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Colorimetric Detection of Peroxide V...

Hossain, Rayhan.

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Colorimetric Detection of Peroxide Vapors.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Colorimetric Detection of Peroxide Vapors./
Author:	Hossain, Rayhan.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	102 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-07, Section: B.
Contained By:	Dissertations Abstracts International85-07B.
Subject:	Physical chemistry. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30575101
ISBN:	9798381304176

Colorimetric Detection of Peroxide Vapors.
Hossain, Rayhan.

Colorimetric Detection of Peroxide Vapors. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 102 p.

Source: Dissertations Abstracts International, Volume: 85-07, Section: B.

Thesis (Ph.D.)--Oklahoma State University, 2023.

One method for colorimetric detection of hydrogen peroxide vapor is based on a titanium hydrogen peroxide complex. A color changing material based on titania hydroxypropyl cellulose thin film was initially developed. However, as this material dries, the sensitivity of the material is significantly reduced. Thus, an alternative sensing material based on Ti(IV) oxysulfate, an ionic liquid, and in some cases, triflouromethanesulfonic acid adsorbed onto low-cost silicon thin layer chromograph (TLC) plates was developed. These sensors are disposable, one-time use and are simple and inexpensive. When resulting thin-film sensors are exposed to ppm levels of hydrogen peroxide vapor, they turn from a white reflective material to an intense yellow or orange. Ti(IV) oxysulfate combined with an acid catalyst and an ionic-liquid based material provides an opportunity to enhance the sensor activity towards the peroxide vapor and decrease the detection limit. Kinetic measurements were made by the quantification of the intensity of reflected light as a function of exposure time from the sensor in a special cell using a low-cost web camera and a tungsten lamp. The measured rate of color change indicates high sensitivity and first order kinetics over a hydrogen peroxide concentration range of approximately 2 to 30 ppm. Since the decomposition products of TATP react with titanium (IV) complex, this material could also be used to detect this explosive compound. Older work indicates that strong acids decomposed TATP into hydrogen peroxide. Additional kinetic measurements are investigated whether there is an increase in sensitivity to hydrogen peroxide, organic hydroperoxides, and TATP by adding trifluoromethanesulfonic acid to the titanium (IV) complex detecting solution. These new materials are a starting point for the preparation of more active sensor materials for hydrogen peroxide and organic peroxide vapor detection.

ISBN: 9798381304176Subjects--Topical Terms:

1981412
Physical chemistry.
Subjects--Index Terms:

Colorimetric detection

Colorimetric Detection of Peroxide Vapors.
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300 $a 102 p.
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500 $a Advisor: Materer, Nicholas F.
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520 $a One method for colorimetric detection of hydrogen peroxide vapor is based on a titanium hydrogen peroxide complex. A color changing material based on titania hydroxypropyl cellulose thin film was initially developed. However, as this material dries, the sensitivity of the material is significantly reduced. Thus, an alternative sensing material based on Ti(IV) oxysulfate, an ionic liquid, and in some cases, triflouromethanesulfonic acid adsorbed onto low-cost silicon thin layer chromograph (TLC) plates was developed. These sensors are disposable, one-time use and are simple and inexpensive. When resulting thin-film sensors are exposed to ppm levels of hydrogen peroxide vapor, they turn from a white reflective material to an intense yellow or orange. Ti(IV) oxysulfate combined with an acid catalyst and an ionic-liquid based material provides an opportunity to enhance the sensor activity towards the peroxide vapor and decrease the detection limit. Kinetic measurements were made by the quantification of the intensity of reflected light as a function of exposure time from the sensor in a special cell using a low-cost web camera and a tungsten lamp. The measured rate of color change indicates high sensitivity and first order kinetics over a hydrogen peroxide concentration range of approximately 2 to 30 ppm. Since the decomposition products of TATP react with titanium (IV) complex, this material could also be used to detect this explosive compound. Older work indicates that strong acids decomposed TATP into hydrogen peroxide. Additional kinetic measurements are investigated whether there is an increase in sensitivity to hydrogen peroxide, organic hydroperoxides, and TATP by adding trifluoromethanesulfonic acid to the titanium (IV) complex detecting solution. These new materials are a starting point for the preparation of more active sensor materials for hydrogen peroxide and organic peroxide vapor detection.
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