Application of Photocatalytic Concrete Paint and its Effect of Decomposing Vehicle Exhaust

2013 ◽  
Vol 683 ◽  
pp. 98-105 ◽  
Author(s):  
Xiao Lun Wang ◽  
Li Ping Liu ◽  
Hai Ming Xu
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Performance ◽  
Catalytic Efficiency ◽  
Practical Application ◽  
Vehicle Exhaust ◽  
Decomposition Products ◽  
Road Engineering ◽  
Nanometer Titanium Dioxide ◽  
Photocatalytic Concrete ◽  
Different Content

With the widely research of Photocatalytic titanium dioxide, researchers have found another way of managing air quality. As an excellent photocatalyst material, nanometer titanium dioxide has begun to be used in road engineering in recent years. In this paper, at first, different content of titanium dioxide were dispersed evenly and separately in a kind of silane solvent to make the coating material with photocatalytic performance. The results show that nanometer titanium dioxide is able to decompose CO, HC, NO and CO2 after being dispersed in silane solvent. The results also show that a certain content oftitanium dioxide can be chosen after considering effect, workability and economic factors in practical application. Then the brushing method and the decomposition effect of the photocatalytic paint are discussed. The tests indicate that proper content of nanometer titanium dioxide with suitable brushing method can maximize catalytic efficiency. At last, in order to study the decomposition mechanism, using ion chromatography and chemical titration to analyze the decomposition products separately, the results prove that nanometer titanium dioxide can decompose NO, HC, CO and other harmful gases into nitrate and carbonate.

Application of Nano- TiO2 Used in Road Engineering and its Long-Term Decomposition Effect

2013 ◽  
Vol 662 ◽  
pp. 167-172 ◽  
Author(s):  
Xiao Lun Wang ◽  
Li Ping Liu ◽  
Hai Ming Xu
Keyword(s):  
Titanium Dioxide ◽  
Catalytic Effect ◽  
Asphalt Mixture ◽  
Catalytic Efficiency ◽  
Catalytic Decomposition ◽  
Uv Aging ◽  
Road Engineering ◽  
Nanometer Titanium Dioxide ◽  
Over Time

With the widely research of nano-TiO2, researchers have found another way of managing air quality. As an excellent photocatalyst material, nanometer titanium dioxide has begun to be used in road engineering in recent years. In this paper, substantial gas decomposition tests are performed utilizing the self-designed sealed container and UV aging box. At first, the catalytic efficiencies of nanometer titanium dioxide dispersed in silane solvent and in asphalt mixture were compared. The results show that nanometer titanium dioxide is able to decompose CO, HC and NO after being dispersed in silane solvent and asphalt mixture. To achieve the same catalytic efficiency, the amount of the nanometer titanium dioxide dispersed in silane solvent is much less than that in asphalt mixture. For asphalt mixture, high void fraction may mean high catalytic efficiency. Then the long-term decomposition of asphalt mixture was discussed. The asphalt mixture still has good catalytic decomposition effect after six months. The catalytic effect of asphalt mixture does not diminish over time and the effect of decomposing HC has improved after six months. At last, for cement paint, the catalytic effect of decomposing NO and HC does not diminish over time, but the effect of decomposing CO reduces.

scholarly journals Study on influencing factors of photocatalytic performance of CdS/TiO2 nanocomposite concrete

2020 ◽  
Vol 9 (1) ◽  
pp. 1160-1169
Author(s):  
Kang He ◽  
Yu Chen ◽  
Mengjun Mei
Keyword(s):  
High Temperature ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Catalytic Efficiency ◽  
High Energy ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Light Sources ◽  
Photocatalytic Efficiency ◽  
Photocatalytic Concrete

