Action of light on the gas adsorption by solids

Terenin, A.; Solonitzin, Yu.

doi:10.1039/df9592800028

Cited by 56 publications

(12 citation statements)

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“…1, b, c). The latter phenomenon has been observed in previous work (7,8,9) and is generally ascribecl to absorption by electrons in the conduction band. These nlay be produced by an increase in non-stoichiometry caused by loss of oxygen or the introduction of excess zinc.…”

Section: Discussionmentioning

confidence: 68%

“…Since the small dipole in CO is -C--Of, structures in which the oxygen is interacting with the negatively charged surface cannot be neglected. (For a discussion of oxygen chemisorption on zinc oxide surfaces and the resulting negatively charged surface species, see, for instance, Stone (11,12) and Terenin and Solonitzin (8).) In a separate experiment, the gas desorbed after CO had been adsorbed on zinc Can.…”

Section: Discussionmentioning

confidence: 99%

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INFRARED SPECTRA OF GASES CHEMISORBED ON ZINC OXIDE: I. CO AND CO₂

Taylor¹,

Amberg²

1961

Can. J. Chem.

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The infrared spectra of CO and CO? adsorbed on zinc oxide have been observed in the regloll 2-9 p. 'I'he results show that CO does not exist a s such on the surface a t 155' C, but is immediately oxidized to CO?. There is no evidence for carbonate formation in the adsorption of CO, the spectra corresponding to structures of the carboxylate type. A band is observed a t 2174 cm-' for CO a t 25' C which nlay correspond to dipole interaction or to a n oxidation step. INTRODUCTIOK

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Section: Discussionmentioning

confidence: 68%

Section: Discussionmentioning

confidence: 99%

INFRARED SPECTRA OF GASES CHEMISORBED ON ZINC OXIDE: I. CO AND CO₂

Taylor¹,

Amberg²

1961

Can. J. Chem.

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“…Most pioneering studies focused on understanding the changes in molecular structure induced by adsorption of molecules on solid surfaces [53][54][55], with light being an active factor in transforming these adsorbates. The effects of photodissociation and photodesorption of adsorbed molecules have been established together with the photoadsorption of simple molecules on dispersed semiconductors [55,56].…”

Section: Influence Of Molecular Spectroscopy On Heterogeneous Photocamentioning

confidence: 99%

Heterogeneous Photocatalysis and Prospects of TiO2-Based Photocatalytic DeNOxing the Atmospheric Environment

Serpone

2018

Catalysts

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This article reviews the efforts of the last two decades to deNOxify the atmospheric environment with TiO2-based photocatalytic materials supported on various cementitious-like substrates. Prior to undertaking this important aspect of applied photocatalysis with metal-oxide emiconductor photocatalysts, however, it is pertinent to describe and understand the fundamentals of Heterogeneous Photocatalysis. The many attempts done in a laboratory setting to degrade (deNOxify) the major components that make up the NOx, namely nitric oxide (NO) and nitrogen dioxide (NO2), but most importantly the efforts expended in deNOxifying the real environment upon depositing titania-based coatings on various model and authentic infrastructures, such as urban roads, highway noise barriers, tunnels, and building external walls among others, are examined. Both laboratory and outdoor experimentations have been performed toward NOx being oxidized to form nitrates (NO3−) that remain adsorbed on the TiO2-based photocatalytic surfaces (except in tunnels—indoor walls) but get subsequently dislodged by rain or by periodic washings of the infrastructures. However, no serious considerations have been given to the possible conversion of NOx via photocatalytic reduction back to N2 and O2 gases that would restore the atmospheric environment, as the adsorbed nitrates block the surface-active sites of the photocatalyst and when washed-off ultimately cause unduly damages to the environment.

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“…A Tektronic Type 564 storage oscilloscope was used to measure luminescent lifetimes. Ultraviolet and visible transmission and reflectance spectra were obtained using a Cary 14 Tensile strengths of the dyed and undyed nylon yarns, before and after irradiation, were measured on a constant rate of extension Instron Model TM-M tensile tester. A gauge length of 25.4 cm and an extension rate of 20 cm/& were employed.…”

Section: Materials and Analysesmentioning

confidence: 99%

Photophysical processes in poly(hexamethylene adipamide)–acid dye complexes: Energetics of nylon 66 phototendering

Koenig¹,

Roberts²

1975

J of Applied Polymer Sci

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synopsisThe mechanism of dye-sensitized photo-oxidative degradation of nylon 66 was investigated.A .known phototendering dye, C.I. Acid Blue 40 (l-amino4(paminoacetanilide)-2-anthraquinone sodium sulfonate), was used for this study. Excitation and emission spectra of the dyed and undyed nylons indicated that a ground-state complex between the dye and the polyamide waa formed upon dyeing. The energy level of the complex's electronic states favor triplet-triplet energy transfer from the nylon to the complex. Quenching studies show that the energy transfer occurs efficiently with a rate constant of 45.8 1. mole-' sec-l. An additional energy transfer occurs between the excited free dye and the complex by either a singlet-triplet or a triplet-triplet mechanism. Kinetic analysis of the nylon-complex energy transfer suggests that the triplet energy of nylon migrates 24 to 33 A along the amide chromophores in an exciton fghion until an energy trapping complex is reached. Energy is then transferred by an exchange mechanism. Photo-oxidative studies verify that the dye-nylon complex sensitizes the polyamide photo-oxidative degradation at its own expense without dye photobleaching.

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Action of light on the gas adsorption by solids

Cited by 56 publications

References 1 publication

INFRARED SPECTRA OF GASES CHEMISORBED ON ZINC OXIDE: I. CO AND CO₂

INFRARED SPECTRA OF GASES CHEMISORBED ON ZINC OXIDE: I. CO AND CO₂

Heterogeneous Photocatalysis and Prospects of TiO2-Based Photocatalytic DeNOxing the Atmospheric Environment

Photophysical processes in poly(hexamethylene adipamide)–acid dye complexes: Energetics of nylon 66 phototendering

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Action of light on the gas adsorption by solids

Cited by 56 publications

References 1 publication

INFRARED SPECTRA OF GASES CHEMISORBED ON ZINC OXIDE: I. CO AND CO2

INFRARED SPECTRA OF GASES CHEMISORBED ON ZINC OXIDE: I. CO AND CO2

Heterogeneous Photocatalysis and Prospects of TiO2-Based Photocatalytic DeNOxing the Atmospheric Environment

Photophysical processes in poly(hexamethylene adipamide)–acid dye complexes: Energetics of nylon 66 phototendering

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Product

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INFRARED SPECTRA OF GASES CHEMISORBED ON ZINC OXIDE: I. CO AND CO₂

INFRARED SPECTRA OF GASES CHEMISORBED ON ZINC OXIDE: I. CO AND CO₂