了解具有增强光催化固氮活性的BiWO的层级行为。
Understanding the hierarchical behavior of BiWO with enhanced photocatalytic nitrogen fixation activity.
作者信息
Bao Liang, Yuan Yong-Jun, Zhang Huaiwei, Zhang Xuefeng, Xu Gang
机构信息
College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hang Zhou 310018, China.
State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
出版信息
Dalton Trans. 2021 Jun 1;50(21):7427-7432. doi: 10.1039/d1dt00762a.
Hierarchical Bi2WO6 nanostructures self-assembled with planar arranged nanosheets and dispersed Bi2WO6 nanosheets were synthesized with different dosages of EG via a simple hydrothermal route. The Bi2WO6 photocatalysts were analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). A control experiment was conducted to test the effect of EG dosage on the growth mechanism and behavior of the highly (010) exposed hierarchical lamellar nanostructures and dispersed nanosheets. The photocatalytic nitrogen fixation rate of the hierarchical Bi2WO6 nanostructures was estimated to be 948 μmol g-1 h-1 across the full spectrum, which was 23% higher than that of the dispersed nanosheets (770 μmol g-1 h-1) due to chemisorption on the hierarchical structures and enhanced surface oxygen vacancies (OVs).
通过简单的水热法，以不同剂量的乙二醇（EG）合成了由平面排列的纳米片自组装而成的分级Bi2WO6纳米结构以及分散的Bi2WO6纳米片。采用X射线衍射（XRD）、透射电子显微镜（TEM）、紫外-可见漫反射光谱（DRS）和X射线光电子能谱（XPS）对Bi2WO6光催化剂进行了分析。进行了对照实验，以测试EG剂量对高度暴露（010）的分级层状纳米结构和分散纳米片的生长机制及行为的影响。分级Bi2WO6纳米结构的光催化固氮率在全光谱范围内估计为948 μmol g-1 h-1，由于在分级结构上的化学吸附和表面氧空位（OVs）的增加，比分散纳米片（770 μmol g-1 h-1）的光催化固氮率高23%。
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