Electrochemical properties of silver nanoparticles decorated aminosilicate functionalized TiO2 nanocomposite in hydrazine sensing

Document Type

Article

Publication Date

2-1-2025

Abstract

An electrochemical hydrazine sensor was constructed using a glassy carbon electrode (GCE) customized with a silver-decorated aminosilicate functionalized TiO2 nanocomposite ((Ag/f-TiO2)NCM). Nanoporous TiO2 spheres were prepared and functionalized with aminosilicate (APS), serving as the catalyst support. Silver nanoparticles (AgNPs) were then deposited onto the functionalized TiO2 (f-TiO2) using a chemical reduction method. The modified sensing electrode ((Ag/f-TiO2)NCM) demonstrated superior hydrazine detection capabilities, with a lower limit of detection (LoD) of 0.26 mu M and a sensitivity of 1.297 mu A mu M-1 cm-2. Additionally, the selectivity of (Ag/f-TiO2)NCM for hydrazine was investigated, showing high selectivity over several potential interferents, including Li+, Na+, K+, Cl-, Mg2+, NH4+, Ca2+, and NO3-. The strong metal-support interaction between Ag and TiO2 was thought to modify the electronic properties, thereby enhancing the catalytic activity through efficient charge transfer and improving the stability of the catalysts. This sensing strategy paves the way for the sensitive detection of hydrazine in spiked water samples.

Keywords

Metal nanoparticles, Metal oxides, Aminosilicate functionalization, Electrochemical sensor, Environmental remediation

Publication Title

Physica B-Condensed Matter

Divisions

PHYSICS

Funders

King Saud University (RSP2025R373)

Volume

699

Publisher

Elsevier

Publisher Location

RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS

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