A nanocomposite based on multi-walled carbon nanotubes grafted by molecularly imprinted poly(methacrylic acid–hemin) as a peroxidase-like catalyst for biomimetic sensing of acetaminophen

Abstract

In the present study the synthesis of a nanocomposite based on multi-walled carbon nanotubes grafted by poly(methacrylic acid–hemin) is described.

Development of Electrochemical Platform Based on Molecularly Imprinted Poly(methacrylic acid) Grafted on Iniferter‐modified Carbon Nanotubes for 17β‐Estradiol Determination in Water Samples

“…MIP polymerization on the surface of carbonaceous material by exploring the free-radical polymerization (FRP) method has also been reported [31]. This technique involves a physical or covalent immobilization of vinyl or acrylate groups in the carbonaceous material surface and the radical polymerization takes place in the presence of a thermal or photoinitiator [32][33][34][35][36][37]. As the polymerization is started by a radical initiator in solution, the MIP formation takes place not only at the surface of carbonaceous material, thereby resulting in a non-homogenous material.…”

Preparation of Molecularly Imprinted Poly(methacrylic acid) Grafted on Iniferter-Modified Multiwalled Carbon Nanotubes by Living-Radical Polymerization for 17β-Estradiol Extraction

“…For the pristine MWCNT, MIP/ MWCNT, and NIP/MWCNT spectra (Figure 1a), it is observed an intense absorption band at 3430 cm −1 that can be attributed to the (O−H) stretching vibration from carboxyl group from MAA on nanocomposites surface and water physically adsorbed. 34 For the nanocomposites, a band at 1630 cm −1 was attributed to CO stretching of quinone groups on the surface of MWCNT generated from oxidation treatment. Such an outcome indicates that the surface of MWCNT was not fully covered with a narrow layer of MIP.…”

“…First, pristine MWCNT was oxidized by acid treatment according to literature data. 34 In a round-bottom flask, 600 mg of MWCNT was mixed with 80.0 mL of HNO 3 /H 2 SO 4 (3:1 v/v) for 2 h at 65 °C. The obtained material (MWCNTox) was washed with water until pH ≅ 7.0 to remove acid excess and oven-dried at 35 °C.…”

Customized Bio‐functionalization of Nanocomposite Carbon Paste Electrodes for Electrochemical Sensing: A Mini Review

“…(Bio)modifier agents, such as catalysts, enzymes, nanoparticles, ligands, antibodies, DNA, aptamers or (bio)molecules can confer selectivity and sensitivity to the functionalized transducer, which in turn enhance the analytical performance of (bio)sensor devices. They may perform the following functions: (i) they may act on the analyte by pre‐concentrating it on electrode surface and selectively recognize it ; (ii) they may be used as redox mediators or catalysts, accelerating the oxidation or reduction of different analytes , ; (iii) they can be used as template support to immobilize some of the (bio)molecules involved in the electrochemical reactions or (iv) they can be used as scattering materials, dispersing the conducting microzones throughout the insulating polymeric matrix . Among the wide range of (bio)modifiers, an approximate overview on the most common ones are summarized above with some illustrative examples below.…”