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Issue 18, 2018
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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

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Abstract

In this paper, a type of three-dimensionally ordered macroporous (3DOM) composite of Sn4+-doped titanium dioxide (Sn–TiO2) was synthesized by the colloidal crystal template technology, and 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 that 3DOM Pt/Sn–TiO2 had the typical anatase and rutile mixed phase as well as a well-ordered three-dimensional macroporous structure. After photoreduction, Pt in the composites was present mainly in the form of a simple substance, and it was evenly distributed on the surface of the 3DOM composite. Meanwhile, the local surface plasmon resonance effect (SPR) of the noble metal increased visible-light absorption of the composite. Multi-mode photocatalytic experiments showed that 3DOM Pt/Sn–TiO2 exhibited significantly higher activity in photodegradation and photolysis for 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 significantly improved in the water hydrogen production experiment. Compared with the result of P25, the hydrogen evolution capacity of 3DOM Pt/Sn–TiO2 increased by 40 times.

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

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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., 2018,42, 15190-15199
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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, 42, 15190
    DOI: 10.1039/C8NJ02903B

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