scholarly journals Development and Biocompatibility Evaluation of Photocatalytic TiO2/Reduced Graphene Oxide-Based Nanoparticles Designed for Self-Cleaning Purposes

Nanomaterials ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 279 ◽  
Author(s):  
Ionela Nica ◽  
Miruna Stan ◽  
Marcela Popa ◽  
Mariana Chifiriuc ◽  
Gratiela Pircalabioru ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene ◽  
Self Cleaning ◽  
Photocatalytic Tio2

High performing smart hyperbranched polyurethane nanocomposites with efficient self-healing, self-cleaning and photocatalytic attributes

2018 ◽  
Vol 42 (3) ◽  
pp. 2167-2179 ◽  
Author(s):  
Rituparna Duarah ◽  
Niranjan Karak
Keyword(s):  
Energy Source ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Sustainable Energy ◽  
Self Healing ◽  
High Performing ◽  
Hyperbranched Polyurethane ◽  
Reduced Graphene ◽  
Self Cleaning ◽  
Polyurethane Nanocomposites

Tough smart starch modified hyperbranched polyurethane/reduced graphene oxide–silver–reduced carbon nanodot nanocomposites with self-healing and self-cleaning attributes under a sustainable energy source.

Reduced graphene oxide/TiO2 nanocomposites coating of cotton fabrics with antibacterial and self-cleaning properties

2018 ◽  
Vol 49 (3) ◽  
pp. 277-293 ◽  
Author(s):  
Miruna S Stan ◽  
Ionela C Nica ◽  
Marcela Popa ◽  
Mariana C Chifiriuc ◽  
Ovidiu Iordache ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Color Change ◽  
Water Repellency ◽  
Cotton Fabrics ◽  
Hydrothermal Conditions ◽  
Antimicrobial Efficiency ◽  
Reduced Graphene ◽  
Self Cleaning

Textile materials can be easily used as a support for the nano-decoration with active particles in order to gain new features such as self-cleaning, antimicrobial efficiency, water repellency, mechanical strength, color change and protection against ultraviolet radiations. In this context, our present research reports the fabrication and characterization (physico-chemical analysis and surface morphology) of cotton fabrics treated with reduced graphene oxide decorated with two types of TiO2 nanoparticles co-doped with 1% iron and nitrogen atoms (TiO2/rGO NPs) and synthesized in different hydrothermal conditions by a simultaneous precipitation of Ti3+ and Fe3+ ions to achieve their uniform distribution or after a sequential precipitation of these two cations for obtaining a higher concentration of iron on the surface of Ti4+ oxyhydroxide. Further, the antimicrobial efficiency of these TiO2/rGO-treated textiles and their influence on human cells were assessed. We demonstrated the successful development of TiO2/rGO coating of cotton fabrics which are harmless for human skin cells and inhibit the growth of Staphylococcus aureus and Enterococcus faecalis. These findings confirm their great potential as novel graphene-based materials for biomedical and photocatalytic applications and this approach could be used for the large-scale fabrication of innovative self-cleaning and antimicrobial textiles.

Robust self-cleaning effects of cotton fabrics coated with reduced graphene oxide (RGO)-titanium dioxide (TiO2) nanocomposites

2021 ◽  
pp. 004051752110265
Author(s):  
Wenjun Li ◽  
Hui Zhang ◽  
Tianyu Chen ◽  
Limeng Yang ◽  
Cuihong Sheng ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Electron Microscope ◽  
Reduced Graphene Oxide ◽  
Cotton Fabrics ◽  
The Self ◽  
Graphene Oxide Nanosheets ◽  
X Ray ◽  
Reduced Graphene ◽  
Self Cleaning

