Synthesis and Characterization of Novel Super Microporous Tin-doped Zirconium Oxide

Kong, Yan; Ma, Hua; Wang, Jun; Ren, Xiaoqian; Yan, Qijie

doi:10.1002/cjoc.200591584

Cited by 5 publications

(1 citation statement)

References 30 publications

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“…Zirconia is stable metal oxide support due to its high dielectric constant, chemical and thermal stability, and exhibits amphoteric nature . The Bronsted‐Lewis acidity of zirconia can be significantly enhanced by sulfate loading on it, which results in a super acid .…”

Section: Introductionmentioning

confidence: 99%

Environmentally Benign Approach for the Synthesis of Azo Dyes in the Presence of Mesoporous Sulfated Core‐Shell Zirconia‐Copper(I) Oxide Solid Acid Catalyst

et al. 2019

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Sulfated solid acid catalyst finds application mainly in the reactions which requires acid sites. Synthesis of azo dyes by diazo coupling in presence of sulfated core shell zirconiacopper oxide solid acid catalyst (Cu(I)@ZrO 2 -SO 4 2À ) has been discussed hereunder. A detailed investigation on, the effect of sulfate loading, surface area and surface acidity for the synthesis of azo dyes has been demonstrated. As sulfate loading increased on the catalyst, it decreased its surface area and this was evident from the Brunauer Emmett Teller surface area analysis. The robust catalytic activity of Cu(I)@ZrO 2 -SO 4 2À catalyst was due to its super acidity, which arises due to the presence of both Bronsted and Lewis acid sites, this was experimentally confirmed by Pyridine-Fourier transform infrared spectroscopy and ammonia-temperature programmed desorption studies. X-ray diffraction, transmission electron microscopy and selected area electron diffraction techniques provided detailed information about the effect of sulfate loading on phase and crystal structure of the catalyst. In the present work we describe a simple, efficient and environmentally benign catalytic process for the synthesis of azo dyes.[a] L. Parashuram, Dr.

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Section: Introductionmentioning

confidence: 99%

Environmentally Benign Approach for the Synthesis of Azo Dyes in the Presence of Mesoporous Sulfated Core‐Shell Zirconia‐Copper(I) Oxide Solid Acid Catalyst

et al. 2019

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Laser Flash Photolysis Studies on Gallic Acid

et al. 2006

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The transient species of gallic acid (GA) have been studied by 266 nm nanosecond laser flash photolysis in aqueous solution and acetonitrile. The intermediate with absorption at 320 nm was identified as excited triplet state ( 3 GA*), the decay rates of which were obtained in aqueous solution and acetonitrile respectively. Energy transfer from 3 GA* to β-carotene was observed and the energy transfer rate constant k ent was determined to be 2.2×10 9 mol -1 •L•s -1 . GA underwent photoionization during photolysis and the quantum yield of photoionization was determined to be 0.12 at room temperature with KI as a reference.

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Application of Multivariate Calibration Techniques to Simultaneous Spectrophotometric Determination of Copper and Iron Using 1‐(2‐Pyridylazo)‐2‐naphthol in AOT Micellar Solution

et al. 2008

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Multivariate calibration models (PCR and PLS) were developed for simultaneous determination of Fe(III) and Cu(II) with 1-(2-pyridylazo)-2-naphthol and AOT as chromogenic reagent and micellizing agent, respectively. In the presence of AOT the spectrum of Fe(III)-PAN complex was shifted to higher wavelength and the overlapping with Cu-PAN spectrum decreased. It seems that this anionic surfactant enters the structure of the Fe-PAN complex to cause a shift in the absorption spectrum of it. The parameters controlling behavior of the systems were investigated and optimum conditions were selected. Sixteen ternary mixtures were selected as the calibration set. To select the number of factors in PCR and PLS algorithms, a cross validation method, leaving out one sample at a time, was employed. The calibration models were validated with 8 synthetic mixtures containing the metal ions in different proportions that were randomly designed. The best calibration model was obtained by using PLS regression. The method was successfully applied to simultaneous determination of copper and iron in biological samples.

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Synthesis and Characterization of Novel Super Microporous Tin-doped Zirconium Oxide

Cited by 5 publications

References 30 publications

Environmentally Benign Approach for the Synthesis of Azo Dyes in the Presence of Mesoporous Sulfated Core‐Shell Zirconia‐Copper(I) Oxide Solid Acid Catalyst

Environmentally Benign Approach for the Synthesis of Azo Dyes in the Presence of Mesoporous Sulfated Core‐Shell Zirconia‐Copper(I) Oxide Solid Acid Catalyst

Laser Flash Photolysis Studies on Gallic Acid

Application of Multivariate Calibration Techniques to Simultaneous Spectrophotometric Determination of Copper and Iron Using 1‐(2‐Pyridylazo)‐2‐naphthol in AOT Micellar Solution

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