| In the past few years, the research of photocatalysis on organic pollutant has been very active due to the background of energy utilization and environmengtal protection, which has many advantages such as normal temperature and pressure, complete decomposition and avoidance of secondary pollution. Among many semiconductor photocatalysis materials, nano ZnO, as a typical N-type seminductor, has bigger specific surface area and broader energy band than ordinary particles, which caused more than hundred times of photocatalysis efficiency. Additionally, increase of specific surface area is effective to promote photocatalysis efficiency. Therefore in this article nano ZnO/Ag composites were prepared first via chemical plating, then the photocatalysis efficiency was studied by means of photocatalytic degradation experiment of methylene blue. The full article is divided into 6 sections:1, The performance and preparation methods of nano ZnO were introduced at every point, basing on which the content and direction of our research were advanced.2, The medicine and equipments in the experiment and the instruments in the test were introduced.3, One-dimension nano ZnO was prepared via hydro-thermal method, the appearance and growing conditions were analyzed to get full- grown and regular nano ZnO.4, One-dimension nano ZnO/Ag composites were prapared via chemical plating.XRD patterns and TEM photos were analyzed to ensure successful chemical plating.5, The photocatalysis efficiency of One-dimension nano ZnO/Ag composites was studied by means of photocatalytic degradation experiment of methylene blue. The mechanism of reaction was analyzed through theoretical analysis.6, All the results in the experiment were generalized. |
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