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Journal of Materials Science
Erschienen in: Journal of Materials Science 1/2019

31.08.2018 | Chemical routes to materials

Preparation of the all-solid-state Z-scheme WO3/Ag/AgCl film on glass accelerating the photodegradation of pollutants under visible light

verfasst von: Hongbiao Fang, Xin Cao, Jiajie Yu, Xiang Lv, Nan Yang, Tianhe Wang, Wei Jiang

Erschienen in: Journal of Materials Science | Ausgabe 1/2019

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Abstract

Tungsten oxide (WO3) is a well-known photocatalyst, but its application is restricted due to its low conduction band and reduction power. In addition, WO3 catalyst in powder forms has little application prospect because of difficulties in separation and regeneration. In this work, we prepared WO3/Ag/AgCl films on conventional glass that not only have much enhanced photocatalytic capability but also can be readily regenerated. The WO3 film was prepared on glass substrate by calcination of spin-coated W precursor. Ag/AgCl particles were then deposited on WO3 film by an impregnating–precipitation–photoreduction method. The photocatalytic efficiency of WO3/Ag/AgCl was evaluated by using methyl orange (MO) and Rhodamine B (RhB) as target pollutants. The highest photocatalytic performance was achieved with the 3-WO3/Ag/AgCl film, being 18 and 13 times higher than that of pure WO3 film for degradation of MO and RhB, respectively. The degradation rate for both MO and RhB by 3-WO3/Ag/AgCl film catalyst decreased by less than 5% after five cycled tests. The photodegradation mechanism was discussed based on the electrochemical impedance spectroscopy Nyquist tests, photoelectrochemical analysis and reactive oxygen species scavenging experiments. A possible all-solid-state Z-scheme mechanism is proposed based on the photoelectron chemical tests and radical trapping experiments. This study provides a feasible technique to prepare a photocatalytic film with practicability and reproducibility.
Vorheriger Artikel Synthesis of gold particles at room temperature ionic liquid–ethylene glycol interfaces: effect of processing time and concentration
Nächster Artikel Transparent heat insulation coatings with high selective shielding ability designed with novel superstructures of copper sulfide nanoplates

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Metadaten
Titel
Preparation of the all-solid-state Z-scheme WO3/Ag/AgCl film on glass accelerating the photodegradation of pollutants under visible light
verfasst von
Hongbiao Fang
Xin Cao
Jiajie Yu
Xiang Lv
Nan Yang
Tianhe Wang
Wei Jiang
Publikationsdatum
31.08.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 1/2019
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2856-5

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