Molecularly Tunable Donor–Acceptor Integrated Carbon Nitride for Sunlight‐Driven H₂O₂ Synthesis: Mechanism and Performance Insights

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract Graphite phase carbon nitride (CN) emerges as a promising catalyst for sunlight‐driven H 2 O synthesis owing to its merits of stable physicochemical properties, distinctive electronic structure, adjustable bandgap, etc., yet poor charge behavior, especially high carrier recombination and low migration rate, limit photocatalytic activity. Herein, molecularly tunable donor‐acceptor (D‐A) integrated CN is fabricated via cytosine doping combined with molten salt‐assisted calcination. The utilized achieves the highest H₂O₂ yield 8.07 mmol g −1 h , which exceeds initial by factor 40.4, surpassing numerous reported CN‐based photocatalysts. Series characterizations/tests (e.g., transient absorption, steady‐state SPV spectra, KPFM) theoretical calculations HOMO/LUMO, adsorption energy) confirm that incorporation K + ‐C≡N pyrimidine ring disrupts symmetry establishes D‐A significantly augmenting separation photogenerated charges. capture experiment rotating disk electrode test affirm two‐step single electron oxygen reduction pathway occurs in process synthesis. This work offers novel approaches profound revelations development

Language: Английский

A comprehensive review of S-scheme heterojunction photocatalysts for CO2 reduction: Design principles, mechanisms, and material classification

Journal of CO2 Utilization, Journal Year: 2025, Volume and Issue: 95, P. 103087 - 103087

Published: April 19, 2025

Language: Английский

CuCo₂S₄/g-C₃N_4–x S-Scheme Heterojunction for Photothermal-Assisted Photocatalytic CO₂ Reduction

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 20, 2025

Photocatalytic conversion of CO2 into chemical fuels has emerged as a research hotspot, aiming to mitigate the rapid depletion fossil and alleviate global warming. However, inherent low carrier separation efficiency limited solar light utilization photocatalysts lead unsatisfactory efficiency. In this study, an appealing CuCo2S4/g-C3N4-x S-scheme heterostructure is successfully fabricated by simple polyol reflux method. Notably, nitrogen vacancies enhance Fermi level difference between CuCo2S4 g-C3N4-x, resulting in stronger interfacial built-in electric field. The full-spectrum strong optical absorption capability endows synthesized catalysts with superior light-harvesting property. photothermal effect-induced temperature increase accelerates cyclic process adsorption CO desorption on catalyst surface. Most importantly, charge transfer pathway ensures efficient photogenerated carriers. Thanks these synergistic benefits, exhibits exceptional photothermal-assisted photocatalytic reduction performance. Under simulated sunlight, average production rate reaches 24.64 μmol g-1 h-1, which 12.1 27.1 times higher than that g-C3N4 CuCo2S4, respectively. This study offers novel strategy for designing outstanding

Language: Английский