Propranolol hydrochloride degradation using La@TiO2 functionalized with CMCD

• 作者: Gustavo Lopes Colpani Vitor Follmann Santos Rubieli Carla Frezza Zeferino Micheli Zanetti Josiane Maria Muneron de Mello Luciano Luiz Silva Natan Padoin Regina de Fátima Peralta Muniz Moreira Márcio Ant?nio Fiori Cíntia Soares
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2022,（4）
• 所属期刊栏目: RARE EARTH CATALYSIS
• 页码范围: 579-585
• 页数: 7页
• 语种: 英文

摘要

Propranolol hydrochloride can be considered a persistent and bioaccumulative pharmaceutical in the environment.This drug and its by-products are potentially toxic and have adverse effects,since these compounds have been associated with endocrine-disrupting effects,reproductive deficiencies,embryo abnormalities and pericardial oedema.TiO2-La 0.05％-carboxymethyl-β-cyclodextrin(CMCD)nano-particles were successfully prepared by a simple two-step method,which consists of sonification and functionalization.The characterization analyses reveal that lanthanum is dispersed on the semi-conductor surface,probably forming Ti-O-La bonds,which can induce oxygen vacancies and surface defects that effectively restrain the recombination of photogenerated electron/holes pairs.The efficiency of TiO2-La 0.05％-CMCD samples in degradation of propranolol under UV-light irradiation is higher than that of pristine TiO2 within 20 min reaction,probably due to complex formation between the β-blocker and the oligosaccharide,which allows us to propose a photocatalytic mechanism based on the formation of intermediates and competition of these compounds to the radicals and CMCD cavities.