Robust direct Z-scheme exciton transfer dynamics by architecting 3D BiOI MF-supported non-stoichiometric Cu 0.75 In 0.25 S NC nanocomposite for co-catalyst-free photocatalytic hydrogen evolution.

Autor: Prusty D; Centre for Nanoscience and Nanotechnology, SOA (Deemed to be University) Bhubaneswar-751030 Odisha India paridakulamani@yahoo.com kulamaniparida@soa.ac.in deeptimayee.prusty003@gmail.com smansingh908@gmail.com acharyalopamudra16@gmail.com lekhaparamanik05@gmail.com +91-6 74-2581637 +91-674-2379425 +91-9776645909., Mansingh S; Centre for Nanoscience and Nanotechnology, SOA (Deemed to be University) Bhubaneswar-751030 Odisha India paridakulamani@yahoo.com kulamaniparida@soa.ac.in deeptimayee.prusty003@gmail.com smansingh908@gmail.com acharyalopamudra16@gmail.com lekhaparamanik05@gmail.com +91-6 74-2581637 +91-674-2379425 +91-9776645909., Acharya L; Centre for Nanoscience and Nanotechnology, SOA (Deemed to be University) Bhubaneswar-751030 Odisha India paridakulamani@yahoo.com kulamaniparida@soa.ac.in deeptimayee.prusty003@gmail.com smansingh908@gmail.com acharyalopamudra16@gmail.com lekhaparamanik05@gmail.com +91-6 74-2581637 +91-674-2379425 +91-9776645909., Paramanik L; Centre for Nanoscience and Nanotechnology, SOA (Deemed to be University) Bhubaneswar-751030 Odisha India paridakulamani@yahoo.com kulamaniparida@soa.ac.in deeptimayee.prusty003@gmail.com smansingh908@gmail.com acharyalopamudra16@gmail.com lekhaparamanik05@gmail.com +91-6 74-2581637 +91-674-2379425 +91-9776645909., Parida KM; Centre for Nanoscience and Nanotechnology, SOA (Deemed to be University) Bhubaneswar-751030 Odisha India paridakulamani@yahoo.com kulamaniparida@soa.ac.in deeptimayee.prusty003@gmail.com smansingh908@gmail.com acharyalopamudra16@gmail.com lekhaparamanik05@gmail.com +91-6 74-2581637 +91-674-2379425 +91-9776645909.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2022 Jan 05; Vol. 12 (3), pp. 1265-1277. Date of Electronic Publication: 2022 Jan 05 (Print Publication: 2022).
DOI: 10.1039/d1ra08004k
Abstrakt: Designing promising photocatalytic systems with wide photon absorption and better exciton separation ability is a cutting-edge technology for enhanced solar-light-driven hydrogen production. In this context, non-stoichiometric Cu 0.75 In 0.25 S nanocrystals (CIS NCs) coupled with three-dimensional (3D) BiOI micro-flowers (BOI MFs) were synthesized through an ultra-sonication strategy forming a CIS-BOI heterojunction, which was well supported by XRD, photocurrent, XPS and Mott-Schottky analyses. Further, the co-catalyst-free CIS-BOI binary hybrid shows improved hydrogen evolution, i.e. , 588.72 μmol h -1 , which is 3.2 times greater than the pristine CIS NC (183.97 μmol h -1 ). Additionally, the binary composite confers an apparent conversion efficiency (ACE) of 9.44% (8.90 × 10 16 number of H 2 molecule per sec), which is extensively attributed to the robust charge carrier separation and transfer efficiency via the direct Z-scheme mechanism (proved through superoxide and H 2 evolution activity). Moreover, the broad photon absorption range and productive exciton separation over the CIS-BOI composite are substantially justified by UV-Vis DRS, PL, EIS and photocurrent measurements.
Competing Interests: The authors declare no competing financial interest.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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