CO₂的捕集与光催化转化技术因具有节能、绿色环保等优势，有望成为解决CO₂排放和太阳燃料循环利用的有效途径之一，高效光催化剂结构设计与制备是这一技术获得突破的关键。目前，制约光催化剂发展的关键问题是转化效率低和成本高等问题。Ti/Li/Al-LDHs@活性炭系列光催化剂是一种集CO₂捕集与光催化转化一体化双功能催化剂，其中Ti₁Li₃Al₂-LDHs@氧化生物质活性炭(Ti₁Li₃Al₂-LDHs@OBAC)在光催化CO₂水还原制备CO和CH₄表现出良好催化活性。但该催化剂的结构与稳定性关系和动力学仍不清楚，影响其改进及应用。因此，本文针对上述问题，设计制备系列元素组成不同的二元和三元Ti/Li/Al-LDHs，研究Ti₁Li₃Al₂-LDHs层板结构；在自制的固定床光催化反应装置上，探讨Ti₁Li₃Al₂-LDHs@OBAC组成结构与光催化反应性的关系，以及光催化反应动力学及其长周期稳定性。

CO₂ capture and photocatalytic conversion technology is expected to become one of the effective ways to solve CO₂ emissions and solar fuel recycling because of its advantages of energy saving and environmental protection. The design and preparation of efficient photocatalyst structure is the key to breakthroughs in this technology. At present, the key problems restricting the development of photocatalysts are low conversion efficiency and high cost. Ti/Li/Al-LDHs@activated carbon series photocatalyst is a kind of dual-function catalyst integrating CO₂ capture and photocatalytic conversion. Among them, Ti₁Li₃Al₂-LDHs/oxidized biomass activated carbon (Ti₁Li₃Al₂-LDHs@OBAC) in photocatalytic CO₂ water the reduction of CO and CH₄ showed good catalytic activity. However, the structure and stability relationship and kinetics of the catalyst are still unclear, affecting its improvement and application. In view of the above problems, this paper designed and prepared a series of binary and ternary Ti/Li/Al-LDHs with different elemental compositions to analyze and study the structure of Ti₁Li₃Al₂-LDHs laminates; on the self-made fixed-bed photocatalytic reaction device, we discussed The relationship between Ti₁Li₃Al₂-LDHs@OBAC composition structure and photocatalytic reactivity, as well as photocatalytic reaction kinetics and long-term stability.