Construction of 0D/1D/2D MXene nanoribbons-NiCo@NC hierarchical network and their coupling effect on electromagnetic wave absorption

MXene-derived Ti3C2–Co–TiO2nanoparticle arraysviacation exchange for highly efficient and stable electrocatalytic oxygen evolution

“…12 Then, the LM NSs were transformed into layered Ti 3 C 2 -Na-TiO 2 MXene nanofibers (LM-Na-TO NF) with larger interlayer spacing through the ''shearing effect'' of alkaline NaOH. 13,14 At the same time, Ti 3 C 2 would react with NaOH to form sodium titanate (Ti 3 C 2 + 4.69NaOH + 4.8275O 2 -3Na 0.23 TiO 2 + 2Na 2 CO 3 + 2.345H 2 O), 13,15 which presents a layered structure with Na cation located at the interlayers and can provide a greater ion exchange capacity. 16,17 Afterwards, Na + ions in the MXene matrix could be easily exchanged by H + and Co 2+ .…”

Functional Tailoring of Multi‐Dimensional Pure MXene Nanostructures for Significantly Accelerated Electromagnetic Wave Absorption

“…During sulfuric acid washing, Ti atomic vacancies induce internal stress, leading to the formation of porous folded structures in the MXene monolayer, further increasing the interfacial loss of the specimens. [ 23 ] The elemental mapping image in Figure S4 (Supporting Information) confirms that Ti elements and surface O elements are uniformly distributed throughout the P‐MXene ML. On the other hand, after L‐MXene is directly processed by the molten salt method, a porous Ti 3 C 2 T x MXene layer (P‐MXene L) can be obtained, which is composed of a large number of ultrathin nanosheets (Figure 1e; Figure S4, Supporting Information).…”

“…The high‑resolution C 1s XPS spectra (Figure 3d) can be fitted to four peaks related to the COOH (288.5 eV), CO (286.6 eV), CC (284.8 eV), and CTi (281.6 eV). [ 23 ] L‐MXene provides a strong CTi signal due to the presence of Ti 3 C 2 T x species. However, the CTi bonds in N‐MXene NRs mostly disappear, indicating that KOH breaks the CTi bonds.…”

“…Synthesis of Network-Like Ti 3 C 2 T x MXene Nanoribbons (N-MXene NRs): Network-like Ti 3 C 2 T x MXene nanoribbons (N-MXene NRs) were fabricated with the assistance of the "shearing effect" for KOH. [23] First, 0.5 g of the L-MXene prepared above was added to the KOH solution (6 mol L −1 , ≥95%, Sinopharm Chemical Reagent Co., Ltd.) and stirred for 5 days. The precipitate was then collected by centrifugation and washed several times with deionized water.…”

Regulated electron migration in sandwich-like m-Ti3C2/Fe3O4 composites derived from electrostatic assembly boosted electromagnetic wave absorption

“…8,9 In actuality, substantial impedance mismatch leads to the poor absorption capacity of pure MXenes as a result of redundant complex permittivity caused by excessive conductivity, which is exacerbated by the single attenuation mechanism. [10][11][12][13] Fortunately, the abundance of active centers provided by naturally occurring surface functional groups (such as -O, -OH, and -F) makes modication possible and presents chances to increase the ability of MXenes to absorb EM energy. 14,15 Generally, constructing composites with magnetic components is typically regarded as an efficient modication method.…”