Investigation on Heterostructured SeO2–TiO2 Nanofluoroprobe for Highly Selective and Sensitive Detection of a Neonicotinoid Insecticide, Imidacloprid in Soil and Water Matrixes

IF 2.6 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Jitesh Kumar, Aarti Sharma, Priti Bansal, Dhiraj Sud, Ritu Rai, Anna Hnydiuk-Stefan
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Abstract

Heterostructured SeO2–TiO2 nanoparticles were used as a highly sensitive and selective fluoroprobe for the detection and determination of neonicotinoid insecticide imidacloprid. The sonication-assisted co-precipitation technique was used to create nanoparticles, which were then characterized using UV–Vis, SEM–EDS, HRTEM, XRD, and TGA. These analyses revealed that the nanoparticles had globular morphology, a crystallite size of 14 nm, a bandgap of 2.45 eV, and stability at high temperatures. Fluorescence emission at 548 nm wavelength exhibits high sensitivity and selectivity for imidacloprid over other pesticides with complete fluorescent quenching at 2 × 10–4 M concentration of imidacloprid. Stern–Volmer equation and thermodynamic parameters applied to the experimental data over a temperature range of 20–50 °C provide the Ksv value in the range of 1.56 × 105 to 2.69 × 105 M−1 and indicate strong interactions, dynamic, spontaneous, and endothermic quenching process. Furthermore, the excellent salient features and notably the unaffected performance even in the presence of various anions, fertilizer, and binary mixture of pesticides often sprayed on plants, will pave the way for the development of rapid, affordable, selective fluoroprobe for onsite monitoring of imidacloprid. The reliability for determination is also examined for spiked soil samples to develop a hybrid SeO2–TiO2 nanoparticles fluoroprobe as a simple alternative to existing techniques for the detection of imidacloprid.

Graphical Abstract

Abstract Image

异质结构 SeO2-TiO2 纳米荧光探针用于高选择性、高灵敏度检测土壤和水基质中的新烟碱类杀虫剂吡虫啉的研究
异质结构的 SeO2-TiO2 纳米粒子被用作一种高灵敏度、高选择性的荧光探针,用于检测和测定新烟碱类杀虫剂吡虫啉。该研究采用超声辅助共沉淀技术制备纳米粒子,然后使用紫外可见光、扫描电镜-电子显微镜(SEM-EDS)、高分辨电镜(HRTEM)、X射线衍射(XRD)和热重分析(TGA)对纳米粒子进行表征。这些分析表明,纳米粒子具有球状形态、14 nm 的结晶尺寸、2.45 eV 的带隙以及在高温下的稳定性。在 548 nm 波长处的荧光发射显示出对吡虫啉的高灵敏度和选择性,在 2 × 10-4 M 浓度的吡虫啉浓度下荧光完全熄灭。将斯特恩-伏尔默方程和热力学参数应用于 20-50 °C 温度范围内的实验数据,得出的 Ksv 值范围为 1.56 × 105 至 2.69 × 105 M-1,表明淬灭过程具有很强的相互作用、动态、自发和内热特性。此外,即使在各种阴离子、肥料和经常喷洒在植物上的农药的二元混合物存在的情况下,其性能也不受影响,这些优异的突出特点将为开发用于现场监测吡虫啉的快速、经济、选择性荧光探针铺平道路。此外,还研究了加标土壤样品的测定可靠性,以开发一种 SeO2-TiO2 纳米粒子混合荧光探针,作为现有吡虫啉检测技术的简单替代品。
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来源期刊
CiteScore
5.40
自引率
0.00%
发文量
104
审稿时长
1.7 months
期刊介绍: International Journal of Environmental Research is a multidisciplinary journal concerned with all aspects of environment. In pursuit of these, environmentalist disciplines are invited to contribute their knowledge and experience. International Journal of Environmental Research publishes original research papers, research notes and reviews across the broad field of environment. These include but are not limited to environmental science, environmental engineering, environmental management and planning and environmental design, urban and regional landscape design and natural disaster management. Thus high quality research papers or reviews dealing with any aspect of environment are welcomed. Papers may be theoretical, interpretative or experimental.
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