Facile preparation of stable palygorskite/methyl violet@SiO2 “Maya Violet” pigment

Zhang, Yujie; Zhang, Junping; Wang, Aiqin

doi:10.1016/j.jcis.2015.07.030

Cited by 35 publications

(25 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The color is not discharged by boiling nitric acid nor by heating much below redness [11]. Inspired by the ancient durable Maya blue pigment, a series of clay minerals were used to prepare clay/dye hybrid pigments, including montmorillonite [12][13][14][15][16][17][18][19][20], palygorskite [21][22][23][24][25][26][27], sepiolite [28][29][30][31][32][33] etc. [34], a natural nanotubular clay mineral, is a promising host for organic-inorganic hybrid pigments.…”

Section: Introductionmentioning

confidence: 99%

Dressing protective clothing: stabilizing alizarin/halloysite hybrid pigment and beyond

et al. 2019

View full text Add to dashboard Cite

The fading of organic dyes is a serious challenge for conservation of art works. Inspired by the ancient Maya blue pigment, a hybrid pigment of halloysite (Hal) and alizarin (AZ) was prepared by adsorption in aqueous solution. In addition, a layer of polyorganosilane (POS) is used to cover the surface of the hybrid pigment to enhance the chemical resistance and photostability. The hybrid pigments were characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared and thermal analysis. The adsorption behavior of AZ onto Hal was investigated and optimized. AZ-Hal hybrid pigment was prepared at pH = 9. Chemical stability was checked by 1 mol/L HCl, 1 mol/L NaOH and ethanol attack. Photostability was evaluated by exposing the pigment to visible light for 360 h, which is equal to more than 28 years in a common museum. AZ molecules were adsorbed on the external and/or internal surface via physical adsorption and hydrogen bonds. The presence of POS in the hybrid pigment influences positively the chemical and light resistance. This may be due to the protective layer that isolates sensitive dyes and oxidizing agents.

show abstract

Section: Introductionmentioning

confidence: 99%

Dressing protective clothing: stabilizing alizarin/halloysite hybrid pigment and beyond

et al. 2019

View full text Add to dashboard Cite

show abstract

“…FTIR spectra of PAL clay and of the FL1 and FL2 derived hybrid pigments were recorded in the region from 4000 cm -1 to 500 cm -1 (Figure 2.S4 of the Supplementary Material). The raw clay exhibits absorption bands in the range 3000-3600 cm -1 , along with a band at 1654 cm -1 , corresponding respectively to the stretching and bending vibrations of water molecules (coordinated and zeolitic) (Frost et al, 2010;Zhang et al, 2015cZhang et al, , 2015d. The region 3000-3600 cm -1 also includes contributions from the OH-stretching vibrations of Mg/Al-OH groups (Frost et al, 2010;Zhang et al, 2015d).…”

Section: Spectroscopic and Photophysical Studiesmentioning

confidence: 99%

“…The raw clay exhibits absorption bands in the range 3000-3600 cm -1 , along with a band at 1654 cm -1 , corresponding respectively to the stretching and bending vibrations of water molecules (coordinated and zeolitic) (Frost et al, 2010;Zhang et al, 2015cZhang et al, , 2015d. The region 3000-3600 cm -1 also includes contributions from the OH-stretching vibrations of Mg/Al-OH groups (Frost et al, 2010;Zhang et al, 2015d). The band at 3615 cm -1 corresponds to Al-OH stretching (Frost et al, 2010;Zhang et al, 2015d) and/or Si-OH stretching .…”

Section: Spectroscopic and Photophysical Studiesmentioning

confidence: 99%

“…The region 3000-3600 cm -1 also includes contributions from the OH-stretching vibrations of Mg/Al-OH groups (Frost et al, 2010;Zhang et al, 2015d). The band at 3615 cm -1 corresponds to Al-OH stretching (Frost et al, 2010;Zhang et al, 2015d) and/or Si-OH stretching . Bands in the range from 975 to 1196 cm -1 are attributed to Si-O vibrations (Frost et al, 2010;Zhang et al, 2015c) and the weak band at 797 cm -1 is characteristic of quartz impurities (Frost et al, 2010;.…”

