TY - JOUR
T1 - Promoting visible-light photocatalytic activities for carbon nitride based 0D/2D/2D hybrid system: Beyond the conventional 4-electron mechanism
AU - Raziq, Fazal
AU - He, Jingxuan
AU - Gan, Jiantuo
AU - Humayun, Muhammad
AU - Faheem, M. Bilal
AU - Iqbal, Atef
AU - Hayat, Asif
AU - Fazal, Saima
AU - Yi, Jiabao
AU - Zhao, Yang
AU - Dhanabalan, K.
AU - Wu, Xiaoqiang
AU - Mavlonov, Abdurashid
AU - Ali, Tariq
AU - Hassan, Fakhrul
AU - Xiang, Xia
AU - Zu, Xiaotao
AU - Shen, Huahai
AU - Li, Sean
AU - Qiao, Liang
N1 - Generated from Scopus record by KAUST IRTS on 2023-09-21
PY - 2020/8/5
Y1 - 2020/8/5
N2 - 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.
AB - 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.
UR - https://linkinghub.elsevier.com/retrieve/pii/S092633732030285X
UR - http://www.scopus.com/inward/record.url?scp=85082465295&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2020.118870
DO - 10.1016/j.apcatb.2020.118870
M3 - Article
SN - 0926-3373
VL - 270
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -
