Micro-nanobubble-assisted TiO2/ZnO/rGO nanocomposites for efficient pollutant degradation and antibacterial activity

IF 6.7 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-06-13 DOI:10.1016/j.jwpe.2025.108135

Phoutthideth Phouheuanghong , Ranjith Rajendran , Orawan Rojviroon , Priyadharsan Arumugam , Sanya Sirivithayapakorn , Thammasak Rojviroon

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引用次数: 0

Abstract

In this work, TiO₂/ZnO/rGO (TZR) nanocomposites (NCs) were prepared by hydrothermal methods and systematically evaluated for their photocatalytic and antibacterial activity, aiming at efficient environmental remediation. The physicochemical characteristics of the acquired samples were examined by the use of several methods, including UV–visible spectroscopy, X-ray Diffraction (XRD), X-ray Photo electron Spectroscopy (XPS), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM- EDX), Transmission Electron Microscopy (TEM), Ultraviolet-Visible Diffuse Reflectance Spectroscopy (UV-DRS), and Brunauer-Emmett-Teller (BET) analysis, which confirmed the successful combination of TiO₂, ZnO, and rGO within the composite structure. Photocatalytic performance exposed that the TZR NCs, particularly when combined with micro-nanobubbles (MNB), exhibited notable degradation efficiencies of 99.8 % for Indigo Carmine (IC), 98.73 % for Reactive Black 5 (RB5), and 99.60 % for carbaryl pesticide within 120 min under UVA light irradiation. The presence of micro-nanobubbles (MNB) significantly enhanced dissolved oxygen concentration and reactive oxygen species (ROS) generation, accelerating the pollutant degradation process. Furthermore, the TZR NCs exhibited notable antibacterial activity against Staphylococcus aureus (S.aureus) at 12 mm for 75 μgL⁻¹ and Escherichia coli (E.coli) at 10 mm for 75 μgL⁻¹. This thorough study emphasizes the practical application of TZR NCs photocatalytic devices for effective wastewater treatment, providing a potential dual-action method for reducing both chemical pollutants and microbiological contaminants in aquatic environments.

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微纳气泡辅助TiO2/ZnO/rGO纳米复合材料的高效污染物降解和抗菌活性

本文采用水热法制备了TiO2/ZnO/rGO （TZR）纳米复合材料，并对其光催化和抗菌活性进行了系统评价，以期实现高效的环境修复。利用紫外-可见光谱、x射线衍射（XRD）、x射线光电子能谱（XPS）、傅里叶变换红外光谱（FTIR）、扫描电子能谱（SEM- EDX）、透射电子显微镜（TEM）、紫外-可见漫反射光谱（UV-DRS）和布鲁诺尔-埃米特-泰勒（BET）分析等方法对所得样品的物理化学特性进行了研究。这证实了TiO2、ZnO和rGO在复合结构内的成功结合。光催化性能表明，在UVA光照射120 min内，特别是与微纳米泡（MNB）结合时，对靛蓝红（IC）的降解效率为99.8%，对活性黑5 （RB5）的降解效率为98.73%，对西威因农药的降解效率为99.60%。微纳泡（MNB）的存在显著提高了溶解氧浓度和活性氧（ROS）的生成，加速了污染物的降解过程。此外，对金黄色葡萄球菌（S.aureus）和大肠杆菌（E.coli）的抑菌活性在75 μgL−1时分别为12 mm和10 mm。这项深入的研究强调了TZR NCs光催化装置在有效废水处理中的实际应用，为减少水生环境中的化学污染物和微生物污染物提供了一种潜在的双作用方法。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies