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Graphene base TiO2 nano-composite material capable of removing humic acid in rural drinking water, and preparation method thereof

A nanocomposite material and graphene-based technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as limited ability to absorb visible light, difficulty in recycling and reuse, and achieve high cost performance , low cost and simple preparation process

Inactive Publication Date: 2017-06-13
GUIZHOU ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to TiO 2 The wide band gap leads to limited ability to absorb visible light, making it difficult to recycle and reuse

Method used

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  • Graphene base TiO2 nano-composite material capable of removing humic acid in rural drinking water, and preparation method thereof
  • Graphene base TiO2 nano-composite material capable of removing humic acid in rural drinking water, and preparation method thereof
  • Graphene base TiO2 nano-composite material capable of removing humic acid in rural drinking water, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of a graphene-based TiO for the removal of humic acid in rural drinking water 2 A nanocomposite material comprising the steps of:

[0044] (1) Put the round-bottomed beaker in an ice-water bath, add 23ml of ice-concentrated sulfuric acid, and add 0.5g of sodium nitrate, stir for 0.5h until the sodium nitrate powder is suspended in the solution; add 0.5g of graphite powder, and continue magnetic stirring for 1h to obtain mixture;

[0045] (2) Slowly add 3g of potassium permanganate to the mixed solution obtained in step (1), and stir for 1 hour in a water bath at 35°C to form a thick slurry; slowly add 40mL of deionized water, stir the solution for 30min, and the temperature rises to 90°C Add 100mL of deionized water, slowly add 3mL of 30wt% hydrogen peroxide, and stir for 30min; centrifuge the mixed solution, remove the supernatant, add 3wt% hydrochloric acid solution and deionized water to the centrifuge tube for centrifugal washing until the pH of the fil...

Embodiment 2

[0055] (1) Put the round-bottomed beaker in an ice-water bath, add 23ml of ice-concentrated sulfuric acid, and add 0.5g of sodium nitrate, stir for 1 hour until the sodium nitrate powder is suspended in the solution; add 0.5g of graphite powder, and continue magnetic stirring for 1 hour to obtain a mixture solution;

[0056] (2) Slowly add 3g of potassium permanganate to the mixed solution obtained in step (1), and stir for 1 hour in a water bath at 35°C to form a thick slurry; slowly add 40mL of deionized water, stir the solution for 30min, and the temperature rises to 90°C Add 100mL of deionized water, slowly add 3mL of 30wt% hydrogen peroxide, and stir for 30min; centrifuge the mixed solution, remove the supernatant, add 3wt% hydrochloric acid solution and deionized water to the centrifuge tube for centrifugal washing until the pH of the filtrate is 6~7, the aqueous solution of graphite oxide is obtained;

[0057] (3) Disperse graphite oxide in an aqueous solution and disp...

Embodiment 3

[0061] (1) Put the round-bottomed beaker in an ice-water bath, add 23ml of ice-concentrated sulfuric acid, and add 0.5g of sodium nitrate, stir for 2 hours until the sodium nitrate powder is suspended in the solution; add 0.5g of graphite powder, and continue magnetically stirring for 1 hour to obtain a mixed solution;

[0062] (2) Slowly add 3g of potassium permanganate to the mixed solution obtained in step (1), and stir for 1 hour in a water bath at 35°C to form a thick slurry; slowly add 40mL of deionized water, stir the solution for 30min, and the temperature rises to 90°C Add 100mL of deionized water, slowly add 3mL of 30wt% hydrogen peroxide, and stir for 30min; centrifuge the mixed solution, remove the supernatant, add 3wt% hydrochloric acid solution and deionized water to the centrifuge tube for centrifugal washing until the pH of the filtrate is 6~7, the aqueous solution of graphite oxide is obtained;

[0063] (3) Disperse graphite oxide in an aqueous solution and d...

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Abstract

The invention discloses a graphene base TiO2 nano-composite material capable of removing humic acid in rural drinking water, and a preparation method thereof. The preparation method is characterized in that ammonium hexafluorotitanate is taken as a raw material, graphene oxide prepared with a hummers method is taken as a carrier, and the graphene oxide and the ammonium hexafluorotitanate are mixed through a hydrothermal method to carry out hydrothermal conversion so as to prepare the graphene base TiO2 nano-composite material. The preparation method has the advantages of simple preparation technology, abundant raw materials, environment protection, low cost and high cost performance and does not need expensive equipment, and a preparation process is free from environment pollution. The graphene base TiO2 nano-composite material has a larger specific surface area, more organic matters can be adsorbed, no environment pollution is in the presence in a use process, the removal efficiency of organic matters is high, a powerful support is provided for drinking water safety and environment water body protection, and the graphene base TiO2 nano-composite material can be widely applied to the practical removal of the humic acid in the drinking water.

Description

technical field [0001] The invention relates to the technical field of photocatalytic adsorption, in particular to a photocatalytic adsorption composite material capable of efficiently removing humic acid in drinking water and a preparation method thereof. Background technique [0002] Humic acid is an important natural light-absorbing substance that widely exists in surface water and soil, and is the main component of natural organic matter in water bodies (accounting for about 50% to 90% of the total organic matter), containing various functional groups such as phenolic hydroxyl, carboxyl, and alcoholic hydroxyl Macromolecular polycyclic aromatic compounds are one of the main components that constitute the chroma in water. There is a strong complexation between humic acid molecules and heavy metal ions in water, which can enhance the stability of the colloid and form complex pollutants, thereby affecting the water treatment effect; in drinking water treatment, humic acid s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J21/18B01J35/02C02F1/28C02F101/34
CPCB01J20/06B01J20/20C02F1/281C02F1/283B01J20/28016B01J21/18C02F2305/10C02F2101/34B01J2220/42B01J2220/4806B01J35/40B01J35/39
Inventor 周晓周少奇
Owner GUIZHOU ACAD OF SCI
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