Bromocresol green/mesoporous silica adsorbent for ammonia gas sensing via an optical sensing instrument

Yu Chang Chang, Hsun-Ling Bai*, Shou Nan Li, Chun Nan Kuo

*此作品的通信作者

研究成果: Article同行評審

49 引文 斯高帕斯(Scopus)

摘要

A meso-structured Al-MCM-41 material was impregnated with bromocresol green (BG) dye and then incorporated into a UV-Vis DRA spectroscopic instrument for the online detection of ammonia gas. The absorption response of the Al-MCM-41/BG ammonia sensing material was very sensitive at the optical absorption wavelength of 630 nm. A high linear correlation was achieved for ppmv and sub-ppmv levels of ammonia gas. The response time for the quantitative detection of ammonia gas concentrations ranging from 0.25 to 2.0 ppmv was only a few minutes. The lower detection limit achieved was 0.185 ppmv. The color change process was fully reversible during tens of cycling tests. These features together make this mesoporous Al-MCM-41 material very promising for optical sensing applications.

原文English
頁(從 - 到)4060-4072
頁數13
期刊Sensors
11
發行號4
DOIs
出版狀態Published - 4月 2011

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