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Controllable preparation method of silver phosphate nanocrystal photocatalytic material

A technology of nanocrystals and silver phosphate, applied in the field of photocatalytic materials, to achieve the effect of improving photocatalytic activity, simple method, and environmental friendliness

Active Publication Date: 2012-10-03
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using phytic acid as a soft template to prepare silver phosphate nanocrystals can reduce particle diameter and improve photocatalytic activity. This method has not been reported

Method used

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  • Controllable preparation method of silver phosphate nanocrystal photocatalytic material
  • Controllable preparation method of silver phosphate nanocrystal photocatalytic material
  • Controllable preparation method of silver phosphate nanocrystal photocatalytic material

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Take 30 mL of 1 mmol / L silver nitrate aqueous solution, then add 1 mL of 1 mmol / L sodium phytate solution, heat to boiling, keep for 3 minutes, then cool to room temperature, then add 1 mL of 0.01mol / L trisodium phosphate aqueous solution , fully stirred for 1 minute to form silver phosphate colloidal liquid, left to stand for 6 hours and then centrifuged, washed 4 times with deionized water to remove phytic acid adsorbed on the surface, and finally dried in a vacuum oven at 80 ℃ for 6 hours. The silver phosphate nanocrystals are prepared, and the average particle diameter of the obtained silver phosphate nanocrystals is 45nm.

Embodiment 2

[0021] Take 30 mL of 1 mmol / L silver nitrate aqueous solution, then add 1 mL of 1 mmol / L sodium phytate solution, heat to boiling, keep for 10 minutes, then cool to room temperature, then add 2 mL of 0.01mol / L dipotassium hydrogen phosphate Aqueous solution, fully stirred for 30 minutes to form silver phosphate colloidal liquid, left to continue to react for 6 hours, then centrifuged, washed with deionized water 4 times to remove phytic acid adsorbed on the surface, and finally dried in a vacuum oven at 80 ℃ for 6 hours The sample was obtained, and the average particle size of the obtained nano-silver phosphate crystals was 50nm.

Embodiment 3

[0023] (1) Preparation of sodium phytate solution: Dissolve 1 mmol / L of phytic acid in 1 L of water, and then add 1 mol / L of sodium hydroxide solution with a pipette until the pH of the mixed solution is 7, that is, 1 mmol / L L of sodium phytate solution;

[0024] (2) Take 30 mL of 1 mmol / L silver nitrate aqueous solution, then add 1 mL of 1 mmol / L sodium phytate solution prepared in step (1), heat to boiling, keep for 10 minutes, cool to room temperature, and then add 0.5 mL 0.01mol / L tripotassium phosphate aqueous solution, fully stirred for 1 minute to form a silver-yellow colloidal liquid of phosphate, left to stand for 6 hours and then centrifuged, and washed 4 times with deionized water to remove phytic acid adsorbed on the surface, and finally in The sample was dried in a vacuum oven at 80°C for 6 hours, and the average particle size of the obtained nano-silver phosphate crystals was 40nm.

[0025] The silver phosphate nanocrystal photocatalytic materials prepared in th...

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Abstract

The invention discloses a controllable preparation method of a silver phosphate nanocrystal photocatalytic material. The controllable preparation method comprises the following steps of: adding sodium phytate into silver nitrate solution, heating the solution till boiling, keeping for a certain period and then cooling to room temperature to obtain the phytic acid micelle solution containing silver ions; and adding phosphate into the obtained phytic acid micelle solution, fully agitating to form silver phosphate yellow colloid solution, statically placing for continuous reaction for a certain period, conducting centrifugal separation, washing for 3-4 times with deionized water and finally drying in a vacuum drying oven to obtain silver phosphate nanocrystals. The sodium phytate is brought or self-made; the phosphate is one of trisodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, tripotassium phosphate, dipotassium phosphate and monopotassium phosphate; and the purity of chemical reagent is above chemical purity. A range of grain size of the prepared silver phosphate nanocrystals is 40-100nm. Since the phytic acid which is extracted from plants is used as a soft template, the controllable preparation method is environmental-friendly and simple and facilitates industrialized production.

Description

technical field [0001] The technical field of the invention belongs to the technical field of photocatalytic materials, in particular to a controllable preparation method of silver phosphate nanocrystal photocatalytic materials. Background technique [0002] Photocatalysts can convert light energy into chemical energy, can photolyze water to generate hydrogen or degrade toxic pollutants in the environment, and their application prospects are very broad. TiO 2 Although it has many advantages, its wide band gap (about 3.2 eV) can only absorb photons in the ultraviolet region of the solar spectrum, and cannot effectively use sunlight. In May 2010, Ye Jinhua's research group reported on Nature Materials that silver phosphate is a new type of highly efficient photocatalytic material. They also synthesized rhombic dodecahedral and cubic silver phosphate microcrystals, and found that rhombohedral dodecahedral crystals have higher photocatalytic performance than regular tetrahedro...

Claims

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Application Information

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IPC IPC(8): C01B25/37B82Y40/00B01J27/18
Inventor 刘勇平方亮吕慧丹吴涵阳黄仁昭莫良祺
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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