AUTHOR=Wang Yufei , Wang Yanran , Huang Chunxia , Chen Tianyou , Wu Jing 

TITLE=Ultra-Weak Chemiluminescence Enhanced by Cerium-Doped LaF3 Nanoparticles: A Potential Nitrite Analysis Method

JOURNAL=Frontiers in Chemistry

VOLUME=8

YEAR=2020

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.00639

DOI=10.3389/fchem.2020.00639

ISSN=2296-2646

ABSTRACT=<p>In this work, cerium-doped LaF<sub>3</sub> nanoparticles (LaF<sub>3</sub>:Ce NPs) were successfully synthesized and characterized. Its chemiluminescence (CL) property was studied, and it was amazingly found that it intensely enhanced the ultra-weak CL of the NaNO<sub>2</sub>-H<sub>2</sub>O<sub>2</sub> system. The CL mechanism was systematically investigated and suggested to be the recombination of electron-injected and hole-injected LaF<sub>3</sub>:Ce NPs. The new CL system was developed to be a facile, original, and direct method for nitrite analysis. Experimental conditions were optimized and then a satisfactory linear relationship between CL intensity and nitrite concentration was obtained. This work introduced a new pathway for the research and application of traditional fluoride NPs doped with RE<sup>3+</sup>.</p>