Synthesis and characterization of polysulfone–TiO2 decorated MWCNT composite membranes by sonochemical method

Muhulet, Alexandru; Tuncel, Cristina; Miculescu, Florin; Pandele, Andreea Mădălina; Bobiricǎ, Constantin; Orbeci, Cristina; Bobiricǎ, Liliana; Palla-Papavlu, Alexandra; Voicu, Ştefan Ioan

doi:10.1007/s00339-020-3408-9

Cited by 29 publications

(20 citation statements)

References 42 publications

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“…The O 1s XPS spectra of TiNPs/PSF and PSF ( Figure 3 c) is separated into three peaks at 529.7 eV, 531.0 eV, 531.9 eV, and 533.4 eV, which are assigned to Ti–O–Ti (lattice O), Ti–OH (surface hydroxyl), the O=S=O and C–O species of the TiNPs/PSF microsphere, respectively. [ 36 , 37 ] The XPS spectra of C1s ( Figure 3 d) of is fitted into four peaks of 284.6 eV (C–S) and 286.0 eV (C–C) [ 24 ]. The peaks situated at 458.2 eV and 464.0 eV can be assigned to the 2p 3/2 and 2p 1/2 of Ti 4+ , correspondingly ( Figure 3 e).…”

Section: Resultsmentioning

confidence: 99%

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

et al. 2021

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Nanosized titanium oxide (TiO2) material is a promising photocatalyst for the degradation of organic pollutants, whereas the difficulty of its recycling hinders its practical application. Herein, we reported the preparation of a novel titanium oxide/polysulfone (TiNPs/PSF) composite hollow microspheres by the combination of Pickering emulsification and the solvent evaporation technique and their application for the photodegradation of methyl blue (MB). P25 TiO2 nanoparticles dispersed on the surface of PSF microspheres. The porosity, density and photoactivity of the TiNPs/PSF composite microsphere are influenced by the TiO2 loading amount. The composite microsphere showed good methyl blue (MB) removal ability. Compared with TiO2 P25, and PSF, a much higher MB adsorption speed was observed for TiNPs/PSF microspheres benefited from their porous structure and the electrostatic attractions between the MB+ and the negatively charged PSF materials, and showed good degradation efficiency. For TiNPs/PSF composite microsphere with density close to 1, a 100% MB removal (10 mg L−1) within 120 min at a catalyst loading of 2.5 g L−1 can be obtained under both stirring and static condition, due to well dispersing of TiO2 particles on the microsphere surface and its stable suspending in water. For the non-suspended TiNPs/PSF composite microsphere with density bigger than 1, the 100% MB removal can be only obtained under stirring condition. The removal efficiency of MB for the composite microspheres retained 96.5%, even after 20 cycles. Moreover, this composite microsphere also showed high MB removal ability at acidic condition. The high catalysis efficiency, excellent reusability and good stability make this kind of TiNPs/PSF composite microsphere a promising photocatalyst for the water organic pollution treatment.

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Section: Resultsmentioning

confidence: 99%

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

et al. 2021

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“…In the synthesis of nanostructured titanium oxide materials, the sonochemical method [59][60][61] has been used, which is associated with the acoustic cavitation of air bubbles and their explosive collapse in a liquid medium. Cavitation collapse of bubbles leads to a local increase in temperature (~ 5000 K) and pressure (~ 1000 atm).…”

Section: Other Methodsmentioning

confidence: 99%

Methods of Titanium Dioxide Synthesis (Review)

Mironyuk

Soltys

Tatarchuk

et al. 2020

Phys. Chem. Solid St.

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TiO2-based nanomaterials are attracting much attention in many areas, such as photocatalysis, photoelectricity, probing, electrochromism, photochromism, etc. They are widely used in paints, polymers, sunscreens, and toothpaste. There are various ways of synthesis that affect the size, shape, and crystallinity of TiO2 nanoparticles. The main methods of obtaining titanium dioxide (with the structure of anatase, rutile or brookite) in the form of spheres, rods, fibers, and tubes include: sol-gel technology, hydrothermal and solvothermal methods, microwave method involving high-frequency electromagnetic waves, template method, electrodeposition, a sonochemical method using ultrasound, chemical and physical vapor deposition, "green" methods, etc. This literature review presents modern scientific results on the production of TiO2 nanoparticles by various methods.

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“…The first large-scale industrial applications emerged after the Second World War when large amounts of nitrocellulose leftover from unused bombs were transformed into membranes for water filtration and purification to make it drinkable, under the guardianship of the Marshall Plan, thus giving birth to the company Millipore [3]. From the point of view of polymers used in the manufacturing of membranes, virtually any polymer that can dissolve in a solvent, for which the solvent exists a total non-solvent miscible with it, can lead to the preparation of polymer membranes by phase inversion technique [4][5][6]. The most commonly used polymers for membrane synthesis are cellulose derivatives, polysulfones and polyethersulfones, polyamide, etc.…”

Section: Introductionmentioning

confidence: 99%

Graphene-based composite membranes for nanofiltration: performances and future perspectives

Voicu

Thakur

2021

emergent mater.

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Nanofiltration is one of the most widely used membrane processes for water purification with high practical value because of a large number of chemical species that are separated through this process. Usually, for nanofiltration, high energy–consuming operations are involved including the generation of enough pressure for the rejection of jumps and lower molecular weight chemicals at the surface of the membrane. Recent developments in the synthesis of nanocomposite membranes with graphene and graphene derivatives have led to an increase in energy requirements and the increase in membranes performances. In the present review, we have presented the recent advances in the field of graphene-based composite membranes for nanofiltration with applications for both types of based solvents—aqueous solutions and organic solvents. The presentation will be focused especially on the performances of membranes and applications of these materials for the rejection of salts (Na+, Mg2+), heavy metals (Li2+), and lower molecular weight organic compounds (methylene blue, Congo red, Direct Red, Methyl orange, Reactive green 13, etc.). Modern synthesis methods like interfacial polymerization for obtaining thin-film composite nanofiltration membranes are also presented.

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Synthesis and characterization of polysulfone–TiO2 decorated MWCNT composite membranes by sonochemical method

Cited by 29 publications

References 42 publications

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

Methods of Titanium Dioxide Synthesis (Review)

Graphene-based composite membranes for nanofiltration: performances and future perspectives

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