Synthesis of mesoporous needle-shaped ytterbium oxide crystals by solvothermal treatment of ytterbium chloride
Synthesis of mesoporous needle-shaped ytterbium oxide crystals by solvothermal treatment of ytterbium chloride
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DOI：
10.1111/j.1551-2916.2007.01611.x
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发表时间：
2007-04-01
影响因子：
3.9
通讯作者：
Inoue, Masashi
中科院分区：
文献类型：
--
作者：
Hosokawa, Saburo;Iwamoto, Shinji;Inoue, Masashi
稀土（RE; Y，Er，Yb）氯化物水合物在1，4-丁二醇中于300 ℃反应2 h得到RE（OH）（2）Cl和RE 2 O 3·xH（2）O的混合物，产物由不规则形状的颗粒组成。延长反应时间（10 h），Er和Y得到RE（OH）（2）Cl和RE_2 O_3·xH（2）O的混合物，Yb得到纯相RE_2 O_3·xH（2）O。Yb的产物包括宽度为0.2-0.6 μ m、长度为5-15 μ m的Yb 2 O 3·xH（2）O的针状单晶。Yb 2 O3·xH（2）O相在350 -500 ℃分解为Yb 2 O3，保持针状形态;即使在1100 ℃煅烧后也保持这种形态。通过在500 ℃下煅烧Yb 2 O 3·xH（2）O获得的Yb 2 O 3单晶具有非常小的空隙，并且通过在800 ℃下煅烧，空隙的直径扩大到35埃。
The reaction of rare-earth (RE; Y, Er, and Yb) chloride hydrates in 1,4-butanediol at 300 degrees C for 2 h gave mixtures of RE(OH)(2)Cl and RE2O3.xH(2)O, and the products were composed of irregularly shaped particles. A prolonged reaction (10 h) yielded a mixture of RE(OH)(2)Cl and RE2O3.xH(2)O for Er or Y, but phase-pure RE2O3.xH(2)O was obtained for Yb. The product for Yb comprised needle-shaped single crystals of Yb2O3.xH(2)O with a width of 0.2-0.6 mu m and a length of 5-15 mu m. The Yb2O3.xH(2)O phase decomposed to Yb2O3 at 350 degrees-500 degrees C, preserving the needle-shaped morphology; this was maintained even after calcination at 1100 degrees C. Single crystals of Yb2O3 obtained by the calcination of Yb2O3.xH(2)O at 500 degrees C had very small voids and the voids were enlarged to 35 angstrom in diameter by calcination at 800 degrees C.