TY - JOUR
T1 - In situ immobilization of CuO on SiO2/graphite matrix, modified with benzimidazolium-1-acatate ionic liquid
T2 - Application as catechol sensor
AU - Khalid, Bilal
AU - Rahim, Abdur
AU - Gilani, Mazhar Amjad
AU - Muhammad, Nawshad
AU - Younus, Abdur Rehman
AU - Tabassum, Sobia
AU - Iqbal, Jibran
AU - Alharthi, Abdulrahman I.
N1 - Publisher Copyright:
© 2017
PY - 2018/2
Y1 - 2018/2
N2 - Carbon ceramic material (SiO2/C) was prepared using the sol-gel technique. Copper oxide was in situ synthesized on the pores of the matrix, to ensure homogenous distribution of the electroactive species in the matrix pores. To enhance the conductivity of material, the SiO2/C/CuO was modified with benzimidazolium-1-acetate ionic liquid. The surface area (SBET 432.56 m2/g) and pore volume (0.90 cm3/g) of the material were calculated from BET analysis. SEM images showed compactness of materials, having no phase segregation within the magnification used. The structure of ionic liquid was confirmed using NMR and FTIR analysis. The electrodes as a pressed disk fabricated from SiO2/C, SiO2/C/CuO, and SiO2/C/CuO/IL materials were tested as an electrochemical sensor for catechol determination. Electrochemical impedance spectroscopy has revealed that the SiO2/C/CuO/IL-based sensor assists the charge transfer owing to electron rich density, resonance, and conductance of ionic liquid structural moiety. SiO2/C/CuO/IL electrode exhibits excellent sensitivity, linear response range and low limit of detection (LOD) of 712 μA μmol− 1 dm3 cm− 2, 0.2 mM–10 mM and 0.7 × 10− 8 mol L− 1, respectively. The sensor was also tested for the determination of catechol in real samples and gives very good results for its determination.
AB - Carbon ceramic material (SiO2/C) was prepared using the sol-gel technique. Copper oxide was in situ synthesized on the pores of the matrix, to ensure homogenous distribution of the electroactive species in the matrix pores. To enhance the conductivity of material, the SiO2/C/CuO was modified with benzimidazolium-1-acetate ionic liquid. The surface area (SBET 432.56 m2/g) and pore volume (0.90 cm3/g) of the material were calculated from BET analysis. SEM images showed compactness of materials, having no phase segregation within the magnification used. The structure of ionic liquid was confirmed using NMR and FTIR analysis. The electrodes as a pressed disk fabricated from SiO2/C, SiO2/C/CuO, and SiO2/C/CuO/IL materials were tested as an electrochemical sensor for catechol determination. Electrochemical impedance spectroscopy has revealed that the SiO2/C/CuO/IL-based sensor assists the charge transfer owing to electron rich density, resonance, and conductance of ionic liquid structural moiety. SiO2/C/CuO/IL electrode exhibits excellent sensitivity, linear response range and low limit of detection (LOD) of 712 μA μmol− 1 dm3 cm− 2, 0.2 mM–10 mM and 0.7 × 10− 8 mol L− 1, respectively. The sensor was also tested for the determination of catechol in real samples and gives very good results for its determination.
KW - Benzimidazolium-1-acatate
KW - Carbon ceramic materials
KW - Catechol
KW - Sensor
KW - Sol-gel
UR - http://www.scopus.com/inward/record.url?scp=85039434016&partnerID=8YFLogxK
U2 - 10.1016/j.molliq.2017.12.109
DO - 10.1016/j.molliq.2017.12.109
M3 - Article
AN - SCOPUS:85039434016
SN - 0167-7322
VL - 251
SP - 450
EP - 457
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
ER -