Photocatalytic hydrogen evolution from CdS–ZnO–CdO systems under visible light irradiation: Effect of thermal treatment and presence of Pt and Ru cocatalysts

Navarro, R.M.; Valle, F. del; Fierro, J.L.G.

doi:10.1016/j.ijhydene.2008.05.048

Cited by 145 publications

(68 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The photocatalytic activity of the semiconductors can be significantly improved by applying co-catalysts [12][13][14][15]. The H 2 formation in the methanol photocatalytic reforming reaction increases several orders of magnitude if co-catalysts have been introduced onto the surface of the semiconductor [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…Commonly used techniques include in situ photodeposition [5,12,22] and deposition of pre-prepared metal colloids [23][24][25][26]. An easy and effective way for preparing co-catalysts is impregnation with the appropriate metal salt followed by calcination.…”

Section: Introductionmentioning

confidence: 99%

“…A series of metal oxide co-catalysts (such as NiO x , RuO 2 , RhO x , and PtO x ) can be built on the surface of Ga-Zn-oxynitrides by means of this method [27]. RuO 2 can also be loaded via impregnation by tetrahydrofuran solution of Ru 3 (CO) 12 followed by drying and calcination [9]. Calcination of the Ga-Zn-oxynitride support itself is preferred because the treatment eliminates the traces of metallic Zn, which are potential recombination centers [28].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural evolution in Pt/Ga-Zn-oxynitride catalysts for photocatalytic reforming of methanol

Vass

Pászti

Bálint

et al. 2016

Materials Research Bulletin

View full text Add to dashboard Cite

Products of microwave-assisted urea-induced co-precipitation of Ga(NO 3 ) 3 and Zn(NO 3 ) 2 or Ga 2 O 3 and ZnO were nitridated in order to obtain Ga-Zn-based photocatalysts. Irrespectively to the starting material, wurtzite-like Ga-Zn-oxynitride phases formed. The preparation was completed by deposition of a Pt co-catalyst, which was activated by either reduction in hydrogen or calcination in air. It was demonstrated by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) that during oxidative activation the oxynitride started to transform into a nitrogen-free Zn-containing Gaoxyhydroxide. Regardless to the structure of the catalysts after the activation step, almost complete oxynitride to oxyhydroxide transformation was observed during the methanol photocatalytic reforming reaction, accompanied by complete reduction of the Pt co-catalyst to metallic state. The observations of this study point to the importance of phase transitions under reaction conditions in the development of the active ensemble in the Ga,Zn-based photocatalysts.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural evolution in Pt/Ga-Zn-oxynitride catalysts for photocatalytic reforming of methanol

Vass

Pászti

Bálint

et al. 2016

Materials Research Bulletin

View full text Add to dashboard Cite

show abstract

“…14) Among various semiconductors employed, titanium dioxide (TiO 2 ) is well known to be an excellent photocatalyst because of its high transparency in visible light, good photocatalytic behavior and favorable chemical stability. 5,6) Zinc oxide, as a direct wide-band-gap semiconductor with a band gap of 3.37 eV and a large exciton binding energy of 60 meV at room temperature, is discovered to be important semiconductor photocatalysis in recent years.…”

Section: Introductionmentioning

confidence: 99%

Structure and Photocatalysis of TiO<sub>2</sub>/ZnO Double-Layer Film Prepared by Pulsed Laser Deposition

et al. 2012

View full text Add to dashboard Cite

Nanocrystalline double-layer film of TiO 2 /ZnO was prepared by pulsed laser deposition on quartz substrate and their microstructure, optical property and photocatalysis were investigated. The first/bottom ZnO layer grew on its [001] direction of the wurtzite structure, while the second/top TiO 2 layer consisted of nanorods grown on the [001] direction of its anatase structure. The TiO 2 /ZnO film showed improved photoabsorption in visible light in the UVvisible absorption spectrum; and showed weaken UV emission and enhanced deep level emission in the photoluminescence spectrum. By the degradation of methyl orange and methylene blue, the TiO 2 /ZnO film exhibited evident enhanced photodegradation efficiency in a wide wavelength range. That can be explained by the enhanced wavelength response in visible range, more effective use of irradiation light and the retarded recombination of electronhole pairs in the double layer films.

show abstract

“…UV-Visible spectra of the photocatalysts were obtained using a Cary 5000 spectrophometer. The Band Gap was obtained from UV-visible spectra [26].…”

Section: Preparation Of the Photocatalystsmentioning

confidence: 99%

Photocatalytic Degradation of Trichloroethylene Over Silver Nanoparticles Supported on Tio2

Maldonado¹,

Fierro

Coronado

et al. 2010

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

The photocatalytic degradation of trichloroethylene over Ag nanoparticles supported on TiO 2 was studied. The photocatalysts were obtained by impregnation of Ag colloids on TiO 2 . They were characterized by XPS, TEM and UV-vis. Ag 0 nanoparticles were obtained with diameters between 2.0-3.2 nm. The photocatalysts were found to display band gap energies similar to those of pure TiO 2 , although the presence of Ag nanoparticles results in the formation of a plasmon resonance band in the visible range. The photocatalytic activity of the Ag/TiO 2 samples to remove trichlorethylene (TCE) in gas phase was tested. With visible light, up to 60% of conversion was obtained.

show abstract

Photocatalytic hydrogen evolution from CdS–ZnO–CdO systems under visible light irradiation: Effect of thermal treatment and presence of Pt and Ru cocatalysts

Cited by 145 publications

References 36 publications

Structural evolution in Pt/Ga-Zn-oxynitride catalysts for photocatalytic reforming of methanol

Structural evolution in Pt/Ga-Zn-oxynitride catalysts for photocatalytic reforming of methanol

Structure and Photocatalysis of TiO<sub>2</sub>/ZnO Double-Layer Film Prepared by Pulsed Laser Deposition

Photocatalytic Degradation of Trichloroethylene Over Silver Nanoparticles Supported on Tio2

Contact Info

Product

Resources

About