采用模板导向法合成及表征氧化钆空心微球

Synthesis and Characterization of Gd₂O₃ Hollow Microspheres Using a Template-Directed Method.

作者信息

Jiang Xueliang, Yu Lu, Yao Chu, Zhang Fuqing, Zhang Jiao, Li Chenjian

机构信息

College of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430074, Hubei, China.

出版信息

Materials (Basel). 2016 Apr 28;9(5):323. doi: 10.3390/ma9050323.

DOI:10.3390/ma9050323

PMID:28773446

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5503032/

Abstract

Uniform rare-earth gadolinium oxide (Gd₂O₃) hollow microspheres, as formed through a urea-assisted homogenous precipitation process using carbon spheres as a template and a subsequent heat treatment, were characterized by using X-ray diffraction, Fourier transformed infared spectroscopy, thermogravimetry, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy and Brunauer-Emmett-Tellet surface area measurement. The results indicate that the final products can be indexed to a cubic Gd₂O₃ phase with high purity and have a uniform morphology at 500 nm in diameter and 20 nm in shell thickness. The as-synthesized Gd₂O₃ hollow microspheres exhibited a superior photooxidation activity to that of Gd₂O₃ powder and an effect similar to P25, significantly broadening the potential of Gd₂O₃ hollow microspheres for many practical applications.

摘要

通过以碳球为模板的尿素辅助均匀沉淀法以及随后的热处理形成的均匀稀土氧化钆（Gd₂O₃）空心微球，采用X射线衍射、傅里叶变换红外光谱、热重分析、X射线光电子能谱、扫描电子显微镜、透射电子显微镜和布鲁诺尔-埃米特-泰勒表面积测量等手段进行了表征。结果表明，最终产物可归属于高纯度的立方Gd₂O₃相，且具有均匀的形态，直径为500 nm，壳厚度为20 nm。所合成的Gd₂O₃空心微球表现出优于Gd₂O₃粉末的光氧化活性以及与P25类似的效果，显著拓宽了Gd₂O₃空心微球在许多实际应用中的潜力。