Synthesis of Transition‐Metal Exchanged Nanocrystalline ZSM‐5 and Their Application in Electrochemical Oxidation of Glucose and Methanol

Abstract

Nanocrystalline ZSM‐5 was prepared using propyltriethoxysilane. Materials were characterized by a complementary combination of X‐ray diffraction, nitrogen sorption, and scanning electron microscopy. Transition‐metal ion exchanged nanocrystalline ZSM‐5‐modified electrodes were constructed for the electrocatalytic oxidation of glucose and methanol. A non‐enzymatic electrochemical sensor based on a Ni2+‐exchanged nanocrystalline ZSM‐5‐modified electrode exhibits the highest sensing ability, whereas the corresponding Cu2+‐exchanged electrode exhibits the highest current sensitivity for glucose oxidation. Among the variety of electrodes modified with transition‐metal ion exchanged nanocrystalline ZSM‐5, the Ni2+‐exchanged electrode exhibits high current sensitivity and sensing ability in methanol oxidation. Electrocatalytic activity of conventional ZSM‐5‐modified electrodes was significantly low compared to nanocrystalline ZSM‐5‐modified electrodes. Enhancement in the electrocatalytic activities of nanocrystalline ZSM‐5‐modified electrodes can be correlated with the enhanced accessibility of glucose/methanol to M2+ active centers in the nanocrystalline ZSM‐5 owing to its large specific surface area and intercrystalline mesopores. The sensor was applied directly to determine glucose concentration in adult human blood serum, and the precision of the method was found to be satisfactory. The non‐enzymatic sensor exhibited excellent reproducibility, repeatability, stability, and antifouling ability for direct determination of glucose in human blood serum.

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

“…Nanocrystalline zeolite (Nano-ZSM-5) was synthesized by following the reported procedure [22]. In a typical synthesis, 0.48 g of sodium aluminate (53 wt.% Al 2 O 3 , 43 wt.% Na 2 O) was dissolved in 25 mL deionized water to get solution A.…”

“…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.…”

A polyaniline–zeolite nanocomposite material based acetylcholinesterase biosensor for the sensitive detection of acetylcholine and organophosphates

“…18 Propylamine was then covalently anchored on Nano-ZSM-5. 18 Propylamine was then covalently anchored on Nano-ZSM-5.…”

“…2 The OP compounds are widely used as pesticides due to their high efficiency in controlling insects. [18][19][20] In the recent years, zeolites and conducting polymer based electrodes have attracted increasing interest in electrocatalysis. This pesticide contamination is a severe threat to human health due to their long term persistence in the environment and high toxicity to AChE even at very low levels of exposure.…”

Nanocrystalline ZSM-5 based bi-functional catalyst for two step and three step tandem reactions

“…Na 2 O/25 TPAOH/2500 H 2 O by following the reported procedure 45,46. In a typical synthesis of nanocrystalline zeolite (Nano-ZSM-5), 1.44 g sodium aluminate (53 wt% Al 2 O 3 , 43 wt% Na 2 O) was dissolved in 75 mL distilled water (Solution A).…”