Preparation and application of hollow tree-like bismuth oxide-bismuth sulfide complex

A technology of bismuth oxide and bismuth sulfide, applied in chemical/physical processes, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of environmental pollution, toxic and harmful organic intermediates that increase the difficulty of the post-processing process, and achieve Controllable crystal phase, cheap raw materials, and simple process

Active Publication Date: 2013-12-18
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the method of synthesizing these special morphology monoclinic bismuth oxides usually requires the introduction of organic solvents, surfactants, organic structure-directing agents, etc., because the introduction of these organic

Method used

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  • Preparation and application of hollow tree-like bismuth oxide-bismuth sulfide complex
  • Preparation and application of hollow tree-like bismuth oxide-bismuth sulfide complex
  • Preparation and application of hollow tree-like bismuth oxide-bismuth sulfide complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] According to bismuth nitrate pentahydrate in the reaction mixture: nitric acid: the mol ratio of potassium hydroxide is 1:1:4.7, takes by weighing 4.85 grams of bismuth nitrate pentahydrate and is dissolved in nitric acid, after stirring and dissolving, adjust solution pH value with potassium hydroxide solution, Then it was transferred to a 100 ml crystallization reactor for hydrothermal crystallization at 160oC for 6 hours. Filter, wash, dry and roast according to conventional methods to obtain a yellow powder. The yellow powder is characterized by X-ray powder diffractometer, scanning electron microscope, etc., and the obtained product is bismuth oxide, a hollow tube with a length of about 80-150 microns and a diameter of 3-5 microns.

[0025] Take by weighing 1 gram of the above-mentioned hollow tubular bismuth oxide, disperse it in 40 milliliters of deionized water, then add sodium sulfide nonahydrate solution, then transfer the mixed solution to the crystallization...

Embodiment 2

[0030] According to bismuth nitrate pentahydrate in the reaction mixture: nitric acid: the mol ratio of sodium hydroxide is 1:1:4.7, takes by weighing 4.85 grams of bismuth nitrate pentahydrate and is dissolved in nitric acid, after stirring and dissolving, adjust solution pH value with sodium hydroxide solution, Then it was transferred to a 100 ml crystallization reactor for hydrothermal crystallization at 160oC for 6 hours. Filter, wash, dry and roast according to conventional methods to obtain a yellow powder. The yellow powder is characterized by X-ray powder diffractometer, scanning electron microscope, etc., and the obtained product is bismuth oxide, a hollow tube with a length of about 80-150 microns and a diameter of 3-5 microns.

[0031] The preparation method of the hollow dendritic bismuth oxide-bismuth sulfide composite is the same as in Example 1.

[0032] Taking the degradation of rhodamine-B as a model reaction to investigate the photocatalytic activity of the ...

Embodiment 3

[0034] According to the molar ratio of bismuth nitrate pentahydrate in the reaction mixture: nitric acid: mixed alkali solution is 1:1:4.7 (wherein the mixed alkali solution is potassium hydroxide, the mixed solution of ammoniacal liquor), weigh 4.85 grams of bismuth nitrate pentahydrate and dissolve in nitric acid After stirring and dissolving, adjust the pH value of the solution with potassium hydroxide solution, then transfer to a 100 ml crystallization reactor, and conduct hydrothermal crystallization at 160oC for 6 hours. Filter, wash, dry and roast according to conventional methods to obtain a yellow powder. The yellow powder is characterized by X-ray powder diffractometer, scanning electron microscope, etc., and the obtained product is bismuth oxide, a hollow tube with a length of about 80-150 microns and a diameter of 3-5 microns.

[0035]The preparation method of the hollow dendritic bismuth oxide-bismuth sulfide composite is the same as in Example 1.

[0036] Taking...

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Abstract

The invention provides a preparation method of a hollow tree-like bismuth oxide-bismuth sulfide complex. The preparation method comprises the following steps: (1) taking bismuth nitrate pentahydrate, stirring and dissolving in dilute nitric acid, and then regulating the pH value of a bismuth nitrate solution to 9-14 with a fixed quantity of alkaline solution; then transferring the solution into a crystallization reaction kettle, reacting at the temperature of 80-200 DEG C for 0.5-12h, cooling, filtering, separating, washing with deionized water, washing with anhydrous ethanol, drying and calcining to obtain hollow tubular bismuth oxide; and (2) dispersing the prepared hollow tubular bismuth oxide in the deionized water, adding a water-soluble sulfide while stirring, controlling the molar ratio of the bismuth oxide to the sulfide to be 1: (1-8), then transferring the obtained solution into the crystallization reaction kettle, reacting at 40-180 DEG C for 0.5-36h, cooling, filtering, separating, washing with the deionized water for three times, washing with the anhydrous ethanol and drying to obtain the hollow tree-like bismuth oxide-bismuth sulfide complex. The invention further relates to an application of the hollow tree-like bismuth oxide-bismuth sulfide complex as a photocatalyst.

Description

[Technical field] [0001] The invention relates to the field of catalysts, in particular to the preparation and application of a hollow dendritic bismuth oxide-bismuth sulfide photocatalyst. [Background technique] [0002] With the development of society, the problem of energy shortage and environmental pollution has been paid more and more attention. Solving these two problems is an urgent need to achieve sustainable development. Solar energy is a kind of clean, inexhaustible energy source, so the full utilization of solar energy is considered to be one of the most likely ways to solve these two problems. Photocatalytic materials have important application prospects in the use of sunlight to photolyze water to produce hydrogen and eliminate organic pollutants. Traditional photocatalytic material TiO 2 Because of its wide band gap, it can only absorb ultraviolet light in sunlight, and its utilization efficiency of sunlight is low. In recent years, BiWO 6 , Bi 2 o 3 , Bi...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/02
Inventor 尹双凤陈浪熊苗黄锐袁青贺捷
Owner HUNAN UNIV
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