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Thiourea dioxide reduced magnetic graphene oxide as well as preparation method and application of thiourea dioxide reduced magnetic graphene oxide

A technology of thiourea dioxide and rock oxide, applied in the fields of alkali metal oxides/hydroxides, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of harmfulness to human health, carcinogenicity, and high instability, and achieve high removal efficiency, The effect of wide source of raw materials and low price

Inactive Publication Date: 2017-06-13
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the employed reducing agents are usually not suitable for large-scale production because of their high cost and safety concerns
The most commonly used compound, hydrazine, is highly unstable and carcinogenic, while sodium borohydride is harmful to human health

Method used

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  • Thiourea dioxide reduced magnetic graphene oxide as well as preparation method and application of thiourea dioxide reduced magnetic graphene oxide
  • Thiourea dioxide reduced magnetic graphene oxide as well as preparation method and application of thiourea dioxide reduced magnetic graphene oxide
  • Thiourea dioxide reduced magnetic graphene oxide as well as preparation method and application of thiourea dioxide reduced magnetic graphene oxide

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Experimental program
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Effect test

Embodiment 1

[0025] A thiourea dioxide-reduced magnetic graphene oxide adsorbent of the present invention comprises a graphene oxide substrate on which magnetic ferrite nanoparticles are loaded. The thiourea dioxide-reduced magnetic graphene oxide adsorbent is prepared by the following method:

[0026] 30g graphite powder, 25g K2S2O4 and 25g P2O5 were added into 140mL concentration of 98% concentrated sulfuric acid, reacted for 4.5 hours at 80°C, added 1000mL ultrapure water after cooling to room temperature, and washed the product obtained after standing for 12 hours. After neutralization, pre-oxidized graphene is obtained; add the obtained pre-oxidized graphite to 240 mL of concentrated sulfuric acid with a concentration of 98%, then add 5 g NaNO3 and 30 g KMnO4, react at 0 ° C for 4 hours, and then heat up to 35 ° C for reaction 2 hours, add 500mL ultrapure water, react at 98°C for 1 hour, then add 1000mL ultrapure water and 40mL concentrated H2O2 at room temperature, continue to react ...

Embodiment 2

[0031] The thiourea dioxide reduction magnetic graphene oxide adsorbent prepared by the method of the present invention removes tetracycline in wastewater, comprising the following steps:

[0032] Get 50mL initial concentration and be the tetracycline (TC) solution of 5-100mg / L, adjust the pH value of solution to be 4.0, add the thiourea dioxide reduction magnetic graphene oxide adsorbent that embodiment 1 makes, the consumption of this adsorbent is 70g / L L, carry out oscillating adsorption reaction at 20, 30, 40 ℃ water bath constant temperature oscillator, after 24 hours, use a magnet to separate the adsorbent from the waste water, measure the content of unadsorbed tetracycline in the waste water by spectrophotometry, and calculate the adsorption The measurement results are shown in Table 1:

[0033] Table 1: Adsorption capacity data of adsorbents at 40 °C with different initial concentrations of TC

[0034]

[0035]

[0036] It can be seen from Table 1 that the adsorbe...

Embodiment 3

[0038] The thiourea dioxide reduction magnetic graphene oxide adsorbent prepared by the method of the present invention removes tetracycline in wastewater, comprising the following steps:

[0039] Get 50mL initial concentration and be the tetracycline (TC) solution of 10mg / L, add the NaCl of 0-0.1M respectively, the pH value of adjustment solution is 4.0, add the thiourea dioxide reduction magnetic graphene oxide adsorbent that embodiment 1 makes, the The amount of the adsorbent is 70g / L, and the oscillating adsorption reaction is carried out in a water bath constant temperature oscillator at 30°C. After 24 hours, the adsorbent is separated from the waste water with a magnet, and the unadsorbed TC content in the waste water is measured by spectrophotometry. In the absence of inorganic ions, the equilibrium adsorption capacity was 150 mg / g, which decreased to between 144.94 and 145.83 mg / g in the presence of NaCl.

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Abstract

The invention relates to thiourea dioxide reduced magnetic graphene oxide as well as a preparation method and application of the thiourea dioxide reduced magnetic graphene oxide. An adsorbent comprises a graphene oxide matrix; magnetic ferrite nanoparticles are loaded on the matrix. A preparation sequence is that graphite powder is pre-oxidized, graphene oxide and magnetic graphene oxide are prepared, and finally, the magnetic graphene oxide is reduced through thiourea dioxide. A product provided by the invention has a relatively good removing capability on tetracycline in a water body and has a high solid-liquid separation capability. The product can be used for treating tetracycline-containing wastewater in the fields of pharmacy, medical treatment, livestock and poultry breeding and the like.

Description

technical field [0001] The invention relates to the field of environmental functional materials and new water treatment technologies, in particular to a magnetic graphene oxide reduced by thiourea dioxide and its preparation method and application. Background technique [0002] Among pharmaceuticals and personal care products, antibiotics are an important class of compounds widely used in human therapy, animal husbandry and aquaculture. Tetracycline (TC; C22H24N2O8) is one of the most common broad-spectrum antibiotics. Adverse effects of TC residues, such as increased bacterial resistance to drugs and widespread antibiotic resistance genes, may ultimately threaten human health and ecosystem security. Therefore, it is very important to understand the environmental behavior of these compounds and to study methods for their removal. Among various treatment methods for the removal of tetracyclines, adsorption is a promising method because it is low-cost, has low energy require...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/28B01J20/20C02F1/28C02F101/34C02F101/38
CPCB01J20/28009B01J20/06B01J20/20C02F1/281C02F2101/34C02F2101/38
Inventor 胡新将杨远秀崔理华黄柱坚邓健斌许嘉文吴翠玉廖文威赵奕娜凌宇翔
Owner SOUTH CHINA AGRI UNIV
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