Mr. Jiaxiang Liu Profile

Jiaxiang Liu

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 4 April 2023 Paper

Effects of thermal decomposition and adsorption on photoacoustic detection of nitrogen dioxide

Zhengang Li, Jiaxiang Liu, Ying Pan, Yonghua Fang

Proceedings Volume 12617, 1261731 (2023) https://doi.org/10.1117/12.2665451

KEYWORDS: Photoacoustic spectroscopy, Signal detection, Thermal effects, Adsorption, Nitrogen dioxide, Photolysis, Signal to noise ratio, Light sources, Temperature metrology, Temperature control

Read Abstract +

Nitrogen dioxide (NO2) is a toxic gas to organisms, and one of the main factors in forming acid rain. Recently, some scholars have developed NO2 photoacoustic detection setups, but there are few reports about the effects of thermal decomposition and adsorption on photoacoustic detection of NO2. This work carried out detailed research on NO2 photoacoustic detection. Based on the photolysis effect of NO2, the thermal decomposition effect of NO2 excited by high-power laser was found and verified. Additionally, to reduce the influence of the adsorption effect of the photoacoustic cell wall on the detection results, a temperature control model of the photoacoustic cell was constructed, and the optimal detection temperature of 30 ℃ was ensured through experiments. The cross experimental verification was conducted with acetylene (C2H2) that was not decomposed by high temperature, which further explained the influence of NO2 thermal decomposition and adsorption effect on the detection accuracy. Based on the research results, a photoacoustic detection setup was built with a 450 nm laser and a differential H-type photoacoustic cell as the core. The experimental results showed that when the photoacoustic cell temperature was 30 ℃, the minimum detection limit of 206 ppt was achieved within 5 s average detection time. In conclusion, this work provides a reference for developing of high-precision NO2 photoacoustic detection setup.

Proceedings Article | 27 March 2022 Paper

Design of long optical path and resonant sphere-tube coupled photoacoustic cell

Zhengang Li, Zhizhen Zhu, Ganshang Si, Jiaxiang Liu, Yonghua Fang, Wenbiao Huang, Zhen Cheng, Beibei Si

Proceedings Volume 12169, 121694K (2022) https://doi.org/10.1117/12.2624134

KEYWORDS: Modulation, Optical spheres, Acoustics, Photoacoustic spectroscopy, Signal detection

Read Abstract +

Photoacoustic (PA) spectroscopy technology is widely used in the detection of various trace gases because it has some advantages such as zero background detection, strong reliability and high sensitivity. The capability of gas detection is directly affected by the performance of the PA cell as an important part of the PA detection device. A long optical path resonant sphere-tube coupled PA cell (STCell) was designed, which based on the spherical PA cell. The inner wall of the sphere was coated with diffuse reflection material as an integrating sphere, and the modulated light was reflected multiple times in the sphere to increase the optical path. In order to further amplify the PA signal, an acoustic resonance tube was coupled with the sphere. One-dimensional longitudinal resonance frequency of the tube was used to modulate light source, the maximum PA signal was got at the end of the tube away from the sphere. When the modulated light passed through the sphere, the structure was similar to the T-type PA cell (TCell). A PA experiment was carried out to compare the performance between TCell and STCell, and the gas to be measured was NO₂. The PA signal amplitude of STCell was 10 times that of TCell when the concentration of NO₂ was 10 ppm, and the limit of detection (LOD) (3σ) was 2ppb, which was reduced by 13.5 times. In this paper, long optical path with acoustic resonance was combined, which has reference significance for the design of trace gas PA cells.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years