Preparation of Transparent Particulate MoO3/TiO2 and WO3/TiO2 Films and Their Photocatalytic Properties

Song, Kwonsik; Park, Myun Kyu; Kwon, Young Tae; Lee, Hyun Woo; Chung, and Won Jo; Lee, Wan In

doi:10.1021/cm000858n

Cited by 241 publications

(100 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…There has been much interest in coupling different semiconductor particles with TiO 2 , with coupled samples such as TiO 2 -CdS, Bi 2 S 3 -TiO 2 , TiO 2 -WO 3 , TiO 2 -SnO 2, TiO 2 -MoO 3, and TiO 2 -Fe 2 O 3 being reported [111][112][113][114][115][116][117][118]. The coupled structure that has received the most attention is that consisting of CdS and TiO 2 colloidal particles.…”

Section: Coupled/composite Tiomentioning

confidence: 99%

“…WO 3 can be excited by illumination with visible light and the photogenerated holes can transfer from WO 3 to TiO 2 . Song et al [115] observed that loading of WO 3 on the TiO 2 surface improved the decomposition of 1,4-dichlorobenzene in aqueous solution by up to 5.9 times compared with pure TiO 2 . Because the standard reduction potential between W(VI) and W(V) is only -0.03 V, it was deduced that electrons in the conduction band of TiO 2 could be easily accepted by WO 3 .…”

Section: Coupled/composite Tiomentioning

confidence: 99%

See 1 more Smart Citation

A review of TiO2 nanoparticles

2011

View full text Add to dashboard Cite

Climate change and the consumption of non-renewable resources are considered as the greatest problems facing humankind. Because of this, photocatalysis research has been rapidly expanding. TiO 2 nanoparticles have been extensively investigated for photocatalytic applications including the decomposition of organic compounds and production of H 2 as a fuel using solar energy. This article reviews the structure and electronic properties of TiO 2 , compares TiO 2 with other common semiconductors used for photocatalytic applications and clarifies the advantages of using TiO 2 nanoparticles. TiO 2 is considered close to an ideal semiconductor for photocatalysis but possesses certain limitations such as poor absorption of visible radiation and rapid recombination of photogenerated electron/hole pairs. In this review article, various methods used to enhance the photocatalytic characteristics of TiO 2 including dye sensitization, doping, coupling and capping are discussed. Environmental and energy applications of TiO 2 , including photocatalytic treatment of wastewater, pesticide degradation and water splitting to produce hydrogen have been summarized. Historical backgroundThe growth of industry worldwide has tremendously increased the generation and accumulation of waste byproducts. In general, the production of useful products has been focused on and the generation of waste byproducts has been largely ignored. This has caused severe environmental problems that have become a major concern. Researchers all over the world have been working on various approaches to address this issue. Photoinduced processes have been studied and various applications have been developed. One important technique for removing industrial waste is the use of light energy (electromagnetic radiation) and particles sensitive to this energy to mineralize waste which aids in its removal from solution. Titanium dioxide (TiO 2 ) is considered very close to an ideal semiconductor for photocatalysis because of its high stability, low cost and safety toward both humans and the environment.*Corresponding author (email: shipra.mital@gmail.com)In 1964, Kato et al.[1] published their work on the photocatalytic oxidation of tetralin (1,2,3,4-tetrahydronaphthalene) by a TiO 2 suspension, which was followed by McLintock et al. [2] investigating the photocatalytic oxidation of ethylene and propylene in the presence of oxygen adsorbed on TiO 2 . However, the most important discovery that extensively promoted the field of photocatalysis was the "Honda-Fujishima Effect" first described by Fujishima and Honda in 1972 [3]. This well-known chemical phenomenon involves electrolysis of water, which is related to photocatalysis. Photoirradiation of a TiO 2 (rutile) single crystal electrode immersed in an aqueous electrolyte solution induced the evolution of oxygen from the TiO 2 electrode and the evolution of hydrogen from a platinum counterelectrode when an anodic bias was applied to the TiO 2 working electrode. In 1977, Frank and Bard [4] examined the reduction of ...

