Thermal Conversion of Core-Shell Metal-Organic Frameworks: A New Method for Selectively Functionalized Nanoporous Hybrid Carbon
Thermal Conversion of Core-Shell Metal-Organic Frameworks: A New Method for Selectively Functionalized Nanoporous Hybrid Carbon
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DOI：
10.1021/ja511539a
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发表时间：
2015-02-04
影响因子：
15
通讯作者：
Yamauchi, Yusuke
中科院分区：
文献类型：
--
作者：
Tang, Jing;Salunkhe, Rahul R.;Yamauchi, Yusuke
核-壳结构的ZIF-8@ZIF-67晶体是精心设计的，并通过种子介导的生长方法制备。对ZIF-8@ZIF-67晶体进行热处理后，我们得到了以氮掺杂碳（NC）为核、以高石墨化碳（GC）为壳的选择性功能化纳米多孔杂化碳材料。这是NC和GC在纳米水平上整合在一个颗粒中的第一个例子。电化学数据有力地证明，这种纳米多孔混合碳材料整合了单独的NC和GC的有利性质，表现出由恒电流充电-放电曲线在2A.g（-1）的电流密度下计算的显著的比电容（270 F.g（-1））。我们的研究不仅将不同的碳基材料与无限的金属有机框架连接起来，而且还为人工设计具有目标功能的纳米结构开辟了一条新途径。
Core-shell structured ZIF-8@ZIF-67 crystals are well-designed and prepared through a seed-mediated growth method. After thermal treatment of ZIF-8@ZIF-67 crystals, we obtain selectively functionalized nanoporous hybrid carbon materials consisting of nitrogen-doped carbon (NC) as the cores and highly graphitic carbon (GC) as the shells. This is the first example of the integration of NC and GC in one particle at the nanometer level. Electrochemical data strongly demonstrate that this nanoporous hybrid carbon material integrates the advantageous properties of the individual NC and GC, exhibiting a distinguished specific capacitance (270 F.g(-1)) calculated from the galvanostatic charge-discharge curves at a current density of 2 A.g(-1). Our study not only bridges diverse carbon-based materials with infinite metal-organic frameworks but also opens a new avenue for artificially designed nanoarchitectures with target functionalities.