Conjugated Polyelectrolytes/Sucrose‐Doped Hydroxyl‐Rich Carbon Nitride Heterojunctions for Photocatalytic Hydrogen Evolution: Morphology Control, Interfacial Modulation, and Energy Band Engineering

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Abstract Herein, a novel, ecofriendly and facile strategy have been introduced to fabricate conjugated polyelectrolytes (CPEs)‐assisted hydroxylated CN (CNOH) heterojunctions for enhancing photocatalytic hydrogen evolution (PHE). This work synthesizes CNOH nanosheets utilizing urea‐sucrose aqueous solution as the precursor. Subsequently, this incorporates CPEs, including donor–donor (D–D) cationic polyelectrolyte (PFNBr) an anionic donor–acceptor (D–A) CPEs (PCP‐2F‐Li), respectively exfoliate CNOHx into folded, porous lamellar nanostructure with dispersed nanofragments on nanosheets, where PFNBr or PCP‐2F‐Li can be uniformly form type‐II y%PFN/CNOHx y%PCP/CNOHx heterojunctions. Optimally, 3%PFN/CNOH0.5 1%PCP/CNOH1 (1.5 wt% Pt) demonstrate PHE rates of 22.75 24.01 mmol g⁻¹ h⁻¹ under visible‐light irradiation (600 mW cm⁻ 2 ), outperforming that pristine bulk carbon nitride (BulkCN) by 13.87 14.64 times. The remarkable enhancement in performance is attributed well‐matched energy levels between CNOH, increased specific surface area facilitated CPEs‐promoted exfoliation, broadened visible light absorption due sucrose doping, strengthened interfacial interactions bonding π–π stacking, improved hydrophilicity conferred doping CNOH. presents novel design CPEs/CNOH effect, thus advancing development efficient sunlight‐driven chemical reactions.

Language: Английский

Vacancy-Mediated Oxygen Doping and Atomic-Level Interface Engineering Modulate Electron Transport Dynamics in Carbon Nitride: Multiscale Simulations and Experimental Synergy Unraveling Charge Transfer Mechanisms

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 106671 - 106671

Published: May 1, 2025

Language: Английский

g-C₃N₄ nanorods modified with N defects via the molten salt method: efficient photocatalysts for hydrogen production

Catalysis Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Alkali metal salts acted as morphology and structure modifying ligands to form g-C 3 N 4 nanorods with defects. The control defect engineering endowed the modified catalysts excellent photocatalytic hydrogen production performance.

Language: Английский