UV–vis versus visible degradation of Acid Orange II in a coupled CdS/TiO2 semiconductors suspension

Bessekhouad, Y.; Chaoui, N.; Trzpit, Mickaël; Ghazzal, Mohamed Nawfal; Robert, Didier; Weber, J.V.

doi:10.1016/j.jphotochem.2006.03.025

Cited by 200 publications

(115 citation statements)

References 10 publications

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“…The shape of the curve of nanocomposites indicates fundamental absorption edges of both components: TiO 2 and CdS. A similar spectral dependence was observed by Y. Bessekhouad et al [3] for the CdS/TiO 2 coupled system prepared by means of the sol-gel method, via the precipitation of TiO 2 on CdS. Based on the reflectance spectra presented in Fig.…”

Section: Resultssupporting

confidence: 81%

“…These improved photocatalytic properties of the coupled semiconductors are related to efficient charge transport between TiO 2 and CdS as well as the morphology of the particles, and shape, size and surface contact between particles [3,5]. CdS particles loaded on TiO 2 can act as the separation centres of photoinduced charges, electrons and holes.…”

Section: Resultsmentioning

confidence: 99%

“…Differences in the electronic structure of nanocomposites based on metal oxides/sulphides have a profound influence on photocatalytic properties. The mixture of semiconductors based on TiO 2 /CdS has attracted attention because of their potential applications in the photodegradation of organic pollutants [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], the photoelectrolysis of water for hydrogen production [17][18][19][20], and the sensitization of solar cells [21,22]. Due to its wide band gap (3.0 for rutile and 3.2 eV for anatase), TiO 2 is able to absorb light in the UV range, which constitutes 3-5% of solar irradiation, while semiconductors with a narrower band gap, such as CdS, are effective under visible light.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, certain types of TiO 2 template can protect CdS from photodegradation [3]. Usually, application of cadmium sulfide is limited due to its photocorrosion by the photogenerated holes [6].…”

Section: Introductionmentioning

confidence: 99%

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Photosensitization of TiO2 P25 with CdS Nanoparticles for Photocatalytic Applications

Trenczek-Zając¹,

Banaś²,

Świerczek³

et al. 2017

Archives of Metallurgy and Materials

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A TiO 2 /CdS coupled system was prepared by mixing the TiO 2 P25 with CdS synthesized by means of the precipitation method. It was found that the specific surface area (SSA) of both components is extremely different and equals 49.5 for TiO 2 and 145.4 m 2 ·g -1 for CdS. The comparison of particle size distribution and images obtained by means of transmission electron microscopy (TEM) showed agglomeration of nanocomposites. X-ray diffraction (XRD) patterns suggest that CdS crystallizes in a mixture of cubic and hexagonal phases. Optical reflectance spectra revealed a gradual shift of the fundamental absorption edge towards longer wavelengths with increasing CdS molar fraction, which indicates an extension of the absorption spectrum of TiO 2 . The photocatalytic activity in UV and UV-vis was tested with the use of methyl orange (MO). The Langmuir-Hinshelwood model described well the photodegradation process of MO. The results showed that the photocatalytic behaviour of the TiO 2 /CdS mixture is significantly better than that of pure nanopowders.

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Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photosensitization of TiO2 P25 with CdS Nanoparticles for Photocatalytic Applications

Trenczek-Zając¹,

Banaś²,

Świerczek³

et al. 2017

Archives of Metallurgy and Materials

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“…Recently, numerous studies have been conducted to improve the photocatalytic efficiency and visible light utilization of TiO 2 , which include sensitization [4,5], impurity doping [6,7] and coupling with other semiconductors [8,9]. Among the elements doped, nitrogen has been proved as the most promising candidate for its comparable ionic radius, which is close to that of O, so that N 2p states may effectively merge with O 2p states [1].…”

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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Photocatalytic Formation of Composite Electrodes for Semiconductor‐Sensitized Solar Cells

Stroyuk

Kozytskiy

Kuchmiy

2018

Photoelectrochemical Solar Cells

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UV–vis versus visible degradation of Acid Orange II in a coupled CdS/TiO2 semiconductors suspension

Cited by 200 publications

References 10 publications

Photosensitization of TiO2 P25 with CdS Nanoparticles for Photocatalytic Applications

Photosensitization of TiO2 P25 with CdS Nanoparticles for Photocatalytic Applications

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

Photocatalytic Formation of Composite Electrodes for Semiconductor‐Sensitized Solar Cells

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