期刊
RSC ADVANCES
卷 6, 期 101, 页码 98554-98562出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra20380a
关键词
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资金
- National Natural Science Foundations of China [51203053, 51372091]
- Foundation for High-level Talents in Higher Education of Guangdong Province
- Project for Construction of High-level University in Guangdong Province
- Guangdong Natural Science Foundation [S2013030012842]
In this work, we present a rapid, selective and highly sensitive sensor for the detection of oxygen based on ratiometric fluorescent luminescent carbon dots (CDs) grafted CaSiO3: Eu3+. Highly monodispersed porous silica microspheres are obtained with particle sizes in the range between 120 and 180 nm, providing a key precursor to prepare the CaSiO3: Eu3+ phosphor. The fluorescence of CDs grafted CaSiO3: Eu3+ could be quenched by oxygen and the red emission of Eu3+ (613 nm and 703 nm) and the blue emission of the CDs (454 nm) were effectively reduced as the concentration of oxygen increased. The CaSiO3: Eu3+ phosphor shows little effect on oxygen, while CDs grafted CaSiO3: Eu3+ shows good oxygen sensing properties, the response time is determined to be about 4-7 s and the recovery time is 18-29 s. The obtained CDs grafted CaSiO3: Eu3+ sample appears to be a promising sensing material for environmental detection applications and would also find applications in catalysis, electrodes, or related fields.
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