Journal
JOURNAL OF POROUS MATERIALS
Volume 22, Issue 3, Pages 797-806Publisher
SPRINGER
DOI: 10.1007/s10934-015-9953-5
Keywords
Photocatalysis; ZnO-graphene; 4-Nitrophenol; Rhodamine B; Propranolol; 4-Chlorophenol
Funding
- Council of Scientific and Industrial Research, India [CSIR] [09/137(0548)/2013-EMR-I]
- Board of Research in Nuclear Sciences, Mumbai, India [GOI-A 667]
- Department of Science and Technology New Delhi, India [GOI-A 661]
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In the present study we have synthesized a series of ZnO-graphene composites with different initial amounts of graphene oxide by hydrazine assisted hydrothermal method. The structure, morphology, thermal, optical and electrochemical properties were characterized by XRD, Raman, SEM, TEM, thermogravimetry, photoluminescence, UV-visible spectroscopy and cyclic voltammetry measurements. The composites thus obtained were utilized as photocatalysts for degradation of aqueous organic pollutants under UV irradiation. We inferred that, photoperformance of the catalysts depends on the amount of graphene present in the composite. The composite with weight ratio of graphene oxide to zinc acetate as 1.4 % (ZG-3) has shown similar to fivefold enhancement in the degradation rate (as compared to ZnO) of 4-nitrophenol. Further, the obtained results for the photocatalytic degradation and mineralization of 4-nitrophenol, rhodamine B, propranolol and 4-chlorophenol suggest the non-selectivity of ZnO-graphene photocatalyst. These composites have potential applications for wastewater treatment.
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