Electrochemical Quantification of Lead Adsorption on TiO₂ Nanoparticles

Abstract

This work describes a rapid easy‐to‐use electrochemical method for quantifying lead (Pb2+) adsorption on metal oxide nanoparticles (NPs), demonstrated here for titanium dioxide (TiO2). The method was able to quantify Pb2+ adsorption for concentrations as low as 0.95 μM, and up to 200 μM in NP dispersions, and to differentiate ion uptake in the presence and absence of a natural organic material, humic acid (HA). The method was selective for Pb2+ against Cu2+, As3+, Zn2+, Cd2+ and Cr3+ ions when measured in the specific potential range from −0.4 to −0.6 V and was successfully demonstrated in water and home‐collected dust.

Development and characterization of electrochemical sensors based on carbon modified with TiO2 nanoparticles

“…Posjeduje jednostavnu elektronsku strukturu sa popunjenom valentnom zonom i praznom provodnom zonom [13][14][15][16]. Ugljenične elektrode modifikovane nanočesticama TiO2 su našle veoma široku primjenu u elektroanalitičkim metodama određivanja različitih neorganskih, organskih i bioloških supstanci [17][18][19][20][21][22][23]. Mogućnost praktične primjene modifikovanih ugljeničnih elektroda u elektroanalitičke svrhe u značajnoj mjeri zavisi od fizičko-hemijskih i elektrohemijskih karakteristika elektrodne paste.…”

Advances in electrochemical detection methods for measuring contaminants of emerging concerns

“…The most commonly studied nanomaterials with nano‐impact electrochemistry are Ag NPs as Ag NPs are easily oxidized and can be easily quantified by electrochemistry. [ 297 ] This method has been used for characterizing metals and metal oxide NPs like Ag, Pt, TiO 2 , CeO 2 , and its usability has been demonstrated for quantifying surface coatings [ 298 ] and contaminant adsorption such as Pb on TiO 2 [ 299 ] and As on CeO 2 [ 300 ] and magnetite [ 301 ] (Figure 16). These methods can speed up characterization and provide alternative low‐cost platforms for the screening and reactivity evaluation of nanomaterials.…”