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journal article·2022-01Open access

Influences of Sn/Cu single doping and CO-doping on the structure and photocatalytic property of anatase/rutile mixed crystal TiO2 nanomaterials under UV-visible light

Intelligent Manufacturing College, Chengdu Jincheng College, Chengdu 611731, China, Q. Qin, Q. Zhou, School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China, L. L. He, School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China, X. D. Zhu, School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China, W. Feng, School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China, J. Wang, School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China

Digest Journal of Nanomaterials and Biostructures· Volume 17· Issue 1
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Abstract

Anatase/rutile mixed crystal TiO2 nanomaterials were prepared by sol-gel method and modified by Sn/Cu single doping and co-doping. Sn doping promotes the transformation from anatase to rutile, while Cu doping inhibits the phase transformation. The inhibition effect of Cu doping on phase transition is stronger than that of Sn doping. Sn or Cu doping reduces the recombination rate, and co-doping produces a synergistic effect on the inhibition of recombination. The photocatalytic experiment results show that the photocatalytic activity of Sn-TiO2 is higher than that of pure TiO2 owing to higher quantum efficiency and light source absorption. The first order reaction rate constant increases from 0.00904 min-1 for pure TiO2 to 0.01476 min-1 for Sn-TiO2. Unexpected, the photocatalytic activities of Cu-TiO2 and Sn/Cu-TiO2 are lower than that of pure TiO2. Although Cu doping improves the quantum efficiency, it reduces the absorption of ultraviolet region significantly, which is the key reason for the decline of their photocatalytic performance.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Advanced Nanomaterials in Catalysis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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