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FeS and Fe0 composite and preparation method and application thereof

A composite material and nanotechnology, applied in the field of chemical materials, can solve the problems of complex operation, long preparation time, waste of raw materials, etc., and achieve the effect of simple preparation process, environmental protection and feasible reactivity

Inactive Publication Date: 2015-12-23
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the replacement method is used to synthesize multi-layered particles, the operation is relatively complicated, the preparation time is long, and the synthesis process is easy to cause the waste of raw materials and the generation of malodorous gas.

Method used

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  • FeS and Fe0 composite and preparation method and application thereof
  • FeS and Fe0 composite and preparation method and application thereof
  • FeS and Fe0 composite and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A FeS / Fe 0 A method for preparing a composite material, comprising the steps of:

[0038] (1) Weigh 0.018mol of FeSO 4 ·7H 2 O (iron salt) and 0.036mol of NaBH 4 (strong reducing agent), respectively dissolved in anaerobic water to obtain NaBH 4 solution and FeSO 4 solution, in N 2 Under the protection of a closed environment, the NaBH 4 The solution was added dropwise to FeSO 4 Solution, mechanically stirred, and fully reacted for 20 minutes to form black nano-sized zero-valent iron particles;

[0039] (2) Magnetically separate the nano-zero-valent iron particles in the solution, wash them three times with anaerobic water and absolute ethanol, and then disperse the nano-zero-valent iron evenly in 100mL of anaerobic water to obtain a nano-zero-valent iron suspension;

[0040] (3) Weigh 0.002M FeSO 4 ·7H 2 O (ferrous salt) and Na 2 S, also dissolved in anaerobic water at a volume ratio of 1:1 to obtain FeSO 4 solution and Na 2 S solution, FeSO 4 The solutio...

Embodiment 2

[0044] This embodiment prepares FeS / Fe 0 The method of composite material is roughly identical with embodiment 1, and difference is: (1) choose ferric sulfate as the iron salt described in step (1); Choose potassium borohydride as the strong reducing agent described in step (1); Choose chloride Ferrous iron is as described ferrous salt of step (3); Select K for use 2 S replaces Na in step (3) 2 S; (2) the molar ratio of the ferric sulfate and potassium borohydride is 1:3; the ferrous chloride and K 2 The molar mass ratio of S is 1:1; the molar mass ratio of the iron salt described in step (1) to the ferrous salt described in step (3) is 3:1.

[0045] The FeS / Fe that this embodiment prepares 0 FeS and Fe in composites 0 The molar ratio is 1:3.

Embodiment 3

[0047] This embodiment prepares FeS / Fe 0 The method of composite material is roughly identical with embodiment 1, and difference is: (1) choose ferrous nitrate as the iron salt described in step (1); Choose potassium borohydride and sodium borohydride by 1:1 combination as step ( 1) described strong reductant; Choose ferrous nitrate as the ferrous salt described in step (3); (2) the molar ratio of described ferrous nitrate and strong reductant is 1:2; Described ferrous nitrate and Na 2 The molar mass ratio of S is 1:1; the molar mass ratio of the iron salt described in step (1) to the ferrous salt described in step (3) is 5:1.

[0048] The FeS / Fe that this embodiment prepares 0 FeS and Fe in composites 0 The molar ratio is 1:5.

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Abstract

The invention belongs to the field of chemical materials, and particularly relates to a FeS and Fe0 composite and a preparation method and application thereof. The FeS and Fe0 composite is formed by compositing nano FeS and nano Fe0, the surface of the nano Fe0 is coated with the nano FeS, and the molar ratio of the nano FeS to the nano Fe0 is 2:1 to 15:1. According to the FeS and Fe0 composite and the preparation method and application thereof, the preparation process is simple, convenient, environmentally friendly and feasible, the prepared FeS and Fe0 composite is high in reaction activity, capable of efficiently and rapidly reducing and adsorbing heavy metal ions in waste water within a wider temperature range, a pH value range and a dissolved oxygen content range and further capable of rapidly and efficiently activating hydrogen peroxide and persulfate to make a system generate hydroxyl free radicals and sulfate free radicals to degrade and mineralize organic pollutants, and therefore the FeS and Fe0 composite can be widely applied to degradation of the organic pollutants in surface water and underground water.

Description

technical field [0001] The invention belongs to the field of chemical materials, in particular to a FeS / Fe 0 Composite materials and their preparation methods and applications. Background technique [0002] The rapid development of industry and agriculture has led to serious water pollution problems, and the gradual reduction of available water resources has seriously affected people's living and production water, restricting the sustainable development of the country's economy and society. Heavy metals and refractory organic pollutants in environmental water pollution are the difficulty and focus of water pollution control. Therefore, it is an important topic in the field of environmental pollution control technology to explore efficient and cheap environmentally friendly materials (which can remove both heavy metal ions in wastewater and refractory organic matter). Zero-valent iron is an iron source reducing agent. Nano-zero-valent iron has high reactivity and can remove...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/70C02F1/58C02F1/62C01G49/12
Inventor 鲍建国陆承航杜江坤高珺
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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