CONTROLLED RELEASE OF FERTILISER USING MESOPOROUS SILICA NANOPARTICLES

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dc.contributor.author Wanyika, H.
dc.contributor.author Gatebe, E.
dc.contributor.author Kioni, P.
dc.contributor.author Tang, Z.
dc.contributor.author Gao, Y.
dc.date.accessioned 2017-04-21T11:31:02Z
dc.date.available 2017-04-21T11:31:02Z
dc.date.issued 2017-04-21
dc.identifier.isbn 9966 923 28
dc.identifier.uri http://journals.jkuat.ac.ke/index.php/jscp/index
dc.identifier.uri http://hdl.handle.net/123456789/2957
dc.description.abstract Nanostructured delivery systems for fertilizers could minimize leaching and consequently reduce the amounts applied. In this study, Mesoporous Silica Nanoparticles (MSNs) were explored as controlled release carriers for fertilizers. A series of MSNs with particle sizes, Barrett-Joyner-Halenda (BJH) pore diameters, Brunauer-Emmett- Teller (BET) surface areas and BJH total pore volumes ranging between 50 nm – 900 nm, 2.4 nm - 4.4 nm, 589 m2g-1 - 1013 m2g-1 and 0.61 cm3g-1 – 0.81 cm3g-1 respectively were synthesized via Liquid Crystal Templating Mechanism (LCT). Urea was used as a model fertilizer to access the fertilizer loading and controlled release behaviour of MSNs. Loading was achieved by a simple immersion technique using concentrated aqueous urea solution. As much as 19.8 % - 78.2 % of the MSNs surface areas and 16.8 % - 99.0 % of the mesopore volumes were loaded with urea molecules, mainly by physisorption. In vitro release studies of urea-loaded MSNs (UMSNs) in water indicated a burst release (32 % - 91 %) within the 1st day attributed to the urea adsorbed on the external surfaces, followed by a slow and sustained release for up to 6 days when all urea was released (100 %), ascribed to urea molecules entrapped in the mesopores. The release profiles were found to vary with the physical properties of MSNs. Great potential for the development of fertilizer nanocarrier systems based on MSNs was revealed. en_US
dc.description.sponsorship JKUAT en_US
dc.language.iso en en_US
dc.publisher JKUAT en_US
dc.relation.ispartofseries Scientific Conference Proceedings;2011
dc.subject controlled release (CR) en_US
dc.subject urea-loaded MSNs (UMSNs) en_US
dc.subject Mesoporous silica nanoparticles (MSNs) en_US
dc.title CONTROLLED RELEASE OF FERTILISER USING MESOPOROUS SILICA NANOPARTICLES en_US
dc.type Article en_US


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