Yan Jing, Huang Ying, Zhang Xiangyong, Gong Xin, Chen Chen, Nie Guangdi, Liu Xudong, Liu Panbo
MOE Key Laboratory of Material Physics and Chemistry Under Extraodinary Conditions School of Chemistry and Chemical Engineering, Ministry of Education, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China.
School of Materials Science and Engineering, Central South University, Changsha, 410083, People's Republic of China.
Nanomicro Lett. 2021 Apr 27;13(1):114. doi: 10.1007/s40820-021-00646-y.
Phase engineering is an important strategy to modulate the electronic structure of molybdenum disulfide (MoS). MoS-based composites are usually used for the electromagnetic wave (EMW) absorber, but the effect of different phases on the EMW absorbing performance, such as 1T and 2H phase, is still not studied. In this work, micro-1T/2H MoS is achieved via a facile one-step hydrothermal route, in which the 1T phase is induced by the intercalation of guest molecules and ions. The EMW absorption mechanism of single MoS is revealed by presenting a comparative study between 1T/2H MoS and 2H MoS. As a result, 1T/2H MoS with the matrix loading of 15% exhibits excellent microwave absorption property than 2H MoS. Furthermore, taking the advantage of 1T/2H MoS, a flexible EMW absorbers that ultrathin 1T/2H MoS grown on the carbon fiber also performs outstanding performance only with the matrix loading of 5%. This work offers necessary reference to improve microwave absorption performance by phase engineering and design a new type of flexible electromagnetic wave absorption material to apply for the portable microwave absorption electronic devices.
相工程是调节二硫化钼（MoS）电子结构的重要策略。基于MoS的复合材料通常用作电磁波（EMW）吸收剂，但不同相（如1T相和2H相）对EMW吸收性能的影响仍未得到研究。在这项工作中，通过简便的一步水热法制备了微1T/2H MoS，其中1T相是由客体分子和离子的插层诱导产生的。通过对1T/2H MoS和2H MoS进行对比研究，揭示了单一MoS的EMW吸收机制。结果表明，基体负载量为15%的1T/2H MoS比2H MoS表现出优异的微波吸收性能。此外，利用1T/2H MoS的优势，在碳纤维上生长的超薄1T/2H MoS制成的柔性EMW吸收剂，仅在基体负载量为5%时就表现出出色的性能。这项工作为通过相工程提高微波吸收性能以及设计新型柔性电磁波吸收材料以应用于便携式微波吸收电子设备提供了必要的参考。
