In-situ fabrication SnO2/SnS2 heterostructure for boosting the photocatalytic degradation of pollutants

Liu, Ying; Pan, Donglai; Xiong, Mingwen; Tao, Ying; Chen, Xiaofeng; Zhang, Dieqing; Huang, Yu; Li, Guisheng

doi:10.1016/s1872-2067(19)63498-4

Cited by 32 publications

(9 citation statements)

References 73 publications

(69 reference statements)

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“…The capacitance formed at the interface of ETL and the electrolyte can be calculated by eq : in which N D , e , ε 0 , ε r , V fb , V , k , and T are the carrier concentration, electron charge, vacuum permittivity, a dielectric constant of semiconductor, flat band potential, applied potential, Boltzmann constant, and absolute temperature, respectively . The flat-band potential ( V fb ) is calculated by the intercept of the fitted linear region on the potential axis and donor density, N D , determined using the equation N D = 1/(ε o ε r e )( d (1/ C 2 )/ dV ) −1 , from the linear slope in Mott–Schottky plot. − Combined with the band gap values in DTS analysis, the energy level structures can be calculated for all films (Table S3). The corresponding energy level structure was inserted in Figure .…”

Section: Resultsmentioning

confidence: 99%

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink

2022

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Improving the electro-optical properties of the electron transport layers (ETLs) is considered one of the most promising solutions to increase the efficiency of the perovskite solar cells (PSCs). In this study, we focused on the spin-coated tin(IV) sulfide (SnS2) as the ETL with two different sulfur sources, thiourea (TU) and thioacetamide (TAA) (SnS2(TU) and SnS2(TAA)), and investigated the effects of surface passivation of the prepared ETL with TU and TAA (SnS2-TU and SnS2-TAA). The treatment is shown to be useful in reducing the surface roughness of the SnS2 ETL and to passivate the interfacial trap states at the ETL/perovskite interface, leading to better contact between them. Among the prepared samples, the SnS2(TU) led to a smoother ETL rather than SnS2(TAA). Finally, the best results of the produced PSCs were related to the samples with SnS2(TU) and passivated with TAA (SnS2(TU)-TAA) in which the power conversion efficiency (PCE) promoted from 11.98% in the case of SnS2(TU) ETL to 15.14% in SnS2(TU)-TAA ETL with a 37% increase in power conversion efficiency (PCE). As an important role, TAA treatment could compensate the sulfur vacancy which was proved by XPS tests. Moreover, the SnS2(TU)-TAA ETL increased the long-term stability of the device without any encapsulation under ambient conditions, retaining 86% of the initial PCE after 30 days, while the device with the SnS2(TU) ETL could maintain about 64% of the original PCE.

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Section: Resultsmentioning

confidence: 99%

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink

2022

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“…The carrier lifetime (τe) of samples are based on the EIS Bode plots (Fig. S4(ab)), proving the carrier transfer process, according to the equation [30] :…”

Section: Catalyst Mechanism Analysismentioning

confidence: 90%

Construction and Photocatalytic Activity of Monoclinic Tungsten Oxide/Red Phosphorus Step-scheme Heterojunction

Munire¹,

Honggang²,

Ma³

et al. 2023

Journal of Inorganic Materials

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S-scheme heterojunction has been extensively investigated for hydrogen evolution and environmental pollution issues.In this study, a monoclinic WO3/hydrothermally treated red phosphorus (HRP) S-scheme composite was prepared by hydrothermal method. The XPS and EPR characterization confirmed that the monoclinic WO3/HRP composite formed S-scheme heterojunction.5%WO3/HRP composite displayed the optimal photocatalytic activity under visible light irradiation, and the degradation rate of Rhodamine B (RhB) reached 97.6% after 4 min of visible light irradiation. Furthermore, the hydrogen evolution rate reached 870.69 μmol•h -1 •g -1 , which was 4 times of that of pure HRP. This could be ascribed to the tight interfacial bonding between WO3 and HRP and the formation of S-scheme heterostructure, which enabled the rapid separation of photogenerated carriers and improved the strong redox capacity. This study provided RP-based photocatalyst for the growing demand for clean energy and drinking water.

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“…SnS 2 has been proved to be a promising photocatalyst under visible light and short-wavelength near-infrared irradiation due to its narrow band gap [50][51][52]. However, being prone to photocorrosion, sluggish photoinduced electrons and holes separation and valence band endowing holes with low oxidation ability restrict its photocatalytic efficiency [50,[52][53][54]. On the other hand, SnO 2 as an n-type semiconductor has a direct wide band gap from 3.2 to 3.72 eV [47,48,54,55].…”

Section: Ni-doped Sns 2 Partial Oxidation In Airmentioning

confidence: 99%

“…However, being prone to photocorrosion, sluggish photoinduced electrons and holes separation and valence band endowing holes with low oxidation ability restrict its photocatalytic efficiency [50,[52][53][54]. On the other hand, SnO 2 as an n-type semiconductor has a direct wide band gap from 3.2 to 3.72 eV [47,48,54,55]. The light-harvesting ability of SnO 2 is limited to the UV region of solar light [48,56].…”

Section: Ni-doped Sns 2 Partial Oxidation In Airmentioning

confidence: 99%

Tuning the band-gap and enhancing the trichloroethylene photocatalytic degradation activities of flower-like Ni-doped SnS2/SnO2 heterostructures by partial oxidation

Afzali

Beydokhti

Khodadadi

et al. 2022

Journal of Environmental Chemical Engineering

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In-situ fabrication SnO2/SnS2 heterostructure for boosting the photocatalytic degradation of pollutants

Cited by 32 publications

References 73 publications

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink

Construction and Photocatalytic Activity of Monoclinic Tungsten Oxide/Red Phosphorus Step-scheme Heterojunction

Tuning the band-gap and enhancing the trichloroethylene photocatalytic degradation activities of flower-like Ni-doped SnS2/SnO2 heterostructures by partial oxidation

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In-situ fabrication SnO2/SnS2 heterostructure for boosting the photocatalytic degradation of pollutants

Cited by 32 publications

References 73 publications

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS2 Electron Transporting Layer Based on Molecular Ink

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS2 Electron Transporting Layer Based on Molecular Ink

Construction and Photocatalytic Activity of Monoclinic Tungsten Oxide/Red Phosphorus Step-scheme Heterojunction

Tuning the band-gap and enhancing the trichloroethylene photocatalytic degradation activities of flower-like Ni-doped SnS2/SnO2 heterostructures by partial oxidation

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Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink