| HU Ya-wei,GAO Hui,WANG Xiao-fang.Preparation and Photocatalytic Performance of g-C3N4/TiO2 Nanotubes Arrays[J],47(12):113-118 |
| Preparation and Photocatalytic Performance of g-C3N4/TiO2 Nanotubes Arrays |
| Received:April 13, 2018 Revised:December 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.12.016 |
| KeyWord:TiO2 nanotube array g-C3N4 photocatalytic activity anodic oxidation methylene blue |
| Author | Institution |
| HU Ya-wei |
Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an , China |
| GAO Hui |
Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an , China |
| WANG Xiao-fang |
Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an , China |
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| Abstract: |
| The work aims to obtain a kind of photocatalytic material with high activity and able to be recycled and reused under visible light. Firstly, TiO2 nanotubes arrays (TiO2 NTAs) were prepared on titanium substrate by anodic oxidation method. Then, g-C3N4/TiO2 NTAs composite films were prepared through high temperature thermal decomposition under nitrogen protection by dipping TiO2 NTAs in 10% urea solution for different time. XRD, SEM and TEM were used to characterize the phase and morphology of the composite films. Under visible light irradiation, the photocatalytic properties of composite films were evaluated by the catalytic degradation experiments of methylene blue solution. The photocatalytic activity of g-C3N4/TiO2 NTAs dipped in the 10 % urea solution for different time was higher than that of pure TiO2 NTAs. Simultaneously, the photocatalytic activity of g-C3N4/TiO2 NTAs was increasing with the increase of dipping time. Moreover, the photocatalytic activity of g-C3N4/TiO2 NTAs dipped in the urea solution for 6 h was the highest under the visible light and the degradation rate of methylene blue could reach 73% for 120 min. With the continuous prolonging of dipping time in urea solution, the photocatalytic activity of g-C3N4/TiO2 NTAs decreased. g-C3N4 combined with TiO2 NTAs can improve the photocatalytic activity of TiO2 NTAs, because the composite g-C3N4 improves the transmission efficiency of carrier and also promotes the absorptance of visible light. |
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