State‐of‐the‐Art Advancements in Photocatalytic Hydrogenation: Reaction Mechanism and Recent Progress in Metal‐Organic Framework (MOF)‐Based Catalysts

Abstract

Photocatalytic hydrogenation provides an effective alternative way for the synthesis of industrial chemicals to meet the economic and environment expectations. Especially, over the past few years, metal-organic frameworks (MOFs), featured with tunable structure, porosity, and crystallinity, have been significantly developed as many high-performance catalysts in the field of photocatalysis. In this review, the background and development of photocatalytic hydrogenation are systemically summarized. In particular, the comparison between photocatalysis and thermal catalysis, and the fundamental understanding of photohydrogenation, including reaction pathways, reducing species, regulation of selectivity, and critical parameters of light, are proposed. Moreover, this review highlights the advantages of MOFs-based photocatalysts in the area of photohydrogenation. Typical effective strategies for modifying MOFs-based composites to produce their advantages are concluded. The recent progress in the application of various types of MOFs-based photocatalysts for photohydrogenation of unsaturated organic chemicals and carbon dioxide (CO 2 ) is summarized and discussed in detail. Finally, a brief conclusion and personal perspective on current challenges and future developments of photocatalytic hydrogenation processes and MOFs-based photocatalysts are also highlighted.

Bromo- and iodo-bridged building units in metal-organic frameworks for enhanced carrier transport and CO2 photoreduction by water vapor

“…The performance is also higher than many benchmark metal-oxo MOFs with the identical organic linker ( e.g . UiO-66(Zr)-NH 2 and MIL-101(Fe)-NH 2 ) as well 13 , 31 .…”

Metal–organic framework (MOF)-5/CuO@ZnIn2S4core–shell Z-scheme tandem heterojunctions for improved charge separation and enhanced photocatalytic performance

“…5d. 52,53 The optical characterization of the prepared photocatalysts can be performed by UV-visible diffuse reflectance spectroscopy (DRS). As shown in the absorption spectra of several photocatalysts in Fig.…”

Novel easily separable core–shell Fe3O4/PVP/ZIF-8 nanostructure adsorbent: optimization of phosphorus removal from Fosfomycin pharmaceutical wastewater

“…[13][14][15][16][17][18] Recently, sustainable green nano adsorbents, 19 and sustainable photocatalytic membranes 20 have been used for water and wastewater remediation of pharmaceuticals. Metal-organic frameworks (MOFs) attracted large attention due to their applications in energy generation, 21 catalytic degradation, 22 gas storage, 23,24 gas/heavy metal adsorption, [25][26][27] chemical catalysis, 28 and environmental remediation. [29][30][31] Even though the bare MOFs can be used as adsorbents, nevertheless, certain disadvantages impede the removal efficiencies for pollutants due to weaker adsorption affinity resulting from their large amount of void space and the limited unsaturated metallic centers.…”