核壳结构SiO_2/SnO_2纳米复合微粒的合成与表征 |
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引用本文: | 陈何国,陈建军,奥坚科·弗拉德米尔.核壳结构SiO_2/SnO_2纳米复合微粒的合成与表征[J].广东化工,2011,38(12):20-22,34. |
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作者姓名: | 陈何国 陈建军 奥坚科·弗拉德米尔 |
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作者单位: | 1. 广州市白云化工实业有限公司,广东广州,510540 2. 乌克兰科学院通用与无机化学所,乌克兰基辅03680 |
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摘 要: | 文章从TEOS出发,先水解制备了纳米二氧化硅微粒,再以五水四氯化锡为锡源,碳酸铵为沉淀剂,通过控制反应条件,用共沉淀法在二氧化硅表面包覆上一层锡化物层,经600℃煅烧2 h后形成了具有核壳结构的SiO2/SnO2纳米复合微粒,并用透射电镜、激光粒度仪、FTIR等手段对其形貌、结构、组成进行了表征。结果表明:形成的核壳结构SiO2/SnO2纳米复合微粒是以二氧化硅为核,氧化锡为壳,内核直径约为120 nm,壳层厚度为8~18 nm;氧化锡基本以成膜包覆为主,伴有部分氧化锡自身成核团聚。
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关 键 词: | 核壳结构 SiO2/SnO2 复合微粒 |
Synthesis and Characterization of Core-Shell Structure SiO_2/SnO_2 Nanocomposite Particles |
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Affiliation: | Chen Heguo1Chen Jianjun1,Ogenko Volodymyr2(1.Guangzhou Baiyun Chemical Industry Co.,Ltd.,Guangzhou 510540,China; 2.Institute of General and Inorganic Chemistry,NAS,Kiev,Ukraine 03680) |
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Abstract: | Nano silica was synthesized through tetraethylorthosilicate(TEOS) hydrolysis.Core-shell structure SiO2/SnO2 nanocomposite particles were successfully prepared by controlled reaction factors and using chemical precipitation method with tin tetrachloride as tin resource,ammonium carbonate as precipitating agent and calcinated at 600 ℃ for 2 h.The morphology,structure and composition of aformentioned SiO2/SnO2 nanocomposite particles were characterized by TEM,EADX,laser particle size analysis,Infrared spectrometry et.al.The results demonstated that the morphology of obtained core-shell structure SiO2/SnO2 nanocomposite particles is using silica(diameter=120 nm) as core and SnO2 as shell.The thickness of SnO2 shell is about 8~18 nm.New generated SnO2 can be primarily coated onto the surface of silica with small proportion aggregation. |
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Keywords: | core-Shell structure SiO2/SnO2 composite particle |
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