分别以Ti(SO4)2和TiCl4为原料,通过水热pH值的控制,批量制备了片状的锐钛矿(AT)、棒状的金红石(RT)和菱形的板钛矿型(BT)TiO2.其中,AT具有最小的晶粒尺寸(约10 nm),其次为RT(30-50 nm),而BT具有最大的晶粒尺寸(50-70 nm).固体漫反射显示出AT、BT和RT对光响应的阀值分别为375 nm、385 nm和415 nm.其中,AT在紫外区显示出最强的光吸收能力.以阴离子活性染料X3B为目标分子的光催化降解实验结果显示,3种催化剂的光活性次序为AT>RT>BT,这与它们对X3B的吸附能力一致.文章对这产生TiO2光活性差异的原因进行了讨论.
参考文献
| [1] | Michael R. Hoffmann;Scot T. Martin;Wonyong Choi;Detlef W. Bahnemann .Environmental Applications of Semiconductor Photocatalysis[J].Chemical Reviews,1995(1):69-96. |
| [2] | Lv K L;Xu Y M .Effects of Polyoxometalate and fluoride on adsorption and photoeatalytic degradation of organic dye X3B on TiO2:the difference in the production of reactive species[J].Journal of Physical Chemistry B,2006,110:6204-6212. |
| [3] | Xu YM.;Langford CH. .UV- or visible-light-induced degradation of X3B on TiO2 nanoparticles: The influence of adsorption[J].Langmuir: The ACS Journal of Surfaces and Colloids,2001(3):897-902. |
| [4] | Addamo M;Bellardita M;Di Paola A;Palmisano L .Preparation and photoactivity of nanostructured anatase, rutile and brookite TiO2 thin films[J].Chemical communications,2006(47):4943-4945. |
| [5] | Hurrum D C;Agrios A G;Gray K A .Explaining the enhanced photocatalytic activity of degussa P25 mixed-phase TiO2 using EPR[J].Journal of Physical Chemistry B,2003,107:4545-4549. |
| [6] | Tatsuo Sbibata;Hiroshi Irie;Masahiro Ohmori;Akira Nakajima;Toshiya Watanabe;Kazuhito Hashimoto .Comparison of photochemical properties of brookite and anatase TiO_2 films[J].Physical chemistry chemical physics: PCCP,2004(6):1359-1362. |
| [7] | Toshiaki Ozawa;Mitsunobu Iwasaki;Hiroaki Tada;Tomoki Akita;Koji Tanaka;Seishiro Ito .Low-temperature synthesis of anatase-brookite composite nanocrystals:the junction effect on photocatalytic activity[J].Journal of Colloid and Interface Science,2005(2):510-513. |
| [8] | Yawen Wang;Lizhi Zhang;Kejian Deng;Xinyi Chen;Zhigang Zou .Low Temperature Synthesis and Photocatalytic Activity of Rutile TiO_2 Nanorod Superstructures[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2007(6):2709-2714. |
| [9] | Ji-Guang Li;Chengchun Tang;Di Li .Monodispersed Spherical Particles of Brookite-Type TiO_2: Synthesis, Characterization, and Photocatalytic Property[J].Journal of the American Ceramic Society,2004(7):1358-1361. |
| [10] | Kominami H.;Kera Y.;Kohno M. .Synthesis of brookite-type titanium oxide nano-crystals in organic media[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2000(5):1151-1156. |
| [11] | Elser M J;BergerT;BrandhuherD et al.Particles coming tngether,electron centers in adjoined TiO2 nanocrystals[J].Journal of Physical Chemistry B,2006,110:7605-7608. |
| [12] | Takashi Tachikawa;Yoshio Takai;Sachiko Tojo;Mamoru Fujitsuka;Tetsuro Majima .Probing the Surface Adsorption and Photocatalytic Degradation of Catechols on TiO_2 by Solid-State NMR Spectroscopy[J].Langmuir: The ACS Journal of Surfaces and Colloids,2006(3):893-896. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%