采用溶胶-凝胶法制备了锌掺杂 TiO2粉体(Zn-TiO2),采用 XRD、TEM、UV-Vis、PL 等方法对其进行表征和分析。结果表明,Zn 掺杂降低了 TiO2的相转变温度,拓展了 TiO2对可见光的吸收范围,有效地抑制了光生电子-空穴对的复合。光催化降解亚甲基蓝(MB)的实验表明,n(Zn)∶n(Ti)=0.045,400℃烧结的 Zn-TiO2粉体具有最佳光催化性能,在普通日光灯下对亚甲基蓝的降解率达95.77%,明显优于德国 Degussa 公司生产的 P25纯 TiO2光催化剂对亚甲基蓝的降解率44.95%。
Zn doped TiO2 powders (Zn-TiO2 )were synthesized by sol-gel method.The obtained powders were characterized by XRD,TEM,UV-Vis,PL,respectively.The results show that Zn-doping can decrease the phase transition temperature,broaden the absorption spectrum to the visible light region,and inhibit the re-combination of photoelectron-hole pairs.The experiments of photocatalytic degradation of methylene blue (MB)suggest that the photocatalytic activity of the Zn-TiO2 powders at n(Zn)∶n(Ti)=0.045 (molar ratio) and the calcinated temperature of 400 ℃ was the best.Under the fluorescent light irradiation,the degradation rate of the Zn-TiO2 sample to methyl blue reaches 95.77%,which was obviously higher than 44.95% of P25, the pure TiO2 photocatalyst made in Degussa,German.
参考文献
| [1] | Jose C. Conesa.Band structures and nitrogen doping effects in zinc titanate photocatalysts[J].Catalysis Today,2013:11-18. |
| [2] | Vorontson A V;Savinov E V;Davydo V L et al.Envi-ronmental applications of semiconductor photocatalysis[J].Applied Catalysis B:Environmental,2001,32:11-14. |
| [3] | 李哓俊,司德君,方均,姜志全,黄伟新.铁和铈共掺杂二氧化钛中的协同效应[J].化学物理学报,2006(06):539-542. |
| [4] | Ubonchonlakate K;Sikong L;Saito F et al.Photocata-lytic disinfection of P aeruginosa bacterial Ag-doped TiO2 film[J].Procedia Engineering,2012,32:656-662. |
| [5] | Fujishima, M.;Takatori, H.;Tada, H. .Interfacial chemical bonding effect on the photocatalytic activity of TiO_2-SiO_2 nanocoupling systems[J].Journal of Colloid and Interface Science,2011(2):628-631. |
| [6] | Ahed Zyoud;Nidal Zaatar;Iyad Saadeddin .Alternative natural dyes in water purification: Anthocyanin as TiO_2-sensitizer in methyl orange photo-degradation[J].Solid state sciences,2011(6):1268-1275. |
| [7] | Sharma SD;Singh D;Saini KK;Kant C;Sharma V;Jain SC;Sharma CP .Sol-gel-derived super-hydrophilic nickel doped TiO2 film as active photo-catalyst[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2006(1):40-46. |
| [8] | 邓芳,李越湘,罗旭彪,涂新满,曾桂生,王玫.煅烧温度、煅烧时间和Fe3+掺杂量对TiO2光催化性能的影响[J].材料导报,2010(10):83-86. |
| [9] | 唐小红,尹光福,郑昌琼,周大利.纳米TiO2晶型转化机制探讨[J].四川大学学报（自然科学版）,2010(05):1091-1095. |
| [10] | 黄东升,陈朝凤,李玉花,曾人杰.铁、氮共掺杂二氧化钛粉末的制备及光催化活性[J].无机化学学报,2007(04):738-742. |
| [11] | 高基伟,杨辉,申乾宏.光催化型TiO2溶胶的制备和分析[J].电子元件与材料,2006(08):39-40. |
| [12] | Choi W;Termin A;Hoffmann M R .The role of metal ion dopants in quantum-sized TiO2 correlation between photoreactivity and charge carrier recombination dynamic[J].Physical Chemistry,1994,98(03):13669-13679. |
| [13] | 何开棘,张圣军,丁慧,王开明.双元素共掺杂纳米TiO2的制备及光催化活性[J].辽宁科技大学学报,2008(03):235-239. |
| [14] | Lu Jiejun .Study on synthesis and photocatalytic activity of transition metal doped TiO2[D].Zhengzhou:Henan Normal University,2011. |
| [15] | 赵斯琴,郭敏,张梅,王习东,长山.Y~（3+）和Eu~（3+）离子共掺杂TiO_2纳米材料的制备及其光催化性能[J].北京科技大学学报,2010(03):355-359. |
| [16] | Wang Zhenhua .Preparation,characterization and photo-catalysis of doped modification of nanometer titanium di-oxide[D].Jinan:Shandong University,2007. |
| [17] | Wu Jing;Zhou Wenfang;Gao Pan et al.Preparation and properties on praseodymium doped nano-titanium di-oxide photocatalyst[J].Journal of Functional Materials,2010,41(04):562-565. |
| [18] | 孙明,魏锡文,胡小华.铁掺杂TiO2纳米粉的制备、表征及其光催化活性[J].材料导报,2007(z1):153-155. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%