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

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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

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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Example Embodiment

[0026] Example 1:

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

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

Example Embodiment

[0030] Example 2:

[0031] Biochar loaded TiO of the present invention 2 Composite material treatment of saffron T in wastewater includes the following steps:

[0032] Take 50mL of saffron T solution with an initial concentration of 100~500mg / L, and add the biochar-loaded TiO prepared in Example 1 2 Composite material, the amount of the adsorbent is 0.1g, the photocatalytic reaction is carried out in a constant temperature incubator at 27°C, the photocatalyst is separated from the waste water by centrifugation after 2 hours, and the waste water is determined by a spectrophotometer at 530nm. The content of degraded saffron T and the calculated degradation results are shown in Table 1:

[0033] Table 1: Photocatalyst degradation data under different initial concentrations of saffron T

[0034]

[0035] It can be seen from Table 1 that the catalyst has a degradation amount of 23.3mg / g under the condition of an initial concentration of 50mg / L, and it increases with the increase of the ini...

Example Embodiment

[0036] Example 3:

[0037] Biochar loaded TiO of the present invention 2 Composite material treatment of saffron T in wastewater includes the following steps:

[0038] Take 50 mL of saffron T solution with an initial concentration of 500 mg / L, and add the biochar-loaded TiO prepared in Example 1 2 Composite material, 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 waste water by centrifugation, using a spectrophotometer at 530nm The content of undegraded saffron T in the wastewater was determined, and the calculated degradation results are shown in Table 2:

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

[0040] Catalyst dosage (g)0.050.10.15 Degradation amount (mg / g) 165.7228.8160.9

[0041] It can be seen from Table 2 that under the condition of the initial concentration of 500 mg / L, the degradatio...

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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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