AbstractIn this study, a high-energy ball mill was used to composite nano-TiO2 and CdS, and three kinds of nanocomposite photocatalysts TiO2, CdS/TiO2-R400, and CdS/TiO2-R600 were prepared, which can respond to visible light. The photocatalytic concrete test block was prepared by mixing the nanocomposite photocatalyst and other masses with cement by incorporation method. To study the effect of the photocatalyst content on the photocatalytic performance of nanoconcrete, a total of four catalyst contents (0, 2%, 5%, and 8%) were set. The effects of high-temperature treatment (400°C) and different light sources (ultraviolet and visible light) on photocatalytic efficiency were also considered. The results show that the catalytic efficiency of CdS/TiO2-R400 under two light sources is higher than that of the other two photocatalysts. Compared to ultraviolet light sources, the photocatalytic efficiency of CdS/TiO2 nanocomposite concrete under visible light is lower, and the efficiency is below 9%. The optimal amounts of CdS/TiO2 nanocomposite photocatalyst under ultraviolet and visible light are 2% and 5%, respectively. The high-temperature treatment can improve the photocatalytic performance of CdS/TiO2 nanocomposite photocatalyst by 2% to 3%.

Research on the Application of Photocatalytic Coating Material with Function of Decomposing Vehicle Exhaust on Road Collision Wall

2011 ◽  
Vol 356-360 ◽  
pp. 415-422 ◽  
Author(s):  
Hai Ming Xu ◽  
Li Ping Liu ◽  
Li Jun Sun
Keyword(s):  
Titanium Dioxide ◽  
Coating Material ◽  
Exhaust Gas ◽  
Vehicle Exhaust ◽  
Decomposition Products ◽  
Uv Aging ◽  
Car Exhaust ◽  
Measurement Results ◽  
Middle Ring ◽  
Nano Titanium Dioxide

Studies have shown that nanometer Titanium dioxide is an excellent photocatalyst material, which owns environmental protection function of decomposing car exhaust, and it begins to be used in road works in recent years. In this paper, firstly a representative concentration ratio of each component in exhaust gas is reached according to statistical result from a large number of vehicle exhaust samples, and simulated gas used in laboratory test is prepared according to the ratio. Then substantial gas- decomposition tests are performed utilizing the self-designed sealed container and UV aging box. Applying ion chromatography to analyze the decomposition products, it is proved that nano-titanium dioxide can decompose NOx, HC, CO and other harmful gases into nitrate and carbonate. Subsequently, an excellent concrete protection materials- anticorrosive of silane solvent is selected as dispersion solvent, and a certain amount of titanium dioxide is dispersed evenly in the solvent to make the coating material with photocatalytic performance, the brushing method and decomposition effect of the coating material are discussed. In the end, a brushing method with better decomposition effect is applied on cement collision wall on middle ring in Pudong district, while nano-titanium is also contained in the surface layer of pavement; Field measurement results show that the decomposition of car exhaust effect is obvious.

scholarly journals New photocatalytic nano additives based on titanium dioxide and silica for self-cleaning concrete.

2020 ◽  
Vol 11 (3-2020) ◽  
pp. 145-151
Author(s):  
K. A. Pozhivina ◽  
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Uv Irradiation ◽  
Photocatalytic Performance ◽  
Industrial Wastes ◽  
Developed Surface ◽  
Nano Additives ◽  
Self Cleaning ◽  
Photocatalytic Concrete

In this article powdered composites of titanium dioxide and silica with high-developed surface(183–534 m2 / g), synthesized from industrial wastes, are considered as photocatalytic concrete additives. Their composition was studied, and the photocatalytic performance was evaluated by decomposition of the dye “Methylene blue” under UV-irradiation. The surfactant’s concentration at which the photocatalytic activity reaches its highest values was determined.

scholarly journals Research on road engineering detection method based on GPR technology

2020 ◽  
Vol 165 ◽  
pp. 04014
Author(s):  
Liu Tao ◽  
Li Jia ◽  
Zheng Zhi-gang ◽  
Huang Zhi ◽  
Jiang Jian ◽  
...  
Keyword(s):  
Parameter Setting ◽  
Non Destructive Testing ◽  
Practical Application ◽  
Distribution Law ◽  
Destructive Testing ◽  
Road Engineering ◽  
The Road ◽  
Image Optimization ◽  
Testing Technology ◽  
Non Destructive

GPR is an effective non-destructive testing technology. This paper introduces its composition principle and operation method, explains the process of parameter setting and image optimization, obtains the dielectric constant of 10000 points, compares it with the density, and then obtains the uniformity distribution law of construction quality based on image. By calibrating the thickness of the road surface, the effective detection of road diseases can be realized, and the theoretical basis and practical application conditions of GPR technology can be clarified.

