Morphology Control, High-Temperature Fluorescence Properties, and Their Application in Fingerprint Detection of GdPO4·H2O:12%Eu3+ Nanophosphors
Jinxiu Wua, b, c, *, Shengquan Wanga, b, c, Baolong Wua, b, c, Meng Zhanga, b, c, Zhaogang Liua, b, c, Yanhong Hua, b, c, Xiaowei Zhanga, b, c, Jianfei Lia, b, c, Feng Guoa, b, c, Qi Lua, b, c, and Qianqian Zhanga, b, c
aSchool of Metallurgical Future Technology, Inner Mongolia University of Science and Technology, Baotou, 014010 China
bSchool of Rare Earth Industry, Inner Mongolia University of Science and Technology, Baotou, 014010 China
cKey Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources (Inner Mongolia University of Science and Technology), Ministry of Education, Baotou, 014010 China
email: *m13674773965@163.com
Received 14 January, 2025
Abstract— To enhance the efficiency of latent fingerprint detection, the development of nanoscale, highly stable red phosphors is essential. In this study, a series of GdPO4·H2O:12%Eu3+ nanophosphors were synthesized via the hydrothermal method by adjusting the pH value. The synthesized products were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and fluorescence spectrophotometry. The results indicate that the pH value does not affect the crystal structure of the product but effectively regulates the morphology and size of the nanophosphors. The fluorescence intensity of the product gradually decreases with increasing pH. Additionally, the product exhibits excellent thermal stability. The red phosphor can clearly reveal the multilayered features of latent fingerprints and remains successfully identifiable even after 24 h of UV exposure. This study provides new insights into the development of efficient and stable rare-earth nanomaterials for fingerprint visualization.
Keywords:
GdPO4·H2O:12%Eu3+
,
pH,
morphology,
luminescent properties,
fingerprint field
DOI: 10.1134/S003602362560008X