Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering , Hubei University , Wuhan 430062 , China.
School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China , Tianjin University , Tianjin 300072 , China.
ACS Appl Mater Interfaces. 2019 Sep 18;11(37):34364-34375. doi: 10.1021/acsami.9b12629. Epub 2019 Sep 5.
In this study, a multifunctional hybrid coating composed of AgBr nanoparticles (AgBrNPs) and two-dimensional molybdenum sulfide (MoS) nanosheets (AgBr@MoS) was constructed on Ti implant materials using an in situ growth method for the first time. With 660 nm light and visible light irradiation, the electrons were rapidly excited from the valence band of MoS to its conduction band, at the same time, AgBrNPs was used as a photoelectric receiver, which exhibited an enhanced photocatalytic activity due to the rapid transfer of photoelectrons from MoS nanosheets to AgBrNPs and the suppression of the recombination of electron-hole pairs. This contributed to the rapid production of reactive oxygen species under 660 nm light irradiation, thus the AgBr@MoS system killed bacteria and degraded organic matter quickly and efficiently in a short time. Meanwhile, the AgBr@MoS system showed excellent stability due to the strong covalent binding between S and Ag in the system, thus preventing AgBrNPs from being reduced to metal Ag.
在这项研究中，首次采用原位生长法在 Ti 植入材料上构建了由 AgBr 纳米粒子 (AgBrNPs) 和二维二硫化钼 (MoS) 纳米片 (AgBr@MoS) 组成的多功能杂化涂层。在 660nm 光和可见光照射下，电子从 MoS 的价带迅速被激发到导带，同时，AgBrNPs 被用作光电接收器，由于 MoS 纳米片到 AgBrNPs 的光电子快速转移和抑制电子-空穴对的复合，表现出增强的光催化活性。这有助于在 660nm 光照射下快速产生活性氧物质，从而使 AgBr@MoS 体系在短时间内快速高效地杀死细菌和降解有机物。同时，由于体系中 S 和 Ag 之间的强共价键，AgBr@MoS 体系表现出优异的稳定性，从而防止 AgBrNPs 还原为金属 Ag。
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