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Magnesium based ferrous sulfide composite nanomaterial as well as preparation method and application thereof

A composite nanomaterial, ferrous sulfide technology, applied in chemical instruments and methods, alkali metal compounds, inorganic chemistry, etc., can solve the problems of easy agglomeration, reduced reactivity and stability of ferrous sulfide, etc. It is beneficial to large-scale popularization and use, and the preparation method is simple and efficient.

Inactive Publication Date: 2018-10-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that nano-ferrous sulfide is easy to agglomerate, which will reduce the reactivity and stability of ferrous sulfide.

Method used

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  • Magnesium based ferrous sulfide composite nanomaterial as well as preparation method and application thereof
  • Magnesium based ferrous sulfide composite nanomaterial as well as preparation method and application thereof
  • Magnesium based ferrous sulfide composite nanomaterial as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Deoxygenation treatment of pure water: put 600ml of pure water in the liquid storage bottle, and continuously feed nitrogen gas (500ml / min) for 15-30min to remove dissolved oxygen in the water;

[0033] (2) Utilize the pure water after deoxygenation in step (1) to prepare the ferrous salt solution of 0.043M;

[0034] (3) Utilize the pure water after deoxygenation in step (1) to prepare 0.085M sodium sulfide solution;

[0035] (4) Get 94ml of pure water in step (1), add 0.06g of magnesium hydroxide powder, and utilize ultrasound to disperse magnesium hydroxide in pure water while nitrogen (100ml / min), obtain magnesium hydroxide suspension ;

[0036] (5) under the protection of nitrogen (100ml / min), add ferrous salt solution 16ml that is prepared in step (2) to step (4) gained magnesium hydroxide suspension and mix;

[0037] (6) under the protection of nitrogen (100ml / min), add dropwise the sodium sulfide solution 8ml that is joined in step (3) in the mixed system o...

Embodiment 2

[0041] Gained magnesium hydroxide-ferrous sulfide composite nanomaterials removal experiment of hexavalent chromium in water:

[0042] (1) preparation of hexavalent chromium concentration is 100mg / L, the hexavalent chromium solution of pH=7;

[0043] (2) get the chromium solution prepared in step (1), be divided into three groups (composite nanomaterial group, composite material group, blank group), every group 100ml;

[0044] (3) Add the following materials respectively in the three groups of solutions prepared in step (2): the composite nanomaterial group adds the magnesium hydroxide-ferrous sulfide composite nanomaterial 80ml of embodiment 1 gained 1g / L; Add 40mg of magnesium hydroxide, 40mg of ferrous sulfide, and 80ml of pure water; add 80ml of pure water to the blank group;

[0045] (4) The reaction system in step (3) is sampled respectively at 5min, 30min, 1h, 6h, 8h, 24h, 48h, and 72h after the start of the reaction. Spectrophotometry" detects the concentration of he...

Embodiment 3

[0048] Gained magnesium hydroxide-ferrous sulfide composite nanomaterials removal experiment of hexavalent chromium in acidic water:

[0049](1) preparation of hexavalent chromium concentration is 100mg / L, the hexavalent chromium solution of pH=3;

[0050] (2) get the prepared chromium solution in step (1), be divided into three groups (composite nanomaterial group, ferrous sulfide material group, blank group), every group 100ml;

[0051] (3) Add the following materials respectively in the three groups of solutions prepared in step (2): the composite nanomaterial group adds the magnesium hydroxide-ferrous sulfide composite nanomaterial 80ml of embodiment 1 gained 1g / L; Ferrous sulfide material 40mg of ferrous sulfide and 80ml of pure water were added to the control group; 80ml of pure water was added to the blank group;

[0052] (4) The reaction system in step (3) is sampled respectively at 5min, 30min, 1h, 6h, 8h, 24h, 48h, and 72h after the start of the reaction. Spectroph...

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Abstract

The invention belongs to the field of composite materials and discloses a magnesium based ferrous sulfide composite nanomaterial as well as a preparation method and application thereof. The preparation method comprises the steps: evenly dispersing magnesium based material powder into water to obtain a magnesium based material suspension, wherein a magnesium based material is at least one of magnesium oxide and magnesium hydroxide; then adding a ferrite water solution into the magnesium based material suspension, evenly mixing, dropwise adding a sodium sulfide water solution, reacting to obtainferrous sulfide and standing to obtain the magnesium based ferrous sulfide composite nanomaterial after reaction finishes. According to the preparation method disclosed by the invention, a nano ferrous sulfide material is loaded to the surface of the magnesium based material, and agglomeration of ferrous sulfide particles is inhibited to ensure reaction activity of the ferrous sulfide particles;the active surface of the magnesium based material can efficiently adsorb heavy metal, so that a utilization rate of the ferrous sulfide nanomaterial is improved; meanwhile, a weak-basicity material prepared from the magnesium based material is favorable for stable existence of the nano ferrous sulfide material, so that the composition material is not prone to metamorphosing and is easy to store.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a magnesium-based ferrous sulfide composite nanomaterial and a preparation method and application thereof. Background technique [0002] With the rapid economic development, the generation of industrial solid waste is increasing year by year. How to deal with harmful industrial solid wastes and reduce the adverse effects on the natural environment on which human beings depend is a realistic problem before people. Industrial solid waste often contains toxic and harmful heavy metals such as lead, cadmium, chromium, copper, zinc, nickel, mercury, and arsenic. If the solid waste containing heavy metals is not treated and disposed of in time, it will cause site and water pollution. . Therefore, the research and development of treatment technologies for solid waste containing heavy metals, especially low-consumption and non-polluting treatment technologies, is an urgent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/06B01J20/30C02F1/28B09C1/08C02F101/10C02F101/20C02F101/22
CPCB01J20/06B01J20/28007B01J20/28016B09C1/08C02F1/281C02F2101/103C02F2101/20C02F2101/22
Inventor 林璋刘学明邓洪刘炜珍莫晓峰宋开南李志生
Owner SOUTH CHINA UNIV OF TECH
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