Efficient hydrogen/oxygen evolution and photocatalytic dye degradation and reduction of aqueous Cr(<scp>vi</scp>) by surfactant free hydrophilic Cu<sub>2</sub>ZnSnS<sub>4</sub> nanoparticles

Kush, Priya; Deori, Kalyanjyoti; Kumar, Ajay; Deka, Sasanka

doi:10.1039/c4ta06551d

Cited by 143 publications

(58 citation statements)

References 43 publications

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“…Also, Cu 2 FeSnS 4 (CFTS) and CZTSeS nanofibers were fabricated by our group for the first time . In previous studies, photocatalytic hydrogen evolution has been reported for CZTS nanoplates and nanocrystals . However, there has been only one report on the application of CZTS material as an H 2 ‐evolution electrocatalyst.…”

Section: Figurementioning

confidence: 74%

Earth‐Abundant Cu₂CoSnS₄ Nanofibers for Highly Efficient H₂ Evolution at Soft Interfaces

et al. 2015

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Cu 2 CoSnS 4 (CCTS) nanofibers have been fabricated by electrospinninga nd exhibit an excellent morphology with an average nanofiber diameter of 150 nm. Polyacrylonitrile (PAN) was used as templating polymer that leads to ad ecrease in imperfectionsi nt he crystalline nanofibers. CCTS and Cu 2 ZnSnS 4 (CZTS) nanofibers, based on abundanta nd environmental friendly elements, efficiently enhanced the rates of biphasic proton reduction in the presence of an organic solubilized electron donor, decamethylferrocene (DMFc). This work paves the way for the exploration of copper-based chalcogenides as electrocatalysts for the hydrogen evolution reaction to replace noble metal Pt.The hydrogen evolutionr eaction( HER), which generates molecular hydrogen via water splitting, underpins several emerging clean-energy technologies. However, substantial materials and technological advancements are necessary to make widespread implementation of water splitting economically viable. Low-costa nd highly efficient earth-abundant catalysts to replace Pt-based materials for HER have attracted great interest in renewable energy research. Copper-based chalcogenides composed of non-toxic and earth-abundant elements show great potential in solar cell applications, [1,2] as electrocatalysts [3,4] and as photocatalysts for hydrogen evolution. [5][6][7] More recently,t he chalcogenides emiconductor compound Cu 2 ZnSnS 4 (CZTS) has been suggested as ac andidate for photocatalytic [5,6] and electrocatalytic [4] hydrogen evolution from water due to its high absorption coefficient, suitable band gap (1.5 eV), abundancy and nontoxicity.I th as also been reported that Cu 2 ZnSnS 1Àx Se x (CZTSeS) shows comparable or superior electrocatalytic activity relative to noble metal Pt in solar cells. [8] Among the family of chalcogenide-based semiconductors, Cu 2 CoSnS 4 (CCTS) is an analog alternative absorber with ab and gap in the range from 1.2 to 1.5 eV,w hich makes it ap roper material in energy-harvesting applications. [9][10][11] Most studies have focused on the synthesis of the Cu 2 -II-IV-VI 4

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Section: Figurementioning

confidence: 74%

Earth‐Abundant Cu₂CoSnS₄ Nanofibers for Highly Efficient H₂ Evolution at Soft Interfaces

et al. 2015

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“…[5,38] This shift can be attributed also to the removal of someb romine atoms from EY and the possible formation of fluorescein-likes pecies. [5,38] This shift can be attributed also to the removal of someb romine atoms from EY and the possible formation of fluorescein-likes pecies.…”

Section: Photocatalytic Hydrogen Evolution By Cxts Nanofibersmentioning

confidence: 96%

“…[5,38] This shift can be attributed also to the removal of someb romine atoms from EY and the possible formation of fluorescein-likes pecies. [5] The differences between the HER rates of the nanofibersc ould be ascribed to the conduction-band (CB) levels. These resultsc omply with the hydrogen production rates of the nanofibers.…”

Section: Photocatalytic Hydrogen Evolution By Cxts Nanofibersmentioning

confidence: 96%

Dye‐Sensitized Cu₂XSnS₄ (X=Zn, Ni, Fe, Co, and Mn) Nanofibers for Efficient Photocatalytic Hydrogen Evolution

2016

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The photocatalytic hydrogen evolution activities of low-cost and noble-metal-free Cu2 XSnS4 (X=Zn, Ni, Fe, Co, and Mn) nanofiber catalysts have been investigated using triethanolamine as an electron donor and eosin Y as a photosensitizer under visible-light irradiation. The rates of hydrogen evolution by Cu2 XSnS4 (X=Zn, Ni, Fe, Co, and Mn) nanofibers have been compared with each other and with that of the noble metal Pt. The hydrogen evolution rates for the nanofibers change in the order Cu2 NiSnS4 >Cu2 FeSnS4 >Cu2 CoSnS4 >Cu2 ZnSnS4 >Cu2 MnSnS4 (2028, 1870, 1926, 1420, and 389 μmol g(-1) h(-1) , respectively). The differences between the hydrogen evolution rates of the nanofibers could be attributed to their energy levels. Moreover, Cu2 NiSnS4, Cu2 FeSnS4 , and Cu2 CoSnS4 nanofibers show higher and more stable photocatalytic hydrogen production rates than that of the noble metal Pt under long-term irradiation with visible light.

