Graphene decorated MoS<sub>2</sub>for eosin Y-sensitized hydrogen evolution from water under visible light

Liu, Xing; Zhao, Lanhua; Lai, Hua; Wei, Yongxing; Yang, Guihua; Yin, Shuang‐Feng; Yi, Zichuan

doi:10.1039/c7ra09009a

Cited by 25 publications

(22 citation statements)

References 48 publications

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“…50 The electrochemical stability window of the prepared SPEs is determined using linear sweep voltammetry (LSV) from 2 V to 6 V at the voltage rate of 1 mV s À1 at 25 C. Prepared SPEs are again sandwiched in between a working electrode of stainless steel and a counter electrode of lithium metal. 51 The galvanostatic charge-discharge (GCD) cycling test in CR2032 cells (Li|solid polymer electrolyte|LiFePO 4 ) is also carried using WMPG 1000S analyzer. Aer the 24 h heat treatment at 80 C for the solid contact between electrodes and the SPE lm, the GCD cycles are performed from 2.8 V to 4.2 V at various current rates (1C ¼ 150 mA h g À1 ) at various temperatures.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Effect of morphological change of copper-oxide fillers on the performance of solid polymer electrolytes for lithium-metal polymer batteries

et al. 2019

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Solid polymer electrolytes (SPEs) for Li-metal polymer batteries are prepared, in which poly(ethylene oxide) (PEO), lithium bis(trifluoromethylsulfonyl)imide (LiTFSI), and copper-oxide fillers are formulated. Their structural and electrochemical properties are analyzed when the morphology of the copper-oxide fillers has been modulated to spherical or dendritic structure. The ionic conductivity obtained by electrochemical impedance spectroscopy (EIS) has been increased to 1.007 Â 10 À4 S cm À1 at 30 C and 1.368 Â 10 À3 S cm À1 at 60 C, as the 5 wt% dendritic fillers have been added to the SPEs. This ionic conductivity value is 1.3 times higher than that of 5 wt% spherical filler-contained SPEs. The analyses of differential scanning calorimetry (DSC) and X-ray diffraction (XRD) indicate that the increase of ionic conductivity is due to the remarkable decrease of crystallinity upon the addition of copper-oxide filler into PEO matrix of SPEs. The fabricated SPEs with the dendritic copper-oxide fillers present a total ionic transference number of 0.99 and a lithium-ion transference number of 0.38. More importantly, it presents a stable potential window of 2.0-4.8 V at 25 C and high thermal stability up to 300 C. The specific discharge capacity of the prepared cell with the dendritic filler-contained SPEs is measured to be 51 mA h g À1 and 125 mA h g À1 under 0.1 current-rate (C-rate) at 25 C and 60 C, respectively. In this study, the ionic conductivity and the electrochemical performance of the PEO-based polymer electrolyte have been evaluated when morphologically different copper-oxide fillers have been incorporated into the PEO matrix. We have also confirmed the safety and the flexibility of the prepared solid polymer electrolytes when they are used in flexible lithium-metal polymer batteries (LMPBs).

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Section: Electrochemical Characterizationmentioning

confidence: 99%

Effect of morphological change of copper-oxide fillers on the performance of solid polymer electrolytes for lithium-metal polymer batteries

et al. 2019

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“…Accordingly, the design and development of proficient catalyst are a significant task for the catalytic reduction of 4‐NP and EY with aspects of the efficient and fast process. The nanomaterial‐based catalysts are enormously developed for their superior catalytic performance in the reduction of pollutants . In general, metal nanoparticles are usually adopted for the catalysis application; especially palladium nanoparticles (Pd NPs) exhibited excellent catalytic activities .…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Nanohybrid of Palladium Nanoparticles Encapsulated by Carbon‐Dots for Exploiting Synergetic Applications

Dhenadhayalan

Hsin

Lin

2019

Adv Materials Inter

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and textile. [2,7] It can be readily bound to biomolecules and consequently used as a strain to tissue and cells. [8] However, the application of abnormal level of EY becomes toxic and unfriendly to both the environment and living things. The development of reduction/degradation of nitro compound and dye is thus much needed to convert these materials into harmless products. For instance, the 4-NP and EY could be catalytically reduced into the formation of 4-aminophenol and reduced form of EY, respectively, and believe that this process could become potentially an effective way to treat 4-NP and EY in polluted water. Accordingly, the design and development of proficient catalyst are a significant task for the catalytic reduction of 4-NP and EY with aspects of the efficient and fast process. The nanomaterial-based catalysts are enormously developed for their superior catalytic performance in the reduction of pollutants. [9][10][11][12][13] In general, metal nanoparticles are usually adopted for the catalysis application; especially palladium nanoparticles (Pd NPs) exhibited excellent catalytic activities. [14][15][16] Such metal nanoparticles play a vital role in the catalytic reduction showing effective performance compared to other bare nanomaterials. In order to further improve their catalytic activity, the metal nanoparticles were incorporated with diverse nanomaterials including carbon-based materials, transition metal dichalcogenides (TMD), and porous organic cages. [17][18][19][20][21][22][23][24][25] Compared to other fluorescent nanomaterials, the C-dots can be easily synthesized from different kind of sources including organic molecules, biowastes, proteins, amino acids, and so on. [26][27][28][29][30][31][32] Moreover, the surface of C-dots can be modified with several capping agents to improve their fluorescence properties according to the applications. [33][34][35][36][37] That's why the C-dots have been extensively utilized in the fields of chemo-and biosensors, and optoelectronic applications. Thus far, the C-dots are much less utilized in the catalysis as in the sensing application. By taking advantage of C-dots and Pd NPs, this work aims to develop a superior multifunctional nanohybrid in the multiple applications including chemical sensor and catalysis.With this intention, we have synthesized carbon-dots to encapsulate palladium nanoparticles (Pd/C-dots) by the photochemical method. Prior to the synthesis of Pd/C-dots, Palladium nanoparticles encapsulated in the carbon dots (Pd/C-dots) are demonstrated to play a role of multifunctional nanohybrid in the synergetic applications of sensor and catalysis. The photochemical method is applied to synthesize Pd/C-dots in which Pd nanoparticles (NPs) are dispersedly encapsulated by C-dots layer. The nanohybrid can function as a fluorescent sensor and reductive catalyst, due to the inherent properties of C-dots and Pd NPs, respectively. The Pd/C-dots exhibit a highly selective and sensitive detection toward the nickel (Ni 2+ ) ion with a detection limit of ...

