Hybrid materials based on azopolymer and sol–gel synthesized silver-containing titanium oxide nanoparticles with photoinduced birefringence

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15740-15748 ◽  
Author(s):  
Raquel Fernández ◽  
Junkal Gutierrez ◽  
Arantxa Eceiza ◽  
Agnieszka Tercjak
Keyword(s):  
Titanium Oxide ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Nanocomposite Films ◽  
Oxide Nanoparticles ◽  
Titanium Oxide Nanoparticles ◽  
Photoinduced Birefringence

A strategy for the development of novel nanocomposite films based on azopolymer and sol–gel synthesized silver-containing titanium oxide nanoparticles with different photoinduced birefringent properties is reported.

scholarly journals Production of biodegradable sodium caseinate film containing titanium oxide nanoparticles and grape seed essence and investigation of physicochemical properties

2021 ◽  
Author(s):  
Roghiye Ashrafi Yorghanlu ◽  
Haleh Hemmati ◽  
Sajad Pirsa ◽  
Arezu Makhani
Keyword(s):  
Mechanical Properties ◽  
Water Vapor ◽  
Titanium Oxide ◽  
Antioxidant Properties ◽  
Sodium Caseinate ◽  
Grape Seed ◽  
Nanocomposite Films ◽  
Oxide Nanoparticles ◽  
Titanium Oxide Nanoparticles ◽  
Positive Effects

Abstract In this study sodium caseinate film was produced and the effect of titanium oxide nanoparticles and grape seed essence as factors that enhances film properties was investigated. For this purpose, nanocomposite films based on sodium caseinate were modified with different levels of nanoparticles of 0 to 1.5 % and grape seed essence at levels of 0 to 500 ppm based on the central composite experimental design (CCD). The effects of these variables on physical/mechanical properties, water vapor permeability and antioxidant properties were investigated. The morphology and chemical structure of different films were evaluated by SEM and FTIR techniques. The results showed that the addition of titanium oxide nanoparticles has improved the mechanical properties of the films. In this regard, films prepared from 1.5% and 500 ppm nanoparticles have the highest tensile strength. The results of scanning electron microscopy test showed that the addition of nanoparticles led to the indirect penetration of water, which reduced the permeability of the films to water vapor to 4.89 kg/m. The addition of grape seed essence caused the antioxidant effects of the produced films, so that the films containing 250 ppm showed antioxidant activity of 86.74%. Overall, the results showed that the addition of nanoparticles and grape seed essence had positive effects on the physical and chemical properties of sodium caseinate.

Superacid-Catalyzed Preparation of Highly Dispersible Zirconium Oxide and Titanium Oxide Nanoparticles Without Hydrocarbon Units

2020 ◽  
Vol 20 (5) ◽  
pp. 2755-2762 ◽  
Author(s):  
Taishi Nakahara ◽  
Yoshiro Kaneko
Keyword(s):  
Titanium Oxide ◽  
Zirconium Oxide ◽  
Sol Gel ◽  
Oxide Nanoparticles ◽  
Average Particle ◽  
Acid Catalysts ◽  
Particle Sizes ◽  
Mixed Solution ◽  
Titanium Oxide Nanoparticles ◽  
Trifluoromethyl Groups

Highly dispersible, hydrocarbon-free zirconium oxide and titanium oxide nanoparticles (ZrO2–NTf2– NP and TiO2–NTf2–NP) were successfully prepared via the simple sol–gel reactions of zirconium tetra-n-butoxide and titanium tetra-n-butoxide, respectively, using a water/methanol mixed solution of the bis(trifluoromethanesulfonyl)imide superacid. ZrO2–NTf2–NP could be dispersed in acetone, ethanol, methanol, N,N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), and water, whereas TiO2–NTf2–NP could be dispersed in acetone, DMF, DMSO, and water. The number-average particle sizes of ZrO2–NTf2–NP and TiO2–NTf2–NP were determined to be 3.6±0.6 nm and 5.8±1.1 nm; these values were obtained by dynamic light-scattering measurements of the acetone dispersions (1.0 w/v%). Highly dispersible ZrO2 nanoparticles could be prepared using other acid catalysts containing trifluoromethyl groups, such as trifluoromethanesulfonic acid and trifluoroacetic acid. In contrast, dispersible TiO2 nanoparticles could not be prepared using these acid catalysts.

Copper and sulphur co-doped titanium oxide nanoparticles with enhanced catalytic and photocatalytic properties

2020 ◽  
Vol 10 (19) ◽  
pp. 6511-6524
Author(s):  
Josefa Ortiz-Bustos ◽  
Santiago Gómez-Ruiz ◽  
Jaime Mazarío ◽  
Marcelo E. Domine ◽  
Isabel del Hierro ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Sol Gel ◽  
Photocatalytic Properties ◽  
Oxide Nanoparticles ◽  
Titanium Oxide Nanoparticles ◽  
Gel Method ◽  
Sol Gel Method ◽  
Co Doped

Copper and sulphur co-doped titanium oxide nanoparticles have been prepared by the sol–gel method to develop versatile catalysts exhibiting enhanced catalytic and photocatalytic properties.

Titanium Oxide Nanoparticles Improve the Chemotherapeutic Action of Erlotinib in Liver Cancer Cells

2020 ◽  
Vol 16 (4) ◽  
pp. 337-343
Author(s):  
Shaimaa E. Abdel-Ghany ◽  
Eman El-Sayed ◽  
Nour Ashraf ◽  
Nada Mokhtar ◽  
Amany Alqosaibi ◽  
...  
Keyword(s):  
Liver Cancer ◽  
Cancer Cells ◽  
Titanium Oxide ◽  
Phase Distribution ◽  
Oxide Nanoparticles ◽  
Titanium Oxide Nanoparticles ◽  
Liver Cancer Cells ◽  
M Phase ◽  
Apoptosis Detection ◽  
Novel Method

Background: Hepatocellular carcinoma is the second leading cause of cancer-related deaths among other types of cancer due to lack of effective treatments and late diagnosis. Nanocarriers represent a novel method to deliver chemotherapeutic drugs, enhancing their bioavailability and stability. Methods: In the present study, we loaded gold nanoparticles (AuNPs) and titanium oxide nanoparticles (TiO2NPs) with ERL to investigate the efficiency of the formed composite in inducing apoptosis in HepG2 liver cancer cells. Cytotoxicity was assessed using MTT assay and cell phase distribution was assessed by flow cytometry along with apoptosis detection. Results: Data obtained indicated the efficiency of the formed composite to significantly induce cell death and arrest cell cycle and G2/M phase. IRF4 was downregulated after treatment with loaded ERL. Conclusion: Our data showed that loading ERL on TiO2NPs was more efficient than AuNPs. However, both nanocarriers were efficient compared with control.

Synthesis of polymorphic titanium oxide nanoparticles by a rapid gas-phase chemical reaction

2016 ◽  
Vol 26 (2) ◽  
pp. 157-159 ◽  
Author(s):  
Ning Luo ◽  
Hong Wen Jing ◽  
Zhan Guo Ma ◽  
Weidong Liu ◽  
Liangchi Zhang ◽  
...  
Keyword(s):  
Gas Phase ◽  
Titanium Oxide ◽  
Chemical Reaction ◽  
Oxide Nanoparticles ◽  
Titanium Oxide Nanoparticles ◽  
Phase Chemical
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