A new CaWO4/alkali-activated blast furnace slag-based cementitious composite for production of hydrogen
| Autor: | Meng Yang Yang, Le Kang, Zhang Li, Zhang Ke, Yao Jun Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Hydrogen Renewable Energy Sustainability and the Environment Metallurgy Composite number Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Fuel Technology chemistry Chemical engineering Ground granulated blast-furnace slag Photocatalysis Water splitting Calcium silicate hydrate 0210 nano-technology Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 42:3690-3697 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2016.07.173 |
| Popis: | A novel CaWO4/alkali-activated blast furnace slag-based cementitious composite (ASCC) was synthesized and used as an excellent photocatalyst for production of hydrogen by water splitting. XRF, XRD, BET, UV–vis DRS and PL were used to characterize the component, microstructure and optical properties of CaWO4/ASCC. The XRD results showed that the CaWO4/ASCC composite was composed of the matrix of calcium silicate hydrate (CSH) and the active phase of CaWO4 with mean particle size of 11.5 nm. The UV–vis DRS absorption band was red-shifted with the increase of loading amount of CaWO4. The 5CaWO4/ASCC composite exhibited the highest amount of hydrogen production of 50827 μL/g under simulated solar irradiation for 6 h. As comparison with NH4+/ASCC, The excellent photocatalytic activity of 5CaWO4/ASCC composite was attributed to the synergistic effect of the active components of CaWO4, TiO2 and the matrix of CSH. A mechanism of generation H2 was suggested in the paper. |
| Databáze: | OpenAIRE |
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