Reduced graphene oxide-ZnO hybrid composites as photocatalysts: The role of nature of the molecular target in catalytic performance

Reduced graphene oxide-ZnO hybrid composites as photocatalysts : The role of nature of the molecular target in catalytic performance

Gradone, Alessandro (author): National Research Council, Institute for Microelectronics and Microsystems, Via Piero Gobetti 101, 40129, Bologna, Italy. Department of Chemistry “G. Ciamician”, University of Bologna, Via Francesco Selmi 2, 40126, Bologna, Italy

Mazzaro, Raffaello (author): National Research Council, Institute for Microelectronics and Microsystems, Via Piero Gobetti 101, 40129, Bologna, Italy

Morandi, Vittorio (author): National Research Council, Institute for Microelectronics and Microsystems, Via Piero Gobetti 101, 40129, Bologna, Italy

(creator_code:org_t)

Elsevier, 2021
2021
English.
In: Ceramics International. - : Elsevier. - 0272-8842 .- 1873-3956. ; 47:14, s. 19346-19355

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

Spurred by controversial literature findings, we enwrapped reduced graphene oxide (rGO) in ZnO hierarchical microstructures (rGO loadings spanning from 0.01 to 2 wt%) using an in situ synthetic procedure. The obtained hybrid composites were carefully characterized, aiming at shining light on the possible role of rGO on the claimed increased performance as photocatalysts. Several characterization tools were exploited to unveil the effect exerted by rGO, including steady state and time resolved photoluminescence, electron microscopies and electrochemical techniques, in order to evaluate the physical, optical and electrical features involved in determining the catalytic degradation of rhodamine B and phenol in water.Several properties of native ZnO structures were found changed upon the rGO enwrapping (including optical absorbance, concentration of native defects in the ZnO matrix and double-layer capacitance), which are all involved in determining the photocatalytic performance of the hybrid composites. The findings discussed in the present work highlight the high complexity of the field of application of graphene-derivatives as supporters of semiconducting metal oxides functionality, which has to be analyzed through a multi-parametric approach.

By the author/editor: Landström, Anton; Gradone, Alessan ...; Mazzaro, Raffael ...; Morandi, Vittori ...; Concina, Isabell ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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