Highly active visible catalyst Ag / Cu2O hierarchy structural microsphere preparation method

A hierarchical structure, visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem that the photocatalytic effect cannot be effectively improved, the method is cumbersome, The problem of uncontrollable material structure, etc., can improve the photocatalytic performance, the preparation process and process are simple, and the price and cost are low.

Active Publication Date: 2015-12-09
砀山县胜华罐头食品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this category involves the Cu 2 The preparation method of O-noble metal composite materials is mainly prepared by multi-step reaction, the method is

Method used

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  • Highly active visible catalyst Ag / Cu2O hierarchy structural microsphere preparation method
  • Highly active visible catalyst Ag / Cu2O hierarchy structural microsphere preparation method
  • Highly active visible catalyst Ag / Cu2O hierarchy structural microsphere preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Highly Active Visible Light Catalyst Ag / Cu 2 O hierarchical structure microsphere preparation method, the method may further comprise the steps:

[0032] (1) Accurately weigh 0.3928g copper nitrate trihydrate (Cu(NO 3 ) 2 ·3H 2 O), 0.0428g silver nitrate (AgNO 3- ) and 0.2g of polyvinylpyrrolidone (PVP), which were dispersed in a beaker containing 30mL of ethylene glycol, and fully dissolved under the action of magnetic stirring to form a clear and transparent blue solution.

[0033] (2) Transfer the above clear and transparent blue solution to a 40mL polytetrafluoroethylene-lined autoclave, heat at a constant temperature in an oven at 180°C for 1 hour, and cool to room temperature naturally after the reaction is complete.

[0034] (3) Take out the black precipitated product at the bottom of the polytetrafluoroethylene inner substrate, wash with deionized water and absolute ethanol three times each, to obtain a black solid powder.

[0035] (4) The above black solid...

Embodiment 2

[0038] The difference from the preparation method in Example 1 is that the constant temperature heating time in an oven at 180° C. is changed to 2 hours and 3 hours respectively, and other conditions are the same as in Example 1. Such as Figure 4 and Figure 5 As shown, the reaction time is 2h and 3h, and microspheres with micro-nano hierarchical structure cannot be obtained. Such as Figure 6 and Figure 7 As shown, from the XRD analysis results of the obtained samples, it can be seen that the components in the two samples contain the phase of the Cu structure, indicating that in the preparation of Ag / Cu 2 In the process of micro-nano hierarchical structure microspheres, the material required by the application cannot be synthesized when the constant temperature heating time is 2h or more in an oven at 180°C.

Embodiment 3

[0040] The difference with the preparation method of Example 1 is that the silver nitrate AgNO is changed 3- Consumption is respectively 0.0639g and 0.0850g, and other conditions are identical with embodiment 1. Such as Figure 8 and Figure 9 As shown, when AgNO 3 Consumption is 0.0639g and 0.0850g, all can not obtain the micro-nano hierarchical structure microsphere with uniform appearance; Figure 10 and Figure 11 As shown, it can be seen from the XRD analysis results of the obtained sample that the components in the sample contain a Cu-structured phase. Explain that in the present invention in order to prepare Ag / Cu with uniform morphology 2 O micro-nano hierarchical structure microspheres, and the composition does not contain other impurities, the silver nitrate AgNO used 3- The dosage must be within the set value range.

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Abstract

The present invention discloses a highly active visible catalyst Ag / Cu2O hierarchy structural microsphere preparation method which comprises the following steps: accurately trihydrate copper nitrate, silver nitrate and polyvinylpyrrolidone are weighed and dispersed in a container containing ethylene glycol, and are fully dissolved under magnetic stirring action to form a clear transparent blue solution; the resulting solution is transferred to an autoclave for heating at constant temperature, and the solution is cooled to room temperature after completion of the reaction; an autoclave bottom black precipitated product is taken out, and washed with deionized water ethanol to obtain black solid powder, and the black solid powder is placed in a vacuum drying oven and dried to constant weight. A simple green solvent thermal method is used, the method is easy to operate, free of impurities, available in raw materials, low in cost, low in reaction temperature, and almost free of pollution, the product is easy to separate, high in purity, uniform in morphology, methyl orange dye molecule degradation rate within 40min is more than 98%, and after recycling for five times, the degradation rate is kept more than 95%.

Description

technical field [0001] The invention relates to a preparation method of an inorganic functional micro-nano structure material, in particular to a highly active visible light catalyst Ag / Cu 2 O Hierarchical microsphere preparation method. Background technique [0002] As a very important direct bandgap (bandgap width 2.0-2.22) p-type semiconductor, Cu 2 O has unique optical and electrical properties, and it has a wide range of applications in the fields of visible light catalysis, solar energy conversion, and gas sensors. Pure Cu 2 The actual photocatalytic efficiency of O is not high, and it is not an ideal photocatalyst material. The main reason for this is that the photogenerated electrons cannot be effectively transferred, which leads to the easy electron-hole recombination. In order to overcome such shortcomings, the Cu 2 O is one of the effective methods for surface modification of noble metal nanoparticles. In recent years, the semiconductor-noble metal heterojun...

Claims

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Application Information

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IPC IPC(8): B01J23/89C02F1/30C02F1/58
Inventor 张永兴周祥博刘忠良李德川刘亲壮李兵刘强春朱光平
Owner 砀山县胜华罐头食品有限公司
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