Construction of a novel fluorescent nanocarrier with double hollow shells for pH-controlled release of imidacloprid and its distribution and transport in bok choy

Yi Wang; Meiqing Zhu; Taozhong Shi; Xin Ma; Xiangwei Wu; Qing X. Li; Rimao Hua

Ecotoxicology and Environmental Safety (Nov 2022)

Construction of a novel fluorescent nanocarrier with double hollow shells for pH-controlled release of imidacloprid and its distribution and transport in bok choy

Yi Wang,
Meiqing Zhu,
Taozhong Shi,
Xin Ma,
Xiangwei Wu,
Qing X. Li,
Rimao Hua

Affiliations

Yi Wang: Key Laboratory of Agri-Food Safety of Anhui Province, Department of Pesticide Science, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China
Meiqing Zhu: Key Laboratory of Agri-Food Safety of Anhui Province, Department of Pesticide Science, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China; School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China
Taozhong Shi: Key Laboratory of Agri-Food Safety of Anhui Province, Department of Pesticide Science, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China
Xin Ma: Key Laboratory of Agri-Food Safety of Anhui Province, Department of Pesticide Science, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China
Xiangwei Wu: Key Laboratory of Agri-Food Safety of Anhui Province, Department of Pesticide Science, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China
Qing X. Li: Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East-West Road, Honolulu, HI 96822, USA
Rimao Hua: Key Laboratory of Agri-Food Safety of Anhui Province, Department of Pesticide Science, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China; Corresponding author.

Journal volume & issue: Vol. 246
p. 114132

Abstract

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Nanotechnology has been widely used in the field of pesticides. Integration of nano-pesticides and carbon dot fluorescence can fully utilize the potential for high admission of pesticides on leaves and convenience observation of its distribution and transport in the tissues. In the present study, a fluorescent mesoporous nanosilica with double hollow shells for loading imidacloprid (Im@FL-MSNs) was designed and synthesized. The physical and chemical properties of the imidacloprid nanocarriers were characterized by transmission electron microscopy (TEM), FT-IR spectroscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and N2 adsorption/desorption. When the mass ratio of FL MSNs to imidacloprid is 6:5, Im@FL-MSNs exhibits good fluorescence properties, high loading efficiency (∼30%), great slow-release performance as well as pH controllability. Besides, Im@FL-MSNs can improve the ability of imidacloprid to adhere on the leaf surface of bok choy (Initial contact angled is greater than 80°）. Importantly, Im@FL-MSNs did not reduce the biological activity of imidacloprid (LC50 (95% CI) = 1.43 mg/L). It was able to visually study the absorption and distribution of imidacloprid in bok choy plants, and provide theoretical and technical guidance for pesticide reduction.

Published in Ecotoxicology and Environmental Safety

ISSN: 0147-6513 (Print); 1090-2414 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Technology: Environmental technology. Sanitary engineering: Environmental pollution; Geography. Anthropology. Recreation: Environmental sciences
Website: https://www.journals.elsevier.com/ecotoxicology-and-environmental-safety

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