Carbon nitride with simultaneous porous network and O-doping for efficient solar-energy-driven hydrogen evolution
By Zhen‐Feng Huang, Jiajia Song, Lun Pan, Ziming Wang, Xueqiang Zhang, Jijun Zou, W. Mi, Xiangwen Zhang, Li Wang. 2015
604 citations recorded by the source corpus.
Abstract Efficient charge separation and broaden light absorption are of crucial importance for solar-driven hydrogen evolution reaction (HER), and graphitic carbon nitride (g-C 3 N 4 ) is a very promising photocatalyst for this reaction. Here we report a facile precursor pre-treatment method, by forming hydrogen bond-induced supramolecular aggregates, to fabricate g-C 3 N 4 with simultaneous novel porous network and controllable O-doping. Experimental and DFT computation identified that O doping preferentially occurs on two-coordinated N position, and the porous network and O-doping synergetically promote the light harvesting and charge separation. As a result, this material shows 6.1 and 3.1 times higher HER activity (with apparent quantum efficiency of 7.8% at 420 nm) than bulk and even 3D porous g-C 3 N 4 . This work highlights that simply pre-treating the precursor can not only control the architecture but also introduce helpful foreign atoms or monomer in the matrix, which provides a useful strategy to design and fabricate highly efficient g-C 3 N 4 photocatalyst.
Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/1bc4bfa217647e4ae0a725259757f6a7cb8fc090
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Citations in the corpus
- Recent developments of doped g-C3N4 photocatalysts for the degradation of organic pollutants (2020, background): “Usually, nonmetal introduction will break the symmetry of g-C3N4 and result faster separation speed of electron-hole pairs (Huang et al., 2015).”