Preparing method of molybdenum sulfide compound and application of molybdenum sulfide compound in detecting hexavalent chromium in water

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

Active Publication Date: 2016-01-20
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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  • Preparing method of molybdenum sulfide compound and application of molybdenum sulfide compound in detecting hexavalent chromium in water
  • Preparing method of molybdenum sulfide compound and application of molybdenum sulfide compound in detecting hexavalent chromium in water
  • Preparing method of molybdenum sulfide compound and application of molybdenum sulfide compound in detecting hexavalent chromium in water

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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 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.

[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 fer...

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Abstract

The invention relates to a preparing method of a molybdenum sulfide compound and application of the molybdenum sulfide compound in detecting hexavalent chromium in water, and belongs to the technical field of detection of water environments. In the nitrogen atmosphere, ferric chloride hexahydrate and iron dichloride tetrahydrate are dissolved in deionized water and heated with the temperature maintained for 5-10 minutes, then ammonium hydroxide is used for adjusting the pH of the mixed system to 7.5-8.5, then aging and magnetic separation are carried out, and the solid phase is taken and washed with deionized water, dried and ground to obtain ferroferric oxide powder; deionized water containing the ferroferric oxide powder is mixed with a dihydrated molybdenum sulfate and thiourea solution for a reaction; reaction products are taken, washed with ethyl alcohol and deionized water and then dried, and the molybdenum sulfide compound carried by ferromagnetic ferroferric oxide particles is obtained. A detection method is low in cost, simple, reliable and high in sensitivity, and the specific content of hexavalent chromium with the hexavalent chromium ion concentration within the range of 0.5-328 micro mol.dm-3 can be accurately detected.

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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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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