Photocatalytic Degradation of Rhodamine B on Anatase, Rutile, and Brookite TiO2
Photocatalytic Degradation of Rhodamine B on Anatase, Rutile, and Brookite TiO2
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DOI：
10.1016/s1872-2067(10)60222-7
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发表时间：
2011
影响因子：
16.5
通讯作者：
Jing Zhang;Song Yan;L. Fu;Fei Wang;M. Yuan;G. Luo;Qian Xu;Xiang Wang;Can Li
中科院分区：
文献类型：
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作者：
Jing Zhang;Song Yan;L. Fu;Fei Wang;M. Yuan;G. Luo;Qian Xu;Xiang Wang;Can Li
详细考察并比较了采用低温制备的锐钛矿、金红石和板钛矿氧化钛降解罗丹明 B 的光催化活性.在低温条件下制备了TiO 2粉体。与传统的高温煅烧法相比，低温煅烧法制备的金红石型TiO 2具有更小的粒径、更高的比表面积和更多的表面羟基，具有更高的光催化活性。在相同的粒径和比表面积条件下，金红石型TiO 2的光催化反应速率快于锐钛矿型TiO 2。当以转化的RhB摩尔数/小时表示时，纯板钛矿相显示出比锐钛矿相和金红石相更低的光催化活性。然而，其以摩尔转化的RhB/小时/表面积表示的面光催化活性远高于锐钛矿和金红石型TiO 2。
This study compared the photocatalytic activities for the degradation of Rhodamine B (RhB) in aqueous solutions of anatase, rutile, and brookite TiO2. The TiO2powders were prepared at low temperature. As compared with rutile obtained by a conventional high temperature calcination, the rutile TiO2prepared by the low temperature route had a smaller particle size, higher surface area, and more surface hydroxyl groups, and it gave a high photocatalytic activity. Rutile gave a faster photocatalysis reaction rate than anatase TiO2for the same particle size and surface area. A pure brookite phase showed a lower photocatalytic activity when this was expressed in moles converted RhB per hour than the anatase and rutile phases. However, its areal photocatalytic activity expressed in moles converted RhB per hour per surface area was much higher than that of anatase and rutile TiO2.