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Fe-doped biochar loaded TiO2 composite material preparation method and application

A technology of composite materials and biochar, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as separation and recovery difficulties, and achieve rapid preparation, short production cycle, preparation process and Simple operation effect

Inactive Publication Date: 2017-07-21
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems of separation and recovery in actual wastewater treatment, so the research on immobilized photocatalysts has attracted much attention.

Method used

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  • Fe-doped biochar loaded TiO2 composite material preparation method and application
  • Fe-doped biochar loaded TiO2 composite material preparation method and application
  • Fe-doped biochar loaded TiO2 composite material preparation method and application

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] A kind of Fe-doped biochar loaded TiO according to the present invention 2 The preparation of the composite material, biochar raw material selects the ramie stalk that removes leaf and bark, and specific preparation method is as follows:

[0028] The biomass raw material was washed with deionized water, then dried at 80°C for 24 hours, the dried biomass was pulverized, and passed through a 2mm sieve to obtain biomass powder; 10mL of tetra-n-butyl titanate and 0.101g of Ferric nitrate was slowly added in 15ml of absolute ethanol, and the mixed solution was stirred on a constant temperature magnetic stirrer at a speed of 200 rpm for 20min to form a yellow clear solution; 1.5g of the biomass powder obtained in step (1) was added and stirred for 30min to obtain a suspension Liquid A. Mix 5ml of glacial acetic acid, 5mL of deionized water and 5mL of absolute ethanol, and stir the mixture on a constant temperature magnetic stirrer at a speed of 200 rpm for 10 minutes to obta...

Embodiment 2

[0031] Fe-doped biochar loaded TiO of the present invention 2 The composite material treatment of ciprofloxacin in waste water comprises the following steps:

[0032] Get 50mL initial concentration and be the ciprofloxacin solution of 1~20mg / L, add the Fe-doped biochar loading TiO that embodiment 1 makes 2 The composite material, the amount of the adsorbent is 0.01g, and the photocatalytic reaction is carried out in a constant temperature incubator at 27 °C. After 2 hours, the photocatalyst is separated from the wastewater by centrifugation, and the photocatalyst in the wastewater is measured at 530nm by a spectrophotometer. The content of degraded ciprofloxacin, the calculated degradation results are shown in table 1:

[0033] Table 1: Photocatalyst degradation rate data under different initial concentrations of ciprofloxacin

[0034]

[0035]As can be seen from Table 1, the catalyst agent has a degradation capacity of 43.54 mg / g under the condition of 15 mg / L at the ini...

Embodiment 3

[0037] Fe-doped biochar loaded TiO of the present invention 2 The composite material treatment of ciprofloxacin in waste water comprises the following steps:

[0038] Get 50mL initial concentration and be the ciprofloxacin solution of 500mg / L, add the Fe-doped biochar loaded TiO that embodiment 1 makes Composite material, the consumption of this catalyst is 0.005g, 0.01g, 0.015g, at 27 ℃ constant temperature The photocatalytic reaction was carried out in the incubator, and after 2 hours, the photocatalyst was separated from the wastewater by centrifugation, and the content of undegraded ciprofloxacin in the wastewater was measured with a spectrophotometer at 530nm. The calculated degradation results are shown in Table 2 Shown:

[0039] Table 2: Degradation data of ciprofloxacin under different catalyst amounts

[0040] Catalyst dosage (g) 0.005 0.01 0.015 Degradation amount (mg / g) 28.53 43.54 19.63

[0041] It can be seen from Table 2 that the degra...

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Abstract

The invention relates to a Fe-doped biochar loaded TiO2 composite material preparation method and application. A composite material takes biochar as a matrix, and calcined Fe-doped TiO2 is loaded on the surface of the matrix. The preparation method includes steps: soaking biomass powder into tetra-n-butyl titanate, ferric nitrate and absolute ethyl alcohol solution, preparing Fe-doped biomass gel, and finally subjecting the gel to pyrolysis through a tubular atmosphere furnace in an N2 atmosphere to obtain the composite material. In a Fe-doped biochar loaded TiO2 composite material preparation process, biomass pyrolysis and Fe-doped TiO2 calcination are carried out in a same heat treatment process, so that preparation cost is reduced, and preparation time is shortened. The Fe-doped biochar loaded TiO2 composite material has a great degradation effect on dyes in wastewater.

Description

technical field [0001] The invention belongs to the field of environmental functional materials and water treatment new technologies, in particular to a Fe-doped biochar-loaded TiO 2 Preparation methods and uses of composite materials. Background technique [0002] As a kind of quinolone antibiotics, ciprofloxacin is widely used in medical treatment, animal husbandry, agriculture and aquaculture, and can enter the water environment through many channels. Ciprofloxacin can cause central system toxicity, liver and kidney toxicity, blood system toxicity, and phototoxicity to the human body, and can also make bacteria in the environment resistant to it, so its presence in the environment will affect the ecosystem and human health. Potential hazards, the migration and transformation of ciprofloxacin in the environment has attracted more and more attention. The general treatment methods include adsorption, photocatalytic degradation, biodegradation and membrane filtration. Amon...

Claims

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Application Information

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IPC IPC(8): B01J23/745C02F1/30
CPCC02F1/30B01J23/745C02F2103/343B01J35/39
Inventor 闫芝丽刘云国曾光明谭小飞刘少博李美芳周赞刘素华权邓佳钦
Owner HUNAN UNIV
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