Preparation of Nanosized Ni²⁺-Doped ErFeO₃ by Microwave Assisted Process and its Visible-Light Photocatalytic Activity

Abstract:

Using Er (NO₃)₃·6H₂O, Fe (NO₃)₃·9H₂O, Ni (NO₃)₃·6H₂O as main raw materials, the nanosized Ni²⁺-doped ErFeO₃ was prepared by microwave assisted method. The Ni²⁺-doped ErFeO₃ samples were characterized by thermogravimetry and differential thermal analysis (TG-DTA), powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-visible diffuse reflectance spectroscopy (DRS). The different doping amount was studied for photocatalytic properties of samples. The results show that the Ni²⁺-doped ErFeO₃ is perovskite structure (ABO₃), and its average grain size is nearly 80nm. Under the visible-light, using the methyl-orange as simulate sewages, the Ni²⁺-doped ErFeO₃ has higher photocatalytic activity than pure ErFeO₃ powder, and the doping amount of 0.02 to ErFeO₃ is the best. When the illumination time of the visible light is 120 min, the degradation rate of the best ratio of the samples can rise to nearly 100% for the decomposition of methyl orange. Therefore, the nanosized Ni²⁺-doped ErFeO₃ is an excellent visible-light photocatalyst.

• Periodical: Key Engineering Materials (Volume 748)
• Pages: 418-422
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.748.418
• Online since: August 2017
• Authors: Li Fang, Qian Yang, Meng Ying Xu, Jun Wei Cao, Pei Song Tang*, Hai Feng Chen
• Keywords: ErFeO₃, Microwave Method, Nanosized Materials, Ni²⁺ Dope, Visible-Light Photocatalysis

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