Improved antimicrobial efficacy and photocatalytic performance of gold decorated titanium dioxide nanohybrid

Optik ◽  
2020 ◽  
Vol 224 ◽  
pp. 165515
Author(s):  
Suresh Sagadevan ◽  
Selvaraj Vennila ◽  
Lakshmipathy Muthukrishnan ◽  
Baranya Murugan ◽  
J. Anita Lett ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Performance ◽  
Antimicrobial Efficacy

Preparation, Characterization and its Photocatalytic Performance of Rare Earth Element Erbium Doped with TiO2 Material

2012 ◽  
Vol 568 ◽  
pp. 380-383
Author(s):  
Song Tian Li ◽  
Guo Xu He ◽  
Wei Ma ◽  
Yan Hua Liu
Keyword(s):  
Titanium Dioxide ◽  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Visible Region ◽  
Erbium Doped ◽  
Sol Gel Process ◽  
Reduce Energy Consumption

In order to expand photoresponse range of TiO2, reduce energy consumption of semiconductor material optical catalytic, certain amount of rare earth element Erbiun was doped during preparation of anatase titanium dioxide to improve the light absorption and photocatalysis efficiency. A series of rare earth element doped TiO2 material were prepared by sol-gel process, and characterized by means of UV-vis diffuse reflectance spectra. UV-vis absorption verified that doping of Er3+ enhanced absorptive capacity of catalyst in visible region. The photocatalytic performance of anatase titanium dioxide and rare earth element Erbiun doped with TiO2 to basic fuchsin were studied.

The Effects of Nanometer Titanium Dioxide on Tumor Cells and in Rats with Nasopharyngeal Carcinoma

2020 ◽  
Vol 12 (12) ◽  
pp. 1431-1437
Author(s):  
Hui Liu ◽  
Peng Zhang ◽  
Fang Zhang ◽  
Qing Liu
Keyword(s):  
Titanium Dioxide ◽  
Nasopharyngeal Carcinoma ◽  
Tumor Cells ◽  
Delivery System ◽  
Cellular Level ◽  
Disease Treatment ◽  
Nanometer Titanium Dioxide ◽  
Xenotransplantation Model ◽  
Proliferation And Invasion

A drug delivery system based on nanomaterials has demonstrated a powerful function in disease treatment. In this study, a titanium-dioxide-nanotube-based cisplatin (nano-TiO2-DDP) delivery system was designed, and its effects in rats with nasopharyngeal carcinoma (NPC) and on tumor cells were analyzed. First, we obtained electrochemistry anodic oxidation (EAO) for the preparation of Nnano-TiO2, which was adopted as the carrier of cisplatin (CDDP). Then, we used a scanning electron microscope (SEM) to characterize and study the surface morphology of nano-TiO2. At the cellular level, flow cytometry, MTT, and Transwell assays were performed to analyze the apoptosis, proliferation, and invasion of cells treated by nano-TiO2-DDP, respectively. At the animal level, a xenotransplantation model was established for evaluating tumor growth and changes in experimental animals after injection of nano-TiO2-DDP. As a result, nano-TiO2-DDP strongly suppressed the invasion and vitality of tumor cells, induced their apoptosis, and delivered DDP more efficiently than did systems without a nano-TiO2 structure. In addition, injected nano-TiO2-DDP strongly inhibited the growth of solid tumors in vivo. Therefore, we believe that nano-TiO2-DDP can effectively suppress the growth of NPC, and it is more efficient than conventional drugs.

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