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Ultrafine Bi3TaO7 Nanodot-Decorated V, N Codoped TiO2 Nanoblocks for Visible-Light Photocatalytic Activity: Interfacial Effect and Mechanism Insight
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-03-15 00:00:00 , DOI: 10.1021/acsami.9b00903 Chengzhang Zhu , Yuting Wang , Zhifeng Jiang 1, 2 , Annai Liu , Yu Pu , Qiming Xian , Weixin Zou , Cheng Sun
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-03-15 00:00:00 , DOI: 10.1021/acsami.9b00903 Chengzhang Zhu , Yuting Wang , Zhifeng Jiang 1, 2 , Annai Liu , Yu Pu , Qiming Xian , Weixin Zou , Cheng Sun
Affiliation
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Bi3TaO7 is a potential photocatalyst because of its high chemical stability, defective fluorite-type structure, and superior mobility of photoinduced holes. However, few studies have focused on the interfacial effects of Bi3TaO7-based photocatalysts. In this work, 0D Bi3TaO7 nanodot-hybridized 3D V and N codoped TiO2 nanoblock (B/VNT) composites were first synthesized for the photocatalytic removal of oxytetracycline hydrochloride, 2,4,6-trichlorophenol, and tetrabromobisphenol A. The fabricated B/VNT had a photocatalytic performance superior to that of pristine components, and probable degradation pathways were proposed according to the primary intermediates identified by a gas chromatography–mass spectrometer. Interestingly, on B/VNT, the transfer of interfacial electrons was observed from V/N–TiO2 to Bi3TaO7, and the formed built-in electronic field led to a direct Z-scheme structure, rather than type II, as confirmed by the generated •OH and •O2– radicals and band structures from the density functional theory calculation. Therefore, the strong interfacial electronic interaction on the B/VNT was significant, which drove faster photogenerated charge transfer, more visible-light adsorption, and active •OH and •O2– generation, thus improving the photocatalytic activity.
中文翻译：
可见光光催化活性的超细Bi 3 TaO 7纳米点修饰的V，N共掺杂的TiO 2纳米嵌段：界面效应和机理研究
Bi 3 TaO 7具有高的化学稳定性，有缺陷的萤石型结构和光致空穴的出色迁移性，因此是一种潜在的光催化剂。然而，很少有研究集中在基于Bi 3 TaO 7的光催化剂的界面作用上。在这项工作中，0D Bi 3 TaO 7纳米点杂化的3D V和N共掺杂的TiO 2纳米嵌段（B / VNT）复合材料首先被合成用于光催化去除盐酸土霉素，2,4,6-三氯苯酚和四溴双酚A。制得的B / VNT具有优于原始成分的光催化性能，并且可能具有降解途径根据气相色谱-质谱仪鉴定的主要中间体提出了相应的化合物。有趣的是，在B / VNT上，观察到界面电子从V / N-TiO 2转移到Bi 3 TaO 7，并且形成的内置电场导致了直接的Z型结构，而不是II型。由生成的• OH和• O 2确认–自由基和能带结构由密度泛函理论计算得出。因此，B上的强的界面电子交互/ VNT是显著，拉动更快光生电荷转移，更可见光吸附和活性• OH和• ö 2 -的生成，从而提高了光催化活性。
更新日期：2019-03-15
中文翻译：
可见光光催化活性的超细Bi 3 TaO 7纳米点修饰的V，N共掺杂的TiO 2纳米嵌段：界面效应和机理研究
Bi 3 TaO 7具有高的化学稳定性，有缺陷的萤石型结构和光致空穴的出色迁移性，因此是一种潜在的光催化剂。然而，很少有研究集中在基于Bi 3 TaO 7的光催化剂的界面作用上。在这项工作中，0D Bi 3 TaO 7纳米点杂化的3D V和N共掺杂的TiO 2纳米嵌段（B / VNT）复合材料首先被合成用于光催化去除盐酸土霉素，2,4,6-三氯苯酚和四溴双酚A。制得的B / VNT具有优于原始成分的光催化性能，并且可能具有降解途径根据气相色谱-质谱仪鉴定的主要中间体提出了相应的化合物。有趣的是，在B / VNT上，观察到界面电子从V / N-TiO 2转移到Bi 3 TaO 7，并且形成的内置电场导致了直接的Z型结构，而不是II型。由生成的• OH和• O 2确认–自由基和能带结构由密度泛函理论计算得出。因此，B上的强的界面电子交互/ VNT是显著，拉动更快光生电荷转移，更可见光吸附和活性• OH和• ö 2 -的生成，从而提高了光催化活性。
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