AUTHOR=Zhang Wen-Dong , Wang Yun , Liang Yi , Jiang Ai-Lin , Gong Hao , Tian Xiao-Ying , Fu Wen-Sheng , Liao Jia-Zhen , Chen Peng , Ma Ying-Zhao TITLE=High selectivity of photocatalytic reduction of CO2 to CO based on terpyridine ligand supported CuI metal organic framework JOURNAL=Frontiers in Chemistry VOLUME=10 YEAR=2022 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2022.974907 DOI=10.3389/fchem.2022.974907 ISSN=2296-2646 ABSTRACT=

In this work, a 4’-(4-cynaophenyl)-4,2’:6′,4-terpyridine supported Cu^I MOFs photocatalyst (Cu^IMOF) was applied to the photocatalytic CO₂ reduction for the first time. The micro-structural and physicochemical properties of the Cu^IMOF were systematically studied by the powder X-ray diffraction (PXRD), Single crystal X-ray diffraction (SCXRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR), UV-Vis diffuse spectroscopy (UV-vis DRS), ns-level photoluminescence spectra (ns-level PL), Ultraviolet photoelectron spectroscopy (UPS), and N₂ adsorption-desorption test (BET-BJH). Moreover, the in situ diffuse reflectance infrared fourier transform spectroscopy (in situ DRIFTS) was applied to investigate the adsorption and reaction intermediates of photocatalytic CO₂ reduction. As a result, Cu^IMOF exhibited good performance and outstanding selectivity toward photocatalytic reduction of CO₂ to CO under full-spectrum and visible light illumination. Notably, 100% selective photocatalytic conversion of CO₂ to CO was achieved. Thus, the study presents the high selectivity and CO₂ reduction efficiency of Cu^IMOF as a potential family of photocatalysts.