Heterodoped nanoflakes: synthesis and characterization of sulfur‐doped NbSe2 nanoflakes
Heterodoped nanoflakes: synthesis and characterization of sulfur‐doped NbSe2 nanoflakes
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DOI：
10.1002/crat.201300354
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发表时间：
2014-03
影响因子：
1.5
通讯作者：
Shuaishuai Chen;Hongping Li;H. Tang;Y. Zhang;Jin Yang;X. Ji;Lin Chen;Kun Zhang;Changsheng Li
中科院分区：
文献类型：
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作者：
Shuaishuai Chen;Hongping Li;H. Tang;Y. Zhang;Jin Yang;X. Ji;Lin Chen;Kun Zhang;Changsheng Li
用杂原子掺杂NbSe 2是调整其性质的有效方法。在这里，固相合成工艺已被用于在生长过程中通过硫掺杂来生长均匀且优异的结晶纳米NbSe 2。研究了纳米NbS 2xSe 2（1-x）（x = 0.03 <$0.2）的硫掺杂机理：硫原子不仅取代了Se位，而且通过一步反应进入层隙。在NbSe 2结构中，随着硫含量的增加，硫原子取代Se原子的位置，然后位于NbSe 2层间货车范德华能隙的空八面体位置。讨论了制备的NbSe 2和掺硫NbSe 2粉末作为HVI 1500基础油添加剂的润滑性能。NbSe 2和硫掺杂的NbSe 2都改善了基础油的润滑性能。此外，硫掺杂（0.1at%）NbSe 2在HVI 1500基础油中的润滑性能优于纯NbSe 2，这可能归因于它们的薄层结构和硫掺杂剂。
Doping of NbSe2 with heteroatoms is an effective way to tailor its properties. Here, solid phase synthesis process has been utilized for growing uniform and excellent crystalline nano‐NbSe2 by sulfur dopant during the growing process. The sulfur‐doped mechanism of nano‐NbS2xSe2(1‐x)(x = 0.03∼0.2) has been investigated: the sulfur atoms not only replace the Se position but also intercalate in layer gap by one‐step reaction. In the structure of NbSe2, the sulfur atoms replace the positions of Se atoms and then are located in the empty octahedral positions of van der waals gap between the NbSe2 layers with the increase of sulfur content. The lubrication properties of the as‐prepared NbSe2 and sulfur‐doped NbSe2 powders as additives in HVI1500 base oil were discussed. The lubrication properties of base oil was improved by both NbSe2 and sulfur‐doped NbSe2. Furthermore, the lubrication properties of sulfur‐doped (0.1at%) NbSe2 are better than those of pure NbSe2 in HVI1500 base oil, which could be attributed to their thin laminated structure and the sulfur dopant.