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A graphitic carbon nitride modified emulsified pitch and its photocatalytic application

A technology of graphite phase carbon nitride and emulsified pitch, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effects of low cost, good compatibility and low cost

Active Publication Date: 2021-01-22
济南北方交通工程咨询监理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after searching a large number of patents and literature, it was found that the use of non-metallic semiconductor graphite phase carbon nitride photocatalytic materials to modify emulsified asphalt and use its products as cementing materials for thin-layer overlays and fog-sealing layers in pavement engineering, No patents have been reported to realize the real-time photocatalytic degradation of harmful pollutants in exhaust gas under the irradiation of sunlight

Method used

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  • A graphitic carbon nitride modified emulsified pitch and its photocatalytic application

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Experimental program
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Effect test

Embodiment 1

[0022] Graphite carbon nitride (g-C 3 N 4 ) Preparation of photocatalyst

[0023] (1) Weigh 10g of urea, cyanamide, dicyandiamide, and melamine respectively, and place them in four 50ml porcelain crucibles with lids. At the same time, place it in a muffle furnace, set the heating rate at 10°C / min, raise it to 550°C, and keep it warm for 2h.

[0024] (2) Grinding the collected product when the furnace is cooled to room temperature to obtain graphite phase carbon nitride with a particle size of 300nm-500nm, which is set aside.

Embodiment 2

[0026] Preparation of graphite phase carbon nitride modified emulsified pitch

[0027] In parts by weight (Kg): 100 parts of emulsified pitch, 9 parts of graphite phase carbon nitride, and 6 parts of water-based polymer (wherein the water-based polymer adopts polyacrylic acid emulsion).

[0028] (a) by the above-mentioned parts by weight, graphite phase carbon nitride is uniformly dispersed in the aqueous polymer solution under the action of ultrasonic waves;

[0029] (b) stirring and mixing the graphite-phase carbon nitride / water-based polymer obtained in step (a) and the emulsified pitch through a high-speed shearing machine to obtain the graphite-phase carbon nitride-modified emulsified pitch.

Embodiment 3

[0031] With g-C prepared by the method of embodiment 1 3 N 4 It is used as a raw material, mixed with emulsified asphalt and water-soluble polymer, and stirred and mixed by a high-speed shearing machine to obtain modified emulsified asphalt. See Table 1 for the specific raw material ratio and the automobile exhaust degradation effect of the thin-layer overlay prepared by emulsified asphalt.

[0032] Table 1: Photocatalytic efficiency of modified emulsified asphalt with different ratios

[0033]

[0034] The modified emulsified asphalt provided by the invention can effectively utilize visible light, has good photocatalytic effect, can effectively degrade nitrogen oxides and hydrocarbons in tail gas, and has a simple and convenient preparation method. The prepared modified emulsified asphalt can be used as a binder for thin-layer overlays, micro-surfacing, and mist-sealed layers.

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Abstract

The invention discloses graphite phase carbon nitride modified emulsified asphalt which comprises the following ingredients in parts by weight: 100 parts of emulsified asphalt, 5-10 parts of graphitephase carbon nitride and 2-6 parts of water-based polymer. The modified emulsified asphalt is prepared by dispersing graphite phase carbon nitride in the water-based polymer and mixing with emulsifiedasphalt in a high-speed shearing machine. The invention further discloses an application of the graphite phase carbon nitride modified emulsified asphalt in preparation of a cementing material of a highway thin overlay and a fog sealing layer for real-time photocatalytic degradation of harmful tail gas pollutants under light irradiation. Graphite phase carbon nitride is used for absorbing visiblelight in a solar spectrum for a photocatalytic reaction; pollutants such as nitric oxide, hydrocarbons and carbon monoxide in tail gas are catalyzed and removed; and the purpose of atmosphere purification can be effectively achieved.

Description

technical field [0001] The invention relates to a functional emulsified asphalt, in particular to a graphite phase carbon nitride modified emulsified asphalt and its photocatalytic application. Background technique [0002] Emulsified asphalt is a uniform and stable emulsion formed by heating viscous asphalt to flow state, and then forming micro-droplets dispersed in water with emulsifier-stabilizer under the action of mechanical force. In order to further improve the performance of emulsified asphalt, try a variety of modifiers to modify the emulsified asphalt, compatible with the two material characteristics of emulsified asphalt and modifiers, so that the road performance can be improved and improved. For example, polymer elastomers, such as SBS, SBR latex, natural rubber modified emulsified asphalt, polymer elastomers, such as EVA, polyisobutylene, polyethylene, polypropylene modified emulsified asphalt, greatly improve the application performance of emulsified asphalt ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L33/00C08K3/28B01J27/24
CPCB01J27/24B01J35/004C08L95/00C08L33/00C08K3/28
Inventor 庞来学孙海波唐新德冯正义王晓英胡秀颍陈建中
Owner 济南北方交通工程咨询监理有限公司
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