A kind of composite material of titanium dioxide and charcoal and preparation method thereof

A titanium dioxide and composite material technology, applied in chemical instruments and methods, other chemical processes, chemical/physical processes, etc., can solve the problem of the decline of adsorption active sites and catalytic active sites, insufficient binding force between carbon materials and titanium dioxide, and reduction of carbon dioxide. Material active adsorption sites and other issues, to achieve high adsorption/catalysis synergistic effect, good adsorption/photocatalysis synergistic governance effect, and low cost

Active Publication Date: 2016-09-21
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] (1) The preparation of composite materials is basically divided into two steps. First, activated carbon, carbon black, and bamboo charcoal with strong adsorption capacity are obtained, and then the supported titanium dioxide is prepared by the direct loading method of titanium dioxide or the loading method of titanium dioxide precursor. The preparation process is complicated. In addition, the carbon materials used generally need to be activated, and the cost is high;
[0008] (2) The composite materials prepared by direct loading method using carbon materials and titanium dioxide as raw materials have the problem of insufficient binding force between carbon materials and titanium dioxide (direct mechanical mixing), or the addition of organic binders makes the adsorption active sites and Catalytic active sites have different degrees of decline;
[0009] (3) Titanium dioxide / carbon composite photocatalyst prepared by titanium dioxide precursor loading method, titanium dioxide nanopowder is generally coated on the surface of carbon material, and it is easy to cause pore blockage of carbon material, reducing the active adsorption sites of carbon material , so that the adsorption effect is significantly reduced, thereby affecting the catalytic activity

Method used

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  • A kind of composite material of titanium dioxide and charcoal and preparation method thereof
  • A kind of composite material of titanium dioxide and charcoal and preparation method thereof
  • A kind of composite material of titanium dioxide and charcoal and preparation method thereof

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Effect test

Embodiment 1

[0040] The mass percent of charcoal in the composite material of titanium dioxide and charcoal described in this embodiment is 38%, the microstructure of charcoal keeps the structure of wood tissue, titanium dioxide is evenly dispersed on the surface of charcoal, titanium dioxide has both anatase and rutile phases, The mass ratio of anatase and rutile is 82:28, and the particle size of titanium dioxide is 12nm.

[0041] The preparation method of the composite material of titanium dioxide and charcoal described in the present embodiment specifically comprises the steps:

[0042] (1) Pretreatment of woody biological templates: cut Paulownia into small pieces (length, width and height 50mm×20mm×20mm), then soak in 2mol / L nitric acid at 60°C for 12h, repeat twice, and then use absolute ethanol Immerse at 60°C for 12h, repeat 2 times, finally immerse with distilled water at 80°C for 12h, repeat 2 times, dry at 60°C for 12h;

[0043] (2) Preparation of titanium dioxide precursor so...

Embodiment 2

[0049] The mass percent of charcoal in the composite material of titanium dioxide and charcoal described in this embodiment is 30%, the microstructure of charcoal keeps the structure of wood structure, titanium dioxide is evenly dispersed on the surface of charcoal, titanium dioxide has anatase and rutile phase simultaneously, The mass ratio of anatase and rutile is 78:22, and the particle size of titanium dioxide is 15nm.

[0050] The preparation method of the composite material of titanium dioxide and charcoal described in the present embodiment specifically comprises the steps:

[0051] (1) Pretreatment of woody biological templates: Cut the thorn tree into small pieces (length, width and height 50mm×20mm×20mm), and then soak in 2mol / L nitric acid at 40°C for 6h, repeat twice, and then use anhydrous Soak in ethanol at 60°C for 6h, repeat twice, finally soak in distilled water at 40°C for 12h, repeat 3 times, dry at 40°C for 12h;

[0052] (2) Preparation of titanium dioxide...

Embodiment 3

[0058] The mass percent of charcoal in the composite material of titanium dioxide and charcoal described in this embodiment is 40%, the microstructure of charcoal keeps the structure of wood tissue, titanium dioxide is evenly dispersed on the surface of charcoal, and titanium dioxide has both anatase and rutile phases, The mass ratio of anatase and rutile is 75:25, and the particle size of titanium dioxide is 12nm.

[0059] The preparation method of the composite material of titanium dioxide and charcoal described in the present embodiment specifically comprises the steps:

[0060] (1) Pretreatment of woody biological templates Cut the thorn tree into small pieces (length, width and height 50mm×20mm×20mm), then soak in 2mol / L nitric acid at 40°C for 6h, repeat twice, and then use absolute ethanol Immerse at 60°C for 6h, repeat 2 times, finally immerse with distilled water at 40°C for 12h, repeat 3 times, dry at 40°C for 12h;

[0061] (2) Preparation of titanium dioxide precur...

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Abstract

The invention discloses a composite material of titanium dioxide and charcoal and a preparation method thereof, and belongs to the field of semiconductor photocatalysts; the microstructure of the carbon in the composite material of titanium dioxide and charcoal maintains the structure of wood tissue, and the titanium dioxide is uniformly dispersed on the surface of the charcoal. Titanium dioxide has both anatase and rutile phases; the method first pretreats the woody biological template; then the woody biological template is impregnated in the precursor solution, and the TiO 2 Particles are deposited in the micropores of the wooden formwork to obtain a woody biological template with titanium dioxide deposited, and finally roasted in a muffle furnace to obtain a titanium dioxide / charcoal composite photocatalyst; the composite material of titanium dioxide and charcoal prepared by the present invention can be used to remove The adsorption removal rate of environmental endocrine disruptors and other organic pollutants in water is 32.3-86.5%, the photocatalytic removal rate is 11-20%, and the total adsorption / photocatalytic synergistic removal rate can reach 50.3-97.5%. Good application prospects.

Description

technical field [0001] The invention relates to a composite material of titanium dioxide and charcoal and a preparation method thereof, belonging to the field of semiconductor photocatalysts. Background technique [0002] Environmental endocrine disruptors refer to exogenous substances that affect the normal maintenance of organisms and endanger reproduction, development or behavior due to their involvement in the synthesis, secretion, transport, combination, reaction and metabolism of hormones in organisms. They have toxicity persistence, hazard potential and bioaccumulation, and have the characteristics of wide pollution range, strong hydrophobicity and low concentration (usually in ng / L). They can be enriched and amplified step by step through the food chain. The way to enter the human body and cause health hazards has become a hot spot and difficulty in environmental governance. [0003] Titanium dioxide photocatalytic technology is a new "environmentally friendly" wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J20/20B01J20/32C02F1/28C02F1/32
Inventor 潘学军罗利军张学嘉杨晔林澎袁波蒋峰芝
Owner KUNMING UNIV OF SCI & TECH
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