Characteristics of traps in AgIn5S8 single crystals

Özdemir, Selahattin; Bucurgat, Mahmut; Fırat, Tezer

doi:10.1016/j.jallcom.2014.05.093

Cited by 4 publications

(4 citation statements)

References 20 publications

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“…[1,2,21] The deep carrier traps were identified by ordinary photo-induced current transient spectroscopy (PICTS) [16] and by thermally-stimulated current. [22] The trap defect concentration was moderate, in the range of 10 15 -10 16 cm -3 . Some centers with large cross-section were assigned to presence of the PSFs.…”

Section: Introductionmentioning

confidence: 95%

Carrier dynamics in highly excited TlInS₂: evidence of 2D electron–hole charge separation at parallel layers

Grivickas

Ščajev

Bikbajevas

et al. 2019

Phys. Chem. Chem. Phys.

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Section: Introductionmentioning

confidence: 95%

Carrier dynamics in highly excited TlInS₂: evidence of 2D electron–hole charge separation at parallel layers

Grivickas

Ščajev

Bikbajevas

et al. 2019

Phys. Chem. Chem. Phys.

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“…Notwithstanding, conventional ternary metal sulfides have been plagued by poor stability. Thus, researchers have begun to shift their focus towards ternary metal sulfides such as ZnIn2S4 [15], CdIn2S4 [16], CuInS2 [17], and AgIn5S8 [18], which have been shown to offer richer active sites and improved stability as compared to monometallic sulfides [19,20]. Although the reduction efficiency of these compounds may be limited by the slow electron transfer behavior and high carrier recombination efficiency, strategies such as morphology control, defect engineering, heterostructure construction, and co-catalyst loading have been explored to enhance their interface structure and behavior, ultimately leading to improved conversion efficiency and selectivity [21,22].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Photocatalytic Pollutant Degradation through S-Scheme Electron Transfer and Sulfur Vacancies in BiFeO3/Zn2S4 Heterojunctions

Zheng¹,

Lin²,

Wen³

et al. 2023

Preprint

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Photocatalytic degradation plays a crucial role in wastewater treatment, and the key to achieving high efficiency is to develop photocatalytic systems that possess excellent light absorption, carrier separation efficiency, and surface-active sites. Among various photocatalytic systems, S-type heterojunctions have shown remarkable potential for efficient degradation. This work delves into construction of S-type heterojunctions of ternary indium metal sulfide and bismuth ferrite nanofibers with introduction of sulfur vacancy defects and morphology modifications to enhance the photocatalytic degradation performance. Through the impregnation method, BiFeO3/Zn2S4 heterojunction materials were synthesized and optimized30% BiFeO3/Zn2S4 heterojunction exhibited superior photocatalytic performance with higher sulfur vacancy concentration than Zn2S4. The in-situ XPS results demonstrate that the electrons between Zn2S4 and BFO are transferred via S-Scheme, and after modification, Zn2S4 has a more favorable surface morphology for electron transport, and its flower-like structure interacts with the nanofibers of BFO, which has a further enhancement of the reaction efficiency for degrading pollutants. This exceptional material demonstrated a remarkable 99% degradation of Evans blue within 45 min and a significant 68% degradation of ciprofloxacin within 90 min. This work provides a feasible idea for developing photocatalysts to deal with the problem of polluted water resources under practical conditions.

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“…Notwithstanding, conventional ternary metal sulfides have been plagued by poor stability. Thus, researchers have begun to shift their focus towards ternary metal sulfides, such as ZnIn 2 S 4 [15], CdIn 2 S 4 [16], CuInS 2 [17], and AgIn 5 S 8 [18], which have been shown to offer richer active sites and improved stability as compared to monometallic sulfides [19,20]. Although the reduction efficiency of these compounds may be limited by the slow electron transfer behavior and high carrier recombination efficiency, strategies such as morphology control, defect engineering, heterostructure construction, and co-catalyst loading have been explored to enhance their interface structure and behavior, ultimately leading to improved conversion efficiency and selectivity [21,22].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Photocatalytic Pollutant Degradation through S-Scheme Electron Transfer and Sulfur Vacancies in BiFeO3/ZnIn2S4 Heterojunctions

et al. 2023

View full text Add to dashboard Cite

Photocatalytic degradation plays a crucial role in wastewater treatment, and the key to achieving high efficiency is to develop photocatalytic systems that possess excellent light absorption, carrier separation efficiency, and surface-active sites. Among various photocatalytic systems, S-type heterojunctions have shown remarkable potential for efficient degradation. This work delves into the construction of S-type heterojunctions of ternary indium metal sulfide and bismuth ferrite nanofibers with the introduction of sulfur vacancy defects and morphology modifications to enhance the photocatalytic degradation performance. Through the impregnation method, BiFeO3/ZnIn2S4 heterojunction materials were synthesized and optimized. The 30% BiFeO3/ZnIn2S4 heterojunction exhibited superior photocatalytic performance with higher sulfur vacancy concentration than ZnIn2S4. The in-situ XPS results demonstrate that the electrons between ZnIn2S4 and BFO are transferred via the S-Scheme, and after modification, ZnIn2S4 has a more favorable surface morphology for electron transport, and its flower-like structure interacts with the nanofibers of BFO, which has a further enhancement of the reaction efficiency for degrading pollutants. This exceptional material demonstrated a remarkable 99% degradation of Evans blue within 45 min and a significant 68% degradation of ciprofloxacin within 90 min. This work provides a feasible idea for developing photocatalysts to deal with the problem of polluted water resources under practical conditions.

show abstract

Characteristics of traps in AgIn5S8 single crystals

Cited by 4 publications

References 20 publications

Carrier dynamics in highly excited TlInS₂: evidence of 2D electron–hole charge separation at parallel layers

Carrier dynamics in highly excited TlInS₂: evidence of 2D electron–hole charge separation at parallel layers

Enhancing Photocatalytic Pollutant Degradation through S-Scheme Electron Transfer and Sulfur Vacancies in BiFeO<sub>3</sub>/Zn<sub>2</sub>S<sub>4</sub> Heterojunctions

Enhancing Photocatalytic Pollutant Degradation through S-Scheme Electron Transfer and Sulfur Vacancies in BiFeO3/ZnIn2S4 Heterojunctions

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Characteristics of traps in AgIn5S8 single crystals

Cited by 4 publications

References 20 publications

Carrier dynamics in highly excited TlInS2: evidence of 2D electron–hole charge separation at parallel layers

Carrier dynamics in highly excited TlInS2: evidence of 2D electron–hole charge separation at parallel layers

Enhancing Photocatalytic Pollutant Degradation through S-Scheme Electron Transfer and Sulfur Vacancies in BiFeO<sub>3</sub>/Zn<sub>2</sub>S<sub>4</sub> Heterojunctions

Enhancing Photocatalytic Pollutant Degradation through S-Scheme Electron Transfer and Sulfur Vacancies in BiFeO3/ZnIn2S4 Heterojunctions

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Carrier dynamics in highly excited TlInS₂: evidence of 2D electron–hole charge separation at parallel layers

Carrier dynamics in highly excited TlInS₂: evidence of 2D electron–hole charge separation at parallel layers