Abstract
In this work, (BiO)2CO3-BiOCl heterojunctions were in-situ constructed by acid etching of (BiO)2CO3 using HCl. The formation of (BiO)2CO3-BiOCl heterojunctions was confirmed by XRD and high-resolution transmission electron microscopy (HRTEM). The separation properties of photoinduced e−/h+ pairs were investigated by surface photovoltage spectroscopy (SPS). The results show that O2− and OH were yielded in the (BiO)2CO3-BiOCl composite photocatalytic system. The photocatalytic abilities of the samples toward degradation of methyl orange (MO) were evaluated, the results exhibit that when the molar ratio of (BiO)2CO3/BiOCl is 1/8, the sample displays the highest activity. A direct Z-scheme mechanism was proposed.
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