Characterization of Mo-MCM-41 and its Electrochemical Sensing Property

Abstract

By direct hydrothermal method, Mo-MCM-41 mesoporous catalysts with different Si/Mo ratio were prepared. Mo-MCM-41 was characterized by XRD, FT-IR, and DRS UV-Vis spectroscopy. The morphological property of the samples was characterized by SEM. The SEM images show the agglomeration of the particles. The synthesized Mo-MCM-41 was used to modify glassy carbon electrode (Mo-MCM-41/GCE). The detection of 4-chlorophenol (4-CP) using Mo-MCM-41/GCE in a pH 7.4 phosphate buffer solution (PBS) was carried out by cyclic voltammetry (CV). At the Mo-MCM-41/GCE, 4-CP is oxidized at less positive potential with larger current response than the bare GCE.

Mesoporous Materials‐Based Electrochemical Sensors

“…In this respect, mesoporous silica is probably the material offering the widest range of surface modification and functionalization, as illustrated in Figure 5 for the various systems used to date in electrochemical sensors. The simplest strategy (see top of Figure 5) is the adsorption of organic molecules likely to act as ligand (acetylacetonate, acac 164) or receptor (β‐cyclodextrin, β‐CD 165) for selective recognition of target analytes, or the immobilization of nanoparticles (such as gold 166, titanium 167, Ni(OH) 2 168, or bimetallic Ag/Mo 169) acting as catalysts, or the deposition of redox‐active polymeric materials (poly(vitamin B1) 170, poly(4‐vinylpyridine)‐[Os(bpy) 2 Cl] + 171). The interactions expected to be involved in this process are weak, making questionable the long‐term stability of the resulting hybrid materials.…”

Polyaniline Nanorods: Synthesis, Characterization, and Application for the Determination ofpara-Nitrophenol

“…However, utilization of the bare glassy carbon electrode (GCE) has drawbacks that include low response, fouling, and low sensitivity. Consequently, chemically modified electrodes have been widely examined, including the use of carbon nanotubes (Luo et al 2008), gold nanoparticles (Chu, Han, and Zhang 2011), Fe2O3 , polymers ), composites , Fan et al 2011, Roy et al 2013, mobile crystalline material-41 (Thatshanamoorthy et al 2014), and hydroxyapatite (Mhammedi et al 2009). However, these materials have limitations that include low yield of the product, difficult preparation, high cost, low sensitivity, and poor precision.…”

Template-Assisted Hydrothermal Synthesis of Li2MnSiO4 as a Cathode Material for Lithium Ion Batteries

“…Mesoporous material with regularly ordered pore arrangement and constant pore diameter from 2 to 10 nm was revealed by the Mobil Corporation Strategy Research Center. − Since then, numerous research studies have been concentrated on MCM-41. This new family of mesoporous molecular sieves has high specific area (up to 1000 m 2 g –1 or higher), a well-defined mesoporous array, and good adsorption properties. ,,, These excellent properties endow them with potential applications in catalysis, adsorption, sensors, and LIBs. − Fabricating a mesoporous architecture with internal pores is a favorable route to buffer the effect of the volume changes during lithium extraction/insertion, and ensure the electrolyte penetration into the materials and thus enlarge the contact area and shorten Li + extraction/insertion pathways during cycling. ,, Additionally, template-assisted approaches are widely used for surface modification to create electrostatic or chemical interactions …”