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首页> 外文期刊>Journal of industrial and engineering chemistry >Visible-light-driven photocatalyst of La-N-codoped TiO2 nano-photocatalyst: Fabrication and its enhanced photocatalytic performance and mechanism
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Visible-light-driven photocatalyst of La-N-codoped TiO2 nano-photocatalyst: Fabrication and its enhanced photocatalytic performance and mechanism

机译：La-N掺杂TiO2纳米光催化剂的可见光驱动光催化剂：其制备及其增强的光催化性能和机理

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摘要

In this study, La, N codoped TiO2 (La-N-TiO2) nano-photocatalyst was fabricated through simple sot-gel method. The resulting samples were characterized through X-ray diffraction (XRD), scanning electrons microscope (SEM), transmission electrons microscope (TEM), X-ray photoelectron spectroscopy (XPS) and UV-visible light diffuse reflection spectroscopy (UV-vis DRS). Results revealed that La elements were not implanted into the structure of TiO2 but existed as the form of Ti-O-La bonds in the interstitial site, while N dopants were incorporated into the lattice of TiO2 and coexisted in the substitutional N (N-Ti-O) and interstitial N (Ti-O-N) in the La-N-TiO2 catalyst, thereby resulting in the formation of new impurity energy level between the forbidden band and greatly enhancement of light absorption ability in visible light region. The enhanced visible light driven (VLD) photocatalytic (PC) performance for the degradation of phenol aqueous solution could be attributed to the intense light absorbance in visible light region and high separation efficiency of photogenerated charge carriers. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：本研究通过简单的凝胶法制备了La，N共掺杂的TiO2（La-N-TiO2）纳米光催化剂。通过X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线光电子能谱（XPS）和紫外可见光漫反射光谱（UV-vis DRS）对所得样品进行表征。结果表明，La元素没有注入到TiO2的结构中，而是以Ti-O-La键的形式存在于间隙位置，而N掺杂剂被掺入TiO2的晶格中并共存于取代的N（N-Ti -O）和La-N-TiO2催化剂中的间隙N（Ti-ON），从而导致在禁带之间形成新的杂质能级，并大大提高了可见光区域的光吸收能力。可见光驱动（VLD）光催化（PC）降解苯酚水溶液的性能增强，这归因于可见光区的强光吸收和光生载流子的高分离效率。 （C）2014韩国工业和工程化学学会。由Elsevier B.V.发布。保留所有权利。

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