The self-cleaning textiles coated with reduced graphene oxide-titanium dioxide (TiO2) nanocomposites have enhanced photocatalytic activities and could have great potential in practical applications. However, it is still problematic regarding how to avoid aggregation of reduced graphene oxide nanosheets in producing reduced graphene oxide-TiO2 nanocomposites. In this research article, we propose a new method to reduce the aggregation of reduced graphene oxide nanosheets in producing cotton fabrics coated with reduced graphene oxide-TiO2 nanocomposites by combining vibration-assisted ball milling and hydrothermal synthesis process. The microstructure and photocatalytic-related properties of the resultant reduced graphene oxide-TiO2 nanocomposites and their coating cotton fabrics were characterized by using a series of techniques including field emission scanning electron microscope (FESEM), atomic force microscope (AFM), X-ray diffraction spectroscopy (XRD), Raman, particle size distribution, Brunauer-Emmett-Teller,(BET), transmission electron microscope (TEM), X-ray photoelectron spectrometer (XPS), diffuse reflectance spectra (DRS), ultraviolet photoelectron spectroscope (UPS), and photoluminescence (PL). It was indicated that the aggregation of reduced graphene oxide nanosheets in reduced graphene oxide-TiO2 nanocomposites was successfully avoided via ball milling in the presence of tetrabutyl titanate. After hydrothermal treatment, the resulting reduced graphene oxide-TiO2 nanocomposites were firmly immobilized on cotton fabric. It was demonstrated in the self-cleaning experiments that the resultant self-cleaning cotton fabrics are hydrophilic and could directly decompose color contaminants such as methylene blue, Congo red, and coffee stains under simulated sunlight irradiation due to the photo-degradation reactions of the reduced graphene oxide-TiO2 nanocomposite coating. The reduced graphene oxide-TiO2 nanocomposite-modified cotton fabric also exhibited excellent performance in both robust abrasion resistance and soap-washing resistance. The fabric photocatalytic self-cleaning capability was not found to decrease significantly after being repeatedly used for five times.

Tuning of sunlight-induced self-cleaning and self-healing attributes of an elastomeric nanocomposite by judicious compositional variation of the TiO2–reduced graphene oxide nanohybrid

2015 ◽  
Vol 3 (23) ◽  
pp. 12334-12342 ◽  
Author(s):  
Suman Thakur ◽  
Niranjan Karak
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Compositional Variation ◽  
Self Healing ◽  
Hyperbranched Polyurethane ◽  
Reduced Graphene ◽  
Self Cleaning

A sunlight induced self-cleaning and healable tough elastomeric hyperbranched polyurethane/TiO2–reduced graphene oxide nanocomposite is fabricated by an in situ polymerization technique.

scholarly journals On the Role of γ-Fe2O3 Nanoparticles and Reduced Graphene Oxide Nanosheets in Enhancing Self-Cleaning Properties of Composite TiO2 for Cultural Heritage Protection

Coatings ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 933
Author(s):  
Maryam Mokhtarifar ◽  
Reyhaneh Kaveh ◽  
Marco Ormellese ◽  
Mojtaba Bagherzadeh ◽  
Maria Vittoria Diamanti ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Acid Rain ◽  
Reduced Graphene Oxide ◽  
Crack Density ◽  
Hydroxyl Groups ◽  
Fe2o3 Nanoparticles ◽  
Tio2 Anatase ◽  
Reduced Graphene ◽  
Self Cleaning

The durability of novel metallic artifacts and buildings is an open issue, and the role of smart protecting coatings in extending these artifacts’ lifetimes is crucial. In this paper, the role of γ-Fe2O3 nanoparticles and reduced graphene oxide (rGO) nanosheets on enhancing the self-cleaning properties of composite TiO2 films and reducing metal alterations due to contact with acid rain and pollutants is investigated. The photocatalytic assessment of the TiO2 based films indicates that there are optimum contents for γ-Fe2O3 and rGO, which confer the film lower bandgap and tune the TiO2 anatase/rutile ratio. By adding a proper content of γ-Fe2O3, wettability is reduced both in dark and under illumination, which could be related to higher roughness. γ-Fe2O3 overloading causes increasing crack density and eventually a fully cracked structure. Adding an appropriate amount of rGO causes a sharp increase in roughness, due to the stacking of rGO nanosheets, while simultaneously avoiding cracking. At higher contents of rGO, wettability further decreases due to higher amounts of hydroxyl groups bound onto rGO; also in this case, overloading causes film cracking. Evaluation of self-cleaning performance and discoloration resistance under soiling and acid rain simulated tests demonstrates that proper loadings of γ-Fe2O3 and rGO present higher efficiency thanks to higher superhydrophilic tendency and higher photocatalytic activities, as well as an efficient barrier effect.

Sign in / Sign up

Export Citation Format

Share Document