Dina F Katowah1,2, Gharam I Mohammed2, Dyab A Al-Eryani1,3, Tariq R Sobahi1, Mahmoud A Hussein1,4. 1. Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia. 2. Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia. 3. Department of Chemistry, Faculty of Applied Science, Thamar University, Dhamar, Yemen. 4. Chemistry Department, Polymer Chemistry Laboratory, Faculty of Science, Assiut University, Assiut, Egypt.
Abstract
Nanocomposites (NCs) of crosslinked polyaniline (CPA)-coated oxidized carbon nanomaterials (OXCNMs) were fabricated as a very sensitive and simple electrochemical sensor to be utilized in 2,4-dichlorophenol (2,4-DCPH) detection. CPA/OXCNMs NCs were prepared by chemical copolymerization of polyaniline with triphenylamine and p-phenylenediamine in the presence of OXCNMs. The CPA/GO-OXSWCNTNCs exhibited a higher affinity for the oxidation of chlorophenols compared to the glassy carbon electrode (GCE), CPA/GCE, and other NCs. Cyclic voltammetry was performed to investigate and assess the electrocatalytic oxidation of 2,4-DCPH on the modified GCE. The compound yielded a well-defined voltammetric response in a Britton-Robinson buffer (pH 5) at 0.54 V (vs. silver chloride electrode). Quantitative determination of 2,4-DCPH was performed by differential pulse voltammetry under optimal conditions in the concentration range of 0.05 to 1.2 nmol L-1, and a linear calibration graph was obtained. The detection limit (S/N = 3) was found to be 4.2 nmol L-1. In addition, the results demonstrated that the CPA/GO-OXSWCNTs/GCE sensor exhibited a strong anti-interference ability, reproducibility, and stability. The prepared CPA/GO-OXSWCNTs/GCE sensor was used to rapidly detect 2,4-DCPH with a high degree of sensitivity in fish farm water with proven levels of satisfactory recoveries.
Nanocomposites (NCs) of crosslinked polyaniline (n class="Chemical">CPA)-coated oxidized carbon nanomaterials (OXCNMs) were fabricated as a very sensitive and simple electrochemical sensor to be utilized in 2,4-dichlorophenol (2,4-DCPH) detection. CPA/OXCNMs NCs were prepared by chemical copolymerization of polyaniline with triphenylamine and p-phenylenediamine in the presence of OXCNMs. The CPA/GO-OXSWCNTNCs exhibited a higher affinity for the oxidation of chlorophenols compared to the glassy carbon electrode (GCE), CPA/GCE, and other NCs. Cyclic voltammetry was performed to investigate and assess the electrocatalytic oxidation of 2,4-DCPH on the modified GCE. The compound yielded a well-defined voltammetric response in a Britton-Robinson buffer (pH 5) at 0.54 V (vs. silver chloride electrode). Quantitative determination of 2,4-DCPH was performed by differential pulse voltammetry under optimal conditions in the concentration range of 0.05 to 1.2 nmol L-1, and a linear calibration graph was obtained. The detection limit (S/N = 3) was found to be 4.2 nmol L-1. In addition, the results demonstrated that the CPA/GO-OXSWCNTs/GCE sensor exhibited a strong anti-interference ability, reproducibility, and stability. The prepared CPA/GO-OXSWCNTs/GCE sensor was used to rapidly detect 2,4-DCPH with a high degree of sensitivity in fish farm water with proven levels of satisfactory recoveries.
Authors: Manh B Nguyen; Vu Thi Hong Nhung; Vu Thi Thu; Dau Thi Ngoc Nga; Thuan Nguyen Pham Truong; Hoang Truong Giang; Pham Thi Hai Yen; Pham Hong Phong; Tuan A Vu; Vu Thi Thu Ha Journal: RSC Adv Date: 2020-11-19 Impact factor: 4.036
Authors: Dina F Katowah; Sayed M Saleh; Sara A Alqarni; Reham Ali; Gharam I Mohammed; Mahmoud A Hussein Journal: Sci Rep Date: 2021-03-03 Impact factor: 4.379