Abstract
In this contribution, a facile and low-temperature solution route has been developed to large-scale synthesis of Cu2O with polyhedral, porous and hollow structures by the assistance of surfactant CTAB. The morphologies (six symmetric branches, porous branches and porous-shell hollow spheres) of the Cu2O particles, which can be controlled by changing the amount of CTAB and a possible formation mechanism, is also proposed. Our results found that CTAB not only serves as a soft template to synthesize hollow and porous Cu2O structures, but also acts as a capping agent to adsorb on the {111} plane to obtain six symmetric branches of Cu2O. Moreover, the photocatalytic and gas-sensing properties of the hollow and porous structure Cu2O samples were studied in detail. Due to the special structure character, the Cu2O porous-shell hollow spheres exhibited both strong adsorption abilities and high degradation activities for methyl orange (MO) under visible light irradiation. A gas sensor was also fabricated which showed high sensitivity for ethanol.
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