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“…Data on photocatalytic degradation of Methylene Blue in the presence of kesterite Cu2ZnSnS4 can be found in recent literature [45][46][47][48]. However, the photocatalytic activity of the synthesized stannite Cu2FeSnS4 sample is here studied for the first time.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Chalcogenide Quaternary Cu2FeSnS4 Nanocrystals for Solar Cells: Explosive Character of Mechanochemical Synthesis and Environmental Challenge

Baláž

Sayagués

et al. 2017

Crystals

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Abstract:In this study we demonstrate the synthesis of quaternary semiconductor nanocrystals of stannite Cu 2 FeSnS 4 /rhodostannite Cu 2 FeSn 3 S 8 (CFTS) via mechanochemical route using Cu, Fe, Sn and S elements as precursors in one-pot experiments. Methods of X-ray diffraction (XRD), nitrogen adsorption, high-resolution transmission electron microscopy (HRTEM), scanning transmission electron microscopy (STEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) were applied to characterize properties of the unique nanostructures. Mechanochemical route of synthesis induced new phenomena like explosive character of reaction, where three stages could be identified and the formation of nanostructures 5-10 nm in size. By using XPS method, Cu(I), Fe(II), Sn(IV) and S(-II) species were identified on the surface of CFTS. The value of optical band gap 1.27 eV is optimal for semiconductors applicable as absorbers in solar cells. The significant photocatalytic activity of the CFTS nanocrystals was also evidenced. The obtained results confirm the excellent properties of the quaternary semiconductor nanocrystals synthesized from earth-abundant elements.

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Efficient hydrogen/oxygen evolution and photocatalytic dye degradation and reduction of aqueous Cr(vi) by surfactant free hydrophilic Cu₂ZnSnS₄ nanoparticles

Abstract: Use of hydrophilic Cu2ZnSnS4 nanoparticles as a multifunctional highly active heterogeneous catalyst: electrocatalytic water splitting, photocatalytic dye degradation and reduction of aqueous Cr(vi).

Cited by 143 publications

References 43 publications

Earth‐Abundant Cu₂CoSnS₄ Nanofibers for Highly Efficient H₂ Evolution at Soft Interfaces

Earth‐Abundant Cu₂CoSnS₄ Nanofibers for Highly Efficient H₂ Evolution at Soft Interfaces

Dye‐Sensitized Cu₂XSnS₄ (X=Zn, Ni, Fe, Co, and Mn) Nanofibers for Efficient Photocatalytic Hydrogen Evolution

Chalcogenide Quaternary Cu2FeSnS4 Nanocrystals for Solar Cells: Explosive Character of Mechanochemical Synthesis and Environmental Challenge

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Efficient hydrogen/oxygen evolution and photocatalytic dye degradation and reduction of aqueous Cr(vi) by surfactant free hydrophilic Cu2ZnSnS4 nanoparticles

Abstract: Use of hydrophilic Cu2ZnSnS4 nanoparticles as a multifunctional highly active heterogeneous catalyst: electrocatalytic water splitting, photocatalytic dye degradation and reduction of aqueous Cr(vi).

Cited by 143 publications

References 43 publications

Earth‐Abundant Cu2CoSnS4 Nanofibers for Highly Efficient H2 Evolution at Soft Interfaces

Earth‐Abundant Cu2CoSnS4 Nanofibers for Highly Efficient H2 Evolution at Soft Interfaces

Dye‐Sensitized Cu2XSnS4 (X=Zn, Ni, Fe, Co, and Mn) Nanofibers for Efficient Photocatalytic Hydrogen Evolution

Chalcogenide Quaternary Cu2FeSnS4 Nanocrystals for Solar Cells: Explosive Character of Mechanochemical Synthesis and Environmental Challenge

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Efficient hydrogen/oxygen evolution and photocatalytic dye degradation and reduction of aqueous Cr(vi) by surfactant free hydrophilic Cu₂ZnSnS₄ nanoparticles

Earth‐Abundant Cu₂CoSnS₄ Nanofibers for Highly Efficient H₂ Evolution at Soft Interfaces

Earth‐Abundant Cu₂CoSnS₄ Nanofibers for Highly Efficient H₂ Evolution at Soft Interfaces

Dye‐Sensitized Cu₂XSnS₄ (X=Zn, Ni, Fe, Co, and Mn) Nanofibers for Efficient Photocatalytic Hydrogen Evolution