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A Graphitic‐C 3 N 4 “Seaweed” Architecture for Enhanced Hydrogen Evolution
Author(s) -
Han Qing,
Wang Bing,
Zhao Yang,
Hu Chuangang,
Qu Liangti
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201504985
Subject(s) - calcination , mesoporous material , photocatalysis , nanofiber , catalysis , algae , materials science , chemical engineering , hydrogen , nanostructure , water splitting , nanotechnology , chemistry , organic chemistry , ecology , biology , engineering
Abstract A seaweed‐like graphitic‐C 3 N 4 (g‐C 3 N 4 “seaweed”) architecture has been prepared by direct calcination of the freeze‐drying‐assembled, hydrothermally treated dicyandiamide fiber network. The seaweed network of mesoporous g‐C 3 N 4 nanofibers is favorable for light harvesting, charge separation and utilization of active sites, and has highly efficient photocatalytic behavior for water splitting. It exhibits a high hydrogen‐evolution rate of 9900 μmol h −1 g −1 (thirty times higher than that of its g‐C 3 N 4 bulk counterpart), and a remarkable apparent quantum efficiency of 7.8 % at 420 nm, better than most of the g‐C 3 N 4 nanostructures reported. This work presents a very simple method for designing and developing high‐performance catalysts for hydrogen evolution.