Asymmetric Flasklike Hollow Carbonaceous Nanoparticles Fabricated by the Synergistic Interaction between Soft Template and Biomass
Asymmetric Flasklike Hollow Carbonaceous Nanoparticles Fabricated by the Synergistic Interaction between Soft Template and Biomass
复制标题
软模板与生物质协同作用制备不对称烧瓶状中空碳质纳米粒子
DOI：
10.1021/jacs.6b10841
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发表时间：
2017-02-22
影响因子：
15
通讯作者：
Wang, Yong
中科院分区：
文献类型：
--
作者：
Chen, Chunhong;Wang, Haiyan;Wang, Yong
软模板法广泛应用于空心结构纳米材料的制备。然而，由于这些软模板的不稳定性和典型的球形，所得颗粒具有球形形态，尺寸分布广泛。在此，我们开发了一种可持续的途径，利用软模板法制造具有高度均匀形态和窄尺寸分布的不对称瓶状空心碳质结构。提出了模板与生物量协同作用诱导的动态生长机制。前驱体（核糖）在水热过程中为油酸钠提供了酸性环境，油酸纳米乳在水热过程中形成，并作为前驱体的两亲性衍生物的模板和良性溶剂。同时，共表面活性剂P123有助于纳米乳液的均匀分散，并被认为是导致碳质壳破裂，提供中间产物可以进入的开口。这些微妙的相互作用促进了瓶状、不对称、中空的碳质纳米颗粒的形成。此外，这种独特的结构有助于烧瓶状碳颗粒的高表面积(2335 m(2) g(-1))，从而提高超级电容器的性能。这些发现可能为探索各向异性碳质纳米材料和了解相关机制开辟一个令人兴奋的领域，为日益复杂的碳质材料的设计提供指导。
The soft template method is broadly applied to the fabrication of hollow-structured nanomaterials. However, due to the instability and the typical spherical shape of these soft templates, the resultant particles have a spherical morphology with a wide size distribution. Herein, we developed a sustainable route to fabricate asymmetric flasklike hollow carbonaceous structures with a highly uniform morphology and a narrow size distribution using the soft template method. A dynamic growth mechanism induced by the synergetic interactions between template and biomass is proposed. The precursors (ribose) provide an acidic environment for sodium oleate during the hydrothermal process in which oleic acid nanoemulsions are initially formed and serve as both template and benign solvent for the amphiphilic derivatives of the precursor. Simultaneously, the cosurfactant P123 facilitates the uniform dispersion of the nanoemulsion and is believed to cause the carbonaceous shells to rupture, providing openings through which the intermediates can enter. These subtle interactions facilitate the formation of the flasklike, asymmetric, hollow, carbonaceous nanoparticles. Furthermore, this unique structure contributes to the high surface area (2335 m(2) g(-1)) of the flasklike carbon particles, which enhances the performance of supercapacitors. These findings may open up an exciting field for exploring anisotropic carbonaceous nanomaterials and for understanding the related mechanisms to provide guidance for the design of increasingly complex carbonaceous materials.