- Title
- Promoting visible-light photocatalytic activities for carbon nitride based 0D/2D/2D hybrid system: beyond the conventional 4-electron mechanism
- Creator
- Raziq, Fazal; He, Jingxuan; Gan, Jiantuo; Humayun, Muhammad; Faheem, M. Bilal; Iqbal, Atef; Hayat, Asif; Fazal, Saima; Yi, Jiabao; Zhao, Yang; Dhanabalan, K.; Wu, Xiaoqiang; Mavlonov, Abdurashid; Ali, Tariq; Hassan, Fakhrul; Xiang, Xia; Zu, Xiaotao; Shen, Huahai; Li, Sean; Qiao, Liang
- Relation
- ARC.FT160100205 http://purl.org/au-research/grants/arc/FT160100205
- Relation
- Applied Catalysis B: Environmental Vol. 270, Issue 5 August 2020, no. 118870
- Publisher Link
- http://dx.doi.org/10.1016/j.apcatb.2020.118870
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2020
- Description
- Photocatalysis is regarded as one of promising technology for future clean and sustaniable energy applications. Herein, we have fabricated Au-modified reduced graphene oxide coupled with carbon nitride (Au/rGO/g-C3N4) as novel 0D/2D/2D photocatalytic nanocomposites. The optimized sample 2Au/0.6rGO/g-C3N4 exhibits exceptional visible-light activity for water splititng and CO2 reduction with quantum efficiency of 3.82 % and 1.98 %, respectively. Electrochemistry and ultraviolent photoemission are combined to determine the band alignments and elaborate associated water splitting path-way mechanism. It is validated that due to intrinsic deep valence band position of g-C3N4, the obtained nanocomposites exhibit unusual two-step two-electron way of water oxidization through intermediate H2O2 catalyzed by rGO addition. The exceptional photoactivities are attributed to dual functions of enhanced charge separation and two-electron water oxidization facilitated by rGO and surface plasmon effect of decorated Au. Our work provides illuminations for low cost and high efficiency photocatalytic water splitting and CO2 reduction applications.
- Subject
- g-C3N4; electron mediator; surface plasmon resonance; CO2 conversion; overall water splitting; SDG 13; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1447644
- Identifier
- uon:43207
- Identifier
- ISSN:0926-3373
- Language
- eng
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