Advancing photocatalytic efficiency of Mn2+-doped ZnSe nanoparticles for sustainable water treatment: removal of toxic organic pollutants

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-06-28 DOI:10.1016/j.mseb.2025.118542

Vineet Sharma , Deepak Kumar , Mohan Singh Mehata

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Abstract

This study highlights the development and evaluation of synthesized pure and manganese-doped zinc selenide (Mn@ZnSe) nanoparticles (NPs) as photocatalysts for sustainable wastewater treatment, aligning with sustainable development goals. The NPs were synthesized using a low-temperature colloidal method in direct aqueous medium, utilizing sodium borohydride as a reducing agent for selenium powder. The optical properties of the NPs were analyzed through UV/Vis and photoluminescence (PL) spectroscopy. The UV/Vis spectrum indicated an absorption peak at 380 nm, while PL analysis revealed broad emissions at 450 nm (ZnSe defect states) and 580 nm (Mn-related emissions). X-ray diffraction patterns confirmed a cubic zinc blend crystal structure with high crystallinity. Scanning electron microscopy and high-resolution transmission electron microscopy showed that the NPs had uniform sphere-like morphology. The photocatalytic efficiency of the NPs was tested using CV dye solution under an 8 W UV radiation source with a wavelength of 254 nm. Results indicated that Mn@ZnSe NPs exhibited two-fold higher photocatalytic activity compared to pure ZnSe NPs, with a first-order kinetic rate constant of 0.041 min⁻¹. This research underscores the potential of Mn@ZnSe NPs as efficient, sustainable photocatalysts for wastewater treatment, offering insights into scalable practices for environmental remediation.

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Mn2+掺杂ZnSe纳米粒子在可持续水处理中的光催化效率提升：去除有毒有机污染物

本研究重点研究了纯合成和掺杂锰的硒化锌纳米粒子（Mn@ZnSe）作为可持续废水处理光催化剂的开发和评价，符合可持续发展的目标。以硼氢化钠为硒粉的还原剂，在直接水介质中采用低温胶体法制备NPs。通过紫外/可见光谱和光致发光（PL）光谱分析了NPs的光学性质。紫外/可见光谱显示在380 nm处有一个吸收峰，而PL分析显示在450 nm （ZnSe缺陷态）和580 nm （mn相关发射）处有广泛的发射。x射线衍射图证实了一种具有高结晶度的立方锌混合晶体结构。扫描电镜和高分辨率透射电镜显示NPs具有均匀的球状形貌。采用CV染料溶液，在波长为254 nm的8 W紫外光源下测试了NPs的光催化效率。结果表明，Mn@ZnSe NPs的光催化活性比纯ZnSe NPs高2倍，一级动力学速率常数为0.041 min−1。这项研究强调了Mn@ZnSe NPs作为废水处理的高效、可持续光催化剂的潜力，为环境修复的可扩展实践提供了见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.