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Shape controllable synthesis method of cuprous oxide powder and application

A technology of cuprous oxide and synthesis method, which is applied in chemical instruments and methods, copper oxide/copper hydroxide, oxidized water/sewage treatment, etc., to achieve the effect of excellent visible light catalytic performance

Inactive Publication Date: 2019-03-19
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of gelatin to the controllable preparation of cuprous oxide has not been reported so far.

Method used

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  • Shape controllable synthesis method of cuprous oxide powder and application
  • Shape controllable synthesis method of cuprous oxide powder and application
  • Shape controllable synthesis method of cuprous oxide powder and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Option 1: Add 0.005mol of CuSO 4 ·5H 2 O and 0.005mol of tartaric acid were mixed and added to 80mL of deionized water, and after dissolving, 0.5g of NaOH was added to the above solution to obtain a dark blue solution. Then, the dark blue solution was transferred into a reaction kettle and reacted in an oven at 120° C. for 3 h.

[0023] Scheme 2: Add 0.005mol of CuSO 4 ·5H 2 O and 0.005mol of tartaric acid were mixed and added to 80mL of deionized water, and after dissolving, 0.5g of NaOH was added to the above solution to obtain a dark blue solution. Next, 1.5 g of gelatin was added to the reaction system, heated and dissolved to obtain a dark blue colloidal solution. Finally, the dark blue colloidal solution was transferred into a reaction kettle and reacted in an oven at 120° C. for 3 h.

[0024] The morphological characterization of the product prepared in embodiment 1:

[0025] 1. SEM analysis

[0026] It is well known that the morphology of powder particles...

Embodiment 2

[0030] In order to investigate the effect of tartaric acid usage on Cu 2 The influence of O powder form, preparation condition is the same as embodiment 1, and difference only is that the addition amount of tartaric acid is adjusted to 0.002mol, 0.02mol respectively, and the prepared product is carried out morphological observation, and its result is as follows image 3 shown. The systematic research shows that the amount of tartaric acid in the reaction system has a great influence on the purity and form of the product. When the amount of tartaric acid used is small (0.002mol), there is a small amount of Cu in the product 2 O phase appears ( image 3 shown in a). This is easy to understand, because tartaric acid is a reducing agent, its amount is small, and the reduction reaction is not complete. And when the amount of tartaric acid used was too high (0.02mol), the resulting Cu 2 O is irregular ( image 3 shown in b). Therefore, when the amount of tartaric acid used is...

Embodiment 3

[0032] In order to investigate the effect of the amount of gelatin template usage on Cu 2 The influence of O powder form, preparation condition is the same as embodiment 1, and difference only is that the addition amount of gelatin is adjusted to 0.5g, 2g respectively, then the prepared product is carried out morphological observation, and its result is as follows Figure 4 shown. A series of experimental studies also concluded that the amount of gelatin used mainly affects the shape of the product. When other conditions are the same, spherical Cu 2 O product, when using less (0.5g) (see Figure 4 a), obtained Cu 2 O sphericity is low, and when using too high (2g), there will be gelatin residue in the product (see Figure 4 b). Therefore, the amount of gelatin used for template assembly must also be controlled within a certain range, preferably 1.5 g.

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Abstract

The invention provides a shape controllable synthesis method of cuprous oxide powder and application and relates to the technical field of preparation and application of cuprous oxide. The method comprises the following steps: directly carrying out hydrothermal reaction in an alkaline copper tartrate water system composed of copper sulfate, alkali liquid and tartaric acid; when Cu<2+> in copper tartrate is heated, reducing the Cu<2+> and slowly releasing Cu<+>; combining the Cu<+> and OH<-> in the system to form CuOH; dehydrating the CuOH to form Cu2O small crystal grains; finally, forming Cu2O cubes through the single-crystal CuOH through an Ostwald ripening manner; or introducing a proper amount of gelatin with a template effect into the alkaline copper tartrate water system; and carrying out the hydrothermal reaction to assemble a plurality of formed nanoparticles into microspheres. The maximum absorption wavelength of the prepared Cu2O powder with two shapes is about 500nm (with the band gap of about 2.2eV); and the Cu2O powder can be used for removing organic pollutants in a water body and the photocatalytic performance of spherical powder is better than that of cubic powder.

Description

technical field [0001] The invention relates to the technical field of preparation and application of cuprous oxide, in particular to a method for synthesizing cuprous oxide powder with controllable morphology and its application. Background technique [0002] Cuprous oxide (Cu 2 O) has good visible light absorption characteristics, is a common visible light catalyst, and can be used as a preservative, bactericide, colorant and catalyst. Generally, different forms of Cu can be obtained by reduction reaction using ordinary copper salt as raw material under the action of reducing agents such as glucose, ascorbic acid, fructose, hydrazine hydrate, sodium borohydride and polyols. 2 O nanomaterials. In order to get regular Cu 2 For O nanocrystals, templates and surfactants such as polyvinylpyrrolidone (PVP) and cetyl ammonium bromide (CTAB) are often used in the reaction system. However, some of these reducing agents and additives that have been used have certain toxicity to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02B01J23/72B01J35/08C02F1/30C02F1/72B82Y30/00B82Y40/00C02F101/30
CPCB82Y30/00B82Y40/00C01G3/02C02F1/30C02F1/725B01J23/72C01P2004/32C01P2004/03C01P2002/84C01P2002/72C02F2101/308C02F2305/10C01P2004/62B01J35/51
Inventor 徐泽忠杨昌林廖凯韩成良
Owner HEFEI UNIV
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