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Photocatalytic titanium dioxide, graphene oxide and straw composite adsorbent and preparing method and application thereof

A titanium dioxide and composite adsorption technology, which is applied in the field of dye pollution and environmental restoration, can solve the problems of not meeting the environmental protection concept of green economy and complex preparation methods, and achieve the effect of simple adsorption process, simple preparation process and simple preparation method

Active Publication Date: 2018-08-31
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Photocatalytic titanium dioxide, graphene oxide and straw composite adsorbent and preparing method and application thereof
  • Photocatalytic titanium dioxide, graphene oxide and straw composite adsorbent and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Preparation of activated straw core powder

[0038] a. Dry the straw at 40°C for 24 hours, then peel off the straw epidermis, take the straw core and cut it into 1.5-2.5 cm segments, crush it, pass through a 100-mesh sieve, and obtain the straw core powder;

[0039] b. Add straw core powder to 10% ZnCl 2 In an aqueous solution, the ratio of solid to liquid is 0.05g / mL, and stirred in a water bath at 75°C for 1 hour to obtain a colloid;

[0040] c. Suction filter the colloid, wash three times with ethanol and distilled water successively, and dry 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, 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 0.01 g / mL;

[0...

Embodiment 2

[0053] 1) Preparation of activated straw core powder

[0054] a. Dry the straw at 40°C for 24 hours, then peel off the straw skin, take the straw core and cut it into 1.5-2.5 cm segments, crush it, and pass it through a 100-mesh sieve to obtain the straw core powder;

[0055] b. Add straw core powder to 10% ZnCl 2 In an aqueous solution, the ratio of solid to liquid is 0.1 g / mL, and stirred in a water bath at 75 °C for 1 h to obtain a colloid;

[0056] c. Suction filter the colloid, wash three times with ethanol and distilled water successively, and dry 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; the concentration of the titanium dioxide dispersion is 0.01 g / mL;

[0059] b. A...

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 straw epidermis, take the straw core and cut it into 1.5-2.5 cm segments, crush it, and pass it through a 100-mesh sieve to obtain the straw core powder;

[0070] b. Add straw core powder to 10% ZnCl 2 In an aqueous solution, the ratio of solid to liquid is 0.2 g / mL, and stirred in a water bath at 75 °C for 1 hour to obtain a colloid;

[0071] c. Suction filter the colloid, wash three times with ethanol and distilled water successively, and dry 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, 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 dispers...

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Abstract

The invention belongs to the technical field of dye pollution and environment repairing, and particularly relates to a photocatalytic titanium dioxide, graphene oxide and straw composite adsorbent anda preparing method and application thereof. The composite adsorbent is prepared by using titanium dioxide, graphene oxide and straw core powder as the raw materials and making titanium dioxide adsorbed to the surfaces of graphene oxide and the straw core powder through self-assembly. The prepared photocatalytic titanium dioxide, graphene oxide and straw composite adsorbent is a novel biomass composite and is simple in preparing process; cationic dyes can be efficiently removed under the small addition amount of the adsorbent; the titanium dioxide, graphene oxide and straw composite is adoptedas the adsorbent for the first time, the removal rate of the cationic dyes is high, the adsorption effect is excellent, the adsorption process is simple and easy to implement, separation is convenient, and no secondary pollution is caused after adsorption; the prepared adsorbent has a photocatalysis function and can degrade the cationic dyes so as to be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of dye pollution and environmental restoration, and in particular relates to a photocatalyzed titanium dioxide graphene oxide straw composite adsorbent and its preparation method and application. Background technique [0002] The development of modern industry has promoted the development of various dyes, but the extensive use of dyes will have a great impact on the environment. Because more than 20% of the dyes 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 the water body, which seriously threatens the balance of the ecosystem. The most traditional ways to control water pollution include precipitation, coagulation, reduction, fusion, membrane separation, i...

Claims

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Application Information

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Patent Type & Authority Applications(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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