tailieunhanh - Báo cáo hóa học: " Template Synthesis of Three-Dimensional Cubic Ordered Mesoporous Carbon With Tunable Pore Sizes"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Template Synthesis of Three-Dimensional Cubic Ordered Mesoporous Carbon With Tunable Pore Sizes | Nanoscale Res Lett 2010 5 103-107 DOI s11671-009-9450-3 NANO EXPRESS Template Synthesis of Three-Dimensional Cubic Ordered Mesoporous Carbon With Tunable Pore Sizes Weijie Dai Mingbo Zheng Yu Zhao Shutian Liao Guangbin Ji Jieming Cao Received 30 July 2009 Accepted 24 September 2009 Published online 14 October 2009 to the authors 2009 Abstract Three-dimensional cubic ordered mesoporous carbons with tunable pore sizes have been synthesized by using cubic Ia3d mesoporous KIT-6 silica as the hard template and boric acid as the pore expanding agent. The prepared ordered mesoporous carbons were characterized by powder X-ray diffraction scanning electron microscopy transmission electron microscopy and nitrogen adsorption-desorption analysis. The results show that the pore sizes of the prepared ordered mesoporous carbons with three-dimensional cubic structure can be regulated in the range of nm. A simplified model was proposed to analyze the tailored pore sizes of the prepared ordered mesoporous carbons on the basis of the structural parameters of the silica template. Keywords Template synthesis Mesoporous carbon Mesoporous silica Pore size control KIT-6 Introduction In recent years ordered mesoporous carbons OMCs with uniform pore sizes high surface areas and large pore volumes have been of wide interest for applications in W. Dai M. Zheng Y. Zhao S. Liao G. Ji J. Cao H Nanomaterials Research Institute College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics 210016 Nanjing People s Republic of China e-mail jmcao@ Y. Zhao Key Laboratory of Mesoscopic Chemistry of MOE and Jiangsu Provincial Laboratory for Nano Technology Department of Chemistry Nanjing University 210093 Nanjing People s Republic of China many fields such as catalyst supports adsorbents fuel cells and electrodes for supercapacitors 1-3 . The hard template method has been successfully developed in the synthesis of OMCs. Since the emergence of .