One-dimensional copper sulfide nanowires growth by hydrothermal synthesis assisted anode aluminum oxide template

• Main Authors: Shih-Kai Hsu, 徐士凱
• Other Authors: Sheng-Chang Wang
• Format: Others
• Language: zh-TW
• Published: 100
• Online Access: http://ndltd.ncl.edu.tw/handle/00418324568632463623

碩士 === 南台科技大學 === 奈米科技研究所 === 99 === Copper sulfides, CuS is a p-type semiconductor, which exhibits wurzite structure and energy gap of 2 eV. Under the temperature of 1.6K, CuS will transform into a superconductor. Copper sulfide has potential applications in numerous fields, such as p-type semiconductors in solar cell devices, room-temperature ammonia gas seneor, cathode material for lithium ion batteries, etc. In this study, copper sulphide nanowires arrays were synthesized using hydrothermal method assisted with anodic aluminum oxide template of the thesis can divide into three parts. In the first part, we prepared anodic aluminum oxide template using solution of oxalic acid. The results shown that the diameter of pore size increased as the voltage increases, and the spacing of the pore increased. , The pore density prepared in higher voltage is larger than that of low voltage. When the anodization time increased, the thickness of alumina layer and the spacing of the pore are increased, but the pore size becomes smaller. If the time of barrier layer remove is longer, it will make pore size increases in the second anodizing step, and reducing the distance between pores and pores. By the above three parameter control, preparation of the required size is of the AAO template. In the second part, we synthesized the copper sulfide nanostructures by hydrothermal method without assisted of AAO template. Synthesis of The results shown that the copper sulfide nanostructures is flower-like or nanorod structure of the crystals. The XRD shows that hydrothermal method can be successfully synthesized copper sulfide nano-crystalline, by the concentration 0.01M CuCl2•2H2O and Na2S2O3•5H2O mixed solution. In the third part, the anodic alumina template was used in hydrothermal to synthesize the copper sulfide nanowire arrays. The copper sulfide nanowires are growth in the AAO pores, the diameter is about 100 nm. Using XRD and TEM analysis, the results shows that the crystallinity of the copper sulfide nanowires increases as the reaction temperature increases. The optical properties of the CuS nanowire arrays are characterized. In summary, we success to synthesize the copper sulphide nanowire arrays in various pore size via hydrothermal process assisted by anodic aluminum oxide template. Synthesis of the application of the materials for photovoltaic and solar cellswere evaluated.