Preparation method for siliceous earth/FeOOH composite materials in micro-nano structure

An iron oxyhydroxide, micro-nano structure technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as difficult separation and easy agglomeration, and achieve the effects of convenient handling, low reaction temperature, and automatic control.

Inactive Publication Date: 2013-06-12
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, iron oxyhydroxide has high charge density, large specific surface area, and unique crystallization properties in metal oxides, so it has strong adsorption performance for heavy metals, but it is easy to agglomerate and difficult to separate.

Method used

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  • Preparation method for siliceous earth/FeOOH composite materials in micro-nano structure
  • Preparation method for siliceous earth/FeOOH composite materials in micro-nano structure
  • Preparation method for siliceous earth/FeOOH composite materials in micro-nano structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of diatomite / iron oxyhydroxide composite material with micro-nano structure, comprising the following steps:

[0026] (1) First weigh 10g of diatomaceous earth, add it to 150mL 2M hydrochloric acid solution, transfer it to a 250mL three-necked flask, and heat it in a water bath to 90 o C and stirred for 24 h, washed repeatedly with deionized water and ethanol until the solution was neutral, and dried by suction filtration.

[0027] (2) First, mix 60mL of deionized water and 60mL of ethylene glycol evenly in a 250mL volumetric flask, then take 90mL into the 250mL volumetric flask, and weigh 1.98g of FeSO 4 ·7H 2 0, 5 grams of diatomaceous earth after cleaning are added in the volumetric flask, and ultrasonicated for 5 minutes;

[0015] (2) The α-FeOOH of the above-mentioned composite material presents a nanostructure with high crystallinity and high purity;

Embodiment 2

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Abstract

The invention discloses a preparation method for siliceous earth/FeOOH composite materials in a micro-nano structure. The preparation method comprises the steps of evenly attaching FeOOH obtained by a water-bath method to the surface of siliceous earth, respectively characterizing prepared products by a field emission scanning electronic microscope and an X-ray diffraction instrument, and knowing that alpha-FeOOH is of an orthorhombic system structure, evenly distributed on the surface of the siliceous earth and even in morphological structure. The alpha-FeOOH of the composite materials is of a nano structure and has higher crystallinity and purity. During a preparation process, due to the fact that substances like templates are not added, follow-up processing is convenient to achieve, reaction temperature is low, reaction time is short, processes are simple, cost is low, and the preparation method is potentially applied to the field of environment.

Description

technical field [0001] The invention mainly relates to a preparation method of a diatomite / iron oxyhydroxide composite material with a micro-nano structure, and belongs to the field of adsorbent applications. Background technique [0002] Among inorganic natural minerals, diatomaceous earth is a biological siliceous rock composed of siliceous remains of diatoms and other microorganisms. Its mineral composition is mainly opal (SiO 2 ·H 2 O) and its variants. Diatomaceous earth is light, porous, and low in relative density. It also has many excellent properties such as unique microporous structure, large specific surface area, small bulk density, and acid resistance. The surface is covered by a large number of silicon hydroxyl groups. charge, therefore, its application in wastewater treatment has been paid more and more attention, especially for heavy metal cation pollutants. [0003] Because diatomaceous earth has a microporous structure and can effectively remove most of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/14B01J20/30
Inventor 康升红汪国忠方明杨勇王慧敏姜治
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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