Evolutional photoluminescence property in ultraviolet-ozone-treated monolayer MoS2

Xie, Hongguang; Liu, Chao; Hu, Huamin; Yin, Hao; Zhong, Jingxian; Zong, Xinrong; Jiang, Xiaohong; Zhang, Junran; Wang, Wei; Tao, Ye; Chen, Runfeng; Qin, Tianshi; Ouyang, Gang; Wang, Lin

doi:10.1016/j.apsusc.2020.148809

Cited by 9 publications

(10 citation statements)

References 32 publications

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“…This correlation suggests that the intrinsic PL intensity of the ribbon is comparable to that of the pristine flake and the concentration of defects in the basal plane is low enough to avoid defect-induced PL quenching. 47 Our observations are further supported by Raman spectroscopy (Fig. S6†) and corroborate the high quality of the MoS 2 nanoribbons after patterning.…”

Section: Resultssupporting

confidence: 82%

Edge-dominated hydrogen evolution reactions in ultra-narrow MoS₂ nanoribbon arrays

et al. 2023

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Section: Resultssupporting

confidence: 82%

Edge-dominated hydrogen evolution reactions in ultra-narrow MoS₂ nanoribbon arrays

et al. 2023

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“…Oxygen absorption is further intentionally introduced into MnPS 3 using ultraviolet-ozone (UVO) treatment, which is widely used to introduce oxygen bonds in 2D materials. [49][50][51][52][53][54] Characterization result shows that the morphology and crystal structure of the sample did not change after 7 min UVO treatment (see Figure S17, Supporting Information). In Figure 7a, we compare the PL spectra for the MnPS 3 flake under UVO treatment for 0, 3, and 7 min, respectively.…”

Section: Origin Of the Photoluminescence Peaksmentioning

confidence: 99%

Strong Neel Ordering and Luminescence Correlation in a Two‐Dimensional Antiferromagnet

Zhou

et al. 2022

Laser & Photonics Reviews

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Magneto‐optical effect has been widely used in light modulation, optical sensing, and information storage. Recently discovered 2D van der Waals layered magnets are considered as promising platforms for investigating novel magneto‐optical phenomena and devices, due to the long‐range magnetic ordering down to atomically thin thickness, rich species, and tunable properties. However, majority 2D antiferromagnets suffer from low luminescence efficiency which hinders their magneto‐optical investigations and applications. This work uncovers strong light‐magnetic ordering interactions in 2D antiferromagnetic MnPS3 using a newly‐emerged near‐infrared photoluminescence (PL) mode far below its intrinsic bandgap. This ingap PL mode shows strong correlation with the Neel ordering and persists down to monolayer thickness. Combining the density‐functional theory (DFT), scanning transmission electron microscopy (STEM), and X‐ray photoelectron spectroscopy (XPS), this work illustrates the origin of the PL mode and its correlation with Neel ordering, which can be attributed to the oxygen ion‐mediated states. Moreover, the PL strength can be further tuned and enhanced using ultraviolet‐ozone (UVO) treatment. The studies offer an effective approach to investigate light‐magnetic ordering interactions in 2D antiferromagnetic semiconductors.

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“…The tauc plot calculated using the UV–vis spectra provided us with the value of band gap of respective as-synthesized nanostructures using the following equation false( α h υ false) 1 / γ = A ( h υ − E g ) where α = absorption coefficient, h = Planck’s constant, υ = frequency, and E g = band gap energy. A transition value (γ) can be defined as (1/2, 3/2, 2, 3) assigned to direct, forbidden, indirect, and forbidden indirect transitions. , In this study, the band gap values of 0, 5, 10, 15, and 20% Mn-doped MoS 2 were calculated to be 1.98, 1.8, 1.7, 1.12, and 1.103 eV, respectively. This result indicates that the band gap decreases with an increase in the concentration of Mn, which is consistent with the presence of manganese in the as-synthesized samples.…”

Section: Resultsmentioning

confidence: 83%

Cost-Effective and Highly Efficient Manganese-Doped MoS₂ Nanosheets as Visible-Light-Driven Photocatalysts for Wastewater Treatment

et al. 2023

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One of the main objectives in wastewater treatment and sustainable energy production is to find photocatalysts that are favorably efficient and cost-effective. Transition-metal dichalcogenides (TMDs) are promising photocatalytic materials; out of all, MoS2 is extensively studied as a cocatalyst in the TMD library due to its exceptional photocatalytic activity for the degradation of organic dyes due to its distinctive morphology, adequate optical absorption, and rich active sites. However, sulfur ions on the active edges facilitate the catalytic activity of MoS2. On the basal planes, sulfur ions are catalytically inactive. Injecting metal atoms into the MoS2 lattice is a handy approach for triggering the surface of the basal planes and enriching catalytically active sites. Effective band gap engineering, sulfur edges, and improved optical absorption of Mn-doped MoS2 nanostructures are promising for improving their charge separation and photostimulated dye degradation activity. The percentage of dye degradation of MB under visible-light irradiations was found to be 89.87 and 100% for pristine and 20% Mn-doped MoS2 in 150 and 90 min, respectively. However, the degradation of MB dye was increased when the doping concentration in MoS2 increased from 5 to 20%. The kinetic study showed that the first-order kinetic model described the photodegradation mechanism well. After four cycles, the 20% Mn-doped MoS2 catalysts maintained comparable catalytic efficacy, indicating its excellent stability. The results demonstrated that the Mn-doped MoS2 nanostructures exhibit exceptional visible-light-driven photocatalytic activity and could perform well as a catalyst for industrial wastewater treatment.

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Evolutional photoluminescence property in ultraviolet-ozone-treated monolayer MoS2

Cited by 9 publications

References 32 publications

Edge-dominated hydrogen evolution reactions in ultra-narrow MoS₂ nanoribbon arrays

Edge-dominated hydrogen evolution reactions in ultra-narrow MoS₂ nanoribbon arrays

Strong Neel Ordering and Luminescence Correlation in a Two‐Dimensional Antiferromagnet

Cost-Effective and Highly Efficient Manganese-Doped MoS₂ Nanosheets as Visible-Light-Driven Photocatalysts for Wastewater Treatment

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Evolutional photoluminescence property in ultraviolet-ozone-treated monolayer MoS2

Cited by 9 publications

References 32 publications

Edge-dominated hydrogen evolution reactions in ultra-narrow MoS2 nanoribbon arrays

Edge-dominated hydrogen evolution reactions in ultra-narrow MoS2 nanoribbon arrays

Strong Neel Ordering and Luminescence Correlation in a Two‐Dimensional Antiferromagnet

Cost-Effective and Highly Efficient Manganese-Doped MoS2 Nanosheets as Visible-Light-Driven Photocatalysts for Wastewater Treatment

Contact Info

Product

Resources

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Edge-dominated hydrogen evolution reactions in ultra-narrow MoS₂ nanoribbon arrays

Edge-dominated hydrogen evolution reactions in ultra-narrow MoS₂ nanoribbon arrays

Cost-Effective and Highly Efficient Manganese-Doped MoS₂ Nanosheets as Visible-Light-Driven Photocatalysts for Wastewater Treatment