Harnessing Novel Zinc(II) Coordination Complex for Green Synthesis of ZnO Nanoparticles Boasting Remarkable Photocatalytic Degradation and Targeted Detection of Cr(VI) and Hg(II) Ions

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2024-09-28 DOI:10.1007/s11270-024-07502-w

Shubham Sharma, Tanuj, Maridula Thakur, Rajesh Kumar, Meena Kumari

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引用次数: 0

Abstract

A novel Zn(II) complex with the composition [Zn((2-Cl)(5-NO₂)C₆H₃CONHO)₂] was synthesized by reacting anhydrous ZnSO₄ with 2-chloro-5-nitrobenzohydroxamate [(2-Cl)(5-NO₂)C₆H₃CONHOK] (KHL) in 1:2 molar ratio in methanol (MeOH) solvent under stirring conditions. Various physicochemical studies, including elemental analysis, molar conductivity measurements, and spectroscopic techniques such as Fourier-transform infrared spectroscopy (FTIR), UV–visible, proton nuclear magnetic resonance (¹H NMR), and carbon-13 nuclear magnetic resonance (¹³C NMR), were conducted to characterize the complex. The bonding via carbonyl and hydroxamic oxygen atoms (O, O coordination), and a distorted tetrahedral geometry around zinc were cautiously proposed based on the experimental data. The zinc hydroxamate complex served as a precursor for the green synthesis of zinc oxide (ZnO) nanoparticles utilizing an extract of Bergera koenigii (curry tree), characterized by XRD, BET, SEM (pre and post degradation), TEM and EDS mapping. The synthesized ZnO nanoparticles demonstrated remarkable photocatalytic activity under UV light assistance, achieving 99.5% and 99.94% degradation of cationic dyes, Malachite green and Fuchsin basic, respectively, within 10 to 15 min. Additionally, ZnO nanoparticles exhibited 98.94% degradation of potassium permanganate (KMnO₄) within 10 to 12 min, showcasing superior photocatalytic efficiency compared to other reported nano photocatalysts. Mineralization tests were conducted using COD (Chemical Oxygen Demand) and TOC (Total Organic Carbon) analyses to enhance the understanding of photodegradation. Furthermore, ZnO nanoparticles displayed efficient and selective sensing for Cr(VI) and Hg(II) ions in the presence of other cations.

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利用新型锌(II)配位复合物绿色合成氧化锌纳米粒子，实现卓越的光催化降解并靶向检测铬(VI)和汞(II)离子

在甲醇（MeOH）溶剂中，在搅拌条件下，无水 ZnSO4 与 2-氯-5-硝基苯甲酰羟肟酸酯 [(2-Cl)(5-NO2)C6H3CONHOK]（KHL）以 1:2 的摩尔比反应，合成了一种成分为 [Zn((2-Cl)(5-NO2)C6H3CONHO)2] 的新型锌（II）配合物。为确定该复合物的特性，进行了各种物理化学研究，包括元素分析、摩尔电导率测量，以及傅立叶变换红外光谱（FTIR）、紫外可见光、质子核磁共振（1H NMR）和碳-13 核磁共振（13C NMR）等光谱技术。根据实验数据，谨慎地提出了通过羰基和羟基氧原子成键（O、O 配位）以及围绕锌的畸变四面体几何结构。羟肟酸锌复合物是利用咖哩树（Bergera koenigii）提取物绿色合成氧化锌（ZnO）纳米粒子的前体，并通过 XRD、BET、SEM（降解前和降解后）、TEM 和 EDS 图谱进行了表征。合成的氧化锌纳米粒子在紫外光辅助下表现出显著的光催化活性，在 10 至 15 分钟内分别实现了 99.5% 和 99.94% 的阳离子染料（孔雀石绿和碱性福欣）降解率。此外，氧化锌纳米粒子在 10 至 12 分钟内对高锰酸钾（KMnO4）的降解率达到 98.94%，与其他已报道的纳米光催化剂相比，显示出更高的光催化效率。利用 COD（化学需氧量）和 TOC（总有机碳）分析进行了矿化测试，以加深对光降解的理解。此外，在其他阳离子存在的情况下，氧化锌纳米粒子对六价铬和二价汞离子显示出高效的选择性传感。

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.