摘要
The hybrid TiO_(2)/AgNPs/g-C_(3) N_(4) nanocomposite coatings were constructed on TC4 alloy by a hydrothermal and calcining method.TiO_(2)/AgNPs/g-C_(3) N_(4) nanocomposite coatings demonstrated excellent biocompatibility and osteogenesis compared to those of titanium alloy.The existence of trace AgNPs on the surface and interface of the heterojunction could further enhance the transfer and separation of photogenerated electron/hole pairs,which greatly improved the antibacterial performance under full spectrum light.Holes at the valence band of TiO_(2) and g-C_(3) N_(4) reacted with adsorbed H_(2) O to generate·OH,killing bacteria through photocatalytic redox reaction under light irradiation,while released AgNPs exhibited bacteriostatic efficacy with or without light.This study provides a pathway of coating modification for further improving the antibacterial properties of heterojunction coatings and maintaining the biocompatibility of matrix materials.
基金
supported by the National Natural Science Foundation of China (No. 51801164)
Fundamental Research Funds for Central Universities (No. XDJK2020C005)
Chongqing Key Laboratory fund of Soft-Matter Material Chemistry and Function Manufacturing (No. 20200006)
Venture&Innovation Support Program for Chongqing Overseas Returnees (No. cx2018080)
Chongqing College Student innovation and Entrepreneurship Program of Southwest University (No. 202010635076)
Zeng Sumin grogram of School of Materials and Energy in Southwest University (No.zsm20201017)。
