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

doi:10.3390/s110404060

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

^*Corresponding author for this work

Institute of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	4060-4072
Number of pages	13
Journal	Sensors
Volume	11
Issue number	4
DOIs	https://doi.org/10.3390/s110404060
State	Published - Apr 2011

Keywords

Ammonia gas
Bromocresol green dye
Mesoporous silica material
Optical sensor
UV-Vis absorbance

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10.3390/s110404060

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title = "Bromocresol green/mesoporous silica adsorbent for ammonia gas sensing via an optical sensing instrument",

abstract = "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.",

keywords = "Ammonia gas, Bromocresol green dye, Mesoporous silica material, Optical sensor, UV-Vis absorbance",

author = "Chang, {Yu Chang} and Hsun-Ling Bai and Li, {Shou Nan} and Kuo, {Chun Nan}",

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T1 - Bromocresol green/mesoporous silica adsorbent for ammonia gas sensing via an optical sensing instrument

AU - Chang, Yu Chang

AU - Bai, Hsun-Ling

AU - Li, Shou Nan

AU - Kuo, Chun Nan

PY - 2011/4

Y1 - 2011/4

N2 - 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.

AB - 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.

KW - Ammonia gas

KW - Bromocresol green dye

KW - Mesoporous silica material

KW - Optical sensor

KW - UV-Vis absorbance

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

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Keywords

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