Low temperature self-assembled growth of rutile TiO2/manganese oxide nanocrystalline films

•Anatase was the dominant crystal phase in the lower temperature TiCl4+HCl system.•α-MnO2nano film in TiCl4+HCl induced the formation of Mn3O4/rutile TiO2 nanocomposite.•Oxidation of manganese oxide promoted the nucleation of rutile TiO2. We report formation of rutile TiO2 nanocrystal at low tempera...

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Bibliographic Details
Published inApplied surface science Vol. 420; pp. 489 - 495
Main Authors Sun, Zhenya, Zhou, Daokun, Du, Jianhua, Xie, Yuxing
Format Journal Article
LanguageEnglish
Published Elsevier B.V 31.10.2017
Subjects
Anatase
Manganese oxide
Photocatalyst
Rutile
Self-assemble
Anatase
Rutile
Photocatalyst
Self-assemble
Manganese oxide
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Summary:•Anatase was the dominant crystal phase in the lower temperature TiCl4+HCl system.•α-MnO2nano film in TiCl4+HCl induced the formation of Mn3O4/rutile TiO2 nanocomposite.•Oxidation of manganese oxide promoted the nucleation of rutile TiO2. We report formation of rutile TiO2 nanocrystal at low temperature range in the presence of α-MnO2 which self-assembled onto sulfanyl radical activated silicon oxide substrate. SEM, HRTEM, XPS and Raman spectroscopy were used to study the morphology and oxidation state of synthesised crystals. The results showed that when the α-MnO2 was reduced to Mn3O4, it induced the formation of rutile instead of anatase phase in the TiCl4-HCl aqueous system. The finding will promote the understanding of phase transformation mechanism when manganese oxide and titanium oxide co-exist in soil and water environment.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2017.05.145