采用溶胶-凝胶法制备了Co掺杂TiO2粉体(Co-TiO2),采用 XRD、FT-Raman、UV-Vis、PL 等方法对其进行表征和分析。结果表明,Co 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 (Co)∶n (Ti)=0.002,400℃烧结的 Co-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90.56%,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%。
Co doped TiO2 powder (Co-TiO2 )were synthesized by sol-gel method.The obtained samples were characterized by XRD,FT-Raman,UV-Vis,PL,respectively.The results show that Co-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)indicate that the photocatalytic activity of the Co-TiO2 powder prepared at n(Co)∶n(Ti)=0.002 and the calcinated temperature of 400 ℃ was the best.Under the fluorescent light irradiation,the degradation rate of the Co-TiO2 sample to methyl blue reaches 90.56%,which was obviously higher than 44.95% of P25 TiO2 photocatalyst which 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] | Benjamin J. Morgan;Graeme W. Watson .Intrinsic n-type Defect Formation in TiO2: A Comparison of Rutile and Anatase from GGA+U Calculations[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2010(5):2321-2328. |
| [3] | Reyes-Coronado D;Rodriguez-Gattorno G;Espinosa-Pesqueira ME;Cab C;de Coss R;Oskam G .Phase-pure TiO2 nanoparticles: anatase, brookite and rutile[J].Nanotechnology,2008(14):145605-1-145605-10-0. |
| [4] | 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. |
| [5] | Iwasaki M.;Kawada H.;Tada H.;Ito S.;Hara M. .Cobalt ion-doped TiO2 photocatalyst response to visible light[J].Journal of Colloid and Interface Science,2000(1):202-204. |
| [6] | M. Subramanian;S. Vijayalakshmi;S. Venkataraj;R. Jayavel .Effect of cobalt doping on the structural and optical properties of TiO_2 films prepared by sol-gel process[J].Thin Solid Films,2008(12):3776-3782. |
| [7] | 赵宗彦,柳清菊,张瑾,朱忠其.3d过渡金属掺杂锐钛矿相TiO2的第一性原理研究[J].物理学报,2007(11):6592-6599. |
| [8] | Dong Gang;Zhu Zhongqi;Liu Qingju et al.Preparation and characterization and the photocatalytic activity of nanoparticle TiO2 codoped with iron and nitrogen[J].Journal of Functional Materials,2011,42(12):2217-2220. |
| [9] | 苏碧桃,张彰,郑坚,苏致兴.Fe3+掺杂的TiO2纳米复合粒子的合成及表征[J].化学学报,2002(11):1936-1940. |
| [10] | 谌攀,曹江林,冷文华,王建明.掺钴氧化钛电极的制备、表征及其光电性能[J].化学物理学报,2003(04):307-311. |
| [11] | 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. |
| [12] | 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. |
| [13] | Suryanamyanan R;Naik V M;Kharel P et al.Ferro-magnetism at 300 K in spin-coated films of Co doped an-atase and rutile-TiO2[J].Solid State communications,2005,133(07):439-443. |
| [14] | 刘立华,王璐,张勇,华中,徐帅.退火温度对Ti0.95Fe0.05O2纳米颗粒结构和磁性的影响[J].光散射学报,2011(02):125-128. |
| [15] | Bersani D.;Ding XZ.;Lottici PP. .Phonon confinement effects in the Raman scattering by TiO2 nanocrystals[J].Applied physics letters,1998(1):73-75. |
| [16] | 王建强,辛柏福,于海涛,谢玉涛,赵冰,付宏刚.二氧化钛系列光催化剂的拉曼光谱[J].高等学校化学学报,2003(07):1237-1240. |
| [17] | Jianping Xu;Shaobo Shi;Lan Li;Xiaosong Zhang;Yaxin Wang;Ximing Chen;Jianfeng Wang;Liya Lv;Fengming Zhang;Wei Zhong .Structural, optical, and ferromagnetic properties of Co-doped TiO_(2) films annealed in vacuum[J].Journal of Applied Physics,2010(5):053910-1-053910-6. |
| [18] | 刘慧,孙晓君,孙苗,张艳,薛宾泰,刘毅.钻掺杂锐钛矿二氧化钛能带结构的第一性原理计算[J].硅酸盐学报,2011(10):1617-1621. |
| [19] | Zhong Xuechun .Experimental and theoretical study on transition metal ion doped TiO2[D].Guangzhou:Guangdong University of Technology,2011. |
| [20] | 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. |
| [21] | 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. |
| [22] | 刘秀华,何小波,傅依备.Co掺杂对TiO2光催化剂结构与性能的影响[J].化学学报,2008(14):1725-1730. |
| [23] | 袁春华,谢英娜.钴掺杂二氧化钛光催化剂制备及光催化活性[J].无机盐工业,2011(11):31-33. |
| [24] | 张莉,谭林燕,冯竹,朱强,赵国良,全学军.多级孔结构TiO2微球光催化剂的制备及其性能研究[J].重庆理工大学学报（自然科学版）,2011(03):51-57. |
| [25] | 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. |
| [26] | Wang Zhenhua .Preparation,characterization and photo-catalysis of doped modification of nanometer titanium di-oxide[D].Ji'nan:Shandong University,2007. |
| [27] | 高伟,吴凤清,罗臻,富菊霞,王德军,徐宝琨.TiO2晶型与光催化活性关系的研究[J].高等学校化学学报,2001(04):660-662. |
| [28] | 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. |
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