Efficient Degradation 4-Nitrophenol by Photocatalysis from Modified TiO₂ Doped Copper

【摘要】 In the present study,a film consisting of TiO₂ doped with copper was prepared for efficiently decomposing 4-nitrophenol（4-NP） by photocatalysis.The preparing process of TiO₂ doped with copper includes two procedures:preparing Ti（OH）₄ doped with copper and synthesizing anatase and rutile TiO₂ doped with copper.Ti（OH）₄ doped with copper could be achieved by hydrolyzing TiCl₄in the mixed solution containing deionized water and copper oxalate.The Ti（OH）₄ doped with copper can be gained successfully by the following procedures:rinsing,drying and vacuum drying.The Ti（OH）₄ doped with copper could be converted into anatase TiO₂ doped with copper and rutile TiO₂ doped with copper by incineration for 4.5 h at 723 and 1 073 K,respectively.Characterizations of anatase TiO₂ doped with copper and rutile TiO₂ doped with copper were determined by X-ray diffraction（XRD） and energy dispersion of X-ray（EDX）.Anatase and rutile TiO₂ doped with copper were dissolved in a mixed solution containing isopropanol and diethylamine.Stainless electrode was submerged into with the solutions,the film of TiO₂ was formed by drying the thin layer at a ramp rate of 3℃/min until 373 K,and this temperature was held for 1 h.The temperature of the oven was subsequently increased to a final temperature of 823 K at a ramp rate of 3℃/min,and was held at this value for 1 h.The stainless steel covered with modified TiO₂ film was utilized as the anode.The stainless steel mesh was used as the cathode.The cathode and anode were connected with the source and immersed into the solution with 100 mg/L 4-NP.The whole reaction on photocatalysis was perfectly carried out after ultraviolet radiation and aerator were run.The experimental results showed that:cracking ratio of 4-NP ring,the removal ratio of chemical oxygen demand（COD） and total organic carbon（TOC） were respectively more than 90%,80% and 80% within 2 h.Degradation of 4-NP implied its potential application in associated wastewater.更多还原

【Abstract】 In the present study,a film consisting of TiO₂ doped with copper was prepared for efficiently decomposing 4-nitrophenol（4-NP） by photocatalysis.The preparing process of TiO₂ doped with copper includes two procedures:preparing Ti（OH）₄ doped with copper and synthesizing anatase and rutile TiO₂ doped with copper.Ti（OH）₄ doped with copper could be achieved by hydrolyzing TiCl₄in the mixed solution containing deionized water and copper oxalate.The Ti（OH）₄ doped with copper can be gained successfully by the following procedures:rinsing,drying and vacuum drying.The Ti（OH）₄ doped with copper could be converted into anatase TiO₂ doped with copper and rutile TiO₂ doped with copper by incineration for 4.5 h at 723 and 1 073 K,respectively.Characterizations of anatase TiO₂ doped with copper and rutile TiO₂ doped with copper were determined by X-ray diffraction（XRD） and energy dispersion of X-ray（EDX）.Anatase and rutile TiO₂ doped with copper were dissolved in a mixed solution containing isopropanol and diethylamine.Stainless electrode was submerged into with the solutions,the film of TiO₂ was formed by drying the thin layer at a ramp rate of 3℃/min until 373 K,and this temperature was held for 1 h.The temperature of the oven was subsequently increased to a final temperature of 823 K at a ramp rate of 3℃/min,and was held at this value for 1 h.The stainless steel covered with modified TiO₂ film was utilized as the anode.The stainless steel mesh was used as the cathode.The cathode and anode were connected with the source and immersed into the solution with 100 mg/L 4-NP.The whole reaction on photocatalysis was perfectly carried out after ultraviolet radiation and aerator were run.The experimental results showed that:cracking ratio of 4-NP ring,the removal ratio of chemical oxygen demand（COD） and total organic carbon（TOC） were respectively more than 90%,80% and 80% within 2 h.Degradation of 4-NP implied its potential application in associated wastewater.更多还原