Green-synthesized Ag-Ag2S Heterostructures for efficient catalytic remediation of 4-Nitrophenol

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-08-18 DOI:10.1016/j.materresbull.2025.113732

Shreepooja Bhat , T.K. Nanditha , Namitha B , Rajashekhar Pujar , Srivathsava Surabhi , S.C. Gurumurthy

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Abstract

The contamination of water bodies by toxic dyes such as 4-nitrophenol (4-NP) presents a critical environmental challenge, driving the need for efficient and sustainable remediation strategies. This study investigates the synthesis and catalytic performance of Ag-Ag₂S alloy nanoparticles (NPs) prepared via green and conventional chemical routes. Structural and morphological characterizations confirmed the successful formation of the alloy phase through both methods. The green-synthesized NPs exhibited a smaller average size (∼5 nm) compared to chemically synthesized ones (∼23 nm), which contributed to their enhanced catalytic activity. In reduction experiments, the green-synthesized Ag-Ag₂S NPs achieved a high reduction efficiency of 84 % within 6 min, significantly outperforming the chemically synthesized NPs, which reached only 54.6 % efficiency in 21 min. The findings highlight the superior catalytic potential of green-synthesized Ag-Ag₂S nanoparticles and underscore their promise as eco-friendly nanocatalysts for wastewater treatment applications.

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绿色合成Ag-Ag2S异质结构高效催化修复4-硝基苯酚

4-硝基酚（4-NP）等有毒染料对水体的污染是一个严峻的环境挑战，需要有效和可持续的修复策略。研究了绿色和常规化学途径制备的Ag-Ag2S合金纳米颗粒（NPs）的合成及其催化性能。组织和形态表征证实了这两种方法成功地形成了合金相。与化学合成的NPs （~ 23 nm）相比，绿色合成的NPs的平均尺寸（~ 5 nm）更小，这有助于增强其催化活性。在还原实验中，绿色合成的Ag-Ag2S NPs在6 min内的还原效率高达84%，明显优于化学合成的NPs，后者在21 min内的还原效率仅为54.6%。这些发现突出了绿色合成的Ag-Ag2S纳米颗粒的优越催化潜力，并强调了它们作为废水处理应用的环保纳米催化剂的前景。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.