標題: Bromocresol Green/Mesoporous Silica Adsorbent for Ammonia Gas Sensing via an Optical Sensing Instrument
作者: Chang, Yu-Chang
Bai, Hsunling
Li, Shou-Nan
Kuo, Chun-Nan
環境工程研究所
Institute of Environmental Engineering
關鍵字: ammonia gas;optical sensor;mesoporous silica material;UV-Vis absorbance;bromocresol green dye
公開日期: 1-Apr-2011
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.
URI: http://dx.doi.org/10.3390/s110404060
http://hdl.handle.net/11536/9055
ISSN: 1424-8220
DOI: 10.3390/s110404060
期刊: SENSORS
Volume: 11
Issue: 4
起始頁: 4060
結束頁: 4072
Appears in Collections:Articles


Files in This Item:

  1. 000289231600034.pdf