Synthesis and enhanced visible-light activity of N-doped TiO 2 nano-additives applied over cotton textiles

Citation data:

Journal of Materials Research and Technology, ISSN: 2238-7854, Vol: 7, Issue: 3, Page: 204-211

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Elham Katoueizadeh; Seyed Mojtaba Zebarjad; Kamal Janghorban
Elsevier BV
Materials Science
article description
To provide photocatalytic textiles, application of TiO 2 nanoparticles by surface modifications during the manufacturing process is known as a reliable choice. In this study, nitrogen-doped TiO 2 nanoparticles were synthesized by sol–gel route at two different water/triethylamine ratios and applied to the textiles which provides photocatalytic properties that unlike the conventional photocatalytic textiles, does not necessarily need UV radiations of high energy photons. N-doped TiO 2 nanoparticles were coated over textiles during the synthesizing process. Microstructure and morphology of synthesized N-doped TiO 2 nanoparticles were evaluated by XRD, PSA and SEM/EDS analysis. The results of XRD analysis indicated that the amorphous phase transformed slightly into an anatase crystallite without calcination at high temperature. The morphology confirmed that doping process had significant effect on the appearance of the synthesized nanoparticles and implied the effect of the presence of the N-doped source material on the morphology. The PSA analysis showed narrow distribution of about 15 nm for diameter of synthesized N-doped TiO 2 nanoparticles. According to UV–vis spectra, the band gap energy was measured 2.98 eV which exhibits high absorption in visible light range due to its low band gap energy. The results show that adding nitrogen increases the absorption wavelength of the N-doped TiO 2 nanoparticles and N-doped TiO 2 coated textiles shows super hydrophilic behavior examined by DSA analysis. The photodegradation of methylene blue (MB) over textiles was investigated under UV-radiation, visible light and dark conditions. Super-hydrophilicity and methylene blue photodegradation properties with the most homogenous nanoparticle distribution over textiles were achieved without utilization of UV radiation.