PEG pretreated Ti3C2 MXene

The concentration of MXene colloid was determined by weighing specific amounts of dispersion though freezedrying at −60 °C for 48 h. For preparing PEG pretreated Ti3C2 MXene,the given mass of PEG solution (PEG/MXene = 1/2, w/w) was poured into MXene colloid with magnetic stirring for 60 min and then freezedried at −60 °C for 96 h.