The Enhancement of H(2) Evolution over Sr(1−1.5x)Tb(x)WO(4) Solid Solution under Ultraviolet Light Irradiation

In this work, Sr(1−1.5x)Tb(x)WO(4) (0 ≤ x ≤ 0.2) solid solutions were synthesized via a traditional high-temperature solid state method. Le Bail fitting on the powder X-ray diffraction (XRD) pattern showed that these solid solutions are pure phase. Scanning electron microscopy showed that the SrWO(4...

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Detalles Bibliográficos
Autores principales: Yang, Jia, Sun, Xiaorui, Zeng, Ting, Hu, Yilan, Shi, Jianwei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539802/
https://www.ncbi.nlm.nih.gov/pubmed/31071913
http://dx.doi.org/10.3390/ma12091487
Descripción
Sumario:In this work, Sr(1−1.5x)Tb(x)WO(4) (0 ≤ x ≤ 0.2) solid solutions were synthesized via a traditional high-temperature solid state method. Le Bail fitting on the powder X-ray diffraction (XRD) pattern showed that these solid solutions are pure phase. Scanning electron microscopy showed that the SrWO(4) and Sr(0.82)Tb(0.12)WO(4) samples are composed of micrometer particles and submicron crystallites, respectively. Ultraviolet–visible diffuse reflectance spectra suggested that the bandgaps of Sr(1−1.5x)Tb(x)WO(4) are narrower than the undoped sample. The Sr(0.82)Tb(0.12)WO(4) sample, with the assistance of 1.5 wt % Ru-cocatalyst, exhibits the best performance for H(2) evolution in 5 vol % aqueous triethanolamine (TEOA), which results in about 6.1 and 2.8 times efficiency improvement compared with the intrinsic SrWO(4) in methanol and aqueous TEOA, respectively. All the photocatalysts recycled after the photocatalytic reactions showed no degradation when checked by powder XRD.

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