Abstract
A multi-functional hybrid of cellulose acetate with cadmium sulfide and Methylene blue (CA/CdS/MB) in a bead composition was synthesized and investigated as a photosensor-adsorbent for the rapid, selective, and sensitive detection, and adsorption of Cu(II) ions. These hybrid CA-modified beads are composed of multiple adsorption active sites and possess a surface area of 58 cm2 g−1. They are an efficient adsorbent with a maximum adsorption capacity of 0.57 mg g−1. Photoelectrochemical (PEC) detection of Cu(II) was accomplished by modifying the beads on a glassy carbon electrode. The beads containing 20 mmol of sulfur displayed the widest linear analytical range (0.1–290 nM) and the lowest detection limit (16.9 nM) for Cu(II) with high selectivity and reliable reproducibility. The successful application of the beads has provided a new insight for the selection of a responsive photoactive material for a PEC assay, as well as an effective adsorbent material for Cu(II) ions.
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The research work was supported by FRGS MRSA (UPM/700-2/1/FRGS/MRSA/5524986) from the Ministry of Education of Malaysia.
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Ibrahim, I., Lim, H.N. & Huang, N.M. Cellulose acetate beads modified with cadmium sulfide and Methylene blue for adsorbent-assisted photoelectrochemical detection of copper(II) ions. Microchim Acta 186, 452 (2019). https://doi.org/10.1007/s00604-019-3547-x
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DOI: https://doi.org/10.1007/s00604-019-3547-x