Facet-dependent cuprous oxide nanocrystals decorated with graphene as durable photocatalysts under visible light

Shou Heng Liu, Jun Sheng Lu

研究成果: Article同行評審

6 引文 斯高帕斯(Scopus)

摘要

Three morphologies (octahedral, hierarchical and rhombic dodecahedral) of crystal Cu2O with different facets ({111}, {111}/{110}, and {110}) incorporating graphene sheets (denoted as o-Cu2O-G, h-Cu2O-G and r-Cu2O-G, respectively) have been fabricated by using simple solution-phase techniques. Among these photocatalysts, the r-Cu2O-G possesses the best photocatalytic performance of 98% removal efficiency of methyl orange (MO) with outstanding kinetics for 120 min of visible light irradiation. This enhancement is mainly due to the dangling “Cu” atoms in the highly active {110} facets, resulting in the increased adsorption of negatively charged MO. More importantly, the unique interfacial structures of Cu2O rhombic dodecahedra connected to graphene nanosheets can not only decrease the recombination of electron-hole pairs but also stabilize the crystal structure of Cu2O, as verified by a series of spectroscopic analyses (e.g., X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM)). The effective photocatalysts developed in this work could be applied to the efficient decolorization of negatively charged organic dyes by employing solar energy.

原文English
文章編號423
期刊Nanomaterials
8
發行號6
DOIs
出版狀態Published - 2018 六月 11

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)

指紋 深入研究「Facet-dependent cuprous oxide nanocrystals decorated with graphene as durable photocatalysts under visible light」主題。共同形成了獨特的指紋。

引用此