Effect of ammonia or nitric acid treatment on surface structure, in vitro apatite formation, and visible-light photocatalytic activity of bioactive titanium metal
Effect of ammonia or nitric acid treatment on surface structure, in vitro apatite formation, and visible-light photocatalytic activity of bioactive titanium metal
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DOI：
10.1016/j.colsurfb.2013.06.049
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发表时间：
2013-11-01
影响因子：
5.8
通讯作者：
Kanetaka, Hiroyasu
中科院分区：
文献类型：
--
作者：
Kawashita, Masakazu;Matsui, Naoko;Kanetaka, Hiroyasu
经NaOH、NH_4OH和加热处理后再浸泡在模拟体液中的钛金属显示出体外磷灰石的形成，而经NaOH、HNO_3和加热处理后再浸泡在模拟体液中的钛金属则没有。经NaOH、NH_4OH和热处理后再浸泡于SBF中的钛金属表面形成的纳米TiO_2沉淀和/或细小的网状结构可能是钛金属表面形成磷灰石的原因。NaOH、NH_4OH和热处理可在钛金属表面生成氮掺杂的TiO_2，且经NaOH、NH_4OH和热处理的钛金属样品中亚甲基蓝（MB）的浓度比未经处理的和经NaOH和热处理的样品中降低更多。这一初步结果表明，用NaOH、NH 4 OH和热处理的Ti金属具有在可见光下显示光催化活性的潜力。(C)2013爱思唯尔有限公司版权所有。
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. (C) 2013 Elsevier B.V. All rights reserved.