Ethylenediamine-Mediated Wurtzite Phase Formation in ZnS

Acharya, S. A.; Maheshwari, Neeraj; Tatikondewar, Laxman; Kshirsagar, Anjali; Kulkarni, Sulabha K.

doi:10.1021/cg301173k

Cited by 94 publications

(47 citation statements)

References 75 publications

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“…This might be indicative for the precipitation of both ZnS modifications, zinc blende and wurtzite, under this reaction conditions. This observation is in accordance with the XRD results and with previous reports pointing out, that ZnS nanoparticles in sphalerite and wurtzite structure types can be obtained simultaneously in a low temperature synthesis process , …”

Section: Resultssupporting

confidence: 93%

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Synthesis of Metal Sulfides from a Deep Eutectic Solvent Precursor (DESP)

Zhang

Doert

Ruck

2017

Zeitschrift anorg allge chemie

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Abstract. Recently, deep eutectic solvents (DESs) have received great interest as sustainable reaction media for nanoscale and functional materials. We report on a new choline chloride (ChCl) and thioacetamide (TAA) based DES for the synthesis of a series of binary metal sulfides including Sb 2 S 3 , Bi 2 S 3 , PbS, CuS, Ag 2 S, ZnS, and CdS. In these reactions, the ChCl/TAA based DES serves as "all-in-one" reactant, solvent, and template or deep eutectic solvent precursor (DESP). The reaction is supposed to proceed in two steps. A metal-DES complex is first generated by adding the respective metal salts to the DES solu-

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Section: Resultssupporting

confidence: 93%

“…As is well known, ZnS exists in two modifications, the cubic zinc blende (sphalerite) and the hexagonal wurtzite structure type . Both forms comprise Zn and S atoms in tetrahedral coordination, while the stacking sequence of atomic layers is different.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Metal Sulfides from a Deep Eutectic Solvent Precursor (DESP)

Zhang

Doert

Ruck

2017

Zeitschrift anorg allge chemie

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“…[18][19][20] The results from X-ray diffraction (XRD) and transmission electron microscopy (TEM) experiments showed that the morphology and dimension of the ZnS Qdots remained unaltered following complexation reaction with CuQ 2 (SI, Figure S5-7). 25 Further, Fourier transform infrared spectroscopic (FTIR) measurements of the QDC indicated the presence of octahedral MQ 2 (M=Zn or Cu) complexes on the surface of Qdots (refer to SI, Figure S8). [17][18][19][20] Atomic absorption spectroscopic (AAS) measurements indicated the incorporation of small amount of Cu 2+ ions (2.2 mol %) in Qdot (which may be in the form of CuS or CuQ 2 ), following complexation reaction with CuQ 2 , while there was no significant change in the Zn 2+ concentration (SI , Table S4).…”

Section: Resultsmentioning

confidence: 99%

Quantum Dot Surface Mediated Unprecedented Reaction of Zn²⁺ and Copper Quinolate Complex

2015

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We report the reaction between Zn 2+ ions, being present on the surface of ZnS quantum dot (Qdot), and copper(II)-bis(8-hydroxyquinoline) (copper quinolate; CuQ 2 ) complex, leading to the formation of luminescent ZnQ 2 on the surface. This is contrary to the reactivity of copper complex based on Irving-William series in the liquid medium and thus indicating catalytic role of the Qdot surface. The rate of the reaction was observed to be first order with respect to the concentrations of both the reactants, with activation energy measured to be 74.3 kJ mol -1 .Further, the reaction of the Zn 2+ ions on the Qdot was observed to be fastest with HQ, slower with MnQ 2 and slowest with CuQ 2 , all leading to the formation of ZnQ 2 on the surface of the Qdot. The enhanced stability of the product complex on the surface, in the presence of dangling sulphide ions, indicated a new type of chemical reaction deserving special attention.

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“…ZnS samples with different sphalerite-wurtzite ratios were fabricated via modified hydrothermal processes with the ZnS(EN) 0.5 (EN=ethylenediamine) precursor 30,39 . The ZnS(EN) 0.5 is prepared by a solvothermal reaction of Zn 2+ with thiourea in ethylenediamine medium at 160 ºC.…”

Section: Experimental Synthesismentioning

confidence: 99%

Defect Engineering and Phase Junction Architecture of Wide-Bandgap ZnS for Conflicting Visible Light Activity in Photocatalytic H₂ Evolution

Fang

Weng

et al. 2015

ACS Appl. Mater. Interfaces

199

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ZnS is among the superior photocatalysts for H2 evolution, whereas the wide bandgap restricts its performance to only UV region. Herein, defect engineering and phase junction architecture from a controllable phase transformation enable ZnS to achieve the conflicting visible-light-driven activities for H2 evolution. On the basis of first-principle density functional theory calculations, electron spin resonance and photoluminescence results, etc., it is initially proposed that the regulated sulfur vacancies in wurtzite phase of ZnS play the key role of photosensitization units for charge generation in visible light and active sites for effective electron utilization. The symbiotic sphalerite-wurtzite phase junctions that dominate the charge-transfer kinetics for photoexciton separation are the indispensable configuration in the present systems. Neither ZnS samples without phase junction nor those without enough sulfur vacancies conduct visible-light photocatalytic H2 evolution, while the one with optimized phase junctions and maximum sulfur vacancies shows considerable photocatalytic activity. This work will not only contribute to the realization of visible light photocatalysis for wide-bandgap semiconductors but also broaden the vision on the design of highly efficient transition metal sulfide photocatalysts.

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Ethylenediamine-Mediated Wurtzite Phase Formation in ZnS

Cited by 94 publications

References 75 publications

Synthesis of Metal Sulfides from a Deep Eutectic Solvent Precursor (DESP)

Synthesis of Metal Sulfides from a Deep Eutectic Solvent Precursor (DESP)

Quantum Dot Surface Mediated Unprecedented Reaction of Zn²⁺ and Copper Quinolate Complex

Defect Engineering and Phase Junction Architecture of Wide-Bandgap ZnS for Conflicting Visible Light Activity in Photocatalytic H₂ Evolution

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Ethylenediamine-Mediated Wurtzite Phase Formation in ZnS

Cited by 94 publications

References 75 publications

Synthesis of Metal Sulfides from a Deep Eutectic Solvent Precursor (DESP)

Synthesis of Metal Sulfides from a Deep Eutectic Solvent Precursor (DESP)

Quantum Dot Surface Mediated Unprecedented Reaction of Zn2+ and Copper Quinolate Complex

Defect Engineering and Phase Junction Architecture of Wide-Bandgap ZnS for Conflicting Visible Light Activity in Photocatalytic H2 Evolution

Contact Info

Product

Resources

About

Quantum Dot Surface Mediated Unprecedented Reaction of Zn²⁺ and Copper Quinolate Complex

Defect Engineering and Phase Junction Architecture of Wide-Bandgap ZnS for Conflicting Visible Light Activity in Photocatalytic H₂ Evolution