本文關鍵詞：納米多孔銅基板上氧化亞銅納米線的制備及其光催化性能研究　出處：《南京理工大學》2017年碩士論文　論文類型：學位論文

  更多相關文章： 脫合金法 納米多孔銅 氧化亞銅納米線 光催化性能

【摘要】：隨著納米技術的快速發(fā)展,納米多孔金屬材料在分離、催化和能源領域都展現(xiàn)出極大的應用潛力。納米多孔貴金屬性能優(yōu)異,但較高的成本大大限制了它在工業(yè)上應用,而納米多孔銅(NPCu)因其低廉的成本吸引了眾多科研工作者的目光。氧化亞銅(Cu_2O)作為一種典型的P型窄帶隙半導體,對太陽光的利用率較高,是一種很有發(fā)展前景的光催化半導體材料。據(jù)此,本文展開了以下工作:(1)采用銅輥急冷法制備的Ti-Zr-Cu-Ni-Sn五元非晶合金條帶作為前驅(qū)體合金,以不同濃度HF溶液為腐蝕液,在不同條件下進行化學脫合金化,制備納米多孔銅。研究發(fā)現(xiàn),隨著脫合金化溫度的升高,時間的延長,腐蝕液濃度的提高,納米多孔銅的孔徑和韌帶也在增加和粗化,探討了脫合金法制備納米多孔銅的機制。(2)以脫合金化制備的納米多孔銅為基體,將其浸泡在無水乙醇中一段時間。通過XRD、XPS及SEM等對其結構和形貌進行表征發(fā)現(xiàn),在納米多孔銅的表面生成了長徑比較大的Cu_20納米線,隨著浸泡時間的增加,Cu_2O納米線增多且粗化。對Cu_2O納米線的生長機理做了初步探討。(3)用制得的NPCu@Cu_2O樣品對已知濃度的甲基橙和亞甲基藍溶液進行光催化降解,通過紫外可見吸收光譜分析其光催化性能。結果表明,NPCu@Cu_2O在可見光下對甲基橙和亞甲基藍降解均有較好的光催化活性,并對相關的機理做了初步的探討。
[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.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TB383.1;O643.36

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