Embedding photocatalytic titanium dioxide in asphalt surfaces to reduce pollutants via photocatalytic reactions

Abstract

Methods for embedding photocatalytic titanium dioxide in asphalt surfaces to reduce pollutants via photocatalytic reactions are provided herein. One method includes applying an amount of an asphalt surface treatment compound to an upper surface of the asphalt surface, the asphalt surface treatment compound including a mixture of a liquid carrier compound with a titanium dioxide (TiO 2 ) photocatalyst.

What is claimed is: 
     
       1. A method for treating an asphalt surface, the method comprising: impregnating an upper surface of the asphalt surface with an amount of an asphalt surface treatment compound, the asphalt surface treatment compound comprising a mixture of a liquid asphalt carrier compound with a titanium dioxide (TiO2) photocatalyst, wherein the liquid asphalt carrier compound includes a petroleum-based asphalt sealant uniformly penetrating to a predetermined depth throughout the asphalt surface and carrying the TiO2 photocatalyst throughout the predetermined depth of the asphalt surface. 
     
     
       2. The method according to  claim 1 , wherein the liquid asphalt carrier compound penetrates the asphalt surface down to between a depth range of approximately a quarter of an inch to approximately a half of an inch, inclusive, as measured from an upper surface of the asphalt surface, so as to distributively embed the titanium dioxide (TiO2) photocatalyst therein. 
     
     
       3. The method according to  claim 1 , further comprising texturing the upper surface of the asphalt surface. 
     
     
       4. The method according to  claim 1 , wherein the TiO2 photocatalyst comprises an anatase powder form of TiO2 nanoparticles that is mixed into the liquid asphalt carrier compound. 
     
     
       5. A method, comprising: impregnating an upper surface of the asphalt surface with a photocatalytic compound, the photocatalytic compound including a an asphaltic liquid asphalt carrier compound in which, wherein the photocatalytic compound penetrates the asphalt surface down to a predetermined depth of at least a quarter of an inch relative to an the upper surface of the asphalt surface, wherein the asphaltic liquid carrier compound includes a petroleum-based asphalt sealant uniformly penetrating to the predetermined depth throughout the asphalt surface and carrying the photocatalytic compound throughout the predetermined depth of the asphalt surface. 
     
     
       6. The method according to  claim 5 , further comprising selecting an, for the photocatalytic compound, the asphaltic carrier liquid for the photocatalytic compound carrier compound that reduces an amount of nitrogen oxides (NOx) and volatile organic compounds (VOC). 
     
     
       7. The method according to  claim 6 , further comprising mixing the photocatalytic compound by combining an the asphaltic liquid carrier compound with an amount of a titanium dioxide (TiO2) photocatalyst. 
     
     
       8. The method according to  claim 7 , wherein the TiO2 photocatalyst comprises an anatase powder form of TiO2 nanoparticles. 
     
     
       9. The method according to  claim 7 , wherein the asphaltic liquid carrier compound restores plasticity and durability of an asphalt binder of the asphalt surface. 
     
     
       10. The method according to  claim 5 , further comprising calculating an amount of asphalt surface treatment the asphaltic liquid carrier compound that is necessary to ensure that the asphalt surface is penetrated and embedded with the photocatalytic material compound to a sufficient the predetermined depth. 
     
     
       11. An asphalt surface treatment compound, comprising: an amount of an asphaltic liquid carrier compound mixed with an amount of a titanium dioxide (TiO2) photocatalyst, wherein the asphaltic liquid carrier compound penetrates an asphalt surface down to a predetermined depth of at least a quarter of an inch relative to an upper surface of the asphalt surface, the asphaltic liquid carrier compound impregnating the asphalt surface, wherein the asphaltic liquid carrier compound includes a petroleum-based asphalt sealant uniformly penetrating to the predetermined depth throughout the asphalt surface and carrying the TiO2 photocatalyst throughout the predetermined depth of the asphalt surface. 
     
     
       12. The asphalt surface treatment compound according to  claim 11 , wherein the TiO2 photocatalyst comprises an anatase powder form of TiO2 nanoparticles. 
     
     
       13. The asphalt surface treatment compound according to  claim 12 , wherein the asphaltic liquid carrier compound restores plasticity and durability of an asphalt binder of the asphalt surface.