Synthesis of well-defined molecularly imprinted bulk polymers for the removal of azo dyes from water resources

Söylemez, Meshude Akbulut; Okan, Meltem; Güven, Olgun; Barsbay, Murat

doi:10.1016/j.crgsc.2021.100196

Cited by 7 publications

(5 citation statements)

References 38 publications

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“…Polymers synthesized by RDRP techniques possess well-defined molecular architectures and are used in many applications such as drug-delivery [ 57 ], sensors [ 58 , 59 ], molecular imprinting [ 60 , 61 ], polymer–protein conjugates, development of cylindrical, spherical, hyper-branched polymers, pH or temperature responding smart polymers, etc. [ 62 ].…”

Section: Resultsmentioning

confidence: 99%

Hybrid PET Track-Etched Membranes Grafted by Well-Defined Poly(2-(dimethylamino)ethyl methacrylate) Brushes and Loaded with Silver Nanoparticles for the Removal of As(III)

et al. 2022

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Nanoporous track-etched membranes (TeM) are promising materials as adsorbents to remove toxic pollutants, but control over the pore diameter and density in addition to precise functionalization of nanochannels is crucial for controlling the surface area and efficiency of TeMs. This study reported the synthesis of functionalized PET TeMs as high-capacity sorbents for the removal of trivalent arsenic, As(III), which is more mobile and about 60 times more toxic than As(V). Nanochannels of PET-TeMs were functionalized by UV-initiated reversible addition fragmentation chain transfer (RAFT)-mediated grafting of 2-(dimethyamino)ethyl methacrylate (DMAEMA), allowing precise control of the degree of grafting and graft lengths within the nanochannels. Ag NPs were then loaded onto PDMAEMA-g-PET to provide a hybrid sorbent for As(III) removal. The As(III) removal efficiency of Ag@PDMAEMA-g-PET, PDMAEMA-g-PET, and pristine PET TeM was compared by adsorption kinetics studies at various pH and sorption times. The adsorption of As(III) by Ag@DMAEMA-g-PET and DMAEMA-g-PET TeMs was found to follow the Freundlich mechanism and a pseudo-second-order kinetic model. After 10 h, As(III) removal efficiencies were 85.6% and 56% for Ag@PDMAEMA-g-PET and PDMAEMA-g-PET, respectively, while PET template had a very low arsenic sorption capacity of 17.5% at optimal pH of 4.0, indicating that both PDMAEMA grafting and Ag-NPs loading significantly increased the As(III) removal capacity of PET-TeMs.

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Section: Resultsmentioning

confidence: 99%

Hybrid PET Track-Etched Membranes Grafted by Well-Defined Poly(2-(dimethylamino)ethyl methacrylate) Brushes and Loaded with Silver Nanoparticles for the Removal of As(III)

et al. 2022

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“…Meanwhile, the content of pyrrolic N is much higher than that of the other two kinds of nitrogen, indicating that the macrocyclic skeletons were mainly composed of Pc units, but the skeletons are not in perfect form, with pyridinic N‐containing rings and oxidized N derived from the washing procedure being observed. Correspondingly, the C1s XPS could be fitted into four different components, including C=C bonds located at 284.6 eV, C=N bonds at 285.1 eV, C−N bonds at 287.0 eV, and π–π * satellite at 290.9 eV deriving from the delocalized π‐conjugation (Figure 2I) [40] . Besides, thermogravimetric analysis (TGA) experiment under N 2 and air atmosphere was performed at a ramp rate of 10 °C/min from room temperature to 800 °C to determine the thermal stability of the obtained Pc‐CPN (Figure S11).…”

Section: Resultsmentioning

confidence: 99%

“…Correspondingly, the C1s XPS could be fitted into four different components, including C=C bonds located at 284.6 eV, C=N bonds at 285.1 eV, CÀ N bonds at 287.0 eV, and π-π * satellite at 290.9 eV deriving from the delocalized π-conjugation (Figure 2I). [40] Besides, thermogravimetric analysis (TGA) experiment under N 2 and air atmosphere was performed at a ramp rate of 10 °C/min from room temperature to 800 °C to determine the thermal stability of the obtained Pc-CPN (Figure S11). Inductively coupled plasma atomic emission spectroscopy (ICP-AES) indicated that the Mg species was almost completely removed via the washing procedure, and no coordinated Mg was observed according to the pretty low content (< 0.1 wt %).…”

