Synthesis and visible-light-driven photocatalytic activity of p–n heterojunction Ag2O/NaTaO3 nanocubes
Source abstract
Abstract
Abstract The constructing of p–n heterojunction photocatalytic system has received much attention in environmental purification and hydrogen generation from water. In this study, an efficient visible-light-driven p – n heterojunction Ag 2 O/NaTaO 3 was successfully prepared by chemical precipitation method at room temperature. It showed an enhanced photocatalytic activity for the degradation of rhodamine B (RhB) under visible-light irradiation, much higher than those of either individual Ag 2 O or NaTaO 3 . The reactive species scavenger results indicated the superoxide anion radicals ( O 2− ) played key roles in RhB decoloration. From the experimental results and the relative band gap position of these semiconductors, a detailed possible photocatalytic mechanism of the Ag 2 O/NaTaO 3 heterojunction under visible light was proposed. The enhancement of the photocatalytic activity was attributed to the interfacial electronic interaction between NaTaO 3 and Ag 2 O and the high migration efficiency of photogenerated carriers.
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Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Quantum Dots Synthesis And Properties · Covalent Organic Framework Applications
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