Abstract
In this work, Ba0.8Sr0.2TiO3(BST) nanotube and BST/Ag/Ag2O are successfully prepared by the electrospinning method and co-precipitation method. And the catalytic activity is investigated through its degradation rate of Reactive brilliant red (Rbr-xb). The Direct Z-type heterojunctions were composed of BST nanotube and Ag/Ag2O. The pyroelectric effect produced by BST, surface plasma resonance (SPR) effect of Ag nanoparticles and the visible light response-ability of Ag2O were united to improve catalytic efficiency. A built-in electric field can be built in BST/Ag/Ag2O. Pyroelectric electrons and holes and photo-induced electrons and holes were separated efficiently, accelerating carrier migration. In the case of photocatalytic effect, the degradation efficiency reached 80% after 50 min. When pyrocatalysis and photocatalysis work together, the degradation efficiency reached 100% only after 30 min. Moreover, Rbr-xb degradation experiments demonstrated that the pyroelectric and photocatalytic synergy has a good prospect in the degradation of organic dyes.
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