【摘要】 利用离子渗镀和真空热氧化复合处理技术,在不锈钢表面制备成分结构可控的TiO2薄膜。借助图像分析仪、辉光放电光谱分析仪(GDOES)和X射线衍射仪对薄膜进行表征与分析。以苯酚废水为对象进行了光催化降解试验,对比研究了不锈钢基材TiO2薄膜与商品TiO2粉末的光催化活性。结果表明:在400~600℃工艺温度范围,不锈钢表面均形成了致密、均匀的锐钛矿型TiO2薄膜,且Ti、O元素呈梯度分布;TiO2薄膜具有较高的光催化活性,3h内降解率达74.5%。更多还原

【Abstract】 TiO2 films with excellent bonding strength were fabricated on stainless steel substrate by plasma surface alloying and thermal oxidation duplex processing. Controllable elemental distribution and structure of the films could be achieved at 400–600℃. The films were characterized by metallography, glow discharge spectrometer (GDOES) and X-ray diffraction. The results show that the TiO2 films are of dense and uniform anatase. The Ti and O contents of the films are in gradient distribution. Phenol-containing wastewater was used to test photo-catalytic performance of the films. The TiO2 films have a degradation rate of phenol of about 73.5% in 3 h, much higher than commercial products of TiO2 powders.更多还原