| Co3O4／Fe2O3核-壳粒子的制备及光学性能研究 | |
| Alternative Title | Preparation of Co3O4/Fe2O3 Core-Shell Particles and Their Optic Properties |
| 张霞1; 赵岩2; 张彩碚1; 李艳华3 | |
| 2005 | |
| Source Publication | 东北大学学报：自然科学版
 |
| ISSN | 1005-3026 |
| Volume | 26.0Issue:012Pages:1200-1203 |
| Abstract | 在单分散准球形α—Fe2O3纳米颗粒的悬浮液中，在氨碱催化下，COCl2水解产生的Co（OH）2沉积在α—Fe2O3纳米颗粒表面，形成核-壳粒子．经500℃热处理后，壳层物质晶化为立方晶系Co3O4，壳层厚度约为6nm．不同的氨碱液对核-壳结构产生影响，在1mol·L^-1尿素溶液的催化下，得到均匀的核-壳结构．应用TEM和XRD分析了产物结构，并利用UV-Vis光谱对复合材料的光吸收特性进行了研究．与α-Fe2O3纳米颗粒的吸收光谱比较，在光激发下，Co3O4／Fe2O3核-壳粒子光吸收特性发生改变，在可见光区产生新的强吸收峰． |
| Other Abstract | The amorphous Co（OH）2 obtained from the hydrolysis of CoCl2 under the catalysis of ammoniac base could be deposited on the surface of monodispersed pseudo-spherical α-Fe2O3 nanoparticles to form core-shell particles. After the heat treatment at 500 ℃, the structure of shell layer crystallized into cubic Co3O4 with a thickness about 6 nm. Different ammoniac bases and their concentrations would affect the structure of the core-shell particles, and it became homogeneous if catalyzed in 1 mol· L^-1 urea solution. TEM and XRD were used to analyze the structure of the core-shell particles. Compared to pure a-Fe2O3 nanoparticles, the UV-Vis spectrum of the core-shell particles showed that their optic properties were changed under photoexeitation and a new absorption peak with maximum absorbanee appeared in visible region. |
| Keyword | 单分散 准球形α-Fe2O3 Co3O4／Fe2O3 核-壳粒子 表面包覆 紫外-可见吸收光谱 |
| Indexed By | CSCD |
| Language | 中文 |
| CSCD ID | CSCD:2163987 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/147070 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.东北大学 2.中国科学院金属研究所 3.大连大学 |
| Recommended Citation GB/T 7714 | 张霞,赵岩,张彩碚,等. Co3O4／Fe2O3核-壳粒子的制备及光学性能研究[J]. 东北大学学报：自然科学版,2005,26.0(012):1200-1203. |
| APA | 张霞,赵岩,张彩碚,&李艳华.(2005).Co3O4／Fe2O3核-壳粒子的制备及光学性能研究.东北大学学报：自然科学版,26.0(012),1200-1203. |
| MLA | 张霞,et al."Co3O4／Fe2O3核-壳粒子的制备及光学性能研究".东北大学学报：自然科学版 26.0.012(2005):1200-1203. |
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