Preparation, characterization and photocatalytic degradation properties of a TiO<sub>2</sub>/calcium alginate composite film and the recovery of TiO<sub>2</sub>nanoparticles

Zhao, Kongyin; Feng, Lingzhi; Li, Zhihui; Fu, Yifan; Zhang, Xinxin; Wei, Junfu; Wei, Shuxin

doi:10.1039/c4ra08102a

Cited by 51 publications

(11 citation statements)

References 31 publications

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“…Zhao et al studied the compatibility between calcium alginate and TiO 2 using Fourier transform infrared spectrometry. They reported that TiO 2 particles had good compatibility with calcium alginate, because there were many hydroxyl groups on the surface of TiO 2 , which formed hydrogen bonds with the hydroxyl groups in the alginate hydrogel [37]. Das et al proposed a mechanism to explain the attachment of TCP ceramic particles in the alginate network.…”

Section: Resultsmentioning

confidence: 99%

Alginate/Gelatin Hydrogels Reinforced with TiO2 and β-TCP Fabricated by Microextrusion-based Printing for Tissue Regeneration

et al. 2019

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Three-dimensional (3D) printing technologies have become an attractive manufacturing process to fabricate scaffolds in tissue engineering. Recent research has focused on the fabrication of alginate complex shaped structures that closely mimic biological organs or tissues. Alginates can be effectively manufactured into porous three-dimensional networks for tissue engineering applications. However, the structure, mechanical properties, and shape fidelity of 3D-printed alginate hydrogels used for preparing tissue-engineered scaffolds is difficult to control. In this work, the use of alginate/gelatin hydrogels reinforced with TiO2 and β-tricalcium phosphate was studied to tailor the mechanical properties of 3D-printed hydrogels. The hydrogels reinforced with TiO2 and β-TCP showed enhanced mechanical properties up to 20 MPa of elastic modulus. Furthermore, the pores of the crosslinked printed structures were measured with an average pore size of 200 μm. Additionally, it was found that as more layers of the design were printed, there was an increase of the line width of the bottom layers due to its viscous deformation. Shrinkage of the design when the hydrogel is crosslinked and freeze dried was also measured and found to be up to 27% from the printed design. Overall, the proposed approach enabled fabrication of 3D-printed alginate scaffolds with adequate physical properties for tissue engineering applications.

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Section: Resultsmentioning

confidence: 99%

Alginate/Gelatin Hydrogels Reinforced with TiO2 and β-TCP Fabricated by Microextrusion-based Printing for Tissue Regeneration

et al. 2019

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“…At this juncture, the authors got an idea to introduce the TiO 2 fillers into the SA polymer solution in order to achieve the good dielectric constant and electrical conductivity. However, in the literature very limited studies were found on SA/TiO 2 polymer composite membranes [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization and dielectric properties of sodium alginate/titanium dioxide composite membranes

2018

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Sodium alginate/titanium dioxide solid polymer composite membranes were prepared by solution casting method. The electrical, optical and thermal properties of these composite membranes are in great demand for advanced electronic device applications. The present study is aimed at the preparation of dioxide membranes to enhance the conductivity of sodium alginate. The diffraction pattern confirmed the change of sodium alginate polymer matrix structure from amorphous to polycrystalline upon dispersing TiO 2 powder particles into sodium alginate solution. The surface morphology also evidenced the non-crystalline and polycrystalline (containing grains and grain boundaries) nature of formed films. The infrared spectra showed the presence of various functional groups such as-OH, C=O, O-H, C-H and Na-O. The differential scanning calorimeter (DSC) investigation revealed the existence of exothermic/endothermic peaks, melting and crystallization temperatures. Furthermore, the weight loss of all the films was described as a function of temperature. The dielectric properties highlighted the 5 wt% of TiO 2 dispersed in the sodium alginate solution due to its high dielectric constant (ε′), dielectric loss (ε″) and ac-electrical conductivity (σ ac).

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“…TiO 2 incorporated into a calcium (Ca)-alginate film matrix was used as a photocatalyst to remove methyl orange with 82.2% effectiveness after 120 min of UV irradiation [14]. ZnO and TiO 2 nanoparticles embedded into Ca-alginate beads were also used as a photocatalyst to remove copper ions [10].…”

Section: Introductionmentioning

confidence: 99%

Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Efficient Removal of Cationic Dye from Aqueous Solution

et al. 2021

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The combination of adsorption and photodegradation processes is an effective technique for the removal of dye contaminants from water, which is motivating the development of novel adsorbent-photocatalyst materials for wastewater treatment. Herein, novel nanocomposite porous beads were developed using titanium dioxide (TiO2) nanotubes embedded in a sodium alginate (SA)/polyvinylpyrrolidone (PVP) matrix using calcium chloride solution as a crosslinker. The prepared nanocomposite beads’ performance was examined as an adsorbent-photocatalyst for the breakdown of methylene blue in aqueous solutions. Several operation factors influencing the dye decomposition process, including photocatalyst dosage, illumination time, light intensity, and stability were investigated. The findings demonstrated that the removal activity of the beads changed with the TiO2 weight ratio in the composite. It was found that SA/PVP/TiO2-3 nanocomposite beads presented the greatest deterioration efficiency for methylene blue dye (98.9%). The cycling ability and reusability of the prepared SA/PVP/TiO2 nanocomposite beads recommend their use as efficient, eco-friendly materials for the treatment of wastewaters contaminated with cationic dyes.

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Preparation, characterization and photocatalytic degradation properties of a TiO₂/calcium alginate composite film and the recovery of TiO₂nanoparticles

Cited by 51 publications

References 31 publications

Alginate/Gelatin Hydrogels Reinforced with TiO2 and β-TCP Fabricated by Microextrusion-based Printing for Tissue Regeneration

Alginate/Gelatin Hydrogels Reinforced with TiO2 and β-TCP Fabricated by Microextrusion-based Printing for Tissue Regeneration

Preparation, characterization and dielectric properties of sodium alginate/titanium dioxide composite membranes

Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Efficient Removal of Cationic Dye from Aqueous Solution

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Preparation, characterization and photocatalytic degradation properties of a TiO2/calcium alginate composite film and the recovery of TiO2nanoparticles

Cited by 51 publications

References 31 publications

Alginate/Gelatin Hydrogels Reinforced with TiO2 and β-TCP Fabricated by Microextrusion-based Printing for Tissue Regeneration

Alginate/Gelatin Hydrogels Reinforced with TiO2 and β-TCP Fabricated by Microextrusion-based Printing for Tissue Regeneration

Preparation, characterization and dielectric properties of sodium alginate/titanium dioxide composite membranes

Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Efficient Removal of Cationic Dye from Aqueous Solution

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Preparation, characterization and photocatalytic degradation properties of a TiO₂/calcium alginate composite film and the recovery of TiO₂nanoparticles