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Photocatalytic composite material taking coal ash hollow microspheres as substrate and preparation method of photocatalytic composite material

A technology of hollow microspheres and composite materials, applied in the field of photocatalytic materials, can solve problems such as numerous steps and complicated operations, and achieve the effects of high photocatalytic activity, short preparation process and effective treatment

Inactive Publication Date: 2013-11-13
SHANGHAI HUAMING HI TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN102199004 discloses a directional growth of TiO on the surface of hollow microspheres after the sol-gel process 2 The preparation method of nanorods, which uses tetrabutyl titanate and toluene solvent to make sol, after repeated operations of stirring, filtering and washing, high-temperature calcination, and coats a layer of TiO on the surface of hollow glass microspheres 2 Thin film, after sol-gel coating treatment, hydrothermal method grows TiO on the surface of the film layer 2 Nanorods, this method has many steps and complicated operation

Method used

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  • Photocatalytic composite material taking coal ash hollow microspheres as substrate and preparation method of photocatalytic composite material
  • Photocatalytic composite material taking coal ash hollow microspheres as substrate and preparation method of photocatalytic composite material
  • Photocatalytic composite material taking coal ash hollow microspheres as substrate and preparation method of photocatalytic composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Measure 15 mL of absolute ethanol and add it to a 100 mL beaker, add 1.8 mL of tetrabutyl titanate dropwise and stir for 15 minutes, then add 30 mL of hydrochloric acid with a weight concentration of 37%, stir for 15 minutes, then add deionized water dropwise until the total volume of the mixed solution is 60 mL.

[0036] Take by weighing 1.2g fly ash hollow microspheres (the XRD spectrogram is shown in figure 1 ), added to the above mixed solution, and then transferred to a 100mL hydrothermal reaction kettle, heated to 180°C and kept for 8h. Cool the product to room temperature, then filter with suction, wash with ethanol, wash with deionized water, and dry at 50°C for 15 hours to obtain TiO grown on the surface of fly ash hollow microspheres. 2 nanorods, XRD tests show that TiO 2 The crystal form of nanorods is rutile (see figure 2 ), SEM photographs show TiO 2 The length of the nanorod is 0.5 ~ 1 μm, and the diameter is less than 100nm (see image 3 ).

Embodiment 2

[0038] Measure 12 mL of absolute ethanol and add it to a 100 mL beaker, add 1.8 mL of titanium tetrachloride dropwise and stir for 15 min, then add 30 mL of hydrochloric acid with a weight concentration of 37%, stir for 15 min, then add deionized water dropwise until the total volume of the mixed solution is 60 mL.

[0039] Weigh 1.2g of fly ash hollow microspheres (same as Example 1), add to the above mixed solution, then transfer to a 100mL hydrothermal reaction kettle, heat to 210°C and keep it warm for 4h. Cool the product to room temperature, then filter with suction, wash with ethanol, wash with deionized water, and dry at 80°C for 6 hours to obtain TiO grown on the surface of fly ash hollow microspheres. 2 Nano stave. SEM photo shows TiO 2 The length of the nanorod is 1-1.5 μm, and the diameter is less than 100 nm (see Figure 4 ).

Embodiment 3

[0041] The same method as in Example 1, except that 21mL of concentrated nitric acid with a weight concentration of 65% is used instead of concentrated hydrochloric acid with a weight concentration of 37%, to obtain TiO grown on the surface of fly ash hollow microspheres. 2 The length of the nanorods is 1-1.3 μm.

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Abstract

The invention provides a photocatalytic composite material taking coal ash hollow microspheres as a substrate and a preparation method of the photocatalytic composite material. The photocatalytic composite material taking the coal ash hollow microspheres as the substrate consists of the coal ash hollow microspheres and TiO2 nanorods growing on the surface of the coal ash hollow microspheres; the grain diameter of the coal ash hollow microspheres is 30-60Mum; the TiO2 nanorods are in the type of rutile, the length of the TiO2 nanorods is 0.1-1.5Mum, and the diameter of the TiO2 nanorods is 20-100nm. According to the invention, the preparation process flow is short and easy to control, and the photocatalytic composite material taking coal ash hollow microspheres has the characteristics of being large in specific surface area, high in photocatalytic activity, light in weight, floatable, dispersable, easy to recycle and the like, and can be used for effectively treating organic pollutants in water when being used as a photocatalytic material.

Description

technical field [0001] The invention relates to a photocatalytic composite material based on fly ash hollow microspheres and a preparation method thereof, and the synthesized product is particularly suitable for being used as a photocatalytic material. Background technique [0002] with traditional TiO 2 Nanoparticles compared to one-dimensional nano-TiO 2 (nanotubes, nanorods, nanowires, nanobelts, etc.) can effectively reduce the recombination probability of photogenerated electrons and increase the ratio of photogenerated electrons and holes due to their large aspect ratio, strong adsorption capacity and directional electron conduction ability. The effective utilization rate can enhance its photocatalytic activity and photoelectric conversion characteristics, and it has broad application prospects in photocatalytic degradation of organic pollutants, photocatalytic hydrogen production, solar cells, gas sensors and biosensors. Hollow glass microspheres have been widely us...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J21/06B01J35/08
Inventor 宣绍峰严雯静吴秋芳蔡梦军
Owner SHANGHAI HUAMING HI TECH GRP
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