ZnO/TiO2 photocatalytic nanocomposite for dye and bacteria removal in wastewater

IF 1.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Express Pub Date : 2024-08-21 DOI:10.1088/2053-1591/ad6bf2

Hanh Thi Truong, Hai Bang Truong, Thuan Chi Nguyen

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Abstract

This study investigates ZnO/TiO₂ nanocomposites synthesized by the sol–gel method for their potential application in textile wastewater treatment. The physicochemical properties of these materials were comprehensively characterized using various analytical techniques, including transmission electron microscopy (TEM), x-ray diffraction (XRD) analysis, x-ray fluorescence (XRF) spectroscopy, Brunauer–Emmett–Teller (BET) surface area analysis, and UV–visible (UV-Vis) spectroscopy. XRD and XRF analyses confirmed the formation of a ZnO/TiO₂ heterostructure. TEM images revealed a quasi-spherical morphology with slight agglomeration. The ZnO/TiO₂ nanocomposite with a 1:5 molar ratio of Zn(II):Ti(IV) showed the highest BET surface area (91.345 m² g⁻¹) and the narrowest band gap (Eg = 3.06 eV). This composite demonstrated efficient degradation of methylene blue dye under sunlight irradiation and exhibited 100% antibacterial activity against S. typhi and S. aureus at concentrations ≥5 mg ml⁻¹, indicating its potential for treating textile wastewater.

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用于去除废水中染料和细菌的 ZnO/TiO2 光催化纳米复合材料

本研究探讨了通过溶胶-凝胶法合成的 ZnO/TiO2 纳米复合材料在纺织废水处理中的潜在应用。研究采用了多种分析技术，包括透射电子显微镜（TEM）、X 射线衍射（XRD）分析、X 射线荧光（XRF）光谱、布鲁诺-艾美特-泰勒（BET）表面积分析和紫外-可见（UV-Vis）光谱，对这些材料的理化性质进行了综合表征。XRD 和 XRF 分析证实了氧化锌/二氧化钛异质结构的形成。TEM 图像显示了略有团聚的准球形形态。ZnO/TiO2 纳米复合材料的 Zn(II):Ti(IV)摩尔比为 1:5，显示出最高的 BET 表面积（91.345 m2 g-1）和最窄的带隙（Eg = 3.06 eV）。该复合材料在阳光照射下可高效降解亚甲基蓝染料，在浓度≥5 mg ml-1 时对伤寒杆菌和金黄色葡萄球菌具有 100% 的抗菌活性，表明其具有处理纺织废水的潜力。

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来源期刊

Materials Research Express MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.50

自引率

4.30%

发文量

640

审稿时长

12 weeks

期刊介绍： A broad, rapid peer-review journal publishing new experimental and theoretical research on the design, fabrication, properties and applications of all classes of materials.