Method of synthesizing copper selenide powder
AssigneeNational Cheng Kung University
InventorsHsing-I Hsiang, Chang-Ting Yang, Jui-Huan Tu, Juu-En Chang
Life of this patent
Estimating the term…
Abstract
This present invention relates to a method of synthesizing copper selenide powder chemical by using a hot-injection method wherein a proper amount of a. reducing agent is added to a mixed solution made of copper cationic solution and selenium anionic solution, and the mixed solution is maintained at a temperature of 230° C. for 40 minutes to obtain Copper Selenide powder. The Copper selenide powder which is in the form of CuSe or Cu2-xSe, can be synthesized by adjusting the amount of the reducing agent being added to the mixed solution.
Claims3
1-4. (canceled)
A method of synthesizing copper selenide powder, which comprises:
- putting an amount of selenium powder and PVP into a three-neck flask containing TEG to form a first TEG solution, and maintaining the first TEG solution at a temperature of 230° C. for 1 hour;
- putting an amount of copper (II) acetate into a container having TEG to form a second TEG solution, and maintaining the second TEG solution at a temperature of 100° C. for 1 hour, wherein the amount of the copper (II) acetate is prepared such that the molar ratio of copper to selenium is about 1:4;
- injecting the second TEG solution into the three-neck flask containing the first TEG solution to obtain a reaction solution, which is added with TETA and maintained at a temperature of 230° C. for 40 minutes and then cooled down to a temperature of 60° C.;
- adding ethanol to terminate reaction in the reaction solution;
- removing water from the reaction solution by centrifugal force to obtain copper selenide powder;
- and
- washing the copper selenide powder by ethanol;
- wherein the copper selenide powder is in a crystalline form of CuSe when a smaller amount of the TETA is added to the reaction solution;
- the copper selenide powder is in a crystalline form of Cu2-xSe when a larger amount of the TETA is added to the reaction solution.
Dependencies are inferred from the claim text.