ZnO-doped kaolin nanoclay immobilized agar biopolymer for 2,4-dinitrophenol photocatalytic degradation

IF 1.8 4区工程技术 Q3 Chemical Engineering

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-08-20 DOI:10.1002/apj.3144

Imran Hasan, Akshara Bassi, Parvathalu Kalakonda, Kushal Kanungo

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引用次数: 0

Abstract

This study focuses on enhancing the properties of kaolin (Kao) clay by incorporating Zinc oxide nanoparticles (ZnO NPs) and further functionalizing with agar biopolymer, resulting in the formation of Agar/Kao@ZnO nanocomposite (NC). The synthesized material underwent comprehensive composition, structure, surface, and optical properties analysis to confirm the formation. The material was evaluated as a photocatalyst for the degradation of 2,4-dinitrophenol (DNP) under visible light irradiation. The optimized conditions for the photocatalytic degradation of DNP were determined as irradiation time 50 minutes, pH 4, catalyst dose 20 mg, and DNP concentration of 25 mg L⁻¹, resulting in degradation efficiency of 99.63%. Trapping experiment validated the significant role of hydroxyl (^•OH) radicals as reactive oxidant species (ROS) in the degradation of DNP in the presence of visible light. Through four consecutive cycles of reusability experiments, it was confirmed that the synthesized material is highly stable and efficient for DNP degradation.

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掺杂氧化锌的高岭土纳米粘土固定琼脂生物聚合物用于 2,4- 二硝基苯酚的光催化降解

本研究的重点是通过在高岭土（Kao）中加入氧化锌纳米粒子（ZnO NPs）并进一步与琼脂生物聚合物官能化，从而提高高岭土（Kao）的性能，最终形成琼脂/Kao@ZnO纳米复合材料（NC）。对合成的材料进行了全面的成分、结构、表面和光学特性分析，以确认其形成。在可见光照射下，对该材料作为光催化剂降解 2,4-二硝基苯酚（DNP）进行了评估。光催化降解 DNP 的优化条件为：辐照时间 50 分钟、pH 值 4、催化剂剂量 20 毫克、DNP 浓度 25 毫克/升，降解效率为 99.63%。诱捕实验验证了羟基（-OH）自由基作为活性氧化物种（ROS）在可见光存在下降解 DNP 的过程中发挥了重要作用。通过连续四个循环的可重复使用性实验，证实了合成材料对 DNP 降解的高度稳定性和高效性。

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

Asia-Pacific Journal of Chemical Engineering 工程技术-工程：化工

CiteScore

3.50

自引率

11.10%

发文量

111

审稿时长

2.8 months

期刊介绍： Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration. Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).