Enhanced sunlight-driven photocatalytic activity of (Cu, TM) (TM = Mg, Mn, Ag) dual-doped ZnS quantum dots for multi-dye degradation and improved reusability through PVA polymer Integration

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

Materials Science and Engineering: B Pub Date : 2025-02-21 DOI:10.1016/j.mseb.2025.118139

S. Murugan, M. Ashokkumar

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Abstract

This study investigates the potential of transition metal-doped ZnS quantum dots (QDs) for solar energy harvesting, focusing on their large surface area and unique optical properties. Using a simple co-precipitation method, Cu-doped and (TM, Cu) dual-doped ZnS QDs were synthesized, with TM representing Mg, Mn, and Ag. Comprehensive characterization, including XRD, TEM, EDAX, XPS, and UV–Vis spectroscopy, confirmed successful doping and the cubic phase of ZnS, with crystallite sizes between 1.39 and 1.60 nm. The doping enhanced the band gaps due to quantum confinement, ranging from 3.65 to 4.09 eV. We focused on photocatalytic degradation of crystal violet dye, where (Ag, Cu) dual-doped QDs showed 99 % efficiency in 100 min. Kinetic analysis identified these QDs as superior, with a high rate constant and short half-life. Additionally, an innovative PVA/QDs membrane demonstrated degradation efficiencies of 62 % to 95 %, showing promise for environmental cleanup under solar illumination.

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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.