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The phase transformation of CuInS2 from chalcopyrite to wurtzite.

Xie BB, Hu BB, Jiang LF, Li G, Du ZL - Nanoscale Res Lett (2015)

Bottom Line: The phase transition of CuInS2 from chalcopyrite to wurtzite was realized by adjusting the pH value of reaction solution.The emergence of Cu2S in the condition of higher pH value of reaction solution led to the formation of wurtzite CuInS2.This facile method that controls the phase structure by adjusting the solution pH value could open a new way to synthesize other I-III-VI2 ternary semiconductor compounds.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, 475004 Henan People's Republic of China.

ABSTRACT
In the present work, CuInS2 nanoparticles have been successfully synthesized by water-bath method with deionized water as solvent and thioglycolic acid as complexing agent at 80°C. The phase transition of CuInS2 from chalcopyrite to wurtzite was realized by adjusting the pH value of reaction solution. The emergence of Cu2S in the condition of higher pH value of reaction solution led to the formation of wurtzite CuInS2. This facile method that controls the phase structure by adjusting the solution pH value could open a new way to synthesize other I-III-VI2 ternary semiconductor compounds.

No MeSH data available.


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XRD pattern of the as-synthesized CuInS2nanoparticles prepared at different pH values.
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Fig3: XRD pattern of the as-synthesized CuInS2nanoparticles prepared at different pH values.

Mentions: The influence of synthesis conditions on the crystal phase of products was studied by altering the pH value of reaction solution. Figure 3 shows the evolution of XRD patterns of the as-synthesized CuInS2 nanoparticles prepared with increasing pH values of reaction solution. It was found that the pH value of reaction solution played an important role in the determination of phase structure of the final product. As shown in Figure 3, when the pH value of the solution was 1.27, the chalcopyrite CuInS2 could be obtained. When the pH value of the solution increased to 5.3, the chalcopyrite CuInS2 transformed into wurtzite CuInS2. When the pH value of reaction solution is 10.3, the crystallization of the product is the best. Because of the Na2S shows very strong alkaline, the final reaction solution changed to alkaline solution when sufficient Na2S aqueous solution was added to the reaction solution with a pH value of 5.3.Figure 3


The phase transformation of CuInS2 from chalcopyrite to wurtzite.

Xie BB, Hu BB, Jiang LF, Li G, Du ZL - Nanoscale Res Lett (2015)

XRD pattern of the as-synthesized CuInS2nanoparticles prepared at different pH values.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385122&req=5

Fig3: XRD pattern of the as-synthesized CuInS2nanoparticles prepared at different pH values.
Mentions: The influence of synthesis conditions on the crystal phase of products was studied by altering the pH value of reaction solution. Figure 3 shows the evolution of XRD patterns of the as-synthesized CuInS2 nanoparticles prepared with increasing pH values of reaction solution. It was found that the pH value of reaction solution played an important role in the determination of phase structure of the final product. As shown in Figure 3, when the pH value of the solution was 1.27, the chalcopyrite CuInS2 could be obtained. When the pH value of the solution increased to 5.3, the chalcopyrite CuInS2 transformed into wurtzite CuInS2. When the pH value of reaction solution is 10.3, the crystallization of the product is the best. Because of the Na2S shows very strong alkaline, the final reaction solution changed to alkaline solution when sufficient Na2S aqueous solution was added to the reaction solution with a pH value of 5.3.Figure 3

Bottom Line: The phase transition of CuInS2 from chalcopyrite to wurtzite was realized by adjusting the pH value of reaction solution.The emergence of Cu2S in the condition of higher pH value of reaction solution led to the formation of wurtzite CuInS2.This facile method that controls the phase structure by adjusting the solution pH value could open a new way to synthesize other I-III-VI2 ternary semiconductor compounds.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, 475004 Henan People's Republic of China.

ABSTRACT
In the present work, CuInS2 nanoparticles have been successfully synthesized by water-bath method with deionized water as solvent and thioglycolic acid as complexing agent at 80°C. The phase transition of CuInS2 from chalcopyrite to wurtzite was realized by adjusting the pH value of reaction solution. The emergence of Cu2S in the condition of higher pH value of reaction solution led to the formation of wurtzite CuInS2. This facile method that controls the phase structure by adjusting the solution pH value could open a new way to synthesize other I-III-VI2 ternary semiconductor compounds.

No MeSH data available.


Related in: MedlinePlus