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Facile fabrication of novel red phosphorus-CdS composite photocatalysts for H2 evolution under visible light irradiation
- Source :
- International Journal of Hydrogen Energy. 41:5908-5915
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- Novel red phosphorus-CdS (P-CdS) composite photocatalysts were successfully prepared through a facile and fast precipitation method. The samples were then characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS) and photoluminescence emission spectroscopy (PL). The photocatalytic activity was evaluated by H2 generation in the aqueous solution containing Na2S/Na2SO3 as hole scavengers under visible light irradiation (λ ≥ 400 nm). The results show the optimal P molar ratio was 10 mol% and the corresponding H2 production rate reached 923 umol h−1 g−1, which is about 2.53 times higher than that of CdS sample. Meanwhile, the composite photocatalysts show favorable photostability. The enhanced photocatalytic activity can be attributed to the highly effective charge separation on P-CdS hybrids as confirmed by PL result. Also, a possible photocatalytic mechanism of the P-CdS composites is proposed and discussed in detail.
- Subjects :
- Aqueous solution
Materials science
Photoluminescence
Diffuse reflectance infrared fourier transform
Renewable Energy, Sustainability and the Environment
business.industry
Precipitation (chemistry)
Composite number
Energy Engineering and Power Technology
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Fuel Technology
Optics
X-ray photoelectron spectroscopy
Transmission electron microscopy
Photocatalysis
0210 nano-technology
business
Nuclear chemistry
Subjects
Details
- ISSN :
- 03603199
- Volume :
- 41
- Database :
- OpenAIRE
- Journal :
- International Journal of Hydrogen Energy
- Accession number :
- edsair.doi...........fb10817fbf0ebf8ab27c31149394d966