Chitosan Beads Incorporated with Graphene Oxide/Titanium Dioxide Nanoparticles for Removing an Anionic Dye

2021 ◽  
Vol 11 (20) ◽  
pp. 9439
Author(s):  
Moisés A. Solano ◽  
Johanna Galan ◽  
William Vallejo ◽  
Victoria A. Arana ◽  
Carlos David Grande-Tovar
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
High Efficiency ◽  
Titanium Dioxide Nanoparticles ◽  
Diffusion Mechanism ◽  
Industrial Effluents ◽  
Chitosan Beads ◽  
Anionic Dye ◽  
Low Costs ◽  
Central Composite

Dyes present in industrial effluents have been treated by many methods, among which adsorption stands out for its high efficiency, low costs, simple operation processes, and the absence of hazardous byproducts. In this research, two adsorbents were obtained from chitosan beads (CS) cross-linked with glutaraldehyde (GLA), graphene oxide (GO), and titanium dioxide nanoparticles (TiO2) for the adsorption of the anionic dye FD&C Red 40 used as a model pollutant. The optimum removal conditions of FD&C Red 40 dye using CS-TiO2-GLA beads were determined (pH = 1.73, TiO2 amount =279.77 mg, and initial dye concentration = 55.23 mg L−1) with a central composite design with surface response methodology (RSM). The effect of the graphene oxide (GO) in the adsorption properties of CS-TiO2-GLA beads was evaluated, showing a considerable improvement in the removal efficiency of the model dye. The intraparticle diffusion mechanism best described the adsorption kinetics for the two adsorbents. This research demonstrates the potential of chitosan beads incorporated with graphene oxide and titanium dioxide nanoparticles to remove anionic contaminants from wastewater.

scholarly journals Nanocomposites of Chitosan/Graphene Oxide/Titanium Dioxide Nanoparticles/Blackberry Waste Extract as Potential Bone Substitutes

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3877
Author(s):  
Carlos Humberto Valencia-Llano ◽  
Moisés A. Solano ◽  
Carlos David Grande-Tovar
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
New Technologies ◽  
Bone Structure ◽  
Bone Cells ◽  
Critical Size ◽  
Titanium Dioxide Nanoparticles ◽  
Bone Substitutes ◽  
Critical Size Defect ◽  
Waste Extract

New technologies based on nanocomposites of biopolymers and nanoparticles inspired by the nature of bone structure have accelerated their application in regenerative medicine, thanks to the introduction of reinforcing properties. Our research incorporated chitosan (CS) covalently crosslinked with glutaraldehyde (GLA) beads with graphene oxide (GO) nanosheets, titanium dioxide nanoparticles (TiO2), and blackberry processing waste extract (BBE) and evaluated them as partial bone substitutes. Skullbone defects in biomodels filled with the scaffolds showed evidence through light microscopy, scanning electron microscopy, histological studies, soft tissue development with hair recovery, and absence of necrotic areas or aggressive infectious response of the immune system after 90 days of implantation. More interestingly, newly formed bone was evidenced by elemental analysis and Masson trichromacy analysis, which demonstrated a possible osteoinductive effect from the beads using the critical size defect experimental design in the biomodels. The results of this research are auspicious for the development of bone substitutes and evidence that the technologies for tissue regeneration, including chitosan nanocomposites, are beneficial for the adhesion and proliferation of bone cells.

scholarly journals Graphene oxide decorated with zinc oxide nanoflower, silver and titanium dioxide nanoparticles: fabrication, characterization, DNA interaction, and antibacterial activity

RSC Advances ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 3704-3714 ◽  
Author(s):  
Nagi El-Shafai ◽  
Mohamed E. El-Khouly ◽  
Maged El-Kemary ◽  
Mohamed Ramadan ◽  
Ibrahim Eldesoukey ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Titanium Dioxide Nanoparticles ◽  
Dna Interaction

The fabrication, characterization, and antibacterial activity of novel nanocomposites based on graphene oxide (GO) nanosheets decorated with silver, titanium dioxide nanoparticles, and zinc oxide nanoflowers were examined.

