Highly effective photoreduction of CO₂ to CO promoted by integration of CdS with molecular redox catalysts through metal–organic frameworks

Abstract

CdS/UiO-bpy/Co composites showed outstanding performance for photoreduction of CO2 to CO via integrating CdS with a Co complex through MOFs.

Encapsulating Perovskite Quantum Dots in Iron‐Based Metal–Organic Frameworks (MOFs) for Efficient Photocatalytic CO2 Reduction

“…While PCN-221(Fe 0.2 )becomes amorphous ( Figure S7), indicating it totally decomposes after the photocatalytic reaction. [48] To identify the electron source for the reduction of CO 2 to CO and CH 4 ,the H 2 18 Oisotope trace experiment was carried out in aC O 2 -saturated ethyl acetate/H 2 18 Os olution containing MAPbI 3 @PCN-221(Fe 0.2 )p hotocatalyst, and the major mass spectrum signal with a m/z value of 36 ( 18 O 2 )c an be observed ( Figure S8). [48] To identify the electron source for the reduction of CO 2 to CO and CH 4 ,the H 2 18 Oisotope trace experiment was carried out in aC O 2 -saturated ethyl acetate/H 2 18 Os olution containing MAPbI 3 @PCN-221(Fe 0.2 )p hotocatalyst, and the major mass spectrum signal with a m/z value of 36 ( 18 O 2 )c an be observed ( Figure S8).…”

“…[1][2][3][4][5][6] In the artificial photosynthesis process,acrucial challenge is to design efficient and low-cost catalysts and photosensitizers.I nt his context, as eries of efficient photocatalysts based on earth-abundant elements,s uch as Fe, [7][8][9] Co [10][11][12][13] and Ni [14,15] have been developed. [17][18][19][20] In this regard, lead halide perovskite (LHP) NCs are ordinarily endowed with high defect tolerance and long photogenerated carrier lifetime,t riggering their widespread applications in photovoltaic and optoelectronic devices. [17][18][19][20] In this regard, lead halide perovskite (LHP) NCs are ordinarily endowed with high defect tolerance and long photogenerated carrier lifetime,t riggering their widespread applications in photovoltaic and optoelectronic devices.…”

“…[16] Meanwhile,s ome semiconductor nanocrystals (NCs) have been pursued as photosensitizers,o wing to their large extinction coefficients and flexibly adjustable thermodynamic and optical properties with the regulation of particle sizes. [17][18][19][20] In this regard, lead halide perovskite (LHP) NCs are ordinarily endowed with high defect tolerance and long photogenerated carrier lifetime,t riggering their widespread applications in photovoltaic and optoelectronic devices. [21][22][23] Most recently,L HP quantum dots (QDs) have also been actively pursued as catalysts in photocatalytic fields.…”

Recent Innovation of Metal-Organic Frameworks for Carbon Dioxide Photocatalytic Reduction

“…However, the ternary composite based on CdS theoretically possesses artificial heterojunction, which will passivate the bulk-charge recombination subsequent to excitation and simultaneous increase of photoelectron-generation, giving an efficient ternary composite MOF capable of CO 2 photocatalytic reduction to CO with evolution rate of 235 µmol•g −1 •h −1 and 85% selectivity over H 2 (41 µmol•g −1 •h −1 ). Composite MOF was constructed by incorporation of CdS and molecular redox catalyst through UiO-bpy MOF to yield CdS/UiO-bpy/Co, with UiO-bpy used as a linker for inorganic semiconductor and redox catalyst, as reported by Chen et al [177].…”

Indium Phosphide Quantum Dots Integrated with Cadmium Sulfide Nanorods for Photocatalytic Carbon Dioxide Reduction

“…It has a narrow bandgap (~2.4 eV), and its conduction band edge position is more negative than the reduction potential of CO 2 . [4][5][6] However, the photoconversion efficiency of bare CdS is low due to its high charge carrier recombination rate and susceptibility to photocorrosion. [7][8][9][10] Loading the surface of CdS with another semiconductor or a cocatalyst to enhance photocatalytic activity has been a successful strategy.…”