Effect of particle size and phase composition of titanium dioxide nanoparticles on the photocatalytic properties
Effect of particle size and phase composition of titanium dioxide nanoparticles on the photocatalytic properties
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DOI：
10.1023/a:1017948330363
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发表时间：
2001-06-01
影响因子：
2.5
通讯作者：
Kim, SJ
中科院分区：
文献类型：
--
作者：
Jang, HD;Kim, SK;Kim, SJ
在扩散火焰反应器中，以四氯化钛（TiCl 4）为原料，通过氧化反应制备了纳米二氧化钛（TiO 2）。纳米粒子平均粒径为15-30 nm，纳米粒子的质量分数为40%~ 80%。考察了纳米TiO 2颗粒的粒径和物相组成对亚甲基蓝、细菌和氨气降解等光催化性能的影响。在黑光灯照射下，纳米TiO 2对亚甲基蓝的降解程度与纳米TiO 2的质量分数成正比，与粒径成反比。在荧光灯的照射下，通过TiO 2纳米颗粒对细菌和氨气的分解显示出与亚甲基蓝的情况相同的趋势。
Titanium dioxide (TiO2) nanoparticles were prepared by the oxidation of titanium tetrachloride (TiCl4) in a diffusion flame reactor. The average diameter of particles was 15-30 nm and mass fraction of anatase ranged from 40% to 80%. Effects of particle size and phase composition of those TiO2 nanoparticles on photocatalytic properties such as decomposition of methylene blue, bacteria and ammonia gas were investigated. The degree of decomposition of methylene blue by the TiO2 nanoparticles under the illumination of the black light was directly proportional to the anatase mass fraction, but inversely to the particle size. The decomposition of bacteria and ammonia gas by the TiO2 nanoparticles under the illumination of the fluorescent light showed the same trend as in the case of the methylene blue.