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新型TiO₂F纳米颗粒向簇状TiO-{001/101}的转变及其在模拟阳光下对盐酸四环素的降解

Transformation of novel TiOF nanoparticles to cluster TiO-{001/101} and its degradation of tetracycline hydrochloride under simulated sunlight.

作者信息

Jian Yue, Liu Huayang, Zhu Jiaming, Zeng Yaqiong, Liu Zuohua, Hou Chentao, Pu Shihua

机构信息

Chongqing Academy of Animal Sciences Chongqing 402460 China

Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture and Rural Affairs Chongqing 402460 China.

出版信息

RSC Adv. 2020 Nov 24;10(70):42860-42873. doi: 10.1039/d0ra08476j. eCollection 2020 Nov 23.

DOI:10.1039/d0ra08476j
PMID:35514916
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9058001/
Abstract

The anatase type cluster TiO-{001/101} was rapidly generated by a one-step hydrothermal method. The transformation process of coral-like TiOF nanoparticles to cluster TiO-{001/101} was investigated for the first time, and the sensitization between cluster TiO-{001/101} and tetracycline hydrochloride (TCH) was also discussed. The degradation rate of TCH by cluster TiO-{001/101} under simulated sunlight was 92.3%, and the total removal rate was 1.76 times that of P25. Besides, cluster TiO-{001/101} settles more easily than P25 in deionized water. The study showed that cluster TiO-{001/101} derived from coral-like TiOF nanoparticles had a strong adsorption effect on TCH, which was attributed to the oxygen vacancy (O) and {001} facets of cluster TiO-{001/101}. The strong adsorption effect promoted the sensitization between cluster TiO-{001/101} and TCH, and widened the visible light absorption range of cluster TiO-{001/101}. In addition, the fluorescence emission spectrum showed that cluster TiO-{001/101} had a lower luminous intensity, which was attributed to the heterojunction formed by {001} facets and {101} facets that reduces the recombination rate of carriers. It should be noted that cluster TiO-{001/101} still has good degradation performance for TCH after five cycles of degradation. This study provides a new idea for the synthesis of cluster TiO-{001/101} with high photocatalytic performance for the treatment of TCH wastewater.

摘要

通过一步水热法快速生成了锐钛矿型簇状TiO-{001/101}。首次研究了珊瑚状TiOF纳米颗粒向簇状TiO-{001/101}的转变过程，并讨论了簇状TiO-{001/101}与盐酸四环素（TCH）之间的敏化作用。在模拟太阳光下，簇状TiO-{001/101}对TCH的降解率为92.3%，总去除率是P25的1.76倍。此外，在去离子水中，簇状TiO-{001/101}比P25更容易沉降。研究表明，源自珊瑚状TiOF纳米颗粒的簇状TiO-{001/101}对TCH具有较强的吸附作用，这归因于簇状TiO-{001/101}的氧空位（O）和{001}晶面。这种强吸附作用促进了簇状TiO-{001/101}与TCH之间的敏化作用，并拓宽了簇状TiO-{001/101}的可见光吸收范围。此外，荧光发射光谱表明簇状TiO-{001/101}的发光强度较低，这归因于{001}晶面和{101}晶面形成的异质结降低了载流子的复合率。需要注意的是，簇状TiO-{001/101}在经过五次降解循环后对TCH仍具有良好的降解性能。该研究为合成具有高光催化性能的簇状TiO-{001/101}用于处理TCH废水提供了新思路。

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