Synthesis of type-II TiO2 nanoparticle/ZnO nanorods heterostructure for enhanced photocatalytic activity

被引：4
|
作者：
Kumar, Ajay [1 ]
Nayak, Dipali [2 ]
Sahoo, Pooja [2 ]
Nandi, Barun Kumar [1 ]
Thangavel, R. [2 ]
机构：
[1] IIT ISM Dhanbad, Dept Fuel Minerals & Met Engn, Dhanbad 826004, Jharkhand, India
[2] IIT ISM Dhanbad, Dept Phys, Dhanbad 826004, Jharkhand, India
来源：
MATERIALS LETTERS | 2024年 / 367卷
关键词：
Type-II band-alignment; TiO2/ZnO heterostructure; Dye degradation; Photocatalysis;
D O I：
10.1016/j.matlet.2024.136672
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A type -II TiO 2 /ZnO heterostructure is fabricated by coating TiO 2 nanoparticles (2, 4 and 6 layers) over ZnO nanorods using sol -gel method to obtain the optimized system with enhanced photocatalytic activity. TiO 2 / ZnO:6 layer exhibited a higher optical absorption and lowest bandgap value among the synthesized samples. A lower photoluminescence (PL) intensity is noticed for TiO 2 /ZnO:6 layer sample, ensuring efficient reduction of carrier recombination rate. Moreover, TiO 2 /ZnO:6 layer exhibited maximum methylene blue (MB) and phenolphthalein dyes degradation efficiency of 86.3% and 76.5% respectively under UV light illumination for 180 min. Our study proposes that formation of type -II heterostructure enhances the photocatalytic activity.
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页数：4
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