Decoupling the Effects of High Crystallinity and Surface Area on the Photocatalytic Overall Water Splitting over β-Ga2 O3 Nanoparticles by Chemical Vapor Synthesis.
Decoupling the Effects of High Crystallinity and Surface Area on the Photocatalytic Overall Water Splitting over β-Ga2 O3 Nanoparticles by Chemical Vapor Synthesis.
复制标题
通过化学气相合成解耦高结晶度和表面积对 β-Ga2 O3 纳米颗粒光催化整体水分解的影响
DOI：
10.1002/cssc.201701309
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发表时间：
2017
期刊：
影响因子：
8.4
通讯作者：
M. Muhler
中科院分区：
文献类型：
--
作者：
S. Lukic;J. Menze;P. Weide;G.W. Busser;M. Winterer;M. Muhler
化学气相合成（CVS）是一种独特的方法，可以制备具有大比表面积和高结晶度的明确定义的光催化剂材料。通过Rh/CrOx助催化剂体系的还原光沉积，优化了所获得的β-Ga 2 O3纳米颗粒的结构。在1000 °C ~ 1500 °C温度范围内，通过合成β-Ga 2 O3样品，研究了结晶度和比表面积对光催化甲醇水溶液重整和总水裂解（OWS）的影响。随着温度的升高，比表面积和微观应变减小，而结晶度和晶粒尺寸增加。而具有最高比表面积的光催化剂表现出最高的水溶液甲醇重整活性，最高的OWS活性是高结晶度和比表面积之间的最佳比例的样品。因此，可以表明，容易的甲醇水溶液重整和要求苛刻的OWS对高光催化活性具有不同的要求。
Chemical vapor synthesis (CVS) is a unique method to prepare well‐defined photocatalyst materials with both large specific surface area and a high degree of crystallinity. The obtained β‐Ga2O3nanoparticles were optimized for photocatalysis by reductive photodeposition of the Rh/CrOxco‐catalyst system. The influence of the degree of crystallinity and the specific surface area on photocatalytic aqueous methanol reforming and overall water splitting (OWS) was investigated by synthesizing β‐Ga2O3samples in the temperature range from 1000 °C to 1500 °C. With increasing temperature, the specific surface area and the microstrain were found to decrease, whereas the degree of crystallinity and the crystallite size increased. Whereas the photocatalyst with the highest specific surface area showed the highest aqueous methanol reforming activity, the highest OWS activity was that for the sample with an optimum ratio between high degree of crystallinity and specific surface area. Thus, it was possible to show that the facile aqueous methanol reforming and the demanding OWS have different requirements for high photocatalytic activity.
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影响因子：
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