Heteroatoms binary-doped hierarchical porous g-C3N4 nanobelts for remarkably enhanced visible-light-driven hydrogen evolution

By Jiaojiao Wu, Nan Li, Xiaohong Zhang, Huabin Fang, Yan‐Zhen Zheng, Xia Tao. Applied Catalysis B: Environmental, 2018

151 citations recorded by the source corpus.

Abstract The heteroatoms C, O binary-doped g-C3N4 (C-O/CN) with hierarchical porous nanobelt architecture was synthesized via a straightforward template-free self-assembly method using dicyandiamide as g-C3N4 precursor and glutathione as C, O doping source. The as-prepared C-O/CN exhibits well-defined hierarchical nanobelt structure composed of porous nanosheets, resulting in obvious enhanced specific surface area (120 m2 g−1). Particularly, C, O heteroatoms, introduced into the structure of g-C3N4 by substituting N atoms, induce narrowed bandgap for more effective visible-light harvesting and negatively shifted conduction band position for stronger reducibility of electrons for H2 production. Such hierarchical porous C-O/CN nanobelts are demonstrated to be highly efficient in charge separation and transfer. Under optimal mass ratio of glutathione to dicyandiamide (0.1%), C-O/CN-0.1 shows a highest H2 evolution rate of 18.38 mmol h−1 g−1 under visible-light (λ > 420 nm) irradiation (about 79.9 times higher than that of the bulk g-C3N4) and a remarkable apparent quantum efficiency of 9.83% at 420 nm, which can be used as a promising low-cost photocatalyst for H2 evolution.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/0cb44c6f954f58e38889ab3dd4a5307a55e8a0b8

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In Electrical and Electronic Engineering

1. Huaming Li
2. Hua Tang
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In Materials Chemistry

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In Renewable Energy, Sustainability and the Environment

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6. Jingsan Xu
7. Wei Liu
8. Xiaohui Yu

Citations in the corpus

• Unveiling the origin of boosted photocatalytic hydrogen evolution in simultaneously (S, P, O)-Codoped and exfoliated ultrathin g-C3N4 nanosheets (2019, background): “The majority of previous reports are focused on mono-element doping, however, the simultaneous doping of two kinds of non-metal atoms into g-C3N4 such as (P, S) co-doping [31], (P, Na) co-doping [32] and (C, O) co-doping [33] has been demonstrated to show higher photocatalytic activity and unusual p”