Adsorption and release of biocides with mesoporous silica nanoparticles

Popat, Amirali, Liu, Jian, Hu, Qiuhong, Kennedy, Michael, Peters, Brenton, Lu, Gao Qing (Max) and Qiao, Shi Zhang (2012) Adsorption and release of biocides with mesoporous silica nanoparticles. Nanoscale, 4 3: 970-975. doi:10.1039/c2nr11691j

Author Popat, Amirali
Liu, Jian
Hu, Qiuhong
Kennedy, Michael
Peters, Brenton
Lu, Gao Qing (Max)
Qiao, Shi Zhang
Title Adsorption and release of biocides with mesoporous silica nanoparticles
Journal name Nanoscale   Check publisher's open access policy
ISSN 2040-3364
Publication date 2012
Year available 2011
Sub-type Article (original research)
DOI 10.1039/c2nr11691j
Open Access Status Not Open Access
Volume 4
Issue 3
Start page 970
End page 975
Total pages 6
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Collection year 2012
Language eng
Formatted 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.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes First published on the web 06 Dec 2011

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