ACS Appl Mater Interfaces. 2009 Jun;1(6):1163-5. doi: 10.1021/am9001502.
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.
一种基于亚甲基蓝 (MB) 的新型光催化剂指示剂墨水，可在几秒钟内评估 15nm 厚的光催化薄膜的存在和活性。该墨水非常稳定（保质期>6 个月），颜色变化（蓝色变为无色）明显。该墨水利用牺牲电子供体甘油来捕获光生空穴，留下光生电子与 MB 反应生成其还原形式（LMB）。MB 墨水的功效归因于其配方中存在酸，这显著抑制了 LMB 通常会被环境 O2 快速氧化的情况。
