Chemical Journal of Chinese Universities ›› 2020, Vol. 41 ›› Issue (11): 2479-2487.doi: 10.7503/cjcu20200423

• Physical Chemistry • Previous Articles     Next Articles

Photodegradation of Antibiotic in Environmental Water by Graphene Oxide Modulation Bismuth Molybdate Under Visible Light Irradiation

ZHAO Mengxin, MENG Zhe(), LI Heping, MA Zongqin, ZHAN Haijuan, LIU Wanyi   

  1. State Key Laboratory of High?efficiency Utilization of Coal and Green Chemical Engineering,National Demonstration Center for Experimental Chemistry Education,College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China
  • Received:2020-07-02 Online:2020-11-10 Published:2020-11-06
  • Contact: MENG Zhe E-mail:meng_z@nxu.edu.cn
  • Supported by:
    Supported the National Natural Science Foundation of China(21966024);the Natural Science Foundation of Ningxia, China(2019AAC03020);the Discipline Project of Ningxia, China(NXYLXK2017A04)

Abstract:

Using graphene oxide as an activity modulator of photocatalyst, a bismuth molybdate/graphene oxide(Bi2MoO6/GO) heterojunction was synthesized via one-step hydrothermal method. Using Bi2MoO6/GO(mBi2MoO6/mGO=100∶1) as photocatalyst, the visible light response was extended to 570 nm and the band gap energy was reduced to 2.56 eV compared to Bi2MoO6. The photodegradation activity with high selectivity of the Bi2MoO6/GO(100∶1) for quinolones, sulfonamides and tetracyclines antibiotics in the aqueous solution under visible light irradiation, which is improved by 2.1 times compared to Bi2MoO6. The enhancement of photodegradation antibiotics performance is due to addition of appropriate GO, the intimate interfacial contact and large contact area between Bi2MoO6 nanosheets and GO nanosheets via van der Waals forces. It is help to make full use of the electron conductivity of GO for transferring the photogenerated electrons and separating the photoproduced carriers. The radical trapping experiments show that ?OH is played a significant role in the photodegradation procedure. Finally, according to the oxidation products detected by high performance liquid chromato-graphy-mass spectrometric(HPLC-MS), similar degradation pathway and degradation products for the enrofloxacin was proposed compared with the different photocatalyst.

Key words: Bismuth molybdate/graphene oxide(Bi2MoO6/GO), Photocatalyst, Visible light irradiation, Antibiotics, High performance liquid chromatography-mass spectrometric(HPLC-MS)

CLC Number: