Selective, Nanomolar Electrochemical Determination of Environmental Contaminants Dihydroxybenzene Isomers Found in Water Bodies Using Nanocrystalline Zeolite Modified Carbon Paste Electrodes

Abstract

Nanocrystalline zeolites of different framework structures were prepared by the addition of suitable structure directing agents in the synthesis composition of conventional zeolites. Zeolite modified carbon paste electrodes were constructed for the simultaneous determination of dihydroxybenzene isomers. Nanocrystalline zeolite Beta modified carbon paste electrode exhibited the highest electrocatalytic activity. Under optimum conditions, wide linear range was obtained from 150 nM to 400 µM with lower detection limit of 100, 130, and 100 nM for hydroquinone, catechol, and resorcinol, respectively. The analytical performance of the proposed sensor was demonstrated in the simultaneous determination of dihydroxybenzene isomers in different environmental water samples.

Electrochemically pretreated zeolite-modified carbon-paste electrodes for determination of linuron in an agricultural formulation and water

“…This increase in peak intensity can be attributed to increased electroactive area, increased diffusion coefficient, and decreased double-layer capacitance resistance at the electrode-solution interface of ZMCPE6. The maximum peak current observed for the amount of 3.5 grams can be attributed to the high amounts of Si-OH and Al-OH groups present on the electrode surface, producing a maximum current at 3.5 g. At quantities exceeding this value, saturation of the electrode surface occurred, reducing the peak current [43]. …”

Biomineralization of hydroxyapatite in silver ion-exchanged nanocrystalline ZSM-5 zeolite using simulated body fluid

“…Our research is focused on the development of mesoporous polyaniline [14][15][16][17], metal oxides [18][19][20][21], and zeolites [22][23][24][25] based nanocomposite materials. For the synthesis of HAP based nanocomposite materials, it is important to choose a suitable biocompatible material that inculcates sites for the nucleation and growth of HAP.…”

Electrochemical Sensor Platforms Based on Nanostructured Metal Oxides, and Zeolite‐Based Materials

“…These electrodes provided satisfactory results even for various environmental water samples . Large pore diameter and large external surface area of nanocrystalline Beta were accountable for the high electrocatalytic activity compared to other zeolite materials explored in this study.…”

“…Rajendra and co‐authors have reported zeolite (Nano‐Beta, Nano‐ZSM‐5, and Nano‐LTA) modified carbon paste electrodes for the simultaneous electrocatalytic oxidation of HQ, CC, and RC with high selectivity. These electrodes provided satisfactory results even for various environmental water samples .…”