PHOTOCATALYTICALLY INDUCED DYE DECOLOURISATION IN AN UNSUPPORTED THIN FILM REACTOR
PHOTOCATALYTICALLY INDUCED DYE DECOLOURISATION IN AN UNSUPPORTED THIN FILM REACTOR
复制标题
无支撑薄膜反应器中的光催化诱导染料脱色
DOI：
10.1080/00986449708936584
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发表时间：
1997
影响因子：
2.5
通讯作者：
D. Drott
中科院分区：
文献类型：
--
作者：
G. Shama;D. Drott
染料靛蓝胭脂红的水溶液在紫外线（UV）照射后在半导体光催化剂二氧化钛TiO 2的存在下以薄液膜的形式脱色。这些膜是无支撑的和完全封闭的，通常被称为液体“钟”，并使用特殊设计的喷嘴产生。脱色速率随着Ti 〇 2的浓度从0.74 g/l增加到11.8 g/l而增加。在1.47g/l的固定Ti 〇 2浓度下，以1.07至8.53g/l的浓度范围添加过氧化氢H2 〇 2也导致脱色速率增加。假定靛蓝胭脂红的消失速率遵循一级动力学，而另外两种物质TiO 2和H2 O2的影响由幂律模型解释。从实验数据的分析获得的该模型的指数对于Ti 〇 2和H2 〇 2分别为0.8和0.2。
Aqueous solutions of the dye indigo carmine were decolourised following ultraviolet (UV) irradiation in the form of thin liquid films in the presence of the semi-conductoi photocatalyst, titanium dioxide, Ti02. These films, which were unsupported and totally enclosed, are commonly referred to as liquid “bells” and were generated using a nozzle of special design. Decolourisation rates were increased as the concentration of Ti02 was increased from 0.74 to 11.8 g/l. Addition of hydrogen peroxide, H202, in concentrations ranging from 1.07 to 8.53 g/l at a fixed Ti02 concentration of 1.47 g/l also resulted in increased rates of decolourisation. The rate of disappearance of the indigo carmine was assumed to follow first order kinetics whereas the influence of the two other species, Ti02 and H202, was accounted for by a power law model. The exponents for this model, obtained from an analysis of the experimental data, were 0.8 and 0.2 for, respectively Ti02 and H202.