具有锐钛矿/金红石异质结的TiO纳米带用于高效光催化全水分解。
TiO nanobelts with anatase/rutile heterophase junctions for highly efficient photocatalytic overall water splitting.
作者信息
Ding Lei, Yang Shaorui, Liang Zhangqian, Qian Xiu, Chen Xiaoyue, Cui Hongzhi, Tian Jian
机构信息
School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
出版信息
J Colloid Interface Sci. 2020 May 1;567:181-189. doi: 10.1016/j.jcis.2020.02.014. Epub 2020 Feb 6.
Herein, we report surface coarsened titanium dioxide (TiO) nanobelts with anatase/rutile heterophase junctions via a facile hydrothermal/calcination method for simultaneous hydrogen (H) and oxygen (O) productions from pure water, with excellent production rates of 0.614 and 0.297 mmol h g with platinum (Pt)/cobalt phosphide (CoP) as cocatalysts, respectively. Besides, the TiO nanobelts-900 °C with anatase/rutile heterophase junctions show a notable improvement in photocatalytic H and O production than pure anatase TiO nanobelts (TiO nanobelts-600 °C, 700 °C and 800 °C) and pure rutile TiO nanobelts (TiO nanobelts-1000 °C). The anatase/rutile heterophase junctions could effectively stimulate the transfer of electrons from rutile to anatase and then to Pt, and H generation on the surface of Pt. In the meantime, the holes can be transferred from anatase to rutile and then to CoP, and water oxidation on CoP's surface.
在此，我们报道了通过简便的水热/煅烧方法制备的具有锐钛矿/金红石异质结的表面粗糙化二氧化钛（TiO₂）纳米带，用于从纯水中同时产氢（H₂）和产氧（O₂），以铂（Pt）/磷化钴（CoP）作为助催化剂时，产率分别高达0.614和0.297 mmol h⁻¹ g⁻¹。此外，具有锐钛矿/金红石异质结的900℃ TiO₂纳米带在光催化产氢和产氧方面比纯锐钛矿TiO₂纳米带（600℃、700℃和800℃的TiO₂纳米带）以及纯金红石TiO₂纳米带（1000℃的TiO₂纳米带）有显著提高。锐钛矿/金红石异质结能够有效地促进电子从金红石转移到锐钛矿，再转移到Pt，并在Pt表面产生H₂。与此同时，空穴可以从锐钛矿转移到金红石，再转移到CoP，并在CoP表面发生水氧化反应。
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