Section: Spectroscopic and Photophysical Studiesmentioning

confidence: 99%

“…The porous structure of this clay allows the insertion and/or adsorption of organic molecules and ions, making it a good adsorbent Mu and Wang, 2016). Recent studies involving dyes and PAL clay have obtained several novel Maya Blue-like pigments Zhang et al, 2015cZhang et al, , 2015d, some of which are materials with interesting self-cleaning properties . Adsorption of dyes onto PAL and PAL composites (Mu and Wang, 2016) and biomedical applications clay-drug hybrid materials (Kim et al, 2016) have been recently reviewed and the use of PAL as an adsorbent for environmental remediation continues to be of interest (Ugochukwu et al, 2013;Boudriche et al, 2015;Yang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hybrid pigments from fibrous clays and chromophores inspired by the color of fruits, flowers and wine

Silva¹

View full text Add to dashboard Cite

Features such as color, brightness, fluorescence and stability are extremely important in applications of pigments. Anthocyanins, the natural pigment responsible for most of the purple, blue and red colors of flowers and fruits, have great potential for practical applications as dyes or antioxidants. However, these applications are limited by their chemical reactivity, which is affected by several factors, including pH, temperature, light, and oxygen, among others. Hybrid materials inspired by the ancient Maya Blue pigment are a promising alternative to improve the properties and applicability of natural and synthetic dyes. Flavylium cations serve as models for the chemical and photochemical reactivity of anthocyanins. Likewise, pyranoflavylium cations serve as models of the fundamental chromophoric moiety of pyranoanthocyanins, molecules that can form from reactions of the grape anthocyanins in red wines during their maturation. Fibrous clays, constituents responsible by the excellent stability of Maya blue pigment, have channels that can potentially allow partial or full insertion of these dyes molecules. Therefore, in the present thesis, hybrid pigments were prepared by the adsorption of a series of synthetic flavylium cations and synthetic pyranoflavylium cations on the fibrous clays palygorskite and sepiolite and their photophysical properties and stability were evaluated. The observation of biexponential fluorescence decays is consistent with emission from dye molecules adsorbed at two distinct sites on the fibrous clays. The fluorescence properties of dye molecules can be improved, depending on the amount of dyes adsorbed on the clay, by the formation of dye/clay hybrids. The color of the adsorbed dye molecules was somewhat more resistant to changes in external pH, photochemical stability was maintained and the thermal lability was markedly improved. Besides the development of novel hybrid flavylium cation/fibrous clay, we have achieved advances in the stabilization of these dye molecules, with regard mainly to the pH-dependent equilibrium and thermal treatment. In addition, the present work represents the first systematic study of hybrid materials prepared from pyranoflavylium cations. Therefore, the results obtained here definitively point to flavylium cations and pyranoflavylium cations as promising chromophores and fibrous clays as promising substrates for the development of novel, highly fluorescent hybrid pigments with attractive colors and marked chemical and thermal stability.

show abstract

Palygorskite Nanomaterials: Structure, Properties, and Functional Applications

Wang

2019

Nanomaterials From Clay Minerals

View full text Add to dashboard Cite

Facile preparation of stable palygorskite/methyl violet@SiO2 “Maya Violet” pigment

Cited by 35 publications

References 51 publications

Dressing protective clothing: stabilizing alizarin/halloysite hybrid pigment and beyond

Dressing protective clothing: stabilizing alizarin/halloysite hybrid pigment and beyond

Hybrid pigments from fibrous clays and chromophores inspired by the color of fruits, flowers and wine

Palygorskite Nanomaterials: Structure, Properties, and Functional Applications

Contact Info

Product

Resources

About