Titanium based titanium dioxide （TiO2） nanotube arrays were prepared by electrochemical oxidation method, their microstructures were characterized, and the effects of sintering temperature and initial dye concentrat...Titanium based titanium dioxide （TiO2） nanotube arrays were prepared by electrochemical oxidation method, their microstructures were characterized, and the effects of sintering temperature and initial dye concentration and pH value on degradation performance of TiO2 nanotubc arrays wcrc investigated with methyl orange as a degradation object. The results showed that TiO2 nanotube arrays prepared by sintering at 500 ℃ exhibited good morphology and the highest photocata- lyric degradation efficiency; the degradation efficiency of the TiO2 nano material （500 ℃ ） to high concentration dye was higher than that to low concentration dye; the TiO2 nanotube array （500 ℃ ） exhibited higher degradation efficiency on dye solution at the pH of 3 than on that at the pH of 5.77 ; and the degradation efficien- cy of the TiO2 nanotube array （500 ℃） to 10 mg/L methyl orange solution （pH =3） reached 85.2%.展开更多
La-doped TiO2 nanopowders were synthesized via sol-gel process,and X-ray diffraction(XRD),UV-visble absorption spectra techniques were applied to investigated thes phase structure and spectrum properties as-synthesize...La-doped TiO2 nanopowders were synthesized via sol-gel process,and X-ray diffraction(XRD),UV-visble absorption spectra techniques were applied to investigated thes phase structure and spectrum properties as-synthesized samples.The influence of La3+ doping on the structure and phase transformation behaviors of anatase to rutile TiO2 powders was investigated by means of XRD.UV-vis adsorption spectroscopy revealed that La-doped TiO2 has a strong a adsorption band and the absorption edge were red-shifted compartion with pure TiO2.The experiment results of photocatalytic decomposition of methyl-organge indicated that La-doping restrained the transformation of anatase to rutile and growth of grain.Therefore,La-doping improved the TiO2 photocatalytic activity in photodegradation of methyl-organge.In addition,experiments also illustrate that the catalyst has good activity of decolor rate of Yan’an cigarette factory wastewater.展开更多
基金Supported by Fund for Young and Middle-aged Teachers in Fujian Province(JA15880)National Spark Program Project(2015GA721002)
文摘Titanium based titanium dioxide （TiO2） nanotube arrays were prepared by electrochemical oxidation method, their microstructures were characterized, and the effects of sintering temperature and initial dye concentration and pH value on degradation performance of TiO2 nanotubc arrays wcrc investigated with methyl orange as a degradation object. The results showed that TiO2 nanotube arrays prepared by sintering at 500 ℃ exhibited good morphology and the highest photocata- lyric degradation efficiency; the degradation efficiency of the TiO2 nano material （500 ℃ ） to high concentration dye was higher than that to low concentration dye; the TiO2 nanotube array （500 ℃ ） exhibited higher degradation efficiency on dye solution at the pH of 3 than on that at the pH of 5.77 ; and the degradation efficien- cy of the TiO2 nanotube array （500 ℃） to 10 mg/L methyl orange solution （pH =3） reached 85.2%.
文摘La-doped TiO2 nanopowders were synthesized via sol-gel process,and X-ray diffraction(XRD),UV-visble absorption spectra techniques were applied to investigated thes phase structure and spectrum properties as-synthesized samples.The influence of La3+ doping on the structure and phase transformation behaviors of anatase to rutile TiO2 powders was investigated by means of XRD.UV-vis adsorption spectroscopy revealed that La-doped TiO2 has a strong a adsorption band and the absorption edge were red-shifted compartion with pure TiO2.The experiment results of photocatalytic decomposition of methyl-organge indicated that La-doping restrained the transformation of anatase to rutile and growth of grain.Therefore,La-doping improved the TiO2 photocatalytic activity in photodegradation of methyl-organge.In addition,experiments also illustrate that the catalyst has good activity of decolor rate of Yan’an cigarette factory wastewater.
