g-C3N4/TiO2 photocatalytic emulsified asphalt and preparation method thereof
A technology of emulsified asphalt, g-c3n4, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of reducing the efficiency of photocatalytic degradation of pollutants, poor application effect of asphalt pavement, and obstructing light sources. Contact with pollutants and other issues to achieve the effect of improving the photocatalytic efficiency
Inactive Publication Date: 2018-11-16
CHONGQING JIAOTONG UNIVERSITY
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Problems solved by technology
However, how to apply photocatalytic technology to effectively degrade exhaust pollutants in real life is still a challenge
At present, a photocatalytic pavement with the function of purifying vehicle exhaust is proposed. The main application methods include direct mixing method, coating method and surface spraying method. Poor application on pavement
This is due to the fact that photocatalytic materials are easily wrapped by black opaque asphalt, which hinders the contact with light source and pollutants, thus reducing the efficiency of photocatalytic degradation of pollutants.
Method used
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Embodiment 1
[0015] Embodiment 1 prepares g-C 3 N 4 / TiO 2 Photocatalytic emulsified asphalt
[0016] 1. Preparation of g-C by different methods 3 N 4 / TiO 2 Photocatalytic emulsified asphalt
[0017] g-C 3 N 4 / TiO 2 The composite photocatalyst adopts Wu Tao's method (g--C 3 N 4 Preparation of new asphalt pavement materials and research on the performance of photocatalytic degradation of automobile exhaust [D]. Chongqing Jiaotong University, 2017).
[0018] The types of emulsified asphalt include cationic emulsified asphalt, anionic emulsified asphalt and nonionic emulsified asphalt. The corresponding solid content test values of the emulsified asphalt used in this example are shown in Table 1.
[0019] Table 1 Three kinds of emulsified asphalt solid content test values used in this embodiment
[0020] Types of emulsified asphalt
Cationic emulsified asphalt
Anionic emulsified asphalt
Nonionic emulsified asphalt
Solid content (%)
48
50
...
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The invention discloses g-C3N4 / TiO2 photocatalytic emulsified asphalt. The g-C3N4 / TiO2 photocatalytic emulsified asphalt is composed of g-C3N4 / TiO2 composite photocatalyst and emulsified asphalt, wherein the mass of the g-C3N4 / TiO2 composite photocatalyst is 3-10% of the mass of the emulsified asphalt, or 100-800 g of the g-C3N4 / TiO2 composite photocatalyst is spread or sprayed on the surface of the emulsified asphalt per square meter. The invention also discloses a preparation method of the g-C3N4 / TiO2 photocatalytic emulsified asphalt. The g-C3N4 / TiO2 composite photocatalyst with a mass of 3-10% of the mass of the emulsified asphalt is directly mixed into the emulsified asphalt, and uniformly mixing is carried out, so that the g-C3N4 / TiO2 photocatalytic emulsified asphalt is obtained; orthe g-C3N4 / TiO2 composite photocatalyst is spread or sprayed on the surface of the emulsified asphalt, and then the g-C3N4 / TiO2 photocatalytic emulsified asphalt is obtained. According to the invention, the photocatalyst is exposed to the outside through the utilization of micro pores generated by the demulsification of the emulsified asphalt, and the contact of the photocatalyst with light and pollutants is increased, so that the photocatalytic efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of road engineering, in particular to a g-C 3 N 4 / TiO 2 Photocatalytic emulsified asphalt and its preparation method. Background technique [0002] While the increasing number of motor vehicles indicates the rapid development of social economy, the pollution caused by exhaust emissions also has a very bad impact on the environment on which people live. The main components in the exhaust gas such as CO, SO 2 , hydrocarbons, nitrogen oxides NO X etc. will cause the greenhouse effect, acid rain and urban photochemical smog. In recent years, the application of semiconductor photocatalysis technology in environmental governance has attracted much attention, and it has become an environmental protection technology with great development potential in the 21st century. However, how to apply photocatalytic technology to effectively degrade exhaust pollutants in real life is still a challenge. At present, a ph...
Claims
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IPC IPC(8): C08L95/00C08K3/28C08K3/22C09D7/61B01J27/24
CPCC08K3/22C08K3/28C09D7/61B01J27/24C08K2003/2241B01J35/39C08L95/00
Inventor 唐伯明曹雪娟杨晓宇朱洪洲邹晓翎邓梅
Owner CHONGQING JIAOTONG UNIVERSITY