Construction of g-C3N4/BCN two-dimensional heterojunction photoanode for enhanced photoelectrochemical water splitting |
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| Affiliation: | 1. Department of Mathematics, Karnatak University, Pavate Nagar, Dharwad, 580003, India;2. Department of Computer Science (MCA), KLE Technological University, BVB Campus, Hubli, 580031, India;1. Clean Energy Research Lab (CERL), Department of Physics, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan;2. University of Education, Township, Lahore 54000, Pakistan;3. Sustainable Energy Technologies Center, King Saud University, Riyadh, Saudi Arabia;4. University of Okara, Okara, Pakistan;1. TÜB?TAK Marmara Research Centre Energy Institute, Kocaeli, Turkey;2. Istanbul Technical University, Mechanical Engineering Department, ?stanbul, Turkey;1. Sen Research Group, Department of Biochemistry, Faculty of Arts and Science, Dumlup?nar University, Evliya Çelebi Campus, 43100 Kütahya, Turkey;2. Department of Environmental Engineering, Faculty of Engineering, University of Igdir, Igdir, Turkey;3. Department of Chemistry, Bingöl University, 12400 Bingöl, Turkey;1. Laboratoire de Technologie des Matériaux, Faculté de Génie Mécanique et Génie des Procédés(USTHB), B.P.32, El-Alia, Algeria;2. Laboratory of Storage and Valorization of Renewable Energies Faculty of Chemistry (USTHB), B.P. 32, Alger, El-Alia Algeria |
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| Abstract: | Two-dimensional heterojunction g-C3N4/BCN was constructed via thermal polymerization process. The formed two-dimensional heterostructure could enhance the interfacial contact area between BCN and porous g-C3N4 as well as shorten the photogenerated charge carriers transfer time and distance. The two-dimensional g-C3N4/BCN heterojunction photoanode shows enhanced photoelectrochemical (PEC) performance for water splitting under visible-light irradiation, which primarily originates from the improved charge transfer and separation, and prolonged lifetime of electrons. Under the visible light irradiation, the g-C3N4/BCN heterojunction sample yields a photocurrent density of ～0.62 mA cm?2 at 1.23 V vs. RHE, which is about eight times as many as that of CN (0.08 mA cm?2) electrode at the same conditions. In addition, the possible electron transfer model and mechanism of PEC water splitting for H2 evolution have been discussed. |
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| Keywords: | BCN nanosheets Two-dimension heterojunction Charge transfer Photoelectrochemical performance |
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