ZnO nanoparticles synthesis by sacrificial composite monolith method and enhanced photocatalytic degradation of methylene blue dye

Sustainable Chemistry for the Environment Pub Date : 2025-10-10 DOI:10.1016/j.scenv.2025.100295

Rahul Chaudhari , Madhuri Adhale , Abhishek Bhapkar , Mangesh Desai , Shekhar Bhame , Shrikrishna Sartale , Sujata Kasabe , Chetan Bhongale

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Abstract

ZnO nanoparticles have been successfully synthesized by thermally decomposing composite monolith of Zn and chitosan. XRD, FT-IR, FE-SEM, EDX, and UV-Visible spectroscopy have been used to characterize the synthesized nanoparticles. The synthesized material was found to possess the hexagonal wurtzite phase. These ZnO nanoparticles were subjected to photocatalytic investigations through the degradation of Methylene Blue (MB) dye under UV irradiation. The influence of various factors, such as initial concentration of dye, catalyst loading, time of contact, and pH on the photodegradation of methylene blue dye were investigated. Photodegradation experiments showed that the highest degradation of about 94.8 % was achieved within 180 min with catalyst loading 0.4 g/L. Photocatalysis experiments follow a pseudo first-order reaction kinetics. The photodegradation mechanism is also discussed in detail.

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牺牲复合单体法制备ZnO纳米颗粒及增强亚甲基蓝染料的光催化降解

通过热分解锌和壳聚糖复合单体，成功地合成了氧化锌纳米颗粒。利用XRD， FT-IR, FE-SEM， EDX和uv -可见光谱对合成的纳米颗粒进行了表征。合成的材料具有六方纤锌矿相。通过紫外辐射降解亚甲基蓝（MB）染料，对ZnO纳米颗粒进行了光催化研究。考察了染料初始浓度、催化剂负载、接触时间和pH等因素对亚甲基蓝染料光降解的影响。光降解实验表明，当催化剂负载为0.4 g/L时，在180 min内达到最高降解率94.8 %。光催化实验遵循伪一级反应动力学。并对其光降解机理进行了详细讨论。

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来源期刊

Sustainable Chemistry for the Environment

CiteScore

0.40

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0.00%

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