Novel Aminosilane (APTES)-Grafted Polyaniline@Graphene Oxide (PANI-GO) Nanocomposite for Electrochemical Sensor

Abstract

Lead is a potentially toxic element (PTE) that has several adverse medical effects in humans. Its presence in the environment became prominent due to anthropogenic activities. The current study explores the use of newly developed composite materials (organic–inorganic hybrid) based on PANI-GO-APTES for electrochemical detection of Pb2+ in aqueous solution. The composite material (PANI-GO-APTES) was synthesized by chemical method and was characterized with SEM, XPS, XEDS, XRD, TGA, FTIR, EIS and CV. The result of characterization indicates the successful synthesis of the intended material. The PANI-GO-APTES was successfully applied for electrochemical detection of Pb2+ using cyclic voltammetry and linear sweep voltammetry method. The limit of detection of Pb2+ was 0.0053 µM in the linear range of 0.01 µM to 0.4 µM. The current response produced during the electrochemical reduction of Pb2+ catalyzed by PANI-GO-APTES was also very repeatable, reproducible and rapid. The application of PANI-GO-APTES-modified GCE in real sample analysis was also established. Therefore, PANI-GO-APTES is presented as a potential Pb2+ sensor for environmental and human health safety.

Synthesis and Characterization of Some Graphene Oxide Powders Used as Additives in Hydraulic Mortars

“…In the GO spectrum, one could observe a large absorption band with three peaks at and at 2854 cm −1 corresponding to the C-H stretching vibrations [19]. In the GO-APTES spectrum there is also a large absorption band with one peak at 2933 cm −1 that can be assigned to the C-H bond vibration from the CH 2 or CH 3 group [20] The smaller peak at 2360 cm −1 can be attributed to the stretching vibration of the C-H bond [21].…”

“…In the GO spectrum, one could observe a large absorption band with three peaks at 3338 cm −1 and 3197 cm −1 assigned to the stretching vibration of the C-H and O-H bnd [18] and at 2854 cm −1 corresponding to the C-H stretching vibrations [19]. In the GO-APTES spectrum there is also a large absorption band with one peak at 2933 cm −1 that can be assigned to the C-H bond vibration from the CH2 or CH3 group [20] The smaller peak at 2360 cm −1 can be attributed to the stretching vibration of the C-H bond [21]. In the GO spectrum, one could observe a large absorption band with three peaks at and at 2854 cm −1 corresponding to the C-H stretching vibrations [19].…”

Chronoampermetric detection of enzymatic glucose sensor based on doped polyindole/MWCNT composites modified onto screen-printed carbon electrode as portable sensing device for diabetes

“…This result suggests the surface controlled redox reaction occurred. 61,62 3.7 Reproducibility, repeatability, stability, and selectivity of glucose sensor…”

Conductive Polymer/Graphene‐based Composites for Next Generation Energy Storage and Sensing Applications

“…Composites have shown increased applicability in the electrochemical sensing of different molecules owing to their multifunctionality and synergistic effect between their pure counterparts [83] . Recently, CP–graphene‐based materials have emerged as one of the most promising composites applied in the detection of various molecules such as neurotransmitters, molecules present in the human body (e. g., glucose, uric acid (UA), and AA), a wide range of ions, environmental pollutants, pesticides, and drugs [84–91] …”

“…[83] Recently, CP-graphene-based materials have emerged as one of the most promising composites applied in the detection of various molecules such as neurotransmitters, molecules present in the human body (e. g., glucose, uric acid (UA), and AA), a wide range of ions, environmental pollutants, pesticides, and drugs. [84][85][86][87][88][89][90][91] The main role of graphene-based materials in electrochemical detection systems is to improve electrical conductivity and provide active sites accessible to the analytes. Among graphene-based materials, rGO with reduced oxygen content has been widely applied.…”