Preparation and characterization of a luminescent carbon dots grafted CaSiO3: Eu3+ phosphor for ratiometric fluorescent oxygen sensing

被引：17
作者：
Wang, Li [1 ]
Zhang, Haoran [1 ]
Zhou, Xiaohua [1 ]
Liu, Yingliang [1 ]
Lei, Bingfu [1 ]
机构：
[1] South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Guangdong, Peoples R China
来源：
RSC ADVANCES | 2016年 / 6卷 / 101期
关键词：
MESOPOROUS SILICA NANOPARTICLES; GADOLINIUM LABELED PORPHYRIN; GRAPHENE QUANTUM DOTS; SENSOR; MECHANISM; COPOLYMER; NANODOTS; STATE; PROBE;
D O I：
10.1039/c6ra20380a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：98554 / 98562
页数：9
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