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含高浓度本征缺陷的新型TiO_2:外来陷阱诱导产生可见光光催化活性 被引量:4

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摘要 纳米管钛酸在高温空气中(400℃≤T≤600℃)脱水得到含有高浓度束缚单电子氧空位(Vo˙)的新型TiO2.该TiO2体相中含有高浓度本征缺陷,表面却保持完整的化学计量比,具有可见光吸收、空气中十分稳定的性质,我们称之为第三代TiO2.但令人难解的是,该新型TiO2有可见光吸收却无可见光催化活性.本文对这种新型TiO2的导带电子寿命、光学行为特性等进行了研究,找出其在可见光下不显示反应活性的原因,提出在其表面构建外来电子陷阱,使可见光激发产生的体相光生电子转移到表面,从而成功地获得了一种具有可见光活性的光催化剂.
出处 《科学通报》 EI CAS CSCD 北大核心 2013年第11期1007-1013,共7页 Chinese Science Bulletin
基金 国家自然科学基金(21103042) 高等学校博士点新教师基金(20114103120001) 河南大学科研基金(2010YBZR013)资助
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