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Preparation method of silver-doped polycrystalline zinc ferrite photocatalytic nanomaterials

A nano-material, zinc ferrite technology, applied in the field of photocatalysis, can solve the problems that the photocatalytic performance cannot achieve the ideal effect, the separation rate of photogenerated electrons and holes is slow, and the solar light absorption efficiency is limited, so as to achieve good catalytic activity and Degradation effect, beneficial to industrial production, and shortening the process cycle

Active Publication Date: 2022-05-31
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its own shortcomings as a photocatalyst are: first, the specific surface area is small, and the absorption efficiency of sunlight is limited; second, the separation rate of photogenerated electrons and holes is slow, resulting in the photocatalytic performance can not achieve the desired effect

Method used

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  • Preparation method of silver-doped polycrystalline zinc ferrite photocatalytic nanomaterials
  • Preparation method of silver-doped polycrystalline zinc ferrite photocatalytic nanomaterials
  • Preparation method of silver-doped polycrystalline zinc ferrite photocatalytic nanomaterials

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Experimental program
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Effect test

Embodiment 1

[0026] A preparation method of silver-doped polycrystalline zinc ferrite photocatalytic nanomaterial, comprising the following steps:

[0027] Step 1, adding 4mmol urea into 50 milliliters of distilled water is mixed with the urea solution that the mass volume concentration is 0.5g / L, then the silver nitrate of 5mmol zinc nitrate, 10mmol ferrous sulfate and 1.5mmol is added in the configured urea solution, ultrasonic 5min, stirring for 15min, silver nitrate was dissolved in water, ferrous sulfate and zinc nitrate were dispersed in urea solution;

[0028] Step 2. Add the amphoteric triblock polymer (F127) formed by 6mmol of ammonium fluoride and 8mmol of oxy-propoxy-ethoxy to the mixed solution prepared in step 1, ultrasonicate for 5min, and add the solution to the volume. It is placed in the lining of a 50mL polytetrafluoroethylene reaction kettle, and then put into the reaction kettle. After nitrogen is passed through, the reaction is carried out at 180 ° C for 12 hours to ob...

Embodiment 2

[0032] A preparation method of silver-doped polycrystalline zinc ferrite photocatalytic nanomaterial, comprising the following steps:

[0033] Step 1, adding 4mmol urea into 50 milliliters of distilled water is mixed with the urea solution that the mass volume concentration is 0.5g / L, then the silver nitrate of 5mmol zinc nitrate, 10mmol ferrous sulfate and 1.5mmol is added in the configured urea solution, ultrasonic 5min, stirring for 20min, silver nitrate was dissolved in water, ferrous sulfate and zinc nitrate were dispersed in urea solution;

[0034] Step 2. Add the amphoteric triblock polymer (F127) formed by 8 mmol of ammonium fluoride and 10 mmol of oxy-propoxy-ethoxy to the mixed solution prepared in step 1, ultrasonicate for 8 min, and add the solution to the volume. It was placed in the lining of a 50mL polytetrafluoroethylene reaction kettle, and then put into the reaction kettle. After passing through nitrogen, the reaction was carried out at 180 ° C for 12 hours t...

Embodiment 3

[0038]A preparation method of silver-doped polycrystalline zinc ferrite photocatalytic nanomaterial, comprising the following steps:

[0039] Step 1, adding 4mmol urea into 50 milliliters of distilled water is mixed with the urea solution that the mass volume concentration is 0.5g / L, then the silver nitrate of 5mmol zinc nitrate, 10mmol ferrous sulfate and 1.5mmol is added in the configured urea solution, ultrasonic 5min, stirring for 15min, silver nitrate was dissolved in water, ferrous sulfate and zinc nitrate were dispersed in urea solution;

[0040] Step 2. Add the amphoteric triblock polymer (F127) formed by 10 mmol of ammonium fluoride and 12 mmol of oxy-propoxy-ethoxy to the mixed solution prepared in step 1, ultrasonicate for 10 min, and add the solution to the volume. It is placed in the lining of a 50mL polytetrafluoroethylene reaction kettle, and then put into the reaction kettle. After nitrogen is passed through, the reaction is carried out at 180 ° C for 12 hours ...

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Abstract

The invention discloses a method for preparing silver-doped polycrystalline zinc ferrite photocatalytic nanomaterials. In the method of the invention, silver nitrate is dissolved in water under ultrasonic conditions, distilled water is used as a dispersion medium, ferrous sulfate and Zinc nitrate is dispersed into the urea solution dissolved with silver nitrate to form a thermodynamically stable system; ammonium fluoride and oxy-propoxy-ethoxy amphoteric triblock polymer (F127) are used as adjustment reagents to adjust the silver-doped The crystal face of heterogeneous zinc ferrite nanoparticles is hydrothermally reacted to obtain the final product; the silver-doped zinc ferrite nanoparticles with magnetic response properties are extracted with a magnet, washed with absolute ethanol, and dried to obtain a broad spectrum Responsive silver-doped zinc ferrite nanomaterials. In the method of the present invention, the generation of magnetic particles, the adjustment of crystal planes of ammonium fluoride and F127, and the hydrolysis of urea are carried out simultaneously, which effectively simplifies the process of preparing composite materials, shortens the process cycle, reduces costs, and is beneficial to industrial production. .

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a preparation method of a silver-doped polycrystalline zinc ferrite photocatalytic nanomaterial. Background technique [0002] In recent years, a large number of new semiconductor materials have been developed and utilized due to their excellent photocatalytic and photoelectric catalytic properties, which is of great significance for alleviating the problems of fuel shortage and environmental pollution. These semiconductor photocatalysts (including TiO 2 , ZnFe 2 O 4 , g-C 3 N 4 , MoS 2 etc.) in the fields of solar cells, photocatalytic degradation of organic pollutants, and photocatalytic hydrogen evolution have received extensive attention and consideration. Through a new technology, the photocatalytic host can effectively convert solar energy into chemical energy and play a role in purifying the environment, with the advantages of low pollution, high efficiency, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J37/10B01J37/34C02F1/30C02F101/34C02F101/38C02F101/30
CPCB01J23/8953B01J23/002B01J37/10B01J37/343C02F1/30C02F2101/34C02F2101/345C02F2101/38C02F2101/30C02F2305/10B01J35/33B01J35/40B01J35/39Y02W10/37
Inventor 张春朱鸿睿滕桂香王康旺
Owner LANZHOU JIAOTONG UNIV