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
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[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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