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通过KOH活化纸巾制备活性炭纤维, 比表面积高达1388 m2/g. 用制得的活性炭纤维作为吸附剂进行亚甲基蓝吸附实验研究,用Langmuir和Freundlich吸附模型分析实验数据,并研究pH值对活性炭纤维吸附亚甲基蓝影响. 活性炭纤维吸附速率更适于Pseudo-second-order动力学模型,相关系数高达0.998. 整个浓度变化区间Langmuir吸附等温线比Freundlich吸附等温线更适合实验数据. 所制备活性炭纤维对亚甲基蓝最大平衡吸附量为520 mg/g,实验发现,pH值越高活性炭纤维对亚甲基蓝吸附量越大.  相似文献
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以桑蚕丝为模板制备多级生物形态结构ZrO2-CeO2. 整个合成过程是由桑蚕丝模板的导向作用决定的. 分析结果表明ZrO2-CeO2结晶良好,呈多级网络中空纤维结构,直径为16~28μm,800 oC煅烧后ZrO2-CeO2晶粒尺寸约为14 nm.  相似文献
3.
The binary system CeO2–ZrO2 is thermally stable and has superior reduction–oxidation properties. It has been commonly used in the three-way catalytic converters for automobiles. In this work, an inorganic biomorphic porous CexZr1−xO2 fibrous network was successfully synthesized by using the egg shell membrane (ESM) as templates, and its morphology was a perfect replica of the original ESM. The synthesis involved a simple infiltration and calcination process. A fresh ESM was peeled from a chicken egg shell. It was soaked in a Ce(NO3)3 and Zr(NO3)4 mixture before it was calcined at 700 °C in ambient environment. The fibers in the biomorphic network had diameter ranged from 1 to 4 μm, and they were composed of CexZr1−xO2 nanocrystallites having an average grain size of 10 nm.  相似文献
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