Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 603, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2020.125193
Keywords
Photocatalytic; TiO(2 )nanotubes; Z-scheme; Rhodamine B
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Funding
- Natural Science Foundation of Shandong Province of China [ZR2019MEM020, ZR2017LEM004]
- Fundamental Research Funds for the Central Universities of China [18CX02091A]
- Key Laboratory of Oil & Gas Equipment, Ministry of Education (Southwest Petroleum University) [OGE201702-07]
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A simple anodic oxidation method was used to prepare TiO2 nanotubes (TNTs), and calcined at 500 degrees C with urea to prepare g-C3N4/TNTs (CN/TNTs) composites. The photocatalytic activity of TNTs was improved by constructing a Z-scheme transfer mechanism. The results show that 2 g CN/TNTs greatly improves the separation efficiency of electron-hole pairs and reduces its recombination efficiency, and the visible light absorption also undergoes a significant redshift. The degradation of rhodamine B can reach 96.3 %, and the degradation rate is 0.0195min(-1). The sample has good stability and can be used repeatedly without losing activity. In the CN/TNTs system, h(+), O-center dot(2)- and (OH)-O-center dot are active species.
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