Bera, Susanta and Pal, Moumita and Naskar, Atanu and Jana, Sunirmal (2016) Hierarchically structured ZnO-graphene hollow microspheres towards effective reusable adsorbent for organic pollutant via photodegradation process. Journal of Alloys and Compounds, 669. pp. 177-186. ISSN 0925-8388

PDF - Published Version Restricted to Registered users only Download (4Mb) | Request a copy

Abstract

Present work reports on successful synthesis of hierarchical hollow microspheres (HHM) from ZnO-chemically converted graphene (CCG) nanocomposites by adopting low-temperature surfactant/template free solution method, varying graphene oxide (GO) to zinc acetate dihydrate weight ratio (R = 0.00, 0.01, 0.032, 0.063) in the precursors. It is found that the HHM consist of self-assembled ZnO nanoparticles, chemically interacted with CCG as evidenced from structural characterizations (X-ray diffraction, field emission scanning and transmission electron microscopes) with UV-Vis, FTIR, Raman and Xray photoelectron spectroscopies. Multipoint BET nitrogen adsorption-desorption isotherms of ZG30, synthesized using an optimum GO content (R = 0.032) showed relatively high specific surface area. The sample showed significantly improved adsorption capacity of rhodamine B dye (as water pollutant) compare to pristine ZnO (R = 0.0) as well as commercially available P25 (TiO2). The ZG30 functioned as reusable adsorbent due to its highly efficient photocatalytic activity under UV (lambda, 254 nm) irradiation. Methyl orange and phenol were also used to check the effectiveness of ZG30 for permanent cleaning of the pollutants. This facile process could create an avenue for synthesis of hollow microspheres from different metal oxide semiconductor-graphene nanocomposites for efficient and reusable adsorbent of water soluble organic pollutants. (C) 2016 Elsevier B.V. All rights reserved.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	Sol Gel
Depositing User:	Bidhan Chaudhuri
Date Deposited:	10 Nov 2016 07:33
Last Modified:	10 Nov 2016 07:33
URI:	http://cgcri.csircentral.net/id/eprint/3709

Actions (login required)

View Item