Effect of La-doped scheelite-type SrWO4 for photocatalytic H2 production
- 65 Downloads
In this paper, we present a systematic investigation of the photocatalytic H2 production over the Sr1−1.5xLaxWO4 (0 ≤ x ≤ 0.2) solid solutions. The doped La3+ ion in the crystal structure was identified by the Le Bail fit on the X-ray diffraction pattern of the as-prepared sample. The cell volume of the doped sample was linearly decreased by the augmentation of the La3+ ion. The morphology and composition of Sr0.82La0.12WO4 were observed by the transmission electron microscope, scanning electron microscope, and X-ray photoelectron spectroscopy. And then the loading of Cu, Ag, Au, Pt, Ni, and Ru as cocatalysts on sub-crystallite Sr0.82La0.12WO4 sample for H2 production was studied. The optimum H2 production rate is 309.7 μmol/h/g for 1.5 wt% Ru/Sr0.82La0.12WO4, which is 3.1 times than the undoped sample. And its apparent quantum yield is 0.44% at 365 (± 15) nm. All the photocatalysts recycled after the photocatalytic reactions show no degradation.
KeywordsSrWO4 Doping Photocatalysis H2 production Cocatalyst
This work was financially supported by the Science and Technology Project of Chongqing Municipal Education Commission (KJQN201801407) and Talent Introduction Project of Yangtze Normal University (2017KYQD22).
- 30.Murthy DHK, Matsuzaki H, Wang Q, Suzuki Y, Seki K, Hisatomi T, Yamada T, Kudo A, Domen K, Furube A (2019) Revealing the role of the Rh valence state, La doping level and Ru cocatalyst in determining the H2 evolution efficiency in doped SrTiO3 photocatalysts. Sustain Energ Fuels 3(1):208–218CrossRefGoogle Scholar