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A photocatalytic titanium dioxide graphene oxide straw composite adsorbent and its preparation method and application

A titanium dioxide and composite adsorption technology, which is applied in the field of dye pollution and environmental remediation, can solve the problems of complex preparation method, does not meet the environmental protection concept of green economy, etc., and achieves the effects of simple preparation process, simple and easy adsorption process, and high adsorption capacity.

Active Publication Date: 2020-09-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation methods of the adsorbents published in the above patents must undergo high temperature treatment, and the preparation methods are relatively complicated, which does not meet the environmental protection concept of green economy.

Method used

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  • A photocatalytic titanium dioxide graphene oxide straw composite adsorbent and its preparation method and application
  • A photocatalytic titanium dioxide graphene oxide straw composite adsorbent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Preparation of activated straw core powder

[0038] a. Dry the straw at 40℃ for 24h, then peel off the skin of the straw, cut the straw core into 1.5~2.5cm segments, smash it, and pass through a 100-mesh sieve to obtain straw core powder;

[0039] b. Add straw core powder to ZnCl with a mass concentration of 10% 2 In the aqueous solution, the material-to-liquid ratio is 0.05g / mL, and it is stirred in a 75℃ water bath for 1 hour to obtain a colloid

[0040] c. The colloid is suction filtered, washed with ethanol and distilled water three times in sequence, and dried to obtain activated straw core powder;

[0041] 2) Preparation of photocatalytic titanium dioxide graphene oxide straw composite adsorbent

[0042] a. Disperse 0.2 parts by weight of titanium dioxide in water, disperse ultrasonically for 20 minutes, and stir every 5 minutes during the ultrasonic process to obtain a titanium dioxide dispersion; wherein the concentration of the titanium dioxide dispersion is 0.01 g / m...

Embodiment 2

[0053] 1) Preparation of activated straw core powder

[0054] a. Dry the straw at 40℃ for 24 hours, then peel off the skin of the straw, cut the straw core into 1.5~2.5 cm sections, smash it, and pass through a 100-mesh sieve to obtain straw core powder;

[0055] b. Add straw core powder to ZnCl with a mass concentration of 10% 2 In the aqueous solution, the material-to-liquid ratio is 0.1g / mL, and the gel is obtained by stirring in a water bath at 75°C for 1 h;

[0056] c. The colloid is suction filtered, washed with ethanol and distilled water three times in sequence, and dried to obtain activated straw core powder;

[0057] 2) Preparation of photocatalytic titanium dioxide graphene oxide straw composite adsorbent

[0058] a. Disperse 0.3 parts by weight of titanium dioxide in water, ultrasonically disperse for 20 minutes, and stir every 5 minutes during the ultrasonic process to obtain a titanium dioxide dispersion; wherein the concentration of the titanium dioxide dispersion is 0.0...

Embodiment 3

[0068] 1) Preparation of activated straw powder and straw core powder

[0069] a. Dry the straw at 40°C for 24 hours, then peel off the skin of the straw, cut the straw core into 1.5~2.5 cm sections, smash it, and pass through a 100-mesh sieve to obtain straw core powder;

[0070] b. Add straw core powder to ZnCl with a mass concentration of 10% 2 In the aqueous solution, the material-to-liquid ratio is 0.2 g / mL, and the gel is obtained by stirring in a water bath at 75°C for 1 hour;

[0071] c. The colloid is suction filtered, washed with ethanol and distilled water three times in sequence, and dried to obtain activated straw core powder;

[0072] 2) Preparation of photocatalytic titanium dioxide graphene oxide straw composite adsorbent

[0073] a. Disperse 0.4 parts by weight of titanium dioxide in water, and ultrasonically disperse for 20 minutes. Stir every 5 minutes during the ultrasonic process to obtain a titanium dioxide dispersion; wherein the concentration of the titanium dio...

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Abstract

The invention belongs to the technical field of dye pollution and environmental remediation, and specifically relates to a photocatalytic titanium dioxide oxide graphene straw composite adsorbent and its preparation method and application. The composite adsorbent of the present invention uses titanium dioxide, graphene oxide and straw core powder as raw materials, and is prepared by self-assembly to attach titanium dioxide to the surface of graphene oxide and activated straw core powder. The photocatalytic titanium dioxide oxide graphene straw composite adsorbent prepared by the present invention is a new type of biomass composite material and has a simple preparation process; it can achieve efficient removal of cationic dyes with a smaller adsorbent addition amount; it is the first time that titanium dioxide oxidation is used As an adsorbent, graphene straw composite materials have a high removal rate of cationic dyes and excellent adsorption effects. The adsorption process is simple and easy to separate, and there is no secondary pollution after adsorption. The prepared adsorbent has a photocatalytic function and can The cationic dye is degraded, thereby enabling the adsorbent to be reused.

Description

Technical field [0001] The invention belongs to the technical field of dye pollution and environmental restoration, and specifically relates to a photocatalytic titanium dioxide graphene oxide straw composite adsorbent, and a preparation method and application thereof. Background technique [0002] The development of modern industry has promoted the development of various dyes, but the massive use of dyes will have a great impact on the environment. Because more than 20% of the dye will fade during use, causing water pollution and soil pollution. Dyes are easily dispersed in water, and these pollutants can flow into the human body along the food chain to cause allergies, poisoning, and even cancer and other diseases. At the same time, dye pollution will cause eutrophication of water bodies and seriously threaten the balance of the ecosystem. The most traditional ways to control water pollution include precipitation, solidification, reduction, fusion, membrane separation, ion ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01J21/06C02F1/28C02F1/30C02F101/30
CPCB01J20/0211B01J20/20C02F1/281C02F1/30B01J21/063C02F2101/308B01J35/39
Inventor 刘珊珊陈娟葛曷一邹玉
Owner UNIV OF JINAN
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