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《Acta Scicentiarum Naturalum Universitis Pekinesis》 2001-02
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A Study of Nanocrystalline CdS Prepared in Waterglass Medium

LIU Xiaoheng\ LIANG Chunxiang\ LI Dan\ YANG Xujie\ LU Lude\ WANG Xin (Materials Chemistry Laboratory,Nanjing University of Science and Technology,Nanjing,210094)  
At room temperature,Cd(NO 3) 2 solution was dropped in the quickly stirred aqueous solution consisted of Na 2S and waterglass.After the mixture was stirred for 6h,the powders of nanocrystalline CdS were obtained by careful washing and filtering,which were characterized by XRD,TEM and absorption spectrometer.It was found that the average particle diameter(1 4~3 7?nm) of CdS powders is controlled by waterglass concentrations,prevailing crystal system whose particles were wrapped by non\|crystal CdS belongs to wurtzite phase and the related optical band gap reaches 3.1?eV.It was assumed that the non\|crystal CdS wrapped on crystal CdS can result in red\|shifted luminescence for absorption spectrum.
【Fund】: 教育部博士点基金 !(1999 2 0 0 1)资助项目
【CateGory Index】: O614
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