Li Yanping, Bian Xue, Dong Hui, Chang Hongtao, Wu Wenyuan
Key Laboratory of Ecological Metallurgy of Multi-Metal Intergrown Ores of Ministry of Education, Shenyang 110819, China.
School of Metallurgy, Northeastern University, Shenyang 110819, China.
Molecules. 2024 Dec 31;30(1):127. doi: 10.3390/molecules30010127.
Increasing the concentration of oxygen vacancies in ceria-based materials to solve the bottleneck of their applications in various fields has always been a research hotspot. In this paper, ceria-based cerium-oxygen-sulfur (Ce-O-S) composites that were composed of CeO, CeOS, and Ce(SO) were synthesized by a precipitation method. The compositional, structural, morphological, and light response characteristics of prepared Ce-O-S composites were investigated by various characterization techniques. The molar ratio of oxygen vacancies to lattice oxygen can reach a maximum of 1.83 with Ce-O-S composites. The band gap values of the Ce-O-S composites were less than 3.00 eV, and the minimum value was 2.89 eV (at pH 12), which successfully extended the light response range from the ultraviolet light region to the short-wave blue light region. The remarkable light response performance of Ce-O-S composites can be mainly attributed to the high proportion of oxygen vacancy. Moreover, the higher proportion of oxygen vacancies can be attributed to the doping of Ce (+3) and S (-2) in the lattice of CeO, and the synergistic effect of CeO, CeOS, and Ce(SO). Moreover, the ceria-based Ce-O-S composites with rich oxygen vacancy in this research can be applied in light blocking, photocatalysis, and other related fields.
提高铈基材料中氧空位的浓度以解决其在各个领域应用的瓶颈一直是研究热点。本文采用沉淀法合成了由CeO、CeOS和Ce(SO)组成的铈基铈 - 氧 - 硫（Ce - O - S）复合材料。通过各种表征技术研究了制备的Ce - O - S复合材料的组成、结构、形貌和光响应特性。Ce - O - S复合材料的氧空位与晶格氧的摩尔比最高可达1.83。Ce - O - S复合材料的带隙值小于3.00 eV，最小值为2.89 eV（在pH = 12时），成功地将光响应范围从紫外光区域扩展到短波蓝光区域。Ce - O - S复合材料显著的光响应性能主要归因于高比例的氧空位。此外，较高比例的氧空位可归因于Ce(+3)和S(-2)在CeO晶格中的掺杂以及CeO、CeOS和Ce(SO)的协同效应。而且，本研究中具有丰富氧空位的铈基Ce - O - S复合材料可应用于光阻挡、光催化等相关领域。
