Vanadia–titania thin films for photocatalytic degradation of formaldehyde in sunlight

Akbarzadeh, Rokhsareh; Umbarkar, Shubhangi B.; Sonawane, Ravindra S.; Takle, Srikant; Dongare, Mohan K.

doi:10.1016/j.apcata.2009.11.035

Cited by 97 publications

(38 citation statements)

References 25 publications

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“…This suggests that the film thickness is dependent on the solution viscosity. These results concur with the work of Menaa et al [22], Negishi and Takeuchi [23], and Akbarzadeh et al [24] as they observed that, as the viscosity of the solution increased, the film thickness also increased. As expected, as the solution viscosity increased from 19.02 cP to 59.01 cP, the thickness also increases from 1.6 μm (1600 nm) to 4.0 μm (4000 nm).…”

Section: Viscosity and Filmsupporting

confidence: 83%

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TiO₂ Transparent Thin Film for Eliminating Toluene

Ibrahim

Negishi

Masrom

et al. 2012

ISRN Nanotechnology

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TiO 2 nanoparticles undergo a single-phase transition: from amorphous to anatase when calcined at 450• C. It can be noticed from the XRD and AFM results that the particle size of TiO 2 is below 30 nm. Results from viscometer and UV-Vis analysis showed that the film thickness is closely related to the viscosity of dip-coating solutions. It was found that the contact angle for water decreased after being illuminated with UV light at certain periods of time. This indicates that these films exhibit hydrophilic properties that can be used on self-cleaning surfaces and antifogging mirrors. Heterogeneous photocatalytic oxidation allows the oxidation of airborne volatile organic compounds (VOCs) into carbon dioxide and water in the presence of a semiconductor catalyst and UV light source. Titanium dioxide, due to its chemical stability, nontoxicity, and low cost, represents one of the most efficient photocatalysts. Photocatalytic activity of the TiO 2 thin films was evaluated by using toluene and results showed that this film is successful in decomposing toluene.

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Section: Viscosity and Filmsupporting

confidence: 83%

“…The water contact angle for films were measured following the Japanese Industrial Standard method (JIS R-1703-1) [24]. Results are shown in Figure 5 and tabulated in Table 1.…”

Section: Water Contact Anglementioning

confidence: 99%

TiO₂ Transparent Thin Film for Eliminating Toluene

Ibrahim

Negishi

Masrom

et al. 2012

ISRN Nanotechnology

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“…Furthermore, a kinetic study of paracetamol degradation in water by photocatalysis was developed finding that the paracetamol degradation curves exhibit a mono-exponential trend, suggesting that a pseudo-first order reaction model can be applied to describe the kinetic behaviour [6,23,24,[27][28][29] obtained from the TiO2 active phase acting as photocatalyst in the heterogeneous photocatalytic treatment. Pseudo-first order kinetics with respect to paracetamol concentration (C) may be expressed as:…”

Section: Resultsmentioning

confidence: 99%

Supported Photocatalyst for Removal of Emerging Contaminants from Wastewater in a Continuous Packed-Bed Photoreactor Configuration

et al. 2015

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Water pollution from emerging contaminants (ECs) or emerging pollutants is an important environmental problem. Heterogeneous photocatalytic treatment, as advanced oxidation treatment of wastewater effluents, has been proposed to solve this problem. In this paper, a heterogeneous photocatalytic process was studied for emergent contaminants removal using paracetamol as a model contaminant molecule. TiO2 photocatalytic activity was evaluated using two photocatalytic reactor configurations: Photocatalyst solid suspension in wastewater in a stirred photoreactor and TiO2 supported on glass spheres (TGS) configuring a packed bed photoreactor. The surface morphology and texture of the TGS were monitored by scanning electron microscope (SEM). The influence of photocatalyst amount and wastewater pH were evaluated in the stirred photoreactor and the influence of wastewater flowrate was tested in the packed bed photoreactor, in order to obtain the optimal operation conditions. Moreover, results obtained were compared with those obtained from photolysis and adsorption studies, using the optimal operation conditions. Good photocatalytic activities have been observed and leads to the conclusion that the heterogeneous photocatalytic system in a packed bed is an effective method for removal of emerging pollutants. OPEN ACCESSCatalysts 2015, 5 78

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“…TiO 2 powders could be employed in solar and UV irradiation systems (photoreactors) because this semiconductor has a high transparency to visible light, high refractive index, and low absorption coefficient. Wide range of metal oxides and sulfides have been used as photocatalysts including ZnO (Daneshvar et al, 2004;Sakthivel et al, 2003;Kormann et al, 1988;Khodj et al, 2001;Gouvêa et al, 2000;Lizama et al, 2002;Kansal et al, 2007;Chakrabarti and Dutta, 2004), WO 3 (Waldner et al, 2007;Sayama et al, 2010;Saepurahmanet et al, 2010;Cao et al, 2011), WS 2 (Jing and Guo, 2007), Fe 2 O 3 (Chen et al, 2001;Bandara et al, 2001;Pal and Sharon, 1998), V 2 O 5 (Akbarzadeh et al, 2010;Teramura et al, 2004a,b), CeO 2 (Lin and Yu, 1998;Coronado et al, 2002;Ji et al, 2009;Song et al, 2007), CdS (Bessekhouad et al, 2004;Reuterġardh and Langphasuk, 1997;Tang and Huang, 1995), ZnS (Torres-Martínez et al, 2001), and CuO (Lim and Kim, 2004;Sathishkumar et al, 2011;Nezamzadeh-Ejheieg and Hushmandrad, 2010). The light intensity in homogeneous and heterogeneous photoreactors determines the LVREA which is proportional to the rate of photochemical reaction.…”

Section: Principles Of Photocatalysismentioning

confidence: 99%