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Tellurium-zinc sulfide heterojunction compound hollow microsphere and preparation method thereof

A technology of hollow microspheres and heterojunctions, applied in the field of environmental governance, can solve the problems of long removal time, high cost, only 1-2 kinds of removal at a time, and low removal efficiency of low-concentration heavy metals.

Active Publication Date: 2018-06-19
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although many methods for removing heavy metals in wastewater can be used, the ideal treatment method should not only be suitable for the actual situation, but also meet the maximum pollutant level standards established by the country; usually these methods have high costs and can only remove 1-2 kinds of heavy metals at a time ions, long removal time or low removal efficiency for low concentrations of heavy metals

Method used

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  • Tellurium-zinc sulfide heterojunction compound hollow microsphere and preparation method thereof
  • Tellurium-zinc sulfide heterojunction compound hollow microsphere and preparation method thereof
  • Tellurium-zinc sulfide heterojunction compound hollow microsphere and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1: Weigh 0.2 g of tellurium diethyldithiocarbamate, 0.2 g of zinc N-ethyl-N-phenyldithiocarbamate, 0.2 g of 2,2'-dithiodibenzoic acid, Measure 27.6ml of chloroform solvent and 5ml of 20% ammonia; diethyldithiocarbamate tellurium, N-ethyl-N-phenyldithiocarbamate, 2,2'-dithiodithiocarbamate Benzoic acid was dissolved in chloroform, stirred for 10-15 minutes, then added ammonia water, and stirred for 3-5 minutes to form a mixed solution; the mixed solution was placed in a polytetrafluoroethylene reactor, and at 130 ° C, 4 reactions were carried out. hours; take out the inner liner of the reactor, pour the reactant into the centrifuge tube, remove the liquid, and leave the solid in the centrifuge tube; add alcohol to wash the solid, ultrasonicate for 5 minutes, and centrifuge at 10000 r / min for 10 minutes to remove the liquid and solid. The layer was washed in the same way as water-water-alcohol in sequence; the product was placed under the condition of 90°C and dri...

Embodiment 2

[0035] Example 2: Weigh 0.3 g of sodium tellurite, 0.3 g of zinc N-ethyl-N-phenyl dithiocarbamate, 0.35 g of 2,2'-dithiodibenzoic acid, and weigh 40.5 ml of solvent Chloroform and 10.7 ml of 20% ammonia. Dissolve sodium tellurite, zinc N-ethyl-N-phenyldithiocarbamate, and 2,2'-dithiodibenzoic acid in chloroform, stir for 10-15 minutes, add ammonia water, and stir for 3 -5 minutes to form a mixed solution; put the mixed solution in a polytetrafluoroethylene reactor, and react at 130 ° C for 4 hours; take out the inner tank of the reactor, pour the reactant into a centrifuge tube, and remove it by suction The liquid and the solid were left in the centrifuge tube; the solid was washed with alcohol, and after sonicating for 6 minutes, centrifuged at 10,000 r / min for 10 minutes to remove the liquid, and the solid layer was washed in the order of water-water-alcohol in the same way; the product was placed in 90 Under the condition of ℃, drying was carried out for 5 h to obtain ZnS / ...

Embodiment 3

[0036]Example 3: Weigh 0.1 g of tellurium diethyldithiocarbamate, 0.2 g of zinc N-ethyl-N-phenyldithiocarbamate, 0.1 g of thiourea, and weigh out 13.5 ml of chloroform and 3.7 ml of solvent 20% ammonia water. Dissolve diethyldithiocarbamate tellurium, N-ethyl-N-phenyldithiocarbamate, and thiourea in chloroform, stir for 10-15 minutes, add ammonia water, and stir for 3-5 minutes to form Mixed solution; put the mixed solution in a polytetrafluoroethylene reaction kettle, and react at 130 ° C for 4 hours; take out the inner liner of the reaction kettle, pour the reactant into a centrifuge tube, absorb the liquid, and leave the solid. In a centrifuge tube; the solid was washed with alcohol, and after ultrasonication for 8 minutes, centrifuged at 10,000 r / min for 10 minutes to remove the liquid, and the solid layer was washed with water-water-alcohol in the same way; the product was placed at 90 ℃. , and dried for 5h to obtain ZnS / Te microspheres.

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Abstract

The invention discloses a tellurium-zinc sulfide heterojunction compound hollow microsphere and a preparation method thereof. Chloroform is taken as a solvent, and ammonium hydroxide is taken as a buffered solution; a tellurium source, a sulfur source and an accelerant are added into the chloroform, then, the ammonium hydroxide is added to form a mixed solution, the mixed solution is added into areaction still, and the reaction still is put into a drying oven at the temperature of 130 DEG C to react for four hours; then, the reactant of the reaction still is poured into a centrifuge tube to absorb liquid in the centrifuge tube; ethyl alcohol is added for washing, ultrasound is carried out for five minutes, and then, the centrifuge tube is put into a centrifuge to be centrifuged for 5-10 minutes to remove liquid; with the same method, according to a water-water-ethyl alcohol sequence, washing is carried out, and a product is put in the drying oven at the temperature of 90 DEG C after washing is completely carried out to be dried for five hours to obtain the ZnS / Te microsphere. The tellurium-zinc sulfide microsphere prepared with the preparation method can be used for favorably remove various heavy metal ions, including Pb<2+>, Hg<2+>, Cu<2+> and Cd<2+>, in waste water, the removal rate of the tellurium-zinc sulfide microsphere for various ions is high and can be 98% or above, and removal efficiency even for low-concentration heavy metal ions is still high.

Description

technical field [0001] The invention relates to the technical field of environmental treatment, in particular to a tellurium-zinc sulfide heterojunction composite hollow microsphere for removing heavy metal ions and a preparation method thereof. Background technique [0002] With the rapid development of the economy, a large amount of wastewater containing heavy metal ions is discharged into the environment. The heavy metals mainly include lead, cadmium, chromium, nickel, copper and other substances. These heavy metals are the most dangerous pollutants in freshwater storage. In addition, heavy metals are carcinogenic and teratogenic, can pose serious health problems, and can accumulate in the human body through the food chain. Therefore, it is very necessary to treat the wastewater contaminated by heavy metals. [0003] In the prior art, methods for removing heavy metals include chemical precipitation, membrane filtration and ion exchange. Although the chemical precipitati...

Claims

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Application Information

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IPC IPC(8): B01J20/02B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/0262B01J20/28021C02F1/281C02F2101/20
Inventor 王舜尹德武金辉乐刘爱丽林大杰
Owner WENZHOU UNIVERSITY
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