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Ali Hassan Abdulrahman Bahkali

Professor

Faculty

كلية العلوم
Building 5 Floor 2 Office 2B 53
publication
Journal Article
2024

Alginic acid-functionalized silver nanoparticles: A rapid monitoring tool for detecting the technology-critical element tellurium

The increasing global demand for tellurium, driven by its critical role in alloys, photovoltaic devices, and electronics, has raised concerns about its environmental pollution and neurotoxicity. In response, the potential of alginic acid (AA), a renewable, low-cost, and sustainable biopolymer, was explored for the biosynthesis of ultra-small silver nanoparticles (AgNPs) and their application in the detection of tellurium (Te(IV)). The effect of key synthesis parameters on desired physicochemical properties and yield of AgNPs was established to ensure high specificity and sensitivity towards Te(IV). The purified AgNPs with AA surface ligands were utilized to demonstrate a ratiometric absorbance sensor that exhibits excellent linearity and nanomolar-level affinity. This approach achieved a high correlation coefficient of ∼ 0.982, with a low detection limit of about 22 nM. Further investigations into the effect of pH, ionic strength, and organic molecules were conducted to elucidate detection performance and molecular understanding. The detection mechanism relies on the coordination between Te(IV) ions and the carboxylate groups of AA, which initiates aggregation-induced plasmon coupling in adjacent AgNPs. The capability of this analytical method to monitor Te(IV) in real-world water samples features its rapidity, user-friendliness, and suitability for point-of-care monitoring, making it a promising alternative to more complex techniques.

Publisher Name
Elsevier Journal of Hazardous Materials
Volume Number
465
Pages
133161
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Published in:
Elsevier Journal of Hazardous Materials
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Published in:
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In the current research un-doped and Fe-doped ZnS nanocrystals (Zn1−xFexS (x = 0.0–0.08) were synthesized by wet chemical method. The synthesized nanocrystals were characterized by X-ray…

by Iqra Shakoor, Uzma Jabeen, Iqbal Ahmad, Saba Riaz, Muhammad Tayyab, Asad Syed, Ali H Bahkali, Musarat Riaz, Rustem R Zairov, Muhammad Nadeem Zafar
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Published in:
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