scholarly journals Electrospun Poly(methyl methacrylate)/TiO2 Composites for Photocatalytic Water Treatment

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3923
Author(s):  
Olya Stoilova ◽  
Nevena Manolova ◽  
Iliya Rashkov
Keyword(s):  
Water Treatment ◽  
Methyl Methacrylate ◽  
Uv Light ◽  
Organic Pollutant ◽  
Photocatalytic Efficiency ◽  
Flow Rates ◽  
Poly Methyl Methacrylate ◽  
Uv Light Irradiation ◽  
One Step ◽  
The One

Electrospinning was successfully used for the one-step fabrication of poly(methyl methacrylate) (PMMA) fibers loaded with an inorganic photocatalyst—titanium oxide (TiO2). By tuning the PMMA/TiO2 ratio and the electrospinning conditions (applied voltage, needle tip-to-collector distance, and flow rates), PMMA/TiO2 composites with selected organic/inorganic ratios, tailored designs, and targeted properties were obtained. The morphology of the electrospun composites was affected by the amount of TiO2 incorporated into the PMMA fibers. In addition, the inorganic photocatalyst had an impact on the wettability, thermal stability, and optical properties of the electrospun composites. In particular, the surface wettability of the composites was strongly influenced by UV light irradiation and from hydrophobic became superhydrophilic. Moreover, PMMA/TiO2 composites had enhanced tensile strength in comparison with those of bare PMMA mats. The electrospun PMMA/TiO2 composites showed excellent photocatalytic efficiency against the model organic pollutant—methylene blue—which is very promising for the future development of membranes that are highly efficacious for photocatalytic water treatment.

scholarly journals Poly(methyl methacrylate)-grafted ZnO nanocomposites with variable dielectric constants by UV light irradiation

2016 ◽  
Vol 4 (16) ◽  
pp. 3640-3645 ◽  
Author(s):  
Kenichi Hayashida ◽  
Yasuhiro Takatani
Keyword(s):  
Methyl Methacrylate ◽  
Zno Nanoparticles ◽  
Uv Light ◽  
Dielectric Constants ◽  
Light Irradiation ◽  
Free Electrons ◽  
Poly Methyl Methacrylate ◽  
Uv Light Irradiation

Theεr′ of PMMA-grafted ZnO nanoparticles was greatly enhanced by irradiation of UV light owing to Maxwell–Wagner polarization of the resultant free electrons.

Poly(methyl methacrylate)-modified cellulose fibers patterned with highly selective chromogenic reagent for rapid and trace determination of Co2+ in water

2018 ◽  
Vol 10 (36) ◽  
pp. 4454-4462 ◽  
Author(s):  
Liyakat Hamid Mujawar ◽  
Mohammad Soror El-Shahawi
Keyword(s):  
Methyl Methacrylate ◽  
Polymethyl Methacrylate ◽  
Filter Paper ◽  
Cellulose Fibers ◽  
Trace Determination ◽  
Poly Methyl Methacrylate ◽  
Chromogenic Reagent ◽  
One Step ◽  
Modified Cellulose

A simple one-step assay for the trace determination of Co2+ was developed on filter paper modified with solubilized polymethyl methacrylate (PMMA) and arrays of 3-[(2-mercapto-vinyl)-hydrazono]-1,3-dihydro-indol-2-one (MHDI) reagent.

Grafting and properties of a porous poly(methyl methacrylate) film on a silicon surface by a one-step dipping method

2017 ◽  
Vol 134 (37) ◽  
pp. 44930 ◽  
Author(s):  
Shanshan Zhang ◽  
Junhong Zhang ◽  
Ming Li ◽  
Wenqi Zhang ◽  
Liqiang Cao
Keyword(s):  
Methyl Methacrylate ◽  
Silicon Surface ◽  
Poly Methyl Methacrylate ◽  
One Step ◽  
Porous Poly

Structural study of semi-crystalline blends of poly(vinylidene fluoride) and poly(methyl methacrylate) by means of linear correlation and interface distribution functions

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Mohamed Fatnassi ◽  
Fadhel Ben Cheikh Larbi ◽  
André Dubault ◽  
Jean Louis Halary
Keyword(s):  
Methyl Methacrylate ◽  
Vinylidene Fluoride ◽  
Structural Parameters ◽  
Cylindrical Symmetry ◽  
Distribution Functions ◽  
Lamellar Thickness ◽  
Poly Methyl Methacrylate ◽  
Density Correlation ◽  
Poly Vinylidene Fluoride ◽  
The One

AbstractIn this article small-angle X-ray scattering (SAXS) is used to characterize the structural parameters of semi-crystalline blends of poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate). Different blend compositions from 100 to 50 wt.-% of PVDF were investigated. The samples were considered to be isotropic. As two-dimensional SAXS patterns with cylindrical symmetry were examined, a single direction in the SAXS pattern plane was chosen to collect and plot absolute intensities versus the scattering vector. Using the one-dimensional (linear) electron density correlation and interface distribution functions obtained, respectively, from the Fourier-transformed Lorentz-corrected experimental scattering intensity and from the interference function, structural parameters such as the minimal value and the most probable value of the long period, the average lamellar thickness, and the volume crystallinity were determined.

