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单分散PMMA乳胶微球依据文献[11]合成，经过离心组装成胶体晶体模板。以柠檬酸为螯合剂，LiNO3、Al(NO3)3∙9H2O和Mn(Ac)2∙4H2O按摩尔比1:1:1溶解于乙醇和水的溶剂中制成前驱液，然后填充到模板间隙。经70 °C干燥2 h后，该复合物在马弗炉中空气气氛下焙烧，先以2 °C/min的速率升温至300 °C、恒温2 h，再以相同的升温速度加热到600 °C恒温不同时间，得到尖晶石的三维有序大孔LiAlMnO4。让样品在0.1 M盐酸中浸泡1 h，然后过滤、用去离子水冲洗、干燥，制备出目标产物锂离子筛。材料的微观形貌和大孔尺寸使用场发射扫描电子显微镜(SEM, JOEL JSM-6360LV)在25 kV下观察，观察前样品表面经过~100 s的喷金处理。使用粉末X-射线衍射仪(XRD, Rigaku D/max-2550)采用Cu Kα靶辐射源(λ=1.5406 Å 测定样品晶相和晶粒尺寸。BET比表面积用Quantachrome表面积分析仪(NOVA 2200e)测定，吸附前样品在100 °C过夜脱气处理。 |
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benmao_mogu
木虫 (著名写手)
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ZHL0627(金币+10, 翻译EPI+1): 2010-05-07 20:02:41
| Single scattered PMMA latex microspheres based on literature [11]synthesis, centrifugal assemble colloidal crystal templates. With citric acid, LiNO3, chelating agent for Al (NO3) 3; Lloyd 9H2O and Mn (Ac) 2; Lloyd 4H2O mole ratio by 1 dissolved in water and ethanol solvent liquid, and then fill made precursor to the template clearance. After 70 ° C h, after the dry 2 compounds in the air in the muffle furnace atmosphere, with 2 roasting ° C/min rate of warming to 300 ° C, thermostatic 2 h, to the same temperature of heating to 600 ° C in different time constant, spinel 3d -ordered macroporous LiAlMnO4. Let samples in 0.1 M hydrochloric acid, then soak 1 h, deionized water filtration, dry wash out the target product, the preparation of lithium ionic sieve. The microstructure and materials used size hole field emission scanning electron microscopy (SEM) JSM JOEL, 6360LV - 25 kV, observe samples by ~ 100 s surface spray gold. Using X-ray powder diffraction (XRD, Rigaku D/Max - 2550) by Cu K alpha target emitters (lambda = 1.5406 & Aring sample and grain size wafer surface. Quantachrome with surface than BET 2200e entire NOVA analyzer (samples), adsorption in 100 ° C overnight degas. |
3楼2010-04-17 20:45:26
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Monodisperse PMMA latex microspheres were synthesized according to the literature [11] and assembled into a colloidal crystal template after centrifugation. Using citric acid as chelator, a precursor solution was prepared by dissolving LiNO3、Al(NO3)3∙9H2O and Mn(Ac)2∙4H2O in the solvent mixture of ethanol and water with a molar ratio of 1:1:1 and then filled into the die clearance. After drying at 70 °C for 2 hours, the complex was baked in the atmosphere of air in the muffle furnace. First the temperature was increased to 300 °C with a rate of 2 °C/min and kept constant for 2 hours, then it was heated to 600 °C with the same rate and kept for different lengths of time, and as a result the spinel three-dimensional ordered macroporous LiAlMnO4 was obtained. The sample was immersed in 0.1 M hydrochloric acid for 1 hour, filtrated, rinsed with deionized water and dried, in this way the target product lithium ion-sieve was prepared. The microcosmic morphology and the macropore size of the material were observed with field emission scanning electron microscopy (SEM, JOEL JSM-6360LV) under 25kV, and the sample surface underwent ~100 s gold coating before the observation. The crystalline phase and grain size of the sample were determined with X-ray powder diffractometer (XRD, Rigaku D/max-2550) using a Cu Kα target radiation source (λ=1.5406 Å . The BET specific surface area was determined with a Quantachrome surface area analyzer (NOVA 2200e) and the sample was degassed overnight at 100 °C before adsorption. 因为不是自己的本行，也不知道是不是翻译得都地道，楼主最好再仔细check下。 |
2楼2010-04-15 00:46:23
