(1. 西安理工大學 材料科學與工程學院，西安 710048；
2. 哈爾濱工業(yè)大學 材料科學與工程學院，哈爾濱 150001)
摘 要: 采用電解液修飾法，利用微弧氧化技術直接在鋁基體上制備CuO/Al2O3微弧氧化復合膜層，研究復合膜層表面元素的結合狀態(tài)以及電參數(shù)對復合化膜層表面形貌和孔徑的影響，探討復合膜層對甲基橙溶液的催化降解作用。結果表明：利用微弧氧化技術可一步制備出CuO/A12O3復合膜層，且CuO晶格氧含量可達33.7%(質量分數(shù))；隨著電壓、占空比的增大和頻率的減小，復合膜層表面微孔的孔徑增加，孔數(shù)目減少，粗糙程度增加；復合膜層在常溫常壓下催化10 h可使甲基橙溶液降解率達到70%左右。
關鍵字: 鋁基體；微弧氧化；CuO/Al2O3；催化濕式氧化
（1. School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China;
2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China）
Abstract:The micro-arc oxidation technology was employed to directly prepare a CuO/Al2O3 composite coating film on an alunimium substrate, which was also modified by doping electrolyte. The properties of CuO/Al2O3 coating film were investigated focusing on the adhesion of different elements on the coating surface, the effect of electrical parameters on the surface morphologies and the pore diameter, and the catalytic degradation of methyl orange by CuO/Al2O3 composite film was also investigated. The results show that micro-arc oxidation technology can be introduced to prepare a CuO/Al2O3 composite film. The content of oxygen reaches 33.7% in the CuO lattice. The pore diameter and number of the composite film are seriously influenced by the electrical parameters. With the increase of the voltage and the duty ratio (φ) and the decrease of the frequency, the surface pore diameter and roughness of the composite film increase, while the number of holes decrease. The degradation rate of methyl orange reaches 70% by the catalysis of the CuO/Al2O3 composite coating film for 10 h at ordinary temperatures and pressures.
Key words: aluminium substrate; micro-arc oxidation; CuO/Al2O3; catalytic wet oxidation
