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Rational engineering active sites and vantage defects of catalysts are promising but grand challenging task to enhance photoreduction CO2 to high value‐added C2 products. In this study, we designed an N,S‐codoped Fe‐based MIL‐88B catalyst with well‐defined bipyramidal hexagonal prism morphology via a facile and effective process, which was synthesized by addition of appropriate 1,2‐benzisothiazolin‐3‐one (BIT) and acetic acid to the reaction solution. Under simulated solar irradiation, the designed catalyst exhibits high C2H4 evolution yield of 17.7 μmol g−1⋅h, which has been rarely achieved in photocatalytic CO2 reduction process. The synergistic effect of Fe‐N coordinated sites and reasonable defects in the N,S‐codoped photocatalyst can accelerate the migration of photogenerated carriers, resulting in high electron density, and this in turn helps to facilitate the formation and dimerization of C−C coupling intermediates for C2H4 effectively. [ABSTRACT FROM AUTHOR]

Rational engineering active sites and vantage defects of catalysts are promising but grand challenging task to enhance photoreduction CO2 to high value‐added C2 products. In this study, we designed an N,S‐codoped Fe‐based MIL‐88B catalyst with well‐defined bipyramidal hexagonal prism morphology via a facile and effective process, which was synthesized by addition of appropriate 1,2‐benzisothiazolin‐3‐one (BIT) and acetic acid to the reaction solution. Under simulated solar irradiation, the designed catalyst exhibits high C2H4 evolution yield of 17.7 μmol g−1⋅h, which has been rarely achieved in photocatalytic CO2 reduction process. The synergistic effect of Fe‐N coordinated sites and reasonable defects in the N,S‐codoped photocatalyst can accelerate the migration of photogenerated carriers, resulting in high electron density, and this in turn helps to facilitate the formation and dimerization of C−C coupling intermediates for C2H4 effectively. [ABSTRACT FROM AUTHOR]

Photocatalytic reduction of CO2 has drawn much attention as a promising way that can effectively alleviate the issue of global warming and energy crisis. In this work, we fabricated a series of CdS/NH2‐UiO‐66 composites with varied CdS amounts and tested their capacity for photocatalytic reduction of CO2. The reactions were performed in a solvent‐free system and displayed excellent selectivity for CO production without liquid phase products. When the content of CdS in the composite is up to 40 %, the hybrid catalyst produces 105.41 μmol/g within 6 h, exhibiting remarkable photocatalytic performance, which is much higher than that catalyzed by mechanically mixed CdS and NH2‐UiO‐66. The brilliant catalytic performance of the composite catalyst is attributed to the formation of heterostructure between the well‐dispersed CdS and NH2‐UiO‐66, which promotes the enhancement of electron transfer during photocatalysis. [ABSTRACT FROM AUTHOR]

Conversion of carbon dioxide (CO2) into useful chemicals is an important and urgent task from the energy and environment perspective. Herein, through a post-synthetic modification (PSM) approach, we synthesized three new metal–organic frameworks (MOFs) UiO-68-PSMs with different functional groups, namely, UiO-68-F, UiO-68-CH3 and UiO-68-OCH3, for the photocatalytic reduction of CO2. By introducing electron-withdrawing and electron-donating groups, UiO-68-PSMs showed different performance for the selective photocatalytic reduction of CO2 to CO because of change in charge separation and band gap of UiO caused by the presence of different functional groups. [ABSTRACT FROM AUTHOR]

Abstract NbO-type MOF nano/microcrystals were facilely achieved by tuning the volume ratio of DMF and H 2 O mixed solvent under solvothermal conditions. It was found that NOTT-102 rhombohedral sample obtained with DMF:H 2 O volume ratio of 15:5 has the largest BET surface area (3006 m2 g−1), compared to the samples with the DMF:H 2 O volume ratio of 12:8 (2263 m2 g−1) and 20:0 (1962 m2 g−1) as well as the bulk NOTT-102, namely [Cu 2 (QPTC)] (H 4 QPTC = [1,1':4′,1″:4″,1‴-quaterphenyl]-3,3‴,5,5‴-tetracarboxylic acid), crystals (2942 m2 g−1). Furthermore, dye adsorption results indicate that NOTT-102 rhombohedral sample exhibits superior adsorption capacity (850 mg g−1) and adsorption selectivity for methylene blue (MB) in contrast to methyl orange, rhodamine B, and acid chrome blue K dyes, which may be one of the promising candidates for potential application in removal of organic dyes from aqueous solution. Graphical abstract Image 1 Highlights • NbO-type MOF nano/microcrystals were facilely achieved by tuning the volume ratio of DMF and H 2 O. • NOTT-102 rhombohedral sample has the largest BET surface area compared to the other NOTT-102 nano/microcrystals. • NOTT-102 rhombohedral sample exhibits excellent adsorption capacity and selectivity for MB. [ABSTRACT FROM AUTHOR]

Micro/nanoscale Mg-MOF-74 materials with different morphologies and sizes have been fabricated in the presence of polyvinylpyrrolidone (PVP) by adjusting the amount of aqueous ammonia and reaction temperature. The obtained samples were characterized by powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and it was found that the Mg-MOF-74 particles show morphology and size dependent adsorption properties. The selectivity factors of the Mg-MOF-74 particles at 273 K were calculated based on the experimental single-component isotherms by ideal adsorbed solution theory (IAST). The results indicate that the Mg-MOF-74 particles have intrinsic high selectivity for adsorption of CO 2 over CH 4 and N 2 . [ABSTRACT FROM AUTHOR]