Carbon dot-assisted hydrothermal synthesis of flower-like MoS<sub>2</sub> nanospheres constructed by few-layered multiphase MoS<sub>2</sub> nanosheets for supercapacitors

Wu, Jinzhu; Dai, Jun; Shao, Yanbin; Cao, Meiqi; Wu, Xiaohong

doi:10.1039/c6ra15074h

Cited by 41 publications

(21 citation statements)

References 34 publications

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“…The PXRD pattern of mixed phase 2D‐MoS 2 in Figure b shows four characteristic peaks at 2 θ =14.22, 32.90, 39.65, and 58.44 degrees corresponding to (002), (100), (103) and (110) planes, respectively, and matching with JCPDS 37–1492, indicating mixed phase presence …”

Section: Resultsmentioning

confidence: 71%

“…The PXRD pattern of mixed phase 2D-MoS 2 in Figure 3b shows four characteristic peaks at 2q = 14.22, 32.90,3 9.65, and 58.44 degrees correspondingt o( 002),( 100), (103) and (110) planes, respectively,a nd matching with JCPDS 37-1492, indicating mixed phase presence. [32] Raman analysisw as also performed ( Figure 3d). Here, Ramans pectra of 2D-MoS 2 showed three bands due to J 1 ,J 2 ,J 3 modesa t1 57, 238 and 331 cm À1 and an E 1 g band at 297 cm À1 , indicating the 1T phase.…”

Section: Resultsmentioning

confidence: 99%

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Mixed‐Phase 2D‐MoS₂ as an Effective Photocatalyst for Selective Aerobic Oxidative Coupling of Amines under Visible‐Light Irradiation

Girish

Biswas

2018

Chemistry A European J

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Metal-semiconductor heterojunctions play a vital role in photocatalysis, yet their preparation can be exceedingly difficult. The heterojunction helps not only to separate the charges and inhibit recombination processes but also to transfer the photogenerated electron/hole to the reacting molecule. Here, we demonstrate 1T (metallic)-2H (semiconducting) phase boundaries intrinsic to individual sheets of chemically exfoliated 2D-MoS can serve as heterojunctions for enhanced photocatalysis in comparison to only semiconducting phase. Due to the abundance of heterojunctions in these multiphasic materials, chemically exfoliated 2D-MoS provides improved stability and transfer of photogenerated charges to the reactants, giving better yield. We demonstrate that this easy to synthesize material is an effective photocatalyst for the aerobic oxidative coupling of amines to imines under visible light irradiation. Given its broad applications, we believe mixed phase 2D-MoS can be of interest to several industrial synthetic applications related to semiconductor-based photocatalysis. As an added advantage, this heterogeneous photocatalyst can be recycled for several times up to five cycles without any significant loss in the activity.

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Section: Resultsmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Mixed‐Phase 2D‐MoS₂ as an Effective Photocatalyst for Selective Aerobic Oxidative Coupling of Amines under Visible‐Light Irradiation

Girish

Biswas

2018

Chemistry A European J

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“…Yan et al used the hydrothermal method to obtain 4–6 nm thick MoS 2 nano-sheets. The ammonium tetrathiomolybdate was used in a hydrothermal method, which has the advantages of simple operation, mild conditions, and low pollution, but it cannot control the synthesis of monolayer MoS 2 , and the crystallization quality is poor [20]. Zhan et al and Lin et al deposited Mo and MoO 3 on the SiO 2 /Si substrate and the sapphire substrate, respectively.…”

Section: Introductionmentioning

confidence: 99%

Research on the Factors Affecting the Growth of Large-Size Monolayer MoS2 by APCVD

et al. 2018

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The transition-metal chalcogenides (TMDs) are gaining increased attention from many scientists recently. Monolayer MoS2 is an emerging layered TMD material with many excellent physical and electrical properties. It can be widely used in catalysis, transistors, optoelectronics and integrated circuits. Here, the large-sized monolayer MoS2 is grown on the silicon substrate with a 285-nm-thick oxide layer by atmospheric pressure chemical vapor deposition (APCVD) of sulfurized molybdenum trioxide. This method is simple and it does not require vacuum treatment. In addition, the effects of growth conditions, such as sulfur source, molybdenum source, growth temperature, and argon flow rate on the quality and area of MoS2 are further studied systematically. These analysis results help to master the morphology and optical properties of monolayer MoS2. The high quality, excellent performance, and large-size monolayer MoS2 under the optimal growth condition is characterized by optical microscopy, AFM, XPS, photoluminescence, and Raman spectroscopy. The Raman spectrum and PL mapping show that the grown MoS2 is a uniform triangular monolayer with a side length of 100 μm, which can pave the way for the applications of photodetectors and transistors.

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“…3d shows the corresponding SAED pattern of MoS 2 -AC-S, which reveals the presence of a ring-like pattern, thus corroborating the existence of multi-layer polycrystalline nanosheets. 34 The size and thickness of the as-exfoliated MoS 2 -AC-S was further veried by AFM (Fig. 3e).…”

Section: Resultsmentioning

confidence: 97%

Hydrothermal-assisted shearing exfoliation for few-layered MoS₂ nanosheets

Liu

Cheng

2019

RSC Adv.

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Carbon dot-assisted hydrothermal synthesis of flower-like MoS₂ nanospheres constructed by few-layered multiphase MoS₂ nanosheets for supercapacitors

Abstract: Molybdenum disulfide (MoS2) has emerged as a promising electrode material for supercapacitors.

Cited by 41 publications

References 34 publications

Mixed‐Phase 2D‐MoS₂ as an Effective Photocatalyst for Selective Aerobic Oxidative Coupling of Amines under Visible‐Light Irradiation

Mixed‐Phase 2D‐MoS₂ as an Effective Photocatalyst for Selective Aerobic Oxidative Coupling of Amines under Visible‐Light Irradiation

Research on the Factors Affecting the Growth of Large-Size Monolayer MoS2 by APCVD

Hydrothermal-assisted shearing exfoliation for few-layered MoS₂ nanosheets

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Carbon dot-assisted hydrothermal synthesis of flower-like MoS2 nanospheres constructed by few-layered multiphase MoS2 nanosheets for supercapacitors

Abstract: Molybdenum disulfide (MoS2) has emerged as a promising electrode material for supercapacitors.

Cited by 41 publications

References 34 publications

Mixed‐Phase 2D‐MoS2 as an Effective Photocatalyst for Selective Aerobic Oxidative Coupling of Amines under Visible‐Light Irradiation

Mixed‐Phase 2D‐MoS2 as an Effective Photocatalyst for Selective Aerobic Oxidative Coupling of Amines under Visible‐Light Irradiation

Research on the Factors Affecting the Growth of Large-Size Monolayer MoS2 by APCVD

Hydrothermal-assisted shearing exfoliation for few-layered MoS2 nanosheets

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Carbon dot-assisted hydrothermal synthesis of flower-like MoS₂ nanospheres constructed by few-layered multiphase MoS₂ nanosheets for supercapacitors

Mixed‐Phase 2D‐MoS₂ as an Effective Photocatalyst for Selective Aerobic Oxidative Coupling of Amines under Visible‐Light Irradiation

Mixed‐Phase 2D‐MoS₂ as an Effective Photocatalyst for Selective Aerobic Oxidative Coupling of Amines under Visible‐Light Irradiation

Hydrothermal-assisted shearing exfoliation for few-layered MoS₂ nanosheets