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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (10): 101001.doi: 10.1088/2058-6272/aad547

• Research Note •     Next Articles

Fast and low-temperature elimination of organic templates from SBA-15 using dielectric barrier discharge plasma

Lin WANG (王林) 1,2,3, Junkang YAO (姚军康) 2,4, Zheng WANG (王政) 2,5, Hongqiao JIAO (焦洪桥) 3 , Jing QI (齐静) 3 , Xiaojing YONG (雍晓静) 3 and Dianhua LIU (刘殿华) 1,5   

  

  1. 1 State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
    2 State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, People’s Republic of China
    3 Coal to Liquids Chemical Research and Development Center, Shenhua Ningxia Coal Industry Group, Yinchuan 750411, People’s Republic of China
  • Received:2018-03-23 Published:2018-06-20
  • Supported by:

    The project was financially supported by National Natural Science Foundation of China (Nos. 21766026 and 21366026), the Leading Talent Project of Ningxia (No. KJT2016001), the National International Cooperation S & T Project of China (No. 2015DFA40660), the National First- Rate Discipline Construction Project of Ningxia (Chemical Engineering and Technology), and the National Demonstra- tion Center for Experimental Chemistry Education (Ningxia University).

Abstract:

Organic templates P-123 of mesoporous SBA-15 can be effectively removed in a few minutes (4min) by using the dielectric-barrier discharge (DBD) plasma technique at ambient pressure and low gas temperature (around 130°C). The mesoporous SBA-15 was characterized by FT-IR, 29 Si solid sate NMR, TEM, XRD, TGA and N2 adsorption/desorption isotherms. The as-made SBA-15 treated with DBD plasma exhibited a larger surface area of 790 m 2·g −1 with larger pores and microspore volume than samples prepared by using the conventional thermal calcination method (550 °C and 5h, 660 m 2·g −1 ). In addition to less shrinkage of the silica framework, the DBD-prepared SBA-15 showed significantly increased weight loss of 8.3% about 200 °C as compared with that of conventional calcination (5.5%), which is attributed mainly to the dehydroxylation by condensation of silanol groups.

Key words: DBD plasma, SBA-15, elimination of organic template, mesoporous materials