Improved photocatalytic activity of Sn4+ doped TiO2 nanoparticulate films prepared by plasma-enhanced chemical vapor deposition

Cao, Yaán; Yang, Wensheng; Zhang, Weifeng; Liu, Guozong; Yue, Po Lock

doi:10.1039/b306845e

Cited by 223 publications

(152 citation statements)

References 21 publications

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“…The chemical state of the diffused SnO 2 and the effect on the performance of the cell needs further attention because of its unknown effect to the overall performance of DSSCs. These effects may not necessarily be negative, as reported in literature the photocatalytic activity of TiO 2 has been increased when using semiconductor coupled systems like SnO 2 /TiO 2 , [16][17][18] in particular doping the anatase lattice with Sn cations enhances the separation of photogenerated pairs. 19 Obviously, as reported in literature, higher sintering temperatures cause an excellent removal of organic binders and solvents.…”

Section: Discussionmentioning

confidence: 76%

A spatially resolved study on the Sn diffusion during the sintering process in the active layer of dye sensitised solar cells

Andrei

O’Reilly

Zerulla

2010

Phys. Chem. Chem. Phys.

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Dye sensitised solar cells (DSSCs) use a mesoporous TiO 2 scaffold, typically assisted by an adsorbed dye, as the main active element, responsible for the photon absorption, exciton generation and charge separation functionality. The sintering process employed in the TiO 2 active layer fabrication plays a crucial role in the formation of the nanoparticle scaffold and hence the performance of a dye sensitised solar cell, as it allows the particles to form efficient inter-crystalline electric contacts to provide high electron conductivity. The sintering temperature, with typical values in the range of 450-600 °C, is of particular importance for the formation as it reduces the amount of unwanted organics between the individual crystallites and determines the formation of interfaces between the nanoparticles. Furthermore, the cell design requires a conductive transparent top electrode which is typically made of fluorinated tin oxide or indium tin oxide. Here we report on a highly spatially resolved scanning electron microscopy study including focussed ion beam (FIB) milling and energy dispersive X-ray (EDX) mapping of the distribution of all relevant elements within a DSSC subsequent to a classical sintering process. We find that the above quoted temperatures cause the Sn of the transparent conductive oxide (TCO) to migrate into the TiO 2 scaffold, resulting in unwanted alterations in the composition of the complex scaffold which has a direct effect on the DSSC performance. One potential solution to this problem is the invention of novel concepts in the manufacturing of DSSCs using lower sintering temperatures.

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Section: Discussionmentioning

confidence: 76%

A spatially resolved study on the Sn diffusion during the sintering process in the active layer of dye sensitised solar cells

Andrei

O’Reilly

Zerulla

2010

Phys. Chem. Chem. Phys.

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“…The plasma process was performed in a mixture of TiCl 4 and SnCl 4 with an appropriate molar ratio. It was found that photocatalytic activity of TiO 2 -Sn 4+ nanoparticles was much higher than those of the pure TiO 2 (Cao et al, 2004). Wide possibilities of the plasma technique also allow to produce nanoparticles of doped semiconducting organic polymers, e.g.…”

Section: Water Splitting Systemsmentioning

confidence: 99%

Cold Plasma – A Promising Tool for the Development of Electrochemical Cells

Tyczkowski¹

2012

Electrochemical Cells - New Advances in Fundamental Researches and Applications

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“…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]. Introduction of dopants allows titania to absorb in the visible region but this does not necessarily mean that the doped catalyst has a better photocatalytic activity.…”

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

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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.

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Improved photocatalytic activity of Sn4+ doped TiO2 nanoparticulate films prepared by plasma-enhanced chemical vapor deposition

Cited by 223 publications

References 21 publications

A spatially resolved study on the Sn diffusion during the sintering process in the active layer of dye sensitised solar cells

A spatially resolved study on the Sn diffusion during the sintering process in the active layer of dye sensitised solar cells

Cold Plasma – A Promising Tool for the Development of Electrochemical Cells

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

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