Preparation of a Nitrite Electrochemical Sensor Based on Polyaniline/Graphene-Ferrocenecarboxylic Acid Composite Film Modified Glass Carbon Electrode and its Analytical Application

<i>In Situ</i> Self-Assembled Graphene-Polyaniline Nanocomposite Thin Films for Ammonia Gas Sensor

“…For PANI film, the absorption peak at 363 nm is assigned to the π→π* of the benzenoid ring, and the band located at 833 nm is attributed to π→polaron transition. The red shift of π→π* transition and π→polaron transition was found compared to that of PANI, indicating the transition energy difference of graphene/PANI decreases compared with PANI [9,10]. (1) Where R G and R air is the resistance value of films in NH 3 and air, respectively.…”

Electrochemical Grafting of Graphene Nano Platelets with Aryl Diazonium Salts

“…For sulfite ions, the linear regression equation is I (nA) = 2.1(±0.2) c (nM) (R = 0.9995) in the range from 5 μM to 1.0 mM, and the detection limit was 1.66 μM. Therefore, GNP-NH 2 exhibits better performance not only for the detection of nitrite ions (e.g., a detection limit of 33 nM, higher than 15 nM on Fe 2 O 3 nanoparticles decorated reduced graphene oxide nanosheets, 38 but lower than 46 nM on graphene oxide supported gold nanoclusters, 39 37 nM graphene oxide-silver nanocomposite, 40 200 nM on gold nanoparticles-sulfonated graphene, 41 250 nM on gold nanoparticle/graphene/chitosan, 42 and 0.2 mM on polyaniline/graphene/ferrocenecarboxylic acid composite 43 ) but also for the detection of sulfite. 42,44 The reproducibility of measuring 5.0 nM lead ions with GNP-Cl as well as 1.5 μM nitrite ions and 25 μM sulfite ions with GNP-NH 2 was checked via monitoring once with five freshly prepared electrodes or measuring five times with one electrode.…”

Fabrication of Polyaniline-Zr(IV) Molybdophosphate as a Nanocomposite and its Potential Applications

“…The composite material with its outstanding properties is the result of the contribution of two or more materials with dissimilar properties [11,12]. Most of the studies reported the utilization the composite material as electrometric sensors [13][14][15][16][17]. Among various conducting polymers [18][19][20] polyaniline is a suitable candidate because of its various technological applications [21][22][23][24].…”