Photocatalytic degradation of propranolol hydrochloride in aqueous medium employing bentonite-TiO2 nanocomposites

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-10 DOI:10.1016/j.jphotochem.2024.116080

Tamires Pereira Rosa , Gustavo Lopes Colpani , Márcio Antônio Fiori , Noemi Raquel Checca Huaman , Giane Gonçalves Lenzi , Michel Zampieri Fidelis , Onelia Aparecida Andreo dos Santos , Rodrigo Brackmann

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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.

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利用膨润土-二氧化钛纳米复合材料光催化降解水介质中的盐酸普萘洛尔

盐酸普萘洛尔是一种广泛使用的药物，由于不能被人体完全代谢，因此会污染水体。传统的水处理方法对其无效，因此需要采用异相光催化等更先进的方法。二氧化钛通常被用作光催化剂，它通常与其他材料结合形成纳米复合材料，从而提高其活性。本研究评估了通过溶胶-凝胶法合成的二氧化钛与有机膨润土在去除普萘洛尔方面的效果。复合材料是通过溶胶热处理制备的，实验设计评估了TiO2/膨润土的比例、溶胶热处理的时间和温度对光催化活性的影响。提高这些参数可使纳米复合材料在吸附 60 分钟后进行 150 分钟的光催化，从而去除水中 99% 以上的普萘洛尔。经过四个处理周期后，该纳米复合材料仍然保持活性。表征结果显示，TiO2（锐钛型）纳米粒子的尺寸范围为 6-13 纳米，分散在膨润土的细管状结构中。这项研究强调了基于 TiO2 的纳米复合材料在有效解决水体药物污染方面的潜力。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

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.