Preparation method of kieselguhr in-situ growth Nb2O5 nanorod

A technology of in-situ growth and diatomite, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve problems such as solid-liquid separation difficulties, waste, and secondary pollution

Inactive Publication Date: 2018-12-14
QIDONG CHUANGLU NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nanostructured materials can significantly increase specific surface area and chemical activity, but nanoadsorb...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A kind of diatomaceous earth grows Nb in situ 2 o 5 The preparation method of nanorod, comprises the steps: with 20 parts of Nb 2 o 5 Add 65 parts of hydrofluoric acid to the powder, then add 35 parts of ammonia water, react for 3.5 hours, filter, wash, and dry to obtain niobic acid powder; put 15 parts of niobic acid powder into a polyethylene reactor, and then add 25 parts of oxalic acid Ammonium, 10 parts of SDBS, 20 parts of diatomaceous earth and 60 parts of deionized water were stirred for 55 minutes. After being uniformly dissolved, they were placed in a 150°C oven and heated for 16 hours at a constant temperature, cooled, filtered, washed and dried. is parts by weight.

Embodiment 2

[0015] A kind of diatomaceous earth grows Nb in situ 2 o 5 The preparation method of nanorod, comprises the steps: with 15 parts of Nb 2 o 5 Add 60 parts of hydrofluoric acid to the powder, then add 30 parts of ammonia water, react for 3 hours, filter, wash, and dry to obtain niobic acid powder; put 10 parts of niobic acid powder into a polyethylene reactor, and then add 20 parts of ammonium oxalate , 5 parts of SDBS, 15 parts of diatomaceous earth and 55 parts of deionized water, stirred for 50 minutes, after being uniformly dissolved, placed in a 145°C oven and heated for 15 hours at a constant temperature, cooled, filtered, washed and dried to obtain the product; each raw material was parts by weight.

Embodiment 3

[0017] A kind of diatomaceous earth grows Nb in situ 2 o 5 The preparation method of nano rod, comprises the steps: with 25 parts of Nb 2 o 5 Add 70 parts of hydrofluoric acid to the powder, then add 40 parts of ammonia water, react for 4 hours, filter, wash, and dry to obtain niobic acid powder; put 20 parts of niobic acid powder into a polyethylene reactor, and then add 30 parts of ammonium oxalate , 15 parts of SDBS, 25 parts of diatomaceous earth and 65 parts of deionized water, stirred for 60 minutes, after being uniformly dissolved, placed in an oven at 155°C for 17 hours at a constant temperature, cooled, filtered, washed and dried to obtain the product; each raw material was parts by weight.

[0018] The method is simple, fast and easy to operate, and the prepared Nb 2 o 5 Nanorods have excellent adsorption and removal capacity for Cr(VI) and can be prepared on a large scale.

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PUM

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Abstract

The invention discloses a preparation method of a kieselguhr in-situ growth Nb2O5 nanorod. The preparation method comprises the following steps: adding Nb2O5 powder into hydrofluoric acid, then addingammonia water for reaction for 3 to 4 h, and performing filtering, washing and drying to obtain niobic acid powder; putting the niobic acid powder into a polyethylene reaction kettle, adding ammoniumoxalate, SDBS (sodium dodecyl benzene sulfonate), kieselguhr and deionized water, stirring the materials for 50 to 60 min, putting the mixture into a drying box at 145 to 155 DEG C after the materials are uniformly dissolved, performing constant-temperature heating for 15 to 17 h, and cooling, filtering, cleaning and drying the mixture, thus obtaining the kieselguhr in-situ growth Nb2O5 nanorod.The method is simple, convenient, quick and easy to operate; the prepared Nb2O5 nanorod is excellent in adsorption and removal capacity for Cr(VI) and can be prepared in a large scale.

Description

technical field [0001] The invention relates to a diatomite in-situ growth Nb 2 o 5 Preparation method of nanorods. Background technique [0002] Chromium is recognized as one of the most toxic heavy metal pollutants. Chromium often exists as chromate anion in water (such as: HCrO 4− , Cr2O7 2− , CrO4 2− etc.), industrial governance is very difficult. The adsorption method is the most widely used method for the treatment of chromium-containing wastewater, and the adsorption performance of the adsorbent is very critical. In the process of pollution control of heavy metals containing Cr, the toxic degradation of Cr is also extremely important. The analysis of the correlation between the chemical valence state of Cr ion and toxicity shows that Cr(Ⅲ) is difficult to be absorbed (absorption rate is 0.1-0.2%), and its toxicity is much lower than that of Cr(Ⅵ). Transformation has become a research hotspot in Cr pollution control. Diatomaceous earth is an inorganic mineral ...

Claims

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Application Information

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IPC IPC(8): B01J20/14C02F1/28B01J20/30C02F101/22
CPCB01J20/14B01J20/06C02F1/281C02F2101/22
Inventor 不公告发明人
Owner QIDONG CHUANGLU NEW MATERIAL CO LTD
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