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Journal articles
Photochemical solution deposition of beta-Bi2O3 thin films
Abstract : The non-equilibrium beta-Bi2O3 polymorph is stabilized in thin films by a photochemical synthesis method. A strong ultraviolet-absorbing bismuth(III)-N-methyldiethanolamine complex is synthesized in solution as an ideal precursor for the beta-Bi2O3 phase. Ultraviolet-light induces the formation of an amorphous -Bi-O-Bi- continuous network in the films deposited from the former solution that easily converts into the beta-Bi2O3 polymorph at a temperature as low as 250 A degrees C. The room temperature stabilization of the beta-Bi2O3 phase is confirmed by their structural characterization using four-circle X-ray diffractometry. This study unequivocally identified the tetragonal crystal structure of the beta-Bi2O3 polymorph in the films. The high phase purity of these beta-Bi2O3 films is responsible for their exceptional visible-light photocatalytic activity, thus enabling the applications of the films of this metastable phase at room-temperature conditions.
https://hal-normandie-univ.archives-ouvertes.fr/hal-02175437
Contributor : Elisabeth van T Hof <>
Submitted on : Friday, July 5, 2019 - 5:01:59 PM
Last modification on : Friday, November 1, 2019 - 6:52:05 PM
Contributor : Elisabeth van T Hof <>
Submitted on : Friday, July 5, 2019 - 5:01:59 PM
Last modification on : Friday, November 1, 2019 - 6:52:05 PM
