Natural Dyes—A Way Forward

Panda, Akankshya; Maiti, Saptarshi; Madiwale, Pallavi; Adivarekar, Ravindra V.

doi:10.1002/9781119905332.ch16

Cited by 5 publications

(3 citation statements)

References 47 publications

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“…Natural dyes are typically derived from herbal plant sources (root, stem, leaves, bark, and flowers), as well as from minerals and animal sources [56]. In addition, synthetic dyes can be divided into three groups: anionic dyes (which are water-soluble, and include acid, direct, and reactive dyes), cationic dyes (basic dyes), and nonionic dyes (dispersing, pigment, and solvent dyes) are shown in Figure 3 [57]. Most of cationic dyes are hazardous, including both humans and aquatic ecosystems, making them more poisonous than anionic dyes [58].…”

Section: Classification Of Dyesmentioning

confidence: 99%

A review of new developments in the synthesis of CuO nanoparticles via plant extracts for enhancing the photocatalytic activity

Thakur,

Kumar,

Thakur

et al. 2022

Biomat Polymers Horizon

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Metal and metal oxide nanoparticles are used widely in a variety of fields of science, research organizations, and industry sectors due to recent advancements in nanoscience and nanotechnologies. Due to their exclusive its unique characteristics and uses, copper oxide nanoparticles (CuO NPs) have drawn more attention than further other metal oxides. The expensive components reagents, equipment, and environmental hazards and risks connected to the physical and chemical processes of CuO NPs synthesis have been a major cause for concern. This review main features of a collection of thorough data from the latest advancements in the synthesis, characterization, and applications from prior research studies on the biological method of synthesizing CuO NPs in the sample order to puffer a solution to the given aforementioned techniques by aiming to reduce reducing environmental pollution and producing inexpensive cheaper nanoparticles with effective characteristics. CuO NPs demonstrated astounding photocatalytic efficiency against the degradation of industrial waste dye. For the photocatalytic destruction of organic contaminants, CuO NPs have high prospective applications. This review study provides additional information on the use of CuO photocatalysts, which are low-cost and environmentally acceptable, to efficiently remove hazardous colors from industrial wastewater. This investigation also provides useful and informative knowledge on the instant synthesis of CuO NPs from plant extracts with desired properties.

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Section: Classification Of Dyesmentioning

confidence: 99%

A review of new developments in the synthesis of CuO nanoparticles via plant extracts for enhancing the photocatalytic activity

Thakur,

Kumar,

Thakur

et al. 2022

Biomat Polymers Horizon

View full text Add to dashboard Cite

show abstract

“…Generally, animal and plant cell walls are a high source of natural colors, but they are highly sensitive to hot water because the processing of color extraction at high temperatures breaks down some of the groups that restrict the process and demands cost-effective, sustainable methods. [20][21][22][23][24][25][26] Ultrasonic-assisted extraction (UAE) [27][28][29][30][31][32][33] is an innovative technology that has gained prominence in color extraction and dyeing in different fields like food, textiles, etc. It involves using ultrasound waves into the mixture of solvent and item to be extracted at a low temperature to enhance extraction processes by breaking down cell structures and facilitating the release of color, but not allowing any hydrolysis of the colorant, as well as reducing the scope of color fading during fabric dyeing as required at a low temperature in the process.…”

Section: Introductionmentioning

confidence: 99%

“…investigated the dyeing properties of mohair fiber using natural dyes derived from Candelariella reflexa . Generally, animal and plant cell walls are a high source of natural colors, but they are highly sensitive to hot water because the processing of color extraction at high temperatures breaks down some of the groups that restrict the process and demands cost‐effective, sustainable methods [20–26] …”

Section: Introductionmentioning

confidence: 99%

Exploring Ultrasonic‐Assisted Extraction and Eco‐Friendly Dyeing of Organic Cotton using Syzygium cumini Leaf Extracts

Akram,

Uddin Banna,

Mahmud

et al. 2024

ChemistrySelect

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The demand for natural dyes is increasing due to the negative environmental impacts of synthetic color. In fact, customers are becoming more concerned about their health and the environmentally friendly products. The aim of this research is to disclose the dye extraction process using the ultrasonic method and eco‐friendly dyeing of organic cotton knitted fabric. Initially, 10 g of Syzyguim cumini leaf powder was dissolved in 150 mL of purified water maintaining a 1 : 15 M : L ratio to extract the color. After that, the extracted dye solution was added to coloration bath following the M : L ratios of 1 : 16, 1 : 12, and 1 : 8 for producing dark, medium, and light shades, respectively. Post mordanting was done using natural lemon juice for colorfastness improvement. The color attributes were revealed by the spectrophotometric analysis. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to comprehend the successful relationship that exists among SCL dyes and organic cotton fibers, and the TGA analysis confirmed that dyed fabric is more stable than undyed fabric. Moreover, the colored sample‘s pH, formaldehyde level, and presence of forbidden Azo groups (aromatic amines) were examined. The test results revealed that very good to excellent color fastness properties were obtained and no harmful chemicals were detected in the dyed samples.

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Anar Phali (Opuntia ficus) juice extract as a novel pollution-free source of natural betalain dye for wool yarn

Riaz,

Barkaat,

Adeel

et al. 2023

Environ Sci Pollut Res

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Natural Dyes—A Way Forward

Cited by 5 publications

References 47 publications

A review of new developments in the synthesis of CuO nanoparticles via plant extracts for enhancing the photocatalytic activity

A review of new developments in the synthesis of CuO nanoparticles via plant extracts for enhancing the photocatalytic activity

Exploring Ultrasonic‐Assisted Extraction and Eco‐Friendly Dyeing of Organic Cotton using Syzygium cumini Leaf Extracts

Anar Phali (Opuntia ficus) juice extract as a novel pollution-free source of natural betalain dye for wool yarn

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