Ding Ya, Xia Xing-Hua
Key Lab of Analytical Chemistry for Life Science, Department of Chemistry, Nanjing University, P R China.
J Nanosci Nanotechnol. 2006 Apr;6(4):1101-6. doi: 10.1166/jnn.2006.161.
Hollow carbon nanospheres (HCNS) with large surface area were synthesized from hollow chitosan nanospheres by one-step pyrolysis with a relatively low temperature (550 degrees C). The resulted HCNS is fully carbonized and partially graphitized under the experiment conditions. It is an important and facile method to prepare the uniform, shape- and size-controlled carbon nanomaterials by carbonization of the natural polysaccharide compounds and their derivatives. The as-prepared HCNS has a narrow size distribution in hollow carbon nanospheres (about 53 nm). The structure and size of HCNS are reproducible and could be tunable by changing the preparation conditions. The characterizations to estimate the composition, decompose properties, crystalline form, structure and surface property of the HCNS were investigated using FT-IR spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction measurement (XRD), transmission electron microscopy (TEM) analysis, and the N2 adsorption-desorption isothermal process. The present preparation method makes it feasible to synthesize carbon nanospheres in abundance in the lab, and the synthesized HCNS could be a promising support for metal catalysts, an ideal matrix connecting with DNA or other bioactive substances.
通过在相对较低温度（550摄氏度）下一步热解由中空壳聚糖纳米球合成了具有大表面积的中空碳纳米球（HCNS）。在实验条件下，所得的HCNS完全碳化并部分石墨化。通过天然多糖化合物及其衍生物的碳化来制备均匀、形状和尺寸可控的碳纳米材料是一种重要且简便的方法。所制备的HCNS在中空碳纳米球中具有窄的尺寸分布（约53纳米）。HCNS的结构和尺寸具有可重复性，并且可以通过改变制备条件进行调节。使用傅里叶变换红外光谱（FT-IR）、热重分析（TGA）、X射线衍射测量（XRD）、透射电子显微镜（TEM）分析以及N2吸附-脱附等温过程对HCNS的组成、分解性质、晶型、结构和表面性质进行了表征。本制备方法使得在实验室中大量合成碳纳米球成为可能，并且所合成的HCNS可能是金属催化剂的有前途的载体，是与DNA或其他生物活性物质连接的理想基质。
