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离子组装法构建磷灰石梯度涂层 李保强1,贾德昌1,周玉1,王永亮1 (1.哈尔滨工业大学,黑龙江,哈尔滨,150001) 摘要:为了把磷灰石引入到壳聚糖材料表面,以无需任何表面功能化改性的壳聚糖水凝胶为模板,在温和条件下采用离子组装法在壳聚糖表面构建了磷灰石涂层,通过IR,XRD和SEM表征了磷灰石涂层的组成,形貌和分布规律.结果表明,采用离子组装法在壳聚糖表面形成的磷灰石为含碳酸根磷灰石(CHA),其Ca/P=2.0.在碱处理的条件下,镶嵌在壳聚糖基质中的无定形磷酸钙转变为CHA,壳聚糖水凝胶为磷酸钙提供形核位点和反应介质.CHA涂层中钙元素和磷元素含量呈现从表面向中心逐步降低,显示CHA涂层呈现梯度分布. 关键词:磷灰石; 壳聚糖; 离子组装; 矿化; apatite; chitosan; ions assembly; mineralization; [全文内容正在添加中] ......
Influence of rare-earth ions on structural and magnetic properties of CdFe2O4 ferritesAshok Gadkari1,Tukaram Shinde2,Pramod Vasambekar31. Department of Physics, GKG College,Kolhapur 416012, India2... powders of rare-earth ions added CdFe2O4 ferrites were synthesized by oxalate co-precipitation method.The influence of R ions(R = Sm3+, Y3+, and La3+) on the microstructure and magnetic properties......
Upconversion emission of SrYbF5 :Er3+ nanosheets modified by Tm3+ ions刘晴1,颜晓红1,2,陈远1,王祥夫21. College of Science, Nanjing University of Aeronautics and Astronautics2. School of Electronic Science...,the upconversion emissions of Tm3+ions centered at 474 nm(1G4→3H6),679 nm(3F2→3H6),699 nm(3F3→3H6),803 nm(3H4→3H6)and emissions of Er3+ions centered at 522 nm(2H11/2→4I15/2),543 nm(4S3/2→4I15/2),654......
Upconversion emission of SrYbF5 :Er3+ nanosheets modified by Tm3+ ions刘晴1,颜晓红1,2,陈远1,王祥夫21. College of Science, Nanjing University of Aeronautics and Astronautics2. School of Electronic Science...,the upconversion emissions of Tm3+ions centered at 474 nm(1G4→3H6),679 nm(3F2→3H6),699 nm(3F3→3H6),803 nm(3H4→3H6)and emissions of Er3+ions centered at 522 nm(2H11/2→4I15/2),543 nm(4S3/2→4I15/2),654......
Effect of cerium ions initial distribution on the crystalline structure and catalytic performance of CeY zeolite张乐1,2,秦玉才2,汲德强2,储刚2,高雄厚3,张晓彤2,宋丽娟1,21. College of Chemical Engineering,China University...:Ce Y samples with different cerium(Ce) ions initial distribution were prepared by diverse preparation processes. The correlative influence of Ce ions......
Effect of cerium ions initial distribution on the crystalline structure and catalytic performance of CeY zeolite张乐1,2,秦玉才2,汲德强2,储刚2,高雄厚3,张晓彤2,宋丽娟1,21. College of Chemical Engineering,China University...:Ce Y samples with different cerium(Ce) ions initial distribution were prepared by diverse preparation processes. The correlative influence of Ce ions......
Reduction of Tb4+ ions in luminescent Y2O3:Tb nanorods prepared by microwave hydrothermal methodJaros?aw Kaszewski1,Bart?omiej S.Witkowski1,?ukasz Wachnicki1,Hanka Przybylińska1,Boles?aw... in the green region was observed. Significant luminescence intensity increase was obtained after thermal treatment. Reduction of terbium ions was observed after heating in the air atmosphere. Tb4+ ions were......
Sulfate Ions Immobilization of Calcined Layered Double Hydroxides in Hardened Cement Paste and Concrete马军涛1,2,3,WANG Daguang2,段平4,3,SHI Yanke1,21. MWR Center for Levee Safety and Disease Prevention... Science and Chemistry, China University of Geosciences摘 要:The sulfate ions immobilization behavior of calcined layered double hydroxides(CLDHs) in the hardened......
Reduction of Tb4+ ions in luminescent Y2O3:Tb nanorods prepared by microwave hydrothermal methodJaros?aw Kaszewski1,Bart?omiej S.Witkowski1,?ukasz Wachnicki1,Hanka Przybylińska1,Boles?aw... in the green region was observed. Significant luminescence intensity increase was obtained after thermal treatment. Reduction of terbium ions was observed after heating in the air atmosphere. Tb4+ ions were......
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