High-temperature stability in air of Ti3C2Tx MXene-based composite with extracted bentonite

Na Liu, Qiaoqiao Li, Hujie Wan, Libo Chang, Hao Wang, Jianhua Fang, Tianpeng Ding, Qiye Wen (), Liujiang Zhou () and Xu Xiao ()
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Na Liu: University of Electronic Science and Technology of China
Qiaoqiao Li: University of Electronic Science and Technology of China
Hujie Wan: University of Electronic Science and Technology of China
Libo Chang: University of Electronic Science and Technology of China
Hao Wang: Nanjing University
Jianhua Fang: Army Logistic Academy of PLA
Tianpeng Ding: University of Electronic Science and Technology of China
Qiye Wen: University of Electronic Science and Technology of China
Liujiang Zhou: University of Electronic Science and Technology of China
Xu Xiao: University of Electronic Science and Technology of China

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Although Ti3C2Tx MXene is a promising material for many applications such as catalysis, energy storage, electromagnetic interference shielding due to its metallic conductivity and high processability, it’s poor resistance to oxidation at high temperatures makes its application under harsh environments challenging. Here, we report an air-stable Ti3C2Tx based composite with extracted bentonite (EB) nanosheets. In this case, oxygen molecules are shown to be preferentially adsorbed on EB. The saturated adsorption of oxygen on EB further inhibits more oxygen molecules to be adsorbed on the surface of Ti3C2Tx due to the weakened p-d orbital hybridization between adsorbed O2 and Ti3C2Tx, which is induced by the Ti3C2Tx/EB interface coupling. As a result, the composite is capable of tolerating high annealing temperatures (above 400 °C for several hours) both in air or humid environment, indicating highly improved antioxidation properties in harsh condition. The above finding is shown to be independent on the termination ratio of Ti3C2Tx obtained through different synthesis routes. Utilized as terahertz shielding materials, the composite retains its shielding ability after high-temperature treatment even up to 600 °C, while pristine Ti3C2Tx is completely oxidized with no terahertz shielding ability. Joule heating and thermal cycling performance are also demonstrated.

Date: 2022
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DOI: 10.1038/s41467-022-33280-2

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