Are dopant-stabilized visible light-responsive photocatalysts efficient and stable?

Muruganandham, M.; Amutha, R.; Kusumoto, Yoshihumi; Sillanpää, Mika

doi:10.1039/c0cp01033b

Cited by 10 publications

(10 citation statements)

References 12 publications

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“…Although CdS has good absorption in the visible region, its photocorrosive nature limits its application in H 2 production. 39 In order to reduce photocorrosion of CdS and to prevent recombination of excitons, water containing 1M Na 2 S and 1M Na 2 SO 3 as sacrificial reagents were used. These sacrificial reagents may interact with the holes that prevent photocorrosion of CdS catalyst.…”

Section: Photocatalytic Studiesmentioning

confidence: 99%

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Combustion synthesis of cadmium sulphide nanomaterials for efficient visible light driven hydrogen production from water

et al. 2014

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Anion-doped cadmium sulphide nanomaterials have been synthesized by using combustion method at normal atmospheric conditions. Oxidant/fuel ratios have been optimized in order to obtain CdS with best characteristics. Formation of CdS and size of crystallite were identified by X-ray diffraction and confirmed by transmission electron microscopy. X-ray photoelectron spectroscopy confirmed the presence of C and N in the CdS matrix. The observed enhanced photocatalytic activity of the CdS nanomaterials for the hydrogen production from water (2120 μmol/h) can be attributed to high crystallinity, low band gap and less exciton recombination due to the C and N doping.

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Section: Photocatalytic Studiesmentioning

confidence: 99%

“…These sacrificial reagents may interact with the holes that prevent photocorrosion of CdS catalyst. 39 During the photocatalytic reaction, for every 1 h, H 2 gas was collected by using a gas tight syringe and analysed by gas chromatography. Typical chromatogram observed is shown in figure S5 (supporting information).…”

Section: Photocatalytic Studiesmentioning

confidence: 99%

Combustion synthesis of cadmium sulphide nanomaterials for efficient visible light driven hydrogen production from water

et al. 2014

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“…To quantify the impurities of carbon in the ZnS structure, elemental analysis (EA) was used and the carbon impurities were found to be 7.0 ± 0.14% (w/w) in all as-synthesized ZnS powders, which implies that the thermal decomposition at 500 ∘ C cannot remove the carbon impurities perfectly in the ZnS structure, but the residual carbon concentration is relatively low. The different morphology of 140N/ZnS can be ascribed to the production of more decomposed products, including SO 2 , CO 2 , NO 2 , and N 2 , to go off readily from the catalyst surface during the decomposition process [16].…”

Section: Characterization Of Nitrogen-doped Zns Photocatalystsmentioning

confidence: 99%

Synthesis of Nitrogen-Doped ZnS with Camellia Brushfield Yellow Nanostructures for Enhanced Photocatalytic Activity under Visible Light Irradiation

Lee¹,

Hong²,

Batalova³

et al. 2013

International Journal of Photoenergy

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Nitrogen modified zinc sulfide photocatalysts were successfully prepared and characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), and surface area analysis. Thermal decomposition of the semisolid was carried out under nitrogen conditions at 500°C for 2 hours, and a series of nitrogen-doped ZnS photocatalysts were produced by controlling inflow flow rate of nitrogen at 15–140 mL/min. Optical characterizations of the synthesized N-doping ZnS substantially show the shifted photoabsorption properties from ultraviolet (UV) region to visible light. The band gaps of nitrogen-doped ZnS composite catalysts were calculated to be in the range of 2.58~2.74 eV from the absorptions edge position. The 15N/ZnS catalyst shows the highest photocatalytic activity, which results in 75.7% degradation of Orange II dye in 5 hrs by visible light irradiation, compared with pristine ZnS and higher percentage N-doping ZnS photocatalysts.

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“…Such features endow ZnS SNTs with special merits in many fields ranging from photonic crystal fabrication, 1,2 pollutant photocatalytic degradation, [3][4][5][6][7][8] photocatalytic water splitting, 9,10 catalytic organic synthesis, 11 to drug delivery and live cell imaging, 12 and antibacterial application. To date, the established routes for preparing ZnS SNTs include the hydrothermal method, 14 aggregated assembly, 15-21 a microwave-assisted method, 22 and soft and hard templates; 23,24 high-quality ZnS SNTs with hierarchical architectures, 3,22,[25][26][27] porous surfaces, 7,12,15,[28][29][30] hollow interiors [31][32][33][34][35] and additional satellite particles 4,7 have been fabricated respectively. Therefore, in the past few decades, great efforts have made to prepare uniform ZnS SNTs with complex secondary structures in order to obtain the largest possible surface areas and as many as possible active sites.…”

Section: Introductionmentioning

confidence: 99%

Aggregation-induced preparation of ultrastable zinc sulfide colloidal nanospheres and their photocatalytic degradation of multiple organic dyes

Yang

Liu

et al. 2015

Phys. Chem. Chem. Phys.

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Monodispersed and ultrastable colloidal ZnS nanospheres (NPs) composed of tiny nanoparticles were successfully synthesized by using a limited ligand-induced in situ aggregation strategy. With such a strategy, the whole size as well as the particle size of those ZnS NPs could be tuned simultaneously by appropriately varying the reaction conditions. Three representative ZnS NP samples with different sphere sizes and particle sizes were thus obtained, which were all proven to possess rather large surface areas, robust structures and excellent colloidal stability. Furthermore, the photocatalytic activities of the as-prepared ZnS NPs toward the photodegradation of eosin B, methylene blue and their binary mixture were explored respectively. An interesting size-dependent degradation performance associated with the ZnS NPs was observed in all the photodegradation cases. Finally, their degradation mechanism was fully elucidated according to the control experiments under different atmospheres in combination with the related energy level information. We believe that the control strategy for tuning the fine and whole structures of spherical nanostructures in a synergistic manner together with the structure-dependent photodegradation performance revealed herein will definitely benefit the fabrication of highly efficient photocatalysts as well as the nanocomplexes with hierarchical architectures.

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Are dopant-stabilized visible light-responsive photocatalysts efficient and stable?

Cited by 10 publications

References 12 publications

Combustion synthesis of cadmium sulphide nanomaterials for efficient visible light driven hydrogen production from water

Combustion synthesis of cadmium sulphide nanomaterials for efficient visible light driven hydrogen production from water

Synthesis of Nitrogen-Doped ZnS with Camellia Brushfield Yellow Nanostructures for Enhanced Photocatalytic Activity under Visible Light Irradiation

Aggregation-induced preparation of ultrastable zinc sulfide colloidal nanospheres and their photocatalytic degradation of multiple organic dyes

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