Promising Ti₃C₂T_x MXene/Ni Chain Hybrid with Excellent Electromagnetic Wave Absorption and Shielding Capacity

Abstract

Electromagnetic (EM) pollution affecting people's normal lives and health has attracted considerable attention in the current society. In this work, a promising EM wave absorption and shielding material, MXene/Ni hybrid, composed of one-dimensional Ni nanochains and two-dimensional Ti 3 C 2 T x nanosheets (MXene), is successfully designed and developed. As expected, excellent EM wave absorption and shielding properties are obtained and controlled by only adjusting the MXene content in the hybrid. A minimum reflection loss of −49.9 dB is obtained only with a thickness of 1.75 mm at 11.9 GHz when the MXene content is 10 wt %. Upon further increasing the MXene content to 50 wt %, the optimal EM shielding effectiveness (SE) reaches 66.4 dB with an absorption effectiveness (SE A ) of 59.9 dB. Mechanism analysis reveals that the excellent EM wave absorption and shielding performances of the hybrid are contributed to the synergistic effect of conductive MXene and magnetic Ni chains, by which, the dielectric properties and electromagnetic loss can be easily controlled to obtain appropriate impedance matching conditions and good EM wave dissipation ability. This work provides a simple but effective route to develop MXene-based EM wave absorption and shielding materials. A universal guideline for designing the absorbing and shielding materials for the future is also proposed.

Mechanical, Thermal, and Rheological Properties of Ti3C2Tx MXene/ Thermoplastic Polyurethane Nanocomposites

“…Ti 3 C 2 T x MXene was synthesized by etching Al atom layer from the Ti 3 AlC 2 phase according to the previous work. [ 38–40 ] Briefly, 2 g of LiF was put into 40 mL of 9 m HCl in a polytetrafluoroethylene (PTFE) container. After 30 min stirring, 2 g of Ti 3 AlC 2 powder (<38 µm) was slowly added to the container, and kept for 24 h at 35 °C.…”

Hierarchical Carbon Fiber@MXene@MoS2 Core‐sheath Synergistic Microstructure for Tunable and Efficient Microwave Absorption

“…The Ti 2p-related four peaks for CM at 455.8, 459.6, 461.5, and 465.2 eV correspond to CTiT x 2p 3/2 , TiO 2p 3/2 , CTiT x 2p 1/2 , and TiO 2p 1/2 bonds, respectively ( Figure 4d). [7,40] The C 1s-related four peaks located at 282.0, 285.0, 286.4, and 289.2 eV correspond to CTiT x , CC/ CC, CO and OCO bonds, respectively (Figure 4e). [39] Combining the O 1s-related and F 1s-related spectra ( Figure S4a,b, Supporting Information), it can be deduced that there are abundant OH, O, and F groups on the surface of Ti 3 C 2 T x .…”

“…Generally, the design and fabrication of microwave absorption (MA) materials mainly focus on two aspects: the selection of proper elements and the construction of specific structures. According to the existing cognition, 1D MA‐related materials, benefiting from the anisotropy and high aspect ratio, are prone to form carrier transport path in the axial direction under EM fields, which consumes the energy of EM wave through conducting loss; [ 5–7 ] 2D MA‐related materials promote the attenuation of EM wave mainly depending on the polarization enhancement caused by the high specific surface area and the multiple reflections between the layers, [ 8–10 ] while 3D materials improve the impedance matching of materials by introducing pores or gaps to enhance MA properties. [ 11–16 ] In particular, the latest reports have showed that hierarchical 3D structures containing 1D or 2D cells exhibit exciting MA properties.…”

MXene‐Based Nanocomposites for Energy Conversion and Storage Applications

“…A minimum reflection coefficient of G/TiC/Ti 3 C 2 with the thickness of 2.1 mm reaches −63 dB and the effective absorption bandwidth is more than 3.5 GHz. Liu's team successful designed MXene/Ni hybrid applied for electromagnetic wave absorption and shielding as shown in Figure b . A minimum reflection loss of −49.9 dB is achieved with a thickness of 1.75 mm at 11.9 GHz.…”