Thiourea complexes in synthesis of Cd1 − x Zn x S solid solutions

Наумов, А. В.; Samofalova, T. V.; Семенов, В. Н.; Nechaev, I. V.

doi:10.1134/s0036023611040218

Cited by 8 publications

(8 citation statements)

References 3 publications

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“…This implies that the Cd atoms in the ZnS crystal influence the positions of Zn atoms and consequently change the lattice structure of ZnS during the formation of the Zn 1– x Cd x S solid solutions under high-temperature treatment. This phenomenon is similar to the reported results in other literatures. ,, …”

Section: Results and Discussionsupporting

confidence: 93%

“…Zn 1– x Cd x S solid solutions were prepared by a simple zinc–cadmium–thiourea (Zn–Cd–Tu) complex thermolysis method using thiourea (Tu), zinc acetate dihydrate (Zn(Ac) 2 ·2H 2 O), and cadmium acetate dihydrate (Cd(Ac) 2 ·2H 2 O) as precursors. , All of the reagents were of analytical grade and were used without further purification. Deionized (DI) water was used in all experiments.…”

Section: Methodsmentioning

confidence: 99%

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Zn_1–xCd_xS Solid Solutions with Controlled Bandgap and Enhanced Visible-Light Photocatalytic H₂-Production Activity

et al. 2013

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Photocatalytic hydrogen (H 2 ) production from water splitting under visible-light irradiation is considered to be an attractive way to solve the increasing global energy crises in modern life. In this study, highly efficient photocatalytic H 2 production without the assistant of a cocatalyst was achieved using Zn1 1−x Cd x S solid solutions as the visible-light-driven photocatalysts and a mixed Na 2 S and Na 2 SO 3 aqueous solution as the sacrificial reagent. The Zn 1−x Cd x S samples were prepared by a simple zinc−cadmium− thiourea (Zn−Cd−Tu) complex thermolysis method using thiourea, zinc acetate (Zn(Ac) 2 ), and cadmium acetate (Cd(Ac) 2 ) as the precursors. The obtained Zn 1−x Cd x S solid solutions feature a small crystallite size and precisely controllable band structure, which are beneficial for the photocatalysis. When the Zn/Cd molar ratio is 1:1, the prepared Zn 0.5 Cd 0.5 S sample exhibits the highest H 2 -production rate of 7.42 mmol•h −1 •g −1 , exceeding that of the pure CdS and ZnS samples by more than 24 and 54 times, respectively, and even much higher than that of the optimal Pt-loaded CdS. This high photocatalytic H 2 -production activity is attributed predominantly to enough visible-light absorption capacity and suitable conduction band potential of the Zn 0.5 Cd 0.5 S solid solution, which is further evidenced from the related theory calculations on the band structures of the Zn 1−x Cd x S solid solutions. Moreover, the calculation on the Mulliken populations of Zn, Cd, and S atoms for the first time provides new insight into the deep understanding of the chemical shifts of element binding energies for the Zn 1−x Cd x S solid solutions and the designing of new ternary photocatalytic materials.

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Section: Results and Discussionsupporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Zn_1–xCd_xS Solid Solutions with Controlled Bandgap and Enhanced Visible-Light Photocatalytic H₂-Production Activity

et al. 2013

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“…[26] Naumov et al. have reported the synthesis of Cd 1‐x Zn x S thin films by aerosol pyrolysis of bis(thiourea)cadmium zinc chloride at 300 °C − 550 °C . In the present study, a series of bis(thiourea)cadmium‐zinc acetate complexes were prepared and a complete series of Cd 1‐x Zn x S solid solutions (x=0‐1) has been prepared by the thermal decomposition of the complexes.…”

Section: Resultsmentioning

confidence: 86%

“…Pre‐conditioned arrangement and availability of all the three ions (Cd 2+ , Zn 2+ and S 2− ) in a single molecule (i. e. complex) facilitates the formation of Cd 1‐x Zn x S nanoparticles. When the complex is subjected to thermal decomposition, it results in the release of Cd 2+ , Zn 2+ and S 2− ions . These ions react at high temperature (∼200 °C) to form Cd 1‐x Zn x S nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

“…Only a few authors have reported the synthesis of Cd 1‐x Zn x S nanoparticles using single molecular precursors (cadmium‐zinc bis(N,N‐diethyldithiocarbamate) and zinc−cadmium−thiourea complex) . The reported methods employ harsh synthetic conditions like high temperature (180 °C – 500 °C), long reaction time (3 h ‐ 12 h) and presence of an inert atmosphere is often required for the preparation of Cd 1‐x Zn x S nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Cd_1-xZn_xS (x=0-1) Nanoparticles by Thermal Decomposition of Bis(thiourea)cadmium-zinc acetate Complexes

