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Colorants, Volume 4, Issue 3

September 2025 - 7 articles

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Articles (7)

  • Article
  • Open Access
795 Views
15 Pages

Investigation of Methylene Blue Removal from Aqueous Solutions Using Biochar Derived from Mango and Pitanga Pruning Waste

  • Mariana Consiglio Kasemodel,
  • Valéria Guimarães Silvestre Rodrigues,
  • João Marcos Ribeiro Farah Silva,
  • Bruna Soares Campelo Vallim and
  • Érica Leonor Romão

19 September 2025

This research investigates the adsorption potential of mango and pitanga tree pruning waste biochar produced at 300 °C and 500 °C for the uptake of Methylene Blue (MB) dye. The particle size of biochar, initial MB concentration, adsorbent mas...

  • Article
  • Open Access
1,397 Views
24 Pages

The Study of the Historic Natural Dye Royal Purple in the Greek Region Using Selected Spectroscopic and Imaging Techniques

  • Athanasia Tsatsarou,
  • Agathi Anthoula Kaminari,
  • Athina Georgia Alexopoulou,
  • Nadia Macha Bizoumi and
  • Anna Karatzani

15 September 2025

This paper focuses on the study of the famous royal purple dye. It aims to present a holistic approach by researching historical evidence, both for its use and its production, to highlight the importance of the dye within the Greek area. As a substan...

  • Article
  • Open Access
1,627 Views
15 Pages

Investigation into the Application of Natural Dyes Obtained from Annatto Seeds and Eucalyptus Leaves in Dyeing Textile Substrates Using Biomordants

  • Louise de Sousa Barbosa,
  • Sophia Helena Alves,
  • Brenno Henrique Silva Felipe,
  • Carlos Rafael Silva de Oliveira and
  • Catia Rosana Lange de Aguiar

This study evaluated dried eucalyptus leaf extract and annatto seed extract as natural dyes for cotton, polyamide, and polyester knit fabrics. The eucalyptus leaf extract was obtained by aqueous boiling extraction, while the annatto seed extract was...

  • Article
  • Open Access
869 Views
11 Pages

Dye-Sensitized Solar Cells Application of TiO2 Using Spirulina and Chlorella Algae Extract

  • Maria Vitória França Corrêa,
  • Gideã Taques Tractz,
  • Guilherme Arielo Rodrigues Maia,
  • Hagata Emmanuely Slusarski Fonseca,
  • Larissa Oliveira Berbel,
  • Lucas José de Almeida and
  • Everson do Prado Banczek

The present study investigates dye-sensitized solar cells (DSSCs) incorporating natural extracts from the microalgae Spirulina and Chlorella as photosensitizers. TiO2-based electrodes were prepared and immersed in methanolic algae extracts for 24 and...

  • Article
  • Open Access
2,872 Views
12 Pages

Development of Water-Based Inks with Bio-Based Pigments for Digital Textile Printing Using Valve-Jet Printhead Technology

  • Jéssica Antunes,
  • Marisa Lopes,
  • Beatriz Marques,
  • Augusta Silva,
  • Helena Vilaça and
  • Carla J. Silva

The textile industry is progressively shifting towards more sustainable solutions, particularly in the field of printing technologies. This study reports the development and evaluation of water-based pigment inks formulated with bio-based pigments de...

  • Article
  • Open Access
845 Views
17 Pages

Obtention of ZnO-Based Hybrid Pigments: Exploring Textile Dye Adsorption and Co-Adsorption with Copper Ion

  • Taiane L. Dlugoviet,
  • Andressa dos Santos,
  • Julia de Oliveira Primo and
  • Fauze Jacó Anaissi

Annually, more than 10,000 synthetic dyes are produced worldwide, generating around 280,000 tons of waste, posing risks to human and aquatic life, and potentially creating even more toxic products than the dyes themselves. This study aims to immobili...

  • Review
  • Open Access
2,530 Views
35 Pages

Recent advancements in phototherapy have underscored the need for effective cellular imaging agents that can enhance therapeutic efficacy and precision. Perylene diimide (PDI) dyes, known for their unique optical properties and biocompatibility, have...

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Colorants - ISSN 2079-6447