Method of preparing cuprous oxide rhombic dodecahedron and low-temperature reduction reaction

A rhombic dodecahedron and cuprous oxide technology, applied in the field of nanomaterials, can solve the problems of difficulty in the rhombic dodecahedron technology, and achieve the effects of cheap raw materials, simple production equipment, and easy availability of raw materials

Inactive Publication Date: 2009-10-07
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far no Cu 2 Report of O rhombic dodecahedron, which is surrounded by 12 congruent (110) crystal faces
Since the (110) crystal plane is difficult to completely retain during the growth of the crystal, the preparation of Cu 2 O rhombic dodecahedron is technically difficult

Method used

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  • Method of preparing cuprous oxide rhombic dodecahedron and low-temperature reduction reaction
  • Method of preparing cuprous oxide rhombic dodecahedron and low-temperature reduction reaction
  • Method of preparing cuprous oxide rhombic dodecahedron and low-temperature reduction reaction

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Experimental program
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Effect test

Embodiment 1

[0019] Example 1 The low-temperature preparation steps for preparing cuprous oxide rhombic dodecahedron at low temperature are as follows:

[0020] ① Add CuSO 4 ·5H 2 O was dissolved in deionized water to form a transparent solution with a concentration of 0.025mol / L, then oleic acid and absolute ethanol were added to the transparent solution and stirred thoroughly, and the amounts of oleic acid and absolute ethanol were respectively 4mL and 20mL;

[0021] ②The preparation of step ① containing oleic acid, ethanol and CuSO 4 ·5H 2 After fully stirring the deionized solution of O, heat it to 100°C, and then add a NaOH solution with a concentration of 0.8mol / L and a volume of 10mL for reaction to make it fully react.

[0022] ③ Add 3.42 g of glucose to the fully reacted solution in step ② for reaction, and the reaction time is 20 minutes to form a precipitate. Disperse the precipitate from the solution, wash it in ethanol and cyclohexane for 3-7 times respectively, and finall...

Embodiment 2

[0024] Add 3.42 g of glucose to the fully reacted NaOH mixed solution prepared in step ② for reaction, and the reaction time is 30 minutes to form a precipitate. Disperse the precipitate from the solution, wash it several times in ethanol and cyclohexane, and finally dry it in a vacuum electric furnace at 60°C to obtain rhombohedral cuprous oxide powder. The rhombic dodecahedron surface smoothness and size uniformity that obtains all increase to some extent than example 1, but dispersibility is relatively poor (see figure 2 ). The technological process of step 1. and 2. is with embodiment 1.

Embodiment 3

[0026] Add 3.42g of glucose to the fully reacted NaOH mixed solution prepared in step ② for reaction, and the reaction time is 60 minutes to form a precipitate. Disperse the precipitate from the solution, wash it several times in ethanol and cyclohexane, and finally dry it in a vacuum electric furnace at 60°C to obtain rhombohedral cuprous oxide powder. The surface of the obtained rhombic dodecahedron is smooth, regular in shape, uniform in size and good in dispersion (see image 3 ). Figure 4 It is the X-ray diffraction pattern of the powder prepared in this embodiment, and the diffraction peaks in the spectrum correspond to the crystal plane diffraction peaks of (110), (111), (200), (220), (311), and (222) successively. It can be seen that The obtained powder is cubic phase Cu 2 O. The technological process of step 1. and 2. is identical with embodiment 1.

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Abstract

The invention provides a method of preparing cuprous oxide rhombic dodecahedron and low-temperature reduction reaction; the method is characterized by taking blue vitriod as copper source, taking glucose as surfactant, using mixed solvents of water and ethanol, and using sodium hydroxide to cause the whole solvent to keep alkalinity, carrying out reduction reaction under 60 to 120 degrees centigrade to obtain the cuprous oxide rhombic dodecahedron. The produced cuprous oxide rhombic dodecahedron has high photocatalytic activity. In the past, various methods are used to prepare cuprous oxide nanometer / micrometer cubes and octahedral, but the invention prepares the cuprous oxide rhombic dodecahedron formed by 12 congruent (110) crystal faces; and the method provided by the invention has simple processing equipment, low production cost and is suitable for commercial production.

Description

technical field [0001] The invention relates to a cuprous oxide rhombic dodecahedron and a preparation method for a low-temperature reduction reaction, which can be used for photocatalysis, gas sensitivity, solar cells, etc., and belongs to the field of nanometer materials. Background technique [0002] In recent years, nano / micro polyhedra have been one of the hotspots in material science research, especially in the field of catalysis, because they are often surrounded by highly active crystal faces, which will greatly promote catalysis. Cuprous oxide has been widely studied as a catalytic material due to its non-toxicity and low cost. [0003] The existing cuprous oxide polyhedra are mainly cubes and octahedrons. A cube is surrounded by six {100}, and an octahedron is surrounded by eight {111}. Their preparation is mostly done in aqueous solution with the assistance of surfactants. Initially, Murphy et al. used cetyltrimethylammonium bromide as a surfactant to reduce co...

Claims

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Application Information

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IPC IPC(8): C01G3/02
Inventor 高濂梁旭东
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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