Graphene�ZnO nanocomposite sensor for lead-ion detection

Arora, S and Punith Kumar, MK and Srivastava, C (2020) Graphene�ZnO nanocomposite sensor for lead-ion detection. In: Philosophical Magazine Letters .

PDF phi_mag_let_2020.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

Graphene�ZnO (G-ZnO) nanocomposites with different weight percentages of ZnO were prepared by one-step mechanical milling of graphite and Zn powder in an aqueous medium containing melamine as surfactant. The presence of water ensured oxidation of the Zn particles to ZnO. Melamine-assisted exfoliation led to the formation of triangular-shaped graphene sheets for 10 and 15 wt. Zn and rod-like ZnO nanocrystals for 20 wt. Zn loading. Cyclic voltammetric studies showed significantly higher sensitivity of the G-ZnO composites towards the detection of toxic lead (Pb2+) ions, primarily on account of band-gap engineering of the ZnO nanoparticles on the graphene sheets. © 2020 Informa UK Limited, trading as Taylor & Francis Group.

Item Type:	Journal Article
Publication:	Philosophical Magazine Letters
Publisher:	Taylor and Francis Ltd.
Additional Information:	The copyright of this article belongs to Taylor and Francis Ltd.
Keywords:	Chemical detection; Energy gap; Graphene; II-VI semiconductors; Mechanical alloying; Milling (machining); Nanocomposites; Oxide minerals; Zinc oxide, Band gap engineering; Cyclic voltammetric; Graphene sheets; Mechanical milling; Nanocomposite sensors; Presence of water; Weight percentages; ZnO nanocrystal, ZnO nanoparticles
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	08 Oct 2020 06:25
Last Modified:	08 Oct 2020 06:25
URI:	http://eprints.iisc.ac.in/id/eprint/66547

Actions (login required)

View Item