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“…The bands at 1015 and 1100 cm −1 can be attributed to the bending vibration of C‐H in benzene ring groups (36). The band around 2350 cm −1 characterizes CO 2 (C=O=C stretching vibration) from the air, given that our tests were directly conducted under the atmosphere (8). Based on the above analysis, the IR spectra further confirm that all the three Ni‐MOF are [Ni 3 (OH) 2 (C 8 H 4 O 4 ) 2 (H 2 O) 4 ]·xH 2 O.…”

Section: Resultsmentioning

confidence: 99%

“…The photocatalytic system typically contains a photosensitizer, H 2 evolution catalyst and sacrificial electron donor. Compared with transition metal (e.g., Ru and Rh) complexes (4–6), xanthenes (e.g., eosin Y, erythrosine) are promising organic photosensitizers for H 2 evolution from water splitting due to their low cost and readily availability (7–9).…”

Section: Introductionmentioning

confidence: 99%

A Simple Ni‐based Metal–organic Framework as Catalyst for Dye‐sensitized Photocatalytic H₂ Evolution from Water Reduction

Liu

Lai

et al. 2020

Photochem & Photobiology

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Metal–organic frameworks (MOF) are recently developed coordination porous materials, and their unique structures are very conducive to catalytic reactions. In this paper, p‐benzenedicarboxylic acid (PBA)‐Ni2+ MOF materials (denoted as PBA‐Ni‐x, where x represents the initial ratio of PBA to Ni2+) were synthesized by a hydrothermal method and characterized by X‐ray diffraction (XRD), Fourier transform infrared spectra (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and N2 gas adsorption. H2 gas was produced using the synthesized MOF as a photocatalyst and Eosin Y as a photosensitizer. The dependence of the special surface area and thickness of the nanosheets of Ni‐MOF on the initial ratio of PBA to Ni2+ (PBA/Ni2+) was investigated. The BET surface areas of PBA‐Ni‐1 PBA‐Ni‐2 and PBA‐Ni‐3 are 11.00, 24.61 and 13.04 m2 g−1, respectively. And the thicknesses of nanosheets are approximately 600–1000, 200–500 and 300–700 nm. Among the three materials, PBA‐Ni‐2 has the thinnest sheet‐like structure and largest surface area. Thus, it displays the highest H2 evolution rate of 20.0 μmol h−1. The noble‐metal‐free hydrogen production system is valuable for the application of MOF materials in photocatalytic water splitting.

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Graphene decorated MoS₂for eosin Y-sensitized hydrogen evolution from water under visible light

Cited by 25 publications

References 48 publications

Effect of morphological change of copper-oxide fillers on the performance of solid polymer electrolytes for lithium-metal polymer batteries

Effect of morphological change of copper-oxide fillers on the performance of solid polymer electrolytes for lithium-metal polymer batteries

Multifunctional Nanohybrid of Palladium Nanoparticles Encapsulated by Carbon‐Dots for Exploiting Synergetic Applications

A Simple Ni‐based Metal–organic Framework as Catalyst for Dye‐sensitized Photocatalytic H₂ Evolution from Water Reduction

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Graphene decorated MoS2for eosin Y-sensitized hydrogen evolution from water under visible light

Cited by 25 publications

References 48 publications

Effect of morphological change of copper-oxide fillers on the performance of solid polymer electrolytes for lithium-metal polymer batteries

Effect of morphological change of copper-oxide fillers on the performance of solid polymer electrolytes for lithium-metal polymer batteries

Multifunctional Nanohybrid of Palladium Nanoparticles Encapsulated by Carbon‐Dots for Exploiting Synergetic Applications

A Simple Ni‐based Metal–organic Framework as Catalyst for Dye‐sensitized Photocatalytic H2 Evolution from Water Reduction

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Graphene decorated MoS₂for eosin Y-sensitized hydrogen evolution from water under visible light

A Simple Ni‐based Metal–organic Framework as Catalyst for Dye‐sensitized Photocatalytic H₂ Evolution from Water Reduction