CoAl2O4-g-C3N4 Nanocomposite Photocatalysts for Powerful Visible-Light-Driven Hydrogen Production

被引:19
作者
Basaleh, Amal [2 ]
Mahmoud, M. H. H. [1 ]
机构
[1] Taif Univ, Coll Sci, Dept Chem, At Taif 21944, Saudi Arabia
[2] King Abdulaziz Univ, Fac Sci, Dept Chem, Jeddah 21589, Saudi Arabia
关键词
HYBRID PHOTOCATALYST; OPTICAL-PROPERTIES; ESCHERICHIA-COLI; G-C3N4; HETEROJUNCTION; NANOSHEETS; SPINEL; ROUTE; WATER; PHOTODEGRADATION;
D O I
10.1021/acsomega.1c00872
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
There is no doubt that the rate of hydrogen production via the water splitting reaction is profoundly affected to a remarkable degree based on the isolation of photogenerated electrons from holes. The precipitation of any cocatalysts on the substrate surfaces (including semiconductor materials) provides significant hindrance to such reincorporation. In this regard, a graphite-like structure in the form of mesoporous g-C3N4 formed in the presence of a template of mesoporous silica has been synthesized via the known combustion method. Hence, the resulting g-C3N4 nanosheets were decorated with varying amounts of mesoporous CoAl2O4 nanoparticles (1.0-4.0%). The efficiencies of the photocatalytic H-2 production by CoAl2O4-doped g-C3N4 nanocomposites were studied and compared with those of pure CoAl2O4 and g-C3N4. Visible light irradiation was carried out in the presence of glycerol as a scavenger. The results showed that the noticeable photocatalytic enhancement rate was due to the presence of CoAl2O4 nanoparticles distributed on the g-C3N4 surface. The 3.0% CoAl2O4-g-C3N4 nanocomposite had the optimum concentration. This photocatalyst showed extremely high photocatalytic activities that were up to 22 and 45 times greater than those of CoAl2O4 and g-C3N4, respectively. This photocatalyst also showed 5 times higher photocatalytic stability than that of CoAl2O4 or g-C3N4. The presence of CoAl2O4 nanoparticles as a cocatalyst increased both the efficiency and productivity of the CoAl2O4-g-C3N4 photocatalyst. This outcome was attributed to the mesostructures being efficient charge separation carriers with narrow band gaps and high surface areas, which were due to the presence of CoAl2O4.
引用
收藏
页码:10428 / 10436
页数:9
相关论文
共 51 条
[1]   Pt-decorated ZnMn2O4 nanorods for effective photocatalytic reduction of CO2 into methanol under visible light [J].
Alhaddad, Maha ;
Shawky, Ahmed .
CERAMICS INTERNATIONAL, 2021, 47 (07) :9763-9770
[2]   Bi2O3/g-C3N4 nanocomposites as proficient photocatalysts for hydrogen generation from aqueous glycerol solutions beneath visible light [J].
Alhaddad, Maha ;
Navarro, R. M. ;
Hussein, M. A. ;
Mohamed, R. M. .
CERAMICS INTERNATIONAL, 2020, 46 (16) :24873-24881
[3]   Superior photooxidative desulfurization of thiophene by reduced graphene oxide-supported MoS2 nanoflakes under visible light [J].
Alhaddad, Maha ;
Shawky, Ahmed .
FUEL PROCESSING TECHNOLOGY, 2020, 205
[4]   Lattice strain estimation for CoAl2O4 nano particles using Williamson-Hall analysis [J].
Aly, Kamal A. ;
Khalil, N. M. ;
Algamal, Yousif ;
Saleem, Qaid M. A. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 676 :606-612
[5]   Controlled synthesis of blue spherical CoAl2O4 pigment powder in Pickering emulsion assisted with a hydrothermal process [J].
Chang, Ying ;
Feng, Ting ;
Wu, Chonggang ;
Chen, Yuan ;
Ke, Kai ;
Liu, Yang ;
Wang, Huihu ;
Dong, Shijie .
ADVANCED POWDER TECHNOLOGY, 2018, 29 (05) :1222-1229
[6]   Facile synthesis and enhanced photocatalytic H2-evolution performance of NiS2-modified g-C3N4 photocatalysts [J].
Chen, Feng ;
Yang, Hui ;
Wang, Xuefei ;
Yu, Huogen .
CHINESE JOURNAL OF CATALYSIS, 2017, 38 (02) :296-304
[7]   Synthesis and characteristics of nanorods of gadolinium hydroxide and gadolinium oxide [J].
Chen, Feng ;
Zhang, Xiao Hong ;
Hu, Xiao Dan ;
Zhang, Wei ;
Zeng, Rong ;
Liu, Pei Dang ;
Zhang, Hai Qian .
JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 664 :311-316
[8]   In-situ reduction synthesis of nano-sized Cu2O particles modifying g-C3N4 for enhanced photocatalytic hydrogen production [J].
Chen, Jie ;
Shen, Shaohua ;
Guo, Penghui ;
Wang, Meng ;
Wu, Po ;
Wang, Xixi ;
Guo, Liejin .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2014, 152 :335-341
[9]   Post-activation of in situ B-F codoped g-C3N4 for enhanced photocatalytic H2 evolution [J].
Cui, Yanjuan ;
Wang, Hao ;
Yang, Chuanfeng ;
Li, Ming ;
Zhao, Yimeng ;
Chen, Fangyan .
APPLIED SURFACE SCIENCE, 2018, 441 :621-630
[10]   Graphitic carbon nitride-based nanocomposites as visible-light driven photocatalysts for environmental purification [J].
Ding, Fei ;
Yang, Dong ;
Tong, Zhenwei ;
Nan, Yanhu ;
Wang, Yujie ;
Zou, Xiaoyan ;
Jiang, Zhongyi .
ENVIRONMENTAL SCIENCE-NANO, 2017, 4 (07) :1455-1469