High-performance self-cleaning coatings are highly desired by the industry and market.Herein,we synthesized two kinds of ultrafine TiO2 nanocrystals,one is anatase dots with a diameter of 5 nm,and the other is rutile ...High-performance self-cleaning coatings are highly desired by the industry and market.Herein,we synthesized two kinds of ultrafine TiO2 nanocrystals,one is anatase dots with a diameter of 5 nm,and the other is rutile rods with 1.5 nm in width and 7 nm in length.The prepared TiO:nanocrystal is highly dispersed and stable in water over a month.The coating can be fabricated via a simple spraving method,displaying excellent optical properties and photocatalytic performance on self-cleaning and surrounding environment remediation.The transmittance of glass remains 80%-90%for visible and near-infrared light after 30 cycles of spray.RhB solution(50 mg/L)was applied to the coating surface and form a solid RhB layer was formed,which can be completely removed in 30 min's light irradiation.RhB aqueous solution(100 mL,5 mg/L)was purified after 180 min by a 10 cm×10 cmglass,on which the coating was sprayed 30 times.The concentrations of formaldehyde and PM2.5 in surrounding air displayed a significant decrease along 50 min's monitoring.This high-performance coating shows great potential for constructing functional coating on various substrates for industrial applications.展开更多
The self-cleaning glass coated with Fe3+-TiO2 photocatalytic thin film was prepared by sol-gel process from the system Ti（OC4H9）4-NH（C2H4OH）2-C2H5OH-H2O containing FeCl3. The microstructure and properties of the f...The self-cleaning glass coated with Fe3+-TiO2 photocatalytic thin film was prepared by sol-gel process from the system Ti（OC4H9）4-NH（C2H4OH）2-C2H5OH-H2O containing FeCl3. The microstructure and properties of the film were studied using differential thermal analysis-thermogravimetry（DTA-TG）, X-ray diffration（XRD） and scanning electron microscope（SEM）. The transmittance of the self-cleaning glass was measured by using UV-Vis spectrometer. The effects of content of Fe3+ and the thickness of Fe3+-TiO2 thin film on the photocatalytic activity were examined. The results show that the photocatalytic thin films are mainly composed of Fe3O4 and TiO2 particles within 10100 nm. The appropriate amount of Fe3+ is effective for improving the photocatalytic activities of TiO2. The best photocatalytic activity is obtained when the molar ratio of Fe3+ to TiO2 is 0.005 and the glass is coated with 9 layers.展开更多
TiO2-CeO2 films were deposited on soda-lime glass substrates at varied substrate temperatures by rf magnetron sputtering using 40% molar TiO2-60% molar CeO2 ceramic target in Ar：O2=95：5 atmosphere.The structure,surf...TiO2-CeO2 films were deposited on soda-lime glass substrates at varied substrate temperatures by rf magnetron sputtering using 40% molar TiO2-60% molar CeO2 ceramic target in Ar：O2=95：5 atmosphere.The structure,surface composition,UV-visible spectra of the films were measured by scanning electron microscopy and X-ray diffraction,and X-ray photoelectron spectroscopy,respectively.The experimental results show that the films are amorphous,there are only Ti^4＋ and Ce^4＋ on the surface of the films,the obtained TiO2-CeO2 films shou a good uniformity and high densification,and the films deposited on the glass can shield ultraviolet light without significant absorpition of visible light,the films deposited on substrates at room temperature and 220℃ absorb UV effectively.展开更多
基金Supported by the Beijing Municipal High-level Innovative Team Building Program,China(No.IDHT20180504)the Beijing Out-standing Young Scientists Program,China(No.BJWZYJH0201910005017)+4 种基金the National Natural Science Foundation of China(Nos.21805004,21671011,21872001 and 51801006)the Beiing Natural Science Foundation,China(Nos.KZ201710005002 and 2192005)the China Postdoctoral Science Foundation(No.2018M641133)the Beiing Postdoctoral Research Foundation,China(Nos.2018-ZZ-021,2020-ZZ-041)the Chaoyang District Postdoctoral Research Foundation of Beijing,China(No.2018-ZZ-026).
文摘High-performance self-cleaning coatings are highly desired by the industry and market.Herein,we synthesized two kinds of ultrafine TiO2 nanocrystals,one is anatase dots with a diameter of 5 nm,and the other is rutile rods with 1.5 nm in width and 7 nm in length.The prepared TiO:nanocrystal is highly dispersed and stable in water over a month.The coating can be fabricated via a simple spraving method,displaying excellent optical properties and photocatalytic performance on self-cleaning and surrounding environment remediation.The transmittance of glass remains 80%-90%for visible and near-infrared light after 30 cycles of spray.RhB solution(50 mg/L)was applied to the coating surface and form a solid RhB layer was formed,which can be completely removed in 30 min's light irradiation.RhB aqueous solution(100 mL,5 mg/L)was purified after 180 min by a 10 cm×10 cmglass,on which the coating was sprayed 30 times.The concentrations of formaldehyde and PM2.5 in surrounding air displayed a significant decrease along 50 min's monitoring.This high-performance coating shows great potential for constructing functional coating on various substrates for industrial applications.
文摘The self-cleaning glass coated with Fe3+-TiO2 photocatalytic thin film was prepared by sol-gel process from the system Ti（OC4H9）4-NH（C2H4OH）2-C2H5OH-H2O containing FeCl3. The microstructure and properties of the film were studied using differential thermal analysis-thermogravimetry（DTA-TG）, X-ray diffration（XRD） and scanning electron microscope（SEM）. The transmittance of the self-cleaning glass was measured by using UV-Vis spectrometer. The effects of content of Fe3+ and the thickness of Fe3+-TiO2 thin film on the photocatalytic activity were examined. The results show that the photocatalytic thin films are mainly composed of Fe3O4 and TiO2 particles within 10100 nm. The appropriate amount of Fe3+ is effective for improving the photocatalytic activities of TiO2. The best photocatalytic activity is obtained when the molar ratio of Fe3+ to TiO2 is 0.005 and the glass is coated with 9 layers.
文摘TiO2-CeO2 films were deposited on soda-lime glass substrates at varied substrate temperatures by rf magnetron sputtering using 40% molar TiO2-60% molar CeO2 ceramic target in Ar：O2=95：5 atmosphere.The structure,surface composition,UV-visible spectra of the films were measured by scanning electron microscopy and X-ray diffraction,and X-ray photoelectron spectroscopy,respectively.The experimental results show that the films are amorphous,there are only Ti^4＋ and Ce^4＋ on the surface of the films,the obtained TiO2-CeO2 films shou a good uniformity and high densification,and the films deposited on the glass can shield ultraviolet light without significant absorpition of visible light,the films deposited on substrates at room temperature and 220℃ absorb UV effectively.
