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氮掺杂TiO₂的光催化与抗菌性能：表面结构依赖性及银沉积效应

The Photocatalytic and Antibacterial Performance of Nitrogen-Doped TiO: Surface-Structure Dependence and Silver-Deposition Effect.

作者信息

Wafi Abdul, Szabó-Bárdos Erzsébet, Horváth Ottó, Pósfai Mihály, Makó Éva, Juzsakova Tatjána, Fónagy Orsolya

机构信息

Department of General and Inorganic Chemistry, Center for Natural Sciences, University of Pannonia, H-8210 Veszprem, POB. 1158, Hungary.

Laboratory of Pharmaceutical Chemistry, Department of Pharmacy, Universitas Islam Negeri Maulana Malik Ibrahim Malang, Malang 65144, Indonesia.

出版信息

Nanomaterials (Basel). 2020 Nov 15;10(11):2261. doi: 10.3390/nano10112261.

DOI:10.3390/nano10112261
PMID:33203178
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7697533/
Abstract

Catalysts for visible-light-driven oxidative cleaning processes and antibacterial applications (also in the dark) were developed. In order to extend the photoactivity of titanium dioxide into the visible region, nitrogen-doped TiO catalysts with hollow and non-hollow structures were synthesized by co-precipitation (NT-A) and sol-gel (NT-U) methods, respectively. To increase their photocatalytic and antibacterial efficiencies, various amounts of silver were successfully loaded on the surfaces of these catalysts by using a facile photo-deposition technique. Their physical and chemical properties were evaluated by using scanning electron microscopy (SEM), transmission electron microscopy-energy dispersive X-ray spectroscopy (TEM-EDS), Brunauer-Emmett-Teller (BET) surface area, X-ray diffraction (XRD), and diffuse reflectance spectra (DRS). The photocatalytic performances of the synthesized catalysts were examined in coumarin and 1,4-hydroquinone solutions. The results showed that the hollow structure of NT-A played an important role in obtaining high specific surface area and appreciable photoactivity. In addition, Ag-loading on the surface of non-hollow structured NT-U could double the photocatalytic performance with an optimum Ag concentration of 10 mol g, while a slight but monotonous decrease was caused in this respect for the hollow surface of NTA upon increasing Ag concentration. Comparing the catalysts with different structures regarding the photocatalytic performance, silverized non-hollow NT-U proved competitive with the hollow NT-A catalyst without Ag-loading for efficient visible-light-driven photocatalytic oxidative degradations. The former one, due to the silver nanoparticles on the catalyst surface, displayed an appreciable antibacterial activity, which was comparable to that of a reference material practically applied for disinfection in polymer coatings.

摘要

开发了用于可见光驱动的氧化清洁过程和抗菌应用（包括在黑暗中）的催化剂。为了将二氧化钛的光活性扩展到可见光区域，分别通过共沉淀法（NT-A）和溶胶-凝胶法（NT-U）合成了具有空心和非空心结构的氮掺杂TiO催化剂。为了提高它们的光催化和抗菌效率，通过一种简便的光沉积技术成功地在这些催化剂表面负载了不同量的银。使用扫描电子显微镜（SEM）、透射电子显微镜-能量色散X射线光谱（TEM-EDS）、布鲁诺尔-埃米特-泰勒（BET）表面积、X射线衍射（XRD）和漫反射光谱（DRS）对它们的物理和化学性质进行了评估。在香豆素和1,4-对苯二酚溶液中考察了合成催化剂的光催化性能。结果表明，NT-A的空心结构在获得高比表面积和可观的光活性方面起了重要作用。此外，在非空心结构的NT-U表面负载银，在最佳银浓度为10 mol g时，光催化性能可提高一倍，而对于NT-A的空心表面，随着银浓度的增加，在这方面会导致轻微但单调的下降。比较不同结构催化剂的光催化性能，银化的非空心NT-U在高效可见光驱动的光催化氧化降解方面与未负载银的空心NT-A催化剂具有竞争力。前者由于催化剂表面的银纳米颗粒，表现出可观的抗菌活性，这与实际应用于聚合物涂层消毒的参考材料相当。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/5d6501fabb19/nanomaterials-10-02261-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/364577582896/nanomaterials-10-02261-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/d1c48f4f4e4d/nanomaterials-10-02261-g010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/5d6501fabb19/nanomaterials-10-02261-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/9d3ef6fa871c/nanomaterials-10-02261-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/1bfe22cae197/nanomaterials-10-02261-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/adea8633e1b9/nanomaterials-10-02261-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/86af7377ec4d/nanomaterials-10-02261-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/62e87d1e78a0/nanomaterials-10-02261-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/42f6594a3afa/nanomaterials-10-02261-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/c440946ed50a/nanomaterials-10-02261-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/364577582896/nanomaterials-10-02261-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/4392cc3e675c/nanomaterials-10-02261-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/d1c48f4f4e4d/nanomaterials-10-02261-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/5847e2be8b57/nanomaterials-10-02261-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/e778f71f1aed/nanomaterials-10-02261-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9be8/7697533/5d6501fabb19/nanomaterials-10-02261-g013.jpg

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