关键词: MOFs, 光催化CO₂转化, 配体调控, SBU工程, 缺陷工程, 形貌调控

Abstract:

Over the past decades, excessive CO₂ emissions have led to various environmental issues. Solar-driven photocatalytic conversion of CO₂ into valuable chemicals offers a promising solution for energy and environmental problems. Recently, a class of porous coordination polymers that self-assemble from organic linkers and metal ions or clusters, metal-organic frameworks (MOFs), have been widely explored for photoinduced CO₂ conversion because of their great CO₂ capture ability and adjustable structures. However, the development of MOFs with high efficiency for CO₂ conversion remains a significant challenge. In this review, we elaborate on four key engineering strategies for constructing efficient MOFs toward photocatalytic CO₂ reduction: ligand engineering, secondary building unit (SBU) engineering, defect engineering, and morphology engineering. These strategies focus on optimizing key structural properties of MOFs that critically influence their catalytic performance in CO₂ photoreduction, notably light absorption, CO₂ adsorption capacity, and charge separation and transport. The established design principles and modulation strategies demonstrate broad applicability and can be extended to guide the rational design of diverse MOF-based functional systems. Furthermore, we critically evaluate the advantages and disadvantages of each strategy, highlighting their specific contributions and inherent limitations. Finally, we outline the development prospects and identify promising future research directions for MOF-based photocatalytic CO₂ reduction.

Key words: MOFs, Photocatalytic CO₂ conversion, Ligand modulation, SBU engineering, Defective engineering, Morphology modulation