Synthesis of TiO₂-N/SnO₂ heterostructure photocatalyst and its photocatalytic mechanism

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• 作者：Han Cao^a ; Shaolong Huang^d ; Yanlong Yu^b ; ^c ; Yabin Yan^b ; Yuekai Lv^a ; ^{yuekai_lu@sina.com" class="auth_mail" title="E-mail the corresponding author} ; Yaan Cao^b ; ^{caoya@nankai.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：TiO2-N ; SnO2 ; Visible response ; Heterostructure
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：486
• 期：Complete
• 页码：176-183
• 全文大小：1481 K

文摘

A series of TiO₂-N/SnO₂X heterostructure photocatalysts were synthesized by a hydrolysis-deposition method. The structure, existing states of N and SnO₂ heterostructure at the interface of TiO₂-N/SnO₂X were studied by EADX, XRD, Raman, FT-IR, XPS, and HRTEM. The band structure is investigated by both theoretical calculation and experiment characterization. It was found that the introduction of NO_x surface species and SnO₂ nanoparticles would enhance the absorption in visible region, increase reactive oxidative species and separate photogenerated electrons and holes efficiently. Therefore, the photocatalytic activity is improved significantly for TiO₂-N/SnO₂X, compared with TiO₂-N and TiO₂ under visible and UV light irradiation. This work may offer a new strategy to fabricate new photocatalyst with high photocatalytic performance.