Characterizations and photocatalytic activity comparisons of N-doped nc-TiO2 depending on synthetic conditions and structural differences of amine sources

Nitrogen-doped TiO 2 nanoparticle photocatalysts were synthesized by a sol-gel procedure using tetra-n-butyl orthotitanate as a titanium precursor and urea as a nitrogen source. Systematic studies for the preparation parameters and their impact on the material's structure were carried out by multiple techniques: thermogravimetric and differential scanning calorimetric analysis, x-ray diffraction, scanning electron microscope, transmission electron microscopy, energy dispersive x-ray spectroscopy and UV-Vis diffuse reflectance spectrophotometry showed that the nitrogen-doped TiO 2 calcined at 500 • C for 3 h exhibited a spherical form with a particle size about 15-20 nm and crystal phase presented a mixture of 89.12% anatase. The obtained product was deposited on a porous quartz tube (D = 74 mm; l = 418 mm) to manufacture an air photocatalytic cleaner as a prototype of the TIOKRAFT company's equipment. The created air cleaner was able to remove 60% of 10 ppm acetone within 390 min and degrade 98.5% of bacteria (total aerobic bacteria and fungi, 300 cfu m −3 ) within 120 min in a 10 m 3 box. These photodegradation activities of N-TiO 2 are higher than that of the commercial nano-TiO 2 (Skyspring Inc., USA, particle size of 5-10 nm).

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“…This possibly results from the formation of isolated impurity energy levels as discussed above. This result is consistent with [30].…”

Section: Acetone Oxydation Activitysupporting

confidence: 91%

Photocatalytic equipment with nitrogen-doped titanium dioxide for air cleaning and disinfecting

Ngo

Nguyen

Dao

et al. 2014

Adv. Nat. Sci: Nanosci. Nanotechnol.

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“…Matsuzawa [21]. TiO 2 doping with non-metal anions such as C [22], F [23], I [24], S [25], B [26] and N [27] have been brought into sharper focus owing to effective enhancement of TiO 2 excitation under visible light.…”

Section: -Introductionmentioning

confidence: 99%

Synthesis and characterization of N-doped TiO 2 nanoparticles and their application in photocatalytic oxidation of dibenzothiophene under visible light

Kalantari

Kalbasi

Sohrabi

et al. 2016

Ceramics International

114

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“…Nevertheless, the large-scale commercialization of the DMFC still faces several challenges such as sluggish oxygen reduction and methanol oxidation reactions, high cost of Pt-based catalysts and methanol crossover. Among them, catalyst is one of the most important factors to influence the energy efficiency [8,9]. The anode electrocatalyst is one of the key materials for methanol oxidation and crucial for the performance of DMFC [10].…”

Section: Introductionmentioning

confidence: 99%

Direct growth of 3D flower-like Pt nanostructures by a template-free electrochemical route as an efficient electrocatalyst for methanol oxidation reaction

Ojani

Hasheminejad

Raoof

2015

Energy

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Characterizations and photocatalytic activity comparisons of N-doped nc-TiO2 depending on synthetic conditions and structural differences of amine sources

Cited by 78 publications

References 55 publications

Photocatalytic equipment with nitrogen-doped titanium dioxide for air cleaning and disinfecting

Photocatalytic equipment with nitrogen-doped titanium dioxide for air cleaning and disinfecting

Synthesis and characterization of N-doped TiO 2 nanoparticles and their application in photocatalytic oxidation of dibenzothiophene under visible light

Direct growth of 3D flower-like Pt nanostructures by a template-free electrochemical route as an efficient electrocatalyst for methanol oxidation reaction

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