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钙钛矿型SrSnO3纳米棒的合成 总被引:2,自引:0,他引:2
采用表面活性剂CTAB(十六烷基三甲基溴化铵)辅助水热法制备了SrSn(OH)6前躯体,将SrSn(OH)6前躯体600 ℃热处理3 h合成了钙钛矿立方SrSnO3一维纳米棒.通过热重-差热分析(TG-DTA)、X射线衍射图谱(XRD)、红外光谱(IR)、透射电子显微镜(TEM)对所合成样品进行了表征.结果表明,水热体系的pH值以及水热温度是影响所得产物纯度和结晶度的重要因素.在合成过程中,表面活性剂CTAB对样品纳米棒结构的生长具有关键作用. 相似文献
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Single-crystal mullite nanobelts were prepared by a simple sol-gel method using WO3 as additive, and nanobelts were straight and uniform with width of 200 nm and length of 3~4 μm. The as-prepared products were characterized with XRD, SEM and TEM and the nanobelt formation mechanism was also discussed. The interphase of aluminium tungstate acted as seed crystals or epitaxial templates during the formation of nanobelts. The further experiments showed that there was a strong correlation between the formation of nanobelts and the presence of WO3. 相似文献
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以没食子酸为原料经酯化、醚化、区域选择性硝化、还原、 Sandmeyer及分子间Ulmann耦合等反应以较高产率合成了6,6'-二甲氧基-4,5,4',5'-二亚甲基二氧基-2,2'-联苯二甲酸二甲酯(β-联苯双酯, β-DDB), 并对其进行衍生化, 得到5个β-DDB的衍生物, 用IR, 1H NMR和MS等鉴定了其结构, 使用手性柱对β-DDB进行拆分得到了两个对映异构体, 利用圆二色谱确定了它们的立体构型. 相似文献