水热合成LaPO₄纳米棒的相变与光催化活性

Phase Transition and Photocatalytic Activity of Hydrothermally-Synthesized LaPO₄ Nanorods.

作者信息

Xiang Ji-Yun, Zhang Ke, Zhu Zhong-Qi, Zhu Jing

机构信息

Yunnan Key Laboratory for Micro/Nano Materials & Technology, School of Materials Science and Engineering, Yunnan University, Kunming 650091, China.

出版信息

J Nanosci Nanotechnol. 2019 Sep 1;19(9):5878-5884. doi: 10.1166/jnn.2019.16546.

DOI:10.1166/jnn.2019.16546

PMID:30961753

Abstract

Monoclinic and hexagonal LaPO₄ nanorods were prepared through hydrothermal method without the assistance of additives. The products were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED). Monoclinic and hexagonal LaPO₄ nanorods can be achieved by adjusting the hydrothermal temperature and the pH value. The photocatalytic activity of monoclinic and hexagonal LaPO₄ nanorods on rhodamine B (RB) and Congo red (CR) under UV irradiation was investigated, respectively. Interestingly, the monoclinic and hexagonal phase shows different photocatalytic performance for the photodegradation of the organic RB and CR dye.

摘要

通过水热法在无添加剂辅助的情况下制备了单斜晶系和六方晶系的磷酸镧纳米棒。通过粉末X射线衍射（XRD）、透射电子显微镜（TEM）、高分辨率透射电子显微镜（HRTEM）和选区电子衍射（SAED）对产物进行了表征。通过调节水热温度和pH值可以得到单斜晶系和六方晶系的磷酸镧纳米棒。分别研究了单斜晶系和六方晶系的磷酸镧纳米棒在紫外光照射下对罗丹明B（RB）和刚果红（CR）的光催化活性。有趣的是，单斜晶相和六方晶相在有机RB和CR染料的光降解方面表现出不同的光催化性能。