Chemiluminescence as a means of revealing intermediate stages in adsorption and catalysis

Claudel, B.; Breysse, M.; Fauré, Matthieu; Guenin, M.

doi:10.1007/bf03055541

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…Based on various observations of the oxidation of carbon monoxide on ThO 2 , Claudel et al 6 have presented a mechanism of luminescence emission during catalytic oxidation. They concluded that hole-trapped surface states are produced by the chemisorption of CO, and that electron-trapped surface states are produced by the chemisorption of O on ThO 2 .…”

Section: Discussionmentioning

confidence: 99%

Detection of Organic Molecules Dissolved in Water Using a γ-Al2O3 Chemiluminescence-Based Sensor

1998

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Chemiluminescence measurement is a very useful method for detecting molecules. This method has high sensitivity, good reproducibility and selectivity, quick response and good linearity over a wide concentration region. However, it is not convenient for continuous and long-term detection, because a supply of reactants to produce luminescent species through a chemical reaction is required. Although many investigations have attempted to improve these disadvantages since 1960 1-4 , a long-term stability of the sensitivity has hardly been attained. A new possibility of a CL-based sensor which does not require a supply of reactants was proposed by Breysse et al. in 1976. 5 They observed CL during the catalytic oxidation of carbon monoxide on a thoria surface. In 1990, we found that CL is observed during the catalytic oxidation of organic vapors on an alumina surface. 7 These phenomena can be applied to CL-based sensors. Various methods to detect organic vapors in air have been reported elsewhere. [8][9][10][11] In this paper, we deal with a method used to detect organic molecules, e.g. acetone and ethanol, dissolved in water using this sensor. We will describe the elementary working mechanism of the sensor and its working condition under which the response is quick and stable. Figure 1 shows a schematic diagram of the measuring system for a CL-based sensor. The CL-based sensor is made of a sintered layer of γ-Al 2 O 3 powder with a thickness of 0.5 mm. The pasty mixture of the powder and aluminum nitrate solution of 2 M was laid on a ceramic substrate (3 mm×1.5 mm), and then heated at 900˚C for 2 h. The sensor was heated by an electric heater made of Pt film laid on the reverse side of the substrate. The sensor was placed in a quartz tube having two bundles of Teflon tubes of 1 mm in diameter at both ends of the tube in order to keep the movement of the gas around the sensor in a laminar flow. A sample solution containing organic molecules was placed in a vaporizer kept at a constant temperature. The vapor was mixed with synthesized air (a mixture of 21% oxygen and 79% nitrogen). The mixed gas at atmospheric pressure flowed through the quartz tube and was removed by a diaphragm pump. The mean-flow velocity of the sample gas in the tube (v) was controlled by a mass-flow controller. The chemiluminescence from the sensor was measured by a photomultiplier through optical filters using a photon-counting technique. For the CL spectrum measurements, a spectrometer was used instead of these filters. The CL intensity at each wavelength was measured at a resolution of 10 nm. The concentration of the organic molecules in the mixed gas was monitored by a mass spectrometer through a differential evacuating system. The results of a catalytic reaction on the sensor were also detected by the mass spectrometer. A new method is proposed for recognizing organic molecules dissolved in water using a chemiluminescence-based sensor made with a γ-Al2O3 catalyst. When a mixture of air and organic molecules, e.g. ethanol and acetone vaporize...

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Section: Discussionmentioning

confidence: 99%

Detection of Organic Molecules Dissolved in Water Using a γ-Al2O3 Chemiluminescence-Based Sensor

1998

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“…and was defined as “cataluminescence”. Application of the luminescence has been developed as a means of revealing intermediate stages in adsorption and catalysis . In recent years, Nakagawa et al , observed chemiluminescence during the catalytic oxidation of organic vapors on γ-aluminum oxide (γ-Al 2 O 3 ) and γ-Al 2 O 3 activated by Dy 3+ .…”

