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采用O2氧化法在碱性条件下氧化Mn2+,制备Li-birnessite型层状MnO2.X射线衍射、扫描电子显微镜、BET、热重等技术表征MnO2样品的性能.以放充电法测试Li-birnessite正极材料性能.结果表明,Li-birnessite结晶良好,层间距约为0.70 nm,呈球状或类球状.以Li-birnessite为正极材料的扣式电池在0.2 C(40 mA/g)条件下放电时容量高达203 mAh/g,且具有良好的倍率性能. 相似文献
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高内相比乳液模板法合成多孔材料的研究进展 总被引:1,自引:0,他引:1
综述了以高内相比乳液作模板制备多孔材料的研究进展,介绍了油包水(W/O)乳液体系法、水包油(O/W)乳液体系法和超临界CO2法等制备方法、各种多孔材料的泡孔及通道直径、比表面积、密度等性能,以及这类多孔材料在生物医学、有机化学品清除、化学催化、水溶液中固体杂质分离、液相色谱、电化学传感器等领域的应用,并对其发展前景进行了展望。 相似文献
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In present literature search, some cyano-containing compounds, which are very rare in plants, from the traditional anticancer herb Tiankuizi were reported. To find more cyano-containing compounds in the important plant Semiaquilegia adoxoides (DC) Makino (Chinese name Tiankuizi), the isolation of the chemical constituents was investigated for advancing the research. Two new compounds, a new alkaloid, 1,2,3,4-tetrahydro-6-hydroxy-1[(3,4-dihydroxyphenyl)methyl]-7-methoxy-2,2-dimethyl-isoquinolinium, named Semiaquilegine A (1), and a new ester, 3-(4'-hydroxyphenyl)-2-propenoic acid (4"-carboxyl)-phenyl ester (2), and four cyano-containing compounds, (Z)-6a-(β-D-glucosyloxy)-4a,5a-dihydroxy-2-cyclohexene-△^1,a-acetonitrile (3), (L0-6α-(β-D-glucosyloxy)-4α-hydroxy-2-cyclohexene-△^1,α-acetonitrile (4), lithospermoside (5), ehretioside B (6), as well as eleven known compounds, were isolated from the roots of Semiaquilegia adoxoides. The structures of new compounds 1 and 2 were elucidated mainly by 1D/2D-NMR techniques. Very unusual cyano-containing compounds 3 and 4 were first isolated from Ranunculaceae family. Hitherto, there were six cyano-containing compounds found in the herb. 相似文献
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