scholarly journals Geopolymer-TiO2 Nanocomposites for Photocsatalysis: Synthesis by One-Step Adding Treatment Versus Two-Step Acidification Calcination

Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 658 ◽  
Author(s):  
Xiaohui Yang ◽  
Yi Liu ◽  
Chunjie Yan ◽  
Ronghua Peng ◽  
Hongquan Wang
Keyword(s):  
Photocatalytic Activity ◽  
Treatment Process ◽  
Photocatalytic Efficiency ◽  
Step Method ◽  
Calcination Process ◽  
Tio2 Particles ◽  
Study Results ◽  
Photocatalytic Activities ◽  
One Step ◽  
The One

Geopolymer-TiO2 nanocomposites were prepared by two different techniques, namely the two-step acidification calcination treatment and one-step adding method. The potential photocatalytic activities of geopolymer-TiO2 nanocomposites prepared by the two different methods were tested and compared. Nanocomposites prepared via the one-step process showed better photocatalytic activity. The amount of TiO2 particles loaded on the surface of the foaming materials was investigated by XRD and SEM-Mapping. By comparing with the sample obtained from two-step treatment, the TiO2 particles were distributed uniformly on the surface of the foaming materials for the sample obtained from the one-step method in this study. Results showed that the specific surface area of the geopolymer-TiO2 prepared by the one-step treatment process (28.67 m2/g) was significantly lower than the two-step acidification calcination process (215.04 m2/g), while the photocatalytic efficiency with methylene blue trihydrate (MB) was better. This is due to the more stable structure of geopolymer-TiO2 nanocomposites, the better dispersion and more loading of TiO2 particles on the foaming materials surfaces, leading to the enhanced photocatalytic activity.

scholarly journals Enhanced Optical Switching Characteristics of Organic Phototransistor by Adopting Photo-Responsive Polymer in Hybrid Gate-Insulator Configuration

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 527 ◽  
Author(s):  
Hea-Lim Park ◽  
Min-Hoi Kim ◽  
Hyeok Kim
Keyword(s):  
Methyl Methacrylate ◽  
Interfacial Layer ◽  
Optical Switching ◽  
Uv Light ◽  
Charge Carriers ◽  
Gate Insulator ◽  
Poly Methyl Methacrylate ◽  
Responsive Polymer ◽  
Switching Characteristics ◽  
Organic Phototransistor

In this study, we developed polymer gate insulator-based organic phototransistors (p-OPTs) with improved optical switching properties by using a hybrid gate insulator configuration. The hybrid gate insulator of our p-OPT has a photoresponsive layer made of poly(4-vinylphenol) (PVP), which enhances the photoresponse, and an interfacial layer of poly(methyl methacrylate) for reliable optical switching of the device. Our hybrid gate insulator-equipped p-OPT exhibits well-defined optical switching characteristics because no specific type of charge is significantly trapped at an interfacial layer/organic semiconductor (OSC) interface. Moreover, our device is more photoresponsive than the conventional p-OPT (here, an OPT with a single-polymer poly(methyl methacrylate) (PMMA) gate insulator), because the characteristic ultraviolet (UV) absorption of the PVP polymer allows the photoresponsive layer and OSC to contribute to the generation of charge carriers when exposed to UV light.

The Influence of UV Light on Performance of Poly(methyl Methacrylate) in Regard to Dye-Sensitised Solar Cells

2019 ◽  
Vol 24 (1) ◽  
pp. 127-136 ◽  
Author(s):  
Kazimierz Darowicki ◽  
Michał Szociński ◽  
Katarzyna Schaefer ◽  
Douglas J. Mills
Keyword(s):  
Solar Cells ◽  
Methyl Methacrylate ◽  
Uv Light ◽  
Poly Methyl Methacrylate

Anti-reflective properties of nano-structured alumina thin films on poly(methyl methacrylate) substrates by the sol–gel process with hot water treatment

2008 ◽  
Vol 516 (14) ◽  
pp. 4526-4529 ◽  
Author(s):  
Kiyoharu Tadanaga ◽  
Naoko Yamaguchi ◽  
Yusuke Uraoka ◽  
Atsunori Matsuda ◽  
Tsutomu Minami ◽  
...  
Keyword(s):  
Thin Films ◽  
Water Treatment ◽  
Methyl Methacrylate ◽  
Sol Gel ◽  
Hot Water ◽  
Hot Water Treatment ◽  
Poly Methyl Methacrylate ◽  
Sol Gel Process

The influence of a hydrophobic carrier, reactant and product during H2O adsorption on Pd surface for the oxidative esterification of methacrolein to methyl methacrylate

2018 ◽  
Vol 20 (15) ◽  
pp. 9965-9974 ◽  
Author(s):  
Jing Ma ◽  
Xueqing Yang ◽  
Yan Nie ◽  
Baohe Wang
Keyword(s):  
Methyl Methacrylate ◽  
Model Reaction ◽  
Oxidative Esterification ◽  
One Step ◽  
The One

Taking the one-step oxidative esterification of MAL to MMA as a model reaction, the effects of the hydrophobic carrier SDB copolymer, the reactant CH3OH and the product MMA during the adsorption of H2O on a Pd surface were investigated.

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