Growth and characterization of Ta₂O₅ nanorod and WTa₂O₅ nanowire films on the tantalum substrates by a facile one-step hydrothermal method

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• 作者：Mohamad Mohsen Momeni^a ; ^{mm.momeni@cc.iut.ac.ir" class="auth_mail" title="E-mail the corresponding author} ; Mahboubeh Mirhosseini^b ; ^c ; Maliheh Chavoshi^b ; ^c
• 关键词：Nanostructure ; Tantalum oxide ; Film ; Tungsten ; Hydrothermal ; Photo catalyst
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：15 May 2016
• 年：2016
• 卷：42
• 期：7
• 页码：9133-9138
• 全文大小：2049 K

文摘

Tungsten doped tantalum pentoxide (WTa₂O₅) nanostructured film has been successfully prepared via a facile eco-friendly one-step hydrothermal method on tantalum substrate. The synthesized sample was characterized by various techniques and its photo catalytic activity was investigated in methylene blue degradation under xenon light irradiation. Results indicated that the introduction of tungsten into Ta₂O₅ promoted the light absorption performance, which resulted in a high photo catalytic activity of WTa₂O₅ nanostructure. WTa₂O₅ sample showed a methylene blue degradation rate of 0.0085 min⁻¹ which was about 9 times higher than those of pure Ta₂O₅. The quenching effects of different scavengers demonstrate that the active species of ${\mathrm{O}}_2^{-•}$ and OH^• play major roles in the whole photo degradation process of methylene blue. It is expected that this new WTa₂O₅ nanostructure may be a promising candidate for organic pollutant degradation.