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Three-dimensionally ordered macroporous Sn4+ doped TiO2 with anatase–rutile mixed phase via Pt loading by photoreduction method: enhanced photodegradation and hydrogen production performance

Abstract

In this paper, a kind of three-dimensionally ordered macroporous (3DOM) composite Sn4+ doped titanium dioxide (Sn-TiO2) was synthesized by the colloidal crystal template technology, and the Pt metal particles were successfully supported on the composite by the photoreduction method (3DOM Pt/Sn-TiO2). The crystal structure, morphology, composition and surface physicochemical properties of 3DOM Pt/Sn-TiO2 were characterized by various analytical methods. The characterization data showed 3DOM Pt/Sn-TiO2 had the typical anatase and rutile mixed phase as well as a well-ordered three-dimensional ordered macroporous structure. After a photoreduction, Pt in the composites was mainly in the form of a simple substance and evenly distributed on the surface of three-dimensionally ordered composite. Meanwhile, the local surface plasmon resonance effect (SPR) of the noble metal increases the visible light absorption of the composite. Multi-mode photocatalytic experiments showed that 3DOM Pt/Sn-TiO2 exhibited significantly higher activity in photodegradation and photolysis hydrogen evolution than pure anatase TiO2. In photodegradation experiments, 3DOM Pt/Sn-TiO2 showed the highest photodegradation activity and degradation rate. Simultaneously, the hydrogen evolution ability of 3DOM Pt/Sn-TiO2 had been significantly improved in the water hydrogen production experiment. Compared with P25, the hydrogen evolution capacity of 3DOM Pt/Sn-TiO2 had increased by 40 times.

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Publication details

The article was received on 11 Jun 2018, accepted on 02 Aug 2018 and first published on 03 Aug 2018


Article type: Paper
DOI: 10.1039/C8NJ02903B
Citation: New J. Chem., 2018, Accepted Manuscript
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    Three-dimensionally ordered macroporous Sn4+ doped TiO2 with anatase–rutile mixed phase via Pt loading by photoreduction method: enhanced photodegradation and hydrogen production performance

    Q. Zhou, L. Li, Y. Xin, D. Liu and X. Zhang, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ02903B

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