Synergistic effect between TiO2 sol–gel and Degussa P25 in dye photodegradation View Full Text


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Article Info

DATE

2013-04-16

AUTHORS

Luminita Andronic, Dana Perniu, Anca Duta

ABSTRACT

The TiO2 powders were synthesized by versatile and low cost sol–gel process using HNO3 and titanium tetra-isopropoxide (volumetric ratio of 4:1) following by the hydrolysis reaction. The powders show the two polymorphs of TiO2: 96 % anatase and 4 % brookite, due to acidic condition (pH = 3). Thin films of titanium oxide were obtained by dip-coating, using the sol–gel of titanium oxide mixed with commercial Degussa P25 into a weight ratio 1:1 or 1:1.5, to enhance the synergistic effect of anatase/rutile ratio aiming at increasing the efficiency of the TiO2 photocatalyst in dyes degradation. The thin film surface (charge and morphology) was controlled by polymer (poly-ethylene glycol) and surfactant (Sodium dodecyl sulphate, Triton X100) addition. The titanium oxide was characterized by particle size analyzer, contact angle measurements, X-ray diffraction, scanning electron microscopy, and atomic force microscopy. The photocatalytic properties of powders and coatings were evaluated based on the degradation efficiency of two reference dyes (methyl orange and methylene blue). The results outline that poly(ethylene glycol) and films morphologies are the most influential factors that affecting the photocatalytic activity. More... »

PAGES

472-480

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10971-013-3034-5

DOI

http://dx.doi.org/10.1007/s10971-013-3034-5

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1022320915


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