A new Ag/Mo-MCM-41 mesoporous electrocatalyst with different weight ratio of Si to Mo (Si/Mo = 25, 50, 100 and 150) was prepared by direct hydrothermal (DHT) method. The synthesized Ag/Mo-MCM-41 was characterized by low angle x-ray diffraction (XRD) analysis, FESEM and FT-IR spectroscopy. The XRD of Ag/Mo-MCM-41 showed when incorporation of Mo into the MCM-41 matrix, the mesoporous structure is distorted slightly and hence the intensities are found to decrease with increase in Ag/Mo concentration. The morphological properties of the synthesized samples were studied by field emission scanning electron microscopy (FESEM) which shows the mesoporous electrocatalyst comprises of highly agglomerated particles. The FT-IR spectrum of the samples showed that the molybdenum was well incorporated within the MCM-41 frame work. The synthesized Ag/Mo-MCM-41 was used to modify glassy carbon electrode (GCE) and the modified electrode (Ag/Mo-MCM-41/GCE) was used to detect 4-chlorophenol (4-CP) in a pH 7.4 phosphate buffer solutions (PBS) by cyclic voltammetry (CV). At the Ag/Mo-MCM-41/GCE, 4-CP oxidized at lower positive potential with larger current response than the bare GCE. The proposed sensor exhibits great potential in the field of electrochemical detection of organic pollutant.
Mesoporous electrocatalyst, Electrochemical Sensing, Direct hydrothermal method