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Jianhua Ge,Jing Xu,Yujie Liu,Long Zhang,Lan Wang,Dehan Wu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.11
Nitrogen photo fixation mediated by various photocatalysts has received extensive concerns in recent years. In this work, a general strategy is proposed to enhance nitrogen photo fixation performance with some W18O49-based photocatalysts under visible-light irradiation. A series of photocatalysts were successfully synthesized in the presence of some noble-metal-free transition metals (Fe, Co and Ni) to modify the urchin-like W18O49. The resulting photocatalysts were systematically characterized using XRD, SEM, EDS, XPS, PL, N2 adsorption–desorption isotherms, and DRS. Structural characterization of the photocatalysts revealed that the crystal morphology features were preserved, optional harvesting properties were enhanced, BET specific surface area was extended, and migration efficiency of the photo-induced charge carriers was significantly improved in the modified-W18O49 materials. Therefore, a progressed nitrogen photo fixation performance was observed. The maximum production of NH4 + was approximately reached to 2752 μg · g -1 catal. under the optimum reaction conditions. Furthermore, a plausible nitrogen photo fixation mechanism in the presence of the synthesized composites is also proposed.