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Ag/AgCl hollow composite microsphere as well as preparation method and application thereof

A composite microsphere and hollow technology, which is applied to the preparation of microspheres, microcapsule preparations, chemical instruments and methods, etc., can solve the problems of complex preparation process, time-consuming, difficult control of content and distribution, and achieve high photocatalytic activity and enhanced The effect of absorption and good application prospect

Active Publication Date: 2022-06-24
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can synthesize Ag / AgCl hollow structures, the preparation process is to first prepare hollow AgCl, and then use photoreduction method to reduce Ag nanoparticles, which is complicated and time-consuming.
In addition, the content and distribution of Ag are difficult to control during the photoreduction process, which affects the photocatalytic activity.

Method used

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  • Ag/AgCl hollow composite microsphere as well as preparation method and application thereof
  • Ag/AgCl hollow composite microsphere as well as preparation method and application thereof
  • Ag/AgCl hollow composite microsphere as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of Ag / AgCl hollow composite microspheres (see figure 1 ), which includes the following steps:

[0030] 1) Dissolve CuCl microspheres in ethanol, then add polyvinylpyrrolidone (PVP), and stir for 3 minutes to obtain a mixed solution; wherein, the mass ratio of CuCl microspheres to ethanol is 1:100, and the mass ratio of PVP to CuCl microspheres is 0.2:1;

[0031] 2) Add AgNO with a concentration of 0.1 mol / L to the mixture obtained in step 1). 3 solution (the AgNO 3 The solution is AgNO 3 Dissolved in 1 mL of deionized water and 10 mL of anhydrous ethanolic water), AgNO 3 The molar ratio of the added amount to CuCl was 0.5:1, and the reaction was stirred for 3 minutes, allowed to stand for 60 minutes, and then centrifuged, washed and dried.

[0032] The CuCl microspheres are prepared by the following method: 2 Add PVP to the aqueous solution and stir for 30 minutes to obtain a mixed solution. CuCl in the mixed solution 2 The molar concentratio...

Embodiment 2

[0035] A preparation method of Ag / AgCl hollow composite microspheres, which comprises the following steps:

[0036] 1) Dissolve CuCl microspheres in ethanol, then add polyvinylpyrrolidone (PVP), and stir for 4 minutes to obtain a mixed solution; wherein, the mass ratio of CuCl microspheres to ethanol is 1:100, and the mass ratio of PVP to CuCl microspheres is 0.5:1;

[0037] 2) Add AgNO with a concentration of 0.2 mol / L to the mixture obtained in step 1). 3 solution (the AgNO 3 The solution is AgNO 3 Dissolved in 2 mL of deionized water and 10 mL of anhydrous ethanolic water), AgNO 3 The molar ratio of the added amount to CuCl was 1:1, and the reaction was stirred for 3 minutes, allowed to stand for 50 minutes, and then centrifuged, washed, and dried.

[0038] The CuCl microspheres are prepared by the following method: 2 Add PVP to the aqueous solution and stir for 20 minutes to obtain a mixed solution. CuCl in the mixed solution 2 The molar concentration of 0.05 mol / L, ...

Embodiment 3

[0041] A preparation method of Ag / AgCl hollow composite microspheres, which comprises the following steps:

[0042] 1) Dissolve the CuCl microspheres in ethanol, then add polyvinylpyrrolidone (PVP), and stir for 5 minutes to obtain a mixture; the mass ratio of CuCl microspheres to ethanol is 1:100, and the mass ratio of PVP to CuCl microspheres is 0.5:1;

[0043] 2) Add AgNO with a concentration of 0.4 mol / L to the mixture obtained in step 1). 3 solution (the AgNO 3 The solution is AgNO 3 Dissolved in 3 mL of deionized water and 10 mL of anhydrous ethanolic water), AgNO 3 The molar ratio of the added amount to CuCl was 2:1, the reaction was stirred for 2 minutes, allowed to stand for 30 minutes, and then centrifuged, washed and dried.

[0044] The CuCl microspheres are prepared by the following method: 2 Add PVP to the aqueous solution and stir for 10 minutes to obtain a mixed solution. CuCl in the mixed solution 2 The molar concentration of 0.05 mol / L, PVP and CuCl 2 T...

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Abstract

The invention relates to a preparation method of Ag / AgCl hollow composite microspheres, which comprises the following steps: dissolving CuCl microspheres in ethanol, then adding polyvinylpyrrolidone (PVP), and stirring for 3-5 minutes to obtain a mixed solution; and adding an AgNO3 solution with the concentration of 0.05-0.5 mol / L into the obtained mixed solution, stirring and reacting for 1-3 minutes, standing for 15-60 minutes, and then centrifugally separating, washing and drying, thereby obtaining the product. The AgNO3 solution is obtained by dissolving AgNO3 in deionized water and absolute ethyl alcohol according to the volume ratio of (0.05-0.5): 1. The prepared hollow Ag / AgCl composite microsphere has a hollow structure, so that the hollow Ag / AgCl composite microsphere can better adsorb organic matters, and absorption of visible light is enhanced through multiple reflections of the hollow structure, so that the hollow Ag / AgCl composite microsphere has relatively high photocatalytic activity for degrading phenol, and has a very good application prospect in treatment of wastewater containing organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and in particular relates to a visible light catalyst Ag / AgCl hollow composite microsphere and a preparation method and application thereof. Background technique [0002] With the rapid development of industry, a large number of toxic organic pollutants are discharged into water bodies, destroying the ecological environment and seriously threatening human health. Therefore, the effective treatment of wastewater containing organic pollutants is imminent. As a green chemical technology, photocatalysis is becoming an effective way to use solar energy to solve serious environmental pollution problems. However, traditional semiconductor photocatalysts (such as TiO 2 etc.), due to its large band gap (3.2 eV), it can only absorb ultraviolet light, and it faces the problems of high recombination rate of photogenerated carriers and low solar energy utilization, which cannot meet the requirements ...

Claims

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Application Information

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IPC IPC(8): B01J27/10B01J35/08B01J13/02C02F1/30C02F101/34
CPCB01J27/10B01J13/02C02F1/30C02F2305/10C02F2101/345B01J35/51B01J35/39Y02W10/37
Inventor 娄世云陈青兰王永强周少敏陶小军
Owner HENAN UNIVERSITY