Journal
NEW JOURNAL OF CHEMISTRY
Volume 45, Issue 23, Pages 10488-10495Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nj01079d
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- King Saud University, Riyadh, Saudi Arabia [RSP-2020/61]
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Zn-doped TiO2 films were successfully deposited on alumina substrates with improved surface characteristics and sensing performance, showing significant response to hazardous formaldehyde gas.
Zn-doped TiO2 films were deposited on ultrasonically treated alumina substrates via the automatic nebulizer spray pyrolysis method. In this study, the thickness of the as-prepared films was gradually reduced, and their Brunauer-Emmett-Teller (BET) surface area and pore volume results were notably improved; in addition, values for the blue-shifted sharp edge absorption with an enlarged bandgap (E-g) were revealed in the deposited films. The agglomerated granular form has evolved into tiny grains with porous brighter particles scattered over the surface of the coated films. The sensing performance to reducing gases for combustible gas of ammonia (NH3) and volatile organic compounds of methanol (CH4O) and formaldehyde (HCHO) with the function of operating temperature and gas concentration were studied, and the highest sensing response of the hazardous formaldehyde (HCHO) reducing gas was noticed.
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