1. Synthesis of 'lotus root'-like mesoporous titanium dioxide and its effects on UV response to aconitine release
- Author
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Zongxiao Li, Ye Liu, Zhejunyu Jin, Weiwei Zhao, Kaining Ding, and Fei-zhou Li
- Subjects
Isothermal microcalorimetry ,Lotus root ,Chemistry ,Mechanical Engineering ,Enthalpy ,Metals and Alloys ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,Ultraviolet visible spectroscopy ,Mechanics of Materials ,Titanium dioxide ,Materials Chemistry ,Aconitine ,Irradiation ,0210 nano-technology ,Mesoporous material ,Nuclear chemistry - Abstract
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
- Published
- 2019
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