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Preparation method of flower-like ag@agbr/zno photocatalytic material

A photocatalytic material and flower-like technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as unsuitable production efficiency, long preparation time, complex and cumbersome process, etc., to achieve The effect of reducing the difficulty of preparation, saving costs, and strong photocatalytic activity

Active Publication Date: 2020-11-27
HARBIN UNIV OF COMMERCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The purpose of the present invention is to solve the existing Ag@AgBr / ZnO photocatalytic material preparation method of expensive raw materials, complex and cumbersome process, long preparation time, production efficiency is not suitable for batch production, and the photocatalytic activity of photocatalyst is relatively low. In order to solve the poor problem, a preparation method of flower-like Ag@AgBr / ZnO photocatalytic material is provided

Method used

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  • Preparation method of flower-like ag@agbr/zno photocatalytic material
  • Preparation method of flower-like ag@agbr/zno photocatalytic material

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specific Embodiment approach 1

[0035] Specific implementation mode 1: In this implementation mode, the preparation method of the flower-shaped Ag@AgBr / ZnO material photocatalytic material is carried out according to the following steps:

[0036] 1. Weigh zinc acetate dihydrate, silver nitrate, and hexamethylenetetramine according to the ratio of Zn element, Ag element, hexamethylenetetramine and surfactant in the ratio of 1:0.2:1:0.55. Amine and CTAB, configure 0.3333mol / L and 0.1833mol / L of Zn source and surfactant in 30mL distilled water to obtain Zn source solution; configure 0.1mol / L and 0.5mol / L of Ag source and hexamethylene tetra Amine in 20mL distilled water, and add oxidant, Ag source solution;

[0037] 2. Add the Ag source solution drop by drop to the Zn source solution at a rate of 1 second / drop, transfer the mixed solution to a high-pressure reactor for hydrothermal reaction, the mixed solution accounts for about 50% of the reactor volume, set The water heating temperature is 140°C, and the wat...

specific Embodiment approach 2

[0044] 1. Weigh zinc acetate dihydrate, silver nitrate, and hexamethylenetetramine according to the ratio of Zn element, Ag element, hexamethylenetetramine and surfactant in the ratio of 1:0.2:1:0.55. Amine and CTAB, configure 0.3333mol / L and 0.1833mol / L of Zn source and surfactant in 30mL distilled water to obtain Zn source solution; configure 0.1mol / L and 0.5mol / L of Ag source and hexamethylene tetra Amine in 20mL distilled water, and add oxidant, Ag source solution;

[0045] 2. Add the Ag source solution drop by drop to the Zn source solution at a rate of 3 seconds / drop, transfer the mixed solution to a high-pressure reactor for hydrothermal reaction, the mixed solution accounts for about 50% of the reactor volume, set The water heating temperature is 160°C, and the water heating time is maintained at this temperature for 2.5 hours;

[0046] 3. After the resultant was washed with water, washed with alcohol and dried, it was transferred into a muffle furnace, calcined at 50...

specific Embodiment approach 3

[0048] 1. Weigh zinc acetate dihydrate, silver nitrate, and hexamethylenetetramine according to the ratio of Zn element, Ag element, hexamethylenetetramine and surfactant in the ratio of 1:0.2:1:0.55. Amine and CTAB, configure 0.3333mol / L and 0.1833mol / L of Zn source and surfactant in 30mL distilled water to obtain Zn source solution; configure 0.1mol / L and 0.5mol / L of Ag source and hexamethylene tetra Amine in 20mL distilled water, and add oxidant, Ag source solution;

[0049] 2. Add the Ag source solution drop by drop to the Zn source solution at a rate of 2 seconds / drop, transfer the mixed solution to the high-pressure reactor for hydrothermal reaction, the mixed solution accounts for about 50% of the reactor volume, set The water heating temperature is 130°C, and the water heating time is maintained at this temperature for 4 hours;

[0050] 3. After the product was washed with water, washed with alcohol and dried, it was transferred into a muffle furnace, calcined at 700°...

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Abstract

The invention discloses a preparation method of flower-like Ag@AgBr / ZnO photocatalytic material, and belongs to the field of nanomaterial preparation. The method adopts the following steps: 1) Configuring a certain concentration of surfactant and Zn source as a Zn source solution; Configuring a certain concentration of hexamethylenetetramine and Ag source as an Ag source solution; 2) Adding to the Ag source solution Add the oxidizing agent and add it dropwise to the Zn source solution at a certain rate; 3) Transfer the mixed solution to a high-pressure reactor, and perform a hydrothermal reaction at a certain temperature and for a certain time; 4) Wash the product with water, alcohol, and dry it Afterwards, it is calcined in air and cooled to room temperature to obtain a flower-like Ag@AgBr / ZnO photocatalytic material. The synthesis method adopted by the present invention has a simple process, easy operation and no secondary pollution. The synthesized photocatalytic material has the characteristics of uniform morphology and excellent performance. The work of the present invention belongs to the field of photocatalytic materials.

Description

technical field [0001] The invention relates to a preparation method of a flower-shaped Ag@AgBr / ZnO photocatalytic material. Background technique [0002] ZnO is a semiconductor catalyst widely used in photocatalytic oxidation technology. It has excellent photocatalytic activity, stable chemical properties and high quantum yield. Therefore, ZnO has high application value in sewage treatment and other directions. However, ZnO is a wide-bandgap semiconductor material, which can only stimulate photocatalytic oxidation reactions by ultraviolet light, and the utilization rate of sunlight is only 4%. Quick question. These shortcomings limit its practical application. In order to solve these defects of ZnO, a series of attempts have been made. The study found that the Ag@AgBr plasmonic catalyst, due to the plasmon resonance effect of Ag nanoparticles produced by the decomposition of AgBr in the system, Ag@AgBr can respond to visible light for photocatalytic oxidation process, bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/138B01J35/02B01J35/00
CPCB01J27/138B01J35/40B01J35/39
Inventor 谭冲李俊生刘颖杰夏至左金龙刘昊
Owner HARBIN UNIV OF COMMERCE
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