Preparation method for three-dimensional layered CoV2O6 micro-nano powder

A micro-nano powder and layered technology is applied in the field of preparation of functional micro-nano materials, which can solve the problems of unsolved problems of decolorization, complex composition of printing and dyeing wastewater, and high cost of activated carbon preparation. The effect of uniform pore size distribution and high crystallinity

Inactive Publication Date: 2012-10-17
ANHUI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Dyes for printing and dyeing are almost all artificially synthesized, and have the characteristics of anti-photolysis, anti-oxidation, and anti-biodegradation, resulting in complex components of printing and dyeing wastewater that are difficult to biochemically degrade, especially the characteristics of water quality are high concentration, high chroma, high Chemical oxygen demand and biochemical oxygen demand, so its treatment technology has always been a difficult point in industrial wastewater treatment
And the problem of decolorization has not been well solved
Activated carbon is one of the commonly used adsorbents for adsorption and purification of wastewater. However, activated carbon has disadvantages such as high preparation cost, low recovery rate and expensive regeneration in application. Therefore, seeking new adsorbents has become a research hotspot in this field.

Method used

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  • Preparation method for three-dimensional layered CoV2O6 micro-nano powder
  • Preparation method for three-dimensional layered CoV2O6 micro-nano powder
  • Preparation method for three-dimensional layered CoV2O6 micro-nano powder

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Experimental program
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Effect test

Embodiment 1

[0032] Dissolve the cobalt nitrate hexahydrate raw material in 40 ml of water to prepare a 0.5M cobalt nitrate solution, add vanadium pentoxide (0.02mol) and vitamin C (0.06mol) under magnetic stirring at a speed of 50 rpm, and then The pH of the solution was adjusted to 3.0 with 0.5M dilute hydrochloric acid to obtain a cloudy mixed solution.

[0033] The obtained turbid mixed solution was transferred into a hydrothermal reaction kettle, and hydrothermally reacted at 160 °C for 10 h, and then the precipitate was filtered, washed, and dried to obtain a black solid powder product. The product characterization results are shown in the appendix figure 1 And attached figure 2 shown.

Embodiment 2

[0035] Dissolve the cobalt nitrate hexahydrate raw material in 40 ml of water to prepare a 0.5M cobalt nitrate solution, add vanadium pentoxide (0.02mol) and vitamin C (0.20mol) under magnetic stirring at a speed of 80 rpm, and then The pH of the solution was adjusted to 8.0 with 0.5M sodium hydroxide solution to obtain a cloudy mixed solution.

[0036] Transfer the obtained turbid mixed solution into a hydrothermal reaction kettle, conduct a hydrothermal reaction at 180°C for 3 hours, then filter, wash, and dry the precipitate to obtain a black solid powder product. The characterization results of the product are shown in the attached image 3 shown.

Embodiment 3

[0038] Dissolve the cobalt nitrate hexahydrate raw material in 40 ml of water to prepare a 0.5M cobalt nitrate solution, add vanadium pentoxide (0.02mol) and vitamin C (0.30mol) under magnetic stirring at a speed of 100 rpm, and then The pH of the solution was adjusted to 10.0 with 0.5M sodium hydroxide solution to obtain a cloudy mixed solution. The obtained turbid mixed solution was transferred into a hydrothermal reaction kettle for hydrothermal reaction at 240° C. for 8 h, and then the precipitate was filtered, washed and dried to obtain a black solid powder product.

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Abstract

The present invention discloses a preparation method for three-dimensional layered CoV2O6 micro-nano powder. According to the present invention, cobaltous nitrate hexahydrate or cobalt chloride hexahydrate, sodium hydroxide or hydrochloric acid, and vanadium pentoxide as raw materials; and steps of mixing, hydrothermal reaction, separation, washing, drying and the like are performed to obtain the three-dimensional layered CoV2O6 micro-nano powder. The three-dimensional layered CoV2O6 product prepared by the method of the present invention is black powder, wherein the three-dimensional layered CoV2O6 product belongs to a triclinic crystal system, and has advantages of large specific surface area (86.8 m<2> / g), high purity and good product quality. In addition, the three-dimensional layered CoV2O6 micro-nano powder prepared by the method of the present invention provides characteristics of fast adsorption rate and large saturated adsorption capacity for methylene blue trihydrate in solutions, wherein the saturated adsorption capacity is up to165.6 mg / g when the pH value of the solution is 1.0.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of functional micro-nano materials, in particular to three-dimensional layered CoV of methylene blue efficient adsorbent 2 o 6 The preparation method of the micro-nano powder. Background technique [0002] Nowadays, the textile printing and dyeing industry is an important part of the industry. Synthetic dyes are widely used in industry. The dye wastewater discharged is mainly methylene blue, which has caused certain harm and impact on the environment. Printing and dyeing wastewater is the main harmful industrial wastewater in my country at present. one. Dye wastewater has the characteristics of high chroma, difficult biodegradation, and high toxicity. Many dyes and their metabolites are toxic and can cause carcinogenic, teratogenic and abrupt effects on aquatic animals and humans. Therefore, the treatment of dye wastewater is very important. Dyes for printing and dyeing are almost ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00B01J20/06
Inventor 黄家锐郑丽丽谷翠萍
Owner ANHUI NORMAL UNIV
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