TG-MS characterization of the reaction products of cadmium yellow and malachite artist’s pigments

White, Rachel; Thomas, Paul; Philips, M. R.; Wuhrer, Richard; Guerbois, J. P.

doi:10.1007/s10973-006-8134-9

Cited by 6 publications

(7 citation statements)

References 9 publications

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“…The scatter diagrams shown in Figure 5 for the reacted mixture confirm the new association of copper with sulfur. As this is a complex heterogenous reaction (White et al, 2007), the broadened range of the nodes observed is not unsurprising. The new phases produced are not necessarily completely stoichiometric in nature, and unreacted reactant phases are also likely to be present broadening the phase associations, but the overall the shape of the scatter diagrams is the reverse of Figure 2.…”

Section: Resultsmentioning

confidence: 87%

“…Previous studies of this interaction have identified the phases resulting from the reaction as covellite (CuS, the dark discoloring product), cadmium carbonate, and hydrated cadmium sulfate (White et al, 2006). The interaction has also been investigated using thermal analysis indicating that a number of phases are produced by this complex heterogeneous reaction (White et al, 2007). The current study furthers the characterization of the reaction products using the microanalytical techniques of X-ray mapping with the subsequent generation of scatter diagrams to aid phase identification.…”

Section: Introductionmentioning

confidence: 99%

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X-Ray Mapping and Scatter Diagram Analysis of the Discoloring Products Resulting from the Interaction of Artist's Pigments

et al. 2010

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The discoloring interaction between the artist's pigments cadmium yellow and the copper-containing malachite, an interaction that is conjectured to cause black spotting in oil paintings of the 19th and early 20th centuries, was examined using X-ray mapping and scatter diagram analysis. The application of these coupled techniques confirmed that copper sulfide phases were produced during discoloration reaction. Scatter diagram analysis indicated that two copper sulfide stoichiometries (CuS and Cu3S2) were present as reaction products where previously only crystalline CuS (covellite) had been identified by X-ray diffraction. The results demonstrate the potential of X-ray mapping coupled with scatter diagram analysis for the identification of both crystalline and X-ray amorphous phases produced by such complex heterogeneous interactions and their applicability to the investigation of interactions of artists' pigments.

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Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

X-Ray Mapping and Scatter Diagram Analysis of the Discoloring Products Resulting from the Interaction of Artist's Pigments

et al. 2010

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“…The solid was dried on a hot plate at ca. 200 °C; this was because at a temperatures close to 300 °C, malachite starts to decompose [ 21 ]. The aerosol precursor solution was prepared using a malachite suspension in water followed by the addition of a suitable ligand to complex Cu 2+ ions, thus preventing the direct precipitation of copper vanadate, once the vanadate source is added.…”

Section: Methodsmentioning

confidence: 99%

Visible Light Driven Photoanodes for Water Oxidation Based on Novel r-GO/β-Cu2V2O7/TiO2 Nanorods Composites

et al. 2018

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This paper describes the preparation and the photoelectrochemical performances of visible light driven photoanodes based on novel r-GO/β-Cu2V2O7/TiO2 nanorods/composites. β-Cu2V2O7 was deposited on both fluorine doped tin oxide (FTO) and TiO2 nanorods (NRs)/FTO by a fast and convenient Aerosol Assisted Spray Pyrolysis (AASP) procedure. Ethylenediamine (EN), ammonia and citric acid (CA) were tested as ligands for Cu2+ ions in the aerosol precursors solution. The best-performing deposits, in terms of photocurrent density, were obtained when NH3 was used as ligand. When β-Cu2V2O7 was deposited on the TiO2 NRs a good improvement in the durability of the photoanode was obtained, compared with pure β-Cu2V2O7 on FTO. A further remarkable improvement in durability and photocurrent density was obtained upon addition, by electrophoretic deposition, of reduced graphene oxide (r-GO) flakes on the β-Cu2V2O7/TiO2 composite material. The samples were characterized by X-ray Photoelectron Spectroscopy (XPS), Raman, High Resolution Transmission Electron Microscopy (HR-TEM), Scanning Electron Microscopy (SEM), Wide Angle X-ray Diffraction (WAXD) and UV–Vis spectroscopies. The photoelectrochemical (PEC) performances of β-Cu2V2O7 on FTO, β-Cu2V2O7/TiO2 and r-GO/β-Cu2V2O7/TiO2 were tested in visible light by linear voltammetry and Electrochemical Impedance Spectroscopy (EIS) measurements.

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“…2 For example, the decomposition temperatures of the Fe 2 O 3based pigments, red and yellow ochre, have been determined by thermogravimetric (TG) analysis, 3 while X-ray diffraction and TG analysis coupled with mass spectrometry (MS) have been used to report the stability of cadmium yellow (CdS) up to 800 1C. 4 In our work, we focused on the stability of CdS up to 500 1C, with specific interest in the temperature-dependent vibrational modes rather than on decomposition or mass loss. 4 Other spectroscopic techniques currently being used include FT-IR, 5 photoacoustic IR, 6 total reflection X-ray fluorescence 7 and even synchrotron radiation spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature and pressure on selected artists' pigments

Bayne

Butler

2013

New J. Chem.

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TG-MS characterization of the reaction products of cadmium yellow and malachite artist’s pigments

Cited by 6 publications

References 9 publications

X-Ray Mapping and Scatter Diagram Analysis of the Discoloring Products Resulting from the Interaction of Artist's Pigments

X-Ray Mapping and Scatter Diagram Analysis of the Discoloring Products Resulting from the Interaction of Artist's Pigments

Visible Light Driven Photoanodes for Water Oxidation Based on Novel r-GO/β-Cu2V2O7/TiO2 Nanorods Composites

Effect of temperature and pressure on selected artists' pigments

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