Ultrasonic Blending Synthesis of Ni(HNCN)2/BiVO4 Composite Visible-Light Induced Photocatalysts
Received date: 2020-02-25
Revised date: 2020-05-25
Online published: 2020-06-16
Supported by
National Natural Science Foundation of China(21501023);National Training Program of Innovation and Entrepreneurship for Undergraduates(201910145033);the Fundamental Research Funds for the Central Universities(N182410001)
Photocatalytic technology is gaining increasing attention as one of the key technologies in solving environmental pollution problems owing to its ability to completely decompose organic contaminants. In addition, the development of visible-light-driven photocatalysts has always been an important topic in photocatalytic fields. In this work, Ni(HNCN)2 and BiVO4 were synthesized using a simple chemical precipitation process, which was followed by the preparation of Ni(HNCN)2-BiVO4 composite particles using a simple ultrasonic blending method. The structure of the resulting composite photocatalysts was characterized via XRD, SEM, FT-IR, and UV-Vis spectra, and its photocatalytic activities in the degradation of Rhodamine B were tested. The experimental results revealed that the smaller Ni(HNCN)2 particles produced via ultrasonic treatment were deposited on the surface of BiVO4 to form a heterostructure. The bandgap of single Ni(HNCN)2, BiVO4, and Ni(HNCN)2-BiVO4 are 2.64, 2.41, and 2.37 eV, respectively. Compared to the single Ni(HNCN)2 and BiVO4 particles, there was improved sensitivity to visible light in Ni(HNCN)2-BiVO4 composites due to the narrower bandgap of the composite particles. During the photocatalytic degradation of Rhodamine B, the composite particles synthesized with 1∶2 mole ratio of Ni(HNCN)2 and BiVO4 demonstrated the best visible-light photocatalytic activity. The mechanism of the photocatalysis suggested that the matched band structure promotes the flow of the photogenerated electrons and holes at the interface, thereby improve the photocatalytic efficiency.
Xia ZHANG , Yang SONG , Yu WANG , Luhe JI , Mei YANG , Hao MENG . Ultrasonic Blending Synthesis of Ni(HNCN)2/BiVO4 Composite Visible-Light Induced Photocatalysts[J]. Acta Metall Sin, 2020 , 56(11) : 1551 -1557 . DOI: 10.11900/0412.1961.2020.00062
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