Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/76216
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Type: Journal article
Title: Adsorption and release of biocides with mesoporous silica nanoparticles
Author: Popat, A.
Liu, J.
Hu, Q.
Kennedy, M.
Peters, B.
Lu, G.
Qiao, S.
Citation: Nanoscale, 2012; 4(3):970-975
Publisher: Royal Society of Chemistry
Issue Date: 2012
ISSN: 2040-3364
2040-3372
Statement of
Responsibility: 
Amirali Popat, Jian Liu, Qiuhong Hu, Michael Kennedy, Brenton Peters, Gao Qing (Max) Lu and Shi Zhang Qiao
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.
Keywords: Animals; Isoptera; Silicon Dioxide; Nitro Compounds; Imidazoles; Delayed-Action Preparations; Disinfectants; Insecticides; Microscopy, Electron, Transmission; Drug Delivery Systems; Insect Control; Adsorption; Nanotechnology; Nanoparticles; Neonicotinoids
Rights: This journal is © The Royal Society of Chemistry 2012
RMID: 0020120518
DOI: 10.1039/C2NR11691J
Appears in Collections:Chemical Engineering publications

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