Porous cauliflower-like molybdenum disulfide/cadmium sulfide hybrid micro/nano structure: Enhanced visible light absorption ability and photocatalytic activity.
Porous cauliflower-like molybdenum disulfide/cadmium sulfide hybrid micro/nano structure: Enhanced visible light absorption ability and photocatalytic activity.
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DOI：
10.1016/j.jcis.2021.01.059
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发表时间：
2021-01
影响因子：
9.9
通讯作者：
Xing Liu;Zhao-Hui Ruan;Lu Zhang;Yudong Li;Yanqiu Jiang;Jizhuang Fan;Xianzhu Xu;Yunchen Du
中科院分区：
文献类型：
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作者：
Xing Liu;Zhao-Hui Ruan;Lu Zhang;Yudong Li;Yanqiu Jiang;Jizhuang Fan;Xianzhu Xu;Yunchen Du
微/纳米结构材料可以控制光的衍射和传播，从而提供可用于增强光催化过程的新的光学特性。在这项工作中，一系列菜花状的二硫化钼/硫化镉混合微/纳米结构的合成。这些结构含有大量的裂纹和孔隙，可以增强光的吸收和利用，以及缩短光生电子传递到催化剂表面的距离。紫外-可见漫反射吸收光谱结果表明，该复合材料在可见光区具有增强的吸收。使用时域有限差分（FDTD）模拟的合成材料的光学特性的进一步研究表明，菜花状的微/纳米结构增加了在MoS 2/CdS界面处的光吸收强度。值得注意的是，MoS 2/CdS混合微米/纳米结构表现出高的光催化制氢活性（9.5 mmol g-1h-1）和持久的循环稳定性。这有助于我们进一步理解多孔结构材料对光吸收和利用的增强机理。
Micro-/nanostructured materials can control the diffraction and propagation of light, thereby providing new optical properties that can be exploited to enhance photocatalytic processes. In this work, a series of the cauliflower-like MoS2/CdS hybrid micro-/nanostructures is synthesized. These structures contain numerous cracks and pores that can enhance the absorption and utilization of light as well as shorten the distance for transferring photogenerated electrons to the catalyst surface. The results of ultraviolet–visible diffuse reflectance absorption spectra show that the composite material has enhanced absorption in the visible light region. Further investigation of the optical characteristics of the synthesized materials using a finite-difference time-domain (FDTD) simulation reveals that the cauliflower-like micro-/nanostructure increases the optical absorption intensity at the MoS2/CdS interface. Notably, the MoS2/CdS hybrid micro-/nanostructures exhibits high photocatalytic hydrogen production activity (9.5 mmol g−1h−1) and long-lasting cycle stability. This work helps us to further understand the enhancement mechanism of light absorption and utilization by porous structural materials.