Enhanced Biological Behavior and Photothermal Antibacterial Performance of TiNbCTx MXene Modified Mesoporous Bioactive Glass Nanocomposites

Mesoporous bioactive glasses (MBGs) are gaining recognition in bone tissue engineering for their osteoblast differentiation-inducing properties and customizable structures. However, the challenge of peri-implantitis has hindered their broader application. To address this, double transition metal TiNbCT x MXene acted as near-infrared (NIR) photothermal agent, has been integrated with MBG nanospheres to develop novel multifunctional TiNbCT x /MBG (TNC/MBG) nanocomposites in this work. The results demonstrate that the TNC/MBG composites feature uniform mesoporous spherical MBG nanoparticles on TiNbCT x nanosheets, boasting a significantly enhanced specific surface area of up to 444.74 m 2 g −1 and a more negative zeta potential than pristine MBG. Importantly, the TNC/MBG nanocomposites can effectively promote apatite formation, as well as the proliferation and viability of MC3T3-E1 cells. Moreover, it is highlighted that the TNC/MBG nanocomposites display remarkable photothermal conversion efficiency and stability, leading to over 95% antibacterial inhibition rates against both S. aureus and E. coli under NIR irradiation. These findings offer an appealing strategy to develop multifunctional TNC/MBG nanocomposites with enhanced biological activity and robust antibacterial properties, which shows great potential for various biomedical applications.