Heterostructured ZnFe2O4/Fe2TiO5/TiO2 Composite Nanotube Arrays with an Improved Photocatalysis Degradation Efficiency Under Simulated Sunlight Irradiation

Nano-Micro Letters

Xianguo Tuo¹  Yuliang Liu²  Kun Xiong²  Lin Chen²  Kunzhou Wang²  Qingbo Fan²  Jérémie Courtois²  Xinqing Wang²  Minhao Yan² 

[1] Sichuan University of Science and Engineering;State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology;

关键词: Titanium dioxide nanotube arrays;    Zinc ferrites nanocrystals;    Pseudobrookite;    Photocatalysis;    Methylene blue;    Heterojunction;   

DOI  :  10.1007/s40820-017-0169-x

来源: DOAJ

【 摘 要 】

Abstract To improve the visible light absorption and photocatalytic activity of titanium dioxide nanotube arrays (TONTAs), ZnFe2O4 (ZFO) nanocrystals were perfused into pristine TONTA pipelines using a novel bias voltage-assisted perfusion method. ZFO nanocrystals were well anchored on the inner walls of the pristine TONTAs when the ZFO suspensions (0.025 mg mL−1) were kept under a 60 V bias voltage for 1 h. After annealing at 750 °C for 2 h, the heterostructured ZFO/Fe2TiO5 (FTO)/TiO2 composite nanotube arrays were successfully obtained. Furthermore, Fe3+ was reduced to Fe2+ when solid solution reactions occurred at the interface of ZFO and the pristine TONTAs. Introducing ZFO significantly enhanced the visible light absorption of the ZFO/FTO/TONTAs relative to that of the annealed TONTAs. The coexistence of type I and staggered type II band alignment in the ZFO/FTO/TONTAs facilitated the separation of photogenerated electrons and holes, thereby improving the efficiency of the ZFO/FTO/TONTAs for photocatalytic degradation of methylene blue when irradiated with simulated sunlight.

【 授权许可】

Unknown