期刊
RARE METALS
卷 40, 期 6, 页码 1561-1570出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-020-01636-6
关键词
Nitrogen-doped graphene quantum dots; Formaldehyde sensor; Two-dimensional SnO2; Nanocomposites
资金
- National Natural Science Foundation of China [62071300, 51702212]
- Science and Technology Commission of Shanghai Municipality [18511110600, 19ZR1435200, 20490761100]
- Innovation Program of Shanghai Municipal Education Commission [2019-01-07-00-07-E00015]
- Program of Shanghai Academic/Technology Research Leader [19XD1422900]
- Chenguang Scholar Project of Shanghai Education Commission [19CG52]
- Cross-Program of Medical Engineering
The synthesis of N-GQDs/SnO2 nanocomposite for HCHO detection showed high efficiency and extended the research and application potential of GQDs nanocomposites.
Formaldehyde (HCHO) is widely known as an indoor air pollutant, and the monitoring of the gas has significant importance. However, most HCHO sensing materials do not have low detection limits and operate at high temperatures. Herein, two-dimensional (2D) mesoporous ultrathin SnO2 modified with nitrogen-doped graphene quantum dots (N-GQDs) was synthesized. The N-GQDs/SnO2 nanocomposite demonstrated high efficiency for HCHO detection. With the addition of 1.00 wt% N-GQDs, the response (R-a/R-g) of SnO2 gas sensor increased from 120 to 361 at 60 degrees C for the detection of 10 x 10(-6) HCHO. In addition, the corresponding detection limit was as low as 10 x 10(-9). Moreover, the sensor exhibited excellent selectivity and stability for the detection of HCHO. The enhanced sensing performance was attributed to both the large specific surface area of SnO2 and electron regulation of N-GQDs. Therefore, this study presents a novel HCHO sensor, and it expands the research and application potential of GQDs nanocomposites.
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