Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (5): 50101-050101.doi: 10.11889/j.0253-3219.2018.hjs.41.050101

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS •     Next Articles

Heterogeneous catalytic reaction of SO2 on the surface of ultrafine Fe3O4 particle by XANES

ZHANG Dan1,2, WANG Bing1, LIANG Shanshan1,3, ZHENG Lei4, FENG Weiyue1   

  1. 1. Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Institute of Health Sciences, Anhui University, Hefei 230601, China;
    4. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-12-01 Revised:2018-01-30 Online:2018-05-10 Published:2018-05-08
  • Supported by:
    Supported by Key Program of Joint Funds of National Natural Science Foundation of China (No.U1432245), National Natural Science Foundation of China (No.11475195, No.91543118)

Abstract: [Background] Ultrafine particles (UFPs) may provide various micro-locations of heterogeneous chemical reactions of trace of gaseous substances in atmospheric environment. Iron-containing UFPs are the main components of atmospheric aerosol. [Purpose] This study aims to investigate heterogeneous reactions of SO2 on Fe3O4 UFPs. [Methods] S K-edge of products was investigated by synchrotron radiation X-ray absorption near edge structure (XANES). [Results] The results indicated that SO2 could be rapidly oxidized to form sulfate on the surface of Fe3O4. Formation of sulfate can be promoted under the UV and O3 conditions. [Conclusion] The formation of adsorbed sulfate likely involves the formation of pre-absorbed sulfite (SO32-) and subsequent oxidation.

Key words: SO2, Ultrafine Fe3O4 particle, Heterogeneous reaction, XANES

CLC Number: 

  • TL99