Amino‐Assisted Anchoring of CsPbBr₃ Perovskite Quantum Dots on Porous g‐C₃N₄ for Enhanced Photocatalytic CO₂ Reduction

Abstract

Halide perovskite quantum dots (QDs) have great potential in photocatalytic applications if their low charge transportation efficiency and chemical instability can be overcome. To circumvent these obstacles, we anchored CsPbBr QDs (CPB) on NH -rich porous g-C N nanosheets (PCN) to construct the composite photocatalysts via N-Br chemical bonding. The 20 CPB-PCN (20 wt % of QDs) photocatalyst exhibits good stability and an outstanding yield of 149 μmol h g in acetonitrile/water for photocatalytic reduction of CO to CO under visible light irradiation, which is around 15 times higher than that of CsPbBr QDs. This study opens up new possibilities of using halide perovskite QDs for photocatalytic application.

Graphitic Carbon Nitride with Dopant Induced Charge Localization for Enhanced Photoreduction of CO2 to CH4

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has become a star in water splitting [3][4][5][6][7] and CO 2 reduction. [8][9][10] Although many studies have been widely carried out, its CO 2 reduction performance is still far from the actual application requirements and the product is mainly CO (2-electron reduction product), [11,12] due to the high recombination rate of charge carriers and low reaction dynamics. [13][14][15][16] It is well known that electrons are generally excited from N atoms to C atoms in g-C 3 N 4 .

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

“…[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. [24][25][26][27][28][29][30][31][32][33] In photocatalytic CO 2 reduction, LHP QDs have been demonstrated to be capable of converting CO 2 into CO and CH 4 . [24][25][26][27][28][29][30][31][32][33] In photocatalytic CO 2 reduction, LHP QDs have been demonstrated to be capable of converting CO 2 into CO and CH 4 .…”

“…[21][22][23] Most recently,L HP quantum dots (QDs) have also been actively pursued as catalysts in photocatalytic fields. [27] Loading LHP QDs on graphene oxide [26] or g-C 3 N 4 [24] can facilitate the charge separation, bringing forth improved catalytic performance for CO 2 reduction. [27] Loading LHP QDs on graphene oxide [26] or g-C 3 N 4 [24] can facilitate the charge separation, bringing forth improved catalytic performance for CO 2 reduction.…”

Isolated Square‐Planar Copper Center in Boron Imidazolate Nanocages for Photocatalytic Reduction of CO2 to CO

“…Thee mission of photosensitizer in aqueous solution follows one exponential decay with al ifetime of 271 ns.A no bvious decay of the singlet excited state is observed when adding BIF-29 to the solution ( Figure S12c). [19] Theh igh performance of BIF-29 for photocatalytic CO 2 reduction could be attributed to the presence of unsaturated coordinated Cu sites of the catalyst. Thes hortened lifetime reveals the rapid transfer of photogenerated electron from [Ru(bpy) 3 ]Cl 2 to BIF-29, and thereby suppresses the recombination of photogenerated electron and hole pair.…”