On the Infrared Spectrum of Hydrogen Peroxide Matrix-Isolation Studies of the System H2O2:N2 (II)

Catalano, Edward; Sanborn, Russell H.

doi:10.1063/1.1733960

Cited by 24 publications

(13 citation statements)

References 18 publications

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“…This peak was attributed to y 6 , the asymmetric bending mode and is in agreement with the previous observations by Catalano and Sanborn, who investigated the infrared spectrum of hydrogen peroxide in nitrogen. 10 This work therefore reiterates the findings of Catalano and Sanborn in that a significant shift was observed away from the gas-phase band centre at 1266 cm À1 . 11 The water vapour in the system as a consequence of bubbling through a solution of aqueous hydrogen peroxide was clearly observed in the spectra in the region between 1350 and 2000 cm À1 .…”

Section: Resultssupporting

confidence: 88%

Calibration of a Fourier transform infrared spectrometer for hydrogen peroxide vapour measurement

Hill

Turner

2011

Anal. Methods

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Section: Resultssupporting

confidence: 88%

Calibration of a Fourier transform infrared spectrometer for hydrogen peroxide vapour measurement

Hill

Turner

2011

Anal. Methods

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“…In addition to this, the band at 1292 cm -1 in ZnO-treated GZ3 strongly suggests the presence of O-H asymmetric bending in H 2 O 2 which is absent in pure glucose and bare GZ3. It confirms the oxidation of glucose to form the gluconic acid and H 2 O 2 [42,45]. As a result, the oxidation reaction provides two electrons as discussed in the above equation and these electrons can transfer to the ZnO:rgo composite as it is an efficient electron acceptor which enhances the electronhole pair recombination resulting in the enhancement of the band emission at 574 nm.…”

Section: Glucose Sensingsupporting

confidence: 56%

Morphological tuned preparation of zinc oxide: reduced graphene oxide composites for non-enzymatic fluorescence glucose sensing and enhanced photocatalysis

Sivalingam

Karthikeyan

2016

Appl. Phys. A

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Zinc oxide: reduced graphene oxide (ZnO:rgo) composites with varying ZnO morphologies have been synthesized towards the application of non-enzymatic fluorescence (FL) glucose sensor and photocatalysis for methylene blue (MB) degradation. The phase structure of ZnO has confirmed by X-ray diffraction studies, and the band gap calculations were done by UV absorption spectra. Scanning electron microscope and Raman spectra revealed the morphological change and the vibrational studies of the prepared samples, respectively. The quenching of the FL emission band of ZnO:rgo composite sample confirmed the transfer of electrons from ZnO to rgo which inhibit the exciton recombination process. The non-enzymatic FL glucose sensing was carried out by the addition of dextrose glucose (D-glucose) into the ZnO:rgo composite solution, which shows strong relationship between glucose concentration and the FL intensity. The photocatalytic studies showed that composite with high surface to volume ratio exhibits a maximum degradation of MB over 93 %. Our combined results ensured that the ZnO:rgo composites with varying morphologies could be an effective system for applications such as FL-based glucose sensing and photocatalytic degradation.

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“…Multiple infrared studies have shown the presence of both bulk and monomer features. [20][21][22][23]25,27 For H 2 O 2 the bulk and monomer contributions are separated (3572 and 3581 cm À1 vs. 1370 cm À1 , respectively). The OH-stretch monomer features of H 2 O at 3724 and 3732 cm À1 are not observed and we therefore conclude that water is not abundantly formed in O 2 -rich environments.…”

Section: Discussionmentioning

confidence: 99%

Water formation at low temperatures by surface O2 hydrogenation II: the reaction network

Cuppen

Ioppolo

Romanzin

et al. 2010

Phys. Chem. Chem. Phys.

138

189

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Water is abundantly present in the Universe. It is the main component of interstellar ice mantles and a key ingredient for life. Water in space is mainly formed through surface reactions. Three formation routes have been proposed in the past: hydrogenation of surface O, O 2 , and O 3 . In a previous paper [Ioppolo et al., Astrophys. J, 2008, 686, 1474 we discussed an unexpected nonstandard zeroth order H 2 O 2 production behaviour in O 2 hydrogenation experiments, which suggests that the proposed reaction network is not complete, and that the reaction channels are probably more interconnected than previously thought. In this paper we aim to derive the full reaction scheme for O 2 surface hydrogenation and to constrain the rates of the individual reactions. This is achieved through simultaneous H-atom and O 2 deposition under ultra-high vacuum conditions for astronomically relevant temperatures. Different H/O 2 ratios are used to trace different stages in the hydrogenation network. The chemical changes in the forming ice are followed by means of Reflection Absorption Infrared Spectroscopy (RAIRS). New reaction paths are revealed as compared to previous experiments. Several reaction steps prove to be much more efficient (H+O 2 ) or less efficient (H+OH and H 2 +OH) than originally thought. These are the main conclusions of this work and the extended network concluded here will have profound implications for models that describe the formation of water in space. Laboratory experiments show that the formation of water in space is much more complex (green + red arrows) than previously thought (just green).Due to a copyright agreement we are not allowed to publish the full paper on arXiv.org. Please look here for the paper. We apologise for any inconvenience.

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On the Infrared Spectrum of Hydrogen Peroxide Matrix-Isolation Studies of the System H2O2:N2 (II)

Cited by 24 publications

References 18 publications

Calibration of a Fourier transform infrared spectrometer for hydrogen peroxide vapour measurement

Calibration of a Fourier transform infrared spectrometer for hydrogen peroxide vapour measurement

Morphological tuned preparation of zinc oxide: reduced graphene oxide composites for non-enzymatic fluorescence glucose sensing and enhanced photocatalysis

Water formation at low temperatures by surface O2 hydrogenation II: the reaction network

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