Gaur

Jeevanandam

2016

ChemistrySelect

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The present study reports synthesis of a complete series of Cd1‐xZnxS solid solution nanoparticles (x=0‐1) via thermal decomposition of bis(thiourea)cadmium‐zinc acetate complexes. First, bis(thiourea)cadmium‐zinc acetate complexes were synthesized which were then decomposed at 200 °C for 1 h in diphenyl ether. The bis(thiourea)cadmium‐zinc acetate complexes and Cd1‐xZnxS nanoparticles were characterized using different analytical techniques. The crystallite size of Cd1‐xZnxS nanoparticles varies from 2.1 nm to 4.8 nm and the phase changes from hexagonal to cubic with an increase in zinc content. The optical properties of Cd1‐xZnxS solid solution nanoparticles depend on composition and the band gap varies from 2.37 eV to 3.69 eV with an increase in the concentration of zinc. Photoluminescence spectral studies indicate shift of excitonic emission peaks towards lower wavelength (465 nm – 503 nm) compared to pure CdS nanoparticles (505 nm) with increasing zinc content in the Cd1‐xZnxS nanoparticles. The Cd1‐xZnxS nanoparticles were explored as catalysts for the photodegradation of methylene blue in an aqueous solution under sunlight.

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Synthesis of Metal Chalcogenide Semiconductors by Thermal Decomposition of Organosulfur and Organoselenium Compounds

Obata

Higashi

Hasegawa

et al. 2022

Chemistry A European J

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Metal chalcogenides – because of their excellent optical and electrical properties – are important semiconductor materials for optical devices, such as solar cells, sensors, and photocatalysts. The challenges associated with metal chalcogenides are the complexity of the conventional synthesis methods and the stringent synthesis conditions. In this study, the synthesis conditions were simplified in a solvent‐free synthesis method using cadmium precursor, thiourea and selenium to synthesize metal chalcogenides, such as CdS and CdSe, which have particularly suitable band gaps for the optical devices. CdSxSe1‐x solid solution was successfully synthesized under molten thiourea as the reactive reaction medium at relatively low temperatures, even at 180 °C, with residual melamine derivatives in the solid phase. The luminescence properties of CdSxSe1‐x and the products in the gas and solid phases were investigated. Optimization of the synthesis conditions for solid solutions of CdSxSe1‐x and the role of organic compounds in the formation of metal chalcogenides are discussed.

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Thiourea complexes in synthesis of Cd1 − x Zn x S solid solutions

Cited by 8 publications

References 3 publications

Zn_1–xCd_xS Solid Solutions with Controlled Bandgap and Enhanced Visible-Light Photocatalytic H₂-Production Activity

Zn_1–xCd_xS Solid Solutions with Controlled Bandgap and Enhanced Visible-Light Photocatalytic H₂-Production Activity

Synthesis and Characterization of Cd_1-xZn_xS (x=0-1) Nanoparticles by Thermal Decomposition of Bis(thiourea)cadmium-zinc acetate Complexes

Synthesis of Metal Chalcogenide Semiconductors by Thermal Decomposition of Organosulfur and Organoselenium Compounds

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Thiourea complexes in synthesis of Cd1 − x Zn x S solid solutions

Cited by 8 publications

References 3 publications

Zn1–xCdxS Solid Solutions with Controlled Bandgap and Enhanced Visible-Light Photocatalytic H2-Production Activity

Zn1–xCdxS Solid Solutions with Controlled Bandgap and Enhanced Visible-Light Photocatalytic H2-Production Activity

Synthesis and Characterization of Cd1-xZnxS (x=0-1) Nanoparticles by Thermal Decomposition of Bis(thiourea)cadmium-zinc acetate Complexes

Synthesis of Metal Chalcogenide Semiconductors by Thermal Decomposition of Organosulfur and Organoselenium Compounds

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Zn_1–xCd_xS Solid Solutions with Controlled Bandgap and Enhanced Visible-Light Photocatalytic H₂-Production Activity

Zn_1–xCd_xS Solid Solutions with Controlled Bandgap and Enhanced Visible-Light Photocatalytic H₂-Production Activity

Synthesis and Characterization of Cd_1-xZn_xS (x=0-1) Nanoparticles by Thermal Decomposition of Bis(thiourea)cadmium-zinc acetate Complexes