College of Environment and Planning, Henan University, Kaifeng, 475001, China.
Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Henan University, Kaifeng, 475001, China.
Environ Sci Pollut Res Int. 2020 Jun;27(18):22631-22638. doi: 10.1007/s11356-020-08732-1. Epub 2020 Apr 21.
A simple colloidal crystal template method was used to prepare Sn/TiO/graphite carbon microsphere composites (xSn/TiO/GCM, x = 2.0, 1.0, 0.2, 0.5) with porous layers. Then, the composites were represented using X-ray diffraction, energy dispersive spectrometry, scanning electron microscopy, transmission electron microscopy, and nitrogen physical adsorption/desorption. Meanwhile, the photocatalytic activities in CO reduction were studied under simulation of visible light exposure. It was confirmed that the Sn/TiO/GCM composites had layered porosity, graphitized carbon matrix, and high metal compound content, and their morphology was greatly affected by the acetone amount. The outputs of CO and CH coming into the photocatalytic CO reduction reaction of Sn/TiO/GCM were 619.46 and 14.46 μmol g, respectively. Among the two products, the highest production rate observed in 0.5Sn/TiO/GCM. Because of these factors, the layered porous Sn/TiO/GCM composites have good photocatalytic performance under simulated visible light irradiation and have unique composition and structure characteristics, which give broad application prospects in electrode materials, catalysts, and adsorbents. Graphical abstract.
采用简单的胶体晶体模板法制备了具有多孔层的 Sn/TiO/graphite 碳微球复合材料(xSn/TiO/GCM，x=2.0、1.0、0.2、0.5)。然后，使用 X 射线衍射、能量色散光谱、扫描电子显微镜、透射电子显微镜和氮物理吸附/解吸对复合材料进行了表征。同时，在模拟可见光照射下研究了 CO 还原中的光催化活性。证实 Sn/TiO/GCM 复合材料具有层状多孔性、石墨化碳基质和高金属化合物含量，其形态受丙酮用量的影响很大。Sn/TiO/GCM 的光催化 CO 还原反应中 CO 和 CH 的产物分别为 619.46 和 14.46 μmol·g-1。在这两种产物中，0.5Sn/TiO/GCM 观察到的最高生成速率。由于这些因素，层状多孔 Sn/TiO/GCM 复合材料在模拟可见光照射下具有良好的光催化性能，具有独特的组成和结构特征，在电极材料、催化剂和吸附剂方面具有广阔的应用前景。
