哑铃型磁金介孔硅复合微球的制备及磁/光热催化性能测定
Preparation of Dumbbell-like Magnetic Gold Mesoporous Silicon Microspheres and Determination of Magnetic/Photo Thermo and Catalytic Performance
作者单位E-mail
许丽丽 沈阳药科大学, 基于靶点的药物设计与研究教育部重点实验室, 沈阳 110016  
周妹婷 沈阳药科大学, 基于靶点的药物设计与研究教育部重点实验室, 沈阳 110016  
杨阿龙 沈阳药科大学, 基于靶点的药物设计与研究教育部重点实验室, 沈阳 110016  
王家幸 沈阳药科大学, 基于靶点的药物设计与研究教育部重点实验室, 沈阳 110016  
周天夫 沈阳药科大学, 基于靶点的药物设计与研究教育部重点实验室, 沈阳 110016  
张莹 沈阳药科大学, 基于靶点的药物设计与研究教育部重点实验室, 沈阳 110016 zhangying@syphu.edu.cn 
摘要: 以金纳米粒为种子采取外延氧化生长氧化铁的方式,制备了哑铃型磁金纳米复合材料(Au-Fe3O4);以十六烷基三甲基溴化铵(CTAB)和F127为双模板剂通过溶胶凝胶法进一步包覆了介孔二氧化硅层(Au-Fe3O4@mSiO2)。所制备Au-Fe3O4纳米粒子呈哑铃型,单分散性较好,尺寸分布均一,粒径为12~15 nm。Au-Fe3O4@mSiO2复合物磁热性能与浓度和外加磁场强度成正比;浓度为25 mg·mL-1时,磁场电流从25.5 A增大到42.5 A,溶液升温速率从0.39℃·min-1增大到0.76℃·min-1。Au-Fe3O4@mSiO2复合物光热性能与浓度和激光照射功率密度成正比;复合物浓度为25 mg·mL-1时,功率密度从0.3 W·cm-2增大到1.2 W·cm-2,溶液升温速率从0.69℃·min-1增大到2℃·min-1。相同浓度的复合物溶液,光热性能明显优于磁热性能。浓度为25 mg·mL-1的Au-Fe3O4@mSiO2复合物催化S-亚硝基谷胱甘肽(GSNO)释放NO的反应在60 min时达到持续稳定释放,释放量最大为9.743 μmol·L-1
关键词: 金属基复合材料  热性能  升温速率  磁金纳米复合物  催化性能
基金项目: 国家自然科学基金资助项目(No.81401501)、辽宁省高等学校优秀人才支持计划资助(No.LJQ2015110)、沈阳药科大学中青年教师事业发展支持计划(No.ZQN2015013)、沈阳药科大学创新创业训练计划项目(No.20180163082)资助。
Abstract: 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.
Keywords: metal-matrix composite  thermal performance  heating rate  magnetic gold nanocomposite  catalytic performance
投稿时间:2018-11-07 修订日期:2019-04-19
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许丽丽,周妹婷,杨阿龙,王家幸,周天夫,张莹.哑铃型磁金介孔硅复合微球的制备及磁/光热催化性能测定[J].无机化学学报,2019,35(6):971-977.
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