Vol.28 No.7 崔玉民等：功能材料二氧化钛光催化降解酸性黑染料 .629. of TiOzon its photocatalytic action.Chem Phys Lett.1991. [12]崔玉民，朱亦仁，何东宝.用复相光催化剂W0s/a下20/ 187(1/2):73 W深度处理造纸的研究.感光科学与光化学，2001,19 [9]Bickley I B.Gonzaler-Carreno T,Lees JS.et al.A structural (2):131 investigation of titanium dioxide photocatalysts.J Solid State [13]崔玉民，朱亦仁.光催化氧化脱除疏化物.燃料化学学 Chem,1991,92.178 报，2000,28(5)：468 [10]高伟，吴风清，罗臻，等.T02晶型与光催化活性的研究· [14]Matthews R W.Photooxidation of organic impurities in wa- 高等学校化学学报，2001,22(4)：660 ter using thin films of titanium dioxide.J Phys Chem,1987. [11]孙静，高濂，张青红制备具有光催化活性的金红石相纳米 91:3328 氧化钛粉体，化学学报，2003,61(1)：74 Photocatalytic degradation of acid black dyes by the functional material of titani- um oxide CUI Yumin,FAN Shaohua,SU Linghao Department of Chemistry.Fuyang Teachers College.Fuyang 236032.China ABSTRACT TiOz nanometer particles were prepared by the sol-gel process and characterized by X ray diffraction(XRD).Photocatalytic decomposition of acid black dyes was investigated in a cylinder type pho- toreactor made of quartz glass using a middle pressure Hg lamp as the light source.The effects of the calci- nation temperature,flow rate of air,pH of solution and illumination time on the photodegradation rate of acid black dyes were discussed.The results showed that the calcination temperature greatly enhanced the photocatalytic property of TiO2.Calcining the powders in air at 400C for 3h,the broad peaks of anatase type on the curves of XRD patterns of TiOz appeared.Calcining the powders in air at 500C for 3h.all crystal particles in TiOz changed the structure of anatase type,and the content of rutile type increased grad- ually along with the calcination temperature rising.Calcining the powders in air at 750C for 3h,all crystal particles in TiOz turned into the structure of rutile type.However,the crystal type of TiO2 did not change along with the calcination time prolonging at the same temperature.The photocatalytic activity of TiOz was the highest while calcining TiOzat 600C for 3h.Under the optimum conditions,the photocatalytic degra- dation rate of acid black dyes reached 100%with the illumination time of 140min. KEY WORDS titanium oxide;sol-gel process:acid black dyes:photocatalytic degradation;crystal typeof TiO2on its photocatalytic action．Chem Phys Lett‚1991‚ 187（1／2）：73 ［9］ Bickley I B‚Gonzaler-Carreno T‚Lees J S‚et al．A structural investigation of titanium dioxide photocatalysts．J Solid State Chem‚1991‚92：178 ［10］ 高伟‚吴凤清‚罗臻‚等．TiO2 晶型与光催化活性的研究． 高等学校化学学报‚2001‚22（4）：660 ［11］ 孙静‚高濂‚张青红．制备具有光催化活性的金红石相纳米 氧化钛粉体．化学学报‚2003‚61（1）：74 ［12］ 崔玉民‚朱亦仁‚何东宝．用复相光催化剂 WO3／α－Fe2O3／ W 深度处理造纸的研究．感光科学与光化学‚2001‚19 （2）：131 ［13］ 崔玉民‚朱亦仁．光催化氧化脱除硫化物．燃料化学学 报‚2000‚28（5）：468 ［14］ Matthews R W．Photooxidation of organic impurities in wa￾ter using thin films of titanium dioxide．J Phys Chem‚1987‚ 91：3328 Photocatalytic degradation of acid black dyes by the functional material of titani￾um oxide CUI Y umin‚FA N Shaohua‚SU L inghao Department of Chemistry‚Fuyang Teachers College‚Fuyang236032‚China ABSTRACT TiO2 nanometer particles were prepared by the so-l gel process and characterized by X-ray diffraction （XRD）．Photocatalytic decomposition of acid black dyes was investigated in a cylinder type pho￾toreactor made of quartz glass using a middle-pressure Hg lamp as the light source．The effects of the calci￾nation temperature‚flow rate of air‚pH of solution and illumination time on the photodegradation rate of acid black dyes were discussed．The results showed that the calcination temperature greatly enhanced the photocatalytic property of TiO2．Calcining the powders in air at 400℃ for3h‚the broad peaks of anatase type on the curves of XRD patterns of TiO2 appeared．Calcining the powders in air at 500℃ for 3h‚all crystal particles in TiO2changed the structure of anatase type‚and the content of rutile type increased grad￾ually along with the calcination temperature rising．Calcining the powders in air at750℃ for3h‚all crystal particles in TiO2turned into the structure of rutile type．However‚the crystal type of TiO2did not change along with the calcination time prolonging at the same temperature．The photocatalytic activity of TiO2was the highest while calcining TiO2at600℃ for3h．Under the optimum conditions‚the photocatalytic degra￾dation rate of acid black dyes reached100％ with the illumination time of 140min． KEY WORDS titanium oxide；so-l gel process；acid black dyes；photocatalytic degradation；crystal type Vol．28No．7 崔玉民等： 功能材料二氧化钛光催化降解酸性黑染料 ·629·