Flower-like Bi₂WO₆ microspheres and bulk g-C₃N₄ were prepared by the hydrothermal method and high-temperature calcining method, respectively. A new method based on the combination of ultrasonic stripping and mechanical stirring was used to obtain uniform composite x-Bi₂WO₆/g-C₃N₄ (x is the Bi₂WO₆ mass ratio) photocatalysts with a Z-scheme heterojunction. In the reaction of benzyl alcohol and aniline to form imine, the optimal composite, 30%-Bi₂WO₆/g-C₃N₄, showed a conversion rate of 87.6%, which is much higher than that of pure Bi₂WO₆ and g-C₃N₄. Characterization by SEM and TEM showed that the ultrasonically stripped g-C₃N₄ significantly reduced the radial dimension compared to bulk g-C₃N₄. A uniformly dispersed photocatalytic material was formed, and it maintained a flower-like microsphere structure. Materials characterized by N₂ adsorption–desorption isotherms (BET) showed that the specific surface area of the g-C₃N₄ nanosheets increased by approximately ten times after ultrasonic stripping. The photostability of the composite was verified by cyclic experiments. Under visible light irradiation, the activation energy of the coupling reaction between benzyl alcohol and aniline was found to be decreased by 29.8 kJ mol⁻¹. A capture experiment was used to verify the active species in the photocatalytic system, with the reaction found to be mainly completed through the synergistic action of h⁺, e⁻ and •O₂⁻.

通过水热法和高温煅烧法分别制备了花状的Bi ₂ WO ₆微球和块状gC ₃ N ₄。采用基于超声剥离和机械搅拌相结合的新方法，获得具有Z型异质结的均匀复合x-Bi ₂ WO ₆ / gC ₃ N ₄（x为Bi ₂ WO ₆质量比）光催化剂。在苯甲醇与苯胺反应生成亚胺的过程中，最佳复合物为30％-Bi ₂ WO ₆ / gC ₃ N ₄，显示出87.6％的转化率，远高于纯Bi ₂ WO ₆和gC ₃ N ₄的转化率。通过SEM和TEM表征表明，与本体gC ₃ N ₄相比，超声剥离的gC ₃ N ₄显着减小了径向尺寸。形成了均匀分散的光催化材料，并保持了花状微球结构。以N ₂吸附-解吸等温线（BET）为特征的材料表明，gC ₃ N ₄的比表面积超声剥离后，纳米片增加了大约十倍。通过循环实验验证了复合材料的光稳定性。发现在可见光照射下，苯甲醇与苯胺之间的偶联反应的活化能降低了29.8kJ mol ^-1。A捕获实验中使用，以验证在光催化系统的活性种，与反应发现通过h的协同作用主要完成⁺，电子^-和•Ø ₂ ^- 。