Photoelectrochemical studies of PbO-ZnO composite thin films developed from {ZnPb(OAc)(TFA)3(THF)2}n complex by AACVD for water splitting | [First International Conference on Revamped Scientific Outlook of 21st Century (Abstract Book) • 2022]

Author(s):

1. Maria Batool: Department of Environmental Sciences, Fatima Jinnah Women University,The Mall, Rawalpindi,Pakistan

2. Rohama Gill: Department of Environmental Sciences, Fatima Jinnah Women University,The Mall, Rawalpindi,Pakistan

3. Khadija Munawar: Advanced Manufacturing and Materials Processing (AMMP) Centre, Faculty of Engineering, University of Malaya,Kuala Lumpur,Malaysia

4. Muhammad Mazhar: School of Natural Sciences (SNS), National University of Sciences and Technology (NUST),Islamabad,Pakistan

Abstract:

Excessive consumption of fossil fuels and non-renewable energy resources has not only created turmoil to the natural balance of such resources, but this unsustainable trend is also rendering a rapid decline in their reserves as well. With the view to focusing on alternate, renewable and clean energy, the current study aims to employ cost effective, thermally stable, and high photosensitive ZnO, by tuning its band gap favorable for solar water splitting. ZnO-PbO composite thin films were deposited onto fluorine doped tin oxide (FTO) coated glass substrates from a newly synthesized polymeric Zn-Pb single source precursor {ZnPb(OAc)(TFA)3(THF)2}n via aerosol-assisted chemical vapor deposition. The precursor was synthesized using Zn(CH3CO2)2·2H2O, and Pb(CH3CO2)2·3H2O in the presence of triflouroacetic acid. The complex ({ZnPb(OAc)(TFA)3(THF)2}n) was characterized by NMR and single crystal X-ray analysis. The precursor had MP of 72 ?C and decomposed at 450 ?C with 36.6% residue as obtained via TGA. XRD analysis of thin films predicted a prominent growth of ZnO-PbO crystallites. FESEM analysis illustrated a homogenous and smooth surface with evenly distributed microspheres. Direct band gap of 2.40 eV was obtained that proved the narrowing of band gap in composite form of ZnO with PbO. Photoelectrochemical studies of ZnOPbO photo electrode exhibited the photocurrent density of 705 µA cm-2 at an applied potential of +0.8 VSCE. EIS studies reveal efficient charge transfer mechanism. It is, thus, concluded that ZnO-PbO is a promising class of materials that has enormous potential to be employed as photo electrode for renewable energy applications.

Page(s): 0-0

DOI: DOI not available

Published: Journal: First International Conference on Revamped Scientific Outlook of 21st Century (Abstract Book), Volume: 0, Issue: 0, Year: 2022

Keywords:

renewable energy , Water splitting , Composite , Photsensitivity

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