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Adsorption and release of biocides with mesoporous silica nanoparticles

Popat, A. and Liu, J. and Hu, Q. H. and Kennedy, M. and Peters, B. and Lu, G. Q. and Qiao, S. Z. (2012) Adsorption and release of biocides with mesoporous silica nanoparticles. Nanoscale, 4 (3). pp. 970-975. ISSN 2040-3364

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Article Link(s): http://dx.doi.org/10.1039/c2nr11691j

Abstract

In this proof-of-concept study, an agricultural biocide (imidacloprid) was effectively loaded into the mesoporous silica nanoparticles (MSNs) with different pore sizes, morphologies and mesoporous structures for termite control. This resulted in nanoparticles with a large surface area, tunable pore diameter and small particle size, which are ideal carriers for adsorption and controlled release of imidacloprid. The effect of pore size, surface area and mesoporous structure on uptake and release of imidacloprid was systematically studied. It was found that the adsorption amount and release profile of imidacloprid were dependent on the type of mesoporous structure and surface area of particles. Specifically, MCM-48 type mesoporous silica nanoparticles with a three dimensional (3D) open network structure and high surface area displayed the highest adsorption capacity compared to other types of silica nanoparticles. Release of imidacloprid from these nanoparticles was found to be controlled over 48 hours. Finally, in vivo laboratory testing on termite control proved the efficacy of these nanoparticles as delivery carriers for biopesticides. We believe that the present study will contribute to the design of more effective controlled and targeted delivery for other biomolecules.

Item Type:Article
Business groups:Horticulture and Forestry Science
Additional Information:Popat, Amirali Liu, Jian Hu, Qiuhong Kennedy, Michael Peters, Brenton Lu, Gao Qing (Max) Qiao, Shi Zhang
Subjects:Plant pests and diseases > Pest control and treatment of diseases. Plant protection
Science > Biology > Biochemistry
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Deposited On:25 Feb 2014 04:02
Last Modified:25 Feb 2014 04:02

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