Preparation and properties of Ni/ZnO by sol-gel process

• Main Authors: Yeh, Yu-Yang, 葉羽陽
• Other Authors: Teoh, Lay-Gaik
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/34671886036490766284

碩士 === 國立屏東科技大學 === 機械工程系所 === 103 === Zinc oxide is a N-type semiconductor material, in the visible region has good optical and electrical properties, is widely used in solar cells, photocatalysis and other related fields. It is very suitable as photocatalyst materials because of their non-toxic, high performance, low cost and easy doping. However, zinc oxide is a wide bandgap semiconductor, it can only absorb ultraviolet light. In addition, electrons and holes easier recombination, it showed poor photocatalytic activity in the sunlight. This study will use the triblock copolymer as a natural template, zinc nitrate as the precursors, and using a sol-gel method to preparat prepare nickel doped zinc oxide. Then, structural analysis (XRD, SEM, TEM) and photocatalytic analysis to investigate the structure and the degradation efficiency of samples. From the experimental results, it is found that the as-prepared materials in this study all are the wurtzite structure, and particle size about 24~36 nm. The introduction of nickel can inhibit the grain growth of zinc oxide. Maximum solid solubility of nickel in the zinc oxide is 0.02, when exceeded will begin to precipitate nickel oxide. In the photocatalysis experiments, it is found that when calcination temperature is at 550 ℃ of experimental powder, when the nickel-doped zinc oxide had been synthesized that the content of nickel is at 0.08 , which is the best degradation efficiency in this study.