Proton exchange growth to mesoporous WO3·0.33H2O structure with highly photochromic sensitivity
Proton exchange growth to mesoporous WO3·0.33H2O structure with highly photochromic sensitivity
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DOI：
10.1016/j.matlet.2012.10.018
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发表时间：
2013-01
影响因子：
3
通讯作者：
Baixiong Liu;Jinshu Wang;Junshu Wu;Hongyi Li;Hong Wang;Zhifei Li;Meiling Zhou;T. Zuo
中科院分区：
文献类型：
--
作者：
Baixiong Liu;Jinshu Wang;Junshu Wu;Hongyi Li;Hong Wang;Zhifei Li;Meiling Zhou;T. Zuo
提高WO_3·0.33H_2O的比表面积是提高其光致变色灵敏度的有效途径之一。通过调节Na2WO4·2H2O的浓度，通过质子交换的方法合成了具有层次化结构的WO3.0.33H2O介孔纳米棒。当Na2WO4·2H2O的浓度为2.0gL−1时，可以得到直径为10∼的介孔纳米棒，平均孔径约为4 nm。这种新型的WO_3·0.33H_2O多孔结构具有很高的光致变色灵敏度和抗疲劳性能。由于介孔结构具有较大的比表面积，因此表现出可见光驱动的光致变色响应。介孔的形成是由于WO_3·H_2O向WO_3·0.33H_2O转变过程中体积减小所致。
Enhancing surface area is one of the efficient ways to improve photochromic sensitivity of WO3·0.33H2O. Hierarchical WO3·0.33H2O mesoporous nanorod assemblies were synthesized via proton exchange by adjusting the concentration of Na2WO4·2H2O. When the concentration of Na2WO4·2H2O is 2.0gL−1, mesoporous nanorods with 10∼20nm in diameter and an average pores size of about 4nm were obtained. The novel WO3·0.33H2O porous structure possesses highly photochromic sensitivity and fatigue resistance properties. It exhibits visible-light-driven photochromic response due to large specific surface area originated from the mesoporous structure. The formation of mesopores is due to the volume decreasing in the transformation process from WO3·H2O to WO3·0.33H2O.