Enhanced performance of g-C3N4/TiO2 photocatalysts for degradation of organic pollutants under visible light

doi:10.1016/j.cjche.2015.05.003

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (8): 1326-1334.DOI: 10.1016/j.cjche.2015.05.003

• 催化、动力学与反应工程 • 上一篇下一篇

Enhanced performance of g-C₃N₄/TiO₂ photocatalysts for degradation of organic pollutants under visible light

Gaixue Song¹, Zhenyu Chu¹, Wanqin Jin¹, Hongqi Sun²

1 State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2 Department of Chemical Engineering, Curtin University, Perth WA6845, Australia

收稿日期:2014-10-21 修回日期:2015-05-06 出版日期:2015-08-28 发布日期:2015-09-26
通讯作者: Wanqin Jin, Hongqi Sun
基金资助:
Supported by the Innovative Research Team Programby the Ministry of Education of China (IRT13070), the Nature Science Foundation of Jiangsu Province (BK2012423, BK20130925), and the Opening Project of State Key Laboratory of Materials-Oriented Chemical Engineering of China (KL13-02).

Enhanced performance of g-C₃N₄/TiO₂ photocatalysts for degradation of organic pollutants under visible light

Gaixue Song¹, Zhenyu Chu¹, Wanqin Jin¹, Hongqi Sun²

1 State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2 Department of Chemical Engineering, Curtin University, Perth WA6845, Australia

Received:2014-10-21 Revised:2015-05-06 Online:2015-08-28 Published:2015-09-26
Contact: Wanqin Jin, Hongqi Sun
Supported by:
Supported by the Innovative Research Team Programby the Ministry of Education of China (IRT13070), the Nature Science Foundation of Jiangsu Province (BK2012423, BK20130925), and the Opening Project of State Key Laboratory of Materials-Oriented Chemical Engineering of China (KL13-02).

摘要/Abstract

摘要： Photocatalytic degradation is one of the most promising remediation technologies in terms of advanced oxidation processes (AOPs) for water treatment. In this study, novel graphitic carbon nitride/titanium dioxide (g-C₃N₄/TiO₂) composites were synthesized by a facile sonication method. The physicochemical properties of the photocatalystwith different mass ratios of g-C₃N₄ to TiO₂were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), N₂ sorption, Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and UV-vis DRS. The photocatalytic performances were evaluated by degradation of methylene blue. Itwas found that g-C₃N₄/TiO₂with amass ratio of 1.5:1 exhibited the best degradation performance. Under UV, the degradation rate of g-C₃N₄/TiO₂ was 6.92 and 2.65 times higher than g-C₃N₄ and TiO₂, respectively. While under visible light, the enhancement factors became 9.27 (to g-C₃N₄) and 7.03 (to TiO₂). The improved photocatalytic activity was ascribed to the interfacial charge transfer between g-C₃N₄ and TiO₂. This work suggests that hybridization can produce promising solar materials for environmental remediation.

关键词: Carbon nitride, Titanium dioxide, Composite, Photodegradation, Sonication

Abstract: Photocatalytic degradation is one of the most promising remediation technologies in terms of advanced oxidation processes (AOPs) for water treatment. In this study, novel graphitic carbon nitride/titanium dioxide (g-C₃N₄/TiO₂) composites were synthesized by a facile sonication method. The physicochemical properties of the photocatalystwith different mass ratios of g-C₃N₄ to TiO₂were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), N₂ sorption, Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and UV-vis DRS. The photocatalytic performances were evaluated by degradation of methylene blue. Itwas found that g-C₃N₄/TiO₂with amass ratio of 1.5:1 exhibited the best degradation performance. Under UV, the degradation rate of g-C₃N₄/TiO₂ was 6.92 and 2.65 times higher than g-C₃N₄ and TiO₂, respectively. While under visible light, the enhancement factors became 9.27 (to g-C₃N₄) and 7.03 (to TiO₂). The improved photocatalytic activity was ascribed to the interfacial charge transfer between g-C₃N₄ and TiO₂. This work suggests that hybridization can produce promising solar materials for environmental remediation.

Key words: Carbon nitride, Titanium dioxide, Composite, Photodegradation, Sonication

Gaixue Song, Zhenyu Chu, Wanqin Jin, Hongqi Sun. Enhanced performance of g-C₃N₄/TiO₂ photocatalysts for degradation of organic pollutants under visible light[J]. Chinese Journal of Chemical Engineering, 2015, 23(8): 1326-1334.

Gaixue Song, Zhenyu Chu, Wanqin Jin, Hongqi Sun. Enhanced performance of g-C₃N₄/TiO₂ photocatalysts for degradation of organic pollutants under visible light[J]. Chin.J.Chem.Eng., 2015, 23(8): 1326-1334.

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Enhanced performance of g-C₃N₄/TiO₂ photocatalysts for degradation of organic pollutants under visible light

Enhanced performance of g-C₃N₄/TiO₂ photocatalysts for degradation of organic pollutants under visible light

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