以金红石型TiO2(TIO-R)、葡萄糖及FeC2O4为前驱物,在氩气气氛中煅烧制备Fe-C-TiO2催化剂,以内分泌干扰物阿特拉津作模型污染物,研究Fe-C-TiO2可见光催化H2O2降解阿特拉津的光催化反应特性.结果表明,煅烧温度影响Fe-C-TiO2的组成(碳包覆量和负载Fe的存在形式)及催化活性;673 K煅烧温度下Fe-C-TiO2的碳包覆量约为2.5%,而负载Fe主要以高活性的α-Fe2O3形式存在;Fe-C-TiO2能在可见光下催化H2O2降解阿特拉津,反应45 min后,阿特拉津的降解率达99%,远高于TIO-R的催化活性,负载Fe与TIO-R之间存在明显的协同效应;反应体系的荧光光谱分析显示,阿特拉津的降解涉及较单纯羟基自由基(?OH)更为复杂的反应机理.
Fe-C-TiO2 photocatalysts were prepared by calcination of rutile TiO2, glucose and FeC2O4 in argon atmosphere, and the photocatalytic properties of Fe-C-TiO2 with H2O2 photocatalysis were also studied by using atrazine as model pollutants. The results indicate that the calcination temperature has great effects on the constituent(carbon coating and existing form of Fe) and photoactivities of Fe-C-TiO2, the carbon coating of Fe-C-TiO2 calcined at 673 K is approximately 2.5%, and iron element is in the form of α-Fe2O3 which has high catalytic activity. Atrazine can be degraded with H2O2 photocatalyzed by Fe-C-TiO2 under visible irradiation, the degradation ratio reaches 99% after reaction for 45 min, and the degradation efficiency is evidently higher than that of the TIO-R. The fluorescence spectrum analysis indicates that the reaction process is not limited to the generation of hydroxyl free radical (?OH) in the system.
参考文献
| [1] | 籍宏伟,马万红,黄应平,赵进才,王正平.可见光诱导TiO2光催化的研究进展[J].科学通报,2003(21):2199-2204. |
| [2] | CHOI W;TERMIN A;HOFFMANN M R .The role of metal ion dopants in quantum-sized TiO2:Correlation between photoreactivity and charge carrier recombination dynamics[J].Journal of Physical Chemistry,1994,98(05):13669-13679. |
| [3] | 唐建军,王岳俊,谢炜平,邹原,周康根.N/TiO2光催化剂的制备及掺杂过程分析[J].过程工程学报,2008(01):172-176. |
| [4] | 李青松,高乃云,马晓雁,汪力,赵建夫,乐林生.TiO2光催化降解水中内分泌干扰物17β-雌二醇[J].环境科学,2007(01):120-125. |
| [5] | Xiangzhong Li;Chuncheng Chen;Jincai Zhao .Mechanism of Photodecomposition of H_2O_2 on TiO_2 Surfaces under Visible Light Irradiation[J].Langmuir: The ACS Journal of Surfaces and Colloids,2001(13):4118-4122. |
| [6] | OHNO T;MASAKI Y;HIRAYAMA S .TiO2 photocatalyzed epoxidation of 1-decene by H2O2 under visible light[J].Journal of Catalysis,2001,204:163-168. |
| [7] | 唐建军,范小江,邹原,邓爱华,张伟,周康根.H2O2在TiO2可见光催化反应中的作用机理[J].中国有色金属学报,2009(02):292-297. |
| [8] | 唐建军,范小江,邹原,张伟,周康根.自由基抑制剂对不同晶型TiO2光催化反应的影响[J].北京化工大学学报(自然科学版),2009(03):36-40. |
| [9] | Tsutomu Hirakawa;Kenta Yawata;Yoshio Nosaka .Photocatalytic reactivity for O2- and OH radical formation in anatase and rutile TiO2 suspension as the effect of H2O2 addition[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2007(1):105-111. |
| [10] | 唐建军,刘淑君,邹原,谢炜平,刘丰良.r-TiO2可见光催化H2O2降解阿特拉津[J].矿冶工程,2010(03):106-109. |
| [11] | 李忠,赵祯霞,徐科峰,奚红霞.超声辐射制备Fe3+/γ-Al2O3催化剂催化降解含酚废水[J].华南理工大学学报（自然科学版）,2006(03):29-33. |
| [12] | LIU T;YOU H;CHEN Q W .Heterogeneous photo-Fenton degradation of polyacrylamide in aqueous solutions over Fe(Ⅲ)-SiO2 catalyst[J].J Hazard Maters,2009,162:860-865. |
| [13] | 陈立静,王婷,陈锋,张金龙.以酚醛树脂为碳源的碳改性TiO2可见光光催化剂[J].催化学报,2011(04):699-703. |
| [14] | DU Y X;ZHOU M H;LEI L C .Role of the intermediates in the degradation of phenolic compounds by Fenton-like process[J].J Hazard Maters,2006,136:859-864. |
| [15] | A new insight into Fenton and Fenton-like processes for water treatment[J].Journal of hazardous materials,2010(1/3):813. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%