Influence of Anatase-Rutile Ratio on Band Edge Position and Defect States of TiO2 Homojunction Catalyst

被引：32

作者：

Sarngan, Pooja P. ^{[1
]}

Lakshmanan, Agasthiyaraj ^{[1
]}

Sarkar, Debabrata ^{[1
]}

机构：

[1] SRM Inst Sci & Technol, Dept Phys & Nanotechnol, Appl NanoPhys Lab, Kattankulathur 603203, India

来源：

CHEMOSPHERE | 2022年 / 286卷

关键词：

Electrospinning; Phase transformation; Raman strain; Photocatalytic activity; TiO2; nanofibers; PHOTOCATALYTIC ACTIVITY; ZNO NANOPARTICLES; WILLIAMSON-HALL; DEGRADATION; ALIGNMENT; STRAIN; CARBON; PHOTOLUMINESCENCE; TEMPERATURE; PERFORMANCE;

D O I：

10.1016/j.chemosphere.2021.131692

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Removal of toxic air and water dissociation in the environment has become a major challenging issue throughout the world. Mixed phase rutile-anatase titanium dioxide catalysts are very effective in photocatalysis and have been studied extensively. However, the mechanism causing this effect and band alignment of the two phases are not fully understood. Pointing to the issue, we have designed one-dimensional mixed-phase TiO2 and introduced defects near the valence band. Experimental results showed that band alignment between two phases, up-shift of the band edge, and optimum anatase percentage play a key role in the enhancement of the photocatalytic activity. We predicted shifts in band edge originating from surface electric dipole layer induced by defects.

引用

页数：10