A facile preparation of ZnGa2O4 photonic crystals with enhanced light absorption and photocatalytic activity
A facile preparation of ZnGa2O4 photonic crystals with enhanced light absorption and photocatalytic activity
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一种易于制备具有增强光吸收和光催化活性的 ZnGa2O4 光子晶体
DOI：
10.1039/c4ta03333g
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发表时间：
2014-09
影响因子：
11.9
通讯作者：
Li, Danzhen
中科院分区：
文献类型：
--
作者：
Li, Xiaofang;Zhang, Xiaoyun;Zheng, Xiuzhen;Shao, Yu;He, Miao;Wang, Peng;Fu, Xianzhi;Li, Danzhen
多金属氧化物光子晶体具有高度有序的结构和独特的光子效应，在光催化剂的设计中具有广阔的应用前景。本研究发展了一种在较低温度（500 °C）下制备具有高度有序骨架结构的纯ZnGa2O4光子晶体的简便方法。由于ZnGa2O4光子晶体在高度有序的通道中促进了物质的传输，因此与多孔ZnGa2O4和ZnGa2O4纳米晶体相比，ZnGa2O4光子晶体对甲基橙橙子的降解表现出更好的光催化活性。通过改变孔径，在光子带隙的蓝边观察到慢光子效应，从而增强了孔径为180 nm的ZnGa2O4光子晶体的电子带吸收，进一步提高了相应的光催化活性。并对ZnGa2O4光子晶体的退化机理进行了讨论。ZnGa2O4光子晶体的制备为开发具有增强光吸收和光催化活性的三元金属氧化物光子晶体提供了实验指导。
Photonic crystals of multiple metal oxides with highly ordered structures and unique photonic effects have presented a prospective application in designing of photocatalysts. In this study, a facile method was developed to prepare pure ZnGa2O4 photonic crystals with a highly ordered skeleton structure at a relatively low temperature (500 °C). Due to facilitated mass transport in a highly ordered channel, the as-prepared ZnGa2O4 photonic crystals exhibits better photocatalytic activity towards methyl orange degradation compared to those of porous ZnGa2O4 and ZnGa2O4 nanocrystals. By changing the pore diameters in the structure, a slow photon effect on the blue edge of photonic band gap could be observed, which consequently enhanced the electronic band absorption over ZnGa2O4 photonic crystals with a pore diameter of 180 nm, and further improved their corresponding photocatalytic activity. Furthermore, the degradation mechanism over ZnGa2O4 photonic crystals was discussed. The preparation of ZnGa2O4 photonic crystals in this study provides experimental guidance for developing ternary metal oxide photonic crystals with enhanced light absorption and photocatalytic activities.
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