Synthesis and SERS application of gold and iron oxide functionalized bacterial cellulose nanocrystals (Au@Fe3O4@BCNCs)

Bacterial cellulose nanocrystals (BCNCs) are biocompatible cellulose nanomaterials that can host guest nanoparticles to form hybrid nanocomposites with a wide range of applications.

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Green Synthesis of ZnO/Dy/NiO Heterostructures for Enhanced Photocatalytic Applications

Journal of Photocatalysis ◽

10.2174/2665976x01666200214125616 ◽

2020 ◽

Vol 1 (1) ◽

pp. 30-36

Author(s):

Shubha Jayachamarajapura Pranesh ◽

Diwya Lanka

Keyword(s):

Visible Light ◽

Uv Light ◽

Combustion Method ◽

Hybrid Nanocomposites ◽

Synthetic Dyes ◽

Hybrid Nanostructure ◽

Wide Range ◽

Visible Light Active ◽

Textile Industries ◽

Photocatalytic Applications

Background: Textile industries discharge harmful synthetic dyes to nearby water sources. These colour effluents should be treated before discharge to reduce the toxicity caused by synthetic colours. Objective: To synthesize visible light active superstructures to reduce water pollution caused by textile industries. Methods: We have successfully synthesized ZnO/Dy/NiO hybrid nanocomposites using waste curd as fuel by a simple combustion method. The obtained material was able to reduce recombination and enhanced the photocatalytic degradation of organic pollutants. The as-synthesized material was characterized by XRD, absorption spectroscopy, FESEM, EDAX, etc. The obtained hybrid nanostructure was used as a photocatalyst for the degradation of methylene blue under sunlight, UV light as well as in dark. Comparative experiments were carried out with a variation of catalytic load, pH, dye concentrations, etc. for a better understanding of the performance of the catalyst at various conditions. Results and Conclusion: The ternary compound shows wide range of absorption by expanding absorption band both in UV and visible regions. ZnO/Dy/NiO hybrid nanocomposites performed well and showed uniqueness in the activity uder visible light.

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Characterizing Bacterial Cellulose Produced byKomagataeibacter sucrofermentans H-110 on Molasses Medium and Obtaining a Biocomposite Based on It for the Adsorption of Fluoride

Polymers ◽

10.3390/polym13091422 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1422

Author(s):

Viktor V. Revin ◽

Alexander V. Dolganov ◽

Elena V. Liyaskina ◽

Natalia B. Nazarova ◽

Anastasia V. Balandina ◽

...

Keyword(s):

Composite Material ◽

Adsorption Capacity ◽

Bacterial Cellulose ◽

Functional Materials ◽

Degree Of Crystallinity ◽

Maximum Adsorption Capacity ◽

Fluoride Ions ◽

Sorption Ability ◽

Wide Range ◽

Biocomposite Material

Currently, there is an increased demand for biodegradable materials in society due to growing environmental problems. Special attention is paid to bacterial cellulose, which, due to its unique properties, has great prospects for obtaining functional materials for a wide range of applications, including adsorbents. In this regard, the aim of this study was to obtain a biocomposite material with adsorption properties in relation to fluoride ions based on bacterial cellulose using a highly productive strain of Komagataeibacter sucrofermentans H-110 on molasses medium. Films of bacterial cellulose were obtained. Their structure and properties were investigated by FTIR spectroscopy, NMR, atomic force microscopy, scanning electron microscopy, and X-ray structural analysis. The results show that the fiber thickness of the bacterial cellulose formed by the K. sucrofermentans H-110 strain on molasses medium was 60–90 nm. The degree of crystallinity of bacterial cellulose formed on the medium was higher than on standard Hestrin and Schramm medium and amounted to 83.02%. A new biocomposite material was obtained based on bacterial cellulose chemically immobilized on its surface using atomic-layer deposition of nanosized aluminum oxide films. The composite material has high sorption ability to remove fluoride ions from an aqueous medium. The maximum adsorption capacity of the composite is 80.1 mg/g (F/composite). The obtained composite material has the highest adsorption capacity of fluoride from water in comparison with other sorbents. The results prove the potential of bacterial cellulose-based biocomposites as highly effective sorbents for fluoride.

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Effect of cross-linkable bacterial cellulose nanocrystals on the physicochemical properties of silk sericin films

Polymer Testing ◽

10.1016/j.polymertesting.2021.107161 ◽

2021 ◽

Vol 97 ◽

pp. 107161

Author(s):

Jeongmin Nam ◽

Yujin Hyun ◽

Subin Oh ◽

Jinseok Park ◽

Hyoung-Joon Jin ◽

...

