阳极氧化黄铜构建纳米片氧化物薄膜及其光电化学性能

Preparation of Nanosheet Copper Oxide Films by Anodic Oxidation of a Brass and Their Photoelectrochemical Performance

摘要: 在55℃的1.0~10.0 mol∙L⁻¹ NaOH溶液中，通过10 mA∙cm⁻²恒电流阳极氧化和空气中150℃热处理，在黄铜基底表面制备出具有纳米颗粒或纳米片形貌的铜氧化物薄膜。利用XRD、SEM和Raman光谱等分析了氧化膜的结构和形貌。在0.1 mol∙L⁻¹ Na₂SO₄溶液中测试了氧化膜在零偏压下的可见光光电流。结果表明，黄铜在3.0~5.0 mol∙L⁻¹的NaOH溶液中经阳极氧化，可制备出具有纳米片形貌的Cu2O/CuO复合氧化物薄膜，在零偏压下的光电流密度分别为1.9和1.4 μA∙cm⁻²。

Abstract: Copper oxide films with nanoparticles or nanosheets morphologies were prepared on the surface of brass substrates through anodic oxidation of the brass at 10 mA∙cm⁻² in 1.0 - 10.0 mol∙L⁻¹ NaOH solutions, at 55˚C, then heated at 150˚C in air. The structures and morphologies of the oxide films were analysed with XRD, SEM and Raman spectroscopy. The photocurrents of the films were tested in 0.1 mol∙L⁻¹ Na₂SO₄ solution under a visible light and zero bias. Results show that nanosheet CuO/Cu2O composite films can be obtained by anodic oxidation of the brass in 3.0 - 5.0 mol∙L⁻¹ NaOH solutions, and the films generate the photocurrents of 1.9 and 1.4 μA∙cm⁻², respectively, at zero bias.