Žener Boštjan, Matoh Lev, Carraro Giorgio, Miljević Bojan, Cerc Korošec Romana
Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia.
Department of Chemical Sciences, University of Padova, Via Francesco Marzolo 1, 35131 Padova, Italy.
Beilstein J Nanotechnol. 2018 Jun 4;9:1629-1640. doi: 10.3762/bjnano.9.155. eCollection 2018.
Titanium dioxide photocatalysts have received a lot of attention during the past decades due to their ability to degrade various organic pollutants to CO and HO, which makes them suitable for use in environmental related fields such as air and water treatment and self-cleaning surfaces. In this work, titania thin films and powders were prepared by a particulate sol-gel route, using titanium tetrachloride (TiCl) as a precursor. Afterwards, the prepared sols were doped with nitrogen (ammonium nitrate, urea), sulfur (thiourea) and platinum (chloroplatinic acid), coated onto glass substrates by dip-coating, and thermally treated in a muffle furnace to promote crystallization. The resulting thin films were then characterized by various techniques (i.e., TGA-DSC-MS, XRD, BET, XPS, SEM, band gap measurements). The photocatalytic activity of the prepared thin films was determined by measuring the degradation rate of plasmocorinth B (PB), an organic pigment used in the textile industry, which can pose an environmental risk when expelled into wastewater. A kinetic model for adsorption and subsequent degradation was used to fit the experimental data. The results have shown an increase in photocatalytic activity under visible-light illumination of nonmetal and metal doped and co-doped titania thin films compared to an undoped sample.
在过去几十年中，二氧化钛光催化剂因其能够将各种有机污染物降解为二氧化碳和水而备受关注，这使得它们适用于与环境相关的领域，如空气和水处理以及自清洁表面。在这项工作中，以四氯化钛（TiCl）为前驱体，通过颗粒溶胶 - 凝胶法制备了二氧化钛薄膜和粉末。之后，将制备的溶胶用氮（硝酸铵、尿素）、硫（硫脲）和铂（氯铂酸）进行掺杂，通过浸涂法涂覆在玻璃基板上，并在马弗炉中进行热处理以促进结晶。然后通过各种技术（即热重 - 差示扫描量热 - 质谱联用仪、X射线衍射仪、比表面积分析仪、X射线光电子能谱仪、扫描电子显微镜、带隙测量）对所得薄膜进行表征。通过测量纺织工业中使用的有机颜料浆状 Corinth B（PB）的降解率来确定制备薄膜的光催化活性，当PB排放到废水中时会对环境造成风险。使用吸附和后续降解的动力学模型来拟合实验数据。结果表明，与未掺杂样品相比，非金属和金属掺杂及共掺杂的二氧化钛薄膜在可见光照射下光催化活性有所提高。
