Reversible chemochromic MoO3 nanoribbons through zerovalent metal intercalation.
Reversible chemochromic MoO3 nanoribbons through zerovalent metal intercalation.
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DOI：
10.1021/acsnano.5b00336
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发表时间：
2015-03
期刊：
影响因子：
17.1
通讯作者：
Mengjing Wang;K. Koski
中科院分区：
文献类型：
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作者：
Mengjing Wang;K. Koski
三氧化钼（α-MoO3）是一种二维层状氧化物，由于其能够通过电化学或氢嵌入在透明和浅蓝色之间可逆地改变颜色，因此可用于电致变色和光致变色器件。尽管MoO3具有巨大的应用潜力，但其性能在很大程度上受到这些插层技术的破坏性、不显著的着色和缓慢的颜色响应的限制。我们展示了一种可逆的化学显色方法，使用零价金属嵌入到α-MoO3纳米带（Sn，102 at. %; Co，0.44at. %），以将MoO3从透明的白色化学改变为深蓝色靛蓝，从而导致增强的着色和化学可调的光学性质。我们提出了两种策略，可逆地调整MoO3纳米带的颜色响应。变色可以逆转（i）通过与过氧化氢或碘完全氧化脱嵌或（ii）通过温度驱动的无序有序相变的嵌入零价金属。
Molybdenum trioxide (α-MoO3) is a 2D layered oxide with use in electrochromic and photochromic devices owing to its ability to reversibly change color between transparent and light blue with electrochemical or hydrogen intercalation. Despite its significant application potential, MoO3 performance is largely limited by the destructiveness of these intercalation techniques, insignificant coloration, and slow color response. We demonstrate a reversible chemochromic method, using intercalation of zerovalent metals into α-MoO3 nanoribbons (Sn, ∼2 at. %; Co, ∼4 at. %), to chemically alter MoO3 from transparent white to a deep blue indigo, resulting in enhanced coloration and chemically tunable optical properties. We present two strategies to reversibly tune the color response of MoO3 nanoribbons. Chromism can be reversed (i) by complete oxidative deintercalation with hydrogen peroxide or iodine or (ii) through a temperature-driven disorder-order phase transition of the intercalated zerovalent metal.