Construction of one dimensional ZnWO4@SnWO4 core-shell heterostructure for boosted photocatalytic performance |
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| Affiliation: | 1. College of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou 362000, China;2. Department of Chemical Engineering, Norwegian University of Science and Technology, N-7491, Trondheim, Norway;1. College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China;2. School of Materials Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China;1. Nano Materials Research Lab, Department of Nanosciences and Technology, Karunya University, Coimbatore 641 114, Tamil Nadu, India;2. Nanomaterials and System Lab, Department of Mechatronics Engineering, Jeju National University, Jeju 690 756, Republic of Korea;1. School of Textile and Material Engineering, Dalian Polytechnic University, #1 Qinggongyuan, Dalian, 116034, PR China;2. Instrumental Analysis Center, Dalian Polytechnic University, #1 Qinggongyuan, Dalian, 116034, PR China;3. School of Light Industry and Chemical Engineering, Dalian Polytechnic University, #1 Qinggongyuan, Dalian, 116034, PR China |
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| Abstract: | The one-dimensional ZnWO4@SnWO4 photocatalyst with a core-shell heterostructure was successfully constructed by a simple two-step method. It is interesting to note that ZnWO4@SnWO4 composite photocatalyst owns a higher photocatalytic activity for RhB degradation under visible light irradiation. The introduction of SnWO4 shell layer, which forms a clear heterogenous interface between ZnWO4 and SnWO4, increases the photo-absorption efficiency of ZnWO4 nanorods. In addition, its band-edge absorption evidently shifts toward the visible region. Based on the photoelectrochemical (PEC) and electron spin resonance (ESR) measurements, it is found that the photocatalytic activity was attributed to the efficient separation and transfer of photo-generated charge carriers. Hence, they can produced more hydroxyl radical ( OH) as the main active species in the photocatalytic reaction process. |
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| Keywords: | Core-shell Heterostructure Photocatalyst Visible light |
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