Enhanced photocatalytic performance of Cu.sub.2O/TiO.sub.2/rGA composites to degrade gas-phase unsymmetrical dimethylhydrazine

Graphene in photocatalyst composite plays a critical role in carriers transfer and separation, and the design of photocatalysts with graphene is considered as an effective method to improve the photocatalytic performance. In this work, a series of visible light-driven Cu.sub.2O/TiO.sub.2/rGA photoca...

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Bibliographic Details
Published in:Journal of materials science 2022-02, Vol.57 (5), p.3538
Main Authors: Hou, Ruomeng, Jia, Ying, Jin, Guofeng, Shi, Menglin, Jiang, Nan
Format: Article
Language:English
Subjects:
Catalysis
Graphene
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Summary:Graphene in photocatalyst composite plays a critical role in carriers transfer and separation, and the design of photocatalysts with graphene is considered as an effective method to improve the photocatalytic performance. In this work, a series of visible light-driven Cu.sub.2O/TiO.sub.2/rGA photocatalysts were fabricated by hydrothermal and reflux reductive method to degrade the UDMH (unsymmetrical dimethylhydrazine) gas. The maximum conversion could achieve 62.6% when the reduction reflux time was 120 min, which is ascribed to the superior synergy of absorption and photocatalysis. The absorption was mainly from the high specific surface area of Cu.sub.2O/TiO.sub.2/rGA (reduced graphene oxide aerogels) and affinity of copper for UDMH, while the semiconductor and graphene contribute to the photocatalysis. The Z-scheme heterojunction mechanism was proposed to explain the enhancement of UDMH degradation based on the detected O.sub.2.sup.*- and *OH reactive species and bandgap structure. In addition, the Cu.sub.2O/TiO.sub.2/rGA photocatalyst showed stable performance in the degradation of UDMH gas through experimental results and characterization.
ISSN:0022-2461
DOI:10.1007/s10853-021-06782-5