Characterization and photocatalytic activity in aqueous medium of TiO2 and Ag-TiO2 coatings on quartz

Herrmann, Jean-Marie; Tahiri, Halima; Ait‐Ichou, Y.; Lassaletta, G.; González-Elipe, A.R.; Fernández, A.

doi:10.1016/s0926-3373(96)00107-5

Cited by 421 publications

(136 citation statements)

References 26 publications

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“…The concentration of chloride ion was determined by ion chromatography with a conductivity detector (Shimadzu HIC-6A). [17,18]. In addition to the characteristic peak of 101 plane, diffraction peaks corresponding to rutile titania also appeared on the pattern at 2 = 27. where I A denotes the intensity of the strongest anatase reflection, and I R is the intensity of the strongest rutile reflection.…”

Section: Methodsmentioning

confidence: 95%

Enhanced photocatalytic activity of TiO2 by doping with Ag for degradation of 2,4,6-trichlorophenol in aqueous suspension

Selvaraj

2006

Journal of Molecular Catalysis A: Chemical

190

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Section: Methodsmentioning

confidence: 95%

Enhanced photocatalytic activity of TiO2 by doping with Ag for degradation of 2,4,6-trichlorophenol in aqueous suspension

Selvaraj

2006

Journal of Molecular Catalysis A: Chemical

190

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“…Heterogeneous photocatalytic oxidation has been studied for several decades and shown to be an effective method for dealing with the environmental pollution problems, such as air cleanup, water disinfection, hazardous waste remediation, and water purification [1]- [7]. Among the many types of semiconductors, titanium dioxide (TiO 2 ) has been received lots of attention due to its high photocatalytic activity as well as the low cost and non-toxicity [8]- [14].…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide-TiO<sub>2</sub> Nanocomposite Facilitated Visible Light Photodegradation of Gaseous Toluene

Ahmadkhaniha¹,

Izadpanah²,

Rastkari³

2017

JEP

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The photocatalytic degradation of gaseous toluene was investigated on TiO 2 nanoparticles coated on reduced graphene oxide. Reduced graphene oxideTiO 2 composite (RGO-TiO 2 ) was synthesized via two step processes. The prepared RGO-TiO 2 composite was characterized using SEM, XRD, and UV-visible spectra. A significant increase in light absorption to visible light was observed by RGO-TiO 2 compared with that of pure TiO 2 nano particles. The photocatalytic degradation efficiency of the RGO-TiO 2 composite was much higher than that of the P25 TiO 2 , 95% and 40% respectively. In our investigated conditions, the initial concentration, flow rate and relative humidity had significant influences on the photocatalytic degradation of gaseous toluene. The most efficiency was recorded at the 0.3 ppm concentration, 1L/min flow rate and 30% relative humidity. We believe that this TiO 2 based composite material can be effectively used as a highly active and stable photocatalyst to remove various indoor air pollutants especially gaseous toluene. The photocatalytic degradation efficiencies of toluene increased slowly below 20% relative humidity and then decreased as the relative humidity increased further. The main reason of enhanced photocatalytic property might be the strong electron transfer ability, and the increased adsorption capacity of RGO sheets in the composites as well as the retarded charge recombination rate contributed by the energy level of the two materials. We believe that this TiO 2 based composite material can be effectively used as a highly active and stable photocatalyst to remove various gaseous pollutants.

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“…In this point, catalyst immobilization has attracted extensive attention with the expectation of easy recovery and recycling of the catalysts. In the past decades, researchers have studied immobilization of TiO 2 over various inactive supports such as zeolite, silica, ceramic and glass [15][16][17][18][19], but it was difficult to maintain high photocatalytic activity, because the specific surface area decreased after immobilization [20].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of magnetically separable N, La-doped TiO2 with enhanced photocatalytic activity

Yang

et al. 2015

Separation and Purification Technology

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a b s t r a c tA magnetically separable nitrogen and lanthanum co-doped photocatalyst c-Fe 2 O 3 @SiO 2 @N,La-TiO 2 (FST) with a typical superparamagnetic property was prepared by an effective three-step approach. Specifically, the preformed monodisperse c-Fe 2 O 3 nanoparticles were used as templates for directing the sequential deposition of SiO 2 layer by modified Stöber method and subsequent N,La-TiO 2 layer by hydrothermal method. During the hydrothermal assisted TiO 2 deposition, the interior black Fe 3 O 4 nanoparticles were converted into dark-brown c-Fe 2 O 3 nanoparticles. FST showed a ternary structure with a core of c-Fe 2 O 3 , a SiO 2 mesosphere and a N,La-TiO 2 (anatase) crust. SiO 2 layer can prevent effectively the transfer of charges from TiO 2 to c-Fe 2 O 3 , which avoids electrons and holes recombination at the interface. SiO 2 inter-layer is also a good adsorbent for dye molecules, FST showed higher photocatalytic activity than c-Fe 2 O 3 @N,La-TiO 2 (FT). FST is photoactive under both UV and visible light irradiation and can be easily separated from a slurry in photoreactor by the application of an external magnetic field.

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Characterization and photocatalytic activity in aqueous medium of TiO2 and Ag-TiO2 coatings on quartz

Cited by 421 publications

References 26 publications

Enhanced photocatalytic activity of TiO2 by doping with Ag for degradation of 2,4,6-trichlorophenol in aqueous suspension

Enhanced photocatalytic activity of TiO2 by doping with Ag for degradation of 2,4,6-trichlorophenol in aqueous suspension

Reduced Graphene Oxide-TiO<sub>2</sub> Nanocomposite Facilitated Visible Light Photodegradation of Gaseous Toluene

Synthesis of magnetically separable N, La-doped TiO2 with enhanced photocatalytic activity

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Characterization and photocatalytic activity in aqueous medium of TiO2 and Ag-TiO2 coatings on quartz

Cited by 421 publications

References 26 publications

Enhanced photocatalytic activity of TiO2 by doping with Ag for degradation of 2,4,6-trichlorophenol in aqueous suspension

Enhanced photocatalytic activity of TiO2 by doping with Ag for degradation of 2,4,6-trichlorophenol in aqueous suspension

Reduced Graphene Oxide-TiO&lt;sub&gt;2&lt;/sub&gt; Nanocomposite Facilitated Visible Light Photodegradation of Gaseous Toluene

Synthesis of magnetically separable N, La-doped TiO2 with enhanced photocatalytic activity

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Reduced Graphene Oxide-TiO<sub>2</sub> Nanocomposite Facilitated Visible Light Photodegradation of Gaseous Toluene