Microwave-assisted purification of detonation nanodiamond
Microwave-assisted purification of detonation nanodiamond
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DOI：
10.1016/j.diamond.2014.06.007
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发表时间：
2014-09-01
影响因子：
4.1
通讯作者：
Nesterenko, Pavel N.
中科院分区：
文献类型：
--
作者：
Mitev, Dimitar P.;Townsend, Ashley T.;Nesterenko, Pavel N.
在目前的工作中，微波辅助的爆轰纳米金刚石（DND）的纯化方法被认为是，并通过直接ICP-MS和元素分析显示纯化DND的杂质含量。与爆轰烟尘相比，非碳污染物的显着减少，得到的纯度为99.95%。表面表征，包括扫描电子显微镜，低温氮吸附，酸碱电位滴定，zeta电位测量和悬浮液中的DND的粒度分布显示出独特的表面特性，为每个纯化的DND样品。结果突出了使用酸性试剂的微波纯化方法的适用性，允许生产或修改具有不同和可再现表面性质的纳米金刚石。仔细考虑了用于储存样品的实验室玻璃器皿的污染影响。制备了杂质水平比市售样品低两个数量级以上的精制DND。讨论了纳米金刚石纯化样品中残留杂质的分布和浓度水平，并确定了可能的污染原因。(C)2014爱思唯尔有限公司版权所有。
In the present work microwave-assisted purification approaches for detonation nanodiamond (DND) are considered, and the resultant impurity content of purified DND revealed by direct ICP-MS and elemental analysis. A significant reduction in noncarbon contaminants as compared with detonation soot was achieved with resulting purity of 99.95%. Surface characterisation including scanning electronic microscopy, low temperature adsorption of nitrogen, acid-base potentiometric titration, zeta potential measurements and particle size distribution of the DND in suspensions revealed distinctive surface properties for each purified DND sample. Results highlight the suitability of the microwave purification approach using acid reagents, allowing nanodiamonds with different and reproducible surface properties to be produced or modified. Contamination effects from laboratory glassware used to store samples were carefully considered. Refined DND with impurity levels over two orders of magnitude lower than commercially available samples was prepared. The profile and concentration levels of residual impurities in purified samples of nanodiamond are discussed with identification of possible reasons for contamination. (C) 2014 Elsevier B.V. All rights reserved.