Preparation of mono-dispersed carbonaceous spheres via a hydrothermal process
Preparation of mono-dispersed carbonaceous spheres via a hydrothermal process
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水热法制备单分散碳质球
DOI：
10.1016/j.apt.2017.07.017
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发表时间：
2017-10-01
影响因子：
5.2
通讯作者：
Zhang, Shaowei
中科院分区：
文献类型：
--
作者：
Li, Saisai;Liang, Feng;Zhang, Shaowei
以葡萄糖为原料，采用水热法合成了单分散、粒径分布窄的碳球。考察了水热温度、时间、葡萄糖浓度、溶液pH值等因素对反应的影响。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、感应耦合等离子体发射光谱（ICP）、热重/差示扫描量热（TG/DSC）、氮气吸附/脱附和傅里叶变换红外光谱（FTIR）等手段对产物的结构和表面性能进行了表征。结果表明，在160 ~ 180 ℃范围内，随着水热温度的升高，壳聚糖的产率从2.1%提高到32%，随着水热时间的延长，壳聚糖的平均粒径从0.23 μ m增加到0.95 μ m。起始溶液的pH值通过影响葡萄糖的分解产物对CS的形貌有明显的影响。当起始溶液的pH值小于12时，可以得到CS，但当pH值进一步升高到13-14时，形成的不是球形的CS，而是荧光团状的碳聚集体。在pH 6和9条件下制备的壳聚糖对亚甲基蓝（MB）具有较好的吸附性能，这与壳聚糖具有较高的比表面积有关。(C)2017年日本粉末技术学会。由Elsevier B. V.和日本粉末技术协会出版。All rights reserved.
Mono-dispersed carbonaceous spheres (CS) with a narrow size distribution were synthesized via hydrothermal treatment of glucose. The effects of hydrothermal temperature and time, glucose concentration and pH value of solution were investigated in detail. Structures and surface properties of as prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Induced coupled plasma emission spectroscopy (ICP), thermogravimetric analysis/differential scanning calorimetry (TG/DSC), Nitrogen adsorption/desorption and Fourier transformed infrared spectroscopy (FTIR). The results showed that the production yield of CS increased from 2.1 to 32% with increasing the temperature from 160 to 180 degrees C, and the average size increased from 0.23 to 0.95 m with extending the hydrothermal time from 8 to 16 h. pH value of the starting solution showed an evident effect on the morphology of CS via affecting the decomposition products of glucose. CS could be obtained when the pH value of starting solution was less than 12, but further increasing the pH value to 13-14 led to the formation of lumpy aggregations of carbon rather than spherical CS. The CS prepared under pH 6 and 9 showed good adsorption capacity for Methylene blue (MB), which was attributed to their relatively high specific surface area. (C) 2017 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.