Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example

doi:10.3390/s22010281

	Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example
	Li, Zhengang 1,2; Si, Ganshang 1,2; Ning, Zhiqiang 1,2; Liu, Jiaxiang 1; Fang, Yonghua 1,2; Si, Beibei 1,2; Cheng, Zhen 1,2; Yang, Changping 1,2
刊名	SENSORS
	2022
卷号	22
关键词	photoacoustic spectroscopy photoacoustic cell long optical path acoustic resonance resonance mode finite element simulation
DOI	10.3390/s22010281
通讯作者	Fang, Yonghua(yhfang@aiofm.ac.cn)
英文摘要	The concentration of trace gases in the atmospheric environment is extremely low, but it has a great impact on the living environment of organisms. Photoacoustic spectroscopy has attracted extensive attention in the field of trace gas detection because of its high sensitivity, good selectivity, and fast response. As the core of a photoacoustic detection setup, the photoacoustic cell has a significant impact on detection performance. To improve detection sensitivity, a sphere-tube coupled photoacoustic cell (STPAC) was developed, which was mainly composed of a diffuse-reflective sphere and an acoustic resonance tube. Modulated light was reflected multiple times in the sphere to increase optical path, and photoacoustic (PA) signals were further amplified by the tube. Based on STPAC, a PA gas detection setup was built with a laser diode (LD) at 450 nm as the light source. The experimental results showed that the minimum detection limit (noise equivalent concentration, NEC) of NO2 was ~0.7 parts per billion (ppb). Compared with the T-type PA cell (TPAC) in which the modulated light passed through the sphere, the signal-to-noise ratio of STPAC was increased by an order of magnitude at the same concentration of the NO2 sample.
WOS关键词	PHOTOTHERMAL SPECTROSCOPY ; MULTIPLE REFLECTIONS ; INTEGRATING SPHERE ; LASER EXCITATION ; SENSOR ; ABSORPTION ; SPECTROMETER ; TEMPERATURE ; RESONATORS
WOS研究方向	Chemistry ; Engineering ; Instruments & Instrumentation
语种	英语
出版者	MDPI
WOS记录号	WOS:000743118500001
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127131]
专题	中国科学院合肥物质科学研究院
通讯作者	Fang, Yonghua
作者单位	1.Chinese Acad Sci, Hefei Inst Phys Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhengang,Si, Ganshang,Ning, Zhiqiang,et al. Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example[J]. SENSORS,2022,22.
APA	Li, Zhengang.,Si, Ganshang.,Ning, Zhiqiang.,Liu, Jiaxiang.,Fang, Yonghua.,...&Yang, Changping.(2022).Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example.SENSORS,22.
MLA	Li, Zhengang,et al."Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example".SENSORS 22(2022).