Study of Chitosan-Stabilized Ti3C2T x MXene for Ultrasensitive and Interference-Free Detection of Gaseous H2O2

The development of sensitive, selective, and reliablegaseous hydrogenperoxide (H2O2) sensors operating at room temperaturestill represents a remaining challenge. In this work, we have investigatedand combined the advantageous properties of a two-dimensional Ti3C2T (x) MXene materialthat exhibits a large specific surface area and high surface activity,with favorable conducting and stabilizing properties of chitosan.The MXene-chitosan membrane was deposited on the ferrocyanide-modifiedscreen-printed working carbon electrode, followed by applying poly(acrylicacid) as an electrolyte and accumulation medium for gaseous H2O2. The sensor showed highly sensitive and selectiveelectroanalytical performance for detecting trace concentrations ofgaseous H2O2 with a very low detection limitof 4 & mu;g m(-3) (4 ppbv), linear response in thestudied concentration range of 0.5-30.0 mg m(-3), and good reproducibility with an RSD of 1.3%. The applicabilityof the sensor was demonstrated by point-of-interest detection of gaseousH(2)O(2) during the real hair bleaching processwith a 9 and 12% H2O2 solution.

Automated summary

In this study, a MXene-chitosan membrane was developed for the detection of gaseous H2O2. The sensor showed high sensitivity, selectivity, and reproducibility, with a low detection limit of 4 μg m(-3) and a linear response in the concentration range of 0.5-30.0 mg m(-3).