2D Ti3C2Tx MXenes: Visible Black but Infrared White Materials

Yang Li, Cheng Xiong, He Huang, Xudong Peng, Deqing Mei, Meng Li, Gongze Liu, Maochun Wu, Tianshou Zhao, Baoling Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

Black inorganic materials with low infrared absorption/emission (or IR white) are rare in nature but highly desired in numerous areas, such as solar–thermal energy harvesting, multispectral camouflage, thermal insulation, and anti-counterfeiting. Due to the lack of spectral selectivity in intrinsic materials, such counter-intuitive properties are generally realized by constructing complicated subwavelength metamaterials with costly nanofabrication techniques. Here, the intrinsically low mid-IR emissivity (down to 10%) of the 2D Ti3C2Tx MXene is reported. Associated with a high solar absorptance (up to 90%), it embraces the best spectral selectivity among the reported intrinsic black solar-absorbing materials. Its appealing potential in several of the aforementioned areas is experimentally demonstrated. First-principles calculations reveal that the IR emissivity of MXene relies on both the nanoflake orientations and terminal groups, indicating great tunability. The calculations also suggest more potential low-emissivity MXenes including Ti2CTx, Nb2CTx, and V2CTx. This work opens the avenue to further exploration of a family of intrinsically low-emissivity materials with over 70 members.

Original languageEnglish
Article number2103054
JournalAdvanced Materials
Volume33
Issue number41
DOIs
Publication statusPublished - 14 Oct 2021
Externally publishedYes

Keywords

  • anti-counterfeiting
  • camouflage
  • infrared emissivity
  • MXenes
  • solar–thermal energy conversion
  • Ti C T

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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