期刊
NANOSCALE
卷 10, 期 31, 页码 15035-15047出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr04262d
关键词
-
类别
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and future Planning [2017R1A2B2008774]
- National Research Foundation of Korea [2017R1A2B2008774] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A series of metal-organic framework-74s (MOF-74s), composed of two different metallic species (Zn/Ni or Zn/Mn in various compositions), were synthesized, and Ni or MnO-doped carbonaceous materials were first prepared by pyrolysis of the MOFs under an inert environment for catalytic applications. These MOF-derived nanomaterials (MDNMs), obtained by pyrolysis of MOF-74s, were characterized thoroughly to understand their phase, porosity, particle size, dispersion, and composition. With increasing Zn content in the bimetallic MOF-74s, the porosity of the MDNMs increased but the size and content of Ni or MnO in the MDNMs decreased monotonously. One MDNM(75Zn25Mn), prepared from MOF-74(75%Zn/25%Mn), showed noticeably higher activity in the oxidation of benzyl alcohol as compared with not only the MDNM(xZnyMn)s but also MnOx-loaded carbon or loaded gamma-alumina (or, MDNM(75Zn25Mn) showed similar to 54 times turnover frequency (TOF) to that of MnO/activated carbon). MDNM(75Zn25Mn) was also effective in the oxidative removal of dibenzothiophene from a model fuel. Moreover, MDNM(75Zn25Ni), prepared from MOF-74(75%Zn/25%Ni), had the highest TOF in the reduction of 4-nitrophenol among various MDNM(xZnyNi)s. The highest activity of MDNM(75Zn25Mn) and MDNM(75Zn25Ni), even with the lowest Mn and Ni contents in the respective MDNMs, for oxidation and reduction in several cycles might be due to the well-dispersed MnO (and Ni) and high porosity with mesopores. Therefore, it can be suggested that pyrolysis of mixed-metal MOFs such as MOF-74s can be a facile way to obtain highly effective and recyclable heterogeneous catalysts, with well-dispersed active species in very small sizes, for various organic reactions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据