期刊
SCIENTIFIC REPORTS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-017-14111-7
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资金
- National Plan for Science, Technology, and Innovation (MAARIFAH) - King Abdulaziz City for Science and Technology - through the Science and Technology unit at the King Fahd University of Petroleum and Minerals (KFUPM) - the Kingdom of Saudi Arabia [13-NAN16-0004]
We report the morphological and size tailored rational and facile synthesis of copper vanadate nanostructures via sonication assisted sol gel method. Field emission scanning electron microscopy (FESEM), indicated irregular and nanoflakes morphologies for the as synthesized copper vanadate (CV-120) and copper vanadate calcined at 250 degrees C (CV-250). The semispherical platelets shaped morphology revealed for the copper vanadate calcined at 550 degrees C (CV-500). The XRD patterns confirm the monoclinic and triclinic crystal phases for CV-250 and CV-500, respectively. The optical properties of CV-250 and CV-500 via UV-DRS showed significant absorption in the visible regime at lambda = 565 nm and 670 nm with band gap 2.2 eV and 1.84 eV, respectively as calculated from Kubelka-Munk (KM) equation via Tauc's plot. The values of band edge positions of CV-250 and CV-550 straddle with the hydrogen (HER) and oxygen evolution reaction (OER) potentials. The photoelectrodes of CV-250 and CV-500 fabricated by adsorption desorption method to test their photoelectrochemical (PEC) water splitting performance in the three-electrode cell. The onset photocurrent potential is observed at similar to 0.42 V, which reached to saturation at 1.05 V. The photocurrent density at saturation is similar to 0.65 mA/cm(2) for CV-250 and CV-500, respectively.
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