scholarly journals Silica Microspheres-in-Pores Composite Monoliths with Fluorescence and Potential for Water Remediation

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2681
Author(s):  
Adham Ahmed ◽  
Peter Myers ◽  
Haifei Zhang
Keyword(s):  
Organic Dyes ◽  
Monolithic Column ◽  
Porous Polymer ◽  
Water Remediation ◽  
Fluorescent Properties ◽  
Silica Microspheres ◽  
Polymer Monolith ◽  
Unique Material ◽  
Efficient Route ◽  
Porous Composites

Water pollution is a severe worldwide issue. Constructing advanced porous composite materials has been an efficient route to water remediation via adsorption. In this study, a unique microspheres-in-pores monolithic structure was fabricated. An emulsion-templated polymer monolith was first prepared and silica microspheres were subsequently formed in the porous polymer. A silica precursor was modified with a fluorescent dye and co-condensed with other precursors to fabricate porous composites with fluorescent properties, which were enhanced by the presence of Ag nanoparticles in the polymer matrix. This unique material showed good promise in water remediation by removing organic dyes and heavy metal ions from wastewater via a flowing filter or monolithic column separation.

Preparation of a porous polymer monolithic column with an ionic liquid as a porogen and its applications for the separation of small molecules in high performance liquid chromatography

2015 ◽  
Vol 7 (18) ◽  
pp. 7879-7888 ◽  
Author(s):  
Jiafei Wang ◽  
Xiaoya Jiang ◽  
Hang Zhang ◽  
Sha Liu ◽  
Ligai Bai ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Small Molecules ◽  
Small Molecule ◽  
High Performance ◽  
Monolithic Column ◽  
Porous Polymer ◽  
Column Efficiency ◽  
Polymer Monolithic Column

A monolith based on an ionic liquid as a porogen was prepared to enhance the column efficiency of small molecule separation in HPLC.

A simple and high efficient composite based on g-C3N4 for super rapid removal multiple organic dyes in water under sunlight

2022 ◽  
Author(s):  
Siwei Yang ◽  
Qiang Sun ◽  
Weihang Han ◽  
Yuanfang Shen ◽  
Zhigang Ni ◽  
...  
Keyword(s):  
Organic Dyes ◽  
Solvent Evaporation ◽  
Solvent Evaporation Method ◽  
Evaporation Method ◽  
High Efficient ◽  
Rapid Removal ◽  
Porous Composites

A simple and high efficient porous composites via the solvent evaporation method using g-C3N4 and NiSO4 was developed. It can super rapidly remove multiple organic dyes in water including rhodamine...

scholarly journals Zwitterionic Nanocellulose-Based Membranes for Organic Dye Removal

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1404 ◽  
Author(s):  
Carla Vilela ◽  
Catarina Moreirinha ◽  
Adelaide Almeida ◽  
Armando J. D. Silvestre ◽  
Carmen S. R. Freire
Keyword(s):  
Pathogenic Bacteria ◽  
Mechanical Performance ◽  
Organic Dyes ◽  
Dye Adsorption ◽  
High Water ◽  
Water Soluble ◽  
Water Remediation ◽  
Nanocomposite Membranes ◽  
Porous Network ◽  
One Pot

The development of efficient and environmentally-friendly nanomaterials to remove contaminants and pollutants (including harmful organic dyes) ravaging water sources is of major importance. Herein, zwitterionic nanocomposite membranes consisting of cross-linked poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) and bacterial nanocellulose (BNC) were prepared and tested as tools for water remediation. These nanocomposite membranes fabricated via the one-pot polymerization of the zwitterionic monomer, 2-methacryloyloxyethyl phosphorylcholine, within the BNC three-dimensional porous network, exhibit thermal stability up to 250 °C, good mechanical performance (Young’s modulus ≥ 430 MPa) and high water-uptake capacity (627%–912%) in different pH media. Moreover, these zwitterionic membranes reduced the bacterial concentration of both gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) pathogenic bacteria with maxima of 4.3– and 1.8–log CFU reduction, respectively, which might be a major advantage in reducing or avoiding bacterial growth in contaminated water. The removal of two water-soluble model dyes, namely methylene blue (MB, cationic) and methyl orange (MO, anionic), from water was also assessed and the results demonstrated that both dyes were successfully removed under the studied conditions, reaching a maximum of ionic dye adsorption of ca. 4.4–4.5 mg g−1. This combination of properties provides these PMPC/BNC nanocomposites with potential for application as antibacterial bio-based adsorbent membranes for water remediation of anionic and cationic dyes.

Preconcentration of bisphenols by using calix[4]arene derivatives modified porous polymer monolith coupled with HPLC

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 36256-36263 ◽  
Author(s):  
Huiqi Wang ◽  
Shigang Wei ◽  
Huihui Zhang ◽  
Qiong Jia
Keyword(s):  
Porous Polymer ◽  
Butyl Methacrylate ◽  
Polymer Monolith ◽  
Polymer Monolith Microextraction ◽  
Ethylene Dimethacrylate ◽  
Porous Polymer Monolith

A functionalized calix[4]arene (alkenyl@C[4]A) was introduced into the poly(butyl methacrylate-ethylene dimethacrylate) monolith inside a capillary to prepare a polymer monolith microextraction (PMME) material (poly(BMA-alkenyl@C[4]A-EDMA)).

Microfluidic Devices for Flow-Through Supported Palladium Catalysis on Porous Organic Monolith

2008 ◽  
Vol 61 (8) ◽  
pp. 630 ◽  
Author(s):  
Allan J. Canty ◽  
Jeremy A. Deverell ◽  
Anissa Gömann ◽  
Rosanne M. Guijt ◽  
Thomas Rodemann ◽  
...  
Keyword(s):  
Fused Silica ◽  
Porous Polymer ◽  
Epoxide Ring ◽  
Internal Diameter ◽  
Long Term Stability ◽  
Fused Silica Capillaries ◽  
Polymer Monolith ◽  
Ethylene Dimethacrylate ◽  
Flow Through ◽  
Continuous Material

Flow-through microreactors are described, constructed of fused silica capillaries with an internal diameter of 100 μm and glass microchips with a channel dimension of 150 μm and involving the in situ UV-initiated synthesis of a poly(glycidyl methacrylate-co-ethylene dimethacrylate) porous polymer monolith. The monolith is a continuous material covalently bonded to the capillary or chip walls, with good flow-through properties. Epoxide ring-opening through amine attack by 5-amino-1,10-phenanthroline and coordination to dichloropalladium(ii) allows use of the microreactors for Suzuki–Miyaura catalysis. The long-term stability and reliability of the robust chip microreactor is demonstrated by operation for 96 h, exhibiting undiminished reactivity, and very low leaching of palladium.

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