Highly sensitive and selective detection of Bis-phenol A based on hydroxyapatite decorated reduced graphene oxide nanocomposites

Mohammad K. Alam, Mohammed M. Rahman, Amir Elzwawy, Sri Ramulu Torati, Mohammad S. Islam, Mitsugu Todo, Abdullah M. Asiri, Dojin Kim, Cheol Gi Kim

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A facile and cost effective chemical reduction method is employed for the preparation of reduced graphene oxide/hydroxyapatite (rGO/HAp) nanocomposites. The transmission electron microscopy images revealed that the HAp flakes are well decorated on the surface of rGO. The morphological structure of the as-synthesized rGO/HAp nanocomposites was confirmed through X-ray diffraction, Fourier transform infrared spectroscopy and Raman spectroscopy, while the composition and thermal stability were analyzed by energy dispersive spectra and thermogravimetric analysis, respectively. Furthermore, the effect of rGO/HAp nanocomposites for the proliferation of Human Mesenchymal Stem Cell (hMSC) was performed to confirm the biocompatibility. A selective chemical sensor based on rGO/HAp modified glassy carbon electrode (GCE) for sensitive detection of Bis-phenol A (BPA) has been developed. Several important parameters controlling the performance of the BPA chemi-sensor were investigated and optimized at room conditions. The rGO/HAp/Nafion/GCE sensor offers a fast response and highly sensitive BPA detection. Under the optimal conditions, a linear range from 0.2 nmol L−1 to 2.0 mmol L−1 for the detection of BPA was observed with the detection limit of 60.0 pmol L−1 (signal-to-noise ratio, at an SNR of 3) and sensitivity of 18.98 × 104 μA.L/μmol.m2. Meanwhile, the fabricated chemi-sensor showed an excellent, specific and selective recognition to target BPA molecules among coexistence of other analytes in the buffer system. This novel effort initiated a well-organized way of efficient rGO/HAp/Nafion/GCE sensor development and practically analyzed the real hazardous environmental pollutants at room conditions.

Original languageEnglish
Pages (from-to)353-361
Number of pages9
JournalElectrochimica Acta
Volume241
DOIs
Publication statusPublished - Jul 1 2017

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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