Remarkable Charge Separation and Photocatalytic Efficiency Enhancement through Interconnection of TiO2 Nanoparticles by Hydrothermal Treatment
Remarkable Charge Separation and Photocatalytic Efficiency Enhancement through Interconnection of TiO2 Nanoparticles by Hydrothermal Treatment
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DOI：
10.1002/anie.201510000
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发表时间：
2016-03-07
影响因子：
16.6
通讯作者：
Sugahara, Yoshiyuki
中科院分区：
文献类型：
--
作者：
Ide, Yusuke;Inami, Nozomu;Sugahara, Yoshiyuki
尽管人们已经付出了巨大的努力来合成先进的TiO 2，但仍然很难获得表现出比基准光催化剂P25更高的光催化效率的TiO 2。P25由锐钛矿、金红石和无定形TiO 2颗粒组成，锐钛矿-金红石颗粒界面处的光激发电子转移和随后的电荷分离解释了其高的光催化效率。在这里，我们报告了一个简单的和合理的水热处理P25选择性地将无定形组分转化为结晶TiO 2，它是原来的金红石和金红石颗粒之间的沉积，以增加颗粒界面，从而提高电荷分离。这种方法产生了一种新的二氧化钛，表现出相当增强的光催化效率。这种合成这种二氧化钛的方法，灵感来自最近蓬勃发展的沸石设计，有望使二氧化钛的应用更加可行和有效。
Although tremendous effort has been directed to synthesizing advanced TiO2, it remains difficult to obtain TiO2 exhibiting a photocatalytic efficiency higher than that of P25, a benchmark photocatalyst. P25 is composed of anatase, rutile, and amorphous TiO2 particles, and photoexcited electron transfer and subsequent charge separation at the anatase-rutile particle interfaces explain its high photocatalytic efficiency. Herein, we report on a facile and rational hydrothermal treatment of P25 to selectively convert the amorphous component into crystalline TiO2, which is deposited between the original anatase and rutile particles to increase the particle interfaces and thus enhance charge separation. This process produces a new TiO2 exhibiting a considerably enhanced photocatalytic efficiency. This method of synthesizing this TiO2, inspired by a recently burgeoning zeolite design, promises to make TiO2 applications more feasible and effective.