Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (9): 942-948.doi: 10.15541/jim20170538

Special Issue: 环境材料

• Orginal Article • Previous Articles     Next Articles

Reductive Preparation of Blue TiO2 via Deposition of Aluminum

Peng SHENG(), Guang-Yao ZHAO, Li XU, Shuang-Yu LIU, Bo WANG, Hai-Zhen LIU, Guang MA, Yu HAN, Xin CHEN   

  1. Material Laboratory of State Grid Corporation of China, State Key laboratory of Advanced Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102209, China
  • Received:2017-12-19 Revised:2018-02-02 Online:2018-09-20 Published:2018-08-14
  • Supported by:
    Science and Technology Project of State Grid Corporation of China (SGRIDGKJ[2015]452)

Abstract:

Improving catalysis efficiency and reducing production cost attract extensive interest for the study of photocatalyst. Herein a blue titania crystal with aluminum atoms modified on the surface was prepared by aluminum reduction and deposition. The blue titania displays a unique core-shell structure with crystallization nuclei inside and with oxygen vacancies and aluminum atoms outside. And the blue titania shows excellent photocatalytic and electrochemical performance under simulated sunlight. Under high vacuum, with vapored aluminum atoms being deposited on titania nanocrystals, Ti4+ is reduced to Ti3+, which creates a large number of oxygen vacancies on the surface. Additionally, moderate amounts of aluminum atoms coated on titania become photo-induced charge carrier traps, facilitating the separation and transport of charge carriers, which enhances the photocatalytic capability. TiO2-Al0.36 exhibits the best photocatalytic performance, degrading methyl orange in 8 min, and it shows excellent photochemical property with the photocurrent of 1.47 mA·cm-2, which is more than 8 times as high as that of pristine titania (0.17 mA·cm-2).

Key words: blue titania, aluminum reduction and deposition, photocatalysis, contaminant degradation, photoelectrochemistry

CLC Number: 

  • TQ174