催化作用
介孔二氧化硅
纳米材料基催化剂
材料科学
牙本质
组氨酸
水溶液中的金属离子
橙色(颜色)
核化学
纳米颗粒
金属
介孔材料
螯合作用
牙釉质
搪瓷漆
化学
纳米技术
冶金
有机化学
酶
复合材料
食品科学
作者
Bor‐Shiunn Lee,Lichun Huang,Chen-Yu Hong,Shy‐Guey Wang,Wei-Hang Hsu,Yusuke Yamauchi,Chia‐Jung Hsieh,Juin‐Yih Lai,Kevin C.‐W. Wu
标识
DOI:10.1016/j.actbio.2011.01.007
摘要
Several metal ion–histidine complex functionalized mesoporous silica nanoparticles (MSN) were synthesized and utilized as efficient catalysts for enhanced and light-free tooth bleaching. Fe(II), Mn(II), and Cu(II) ions were successfully immobilized in histidine-functionalized MSN and their catalytic abilities against discoloration of a dye (Orange II) in both test tubes and extracted tooth models were compared and discussed. Through direct observation of test tubes and calculation of mean color changes of extracted teeth we concluded that Fe(II)–his–MSN exhibited better catalytic competence than Mn(II)–his–MSN and Cu(II)–his–MSN because of its intrinsic redox ability. In test tubes Orange II was completely degraded within 6 h when Fe(II)–his–MSN was used as the catalyst. For the extracted tooth model the presence of Fe(II)– or Mn(II)–his–MSN significantly enhanced the efficacy of tooth bleaching for three regions, the enamel, outer dentin, and inner dentin, of stained teeth compared with H2O2 alone. Furthermore, unlike current tooth bleaching techniques that need an LED or laser to catalyze H2O2 bleaching, we demonstrated a light-free tooth bleaching system using Fe(II)–his–MSN as an efficient and reliable catalyst.
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