纳米多孔铜基板上氧化亚铜纳米线的制备及其光催化性能研究

发布时间：2018-01-05 21:46

本文关键词：纳米多孔铜基板上氧化亚铜纳米线的制备及其光催化性能研究　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着纳米技术的快速发展,纳米多孔金属材料在分离、催化和能源领域都展现出极大的应用潜力。纳米多孔贵金属性能优异,但较高的成本大大限制了它在工业上应用,而纳米多孔铜(NPCu)因其低廉的成本吸引了众多科研工作者的目光。氧化亚铜(Cu_2O)作为一种典型的P型窄带隙半导体,对太阳光的利用率较高,是一种很有发展前景的光催化半导体材料。据此,本文展开了以下工作:(1)采用铜辊急冷法制备的Ti-Zr-Cu-Ni-Sn五元非晶合金条带作为前驱体合金,以不同浓度HF溶液为腐蚀液,在不同条件下进行化学脱合金化,制备纳米多孔铜。研究发现,随着脱合金化温度的升高,时间的延长,腐蚀液浓度的提高,纳米多孔铜的孔径和韧带也在增加和粗化,探讨了脱合金法制备纳米多孔铜的机制。(2)以脱合金化制备的纳米多孔铜为基体,将其浸泡在无水乙醇中一段时间。通过XRD、XPS及SEM等对其结构和形貌进行表征发现,在纳米多孔铜的表面生成了长径比较大的Cu_20纳米线,随着浸泡时间的增加,Cu_2O纳米线增多且粗化。对Cu_2O纳米线的生长机理做了初步探讨。(3)用制得的NPCu@Cu_2O样品对已知浓度的甲基橙和亚甲基蓝溶液进行光催化降解,通过紫外可见吸收光谱分析其光催化性能。结果表明,NPCu@Cu_2O在可见光下对甲基橙和亚甲基蓝降解均有较好的光催化活性,并对相关的机理做了初步的探讨。
[Abstract]:With the rapid development of nanotechnology, nano-porous metal materials have shown great potential in separation, catalysis and energy fields. The nano-porous precious metals have excellent performance. However, higher costs greatly limit its industrial application. Nano-porous copper (NPCU) has attracted the attention of many researchers because of its low cost. Cuprous oxide (Cu2OO) is a typical P-type narrow-band gap semiconductor. The utilization rate of solar light is high, so it is a promising photocatalytic semiconductor material. In this paper, the following work has been carried out: (1) Ti-Zr-Cu-Ni-Sn pentacrystalline alloy strip prepared by rapid cooling of copper roll is used as precursor alloy, and HF solution of different concentration is used as corrosion solution. Nano-porous copper was prepared by chemical dealloying under different conditions. It was found that the concentration of corrosion solution increased with the increase of temperature and time. The pore size and ligaments of nano-porous copper are also increasing and coarsening. The mechanism of preparing nano-porous copper by dealloying method is discussed. After immersion in ethanol for a period of time, Cu_20 nanowires with large length and diameter were found to be formed on the surface of nano-porous copper by XRDX XPS and SEM. With the increase of soaking time. The growth mechanism of Cu_2O nanowires was discussed. The methyl orange and methylene blue solution with known concentrations were degraded by photocatalytic degradation of the NPCu@Cu_2O sample. The photocatalytic activity of NPCu @ CuS _ 2O was analyzed by UV-Vis absorption spectra. The results showed that NPCu@ CuS _ 2O had better photocatalytic activity for the degradation of methyl orange and methylene blue under visible light. The related mechanism is also discussed.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB383.1;O643.36

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