Antibacterial cotton fabrics with in situ generated silver and copper bimetallic nanoparticles using red sanders powder extract as reducing agent

Abstract The development of cellulose-based textiles that are functionalised with silver nanoparticles (AgNP), synthesised according to a green approach, and offer protection against ultraviolet (UV) radiation and pathogenic bacteria is very important today. In the present work we demonstrate the environmentally friendly approach to obtain such textile material by AgNP synthesis directly (in-situ) on cotton fabrics, using water extracts of plant food waste (green tea leaves, avocado seed and pomegranate peel) and alien invasive plants (Japanese knotweed rhizome, goldenrod flowers and staghorn sumac fruit) as reducing agents. The extracts were analysed for their total content of phenols and flavonoids and their antioxidant activity. The synthesised AgNP on cotton were round, of different size and amount depending on the reducing agent used. The highest amount of AgNP was found for samples where Japanese knotweed rhizome extract was used as reducing agent and the lowest where extracts of goldenrod flowers and green tea leaves were used. Regardless of the reducing agent used to form AgNP, all cotton samples showed excellent protection against E. coli and S. aureus bacteria and against UV radiation with UV protection factor values above 50. The best results for UV protection even after the twelve repetitive washing cycles were found for the sample functionalized with AgNP synthesised with an extract of the Japanese knotweed rhizome. Due to the presence of AgNP on cotton, the air permeability and thermal conductivity decreased. AgNP had no effect on the change in breaking strength or elongation of fabrics. Graphic abstract

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In Situ Generation of Bimetallic Nanoparticles in Cotton Fabric Using Aloe Vera Leaf Extract, as a Reducing Agent

Journal of Natural Fibers ◽

10.1080/15440478.2018.1558146 ◽

2018 ◽

Vol 17 (8) ◽

pp. 1121-1129 ◽

Cited By ~ 8

Author(s):

G. Mamatha ◽

A. Varada Rajulu ◽

K. Madhukar

Keyword(s):

Cotton Fabric ◽

Leaf Extract ◽

Bimetallic Nanoparticles ◽

Aloe Vera ◽

Reducing Agent ◽

In Situ Generation

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In Situ, One-Pot Method to Prepare Robust Superamphiphobic Cotton Fabrics for High Buoyancy and Good Antifouling

ACS Applied Materials & Interfaces ◽

10.1021/acsami.1c08844 ◽

2021 ◽

Author(s):

Xinting Han ◽

Xiao Gong

Keyword(s):

Cotton Fabrics ◽

One Pot

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A novel modification method via in-situ reduction of AuAg bimetallic nanoparticles by polydopamine on carbon fiber microelectrode for H2O2 detection

Microchemical Journal ◽

10.1016/j.microc.2020.104595 ◽

2020 ◽

Vol 154 ◽

pp. 104595 ◽

Cited By ~ 5

Author(s):

Wenqian Sun ◽

Xuan Cai ◽

Zhenxing Wang ◽

Hongli Zhao ◽

Minbo Lan

Keyword(s):

Carbon Fiber ◽

Bimetallic Nanoparticles ◽

In Situ Reduction ◽

Carbon Fiber Microelectrode ◽

H2o2 Detection ◽

Modification Method

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Poly(N-isopropylacrylamide-co-methacrylic acid) microgel stabilized copper nanoparticles for catalytic reduction of nitrobenzene

Materials Science-Poland ◽

10.1515/msp-2015-0074 ◽

2015 ◽

Vol 33 (3) ◽

pp. 627-634 ◽

Cited By ~ 14

Author(s):

Zahoor H. Farooqi ◽

Zonarah Butt ◽

Robina Begum ◽

Shanza Rhauf Khan ◽

Ahsan Sharif ◽

...

Keyword(s):

Copper Nanoparticles ◽

Methacrylic Acid ◽

Catalytic Reduction ◽

Aqueous Media ◽

Activation Parameters ◽

Reducing Agent ◽

Different Temperatures ◽

Entropy Of Activation ◽

Micro Reactors

Abstract Poly(N-isopropylacrylamide-co-methacrylic acid) microgels [p(NIPAM-co-MAAc)] were synthesized by precipitation polymerization of N-isopropylacrylamide and methacrylic acid in aqueous medium. These microgels were characterized by dynamic light scattering and Fourier transform infrared spectroscopy. These microgels were used as micro-reactors for in situ synthesis of copper nanoparticles using sodium borohydride (NaBH4) as reducing agent. The hybrid microgels were used as catalysts for the reduction of nitrobenzene in aqueous media. The reaction was performed with different concentrations of catalyst and reducing agent. A linear relationship was found between apparent rate constant (kapp) and amount of catalyst. When the amount of catalyst was increased from 0.13 to 0.76 mg/mL then kapp was increased from 0.03 to 0.14 min-1. Activation parameters were also determined by performing reaction at two different temperatures. The catalytic process has been discussed in terms of energy of activation, enthalpy of activation and entropy of activation. The synthesized particles were found to be stable even after 14 weeks and showed catalytic activity for the reduction of nitrobenzene.

