Efficient photocatalytic degradation of pharmaceutical pollutants using CZTS nanoparticles

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science and Engineering: B Pub Date : 2025-07-01 Epub Date: 2025-03-26 DOI:10.1016/j.mseb.2025.118239

Vaishnavi Umbrajkar , Manali Kaladagi , Abhinay Mandawade , Sagar Khater , Haribhau Gholap , Maya Khater

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Abstract

Pharmaceutical and antibiotic effluents pose environmental risks, including water pollution and antibiotic resistance. This study investigates an eco-friendly nanotechnology approach using irradiated and non-irradiated Cu₂ZnSnS₄ (CZTS) nanoparticles (NPs) for wastewater treatment. CZTS NPs were synthesized via a one-step hydrothermal method. X-ray diffraction confirmed their tetragonal kesterite structure, while optical analysis indicated a 1.74 eV band gap. Photoluminescence spectroscopy showed a peak at 801 nm, suggesting minimal electron-hole recombination. HRTEM and FESEM confirmed spherical NPs (5–10 nm), and EDAX/XPS verified elemental composition and oxidation states. Photocatalytic degradation of pharmaceuticals, including linezolid, was optimized for pH, temperature, time, and agitation. Optimal conditions (pH 7, 45 °C, 120 RPM) achieved up to 86.97 % degradation. Radical scavenging assays confirmed hydroxyl and proton radicals’ involvement. CZTS NPs showed enhanced reusability, with degradation efficiency increasing from 49.09 % to 80.08 % over three cycles, demonstrating their potential for sustainable wastewater treatment.

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纳米CZTS光催化降解药物污染物的研究

制药和抗生素流出物构成环境风险，包括水污染和抗生素耐药性。本研究探讨了一种利用辐照和非辐照Cu2ZnSnS4 （CZTS）纳米粒子（NPs）处理废水的环保纳米技术。采用一步水热法合成了CZTS纳米粒子。x射线衍射证实了它们的四方kesterite结构，光学分析表明其带隙为1.74 eV。光致发光光谱在801 nm处显示出峰值，表明电子-空穴复合最小。HRTEM和FESEM证实了球形NPs (5-10 nm)， EDAX/XPS证实了元素组成和氧化态。光催化降解药物，包括利奈唑胺，优化了pH，温度，时间和搅拌。最佳条件（pH 7, 45°C, 120 RPM）可实现高达86.97%的降解。自由基清除试验证实了羟基和质子自由基的参与。在三个循环过程中，CZTS NPs的降解效率从49.09%提高到80.08%，显示了其可持续废水处理的潜力。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.