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Preparation method of magnetic silver phosphate

A silver phosphate and magnetic technology, applied in the field of photocatalysis, can solve the problems of wide promotion, narrow light response range, low quantum efficiency, etc., and achieve the effects of good development prospects, simple preparation process and high recycling rate.

Active Publication Date: 2014-07-23
YANGZHOU UNIV
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Problems solved by technology

[0002] The rapid development of society has greatly improved people's living standards, but the accompanying environmental pollution has also seriously affected the environment on which people live. Nowadays, environmental pollution has become one of the most serious problems in human existence and life. In the past 40 years, photocatalytic removal of organic pollutants has been extensively studied and considered to be one of the effective and practical ways to alleviate environmental pollution problems. Most traditional photocatalysts can only absorb ultraviolet light, such as titanium dioxide, strontium titanate, etc. But ultraviolet light accounts for only 4% of the entire solar spectrum, while visible light accounts for 43%. Therefore, the development of efficient photocatalysts with visible light response is an important research topic in the field of photocatalysis.
[0003] Titanium dioxide is currently the most widely used photocatalyst, but its wide application in industry has been restricted due to its narrow photoresponse range and low quantum efficiency.

Method used

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  • Preparation method of magnetic silver phosphate
  • Preparation method of magnetic silver phosphate
  • Preparation method of magnetic silver phosphate

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preparation example Construction

[0021] A preparation method of magnetic silver phosphate, comprising the following steps:

[0022] 1) Mix silver nitrate aqueous solution with a concentration of 0.1~1mol / L and ammonia water with a concentration of 1-3% to make a silver ammonia solution, the concentration of the dilute ammonia water is 1-3%; mix the silver ammonia solution and polyvinylpyrrolidone Mix the PVP evenly, add 0.01~1g of iron ferric oxide nanoparticles with a particle size of 1-10nm, and ultrasonicate for 20min in an ultrasonic machine with an ultrasonic frequency of 50HZ to form the first mixed solution;

[0023] 2) Mix the disodium hydrogen phosphate aqueous solution with a concentration of 0.01~0.1mol / L and PVP evenly to form the second mixed solution;

[0024] 3) Adding the second mixed solution dropwise to the first mixed solution under stirring conditions to obtain a yellow-brown turbid solution;

[0025] 4) Put the yellowish-brown turbid liquid in a centrifuge tube, place it in a centrifuge ...

Embodiment 1

[0032] 1. Preparation of silver phosphate photocatalyst:

[0033] 1. Add silver nitrate to ionized water to prepare a silver nitrate aqueous solution with a concentration of 0.1-1mol / L. Dilute ammonia water (2%) is prepared by adding 1ml of laboratory concentrated ammonia water (25% by mass) to 10ml of distilled water.

[0034] 2. Take 30mL of silver nitrate aqueous solution, add dilute ammonia water drop by drop, shake while dripping, until the initial precipitate is just dissolved, and prepare silver ammonia solution. The reaction process is as follows:

[0035] .

[0036] Add 0.01-1g of PVP to the silver-ammonia solution, stir evenly, then add 0.01-1g of nano iron ferric oxide with a particle size of 1-10nm, and ultrasonically form the first mixed solution. The PVP concentration in the first mixed solution is: 0.5~20g / L.

[0037] 3. Add disodium hydrogen phosphate to ionized water to prepare an aqueous solution of disodium hydrogen phosphate with a concentration of 0.0...

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Abstract

The invention discloses a preparation method of a magnetic silver phosphate catalyst, belonging to the technical field of photocatalysis. The preparation method comprises the following steps: (1) mixing silver nitrate solution with the concentration of 0.1-1mol / L and weak aqua ammonia to prepare a silver-ammonia solution; uniformly mixing the silver-ammonia solution and PVP (polyvinyl pyrrolidone), adding 0.01-1g of ferroferric oxide nano particles, and carrying out ultrasonic treatment for 20min to form first mixed solution; (2) evenly mixing disodium hydrogen phosphate solution with the concentration of 0.01-0.1mol / L and PVP to form second mixed solution; (3) dropwise adding the second mixed solution into the first mixed solution under a stirring condition to obtain a yellowish-brown turbid solution; (4) carrying out magnetic separation on the yellowish-brown turbid solution and taking out solid phases, washing for 3 times with deionized water and ethyl alcohol, and drying at 60 DEG C to obtain magnetic silver phosphate. The preparation method has simple preparation process, and the prepared magnetic silver phosphate catalyst has good stability, high catalytic activity and high cyclic utilization rate.

Description

technical field [0001] The invention relates to a method for preparing magnetic silver phosphate as a photocatalyst, belonging to the technical field of photocatalysis. Background technique [0002] The rapid development of society has greatly improved people's living standards, but the accompanying environmental pollution has also seriously affected the environment on which people live. Nowadays, environmental pollution has become one of the most serious problems in human existence and life. In the past 40 years, photocatalytic removal of organic pollutants has been extensively studied and considered to be one of the effective and practical ways to alleviate environmental pollution problems. Most traditional photocatalysts can only absorb ultraviolet light, such as titanium dioxide, strontium titanate, etc. But ultraviolet light accounts for only 4% of the entire solar spectrum, while visible light accounts for 43%. Therefore, the development of efficient photocatalysts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185
Inventor 刁国旺秦贞贞狄健黄建祥
Owner YANGZHOU UNIV
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