Application of ZnO-NRs@Ni-foam substrate for electrochemical fingerprint of arsenic detection in water.

Autor:	Rauf M; Department of Physics, Abdul Wali Khan University Mardan 23200 Mardan Khyber Pakhtunkhwa Pakistan khizar3@awkum.edu.pk saidkarim@awkum.edu.pk., Shah SK; Department of Physics, Abdul Wali Khan University Mardan 23200 Mardan Khyber Pakhtunkhwa Pakistan khizar3@awkum.edu.pk saidkarim@awkum.edu.pk., Algahtani A; Mechanical Engineering Department, College of Engineering, King Khalid University Abha 61421 Asir Kingdom of Saudi Arabia.; Research Center for Advanced Materials Science (RCAMS), King Khalid University Guraiger, PO Box 9004 Abha 61413 Asir Kingdom of Saudi Arabia., Tirth V; Mechanical Engineering Department, College of Engineering, King Khalid University Abha 61421 Asir Kingdom of Saudi Arabia.; Research Center for Advanced Materials Science (RCAMS), King Khalid University Guraiger, PO Box 9004 Abha 61413 Asir Kingdom of Saudi Arabia., Alghtani AH; Department of Mechanical Engineering, College of Engineering, Taif University PO Box 11099 Taif 21944 Kingdom of Saudi Arabia., Al-Mughanam T; Department of Mechanical Engineering, College of Engineering, King Faisal University PO Box 380 Al-Ahsa 31982 Kingdom of Saudi Arabia., Hayat K; Department of Physics, Abdul Wali Khan University Mardan 23200 Mardan Khyber Pakhtunkhwa Pakistan khizar3@awkum.edu.pk saidkarim@awkum.edu.pk., Al-Shaalan NH; Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University PO Box 84428 Riyadh 11671 Saudi Arabia., Alharthi S; Department of Chemistry, College of Science, Taif University PO Box 11099 Taif 21944 Saudi Arabia.; Center of Advanced Research in Science and Technology, Taif University PO Box 11099 Taif 21944 Saudi Arabia., Alharthy SA; Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University PO Box 80216 Jeddah 21589 Saudi Arabia.; King Fahd Medical Research Center, King Abdulaziz University PO Box 80216 Jeddah 21589 Saudi Arabia., Amin MA; Department of Chemistry, College of Science, Taif University PO Box 11099 Taif 21944 Saudi Arabia.
Jazyk:	angličtina
Zdroj:	RSC advances [RSC Adv] 2023 May 12; Vol. 13 (21), pp. 14530-14538. Date of Electronic Publication: 2023 May 12 (Print Publication: 2023).
DOI:	10.1039/d3ra01574b
Abstrakt:	Arsenic (As 3+ ) is the most carcinogenic and abundantly available heavy metal present in the environment. Vertically aligned ZnO nanorod (ZnO-NR) growth was achieved on metallic nickel foam substrate via a wet chemical route and it was used as an electrochemical sensor towards As(iii) detection in polluted water. Crystal structure confirmation, surface morphology observation and elemental analysis of ZnO-NRs were conducted using X-ray diffraction, field-emission scanning electron microscopy and energy-dispersive X-ray spectroscopy, respectively. Electrochemical sensing performance of ZnO-NRs@Ni-foam electrode/substrate was investigated via linear sweep voltammetry, cyclic voltammetry and electrochemical impedance spectroscopy in a carbonate buffer solution of pH = 9 and at different As(iii) molar concentrations in solution. Under optimum conditions, the anodic peak current was found proportional to the arsenite concentration from 0.1 μM to 1.0 μM. The achieved values for limit of detection and limit of quantification were 0.046 ppm and 0.14 ppm, respectively, which are far lower than the recommended limits for As(iii) detection in drinking water as suggested by the World Health Organization. This suggests that ZnO-NRs@Ni-foam electrode/substrate can be effectively utilized in terms of its electrocatalytic activity towards As 3+ detection in drinking water. Competing Interests: The authors declare no conflict of interest. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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