A 3D Hierarchical Pancake-Like Porous Carbon Nitride for Highly Enhanced Visible-Light Photocatalytic H2 Evolution

Content Provider	Semantic Scholar
Author	Qiu, Xiao-Bin Qiu, Lingfang Ma, Mengfan Hou, Yingying Duo, Shuwang
Copyright Year	2020
Abstract	Polymeric carbon nitride is a fascinating visible-light-response metal-free semiconductor photocatalyst in recent decades. Nevertheless, the photocatalytic H2 efficiency is unsatisfactory due to the insufficient visible-light harvesting capacity and low quantum yields caused by the bulky structure seriously limited its applications. To overcome these defects, in this research, a 3D hierarchical pancake-like porous carbon nitride (PPCN) was successfully fabricated by a facile bottom-up method. The as-prepared photocatalyst exhibit enlarged surface area, enriched reactive sites, improved charge carrier transformation and separation efficiency, and expanded bandgap with a more negative conduction band towardan enhanced reduction ability. All these features synergistically enhanced the photocatalytic H2 evolution efficiency of 3% Pt@PPCN (430 μmol g−1 h−1) under the visible light illumination (λ ≥ 420 nm), which was nine-fold higher than that of 3% Pt@bulk C3N4 (BCN) (45 μmol g−1 h−1). The improved structure and enhanced photoelectric properties were systematically investigated by different characterization techniques. This research may provide an insightful synthesis strategy for polymeric carbon nitride with excellent light-harvesting capacity and enhanced separation of charges toward remarkable photocatalytic H2 for water splitting.
Starting Page	77
Ending Page	77
Page Count	1
File Format	PDF HTM / HTML
DOI	10.3390/catal10010077
Volume Number	10
Alternate Webpage(s)	https://res.mdpi.com/d_attachment/catalysts/catalysts-10-00077/article_deploy/catalysts-10-00077.pdf
Alternate Webpage(s)	https://doi.org/10.3390/catal10010077
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article