| 629 | 92 | 31 |
| 下载次数 | 被引频次 | 阅读次数 |
用电子自旋共振（ＥＳＲ） 方法，研究（ 稀土元素，银）／ＴｉＯ２ 纳米光催化材料（Ｍ／ＴｉＯ２） 在紫外光照射前后羟基自由基（·ＯＨ） 信号强度的变化规律． 结果表明：在Ａｇ／ＴｉＯ２ 系材料中加入稀土元素后，不论紫外光照射与否，羟基自由基信号均增强，光催化活性增加；材料（Ｍ／ＴｉＯ２） 经８００ ℃热处理后，羟基自由基信号减弱，光催化活性降低．
Abstract：The signal of hydroxylic radical (·OH), produced in (Re,Ag)/TiO 2 nanometer photocatalystic materials (M/TiO 2) with and without ultraviolet light, was studied by electron spin resonance (ESR). Results show that the signal intensity of hydroxylic radical increases after doping rare earth elements into Ag/TiO 2, whether or not ultraviolet ligth exists, and then the photocatalystic activity will be improved. The signal intensity of hydroxylic radical decreases after M/TiO 2 nanometer photocatalystic materials have been annealed at 800 ℃, and then the photocatalystic activity will decrease.
1 Fujishima A, Honda K.Electrochemicalphotolysis of water ata semiconductorelectrode. Nature,1972 ,238:37～38
2 Wei C,Lin W,ZainalZ,etal.Bactericidalactivity ofTiO2photocatalystinaqueous media:toward asolar_assisted waterdisinfection system .Environ Sci & Technol,1994 ,28:934 ～938
3 Hoffman MR, Martin ST,Choi W,etal.Environmentalapplications ofsemiconductorphotocatalysis.Chem Rev,1995 ,95(1) :69 ～96
4 Linsebigler AL,Lu G,YatesJTJr.Photocatalysis on TiO2 surfaces:principle, mechanisms,and selected results.Chem Rev,1995 ,95(3):735～758
5 Canela MC,Alberici RM,Jardim WF.Gas_phase destruction of H2Susing TiO2/UV- VIS.JPhotochem & Photobio A:Chem ,1998 ,112 :73～80
6 方 锐. M/TiO2 光催化抗菌建筑材料的研究:[ 硕士论文] . 北京:中国建筑材料科学研究院,1996
7 Jin Z,Liang J,Fang R,etal.Building materials withfunction ofaircleaning .In:The Society of Non_TraditionalTechnology ed .Proceedings ofthe Third International Conference on Ecomaterials.Tsukuba:[s.n.] ,1997 .201～205
8 Fang R,Zhang R,Jin Z,etal.TiO2photocatalystantibacterialfilmsand productsusedforcleaningofindoorenvironment.In:TheSociety of Non_Traditional Technology ed .Proceedings ofthe Third International Conference on Ecomaterials.Tsukuba:[s.n.] ,1997 .6 ～12
9 金宗哲,梁金生,王 静,等. 无机抗菌材料. 见:中国硅酸盐学会编. 陶瓷玻璃工业指南′98 ,中国硅酸盐学会手册Vol4. 北京:中国建材工业出版社,1998.21～23
10 Wang J,Jin Z,LiangJ,etal.Antibacterialand cleaning effects of ABPceramics.In: Guan Zed .CICC- 1 Proceedings,TheFirst China International Conference on High_Performance Ceramics, Beijing,1998 ,Beijing:Tsinghua University Press,1999(inpress)
11 Liang J,Jin Z, WangJ,etal.Effectsof TiO2film photocatalysttileson growth ofexperimentalanimals.In :Guan Zed .CICC-1 Proceedings,The First ChinaInternational Conferenceon High_Performance Ceramics,Beijing,1998,Beijing:Tsinghua University Press,1999(in press) .
基本信息:
中图分类号:TB39
引用信息:
[1]梁金生,金宗哲,王静,王毅敏.环境净化功能M/TiO_2纳米材料光催化活性的研究[J].硅酸盐学报,1999(05):601-604.
基金信息:
北京自然科学基金;建筑材料工业基础研究资助
1999-10-26
1999-10-26