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Author Hong, Tianjie ♦ Tao, Feifei ♦ Lin, Jiudong ♦ Ding, Wei ♦ Lan, Mingxuan
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ ABSORPTION SPECTROSCOPY ♦ CATALYSTS ♦ COPPER ♦ COPPER OXIDES ♦ ENERGY GAP ♦ MICROSPHERES ♦ MIXTURES ♦ ORGANIC COMPOUNDS ♦ PHOTOCATALYSIS ♦ POWDERS ♦ SURFACTANTS ♦ SYNTHESIS ♦ TIME DEPENDENCE ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ VISIBLE RADIATION ♦ X-RAY DIFFRACTION ♦ X-RAY PHOTOELECTRON SPECTROSCOPY
Abstract The hierarchical Cu{sub 2}O/Cu hollow microspheres have been fabricated by the one-pot solvothermal redox method, which is one-step approach without any surfactant and template. By using the HRTEM, XRD, XPS and UV–vis spectroscopy, the as-prepared product is composed of Cu{sub 2}O and Cu with energy band gap of 1.72 eV. Based on the time-dependent experiments, the content of Cu{sub 2}O and Cu compositions can be effectively controlled by adjusting the reaction time and a possible mechanism is proposed. In addition, using various dye molecules to stimulate pollutants, the hierarchical Cu{sub 2}O/Cu hollow microspheres reacted for 8 h exhibit excellent visible-light photocatalytic activities, which is much higher than those of the Cu{sub 2}O/Cu catalysts formed at the shorter reaction time, commercial Cu{sub 2}O powder and the mixture of alone Cu{sub 2}O and Cu. This enhanced photocatalytic performance makes these hierarchical Cu{sub 2}O/Cu hollow microspheres a kind of efficient visible-light photocatalyst in removing some organic compounds in wastewater. - Graphical abstract: The hierarchical Cu{sub 2}O/Cu hollow microspheres with adjustable components have been synthesized by one-step solvothermal redox approach. The special structures and composition lead to the excellent visible-light photocatalytic activity. - Highlights: • The hierarchical Cu{sub 2}O/Cu hollow microspheres are fabricated by one-step approach. • The content of Cu{sub 2}O and Cu can be controlled by adjusting the reaction time. • The material exhibits a better visible-light photocatalytic activity and stability. • Degradation kinetics of MO by Cu{sub 2}O/Cu fits the pseudo first-order model.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-08-15
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 228


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