title: Sono-chemical synthesis of ZnO nano-particles and their application in hydrogen sulphide gas sensing.
abstract: Herein we describe synthesis of ZnO nanoparticles by using alkaline solution of ZnX2 (X = NO3, Cl) under ultrasound energy of 20 KHz. The reaction can be completed in about 1-2 hours. As prepared powders were analyzed by XRD measurement to find that the product is hexagonal phase pure ZnO. UV-Visible measurement of aq. solution showed absorption band at -365 nm and photoluminescence (PL) indicated multiple bands in visible region due to deep traps owing to high temperature sintering. The hydrophilicity can be imparted by use of a suitable polyelectrolyte. Freshly prepared samples showed good dispersion in aqueous and alcoholic medium. The thick films derived from the ZnO nano-particles showed excellent sensing for hydrogen sulphide gas.
authors: Nanochemistry Laboratory, Department of Applied Chemistry, Defence Institute of Advanced Technology (DIAT), Girinagar, Pune 411025, India.
authors: P K
authors: PK
authors: Khanna
authors: Kunal
authors: K
authors: Kate
authors: K
authors: K
authors: Dhanabalan
authors: Shaibal
authors: S
authors: Banerjee
authors: Nedumkandathil
authors: N
authors: Reji
authors: S D
authors: SD
authors: Shinde
authors: G H
authors: GH
authors: Jain