Abstract In this work, an attempt has been made to fabricate multifunctional composite photocatalysts by coupling sea urchin shaped ZnO with MoS2 and polyaniline (PANI) sheets, and a significant improvement in photocatalytic activity was perceived with composites in comparison to pristine components. It was found that the ternary ZnO–MoS2-PANI photocatalyst showed excellent adsorptive decomposition of organic pollutants natural sunlight irradiation. In addition, enhanced photocatalytic hydrogen evolution was also evidenced, which revealed the multifunctional nature of the photocatalysts. In the case of organic pollutant decomposition, the presence of MoS2 in ZnO–MoS2-PANI offers abundant catalytic active sites which result in adsorption of the pollutants and boost the photocatalytic activity. While for the photocatalytic hydrogen evolution, the binary ZnO-PANI composite showed the utmost activity in comparison to the pristine components and ZnO–MoS2-PANI, which is due to the fact that the higher loading of MoS2 in the composite increases the number of S atoms on the basal planes, which are inactive for H2 evolution, and hence results in decreased photocatalytic activity. The results discussed in this work may pave the approach for the design and development of ZnO based multifunctional materials for diverse photocatalytic applications.

中文翻译：

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海胆形 ZnO 与 MoS2 和聚苯胺偶联作为有机污染物分解和析氢的高效光催化剂

摘要 在这项工作中，尝试通过将海胆状 ZnO 与 MoS2 和聚苯胺 (PANI) 片偶联来制备多功能复合光催化剂，与原始组分相比，复合材料的光催化活性显着提高。结果表明，三元 ZnO-MoS2-PANI 光催化剂对自然阳光照射下的有机污染物表现出优异的吸附分解。此外，还证明了光催化析氢增强，这揭示了光催化剂的多功能性。在有机污染物分解的情况下，ZnO-MoS2-PANI 中 MoS2 的存在提供了丰富的催化活性位点，导致污染物吸附并提高光催化活性。而对于光催化析氢，与原始组分和 ZnO-MoS2-PANI 相比，二元 ZnO-PANI 复合材料显示出最大的活性，这是因为复合材料中 MoS2 的负载量越高，基面上的 S 原子数量越多，这对 H2 析出无活性，因此导致光催化活性降低。这项工作中讨论的结果可能为设计和开发用于各种光催化应用的 ZnO 基多功能材料铺平道路。