Citation: XU Li-Li, ZHOU Mei-Ting, YANG A-Long, WANG Jia-Xing, ZHOU Tian-Fu, ZHANG Ying. Preparation of Dumbbell-like Magnetic Gold Mesoporous Silicon Microspheres and Determination of Magnetic/Photo Thermo and Catalytic Performance[J]. Chinese Journal of Inorganic Chemistry, ;2019, 35(6): 971-977. doi: 10.11862/CJIC.2019.132 shu

Preparation of Dumbbell-like Magnetic Gold Mesoporous Silicon Microspheres and Determination of Magnetic/Photo Thermo and Catalytic Performance

Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China

Corresponding author: ZHANG Ying, zhangying@syphu.edu.cn
Received Date: 7 November 2018
Revised Date: 19 April 2019

Figures(7)

For the sake of tumor diagnosis and treatment integration, the magnetic gold nanocomposite (Au-Fe₃O₄) with magnetic thermo, photo thermo, and catalysis properties, was prepared by epitaxial oxidation and growth of iron oxide with gold nanoparticles as seeds and coated with the mesoporous silica layer (Au-Fe₃O₄@mSiO₂) using cetyltrimethyl ammonium bromide (CTAB) and F127 as two template agents by sol-gel method. The prepared Au-Fe₃O₄ nanoparticles were dumbbell type with good single dispersion, uniform size distribution and particle size of 12~15 nm. When the magnetic field current increased from 25.5 to 42.5 A, heating rate of the sample (25 mg·mL^-1) increased from 0.39 to 0.76℃·min^-1. When the laser density increased from 0.3 to 1.2 W·cm^-2, the temperature of the solution (25 mg·mL^-1) increased from 0.69 to 2℃·min^-1. Both the magneto thermal and photo thermal properties of Au-Fe₃O₄@mSiO₂ composites were directly proportional to the concentration and the strength of the external magnetic field/density of laser irradiation. The photo thermal property of the composite was better than that of magneto thermal property. The catalytic release of NO by the Au-Fe₃O₄@mSiO₂ complex (25 mg·mL^-1 in S-nitrosoglutathione (GSNO)) reached a sustained and stable release within 60 min, with a maximum amount of 9.743 μmol·L^-1.
- metal-matrix composite,
- thermal performance,
- heating rate,
- magnetic gold nanocomposite,
- catalytic performance
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