Morphology control and phase transformation of ZIS/TiO2 into CdSe(en)0.5/CIS/TiO2 photoanode for enhanced solar hydrogen generation
| Autor: | Ruturaj P. Patil, Jum Suk Jang, Ho-Sub Bae, Weon-Sik Chae, Mahadeo A. Mahadik, Jungho Ryu |
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| Rok vydání: | 2020 |
| Předmět: |
Photocurrent
Materials science Hydrogen General Chemical Engineering chemistry.chemical_element Heterojunction Ethylenediamine 02 engineering and technology General Chemistry Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Phase (matter) Environmental Chemistry Cadmium nitrate Charge carrier 0210 nano-technology |
| Zdroj: | Chemical Engineering Journal. 385:123871 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2019.123871 |
| Popis: | An inorganic–organic CdSe(en)0.5/CdIn2S4/TiO2 complex heterostructure was successfully synthesized using a facile solvothermal method. The morphology of a CdSe(en)0.5/CdIn2S4/TiO2 heterostructure was controlled by varying the concentrations of cadmium nitrate and selenium precursors in ethylenediamine. Intentionally controlling the morphology enhances the absorption within the visible region compared to a ZnIn2S4/TiO2 photoanode. The photoelectrochemical (PEC) study shows that the CdSe(en)0.5/CdIn2S4/TiO2 photoanode complex heterostructure exhibits a photocurrent density of 2.43 mA cm−2 at 0 V versus Ag/AgCl, which is 180% higher than that of a ZnIn2S4/TiO2 photoanode. The extra-delayed lifetime and photostability of CdSe(en)0.5/CdIn2S4/TiO2 complex heterojunction is cause of efficient hole scavenging. During the PEC measurement, the Se and ethylenediamine leaches out into the electrolyte while S2− from the Na2S + Na2SO3 electrolyte reacts with surface of the CdSe(en)0.5/CdIn2S4/TiO2 complex heterojunction. Such structure can effectively separate the charge carrier and yields 100 µmol of hydrogen within 3 h. The possible charge transfer mechanism during solar hydrogen generation in an inorganic–organic CdSe(en)0.5/CdIn2S4/TiO2 complex heterojunction structure has also been proposed. |
| Databáze: | OpenAIRE |
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