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Preparation method of molybdenum sulfide complex and its application in detecting hexavalent chromium in water

A compound, molybdenum sulfide technology, applied in the field of environmental detection, achieves the effects of low cost, high sensitivity and improved catalytic performance

Active Publication Date: 2018-03-13
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrocatalytic activity of molybdenum sulfide is still not dominant compared with noble metals.

Method used

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  • Preparation method of molybdenum sulfide complex and its application in detecting hexavalent chromium in water
  • Preparation method of molybdenum sulfide complex and its application in detecting hexavalent chromium in water
  • Preparation method of molybdenum sulfide complex and its application in detecting hexavalent chromium in water

Examples

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1 example 1

[0040] 1. At room temperature, weigh ferric chloride hexahydrate and ferrous chloride tetrahydrate and dissolve them in deionized water, stir in nitrogen for 20 minutes to obtain solution 1; the rate of feeding nitrogen is 100-200 ml / min.

[0041] 2. Keep the ratio of the amount of the two solutes in solution 1 as 1 / 3.

[0042] 3. Continue to feed nitrogen, heat the solution in a water bath from 1 to 60°C and keep it for 5 minutes; the rate of feeding nitrogen is 100-200 ml / min.

[0043] 4. Under the protection of nitrogen, slowly add ammonia water with a concentration of 1.5 mol / L to solution 1 until the pH is 7.5; the rate of feeding nitrogen is 100-200 ml / min.

[0044] 5. Then aging the above mixed solution at 70°C for 20-40 minutes.

[0045] 6. After the reaction, magnetically separate to obtain ferric oxide, and wash the obtained ferric oxide with deionized water for 5 times until the pH of the solution is within the range of 7.0.

[0046] 7. Transfer the separated iron...

2 example 2

[0058] 1. At room temperature, weigh ferric chloride hexahydrate and ferrous chloride tetrahydrate, dissolve them in deionized water, and stir in nitrogen for 20 minutes to obtain solution 1; the rate of feeding nitrogen is 100-200 ml / min.

[0059] 2. Keep the ratio of the amount of the two solutes in solution 1 as 1 / 4.

[0060] 3. Continue to feed nitrogen, heat the solution in a water bath from 1 to 60°C and keep it for 10 minutes; the rate of feeding nitrogen is 100-200 ml / min.

[0061] 4. Under the protection of nitrogen, slowly add ammonia water with a concentration of 1.5 mol / L to solution 1 until the pH is 7.5; the rate of feeding nitrogen is 100-200 ml / min.

[0062] 5. Then aging the above mixed solution at 60° C. for 30 minutes.

[0063] 6. After the reaction, magnetically separate to obtain ferric oxide, and wash the obtained ferric oxide with deionized water 8 times until the pH of the solution is within the range of 7.0.

[0064] 7. Transfer the separated iron fe...

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Abstract

The preparation method of molybdenum sulfide compound and its application in detecting hexavalent chromium in water belong to the technical field of detection of water environment. In a nitrogen atmosphere, ferric chloride hexahydrate and ferrous chloride tetrahydrate are dissolved in deionized water and After raising the temperature and maintaining it for 5-10 minutes, adjust the pH of the mixed system to 7.5-8.5 with ammonia water, then age and magnetically separate, take the solid phase and wash it with deionized water, dry it, and grind it to obtain ferric oxide powder; The deionized water of ferroferric oxide powder is dissolved and reacted with molybdenum sulfate dihydrate and thiourea; the reaction product is washed with ethanol and deionized water and then dried to obtain a molybdenum sulfide composite supported by ferromagnetic ferroferric oxide particles. The detection method has low cost, is simple, reliable, and has high sensitivity, and can accurately detect the specific content of the hexavalent chromium ion concentration in the range of 0.5-328 μmol·dm-3.

Description

technical field [0001] The invention belongs to the technical field of environmental detection, in particular to the detection technology of hexavalent chromium in water. Background technique [0002] The rapid development of metallurgy and mining has resulted in more and more wastewater containing hexavalent chromium being discharged into the environment, which poses a serious threat to the environment. Chromium-containing wastewater is difficult to be biodegraded after being discharged into water bodies, and will be transferred to aquatic animals, plants and humans through the food chain, which is potentially harmful to organisms and even carcinogenic. Therefore, the real-time detection of hexavalent chromium is particularly important. [0003] Commonly used detection methods for water micropollutants include: electrochemical method, gas chromatography, liquid chromatography, etc. Electrocatalytic methods have attracted much attention due to their simple operation and hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48G01N27/30
Inventor 张娅王宏归季俊杰陈鹏温芳芳姜雅
Owner YANGZHOU UNIV
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