一种新型珊瑚结构 TiO2/Ti 薄膜电极用于光电催化降解活性艳红。
A new coral structure TiO2/Ti film electrode applied to photoelectrocatalytic degradation of Reactive Brilliant Red.
机构信息
Institute of Ecological and Environmental Materials, School of Environment and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.
出版信息
J Hazard Mater. 2009 Dec 15;172(1):256-61. doi: 10.1016/j.jhazmat.2009.06.166. Epub 2009 Jul 8.
A novel structure TiO2/Ti film was prepared on a titanium matrix using anodic oxidation technique and applied to degrade Reactive Brilliant Red (RBR) dye in simulative textile effluents. The film was characterized by Field-Emission Scanning Electron Microscope (FE-SEM), Laser Micro-Raman Spectrometer (LMRS), UV-vis spectrophotometer (UVS) and Photoelectrocatalytic (PEC) experiment. The results show that the surface morphology of the film is coral structure, and the crystal structure of the film is anatase. The absorbency of the coral structure TiO2/Ti film is 87-93% in the UV light region, and 77-87% in the visible light region. PEC experiment indicates that the photocurrent density of the coral structure TiO2/Ti film electrode achieves 160 microA/cm(2). The color and Chemical Oxygen Demand (COD) removal efficiencies of RBR achieve 73% and 60% in 1h, respectively. These are 16% and 58% higher than those of nanotube TiO2/Ti film electrode. These were attributed to that these electrodes with different surface morphologies exhibit distinct surface areas and light absorption rate.
采用阳极氧化技术在钛基体上制备了一种新型结构的 TiO2/Ti 薄膜，并将其应用于模拟纺织废水中的活性艳红（RBR）染料的降解。采用场发射扫描电子显微镜（FE-SEM）、激光微拉曼光谱仪（LMRS）、紫外可见分光光度计（UVS）和光电催化（PEC）实验对薄膜进行了表征。结果表明，薄膜的表面形貌为珊瑚状结构，薄膜的晶体结构为锐钛矿相。珊瑚状结构 TiO2/Ti 薄膜在紫外光区的吸收率为 87-93%，在可见光区的吸收率为 77-87%。PEC 实验表明，珊瑚状结构 TiO2/Ti 薄膜电极的光电流密度达到 160 μA/cm2。在 1 h 内，RBR 的颜色和化学需氧量（COD）去除效率分别达到 73%和 60%，分别比纳米管 TiO2/Ti 薄膜电极高 16%和 58%。这归因于具有不同表面形貌的这些电极具有不同的比表面积和光吸收率。
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