Abstract
A new pH sensor suitable for determination of amino groups on surface modified nanomaterials (SMNs) is reported. The sensor has been constructed based on a poly 8‐hydroxyquinoline‐5‐sulfonic acid (HQS) thin film that was electrochemically deposited onto a Pt disc electrode previously modified with Pt nanoparticles. The poly HQS film was deposited from HAc‐NaAc solution containing HQS monomer by cycling the potential between 0.4 V and 1.4 V. The emf signal was linear over the pH range of 1.3 to 13.4 with a super Nernstian slope of 62.6 mV/pH unit. Response time ranged from several sec at pH around 7 up to 1 min at pH 13.4. The performance of the pH sensor was examined by measuring organic acid/amine and amino groups on surface modified nanomaterials samples.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
