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Preparation method and application of a surface-mounted linear silver photocatalyst

A catalyst and assembly line technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve high catalytic activity, accelerated oxidation decomposition rate, and simple and easy preparation methods

Inactive Publication Date: 2016-01-06
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium dioxide only responds to ultraviolet rays. In order to maximize the use of 43% of the visible light in sunlight, people expect to develop more efficient visible light-responsive photocatalysts.

Method used

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  • Preparation method and application of a surface-mounted linear silver photocatalyst
  • Preparation method and application of a surface-mounted linear silver photocatalyst
  • Preparation method and application of a surface-mounted linear silver photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] At room temperature, take 30mL of water, pour it into a beaker, add 0.05g of copper micron wire (the molar number of copper element is 0.7874mmol) under stirring conditions, then add 0.1575g (1.092mmol) of urotropine, 0.8g (0.016mmol) polyvinylpyrrolidone (K-30, Sinopharm Chemical Reagent Co., Ltd.), and ultrasonically oscillated to uniformly disperse elemental copper in the system to obtain a copper dispersion.

[0020] Pour 10ml of silver nitrate aqueous solution (0.1872mol / L) with a concentration of 3.08% by mass into the copper dispersion at one time to carry out a displacement reaction at a temperature of 10°C. When the solution turned black gray, the reaction was completed, and the precipitate was collected by centrifugation, washed, dried at 50°C for 5h, and then calcined at 450°C for 2h to obtain material 1. X-ray electron diffraction image from material 1 ( Figure 4 ) It can be seen that material 1 is pure phase silver. From the electron microscopy (SEM) top...

Embodiment 2

[0022] At room temperature, take 30mL of water, pour it into a beaker, add 0.0396g of copper micron wire (the molar number of copper is 0.6236mmol) under stirring conditions, then add 0.1731g (0.0012mol) of urotropine, 0.9g (0.018mmol) polyvinylpyrrolidone (K-30, Sinopharm Chemical Reagent Co., Ltd.), and ultrasonically oscillated to disperse elemental copper in the system uniformly to obtain a copper dispersion.

[0023] Pour 10ml of silver nitrate solution (0.1872mol / L) with a concentration of 3.08% by mass into the copper dispersion at one time to carry out the displacement reaction, and the reaction temperature is 15°C. When the solution turned black gray, the reaction was completed, and the precipitate was collected by centrifugation, washed, dried at 70°C for 1 hour, and then calcined at 500°C for 1 hour to obtain material 2. From the X-ray electron diffraction image (XRD) of material 2, it can be seen that material 2 is pure phase silver. From the electron microscope (...

Embodiment 3

[0025] At room temperature, take 30mL of water, pour it into a beaker, add 0.1189g of copper micron wire (the molar number of copper is 1.87mmol) under stirring conditions, then add 0.0865g (0.5998mmol) of urotropine, 0.6g (0.012mmol) polyvinylpyrrolidone (K-30), and ultrasonically oscillate to disperse the elemental copper in the system uniformly to obtain a copper dispersion.

[0026] Pour 10ml of silver nitrate solution (0.1872mol / L) with a concentration of 3.08% by mass into the copper dispersion at one time to carry out a displacement reaction at a temperature of 20°C. When the solution turned black gray, the reaction was completed, and the precipitate was collected by centrifugation, washed, dried at 60°C for 3 hours, and roasted at 400°C for 3 hours to obtain material 3. From the X-ray electron diffraction image (XRD) of material 3, it can be seen that material 3 is pure phase silver. From the electron microscope (SEM) topography of material 3, it can be seen that line...

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Abstract

The invention provides a preparation method and application of a surface-loaded linear silver photocatalyst, relating to the field of novel catalysts. The preparation method comprises the following steps of sequentially adding a copper microwire, hexamethylenetetramine and polyvinylpyrrolidone into water, and performing ultrasonic oscillation to obtain copper dispersion liquid; adding a silver nitrate aqueous solution into the copper dispersion liquid for displacement reaction; performing centrifugation after the reaction, extracting precipitates, and performing washing, drying and roasting to obtain the surface-loaded linear silver photocatalyst. The preparation method is simple and easy; heating is not required, so that energy resources are saved; the prepared photocatalyst is novel in texture and high in photocatalysis activity, is linearly loaded on the surface of the copper microwire, and can be applied to the degradation of organic pollutants.

Description

technical field [0001] The invention relates to the field of novel catalysts, in particular to a method for preparing a surface-mounted linear silver catalyst and its application. Background technique [0002] In the study of photocatalysis, in 1972, Japanese scientist Fujishima et al. discovered that TiO 2 Single crystal electrodes can realize photocatalytic water splitting (Fujishima, 1972), and later discovered nano-TiO 2 It has the ability to photocatalytically degrade organic matter, and has outstanding advantages such as high stability, non-toxicity and pollution-free, and has been extensively and deeply studied in the field of photocatalysis. However, titanium dioxide only responds to ultraviolet light. In order to maximize the use of 43% of the visible light in sunlight, it is expected to develop a more efficient visible light-responsive photocatalyst. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing a s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J35/06A62D3/17A62D3/38
Inventor 滕飞肖建云张桐瑜陈敏东
Owner NANJING UNIV OF INFORMATION SCI & TECH
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