.png){kind=icon}
.png){kind=icon}
Return
In situ construction of Ti3C2 MXene/TiO2 heterojunctions with efficient piezoelectric catalytic activity for high antibacterial performance
.png){kind=icon}
PRE
AI
R
H
Q
X
B
DOI：10.1039/D6NR00403B.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
The practical application of two-dimensional MXenes in the field of piezoelectric catalytic antifouling is hindered by their inherent instability and insufficient active sites. To address this; we report a strategy for functionalizing Ti3C2 MXene via in situ alkaline oxidation; specifically by reconfiguring the surface termination groups and terminating the MXene surface with TiO2; to construct a heterostructure Ti3C2 MXene/TiO2 piezocatalyst. This approach not only stabilized the MXene structure but also significantly enhanced its piezocatalytic activity. The uniform growth of TiO2 nanowires on MXene layers; as confirmed by SEM and XRD; created a tightly coupled 1D/2D heterointerface. The optimized heterojunction exhibits excellent piezoelectric catalytic antibacterial efficiency under dark conditions; achieving antibacterial rates of 95.94% (Escherichia coli); 96.83% (Pseudomonas aeruginosa); and 78.2% (Staphylococcus aureus). It also demonstrates a high transient current density (21.89 μA cm−2) and outstanding cycling stability (the performance degradation was less than 7% even after 5 cycles). Combined experimental and DFT analyses reveal that the built-in electric field and work function difference at the heterojunction interface efficiently drive the charge separation and transfer; with ˙O2− and ˙OH being the primary reactive species. This work demonstrates a viable route for the performance enhancement and functional expansion of MXene; providing an effective reference for its application in mechanically driven antifouling technologies.
Journal
IF:
5.1
Papers:
3.0W
Citations:
11.6W
Organization
Cited Papers