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Investigation of nitrogen doped and carbon species decorated TiO2 with enhanced visible light photocatalytic activity by using chitosan

Paper ID Volume ID Publish Year Pages File Format Full-Text
45464 46412 2015 8 PDF Available
Title
Investigation of nitrogen doped and carbon species decorated TiO2 with enhanced visible light photocatalytic activity by using chitosan
Abstract

•N-doped, carbon species decorated TiO2 composites (Cts/TiO2) are synthesized.•High photocatalytic activity and stability are observed for degradation of RhB.•The mechanism of photocatalytic degradation of RhB is illustrated.

Nitrogen-doped and carbon species decorated TiO2 composites (Cts/TiO2) are prepared by using chitosan as a natural nitrogen and carbon source to combine with TiO2 by a facile and low-cost method for the first time. Their structures and properties are characterized by X-ray diffraction (XRD), UV–vis diffuse reflectance spectroscopy (DRS), Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), N2 adsorption–desorption isotherms (BET), and electron spin resonance spectroscopy (ESR). The results show that the visible light absorption range of the composites even can be extended to 650 nm. Photocatalytic degradation of Rhodamine B (RhB) under visible light (420 nm < λ < 800 nm) irradiation is used as a model reaction to evaluate the photocatalytic activity of the composites. When the additive amount of chitosan is 0.25 g, the sample Cts/TiO2-25 possesses the highest activity, which is over 4.8 times of N-TiO2. The detection of active species during the photocatalytic process shows that superoxide radicals (O2−) play the most important role, then the probable degradation mechanism of the photocatalysts is proposed simultaneously. It is hoped that our work will open a new doorway to use a simple and green method to get high-efficiency TiO2-based photocatalysts.

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Keywords
TiO2; Chitosan; Nitrogen doped; Carbon species decorated; Photocatalytic degradation
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Investigation of nitrogen doped and carbon species decorated TiO2 with enhanced visible light photocatalytic activity by using chitosan
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 179, December 2015, Pages 344–351
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us