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A Graphitic-C3N4 "Seaweed" Architecture for Enhanced Hydrogen Evolution

Han, Qing ; Wang, Bing ; Zhao, Yang ; Hu, Chuangang ; Qu, Liangti

Angewandte Chemie (International ed.), 2015-09, Vol.54 (39), p.11433-11437 [Periódico revisado por pares]

Weinheim: WILEY-VCH Verlag

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  • Título:
    A Graphitic-C3N4 "Seaweed" Architecture for Enhanced Hydrogen Evolution
  • Autor: Han, Qing ; Wang, Bing ; Zhao, Yang ; Hu, Chuangang ; Qu, Liangti
  • Assuntos: Algae ; Carbon nitride ; Catalysts ; Drying ; Evolution ; g-C3N4 "seaweed" ; Hydrogen ; Hydrogen evolution ; Hydrothermal treatment ; Nanofibers ; photocatalysis ; Quantum efficiency ; Seaweeds ; self-assembly ; template-free ; Water splitting
  • É parte de: Angewandte Chemie (International ed.), 2015-09, Vol.54 (39), p.11433-11437
  • Notas: We thank the financial support from the 973 program of China (2011CB013000) and NSFC (21325415, 21174019), Beijing Natural Science Foundation (2152028) and 111 Project 807012.
    111 Project - No. 807012
    istex:CF6A048095F39AFEAA8360B9904A65B07B296132
    NSFC - No. 21325415; No. 21174019
    Beijing Natural Science Foundation - No. 2152028
    973 program of China - No. 2011CB013000
    ark:/67375/WNG-X86G595M-D
    ArticleID:ANIE201504985
  • Descrição: A seaweed‐like graphitic‐C3N4 (g‐C3N4 “seaweed”) architecture has been prepared by direct calcination of the freeze‐drying‐assembled, hydrothermally treated dicyandiamide fiber network. The seaweed network of mesoporous g‐C3N4 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‐C3N4 bulk counterpart), and a remarkable apparent quantum efficiency of 7.8 % at 420 nm, better than most of the g‐C3N4 nanostructures reported. This work presents a very simple method for designing and developing high‐performance catalysts for hydrogen evolution. Weeding out hydrogen: A straightforward template‐free freeze‐drying method affords a graphitic‐C3N4 “seaweed” architecture of one‐dimensional mesoporous fibers. This seaweed architecture has a highly efficient photocatalytic activity for hydrogen evolution from water under visible‐light irradiation that is better than most reported nanostructured g‐C3N4 catalysts.
  • Editor: Weinheim: WILEY-VCH Verlag
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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