。光催化既能将VOCs降解为CO2和H2O，又能将CO2或VOCs降解物转化为CO和CH4等气体燃料，有望实现碳循环。本项目采用催化效率更高的光电催化方式，以金属纳米颗粒修饰的TiO2纳米管作为光电催化材料，以固态电解质抑制析氢反应，以苯系物BTEX模拟工业VOCs，并构建一个集多种气体组分于一体、空穴受体与电子受体共存、可以实现碳循环的具有“BTEX(g)-CO2光电催化反应耦合效应”的气-固界面反应体系，解决传统液-固界面光催化存在的CO2需经溶液吸收、产物不易检测、析氢严重、催化效率低等问题。通过纳米管微环境表征、气源及光电催化条件调控、气相色谱及电化学检测、动力学模型分析及DFT模拟计算，研究并阐明BTEX(g)-CO2在气-固界面中的光电催化反应耦合机理、光电催化动力学理论及碳循环过程可控性等关键问题，为温室气体转化气体燃料并同步降解挥发性有机污染物提供理论依据，丰富和发展碳循环与碳中和理论，并为其它气-固界面催化研究提供借鉴。

Petrochemical and other industries are the main production and emission sources of VOCs and CO2, and the pressure of "carbon neutralization" is huge. Photocatalysis can not only degrade VOCs into CO2 and H2O, but also convert CO2 or VOCs degradation products into gaseous fuels such as CO and CH4, which is expected to realize carbon cycle. In this project, the photocatalysis method with higher catalytic efficiency is adopted, the TiO2 nanotube modified by metal nanoparticles is used as the photocatalysis material, the hydrogen evolution reaction is inhibited by solid electrolyte, the benzene series BTEX is used to simulate industrial VOCs, and a system integrating multiple gas components, the coexistence of hole receptor and electron receptor is constructed The gas-solid interface reaction system with "BTEX (g) - CO2 photocatalytic reaction coupling effect" that can realize carbon cycle solves the problems existing in the traditional liquid-solid interface photocatalysis, such as CO2 needs to be absorbed by solution, products are not easy to detect, serious hydrogen evolution and low catalytic efficiency. Through the characterization of nanotube microenvironment, the regulation of gas source and photocatalytic conditions, gas chromatography and electrochemical detection, kinetic model analysis and DFT simulation calculation, the key problems such as the coupling mechanism of BTEX (g) - CO2 photocatalytic reaction in the gas-solid interface, the theory of photocatalytic kinetics and the controllability of carbon cycle process are studied and clarified, It provides a theoretical basis for the conversion of greenhouse gases into gaseous fuels and the simultaneous degradation of volatile organic pollutants, enriches and develops the theory of carbon cycle and carbon neutralization, and provides a reference for other research on gas-solid interface catalysis.

Chemicals and other industries are the main sources of VOCs and CO2, and the pressure of "carbon neutralization" is huge. Photocatalysis can not only degrade VOCs into CO2 and H2O, but also convert CO2 or VOCs degradation products into gaseous fuels such as CO and CH4, which is expected to realize carbon cycle. In this project, the photoelectrocatalysis method with higher catalytic efficiency is adopted, TiO2 nanotubes modified by metal nanoparticles are used as photoelectrocatalysis materials, solid electrolyte is used to inhibit hydrogen evolution reaction, BTEX is used to simulate industrial VOCs, and a gas-solid interface reaction system with BTEX(g)-CO2 photoelectrocatalysis reaction coupling effect which integrates various gas components and can realize carbon cycle is constructed, thus solving the traditional liquid-solid interface photocatalysis. Through the characterization of nanotube microenvironment, the regulation of gas source and photoelectrocatalysis conditions, gas chromatography and electrochemical detection, kinetic model analysis and DFT simulation calculation, the key issues of BTEX(g)-CO2 photoelectrocatalysis reaction coupling mechanism, photoelectrocatalysis kinetic theory and controllability of carbon cycle process at the gas-solid interface were studied and clarified, which provided theoretical basis for greenhouse gas to convert gas fuel and synchronously degrade volatile organic pollutants, enriched and developed the theory of carbon cycle and carbon neutralization, and provided other gas-solid interface catalysis research.