{"title":"Photocatalytic degradation of propranolol hydrochloride in aqueous medium employing bentonite-TiO2 nanocomposites","authors":"","doi":"10.1016/j.jphotochem.2024.116080","DOIUrl":null,"url":null,"abstract":"<div><div>Propranolol hydrochloride, a widely used medication, contaminates water bodies as it’s not fully metabolized by humans. Conventional water treatment methods are ineffective against it, necessitating more advanced approaches like heterogeneous photocatalysis. TiO<sub>2</sub>, often used as a photocatalyst, is typically combined with other materials to form nanocomposites, enhancing its activity. This study evaluated TiO<sub>2</sub> synthesized via sol–gel method with organophilized bentonite for propranolol removal. Composites were prepared through solvothermal treatment, and an experimental design assessed the TiO<sub>2</sub>/bentonite ratio, time, and temperature of the solvothermal treatment effects on photocatalytic activity. Increasing these parameters led to a nanocomposite capable of removing over 99 % of propranolol in water after 60 min of adsorption followed by 150 min of photocatalysis. The nanocomposite remained active after four treatment cycles. Characterization revealed TiO<sub>2</sub> (anatase) nanoparticles with a size range of 6–13 nm dispersed in bentonite’s fine tubular structures. This research underscores the potential of TiO<sub>2</sub>-based nanocomposites in addressing pharmaceutical contamination in water bodies efficiently.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":null,"pages":null},"PeriodicalIF":4.1000,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Photochemistry and Photobiology A-chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1010603024006245","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Propranolol hydrochloride, a widely used medication, contaminates water bodies as it’s not fully metabolized by humans. Conventional water treatment methods are ineffective against it, necessitating more advanced approaches like heterogeneous photocatalysis. TiO2, often used as a photocatalyst, is typically combined with other materials to form nanocomposites, enhancing its activity. This study evaluated TiO2 synthesized via sol–gel method with organophilized bentonite for propranolol removal. Composites were prepared through solvothermal treatment, and an experimental design assessed the TiO2/bentonite ratio, time, and temperature of the solvothermal treatment effects on photocatalytic activity. Increasing these parameters led to a nanocomposite capable of removing over 99 % of propranolol in water after 60 min of adsorption followed by 150 min of photocatalysis. The nanocomposite remained active after four treatment cycles. Characterization revealed TiO2 (anatase) nanoparticles with a size range of 6–13 nm dispersed in bentonite’s fine tubular structures. This research underscores the potential of TiO2-based nanocomposites in addressing pharmaceutical contamination in water bodies efficiently.
期刊介绍：
JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds.
All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor).
The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.
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