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confidence: 99%

“…Application of the luminescence has been developed as a means of revealing intermediate stages in adsorption and catalysis. 2 In recent years, Nakagawa et al 3,4 observed chemiluminescence during the catalytic oxidation of organic vapors on γ-aluminum oxide (γ-Al 2 O 3 ) and γ-Al 2 O 3 activated by Dy 3+ . No further research about this kind of luminescence has been reported besides the three bulk solids mentioned above.…”

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confidence: 99%

Development of a Gas Sensor Utilizing Chemiluminescence on Nanosized Titanium Dioxide

et al. 2001

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A gas-sensing mode based on chemiluminescence generated on the surface of nanosized materials is proposed in the present work. Seven nanosized materials were tested, and chemiluminescence was detected from six of them during the catalytic oxidation of organic vapors in air. The luminescence characteristics of ethanol and acetone vapors passing through the surface of TiO2 chosen were studied with a chemiluminescence-based detection system. The linear range of chemiluminescence intensity versus concentration of organic compounds is 40-400 microg/mL for ethanol and 20-200 microg/mL for acetone dissolved in water, respectively. X-ray powder diffraction and Raman spectrometry were used to investigate the changes in catalytic activity of TiO2 after a 60-h reaction at 380 degrees C. The results showed that the carbon deposited on the surface of TiO2, decreasing the catalytic activity, but can be removed in air by controlling the temperature at 500 degrees C for 3 h. Regenerability and no consumption of sensor substrate signify the long lifetime of the gas sensor.

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“…Absolute configuration, 176 Activation and reaction volumes, 46 Acylation, 4-(dialkylamino)pyridines in, 34 Alkaloids, isoquinoline, 182 Lauraceae, 57 spirobenzylisoquinoline, 66 Alkanes, oxgenation with super acids, 42 Alkynes, metal complexes in synthesis, 164 natural antimycotic, 99 in pyridine synthesis, 32 Alienes, synthesis of enallenes, 105 Alumina, organic reactions on, 31 Amidyl radicals, reactivity, 123 Amino acids, oi-alkylamino, 132 codon activation, 38 industrial, 95 Angiotensin, 131 Antibiotics, acetylenic antimycotic, 99 sugar components of, 17 Aroma, naturally occurring, 80 structure and, 50 Aromatic cmpds, arene complexes, 165 biosynthesis, 124 by dehydrogenation, 43 multilayered and bridged, 161 natl occ, 13C NMR, 65 polynuclear, 3 Aromatic substitution, of nitro groups, 119 nucleophilic, Sn(ANRORC), 14 by SrnI mechanism, 11 Carbohydrates, binding by proteins, 18 boronate esters, 16 galactomannans, 19 Carbonyliron, stabilization with, 141 Catalysis, acid-base, 1 acylation, by 4-(dialkylamino)pyridines, 34 on alumina surfaces, 31 bifunctional, 101 chemiluminescence in, 84 homogeneous, 4 hydrogenation, 174 phase-transfer, 87,183 polymeric, 39 Chemiluminescence, in absorption, 84 Chlorophyll, 170,172 Cobalt catalysts in pyridine sysnthesis, 32 Complexes, alkyne-transition metal, 164 arene, 165 cation with crown cmpds, 158 chelate, stereochem. 126 of diazo cmpds, 181 organoiron, 140,141 Conductors, organic, electronic struct, 75 Conformation, angiotensin, 131 five-membered rings, 125 nucleoside, by NMR, 81 Coumarins, nat occurring, 79 Crown cmpds, 155-160 Cyanates, 180 Cy...…”

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confidence: 99%

Recent Reviews

1979

J. Org. Chem.

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Chemiluminescence as a means of revealing intermediate stages in adsorption and catalysis

Cited by 8 publications

References 29 publications

Detection of Organic Molecules Dissolved in Water Using a γ-Al2O3 Chemiluminescence-Based Sensor

Detection of Organic Molecules Dissolved in Water Using a γ-Al2O3 Chemiluminescence-Based Sensor

Development of a Gas Sensor Utilizing Chemiluminescence on Nanosized Titanium Dioxide

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