Chemical Journal of Chinese Universities ›› 2020, Vol. 41 ›› Issue (7): 1645-1652.doi: 10.7503/cjcu20200084

• Physical Chemistry • Previous Articles     Next Articles

Preparation of Boron and Iodine co-Doped Carbon Nitride and Its Performance in Photocatalytic Hydrogen Evolution from Water

ZHU Yuxin,OUYANG Jie,SONG Yanhua,TANG Sheng,CUI Yanjuan*()   

  1. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212008, China
  • Received:2020-02-19 Online:2020-07-10 Published:2020-04-20
  • Contact: Yanjuan CUI E-mail:yjcui@just.edu.cn
  • Supported by:
    † National Natural Science Foundation of China(21503096)

Abstract:

Boron and iodine co-doped carbon nitride(CNBI) catalysts were synthesized using boron oxide as the boron source, ammonium iodide as the iodine source and melamine as the raw-material by one-step calcination method. The samples were characterized and analyzed using X-ray powder diffractometer(XRD), transmission electron microscope(TEM), Fourier transform infrared spectrometer(FTIR), X-ray photoelectron spectrometer(XPS), ultraviolet-visible(UV-Vis) spectrophotometer and electrochemical workstation. The performance of the catalysts was tested by hydrogen production from water under visible light irradiation. The results indicated that the B and I elements were uniformly dispersed and doped into the CN conjugate skeleton to form B, I co-doped CNBI semiconductor materials. Compared with undoped CN, the band gap of co-doped catalysts was slightly reduced, the light absorption range was expanded. The separation efficiency of photo-generated electron-hole pairs was improved, mainly due to the difference in electronegativity of the B and I elements, which helps redispersed the photo-generated carriers of CN. The CNBI(0.1,0.3) sample had the best photocatalytic hydrogen production performance, and hydrogen production rate was 104.30 μmol/h under visible light irradiation, which is 4.6 times that of pure CN(22.74 μmol/h), 2.0 times of CNB(0.1)(51.92 μmol/h) and 3.1 times of CNI(0.3)(33.37 μmol/h), respectively.

Key words: g-C3N4, Photocatalysis, Boron, iodine co-doping, Hydrogen evolution

CLC Number: