Tarek, Mostafa and Atta, Mahmoud and Muhd Zahiruddin, Shukor and Hamidah, Abdullah and Khan, Md Maksudur Rahman (2023) Highly effective B@g-C3N4/polyaniline nanoblend for photoelectrocatalytic reduction of CO2 to methanol. Chemical Engineering and Technology, 46 (12). 2661 -2669. ISSN 0930-7516. (Published)
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Abstract
Photoelectrocatalytic (PEC) conversion of CO2 has been extensively investigated as it uses solar energy to combine CO2 and water to produce hydrocarbons. In the present work, B@graphitic carbon nitride (g-C3N4)/polyaniline (PANI) nanoblend was synthesized by in situ polymerization of aniline in the presence of B@g-C3N4 for PEC CO2 reduction. The catalyst was characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy, X-ray diffraction, UV-Vis absorption spectroscopy, photoluminescence, X-ray photoelectron spectroscopy (XPS), and Mott-Schottky analysis. The PEC activity was evaluated by linear sweep voltammetry (LSV) and chronoamperometry. XRD revealed the formation of g-C3N4, while B doping was confirmed by XPS. The presence of PANI was visualized by FESEM. A remarkable cathodic current associated with CO2 reduction was observed during LSV from an onset potential of –0.01 V vs. normal hydrogen electrode (NHE), which is more positive than that of B@g-C3N4 (–0.82 V vs. NHE), and the positive shift is attributed to the slow charge recombination kinetics of B@g-C3N4/PANI as evidenced by PL results. The mechanism of PEC CO2 reduction was investigated and discussed on the basis of the Mott-Schottky results. In conclusion, B@g-C3N4/PANI opens a new avenue to develop photoelectrocatalysts for PEC CO2 reduction to methanol.
| Item Type: | Article |
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| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Carbon dioxide reduction; Graphitic carbon nitride; Nanoblend; Photocatalyst; Photoelectrocatalysis |
| Subjects: | T Technology > TP Chemical technology |
| Faculty/Division: | Institute of Postgraduate Studies Faculty of Chemical and Process Engineering Technology |
| Depositing User: | Mrs Norsaini Abdul Samat |
| Date Deposited: | 14 Feb 2024 06:23 |
| Last Modified: | 14 Feb 2024 06:23 |
| URI: | http://umpir.ump.edu.my/id/eprint/40349 |
| Download Statistic: | View Download Statistics |
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