Synthesis of “lotus root”-like mesoporous titanium dioxide and its effects on UV response to aconitine release

Mesoporous titanium dioxide with a “lotus root”-like structure was synthesized for the first time using an improved template-free method. The structure has a BET (Brunauer Emmett Teller) surface area of 688.11 m2/g, a pore volume of 0.743 cm3/g, and a pore size of 3.59 nm. Aconitine, a botanical ins...

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Bibliographic Details
Published in:Journal of alloys and compounds 2019-03, Vol.777, p.285-293
Main Authors: Liu, Ye, Zhao, Wei-wei, Ding, Kai-ning, Jin, Zhe-jun-yu, Li, Zong-xiao, Li, Fei-zhou
Format: Article
Language:English
Subjects:
Computer simulation
Drug delivery systems
Enthalpy
Hydrogen bonding
Irradiation
Monte Carlo simulations
Pesticides
Pore size
Porosity
Titanium
Titanium dioxide
Ultraviolet radiation
UV-Responsed drug release
“Lotus root”-like mesoporous titanium dioxide
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Summary:Mesoporous titanium dioxide with a “lotus root”-like structure was synthesized for the first time using an improved template-free method. The structure has a BET (Brunauer Emmett Teller) surface area of 688.11 m2/g, a pore volume of 0.743 cm3/g, and a pore size of 3.59 nm. Aconitine, a botanical insecticide, could be loaded onto the mesoporous titanium dioxide via simply soaking the structure and had a maximum loading of 17.6%. UV spectroscopy was utilized to explore the drug release behaviors, and the results showed that aconitine-loaded mesoporous titanium dioxide particles UV irradiated could successfully release aconitine with a release rate of 46.24%, which was significantly higher than the samples lacking UV irradiation (36.80%). Meanwhile, the release rate of aconitine (48.94%) for pH 5.5 was significantly higher than that for pH 7.0 (42.09%). The results of microcalorimetry revealed that both the enthalpy change (ΔH) and entropy change (ΔS) were negative (ΔH 
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.10.388