Structural characterization of Bi2−xSbxS3 films prepared by the dip-dry method

Nayak, B.B.; Acharya, H. N.; Mitra, G. B.; Mathur, B. K.

doi:10.1016/0040-6090(83)90326-7

Cited by 89 publications

(57 citation statements)

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“…The conduction band of Bi 2 S 3 nanoparticles is less anodic than the conduction band of TiO 2 and the valence band is more cathodic than the valence band of TiO 2 [113], enhancing electron injection from the excited state of Bi 2 S 3 into TiO 2 . Bessekhouad et al [114] studied a Bi 2 S 3 /TiO 2 junction prepared by precipitation of different concentrations of Bi 2 S 3 onto TiO 2 .…”

Section: Coupled/composite Tiomentioning

confidence: 99%

“…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%

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A review of TiO2 nanoparticles

2011

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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 ...

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Section: Coupled/composite Tiomentioning

confidence: 99%

Section: Coupled/composite Tiomentioning

confidence: 99%

A review of TiO2 nanoparticles

2011

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“…[24,25] Bi 2 S 3 , which is an important n-type semiconductor with a narrow band gap range from 1.3 to 1.7 eV, [26,27] has been widely investigated in visible-light photocatalysis, thermoelectricity, and photodiode arrays. [28][29][30] Its good conductivity and relatively easy synthetic process further extend its application to photodetectors and solar cells. [31,32] Previously, Bi 2 S 3 nanorod photodetectors with a photoconductive gain of 1.1 and solution-processed Bi 2 S 3 nanocrystalline photodetectors with a photoconductive gain of 10 and a temporal response of 10 ms have been reported.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electrical Contact on the Performance of Bi₂S₃ Single Nanowire Photodetectors

Yang

Huo

et al. 2014

ChemPhysChem

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Bi2S3 single-crystalline nanowires are synthesized through a hydrothermal method and then fabricated into single nanowire photodetectors. Due to the different contact barrier between the gold electrode and Bi2S3 nanowires, two kinds of devices with different electrical contacts are obtained and their photoresponsive properties are investigated. The non-ohmic contact devices show larger photocurrent gains and shorter response times than those of ohmic contact devices. Furthermore, the influence of a focused laser on the barrier height between gold and Bi2S3 is explored in both kinds of devices and shows that laser illumination on the Au-Bi2S3 interface can greatly affect the barrier height in non-ohmic contact devices, while keeping it intact in ohmic contact devices. A model based on the surface photovoltage effect is used to explain this phenomenon.

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“…Such ideal combination of properties of this material makes it one of the suitable semiconducting materials for photovoltaic applications as discussed by the Shockley and Queisser in respect of p-n homojunction solar cells (Shockley and Queisser 1961;Cademartiri et al 2008;Yousefi et al 2012). Also, the relative positions of the conduction band energy levels of nanostructured Bi 2 S 3 and TiO 2 , a widely used semiconductor oxide as a photoanode in solar cell applications , display favorable energetics for electron transformer from the former to the latter (Nayak et al 1983).…”

Section: Introductionmentioning

confidence: 99%

“…The excitons so generated get dissociated at the TiO 2 -Bi 2 S 3 interface due to the favorable interfacial band energetic (see Fig. 5a) leading to effective electron injection from excited Bi 2 S 3 to the conduction band of TiO 2 (Nayak et al 1983). This further results in improved photocurrent (J) in C-30 and so doubling of J sc .…”

Section: Photovoltaic Characterizationmentioning

confidence: 99%

TiO2 photoanode sensitized with nanocrystalline Bi2S3: the effect of sensitization time and annealing on its photovoltaic performance

Kulkarni¹,

Prasad

Pathan

et al. 2015

Appl Nanosci

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This work deals with the sensitization of the porous TiO 2 films of thickness about 4 lm deposited on fluorine-doped tin oxide with nanocrystalline Bi 2 S 3 for photovoltaic application. The sensitization was achieved for four different sensitization times employing chemical solution deposition with bismuth nitrate and sodium thiosulphate as precursors for Bi 3? and S 2-, respectively. The unsensitized and sensitized photoelectrodes were characterized using X-ray diffractometry, scanning electron microscopy and diffused reflectance spectroscopy. XRD patterns show the signatures of both anatase TiO 2 and orthorhombic Bi 2 S 3 in the sensitized photoanodes. However, crystallinity of Bi 2 S 3 increased with increase in sensitization time from 10 to 40 min. The temporal effect of sensitization and annealing on the photovoltaic performance of the solar cells fabricated using four different photoelectrodes was studied using the photocurrent density versus photovoltage curves. Annealing apparently improved the photovoltaic performance of photoanodes. The best performance was obtained for cell fabricated using annealed TiO 2 /Bi 2 S 3 photoanode after 30 min sensitization time showing V oc * 0.37 mV, J sc * 0.52 mA/cm 2 , FF * 68 and 0.43 %.

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Structural characterization of Bi2−xSbxS3 films prepared by the dip-dry method

Cited by 89 publications

References 10 publications

A review of TiO2 nanoparticles

A review of TiO2 nanoparticles

Effect of Electrical Contact on the Performance of Bi₂S₃ Single Nanowire Photodetectors

TiO2 photoanode sensitized with nanocrystalline Bi2S3: the effect of sensitization time and annealing on its photovoltaic performance

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Structural characterization of Bi2−xSbxS3 films prepared by the dip-dry method

Cited by 89 publications

References 10 publications

A review of TiO2 nanoparticles

A review of TiO2 nanoparticles

Effect of Electrical Contact on the Performance of Bi2S3 Single Nanowire Photodetectors

TiO2 photoanode sensitized with nanocrystalline Bi2S3: the effect of sensitization time and annealing on its photovoltaic performance

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Product

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Effect of Electrical Contact on the Performance of Bi₂S₃ Single Nanowire Photodetectors