The Photocatalytic and Antibacterial Performance of Nitrogen-Doped TiO2 : Surface-Structure Dependence and Silver-Deposition Effect

Nanomaterials
Abdul WafiOrsolya Fónagy

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 TiO2 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 ...Continue Reading

References

Apr 28, 2009·Journal of Colloid and Interface Science·Gang LiuHui-Ming Cheng
Dec 28, 2010·Water Research·Erzsébet Szabó-BárdosGyula Kiss
Jun 15, 2012·ChemSusChem·Alessandro GalloVladimiro Dal Santo
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Jun 10, 2014·Journal of Colloid and Interface Science·Thanh-Dong Pham, Byeong-Kyu Lee
May 16, 2019·Nanomaterials·Parveen KumarBo Liu
Apr 3, 2020·Luminescence : the Journal of Biological and Chemical Luminescence·Erzsébet Szabó-BárdosOttó Horváth

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Citations

Apr 4, 2021·Nanomaterials·José M Doña-Rodríguez, Elisenda Pulido Melián

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Methods Mentioned

BETA
X-ray
scanning electron microscopy
transmission electron microscopy
surface plasmon resonance

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