Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7842593 | Journal of Molecular Liquids | 2018 | 11 Pages |
Abstract
Here, a novel coated composite, Er3+:YAlO3/Ta2O5/rGO/MoSe2, was successfully prepared by sol-hydrothermal and calcination methods, in which the MoSe2 and reduced graphene oxide (rGO) hybrids as co-catalyst were used to act as the electron collector and active reaction sites. Er3+:YAlO3, MoSe2/rGO, Er3+:YAlO3/Ta2O5 and Er3+:YAlO3/Ta2O5/rGO/MoSe2 were all characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), Raman spectrum, UV-vis diffuse reflectance spectra (DRS) and transmission electron microscopy (TEM). UV-vis absorption and photoluminescence (PL) spectra of Er3+:YAlO3 were also measured. The photocatalytic hydrogen production activity of Er3+:YAlO3/Ta2O5/rGO/MoSe2 was examined under visible-light irradiation. The main influence factors such as initial solution pH and mass ratio of Ta2O5 and MoSe2/rGO on visible-light photocatalytic hydrogen production activity of Er3+:YAlO3/Ta2O5/rGO/MoSe2 were discussed in detail. The results showed that the coated composite (Er3+:YAlO3/Ta2O5/rGO/MoSe2) with 99.25:0.75 mass ratio of Ta2O5 and MoSe2/rGO in methanol aqueous solution at pHÂ =Â 6.00 could display the highest photocatalytic hydrogen production activity. Furthermore, a high level of photocatalytic activity can be still maintained within five cycles under the same conditions. It implies that the novel coated composite, Er3+:YAlO3/Ta2O5/rGO/MoSe2, may be a promising photocatalyst utilizing solar energy for hydrogen production.
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Authors
Guowei Wang, Xue Ma, Chunquan Wang, Siyi Li, Jing Qiao, Hongbo Zhang, Guanshu Li, Jun Wang, Youtao Song,