Preparation of carbon-coated brookite@anatase TiO2 heterophase junction nanocables with enhanced photocatalytic performance.,Photochemical & Photobiological Sciences

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Preparation of carbon-coated brookite@anatase TiO2 heterophase junction nanocables with enhanced photocatalytic performance.
Photochemical & Photobiological Sciences ( IF 2.7 ) Pub Date : 2020-05-21 , DOI: 10.1039/d0pp00004c
Rui Tan ₁ , Yonglin Wang ₁ , Zhouzheng Jin ₁ , Peng Zhang ₁ , Hengzhi Luo ₂ , Dan Liu _{1,

3} , Bhekie B Mamba ₃ , Alex T Kuvarega ₃ , Jianzhou Gui _{1,

3}

Affiliation

One-dimensional TiO₂@C nanocables with a heterophase junction have been successfully prepared by coating brookite@anatase TiO₂ with a thin layer of hydrothermal carbon (HTC). Compared with anatase TiO₂, the biphase brookite@anatase structure can reduce the recombination rate of the excited electron/hole pairs of TiO₂. The HTC coating not only enhances the adsorption capability of the TiO₂ catalyst for organic pollutants but also facilitates photogenerated electron transfer to further increase its photocatalytic activity. Therefore, compared with anatase TiO₂, brookite@anatase TiO₂, and TiO₂@C, the brookite@anatase TiO₂@C shows the highest photocatalytic activity for the photodegradation of tetracycline (TC) under the irradiation of UV-visible light. Moreover, ˙O₂ has been proved to be the predominant active species for the photodegradation of TC, and the photocatalytic mechanism of brookite@anatase TiO₂@C nanocables has also been proposed.

中文翻译：

具有增强光催化性能的碳包覆板钛矿/锐钛矿型TiO2异相结纳米电缆的制备。

通过用水热碳（HTC）薄层覆盖板钛矿型锐钛矿型TiO ₂已经成功地制备了具有异相结的一维TiO ₂ @C纳米电缆。与锐钛矿型TiO ₂相比，双相板钛矿型锐钛矿结构可以降低TiO ₂的激发电子/空穴对的复合率。HTC涂层不仅增强了TiO ₂催化剂对有机污染物的吸附能力，而且还促进了光生电子的转移，从而进一步提高了其光催化活性。因此，与锐钛矿型TiO ₂，板钛矿型锐钛矿型TiO ₂和TiO ₂ @C相比，板钛矿型锐钛矿型TiO ₂在紫外线可见光的照射下，@ C显示出对四环素（TC）的光降解的最高光催化活性。此外，邻₂已被证明是TC的光降解的主要活性物质，和板钛矿@锐钛矿二氧化钛的光催化机理₂ @C纳米电缆也被提出。

更新日期：2020-07-15

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