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Graphite-C3N4-doped TiO2-loaded expanded perlite floating type environment restoration material capable of removing organic pollutants and preparation method of environment restoration material

A technology of organic pollutants and expanded perlite, which is applied in the field of environmental restoration, can solve the problems of easy aggregation and sedimentation of TiO2, low photocatalytic efficiency, and difficult filtration and separation, etc., to achieve improved visible light adsorption, simple synthesis process, and controllable hydrolysis degree Effect

Inactive Publication Date: 2017-01-04
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, traditional g-C 3 N 4 Loaded titanium dioxide has some problems, such as powder or granular TiO2 is easy to aggregate and settle, and the utilization rate is low; it is not easy to filter and separate, and it is difficult to recycle; and g-C prepared by one-step method 3 N 4 / TiO 2 The photocatalytic efficiency is low, which is reflected in the examples of the present invention

Method used

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  • Graphite-C3N4-doped TiO2-loaded expanded perlite floating type environment restoration material capable of removing organic pollutants and preparation method of environment restoration material
  • Graphite-C3N4-doped TiO2-loaded expanded perlite floating type environment restoration material capable of removing organic pollutants and preparation method of environment restoration material
  • Graphite-C3N4-doped TiO2-loaded expanded perlite floating type environment restoration material capable of removing organic pollutants and preparation method of environment restoration material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take a certain amount of melamine, put a certain quality of melamine into an alumina crucible, and calcinate at 500°C for 2 hours in a nitrogen atmosphere, and then at 520°C for 2 hours. The obtained solid sample is ground to obtain g-C 3 N 4 . Its scanning electron microscope picture is as figure 1 As shown, the calcined melamine has a rod-like structure, and the diameter of the material is about 50nm.

[0031] Take 0.1g of g-C 3 N 4 Add 50mL rhodamine B solution to a 50mL quartz tube, absorb in dark for 1.5 h, and illuminate with 500w xenon lamp for 2h. Rhodamine B solution concentration: 10mg / L. And the UV bandgap width of the material is measured to be about 2.7eV, such as image 3 (a), consistent with the literature, has good absorption in the visible region. Such as image 3 (b), the degradation rate of rhodamine B was measured to be 80%.

example 2

[0033] Take 10ml of absolute ethanol and 5~7ml of titanium isopropoxide into a beaker and stir to obtain solution A. Add a certain amount of water to 0.5g of melamine and add 5~7ml of acetic acid to obtain solution B. Stir with a magnetic stirrer at room temperature. Put the 10-20 mesh expanded perlite particles obtained after washing, air-drying and sieving into solution A, and add solution B dropwise to the mixture of solution A and expanded perlite to obtain a stable and uniform transparent sol. Aging at room temperature for 24 hours; drying the perlite in a tube furnace under a nitrogen atmosphere (300-400ml / min) at 420°C for 1 hour to obtain C 3 N 4 -TiO 2 Loaded environmental remediation materials.

[0034] Take 0.1g of C 3 N 4 -TiO 2 Add @EP and 50mL rhodamine B solution into a 50mL quartz tube, absorb in dark for 1.5 h, and illuminate with 500w xenon lamp for 4h. Rhodamine B solution concentration: 10mg / L. Such as Figure 4 (a), the measured solid UV band gap i...

example 3

[0036] Take 10ml of absolute ethanol and 5~7ml of titanium isopropoxide into a beaker and stir to obtain solution A. Add a certain amount of water to 0.5g of melamine and add 5~7ml of acetic acid to obtain solution B. Stir with a magnetic stirrer at room temperature. Put the 10-20 mesh expanded perlite particles obtained after washing, air-drying and sieving into solution A, and add solution B dropwise to the mixture of solution A and expanded perlite to obtain a stable and uniform transparent sol. Aging at room temperature for 24 hours; drying the perlite in a tube furnace under an ammonia atmosphere (300-400ml / min) at 420°C for 1 hour to obtain C 3 N 4 -N-TiO 2 Loaded environmental remediation materials.

[0037] Take 0.1g of C 3 N 4 -N-TiO 2 Add @EP and 50mL rhodamine B solution into a 50mL quartz tube, absorb in dark for 1.5h, and illuminate with 500w xenon light for 4h. Rhodamine B solution concentration: 10mg / L. Such as Figure 5 (a), its measured solid UV band g...

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Abstract

The invention discloses a floating type environment restoration material which is obtained by doping TiO2 with g-C3N4 in different atmospheres and can remove organic pollutants and a preparation method of the environment restoration material. According to the principle that expanded perlite has light pores, can float on water, has the superhigh surface adsorption effect and has the very high degradation removing capacity on persistent organic pollutants and heavy metals, the principle of the expanded perlite is combined with the photocatalysis capacity of TiO2, the photocatalysis capacity of TiO2 is improved by doping g-C3N4, and then the novel environment restoration material which is easy to recycle and can be reused is prepared to be used for removing the organic pollutants and heavy metals in the environment.

Description

technical field [0001] The invention relates to an environmental restoration material for removing organic pollutants and heavy metals in water bodies and soil environments and a preparation method thereof, belonging to the field of environmental restoration. Background technique [0002] Currently, g-C 3 N 4 and TiO 2 There are few studies on compounding, and it is still in the preliminary research stage. Zhao et al. 3 N 4 As a carrier, g-C was prepared by hydrolysis 3 N 4 / TiO 2 Composite materials (Zhao S, Chen S, Yu H, et al. g-C 3 N 4 / TiO 2 hybrid photocatalyst with wide absorption wavelength range and effective photogenerated charge separation. Separation and Purification Technology, 2012, 99: 50-54.); Miranda et al synthesized g-C by dipping method 3 N 4 / TiO 2 Complex materials (Miranda C, Mansilla H, Yáñez J, et al. Improved photocatalytic activity of g-C 3 N 4 / TiO 2 composites prepared by a simple impregnation method. Journal of Photochemistry and ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F1/28C02F101/30C02F101/20
CPCC02F1/28C02F1/30B01J27/24C02F2305/10C02F2101/30C02F2101/20B01J35/39Y02W10/37
Inventor 王小治姜雅薛红波杨婷婷侯建华尹微琴封克
Owner YANGZHOU UNIV
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