المؤلف | Hezam A. |
المؤلف | Namratha K. |
المؤلف | Drmosh Q.A. |
المؤلف | Ponnamma D. |
المؤلف | Nagi Saeed A.M. |
المؤلف | Ganesh V. |
المؤلف | Neppolian B. |
المؤلف | Byrappa K. |
تاريخ الإتاحة | 2022-05-31T19:01:10Z |
تاريخ النشر | 2018 |
اسم المنشور | Journal of Materials Chemistry A |
المصدر | Scopus |
المعرّف | http://dx.doi.org/10.1039/c8ta08033j |
معرّف المصادر الموحد | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056125912&doi=http://dx.doi.org/10.1039%2fc8ta08033j&partnerID=40&md5=d89ee4a22a7e4af7b2e45b66ca204fd1 |
معرّف المصادر الموحد | http://hdl.handle.net/10576/31738 |
الملخص | In this work, a direct Z-scheme Cs2O-Bi2O3-ZnO heterostructure without any electron mediator is fabricated by a simple solution combustion route. Cs2O is chosen as a sensitizer to expand the light absorption range, and in addition, its conduction band minimum (CBM) and valence band maximum (VBM) positions are suitable to construct a direct Z-scheme system with ZnO and Bi2O3. Structural and elemental analyses show clear evidence for heterostructure formation. The Z-scheme charge carrier migration pathway in Cs2O-Bi2O3-ZnO is confirmed by high resolution XPS and ESR studies. The fabricated heterostructure exhibits a good ability to split water to H2 and O2 under simulated sunlight irradiation without any sacrificial agents or co-catalysts and has excellent photostability. The apparent quantum efficiency of the optimized Cs2O-Bi2O3-ZnO heterostructure reaches up to 0.92% at 420 nm. The excellent efficiency of this fabricated heterostructure is attributed to the efficient charge carrier separation, the high redox potential of the CBM and VBM benefiting from a direct Z-scheme charge carrier migration pathway and the extended light absorption range. |
اللغة | en |
الناشر | Royal Society of Chemistry |
الموضوع | photocatalytic
|
العنوان | Direct Z-scheme Cs2O-Bi2O3-ZnO heterostructures for photocatalytic overall water splitting |
النوع | Article |
الصفحات | 21379-21388 |
رقم العدد | 43 |
رقم المجلد | 6 |
dc.accessType
| Abstract Only |