Rapid synthesis of MXenes at room temperature

Abstract

Ti3C2, one of the most studied MXenes (M is an early transition metal, and X is either C or N), has attracted considerable attention due to their excellent electrical conductivity, hydrophilicity, and catalytic activity. To date, most MXenes are prepared from powders and chemical etching under conditions of either long duration (generally ≥8 h) or high temperature (generally ≥35°C). In this study, Ti3C2 with –F and –O/–OH terminal groups was successfully obtained by electrochemically etching porous Ti3AlC2 sheet electrodes in NH4HF2 solution at room temperature. The reaction mechanism and the effect of voltage were demonstrated. Electrochemical etching could induce subsequent over-etching to generate carbide-derived carbons.

A Review on Recent Trends and Future Developments in Electrochemical Sensing

“…Thus, a strategy of in situ fluorine ion generation is used to delaminate MXene in low-concentrated aqueous media . Using thermal-assisted electrochemical etching methods for MXene synthesis, Ti 3 AlC 2 can be delaminated at room temperature with nontoxic solutions . In turn, this results in more catalytic sites and fewer undesired functional groups when using a beneficial solvent in combination with a green acidic treatment. , For sensing interfaces, MXene can be functionalized with negative charge groups to perform electrocatalytic functions .…”

Fluorine-free mechanochemical synthesis of MXene

“…The broad MXenes family and their diverse range of properties open the door to a multitude of applications in energy storage devices, flexible bioelectronics, water desalination, catalysis, electromagnetic interference shielding, sensors and actuators [9][10][11][12][13][14][15][16][17][18]. To date, most MXenes have been prepared through a wet chemical etching method [19] where A-element atomic layers (e.g. aluminium) are etched from the M n + 1 AX n phase (e.g.…”

A Review on Synthesis of 2-Dimensional Mn+1X (MXene) materials

“…The key purpose of the review is to construct 2D transition layers of metallic carbides, carbonitrides and nitrides i.e. MXenes by various ways [86]…”