Preparation method of lanthanum-carbon co-doped modified titanium dioxide for degrading automobile exhaust gas

Abstract

The invention relates to a preparation method of lanthanum-carbon co-doped modified titanium dioxide for degrading automobile exhaust gas, and belongs to the technical field of pavement materials. Theproblems of large forbidden band width, only absorption of ultraviolet light, difficulty in utilization of sunlight, high photo-generated carrier recombination rate and low catalytic degradation efficiency of existing general TiO2 are solved in the invention. The method uses a lanthanum nitrate solution as a lanthanum source and a glucose solution as a carbon source, and comprises the following steps: taking methanol, adding the methanol into an inner container of a reactor, sequentially adding tetrabutyl titanate, the lanthanum nitrate solution, the glucose solution and lauric acid under theaction of a magnetic stirrer, performing uniform mixing, placing the inner container filled with the obtained mixed solution in the reactor, carrying out a reaction, cooling the obtained solution toroom temperature in order to obtain a solid precipitate, wash the solid precipitate with anhydrous ethanol, drying the washed solid precipitate, and testing the photocatalytic degradation effect of the lanthanum-carbon co-doped modified titanium dioxide on main components of the automobile exhaust gas by using simulated sunshine in order to determine optimal doping amounts of lanthanum and carbon.The above prepared photocatalyst has the advantages of high degradation efficiency, reduction of exhaust gas pollution, and improvement of the air quality.

Description

technical field [0001] The present invention is a lanthanum-carbon co-doped modified titanium dioxide (TiO 2 ) preparation method, which belongs to the technical field of pavement materials. Background technique [0002] Exhaust gas emitted by motor vehicles has become one of the main sources of urban air pollution, affecting people's health and air quality. Long-term exposure to automobile exhaust will directly stimulate the human respiratory tract, resulting in a decline in the immunity of the respiratory system. The low concentration of CO in the exhaust gas will combine with the human body's hemoglobin to form carbon monoxide hemoglobin. Once it exceeds 10%, it will have adverse effects on people. The research results show that automobile exhaust not only endangers human health, but also affects the ecological environment, causing environmental problems such as urban greenhouse effect, acid rain and urban photochemical smog. Common lead pollution (most of the lead poll...

AI Technical Summary

Problems solved by technology

[0008] The object of the invention is to provide a kind of lanthanum-carbon co-doped modified TiO for degrading automobile exhaust 2 The preparation method solves the current common TiO 2 Large band gap, can only absorb ultraviolet light, difficult to use sunlight, high photogenerated carrier recombination rate, low catalytic degradation efficiency, etc., to improve the effect of tail gas degradation and improve air quality