High-Performance pH Sensor Electrodes Based on a Hexagonal Pt Nanoparticle Array-Coated Nanoporous Alumina Membrane

Porous anodic alumina membranes coated with Pt nanoparticles (PAAM/Pt) have been employed as pH sensor electrodes for H+ ion detection. The PAAM was designed using a two-step anodization process. Pt nanoparticles were then sputtered onto the membrane at different deposition times. The membrane’s mor...

Full description

Saved in:
Bibliographic Details
Published in:Materials 2022-09, Vol.15 (19), p.6515
Main Authors: Altowyan, Abeer S., Shaban, Mohamed, Gamel, Asmaa, Gamal, Ahmed, Ali, Mona, Rabia, Mohamed
Format: Article
Language:English
Subjects:
Alumina
Aluminum compounds
Aluminum oxide
Anodic coatings
Coatings
Electric potential
Electrodes
Glass substrates
Hydrogen-ion concentration
Ion detectors
Membranes
Metal oxides
Nanoparticles
Optical properties
Porous materials
Response time
Selectivity
Sensors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Porous anodic alumina membranes coated with Pt nanoparticles (PAAM/Pt) have been employed as pH sensor electrodes for H+ ion detection. The PAAM was designed using a two-step anodization process. Pt nanoparticles were then sputtered onto the membrane at different deposition times. The membrane’s morphological, chemical, and optical characteristics were carefully assessed following the fabrication stage using a variety of analytical techniques. The potential of the PAAM/Pt sensor electrode was investigated by measuring the potential using a simple potentiometric method. The effects of depositing Pt nanoparticles for 3–7 min on sensor electrode sensitivity were examined. The optimal potentiometric Nernstian response slope for the PAAM/Pt sensor electrode with 5 min Pt sputter coating is 56.31 mV/decade in the pH range of 3.0 to 10 at 293 K. Additionally, the PAAM/Pt sensor electrode’s stability and selectivity in various ions solutions were examined. The sensor electrode had a lifetime of more than six weeks and was kept in a normal air environment.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15196515