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Two times hydrolyzation of Fe~(3+) and Cr~(3+) was firstly pointed out in the process of pillar preparation with hydrothermal method. In order to improve the thermal stability, Fe/Cr-Si-pillaring agent solution was synthesized by hydrolyzing Fe~(3+) and Cr~(3+) solution on the surface of silica sol, and Fe/Cr-Si-pillared montmorillonite (Fe/Cr-Si-PILM) was prepared with conventional method and hydrothermal method. Because the technical innovation of preparation is the best way to improve the PILM properties, two novel methods (Microwave method and Ultrasonication method) have been studied to synthesize Fe/Cr-PILM.In order to expand PILMs new application in the field of coal conversion, catalytic activity of Fe/Cr-Si-PILM catalyst in LongKou lignite and ShenHua coal residue liquefaction was discussed and characterized in the last part of this paper.
研究证明:蒙脱石的预处理是可行的,我们以预处理后的Ca-M为原料,研究并优化了PILM的水热法制备工艺,提出了金属离子的二次水解法;为了提高PILM的热稳定性,我们自制了硅溶胶,合成了Fe/Cr-Si三元复合柱化剂,并制备了Fe/Cr-Si-PILM;在PILM合成中,制备技术的革新是改进PILM性能的重要方法,为此我们探索了微波合成法和超声波合成法在制备Fe/Cr-PILM中的应用;最后,我们选择龙口褐煤和神华煤液化残渣为研究对象,探索了Fe/Cr-Si-PILM催化剂在煤炭液化中的应用,希望能开拓PILM应用的新领域。
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First of all, this study will be multi-walled carbon nanotubes by chemical oxidation process purified so it can be modified to deal with than the purification of purity before the modified 5 wt%, more than 1.89 times the surface area to increase the surface potential decrease of about 10 ~ 20 mV and the surface functional base (-COOH and-OH) to increase 1.45 times, and then the control technology of electroless preparation parameters include: analysis of plating time, plating analysis of temperature, metal ions in solution than the (Fe2+/ Ni2+), bath pH and the added value of dispersion Agent and other research towards Fe-Ni particles to increase the iron content and Fe-Ni particles spread in the MWCNT upper fixed targets,the results found that when the parameters for the preparation of 50 ℃, pH10, do not add dispersant, metal ions than the solution (Fe2 +/ Ni2 +) 7, the highest iron content can be Fe = 40.55 at%(flat iron content 111.17 mg / g) of nanocomposites Fe-Ni/CNT, then for a series of the nature of its analysis, the final evaluation Fe-Ni/CNT nanocomposites were processed on the effectiveness of the application of mixed pollutants, the results showed that in 120 minutes at the same time when Adsorption of heavy metal ions lead nitrate 10 ppm, selenium heavy metal ion degradation of 1 ppm and orange azo dye AO7 50 ppm standard of effluents, and after a total Fe-Ni nano-particles to SEM / EDS analysis of more than 50% still remaining.
本研究首先将多壁奈米碳管以化学氧化法做纯化改质处理能使其纯度较纯化改质前提高5 wt%、比表面积提高1.89倍、表面电位下降约10~20 mV以及表面官能基提高1.45倍,再控制无电镀技术之制备参数包括:析镀时间、析镀温度,镀液中金属离子比(Fe2+/Ni2+)、镀液pH值及是否添加分散剂等,研究朝提高Fe-Ni粒子的含铁量与Fe-Ni粒子散布固定在MWCNT上等目标进行,研究结果发现当制备参数为50 ℃、pH10、不添加分散剂、镀液金属离子比(Fe2+/Ni2+)7时,可得到最高铁含量Fe = 40.55 at%(单位铁含量111.17 mg/g)之奈米复合材料Fe-Ni/CNT,接著对其作一系列性质分析,最后评估奈米复合材料Fe-Ni/CNT对共处理混合污染物之应用效益,结果显示其在120分钟时能够同时吸附重金属硝酸铅离子10 ppm、重金属硒酸根离子1 ppm及降解偶氮橘色染料AO7 50 ppm达放流水标准,且共处理后奈米Fe-Ni粒子以SEM/EDS分析仍剩余50 %以上。
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The results show that with the increase of deformation strains and thinning of Fe-Cr fibers, the saturation magnetization are about 140 A·m2/kg constantly, and the remanent magnetism and coercivity increase gradually.The magnetic properties of Fe-Cr fibers are invariant when the Fe-Cr fibers were preserved in absolute alcohol or air for more than 1 a. After Fe-Cr fibers heated in air at temperature higher than 300 ℃ for 1 h, the Fe-Cr fibers transform from ferromagnetic α-solution to paramagnetic2O3, and the saturation magnetization of samples decreases remarkably. With the increase of deformation strains, the thermal stability of thinner Fe-Cr fibers decreases.
结果表明:随着变形量的增大和Fe-Cr纤维的细化,纤维的饱和磁矩基本恒定(约140 A·m2/kg),而剩磁和矫顽力则逐渐增加; Fe-Cr纤维在无水乙醇和空气中储存一年以上,磁性基本保持不变; Fe-Cr纤维在空气中经300 ℃以上加热1 h后,逐渐由铁磁性的α-固溶体转变为顺磁性的2O3,饱和磁化强度显著下降;且随着变形量的增大,较细Fe-Cr纤维的热稳定性较差。
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Fe-Ni alkaline cell:铁镍碱性蓄电池
Fe-Co-V soft magnetic alloy 铁钴钒软磁合金 | Fe-Ni alkaline cell 铁镍碱性蓄电池 | Fe-Ni constant expansion alloy 铁镍定膨胀合金
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FE Drizzle:(毛毛雨)
15.2.3 FE Cylinder(圆柱体) | 15.2.4 FE Drizzle(毛毛雨) | 15.2.5 FE Force Motion Blur(强大的运动模糊)
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FE Drizzle:(涟渏)
FE Bend It (扇形) | FE Drizzle (涟渏)★ | FE Light Rays (光效遮罩)★