SCI和EI收录∣中国化工学会会刊

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. 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. 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: 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