Hollow Metal-Organic Framework/MXene/Nanocellulose Composite Films for Giga/Terahertz Electromagnetic Shielding and Photothermal Conversion  

作　　者：Tian Mai Lei Chen Pei‑Lin Wang Qi Liu Ming‑Guo Ma 

机构地区：[1]Research Center of Biomass Clean Utilization,MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy,Beijing Key Laboratory of Lignocellulosic Chemistry,College of Materials Science and Technology,Beijing Forestry University,Beijing 100083,People’s Republic of China [2]State Silica-Based Materials Laboratory of Anhui Province,Bengbu 233000,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第9期161-179,共19页纳微快报（英文版）

基　　金：the Beijing Nova Program(20230484431);Opening Project of State Silica-Based Materials Laboratory of Anhui Province(2022KF12)is gratefully acknowledged.

摘　　要：With the continuous advancement of communication technology,the escalating demand for electromagnetic shielding interference(EMI)materials with multifunctional and wideband EMI performance has become urgent.Controlling the electrical and magnetic components and designing the EMI material structure have attracted extensive interest,but remain a huge challenge.Herein,we reported the alternating electromagnetic structure composite films composed of hollow metal-organic frameworks/layered MXene/nanocellulose(HMN)by alternating vacuum-assisted filtration process.The HMN composite films exhibit excellent EMI shielding effectiveness performance in the GHz frequency(66.8 dB at Kaband)and THz frequency(114.6 dB at 0.1-4.0 THz).Besides,the HMN composite films also exhibit a high reflection loss of 39.7 dB at 0.7 THz with an effective absorption bandwidth up to 2.1 THz.Moreover,HMN composite films show remarkable photothermal conversion performance,which can reach 104.6℃under 2.0 Sun and 235.4℃under 0.8 W cm^(−2),respectively.The unique micro-and macrostructural design structures will absorb more incident electromagnetic waves via interfacial polarization/multiple scattering and produce more heat energy via the local surface plasmon resonance effect.These features make the HMN composite film a promising candidate for advanced EMI devices for future 6G communication and the protection of electronic equipment in cold environments.

关 键 词：Metal-organic frameworks MXene NANOCELLULOSE Electromagnetic shielding Photothermal conversion 

分 类 号：TB383.2[一般工业技术—材料科学与工程]