There has recently been a renewed interest in the photochromic properties and uses of TiO₂ as a potential candidate for smart windows. However, the surrounding medium of TiO₂ nanoparticles (NPs) is of equal importance, as it facilitates hole scavenging and, in turn, photochromism. Here, we investigated the impact of scavenging power on the photochromic properties of TiO₂. TiO₂ NP colloids in these solvents exhibit a photochromic response in a broad wavelength range from the visible to near-infrared region. We have shown that solvents such as ethanol have the best hole scavenging properties among the alcohols tested. The response can be further modified by the addition of a supplementary hole scavenger, such as hydroxylamine. The photochromism of TiO₂ is fully reversible and could be used for applications in smart windows.

中文翻译：

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在不同的空穴清除溶剂中TiO2光致变色反应的动力学。

最近，人们对光致变色特性以及将TiO ₂用作智能窗户的潜在候选者有了新的兴趣。但是，TiO ₂纳米颗粒（NPs）的周围介质具有同等重要的作用，因为它有助于清除空穴，进而促进光致变色。在这里，我们研究了清除能力对TiO ₂的光致变色性能的影响。二氧化钛₂这些溶剂中的NP胶体在从可见光到近红外的宽波长范围内均表现出光致变色响应。我们已经表明，溶剂（例如乙醇）在测试的醇中具有最佳的空穴清除性能。通过添加补充的空穴清除剂，例如羟胺，可以进一步改变反应。TiO ₂的光致变色是完全可逆的，可用于智能窗户中。