The Development of Photocatalytic Systems Entitled Titanium Dioxide Nanoparticles Attached to Polypropylene Fibrous Carrier for Freshwater Disinfection

2014 ◽  
Vol 1040 ◽  
pp. 183-187 ◽  
Author(s):  
Ilia A. Lysak ◽  
Galina V. Lysak ◽  
Tatyana D. Malinovskaya ◽  
Anatoly S. Ruhov
Keyword(s):  
Titanium Dioxide ◽  
Active Component ◽  
Microbial Contamination ◽  
High Efficiency ◽  
Titanium Dioxide Nanoparticles ◽  
Antibacterial Treatment ◽  
Bactericidal Properties ◽  
Current Article ◽  
Composition Structure ◽  
The Relationship

In the current article the use of nanoparticles of titanium dioxide is justified to be an active component of the photocatalytic materials. The relationship between composition, structure and bactericidal properties of titanium dioxide is also established. It is shown that the polypropylene carrier comprising on a surface of at least 2.1 ± 0.3 mg/g of titanium dioxide nanoparticles, where both phases of titanium dioxide such as rutile and anatase are presented, allows the antibacterial treatment of water with high efficiency and it can be used for water purification from microbial contamination.

Co-transport of graphene oxide and titanium dioxide nanoparticles in saturated quartz sand: Influences of solution pH and metal ions

2019 ◽  
Vol 251 ◽  
pp. 723-730 ◽  
Author(s):  
Tianjiao Xia ◽  
Yixuan Lin ◽  
Xuetao Guo ◽  
Shunli Li ◽  
Jingshan Cui ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Quartz Sand ◽  
Titanium Dioxide Nanoparticles ◽  
Solution Ph

scholarly journals Quantum dot-modified titanium dioxide nanoparticles as an energy-band tunable electron-transporting layer for open air-fabricated planar perovskite solar cells

2020 ◽  
Vol 10 ◽  
pp. 184798042096163
Author(s):  
Kanyanee Sanglee ◽  
Surawut Chuangchote ◽  
Taweewat Krajangsang ◽  
Jaran Sritharathikhun ◽  
Kobsak Sriprapha ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Energy Band ◽  
High Efficiency ◽  
Titanium Dioxide Nanoparticles ◽  
Perovskite Solar Cells ◽  
Ambient Air ◽  
Electron Transporting Layer ◽  
Efficient Charge ◽  
Band Adjustment

Perovskite solar cells have been attracted as new representatives for the third-generation photovoltaic devices. Simple strategies for high efficiency with the long-term stability of solar cells are the challenges for commercial solar cell technology. Another challenge of the development toward industrial scale in perovskite solar cells is the production under the ambient and high humidity. In this sense, we successfully fabricated perovskite solar cells via solution depositions of all layers under ambient air with a relative humidity above 50%. Titanium dioxide (TiO2) nanoparticles with the roles for efficient charge extraction and electron transportation properties were used as an electron-transporting layer in the cell fabrication. The modification of TiO2 nanoparticles for energy band adjustment was done by doping with nontoxic cadmium sulfide (CdS) quantum dots. With the variation of CdS concentrations, energy band is not only changeable, but the enhancement of the perovskite solar cells efficiency could be achieved compared with the conventional cells made of pristine-TiO2 film and TiO2 nanoparticles.

Development of sonophotocatalytic process for degradation of acid orange 7 dye by using titanium dioxide nanoparticles/graphene oxide nanocomposite as a catalyst

2021 ◽  
Vol 292 ◽  
pp. 112777
Author(s):  
Tariq J. Al-Musawi ◽  
Periakaruppan Rajiv ◽  
Nezamaddin Mengelizadeh ◽  
Ibrahim A. Mohammed ◽  
Davoud Balarak
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Titanium Dioxide Nanoparticles ◽  
Acid Orange 7 ◽  
Acid Orange
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