We report a facile synthesis of MXene/bismuth ferrite (Ti 3 C 2 T x @ BiFeO 3 ) nanocomposites using hydrazine hydrate induced with the hydrothermal method. Preparation of the composite with hydrazine hydrate prevents the formation of Bi 25 FeO 39 inside the matrix. The 25 wt % loading of BiFeO 3 acts as spacers for the multilayer restacking of MXene flakes by retaining the (002) plane. This promotes large dc conductivity with interfacial and defect dipole polarization mechanisms inside the composite material. The thinner M-H loop also indicates the minimal magnetic loss inside the composites. The facile synthesis strategy provides outstanding properties in Ti 3 C 2 T x @ BiFeO 3 composites as two-dimensional multiferroic materials.

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Surface modification of Ti3C2Tx greatly enhances its charge storage mechanism as an electrode material. Herein, we demonstrate the role of surface terminals and heteroatoms in the electrochemical behavior of Ti3C2Tx electrodes. The abundance of –F and –OH surface terminals may be obtained with an acidic or base medium while etching of Ti3C2Tx. Further treatment with ammonia or glucose may help to get a thin layer of N or C at the surface of Ti3C2Tx. It is found that abundant reaction sites and larger interlayer spacing can help in improving the specific capacitance by nearly 2.5 times to unmodified Ti3C2Tx electrodes. This superior performance can be achieved without sacrificing the conductivity and accordion-like structure of Ti3C2Tx MXene two-dimensional material.