Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (03): 795-798.doi: 10.3866/PKU.WHXB20100241

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles    

Sol-Gel Preparation of Porous C12A7-Cl- Crystals

SUN Jian-Qiu, GONG Lu, SHEN Jing, LIN Zhou, LI Quan-Xin   

  1. Laboratory of Biomass Clean Energy, Department of Chemical Physics, University of Science&Technology of China, Hefei 230026, P. R. China
  • Received:2009-10-13 Revised:2009-12-03 Published:2010-03-03
  • Contact: LI Quan-Xin E-mail:liqx@ustc.edu.cn

Abstract:

Present study provides an approach to produce porous crystal material of C12A7-Cl- (Ca12Al14O32Cl2) by sol-gel method. Reactants for the gel were Ca(NO3)2·4H2O, Al(NO3)3·9H2O, CaCl2, urea, and ethylene glycol. The mixture solution was stirred for 2-3 h to form the sol, after thermal treatment at 350 ℃, the formed gel was then sintered under flowing argon at 1000 ℃. The prepared porous crystal material was investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA), electron paramagnetic resonance (EPR), and ion chromatography (IC). Results indicated that the C12A7-Cl-material was successfully prepared via sol-gel method and the Cl- anions were the dominant anions stored in the bulk of the material. The emission of Clanions from the C12A7-Cl- surface was detected by time-of-flight mass spectrometry (TOF-MS). Our results show that the sol-gel method can be potentially useful in the development of C12A7-Cl- materials.

Key words: Sol-gel, C12A7-Cl-, Characterization, Emission

MSC2000: 

  • O647