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Ultra-Small Pd(0) Nanoparticles into a Designed Semisynthetic Lipase: An Efficient and Recyclable Heterogeneous Biohybrid Catalyst for the Heck Reaction under Mild Conditions

Molecules ◽

10.3390/molecules23092358 ◽

2018 ◽

Vol 23 (9) ◽

pp. 2358 ◽

Cited By ~ 7

Author(s):

David Lopez-Tejedor ◽

Blanca de las Rivas ◽

Jose M. Palomo

Keyword(s):

Catalytic Activity ◽

Protein Structure ◽

Heck Reaction ◽

Catalytic Performance ◽

Reducing Agent ◽

Chemically Modified ◽

Mild Conditions ◽

In Situ Formation ◽

Geobacillus Thermocatenulatus

A novel heterogeneous enzyme-palladium (Pd) (0) nanoparticles (PdNPs) bionanohybrid has been synthesized by an efficient, green, and straightforward methodology. A designed Geobacillus thermocatenulatus lipase (GTL) variant genetically and then chemically modified by the introduction of a tailor-made cysteine-containing complementary peptide- was used as the stabilizing and reducing agent for the in situ formation of ultra-small PdNPs nanoparticles embedded on the protein structure. This bionanohybrid was an excellent catalyst in the synthesis of trans-ethyl cinnamate by Heck reaction at 65 °C. It showed the best catalytic performance in dimethylformamide (DMF) containing 10–25% of water as a solvent but was also able to catalyze the reaction in pure DMF or with a higher amount of water as co-solvent. The recyclability and stability were excellent, maintaining more than 90% of catalytic activity after five cycles of use.

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A green in situ synthesis of silver nanoparticles on cotton fabrics using Aloe vera leaf extraction for durable ultraviolet protection and antibacterial activity

Textile Research Journal ◽

10.1177/0040517516671124 ◽

2016 ◽

Vol 87 (19) ◽

pp. 2407-2419 ◽

Cited By ~ 17

Author(s):

Qingqing Zhou ◽

Jingchun Lv ◽

Yu Ren ◽

Jiayi Chen ◽

Dawei Gao ◽

...

Keyword(s):

Silver Nanoparticles ◽

Antibacterial Activity ◽

Aloe Vera ◽

Cotton Fabrics ◽

In Situ Synthesis ◽

Uv Protection ◽

X Ray ◽

Jcpds File ◽

Laundering Durability

This study presented a simple and environmentally friendly method of in situ synthesis of silver nanoparticles (AgNPs) on cotton fabrics for durable ultraviolet (UV) protection and antibacterial activity using Aloe vera leaf extraction (AVE) as a reducing and stabilizing agent. Cotton fabrics were pretreated in water, and then immersed in AgNO3 and AVE, respectively. Cotton fabrics were characterized by small angle X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis, UV protection, antibacterial activity, and laundering durability. Comparing with the smooth surface of the control cotton fabric, SEM and energy dispersive X-ray spectrometry (EDX) results showed that there were a considerable number of Ag2O and AgNPs loading on the surface of the pretreated and Ag loaded cotton fabrics. The XRD pattern indicated, respectively, the existence of Ag2O and AgNPs, the structures of which were similar to JCPDS File No.65-3289 and JCPDS File No. 01-071-4613 on the pretreated and Ag loaded cotton fabrics. The pretreated and Ag loaded cotton fabrics showed excellent UV protection, antibacterial activity, and laundering durability, especially the Ag loaded cotton fabric, of which the UV protection factor value and transmission of UVA were 148 and 1.11%, respectively, after 20 washing cycles, and the clear zone width was more than 4 mm against E. coli or S. aureus. AgNPs facilitated the improvement of the thermal property of the cotton fabrics. Thus this facile in situ reduction of AgNPs with AVE may bring a promising and green strategy to produce functional textiles.

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In situ synthesis of Au–Pd bimetallic nanoparticles on amine-functionalized SiO2 for the aqueous-phase hydrodechlorination of chlorobenzene

RSC Advances ◽

10.1039/c4ra07122k ◽

2014 ◽

Vol 4 (89) ◽

pp. 48254-48259 ◽

Cited By ~ 12

Author(s):

Xinkui Wang ◽

Qinggang Liu ◽

Zihui Xiao ◽

Xiao Chen ◽

Chuan Shi ◽

...

Keyword(s):

Electronic Properties ◽

Aqueous Phase ◽

Reduction Method ◽

Bimetallic Nanoparticles ◽

In Situ Synthesis ◽

High Dispersion ◽

Amine Functionalized

The homogeneous Au–Pd NPs have been prepared through a facile in situ reduction method. The optimal AuPd1.0/SiO2 catalyst could complete the conversion of chlorobenzene due to the high dispersion and modified electronic properties of Pd.

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