氨或硝酸处理对生物活性钛金属表面结构、体外磷灰石形成和可见光光催化活性的影响。
Effect of ammonia or nitric acid treatment on surface structure, in vitro apatite formation, and visible-light photocatalytic activity of bioactive titanium metal.
机构信息
Graduate School of Biomedical Engineering, Tohoku University, Sendai 980-8579, Japan.
Graduate School of Biomedical Engineering, Tohoku University, Sendai 980-8579, Japan.
出版信息
Colloids Surf B Biointerfaces. 2013 Nov 1;111:503-8. doi: 10.1016/j.colsurfb.2013.06.049. Epub 2013 Jul 9.
Ti metal treated with NaOH, NH4OH, and heat and then soaked in simulated body fluid (SBF) showed in vitro apatite formation whereas that treated with NaOH, HNO3, and heat and then soaked in SBF did not. The anatase TiO2 precipitate and/or the fine network structure formed on the surface of the Ti metal treated with NaOH, NH4OH, and heat and then soaked in SBF might be responsible for the formation of apatite on the surface of the metal. The NaOH, NH4OH, and heat treatments might produce nitrogen-doped TiO2 on the surface of the Ti metal, and the concentration of methylene blue (MB) in the Ti metal sample treated with NaOH, NH4OH, and heat decreased more than in the untreated and NaOH- and heat-treated ones. This preliminary result suggests that Ti metal treated with NaOH, NH4OH, and heat has the potential to show photocatalytic activity under visible light.
经 NaOH、NH4OH 和热处理后再浸泡于模拟体液（SBF）中的 Ti 金属表现出体外磷灰石形成，而经 NaOH、HNO3 和热处理后再浸泡于 SBF 中的 Ti 金属则没有。NaOH、NH4OH 和热处理后再浸泡于 SBF 中的 Ti 金属表面形成的锐钛矿 TiO2 沉淀物和/或精细网络结构可能是导致金属表面磷灰石形成的原因。NaOH、NH4OH 和热处理可能在 Ti 金属表面产生氮掺杂 TiO2，且经 NaOH、NH4OH 和热处理的 Ti 金属样品中亚甲基蓝（MB）的浓度比未经处理和仅经 NaOH 和热处理的样品降低更多。初步结果表明，经 NaOH、NH4OH 和热处理的 Ti 金属具有在可见光下表现出光催化活性的潜力。
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