Bi₂O₃-BaTiO₃ heterojunction with high photocatalysis efficiency was directly synthesized by rapid thermal processing (RTP). Bi₂O₃ and BaTiO₃ were mixed in ratio and treated by RTP and conventional thermal processing (CTP), respectively. RTP samples have obvious Bi₂O₃ diffraction peaks, while CTP samples show pure BaTiO₃ tetragonal perovskite. More small particles and layered existed in RTP samples. Photodegradation of MB solutions shows that RTP can promote photocatalytic efficiency. Its main lies in the following points: RTP can remove grain boundary defects by strengthening the bond grains; RTP can limit the solution region of the two substances to a certain range to get the best built-in electric field width; and RTP can strengthen the tetragonal BaTiO₃ phase to hasten ion movement. Therefore, RTP can achieve much higher photocatalytic efficiency by improving the build heterojunction. This work provides a direct and efficient route to get improvement and high performance of heterojunction.

中文翻译：

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Bi2O3-BaTiO3 异质结的快速热处理和改进的光催化

通过快速热处理（RTP）直接合成了具有高光催化效率的Bi ₂ O ₃ -BaTiO _{3异质结。}将Bi ₂ O ₃和BaTiO ₃按比例混合并分别通过RTP和常规热处理(CTP)进行处理。RTP样品具有明显的Bi ₂ O ₃衍射峰，而CTP样品显示纯BaTiO ₃四方钙钛矿。RTP样品中存在较多的小颗粒和层状结构。MB 溶液的光降解表明 RTP 可以提高光催化效率。其主要在于以下几点：RTP可以通过强化晶粒的结合来消除晶界缺陷；RTP可以将两种物质的溶液区域限制在一定范围内，以获得最佳的内建电场宽度；RTP可以强化四方BaTiO ₃相，加速离子运动。因此，RTP可以通过改进构建异质结来实现更高的光催化效率。这项工作为异质结的改进和高性能提供了直接有效的途径。