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TiO2-loaded biochar composite material and preparation method and application thereof

A technology of composite materials and biochar, applied in chemical instruments and methods, water pollutants, chemical/physical processes, etc., to achieve the effects of short production cycle, reduced preparation cost and time, and high product recovery rate

Inactive Publication Date: 2016-06-22
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to develop a low-cost, high-efficiency biochar-loaded TiO2 that can be used for photocatalytic treatment of dye pollutants in view of the technical problems existing in the prior art. 2 composite material

Method used

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  • TiO2-loaded biochar composite material and preparation method and application thereof
  • TiO2-loaded biochar composite material and preparation method and application thereof
  • TiO2-loaded biochar composite material and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0027] A kind of biochar loaded TiO of the present invention 2 For the preparation of composite materials, the biochar raw material is selected from ramie stalks with leaves and skins removed, and the specific preparation method is as follows:

[0028] Wash the ramie stalks with the leaves and skins removed with deionized water, then dry them at 80°C for 24 hours, crush the dried ramie stalks, and pass through a 2mm sieve to obtain ramie stalk powder; add 10mL tetra-n-butyl titanate Slowly added to 15ml of absolute ethanol, the mixture was stirred on a constant temperature magnetic stirrer at a speed of 200 rpm for 20min to form a yellow clear solution; 2g of biomass powder was added and stirred for 30min to obtain a suspension A; 5ml of glacial acetic acid and 5 mL of deionized water was mixed with 5 mL of absolute ethanol, and the mixture was stirred on a constant temperature magnetic stirrer at a speed of 200 rpm for 10 minutes to obtain solution B. Add solution B dropwise...

Embodiment 2

[0031] Biochar loaded TiO of the present invention 2 The composite material is used to treat saffron red T in wastewater, comprising the following steps:

[0032] Get 50mL of saffron red T solution whose initial concentration is 100~500mg / L, add the biochar-loaded TiO prepared in Example 1 2 Composite materials, the amount of the adsorbent is 0.1g, and the photocatalytic reaction is carried out in a constant temperature incubator at 27°C. After 2 hours, the photocatalyst is separated from the waste water by centrifugation, and the untreated waste water in the waste water is measured at 530nm by a spectrophotometer. Degrade the content of saffron red T, the calculated degradation results are shown in table 1:

[0033] Table 1: Degradation data of photocatalyst under different initial concentrations of saffron T

[0034]

[0035] As can be seen from Table 1, the catalyst agent has a degradation capacity of 23.3 mg / g under the condition of 50 mg / L at the initial concentratio...

Embodiment 3

[0037]Biochar loaded TiO of the present invention 2 The composite material is used to treat saffron red T in wastewater, comprising the following steps:

[0038] Get 50mL initial concentration and be the saffron red T solution of 500mg / L, add the biochar loaded TiO that embodiment 1 makes 2 Composite materials, the amount of the catalyst is 0.05g, 0.1g, 0.15g, 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 is separated at 530nm by a spectrophotometer. Determination of the content of the undegraded saffron red T in the waste water, the calculated degradation results are shown in table 2:

[0039] Table 2: Degradation data of saffron red T under different catalyst amounts

[0040] Catalyst dosage (g) 0.05 0.1 0.15 Degradation amount (mg / g) 165.7 228.8 160.9

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

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Abstract

The invention relates to a preparation method and application of a TiO2-loaded biochar composite material.The composite material takes biochar as a base body, and the surface of the base body is loaded with calcined TiO2.The preparation method specifically comprises the steps that biomass powder is firstly immersed into an aqueous tetra-n-butyl titanate and absolute ethyl alcohol solution, then gel containing biomass is prepared, and finally the gel is pyrolyzed through a tubular atmosphere furnace in a N2 atmosphere to obtain the product.In the preparation process of the TiO2-loaded biochar composite material, pyrolysis of the biomass and calcination of the TiO2 are performed in the same heat treatment process, therefore, the preparation cost is reduced, and the preparation time is shortened.The product has the good degrading 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 biochar loaded TiO 2 Preparation methods and uses of composite materials. Background technique [0002] The discharge of industrial dye wastewater to water bodies has caused great harm to the environmental ecosystem. With the rapid development of industry, a large amount of dye pollutants are discharged into water bodies. These pollutants are large in quantity, slow in degradation rate, and have toxic or carcinogenic effects on humans and animals. Therefore, it is necessary to explore a cost-effective decolorization technology for industrial wastewater before discharge. General dye wastewater treatment methods include adsorption, photocatalytic degradation, biodegradation, and membrane filtration. Among them, photocatalytic technology has simple equipment, easy operation, no secondary pollution, and a wide range of applic...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J21/06C02F1/30
CPCB01J21/063B01J21/18C02F1/30C02F2101/308
Inventor 闫芝丽刘云国曾光明谭小飞顾岩岭刘少博李美芳周赞刘素江卢华
Owner HUNAN UNIV
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