Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (03): 689-696.doi: 10.3866/PKU.WHXB20110335

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Synthesis of Micro/Mesoporous Composites and Their Application as CO2 Adsorbents

MA Yan-Hui, ZHAO Hui-Ling, TANG Sheng-Jie, HU Jun, LIU Hong-Lai   

  1. Laboratory for Advanced Materials οf Ministry of Education, Department of Chemistry, East China University of Science and Technology, Shanghai 200237, P. R. China
  • Received:2010-09-21 Revised:2010-12-20 Published:2011-03-03
  • Contact: HU Jun E-mail:junhu@ecust.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20736002, 20776045), National High Technology Research and Development Program of China (863) (2008AA062302), and Program for Changjiang Scholars and Innovative Research Team in University of China (IRT0721).

Abstract:

We synthesized a series of micro/mesoporous composites of S-β-MCM41(c), P-β-MCM41(c), P-ZSM-MCM41(c), P-ZSM-C through a two-step crystallization process. During this process, the microporous zeolite precursor solution (S) or the zeolite powder (P) was first synthesized and treated with NaOH solution with different concentration (c), and then the mesopores were induced by hexadecyltrimethyl- ammoniumbromide (CTAB) as a soft template or mesoporous carbon as a hard template. The effects of the type of inorganic precursor, the base concentration, and the type of mesoporous template on the structure and property of the micro/mesoporous composites were investigated. The results of X-ray diffraction (XRD), transmission electron microscopy (TEM), and nitrogen adsorption-desorption isotherms showed that the products contained micropores and mesopores, simultaneously. The CO2 adsorption capacities of these micro/mesoporous composites were obviously improved compared to the pure microporous or mesoporous materials. Among them, P-ZSM-MCM41(2) had the highest CO2 adsorption capacity of 1.51 mmol·g-1, which was almost twice that of the original ZSM-5.

Key words: Micro/mesoporous composite material, CO2 adsorption, Dual-template, Two-step crystallization, Basic solution concentration

MSC2000: 

  • O647