Ultrasensitive detection of UO2 2+ based on dopamine-functionalized MoOx quantum dots.
Luminescence
; 37(1): 127-133, 2022 Jan.
Article
en En
| MEDLINE
| ID: mdl-34730276
ABSTRACT
Uranium is an important nuclear fuel and the risk of human exposure to uranium increases as increasing amounts of uranium-containing waste enter the environment due to the rapid growth of nuclear power. Therefore, rapid, sensitive, and portable uranium detection is a promising approach to effectively control and monitor uranium contamination. To achieve this goal, abundant oxygen- and nitrogen-containing groups were introduced to molybdenum oxide quantum dot (MoOx QDs) surfaces with dopamine (DA) modification. Due to the excellent coordination ability of oxygen- and nitrogen-containing groups with uranium, the obtained DA-functionalized MoOx QDs (DA-MoOx QDs) showed a strong binding affinity for uranium and sensitivity was increased nearly 1000-fold compared with MoOx QDs alone. The limit of detection was 3.85 nM, which is higher than most of the reported nanomaterials. Moreover, the DA-MoOx QD-based method showed high selectivity and uranium could be clearly detected under masking with ethylenediaminetetraacetic acid even when the concentration of other metal ions was 100-fold higher than that of uranium, showing a very promising method for uranium contamination control and monitoring.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Uranio
/
Puntos Cuánticos
Tipo de estudio:
Diagnostic_studies
Límite:
Humans
Idioma:
En
Revista:
Luminescence
Asunto de la revista:
BIOFISICA
/
BIOQUIMICA
Año:
2022
Tipo del documento:
Article
País de afiliación:
China