Keyword(s):

Physicochemical Properties ◽

Bacterial Cellulose ◽

Cellulose Nanocrystals ◽

Silk Sericin

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Anodic Titanium Dioxide Nanotubes for Magnetically Guided Therapeutic Delivery

Scientific Reports ◽

10.1038/s41598-019-49513-2 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 6

Author(s):

Morteza Hasanzadeh Kafshgari ◽

Delf Kah ◽

Anca Mazare ◽

Nhat Truong Nguyen ◽

Monica Distaso ◽

...

Keyword(s):

Titanium Dioxide ◽

Iron Oxide ◽

Iron Oxide Nanoparticles ◽

Hela Cells ◽

Release Kinetics ◽

Drug Loading ◽

Oxide Nanoparticles ◽

Site Specific ◽

Therapeutic Drugs ◽

Wide Range

Abstract Hollow titanium dioxide (TiO2) nanotubes offer substantially higher drug loading capacity and slower drug release kinetics compared to solid drug nanocarriers of comparable size. In this report, we load TiO2 nanotubes with iron oxide nanoparticles to facilitate site-specific magnetic guidance and drug delivery. We generate magnetic TiO2 nanotubes (TiO2NTs) by incorporating a ferrofluid containing Ø ≈ 10 nm iron oxide nanoparticles in planar sheets of weakly connected TiO2 nanotubes. After thermal annealing, the magnetic tubular arrays are loaded with therapeutic drugs and then sonicated to separate the nanotubes. We demonstrate that magnetic TiO2NTs are non-toxic for HeLa cells at therapeutic concentrations (≤200 µg/mL). Adhesion and endocytosis of magnetic nanotubes to a layer of HeLa cells are increased in the presence of a magnetic gradient field. As a proof-of-concept, we load the nanotubes with the topoisomerase inhibitor camptothecin and achieve a 90% killing efficiency. We also load the nanotubes with oligonucleotides for cell transfection and achieve 100% cellular uptake efficiency. Our results demonstrate the potential of magnetic TiO2NTs for a wide range of biomedical applications, including site-specific delivery of therapeutic drugs.

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Augmented properties of PVA hybrid nanocomposites containing cellulose nanocrystals and silver nanoparticles

Journal of Materials Chemistry ◽

10.1039/c2jm35235d ◽

2012 ◽

Vol 22 (42) ◽

pp. 22433 ◽

Cited By ~ 45

Author(s):

Johnsy George ◽

Vallayil Appukuttan Sajeevkumar ◽

Karna Venkata Ramana ◽

Shanmugam Nadana Sabapathy ◽

Siddaramaiah

Keyword(s):

Silver Nanoparticles ◽

Cellulose Nanocrystals ◽

Hybrid Nanocomposites

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Green Synthesis of Magnetic Iron Oxide Nanoparticle for Antibacterial Activity: A Review

Biological Sciences - PJSIR ◽

10.52763/pjsir.biol.sci.64.2.2021.202.210 ◽

2021 ◽

Vol 64 (2) ◽

pp. 202-210

Author(s):

Muhammad Isa Khan ◽

Aliza Zahoor ◽

Tahir Iqbal ◽

Abdul Majid ◽

Mohsin Ijaz

Keyword(s):

Iron Oxide ◽

Green Synthesis ◽

Biomedical Applications ◽

Synthesis Method ◽

Antibacterial Activities ◽

Magnetic Characteristics ◽

Iron Oxide Nanoparticle ◽

The Past ◽

Wide Range ◽

Oxide Nanoparticle

Recently, different researchers find nanoparticles as an auspicious alternative to antibacterial agents due to their antibacterial behaviour. This antibacterial behaviour contributes in many biomedical applications including; tissue engineering, drug and gene delivery and, imaging. Furthermore, iron oxide nanoparticle gains much importance due to their magnetic characteristics and wide range of application. Iron oxide nanoparticle (IONPs) have exhibits great potential against bacteria. During the past decade, various routes were developed to synthesize iron oxide nanoparticle with suitable size and composition. This article reviews the recent iron oxide nanoparticle obtained by green synthesis with a focus on their response to antibacterial activities. The iron nanoparticles synthesized by green synthesis method has accumulated a vital attention over the last couple of years due to their unique characteristic as it makes sure environmental friendly, nontoxic and safe reagents.

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