近几年，纳米多孔材料以其优良的物理化学性能应用于催化，分离等多种应用领域。纳米多孔铜（NPCu）因其低廉的成本被广泛用于研究。本实验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，以相同浓度HF溶液加入不同量的PVP为腐蚀液进行去合金化制备纳米多孔铜。并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三天。通过XRD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Cu2O纳米线。随着PVP的量的增加，脱合金化后纳米多孔铜的孔径降低，Cu2O纳米线的SEM形貌发生了变化。最后用制得的Cu2O@NPCu样品对20mg/L的甲基橙进行光催化降解，通过紫外可见吸收光谱分析其光催化性能并对相关的机理做了初步的探讨。

关键词脱合金化纳米多孔铜Cu2O纳米线光催化

Title    Preparation of Cu2O nanowires and their photocatalytic properties

Abstract：In recent years, nano-porous materials with its excellent physical and chemical properties used in catalysis, separation and other applications. Nano-porous copper (NPCu) is widely used for research because of its low cost. In this study, Ti-Zr-Cu-Ni-Sn penta-amorphous alloy strip prepared by copper roll quenching method was used as the precursor alloy, and the same concentration of HF solution was added to different amount of PVP as the etching solution. copper. And the nano-porous copper prepared by dealloying was immersed in anhydrous ethanol for three days. The structure and morphology of the Cu2O nanowires were characterized by XRD and SEM. With the increase of the amount of PVP, the pore size of nano-porous copper decreased and the SEM morphology of Cu2O nanowires changed. Finally, the photocatalytic degradation of 20 mg / L methyl orange was carried out by Cu2O @ NPCu sample. The photocatalytic activity was analyzed by UV-Vis absorption spectroscopy and the related mechanism was discussed preliminarily.

Key word    dealloying,    nanoporous Cu,   Cu2O nanowire,    Photocatalytic property.

目 次

1绪论 1

1.1研究背景 1

1.2脱合金法制备纳米多孔金属的发展历史 2

1.2.1纳米多孔金属材料 2

1.2.2脱合金法简介 3

1.3纳米多孔金属材料的应用 4

1.3.1电化学催化剂 4

1.3.2电化学传感器 5

1.3.3电化学能源系统 5

1.4课题的研究内容 5

2实验方案设计与研究方法 6

2.1实验原料及试剂 6

2.2实验流程 6

2.3实验方法 7

2.3.1钛铜基非晶条带的制备 7

2.3.2脱合金样品的制备及Cu2O纳米线的制备 8

2.3.3Cu2O纳米线的制备 11

2.3.4Cu2O@NPCu的光催化降解实验 8

3实验结果与讨论 9

3.1前驱体的组织结构分析 9

3.2脱合金溶液浓度对纳米多孔结构的形貌及成分影响 10

3.3 Cu2O纳米线的制备及其表征