A novel, fast-responding, indicator ink for thin film photocatalytic surfaces.
A novel, fast-responding, indicator ink for thin film photocatalytic surfaces.
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一种用于薄膜光催化表面的新型、快速响应指示剂墨水。
DOI：
10.1021/am9001502
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发表时间：
2009
影响因子：
9.5
通讯作者：
Mills A
中科院分区：
文献类型：
--
作者：
Mills A
描述了一种基于亚甲基蓝（MB）的新型光催化指示剂油墨，它可以在几秒钟内评估薄（15纳米）光催化膜的存在和活性。油墨非常稳定（保质期6个月左右），颜色变化（蓝色到无色）引人注目。这种墨水利用牺牲电子供体甘油来捕获光生成的空穴，让光生成的电子与MB发生反应，生成其还原的无色形态（LMB）。MB油墨的功效是由于其配方中存在酸，这大大减少了通常情况下LMB被环境O2快速再氧化的情况。
A new photocatalyst indicator ink based on methylene blue (MB) is described that allows the presence and activity of a thin (15 nm) photocatalytic film to be assessed in seconds. The ink is very stable (shelf life > 6 months) and the color change (blue to colorless) striking. The ink utilizes a sacrificial electron donor, glycerol, to trap the photogenerated holes, leaving the photogenerated electrons to react with MB to produce its reduced, leuco, form (LMB). The efficacy of the MB ink is due to the presence of acid in its formulation, which curtails significantly the otherwise usual, rapid reoxidation of LMB by ambient O2.