Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 23, Issue 2, Pages 145-155Publisher
ELSEVIER
DOI: 10.1016/S2095-4956(14)60129-7
Keywords
graphene; CdS; photocatalytic selective reduction; nitro compounds; visible light; water
Funding
- National Natural Science Foundation of China (NSFC) [21173045, 20903023]
- Award Program for Minjiang Scholar Professorship
- Natural Science Foundation (NSF) of Fujian Province [2012J06003]
- Program for Changjiang Scholars and Innovative Research Team in Universities [PCSIRT0818]
- Program for Returned High-Level Overseas Chinese Scholars of Fujian province
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
Ask authors/readers for more resources
Graphene (GR)-CdS nanocomposites with different weight addition ratios of GR have been assembled by a facile solvothermal treatment. The GR-CdS nanocomposite photocatalyst with an appropriate ratio of GR exhibits enhanced photoactivity for selective reduction of aromatic nitro compounds to the corresponding aromatic amines in water under visible light irradiation as compared with blank-CdS. The characterization of GR-CdS nanocomposite photocatalysts by a collection of techniques discloses that: i) GR can tune the microscopic morphology of CdS nanoparticles and improve light absorption intensity in the visible light region; ii) GR scaffolds act as an electron reservoir to trap and shuttle the electrons photogenerated from CdS semiconductor under the visible light illumination; iii) the introduction of GR enhances the adsorption capacity of GR-CdS nanocomposites toward the substrates, aromatic nitro compounds. The synergistic effect of these factors should account for the photoactivity advancement of GR-CdS nanocomposites toward the probe reactions. Furthermore, because the photogenerated holes in the system are trapped by the quenching agent ammonium oxalate, the as-obtained GR-CdS photocatalyst is stable during the photocatalytic reduction reactions. A reasonable model has also been proposed to illustrate the reaction mechanism.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available