Sugita Tsuyoshi, Mori Masanobu, Mase Akinori, Noguchi Shin-nosuke, Tokutome Toru, Fujii Kengo, Hara Chisato, Katayama Kenji, Iwamoto Shinji, Itabashi Hideyuki
Graduate School of Science and Technology, Gunma University.
Anal Sci. 2015;31(1):15-21. doi: 10.2116/analsci.31.15.
In this study, a photocatalytic plate bound to highly dispersible silica-doped titanium dioxide (SiT) on a trimethoxysilyl-propyldiethylenetriamine (dien)-coated glass plate (dien-plate) was newly synthesized, and was evaluated by a flow analytical (FA) system, which consists of a photocatalytic reactor and a spectrophotometer, to continuously monitor the absorbance of tested chemicals. The method was not required to collect any sample solution at a constant period. The SiT-dien-plate facilitated the photodecomposition of methylene blue (MB) and indigo carmine (InC) in aqueous solutions. Notably, MB was quantitatively photo-decomposed following 18 h of UV-light irradiation, related to the electrostatic adsorption of surface-bound particles. A water-treatment ability of visible-light-responsive vanadium-modified nitrogen/silica co-doped titanium dioxide fixed on the dien-plate was also evaluated by the FA system. It clarified to decompose MB and InC under visible-light irradiation. Finally, the decomposition of a humic substance dissolved from Middle West China peaty soils by the SiT-dien-plate under UV-irradiation was assessed as applying the FA system with a photocatalytic plate.
在本研究中，新合成了一种光催化板，其通过三甲基硅烷基丙基二乙三胺（dien）涂覆的玻璃板（dien板）与高度分散的二氧化硅掺杂二氧化钛（SiT）结合，并通过流动分析（FA）系统进行评估，该系统由光催化反应器和分光光度计组成，用于连续监测被测化学品的吸光度。该方法无需在固定时间收集任何样品溶液。SiT-dien板促进了水溶液中亚甲基蓝（MB）和靛蓝胭脂红（InC）的光分解。值得注意的是，由于表面结合颗粒的静电吸附作用，在紫外光照射18小时后，MB被定量光分解。通过FA系统还评估了固定在dien板上的可见光响应钒改性氮/硅共掺杂二氧化钛的水处理能力。结果表明，在可见光照射下，该材料能分解MB和InC。最后，应用带有光催化板的FA系统，评估了SiT-dien板在紫外光照射下对中国中西部泥炭土溶解的腐殖质的分解情况。
