Enhancing photocatalytic ability of TiO2 films using gel-derived P/Si-TiO2powder

doi:10.1007/s10971-020-05450-5

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Title:	Enhancing photocatalytic ability of TiO2 films using gel-derived P/Si-TiO2powder
Authors:	Yu, Hsuan-fu;Cheng, Chao-wei
Keywords:	TiO2 films;Photocatalysis;Kinetics;Dye degradation;Optical properties;Microstructure
Date:	2021-01-16
Issue Date:	2021-08-19 12:12:58 (UTC+8)
Abstract:	P/Si-TiO2 photocatalytic thick films on FTO glass substrates were prepared. TiO2 thin films, as base layer, were first coated on substrates using a spin-coating technique. The slurry containing P/Si-TiO2 nanoparticles was bar-coated on the surface of TiO2 base layer, followed by calcining at 550 °C. The resultant films were characterized using x-ray diffractometer, scanning electron microscope, UV–Vis spectrophotometer, crosscut adhesion test, and recycling-use test. Under 365-nm UV-light irradiation, abilities of the films to photocatalytically degrade methylene blue were evaluated. The apparent rate laws obeyed 1st-order and the corresponding reaction rate constants (k′), based on the coated area of substrates, were estimated. k′ of the thick film (thickness: 6.5 μm; composition: P/Si-TiO2 anatase crystallites with 16 nm average size) was 49.0 L/(m2-sub. h), which was about eight times of that of the thin film (k′ = 6.2 L/(m2-sub. h); thickness: 215 nm; composition: pure TiO2 anatase crystallites with 8-nm average size).
Relation:	Journal of Sol-Gel Science and Technology,97,p.259–270
DOI:	10.1007/s10971-020-05450-5
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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