Research On The Performance Of NO Degradation On Nanomaterials Fog Seal

With the rapiddevelopment of economy,the demand for public transportation increasesgreatly.That leads to theincrease of vehicles.Meanwhile the exhaust pollution in the city is becoming more and more serious.Itcauses an extremely disadvantageous influence in the sustainable development of city economy and the quality of life.Therefore,the study of automobile exhaust degradation of green environmental protection type pavement technology has become a new topic in road engineering.The semiconductor nano material for nitrogen oxides has a good photocatalytic degradation effect.Therefore,in this paper,we did the research onthe performance of optical catalytic degradation of NO,withthe sand fog sealing layer on the surface of the semiconductor nano material.Firstly,on the basis of the multi-function light catalytic cycle test system,the photocatalytic degradation was proposed through the test procedure.By comparing a series of test results,we explored the effects of different silane coupling agent,different activated carbon dosage,different dosage of coating materials and different particle size of quartz sand on photocatalytic degradation of NO.Afterthat,the optimum ratio of coating material component content was determined.Secondly,according to the best ratio of coating material component content respectively,there are three materials ascoating materials,such asnano TiO₂,nano SrTiO₃ and nanoCeO₂,which are respectivelysprayedon the surface of thesand fog seal.Through testingthe coating materials performance of NO photocatalytic degradationin photocatalytic reaction test device,itconfirmed the optimal dosage of these three kinds of materials in different particle size of sand fog seal surface.Then,under the same conditions,we determined the optimal nanophotocatalytic materialsby comparing three kinds of coating materials for NO degradation efficiency.Finally,we selected two sections of the test road,spraying the nano TiO₂ coating material on them by using the best proportion.By using cadmium reduction colorimetric method,quantitative and qualitative analysis was performed in the nitrate concentration from the field.Then the nitrate was irradiated with 507nm wavelength of ultraviolet radiation,at the same time,using the UV-Vis spectrophotometer on nitrate determination of color depth.Thus we can determine the effect of nano TiO₂ on nitrogen oxide degradation.