Synthesis, Cu incorporation, and deposition of the apatite-type silicates, (La,Ca)10(SiO4)6-x(PO4)xCuyOz
Synthesis, Cu incorporation, and deposition of the apatite-type silicates, (La,Ca)10(SiO4)6-x(PO4)xCuyOz
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磷灰石型硅酸盐 (La,Ca)10(SiO4)6-x(PO4)xCuyOz 的合成、Cu 掺入和沉积
DOI：
10.1007/s10853-016-9960-1
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发表时间：
2016
影响因子：
4.5
通讯作者：
Masataka Ogasawara
中科院分区：
文献类型：
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作者：
Sumio Kato;Tomoyuki Endo;Masataka Ogasawara
采用浸渍法制备了含铜磷灰石型磷灰石-硅酸盐固溶体LaCa(PO)(SiO)CuO(x=3，5，6)。随着铜含量的增加，磷灰石的晶胞体积增大，当x=3和6时，y=0-0.6，表明铜成功地进入了磷灰石晶格的孔道。对LaCa(PO)(SiO)CuO(x=5)样品的Rietveld分析结果表明，在铜掺杂过程中，La和Ca离子在4f位和6h位的分布均保持不变。X射线光电子能谱和热重分析表明，铜物种在加热到1100℃时发生氧化，在空气中冷却时发生还原。此外，LaCa(PO)(SiO)CuO(x=3)样品在500-1100℃范围内的高温X射线衍射分析表明，铜发生了可逆的掺入/沉积，并伴随着铜的氧化/还原。
Cu-containing, apatite-type phosphate-silicate solid solutions, LaCa (PO)(SiO) CuO (x= 3, 5, and 6), were synthesized by an impregnating method into the channels of apatite-type lattice by heat treatment after Cu loading. The unit cell volume of the apatite increased with increasing amount of Cu, y= 0-0.6 for x= 3 and 6, indicating successful incorporation of Cu into the channels of the apatite lattice. The result of Rietveld analysis of a LaCa (PO)(SiO) CuO (x= 5) sample indicated that the distribution of La and Ca cations in both 4f and 6 h sites were maintained during Cu incorporation. X-ray photoelectron spectroscopy and thermogravimetric analyses revealed that oxidation and reduction of Cu species occurred during heating up to 1100 C and cooling in air, respectively. In addition, high-temperature X-ray diffraction analysis of the LaCa (PO)(SiO) CuO (x= 3) sample in the temperature range from 500 to 1100 C revealed that reversible incorporation/deposition of Cu occurred, accompanied by Cu oxidation/reduction.