2D spinodal phase-separated TiO2 films prepared by sol–gel process and photocatalytic activity

The ZnO/TiO2 composite films were deposited over glass using spin coating technique by sol-gel process. Single-walled carbon nanotubes (SWNTs) were used to modify the ZnO/TiO2 films successfully in this paper. The structure and composition of the ZnO/TiO2 composite and SWNTs doped ZnO/TiO2 composite were characterized by X-ray diffraction (XRD). The morphology of samples was characterized by scanning electron microscopy (SEM). The photocatalytic activity was investigated by photocatalytic degradation of aqueous methyl orange under ultraviolet (UV) radiation. The UV-vis absorption spectra of the ZnO/TiO2 films and SWNTs doped ZnO/TiO2 films in the wavelength region 200~800 nm were obtained. The results indicate that the SWNTs addition can decrease the grain size of ZnO/TiO2, which can enhance the photocatalytic activity. UV-vis absorption spectra of SWNTs-ZnO/TiO2 showed obvious blue shifts compared with ZnO/TiO2. The optimal amount of doping SWNTs is 1% according to this research. The enhanced mechanism of the SWNTs for the photocatalytic activity in ZnO/TiO2 films was analyzed in this article.

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Alternate coating and porosity as dependent factors for the photocatalytic activity of sol–gel derived TiO2 films

Chemical Engineering Journal ◽

10.1016/j.cej.2011.08.074 ◽

2011 ◽

Vol 174 (1) ◽

pp. 190-198 ◽

Cited By ~ 23

Author(s):

Suhas R. Patil ◽

B.H. Hameed ◽

Andrijana Sever Škapin ◽

Urška Lavrenčič Štangar

Keyword(s):

Photocatalytic Activity ◽

Sol Gel ◽

Tio2 Films

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Experimental Research on Degradation of Azo Dye Wasterwater by Photocatalysis of Nano-TiO2 Doped with Ce / Fe

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.295-298.331 ◽

2013 ◽

Vol 295-298 ◽

pp. 331-334 ◽

Cited By ~ 2

Author(s):

Hong Jiao Song ◽

Lei Zhu ◽

Xun Wang

Keyword(s):

Photocatalytic Activity ◽

Experimental Research ◽

Azo Dye ◽

Sol Gel ◽

Dye Wastewater ◽

Photogenerated Electrons ◽

Sol Gel Process ◽

Degradation Of Azo Dye

The sol-gel process is applied to respectively prepare nano-TiO2films with Ce (cerium) or nano-TiO2films with Fe (ferium), which are used to degradate azo dye wastewater and present their characterization by XRD and HRTEM methods. The results show that proper amount of Ce or Fe doped into the nano-TiO2films can effectively accelerate the separation of photogenerated electrons-holes and easily form lattices, and consequently promotes nano-TiO2films' photocatalytic activity by nearly 20%.

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Photocatalytically Active Cotton Fabrics Produced with Anatase Synthesized Using a Low-Temperature Sol-Gel Process

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.762.408 ◽

2018 ◽

Vol 762 ◽

pp. 408-412

Author(s):

Raivis Eglītis ◽

Gundars Mežinskis

Keyword(s):

Photocatalytic Activity ◽

Uv Light ◽

Sol Gel ◽

Average Particle Size ◽

Synthesis Method ◽

Average Particle ◽

X Ray Diffraction ◽

Sol Gel Process ◽

Anatase Nanoparticles ◽

Pre Treatment

In this work two different hydrosols were used to impregnate a commercially available cotton fabric with anatase nanoparticles to give it photocatalytic activity. To increase the activity, different pre-treatment methods were applied. The nanoparticle size was determined using dynamic light scattering and x-ray diffraction and the fabrics were examined using scanning electron microscopy. Photocatalytic activity was measured using the degradation of methyl-orange while irradiating the samples with UV light. The synthesis method allowed to produce anatase with an average particle size of 32 to 37 nm depending on the synthesis method used.

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