期刊
LANGMUIR
卷 34, 期 51, 页码 15854-15863出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.8b03238
关键词
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资金
- National Nature Science Foundation of China [51673040]
- Natural Science Foundation of Jiangsu Province [BK20171357, BK20180366]
- Prospective Joint Research Project of Jiangsu [BY2016076-01]
- Opening Project of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control [GD201802-5]
- Fundamental Research Funds for Central Universities [2242018k30008, 3207048418]
- Scientific Innovation Research Foundation of College Graduate in Jiangsu [KYLX16_0266]
- Priority Academic Program Development of Jiangsu Higher Education Institutions [1107047002]
- Fund Project for Transformation of Scientific and Technological Achievements of Jiangsu [BA2016105]
Lightweight and compatible metal-organic framework (MOF)-derived carbon-based composites are widely used in electromagnetic (EM) absorption. Their combination with laminated TiO2-C (derived from Ti3C2Tx) is expected to further strengthen the EM attenuation ability. Herein, novel laminated Co/TiO2-C hybrids were derived from Ti3C2Tx/Co-MOF using heat treatment. Compared with pristine MOF-derived carbon-based composites, the EM absorption ability of Co/TiO2-C was improved by multiple reflections between multilayered microstructures and the improved polarization loss (due to the heterogeneous interfaces, residual defects, and dipole polarization) and the strengthened conductivity loss caused by the carbon layers. Specifically, for the Co/TiO2-C hybrids at thicknesses of 3.0 and 2.0 mm, the optimal reflection loss (RL) was -41.1 dB at 9.0 GHz and -31.0 dB at 13.9 GHz, with effective bandwidths (RL <= -10 dB) of 3.04 and 4.04 GHz, respectively. This study will underline the preparation of carbon-based absorbing materials starting from MXene/MOF hybrids.
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