材料科学
牙齿美白
过氧化氢
搪瓷漆
罗丹明B
乳白色
催化作用
亚甲蓝
核化学
纳米颗粒
光热治疗
橙色(颜色)
氧气
光催化
光化学
化学
纳米技术
有机化学
复合材料
物理
量子力学
食品科学
作者
Xingyu Hu,Li Xie,Zhaoyu Xu,Suru Liu,Xinzhi Tan,Ruojing Qian,Ruitao Zhang,Mingyan Jiang,Wenjia Xie,Weidong Tian
标识
DOI:10.1021/acsami.1c06774
摘要
The growing demand for charming smiles has led to the popularization of tooth bleaching procedures. Current tooth bleaching products with high-concentration hydrogen peroxide (HP, 30–40%) are effective but detrimental due to the increased risk of enamel destruction, tooth sensitivity, and gingival irritation. Herein, we reported a less-destructive and efficient tooth whitening strategy with a low-concentration HP, which was realized by the remarkably enhanced Fenton-like catalytic activity of oxygen-deficient TiO2 (TiO2–x). TiO2–x nanoparticles were synthesized with a modified solid-state chemical reduction approach with NaBH4. The Fenton-like activity of TiO2–x was optimized by manipulating oxygen vacancy (OV) concentration and further promoted by the near-infrared (NIR)-induced photothermal effect of TiO2–x. The TiO2–x sample named BT45 was chosen due to the highest methylene blue (MB) adsorption ability and Fenton-like activity among acquired samples. The photothermal property of BT45 under 808 nm NIR irradiation was verified and its enhancement on Fenton-like activity was also studied. The BT45/HP + NIR group performed significantly better in tooth whitening than the HP + NIR group on various discolored teeth (stained by Orange II, tea, or rhodamine B). Excitingly, the same tooth whitening performance as the Opalescence Boost, a tooth bleaching product containing 40% HP, was obtained by a self-produced bleaching gel based on this novel system containing 12% HP. Besides, negligible enamel destruction, safe temperature range, and good cytocompatibility of TiO2–x nanoparticles also demonstrated the safety of this tooth bleaching strategy. This work indicated that the photothermal-enhanced Fenton-like performance of the TiO2–x-based system is highly promising in tooth bleaching application and can also be extended to other biomedical applications.
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