g‐C₃N₄‐SiC‐Pt for Enhanced Photocatalytic H₂ Production from Water under Visible Light Irradiation

Abstract

A green and environmentally‐friendly exploration of noble metals' load on photocatalysts for bio‐reduction sol‐deposition calcination is reported. The composite photocatalyst of g‐C3N4‐SiCPt achieves a high hydrogen evolution rate of 595.3 μmol h−1 g−1, 3.7‐ and 2.07‐fold higher than g‐C3N4‐bulk and g‐C3N4‐SiC, respectively, under visible‐light irradiation, with a quantum efficiency of 2.76% at 420 nm. More details can be found in article number http://doi.wiley.com/10.1002/ente.1900017 by Yanmei Zheng and co‐workers.

SiC Substrate/Pt Nanoparticle/Graphene Nanosheet Composite Photocatalysts for Hydrogen Generation

“…Figure e shows a comparison of the photocatalytic activity of SiC-based photocatalytic materials. First, the rate of pristine SiC photocatalyst’s hydrogen production was in the range of 2.68–11 μmol·g –1 ·h –1 , owing to the lack of active sites and the high recombination of charge–hole pairs of the pristine SiC photocatalyst. ,,, By doping SiC with the noble metal Pt, the hydrogen production rate has boosted at 204 μmol·g –1 ·h –1 . − Furthermore, by doping SiC with carbon materials, for instance, carbon nanowires, carbon nanotubes, graphene, carbon black, etc., the hydrogen production rate has sharply improved to 1328.4 μmol·g –1 ·h –1 . ,,,− In recent years, the hot photocatalytic material graphitic carbon nitride (g-C 3 N 4 ) and SiC form a composite photocatalyst, which can reach a hydrogen production rate of 595.3–2971 μmol·g –1 ·h –1 . − In the present work, SiC/Pt/graphene composite photocatalysts with stabilized heterojunctions between β-SiC, graphene, and Pt were prepared using the FJH process. Compared with the photocatalytic activity of pristine SiC, the SiC/Pt/graphene composite photocatalyst had a 175-fold increase achieving the maximum value of 2980 μmol·g –1 ·h –1 .…”