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Preparation method of high-gloss catalytic-activity bismuth oxyiodide crystal

A technology of bismuth oxyiodate and catalytic activity, which is applied in chemical instruments and methods, crystal growth, halogen oxides/oxyacids, etc., can solve the problems of complex preparation of composite materials, high cost of precious metals, poor stability, etc., and achieve synthesis The method and experimental steps are simple, the preparation yield is high, and the effect of high photogenerated electron and hole separation ability

Active Publication Date: 2013-12-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of composite materials is complicated, the stability is poor, and the cost of precious metals is high, which limits its practical application.

Method used

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  • Preparation method of high-gloss catalytic-activity bismuth oxyiodide crystal
  • Preparation method of high-gloss catalytic-activity bismuth oxyiodide crystal
  • Preparation method of high-gloss catalytic-activity bismuth oxyiodide crystal

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Measure 80mL of deionized water and add it to the beaker, weigh 0.485g of bismuth nitrate pentahydrate and add it to the above solution, stir continuously so that the bismuth nitrate is fully dispersed in the water, hydrolyze to generate bismuth oxynitrate, and form a uniform suspension. 0.214g of potassium iodate was added to the above solution, and stirred continuously to form a uniform milky white solution. Put the mixture into a 100mL autoclave lined with polytetrafluoroethylene, react at 150°C for 5 hours, cool to room temperature naturally, separate the sample by suction filtration, and wash the sample with deionized water and ethanol pentahydrate respectively 3 times and dried to obtain the product bismuth oxyiodate crystals.

[0028] attached figure 1 (Black) is the X-ray diffraction pattern of the product obtained in this example. It can be seen from the figure that each diffraction peak of the product is bismuth oxyiodate in the orthorhombic phase, and there ...

Embodiment 2

[0031] Measure 80mL of deionized water and add it to the beaker, weigh 0.485g of bismuth nitrate pentahydrate and add it to the above solution, stir constantly so that the bismuth nitrate is fully dispersed in the water, hydrolyze to generate bismuth oxynitrate, and form a uniform suspension. 0.214g of potassium iodate was added to the above solution, and stirred continuously to form a uniform milky white solution. Put the mixture into a 100mL autoclave with a polytetrafluoroethylene liner, react at 160°C for 5 hours, cool to room temperature naturally, separate the sample by suction filtration, and wash the sample with deionized water and ethanol pentahydrate respectively 3 times, dry.

[0032] attached Figure 5 It is the X-ray diffraction pattern of the product obtained in this embodiment, and it is known from the figure that the product is a pure-phase cubic phase bismuth oxyiodate crystal. attached Figure 6 It is the SEM image of the product obtained in this example, ...

Embodiment 3

[0034] Measure 80mL of deionized water and add it to the beaker, weigh 0.485g of bismuth nitrate pentahydrate and add it to the above solution, stir constantly so that the bismuth nitrate is fully dispersed in the water, hydrolyze to generate bismuth oxynitrate, and form a uniform suspension. 0.214g of potassium iodate was added to the above solution, and stirred continuously to form a uniform milky white solution. Put the mixture into a 100mL autoclave with a Teflon liner, react at 150°C for 12 hours, cool to room temperature naturally, separate the sample by suction filtration, and wash the sample with deionized water and ethanol pentahydrate respectively 3 times, dry.

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Abstract

The invention relates to a preparation method of a high-gloss catalytic-activity bismuth oxyiodide crystal, which comprises the following steps: adding bismuth nitrate into deionized water to prepare a solution, adding potassium iodate into the solution, stirring, transferring into a teflon-lined high-pressure autoclave, reacting at 150-160 DEG C for 5-12 hours, naturally cooling, separating by vacuum filtration, washing, and drying to obtain the product. The crystal prepared by the method provided by the invention is composed of very thin nanosheets, has laminated structure and intrinsic polarization field, has high photon-generated electron and hole separating power and excellent photocatalytic activity, and can effectively degrade organic pollutants.

Description

technical field [0001] The invention relates to the preparation of bismuth oxyiodate crystals with high photocatalytic activity, in particular to a preparation method of bismuth oxyiodate crystals promoted by a built-in electric field to separate photogenerated carriers, which can be used in the field of environmental protection technology for visible light degradation of organic pollutants. Background technique [0002] Semiconductor photocatalysts play an important role in the development of new energy sources and the treatment of organic pollutants, and photocatalytic technology has attracted more and more attention. Photocatalytic materials can absorb solar energy and convert solar energy into chemical energy to degrade organic matter, reduce carbon dioxide and decompose water to produce hydrogen. However, the practical application of photocatalytic technology is still limited by the quantum yield. The rapid recombination of electrons and holes generated by light irradia...

Claims

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Application Information

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IPC IPC(8): C01B11/00C30B29/22C30B28/06B01J27/06
Inventor 张晓阳王文君黄柏标秦晓燕
Owner SHANDONG UNIV
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