MoS₂-Decorated/Integrated Carbon Fiber: Phase Engineering Well-Regulated Microwave Absorber

Area of Science:

• Materials Science
• Nanotechnology
• Condensed Matter Physics

Background:

• Molybdenum disulfide (MoS2) is a promising material for electromagnetic wave (EMW) absorption.
• Phase engineering is crucial for tuning MoS2's electronic properties.
• The impact of different MoS2 phases (1T vs. 2H) on EMW absorption remains underexplored.

Purpose of the Study:

• To investigate the effect of phase engineering on MoS2 for EMW absorption.
• To compare the EMW absorbing performance of 1T/2H MoS2 and 2H MoS2.
• To develop novel flexible EMW absorbers based on phase-engineered MoS2.

Main Methods:

• A facile one-step hydrothermal route was employed to synthesize micro-1T/2H MoS2.
• The 1T phase in MoS2 was induced by intercalating guest molecules and ions.
• Comparative studies were conducted between 1T/2H MoS2 and 2H MoS2 for EMW absorption analysis.
• Flexible EMW absorbers were fabricated by growing ultrathin 1T/2H MoS2 on carbon fiber.

Main Results:

• The synthesis yielded micro-1T/2H MoS2 with controllable phase composition.
• 1T/2H MoS2 demonstrated significantly enhanced microwave absorption properties compared to 2H MoS2 at 15% loading.
• Flexible absorbers utilizing 1T/2H MoS2 on carbon fiber exhibited outstanding performance at a low 5% loading.

Conclusions:

• Phase engineering is an effective strategy to enhance the EMW absorption capabilities of MoS2.
• The 1T/2H phase of MoS2 offers superior EMW absorption over the 2H phase.
• This research paves the way for designing advanced, flexible EMW absorbers for portable electronic devices.