Modification of a PVC-membrane electrode by surfactant modified clinoptilolite zeolite towards potentiometric determination of sulfide

Direct synthesis of Fe-ZSM-5 zeolite and its prospects as efficient electrode material in methanol fuel cell

“…Of the various applications reported, the incorporation of zeolite into electrochemical systems has received increasing attention during recent years. The unique properties of zeolites (such as size, shape and charge selectivity) have been utilized for developing gas-sensors, voltammetric/amperometric and ion selective membrane electrodes [8][9][10]. Zeolitemodified electrodes for electrochemical reactions achieve an amplified response based on the synergistic properties of the constituents [11][12][13] in terms of increased current density.…”

A Selective and Sensitive Sensor for Determination of Sulfide in Aquatic Environment

“…According to the existing literature, the typical concentration range of sulfide in hot spring waters and wastewaters are 9-440 μM [4]- [8] and 2-4750 μM [9]- [13], respectively. These levels of sulfide concentration can be determined by a number of analytical techniques, such as iodimetric [12], [14], spectrophotometric [15]- [22], chromatographic [23], [24], capillary electrophoretic [25], and electrochemical methods [13], [26]- [31]. Among them, electrochemical methods are of particular interest for analysis of sulfide, which is due to their prominent advantages of procedural simplicity, high sensitivity, short analysis time, capability of miniaturization, and low instrumental cost.…”

Effect of a nano-sized natural clinoptilolite modified by the hexadecyltrimethyl ammonium surfactant on cephalexin drug delivery

“…Hence, in an ion exchange process, including cationic surfactants, these large cations only occupy the surface ion exchange sites of zeolites [55,56]. A mono-and bilayer of surfactants can be formed onto the zeolite surface at lower and higher concentration than its critical micelle concentration (CMC).…”

“…The obtained SMZ acts as an anion exchanger, which adsorbs also some organic molecules between the organic chains of the double layer. The concentration of the surfactant solution plays a major role in the adsorption or anion exchange capacity of the related SMZ [55,56]. To study the effect of the modification of the zeolite surface and also the role of the surfactant concentration on the adsorption extent of the used nano-clinoptilolite, some experiments were performed by raw NZ and surfactantmodified nano-clinoptilolite, which were prepared with 50, 10 and 200 mM of HDTMA surfactant, and thereafter referred to as SMZ-1, SMZ-2 and SMZ-3, respectively.…”