Section: Resultsmentioning

confidence: 99%

Fully Conjugated Poly(phthalocyanine) Scaffolds Derived from a Mechanochemical Approach Towards Enhanced Energy Storage

et al. 2022

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Phthalocyanines (Pc)-derived materials represent an attractive category of porous organic scaffolds featured by extensive π-conjugated networks, but their construction is still limited to the solution-based pathways, producing materials with inferior conductivity and porosity. Herein, a mechanochemistry-driven approach was developed leveraging the on-surface polymerization of aromatic nitrile monomers with ortho-positioned dicyano groups in the presence of metal catalysts (magnesium, zinc, or aluminum) under neat and ambient conditions. Diverse Pc-functionalized conjugated porous networks (Pc-CPNs) were obtained featured by extensively and fully π-conjugated skeletons, high surface areas, and hierarchical porosities. The monomers in this mechanochemical approach could be extended to those difficult to be handled in solution-based procedures. The Pc-CPNs displayed attractive electrochemical performance as supercapacitor and anodes in batteries, together with superb long-term stability.

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“…In free-radical polymerization, there is a reaction between template, functional monomer, and crosslinker in porogen solution, and the mixture is then added to the magnetic core-shell [ 73 ]. The polymerization process will start with the addition of an initiator in the form of free radicals, assisted by heating and irradiation [ 74 ]. Free-radical polymerization can be carried out using several different techniques, such as precipitation polymerization [ 75 ], suspension polymerization [ 76 ], and emulsion polymerization [ 77 ].…”

Section: Methodsmentioning

confidence: 99%

Magnetic Molecularly Imprinted Polymers: An Update on Their Use in the Separation of Active Compounds from Natural Products

et al. 2022

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During the last few years, separation techniques using molecularly imprinted polymers (MIPs) have been developed, making breakthroughs using magnetic properties. Compared to conventional MIPs, magnetic molecularly imprinted polymers (MMIPs) have advantages in sample pretreatment due to their high specificity and selectivity towards analytes as a result of their larger specific surface areas and highly accessible specific binding sites. The techniques of isolation of active compounds from natural products usually require very long process times and low compound yields. When MMIPs are used in sample separation as Solid Phase Extraction (SPE) sorbents, the MMIPs are introduced into the dissolved sample and spread evenly, and they form bonds between the analyte and the MMIPs, which are then separated from the sample matrix using an external magnetic field. This process of separating analytes from the sample matrix makes the separation technique with MMIPs very simple and easy. This review discusses how to synthesize MMIPs, which factors must be considered in their synthesis, and their application in the separation of active compounds from natural products. MMIPs with magnetic core-shells made by co-precipitation can be a good choice for further development due to the high synthesis yield. Further optimization of the factors affecting the size and distribution of magnetic core-shell particles can obtain higher synthesis yields of MMIPs with higher adsorption capacity and selectivity. Thus, they can isolate target compounds from natural plants in high yields and purity.

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Synthesis of well-defined molecularly imprinted bulk polymers for the removal of azo dyes from water resources

Cited by 7 publications

References 38 publications

Hybrid PET Track-Etched Membranes Grafted by Well-Defined Poly(2-(dimethylamino)ethyl methacrylate) Brushes and Loaded with Silver Nanoparticles for the Removal of As(III)

Hybrid PET Track-Etched Membranes Grafted by Well-Defined Poly(2-(dimethylamino)ethyl methacrylate) Brushes and Loaded with Silver Nanoparticles for the Removal of As(III)

Fully Conjugated Poly(phthalocyanine) Scaffolds Derived from a Mechanochemical Approach Towards Enhanced Energy Storage

Magnetic Molecularly Imprinted Polymers: An Update on Their Use in the Separation of Active Compounds from Natural Products

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