Metal halide perovskites for photocatalytic CO2 reduction: An overview and prospects

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 482, P. 215076 - 215076

Published: Feb. 25, 2023

Language: Английский

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Two-dimensional interface engineering of g-C3N4/g-C3N4 nanohybrid: Synergy between isotype and p-n heterojunctions for highly efficient photocatalytic CO2 reduction

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 466, P. 143287 - 143287

Published: May 2, 2023

The creation of an isotype phase junction has been recognized as effective means improving the spatial charge separation and migration in g-C3N4 materials. Nevertheless, due to a lack electrostatic control internal electric field, heterojunction alone is incapable providing sufficient driving force maximize carrier transfer. Herein, we present interface engineering strategy for co-integrating p-n heterojunctions fabricate g-C3N4/g-C3N4 nanohybrids using facile ultrasonic-assisted self-assembly method. coherent boundary between two distinct phases demonstrates that intimate 2D interfacial contact can be easily established by π-π stacking interactions because their high structural similarities low lattice strain. Furthermore, compatible well-matched electronic band structures led staggered type II alignment lateral heterojunction, which confers resulting composite with strong redox ability, efficient exciton dissociation, desirable optoelectronic characteristics beyond those constituents. Essentially, work tandem create robust built-in allowing steering directional electron from BCN CNx. Benefiting these merits, BCN/CNx nanohybrid manifested remarkable CH4 generation photocatalytic CO2 reduction, outperforming its CNx counterparts 1.91 6.88-fold, respectively. midgap states induced nitrogen defects also pose positive effect on improved photoactivity binary acting reservoir mediate transfer further impede recombination. This proof-of-concept study highlights significance flow manipulation utilization enhancement.

Language: Английский

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Isolated Cu Sites in CdS Hollow Nanocubes with Doping-Location-Dependent Performance for Photocatalytic CO₂ Reduction

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(3), P. 1468 - 1479

Published: Jan. 13, 2024

Doping engineering has enabled the construction of homogeneous and abundant atomic-level catalytic sites for photocatalytic CO2 reduction with improved selectivity target product. However, little is known about effect spatial position heteroatoms on activity semiconductors toward reduction. Herein, uniform Cu doping into bulk phase hollow CdS cubes (HCC) onto surface HCC, denoted as Cu/HCC HCC@Cu, respectively, are prepared by tuning introduction order sources. Experimental analysis shows that both methods can promote separation migration photoinduced charge carriers in CdS. Notably, HCC@Cu leads to much better proton H2 production performance but lower efficiency compared bare In sharp contrast, enhances CO2-to-CO conversion while mitigating evolution. This should be ascribed smaller overpotential saturated system than Ar system. addition, atoms shifts d band center upward near Fermi energy level, which promotes adsorption activation These results indicate photoelectrons a prolonged lifetime preferably reduce molecules rather protons. The density functional theory (DFT) calculation show desorption CO*, adaptable sulfur vacancies (Vs) produced situ techniques stimulate formation CO* intermediates, resulting high CO. work reveals different heteroatom locations will provide reference design efficient photocatalysts fine structure.

Language: Английский

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An Efficient Intercalation Supramolecular Structure for Photocatalytic CO₂ Reduction to Ethylene Under Visible Light

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(42)

Published: June 27, 2023

Abstract Photocatalytic CO 2 reduction (CO PR) into multi‐carbon products (especially C H 4 ) is a highly attractive route for global carbon cycle, however, which seriously limited by sluggish C‐C coupling kinetics and competitive hydrogen evolution reaction (HER) so on. Herein, the fabrication of novel supramolecular assembly NiAl‐Fe‐TCPP reported intercalating iron porphyrin (Fe‐TCPP) NiAl‐layered double hydroxide (NiAl‐LDH), resultant exhibit superior catalytic performance on PR to under visible light irradiation in presence photosensitizer. A high selectivity up 93.4% carbon‐containing with production rate as 24.7 µmol h −1 can be achieved over NiAl‐Fe‐TCPP. The ex/in situ X–ray absorption spectoscopy (XAS) indicates that electron transfer between NiAl‐LDH Fe‐TCPP promote generation low‐valence Fe sites, resulting efficient . spin‐polarized density functional theory (DFT) calculations find synergistic mechanism molecules are activated then spilled coupled COCHO # , further reduced feasible perspective Gibbs free energy. Moreover, strong host‐guest interactions lead promoted photocatalytic activity cycle stability.

Language: Английский

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A critical review on layered double hydroxide (LDH)-derived functional nanomaterials as potential and sustainable photocatalysts

Sustainable Energy & Fuels, Journal Year: 2023, Volume and Issue: 7(5), P. 1145 - 1186

Published: Jan. 1, 2023

LDH derived heterostructure towards different photocatalytic application.

Language: Английский

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