TAILIEUCHUNG - Báo cáo hóa học: "Solvothermal Synthesis of Ternary Sulfides of Sb2 (x 5 0.4, 1) with 3D Flower-Like Architectures"

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: Solvothermal Synthesis of Ternary Sulfides of Sb2 (x 5 , 1) with 3D Flower-Like Architectures | Nanoscale Res Lett 2010 5 364-369 DOI S11671-009-9489-1 NANO EXPRESS Solvothermal Synthesis of Ternary Sulfides of Sb2 - xBixS3 x 5 1 with 3D Flower-Like Architectures Jiquan Sun Xiaoping Shen Lijun Guo Guoxiu Wang Jinsoo Park Kun Wang Received 19 May 2009 Accepted 31 October 2009 Published online 13 November 2009 to the authors 2009 Abstract Flower-like nanostructures of Sb2 _ xBixS3 x were successfully prepared using both antimony diethyldithiocarbamate Sb DDTC 3 and bismuth diethyldithiocarbamate Bi DDTC 3 as precursors under solvothermal conditions at 180 C. The prepared Sb2 _ xBixS3 with flower-like 3D architectures were characterized by X-ray diffraction XRD scanning electron microscopy SEM energy dispersive X-ray spectrometry EDS high-resolution transmission electron microscopy HRTEM and selected area electron diffraction SAED . The flower-like architectures with an average diameter of 4 m were composed of single-crystalline nanorods with orthorhombic structures. The optical absorption properties of the Sb2 _ xBixS3 nanostructures were investigated by UV-Visible spectroscopy and the results indicate that the Sb2 _ xBixS3 compounds are semiconducting with direct band gaps of and eV for x and respectively. On the basis of the experimental results a possible growth mechanism for the flower-like Sb2 _ xBixS3 nanostructures is suggested. Keywords Nanostructures Semiconductor Ternary sulfide Solvothermal Optical properties J. Sun X. Shen El L. Guo K. Wang School of Chemistry and Chemical Engineering Jiangsu University 212003 Zhenjiang China e-mail xiaopingshen@ G. Wang J. Park School of Mechanical Materials and Mechatronics Engineering University of Wollongong Wollongong NSW 2522 Australia Introduction Semiconductor nanocrystals have attracted much attention in the past few decades 1 2 . Among them binary chalcogenide semiconductors of the AỴeỴ1 type A Sb Bi E S Se Te have aroused great interest due to their potential .

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