Sono-chemical synthesis of ZnO nano-particles and their application in hydrogen sulphide gas sensing |
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| Authors: | Khanna P K Kate Kunal Dhanabalan K Banerjee Shaibal Reji Nedumkandathil Shinde S D Jain G H |
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| Affiliation: | Nanochemistry Laboratory, Department of Applied Chemistry, Defence Institute of Advanced Technology (DIAT), Girinagar, Pune 411025, India. |
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| 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. |
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