Nanomaterials Research Group, School of Natural Sciences and Technology, Universidad Ana G. Méndez-Gurabo Campus, PR, 00778, USA.
Department of Applied Physics and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain.
J Environ Manage. 2019 Oct 1;247:822-828. doi: 10.1016/j.jenvman.2019.07.005. Epub 2019 Jul 10.
Water contamination has compromised the quality of this resource during the last years with the presence of persistent organic pollutants. Because of the resistance of these compounds to degradation, several advance oxidation techniques have been proposed. In this study, we report the employment of an advance oxidation technique in the degradation of benzophenone-4 (BP-4), using TiO as catalyst, which was obtained following a fast-hydrothermal method. TiO nanowires (TiONWs) were fully characterized considering the morphology, elemental composition, oxidation states, vibrational modes and crystalline structure with SEM and TEM, EDS, XPS, FTIR and XRD, respectively. The photocatalytic degradation was carried out using a home-made photoreactor under slightly acidic conditions achieving an average of 90% removal. It was determined that the photocatalysis is the most probable route of degradation since the photolysis or catalysis procedures produce negligible contributions. An apparent kinetic constant of 1.29 × 10 min was determined, according to a pseudo-first order reaction.
在过去的几年中，由于持久性有机污染物的存在，水污染已经影响了该资源的质量。由于这些化合物具有抗降解性，因此已经提出了几种高级氧化技术。在这项研究中，我们报告了使用 TiO 作为催化剂，采用快速水热法获得的苯并三唑-4（BP-4）降解的高级氧化技术。通过 SEM 和 TEM、EDS、XPS、FTIR 和 XRD 分别对 TiO 纳米线（TiONWs）的形貌、元素组成、氧化态、振动模式和晶体结构进行了充分的表征。在微酸性条件下，使用自制的光反应器进行光催化降解，平均去除率达到 90%。确定光催化是最可能的降解途径，因为光解或催化过程产生的贡献可以忽略不计。根据准一级反应，确定了 1.29×10-2 min 的表观动力学常数。
