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以三乙醇胺水溶液为介质构建纺锤形钛自掺杂二氧化钛光催化剂及其光电化学性质

Construction of Spindle-Shaped Ti Self-Doped TiO Photocatalysts Using Triethanolamine-Aqueous as the Medium and Its Photoelectrochemical Properties.

作者信息

Hu Zunfu, Gong Qi, Wang Jiajia, Zheng Xiuwen, Wang Aihua, Gao Shanmin

机构信息

School of Materials Science and Engineering, Linyi University, Linyi 276005, China.

School of Chemistry & Chemical Engineering, Linyi University, Linyi 276005, China.

出版信息

Nanomaterials (Basel). 2022 Jul 4;12(13):2298. doi: 10.3390/nano12132298.

DOI:10.3390/nano12132298
PMID:35808134
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9268407/
Abstract

To enhance the utilization efficiency of visible light and reduce the recombination of photogenerated electrons and holes, spindle-shaped TiO photocatalysts with different Ti concentrations were fabricated by a simple solvothermal strategy using low-cost, environmentally friendly TiH and HO as raw materials and triethanolamine-aqueous as the medium. The photocatalytic activities of the obtained photocatalysts were investigated in the presence of visible light. X-ray diffraction (XRD), Raman spectra, transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FT-IR) spectra were applied to characterize the structure, morphologies, and chemical compositions of as-fabricated Ti self-doped TiO. The concentration of triethanolamine in the mixed solvent plays a significant role on the crystallinity, morphologies, and photocatalytic activities. The electron-hole separation efficiency was found to increase with the increase in the aspect ratio of as-fabricated Ti self-doped TiO, which was proved by transient photocurrent response and electrochemical impedance spectroscopy.

摘要

为提高可见光的利用效率并减少光生电子与空穴的复合，以低成本、环境友好的TiH和HO为原料，三乙醇胺水溶液为介质，通过简单的溶剂热策略制备了不同Ti浓度的纺锤形TiO光催化剂。在可见光存在下研究了所得光催化剂的光催化活性。采用X射线衍射（XRD）、拉曼光谱、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和傅里叶变换红外（FT-IR）光谱对制备的Ti自掺杂TiO的结构、形貌和化学成分进行了表征。混合溶剂中三乙醇胺的浓度对结晶度、形貌和光催化活性有显著影响。通过瞬态光电流响应和电化学阻抗谱证明，制备的Ti自掺杂TiO的长径比增加，电子-空穴分离效率提高。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/f16eaa5d1828/nanomaterials-12-02298-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/e6d73d70b86b/nanomaterials-12-02298-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/591ee33f2d58/nanomaterials-12-02298-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/e0ba56796ae4/nanomaterials-12-02298-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/34eabbac0ff8/nanomaterials-12-02298-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/07e044beb0aa/nanomaterials-12-02298-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/7b004c0dc097/nanomaterials-12-02298-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/f106876af294/nanomaterials-12-02298-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/d1a2f61d1212/nanomaterials-12-02298-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/f16eaa5d1828/nanomaterials-12-02298-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/e6d73d70b86b/nanomaterials-12-02298-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/591ee33f2d58/nanomaterials-12-02298-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/e0ba56796ae4/nanomaterials-12-02298-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/34eabbac0ff8/nanomaterials-12-02298-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/07e044beb0aa/nanomaterials-12-02298-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/7b004c0dc097/nanomaterials-12-02298-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/f106876af294/nanomaterials-12-02298-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/d1a2f61d1212/nanomaterials-12-02298-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8ea8/9268407/f16eaa5d1828/nanomaterials-12-02298-g008.jpg

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