show abstract

Section: Coupled/composite Tiomentioning

confidence: 99%

Section: Coupled/composite Tiomentioning

confidence: 99%

A review of TiO2 nanoparticles

2011

View full text Add to dashboard Cite

show abstract

“…Further, the strong oxidizing power of the photogenerated holes, the chemical inertness, and the non-toxicity of TiO 2 has also made it a superior photocatalyst [4]. Titania has a large band gap (3.20 ev for anatase TiO 2 ) and therefore, only a small fraction of solar light can be absorbed [5]. Many attempts have been made to sensitize titanium dioxide to the whole visible region, such as doping with transition metals [6][7], transition metal ions [8], nonmetal atoms [9] and organic materials [10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Application of Cu-TiO2 Nanaocomposites in Photodegradation of Methyl Red (MR)

Kumar¹,

Hitkari²,

Gautam³

et al. 2015

International Advanced Research Journal in Science, Engineering

View full text Add to dashboard Cite

TiO 2 is used as photo catalyst because of its high oxidation power, stability and non toxicity.Cu-TiO 2 nanocomposites was prepared by a adopting the solution impregnation method. After characterization for crystalline phase and particle size by XRD analysis, SEM analysis was carried out to seen morphology of samples, Surface area of TiO 2 and Cu-TiO 2 were analysed by BET. Both the prepared TiO 2 and synthesized Cu-TiO 2 nanocomposites were used as photo catalyst in the photo-degradation of methyl red. The Photo-degradation of methyl red in the presence of pure TiO 2 and synthesized Cu-TiO 2 was done. The Photo-degradation of methyl red were investigated at different condition of temperature, concentration and pH. The effective photo-degradation was found in case of methyl red in the presence of Cu-TiO 2 as compared to pure TiO 2 at different conditions. Photo-degradation of methyl is following the pseudo first order kinetics.

show abstract

“…Electron injection into the bulk WO 3 layer was invoked as a mechanism for reduced surface carrier recombination in the TiO 2 component in these composites [17]. The photocatalytic activity of WO 3 -TiO 2 films was found to be three times higher than that of pure TiO 2 films for the gas-phase oxidation of 2-propanol [18]. A TiO 2 coating was coupled with a WO 3 ''electron pool'' in the design of a photoelectrochemical anticorrosion system with built-in energy storage capability [19].…”

Section: Introductionmentioning

confidence: 99%

Erratum to: Sol–gel synthesis of mesoporous WO3–TiO2 composite thin films for photochromic devices

Djaoued

Balaji

Beaudoin

2013

J Sol-Gel Sci Technol

View full text Add to dashboard Cite

Mesoporous WO 3 -TiO 2 composite films were prepared by a sol gel based two stage dip coating method and subsequent annealing at 450, 500 and 600°C. An organically modified silicate based templating strategy was adopted in order to obtain a mesoporous structure. The composite films were prepared on ITO coated glass substrates. The porosity, morphology, and microstructures of the resultant products were characterized by scanning electron microscopy, N 2 adsorption-desorption measurements, l-Raman spectroscopy and X-ray diffraction. Calcination of the films at 450, and 500°C resulted in mixed hexagonal (h) plus monoclinic phases, and pure monoclinic (m) phase of WO 3 , respectively. The degree of crystallization of TiO 2 present in these composite films was not evident. The composite films annealed at 600°C, however, consist of orthorhombic (o) WO 3 and anatase TiO 2 . It was found that the o-WO 3 phase was stabilized by nanocrystalline anatase TiO 2 . The thus obtained mesoporous WO 3 -TiO 2 composite films were dye sensitized and applied for the construction of photochromic devices. The device constructed using dye sensitized WO 3 -TiO 2 composite layer heat treated at 600°C showed an optical modulation of 51 % in the NIR region, whereas the devices based on the composite layers heat treated at 450, and 500°C showed only a moderate optical modulation of 24.9, and 38 %, respectively. This remarkable difference in the transmittance response is attributed to nanocrystalline anatase TiO 2 embedded in the orthorhombic WO 3 matrix of the WO 3 -TiO 2 composite layer annealed at 600°C.

show abstract

Preparation of Transparent Particulate MoO₃/TiO₂ and WO₃/TiO₂ Films and Their Photocatalytic Properties

Cited by 241 publications

References 22 publications

A review of TiO2 nanoparticles

A review of TiO2 nanoparticles

Synthesis, Characterization and Application of Cu-TiO2 Nanaocomposites in Photodegradation of Methyl Red (MR)

Erratum to: Sol–gel synthesis of mesoporous WO3–TiO2 composite thin films for photochromic devices

Contact Info

Product

Resources

About