• 关键词：Bi₂WO₆  UiO-66  复合光催化剂

• 基金项目：山西省基础研究计划项目（No.201801D221341）

• 高远
• 太原理工大学环境科学与工程学院，太原 030024

• 赵珊
• 太原理工大学环境科学与工程学院，太原 030024

• 梁转转
• 太原理工大学环境科学与工程学院，太原 030024

• 杨艳青
• 太原理工大学环境科学与工程学院，太原 030024

• 张卫珂
• 太原理工大学环境科学与工程学院，太原 030024

• 摘要：以冰乙酸作为模板剂，采用溶剂热法制备了一种Bi₂WO₆/UiO-66复合光催化剂，探究了不同UiO-66掺杂量对其光催化性能的影响，通过XRD、FTIR、SEM、N₂吸附-脱附、UV-Vis DRS、PL等手段对复合材料进行表征，以有机染料罗丹明B（RhB）作为目标降解物评价复合材料的光催化性能. 结果表明，该复合材料在可见光下光催化降解RhB时具有很强的活性. 经过4次循环实验，光催化剂的催化活性没有明显降低. 通过自由基捕获实验证明起主要作用的活性物质为空穴（h⁺），并提出了可能的光催化降解机理为：UiO-66均匀分布在Bi₂WO₆的表面，增大了复合材料的比表面积，Bi₂WO₆光生电子转移到UiO-66的表面，降低了电子空穴复合率，h⁺则位于Bi₂WO₆表面，直接氧化有机物达到净化效果.

• Abstract：Bi₂WO₆/UiO-66 photocatalysts were fabricated through solvothermal method using acetic acid as template. The photocatalytic performance of as fabricated composites with different amounts of UiO-66 adding was explored. The as harvested composites were analyzed by XRD， FTIR， SEM， N₂ adsorption-desorption， UV-Vis DRS， PL， etc. Rhodamine B （RhB） was used as the target degradation organic dye for the photocatalytic performance evaluation. The results showed that， the composites performed extinguish activity for the photocatalytic degradation of RhB under visible light. There was no significant decrease of the photocatalytic activity even after 4 cycles. The free radical capture experiments indicate that the electron hole （h⁺） was the main active site. And the possible photocatalytic degradation mechanism was proposed. The specific surface area of the composites were enlarged due to the uniform distribution of UiO-66 on the surface of Bi₂WO₆. The electron-hole pairs recombination rate was decreased due to the photogenerated electrons transferring from Bi₂WO₆ to the surface of UiO-66， and h⁺， which was remained on the surface of Bi₂WO₆， directly oxidized the organics to achieve the purification.

• Key words：Bi₂WO₆  UiO-66  composite photocatalyst

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