Amorphous CoMoS4 Nanostructure for Photocatalytic H2 Generation, Nitrophenol Reduction, and Methylene Blue Adsorption,ACS Applied Energy Materials

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Amorphous CoMoS4 Nanostructure for Photocatalytic H2 Generation, Nitrophenol Reduction, and Methylene Blue Adsorption
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-11-13 00:00:00 , DOI: 10.1021/acsanm.9b01582
Qiuhao Li ₁ , Xiu-Qing Qiao ₁ , Yanlin Jia ₁ , Dongfang Hou ₁ , Dong-Sheng Li _{1,

2}

Affiliation

High-performance ternary transition-metal chalcogenides (TMDs) are desired in various application fields. However, developing ternary TMDs with unique performance via an efficient and economical method is still in its infancy. Herein, we developed an amorphous cobalt molybdenum sulfide (CoMoS₄) nanostructure via a facile cation exchange method. XPS, SEM, and HRTEM unravel that the as-synthesized amorphous CoMoS₄ nanostructures have defective structures and stacking porous configurations, which could provide abundant active sites for catalysis and adsorption behavior. As expected, such material not only can serve as a non-precious-metal cocatalyst for CdS to enhance photocatalytic H₂ evolution but also can exhibit high efficiency for nitrophenol catalytic reduction, in which the apparent reaction rate constant (k_app) is 5.08 × 10^–2 s^–1, ranking as one of the reported best non-noble-metal catalysts. Additionally, the CoMoS₄ nanostructures can adsorb methylene blue (MB) very quickly, achieving adsorption equilibrium in just 90 s. More importantly, the nanostructures could be easily separated and recycled by a simple filtration method. This work enriches the research and applications of ternary transition-metal chalcogenides.

中文翻译：

用于光催化H ₂生成，硝基苯酚还原和亚甲基蓝吸附的非晶CoMoS ₄纳米结构

在各种应用领域中都需要高性能三元过渡金属硫属化物（TMD）。但是，通过高效，经济的方法开发具有独特性能的三元TMD仍处于起步阶段。在这里，我们通过一种简便的阳离子交换方法开发了一种非晶态的硫化钴钼（CoMoS ₄）纳米结构。XPS，SEM和HRTEM证明合成后的非晶态CoMoS ₄纳米结构具有缺陷的结构和堆积的多孔结构，可为催化和吸附行为提供丰富的活性位点。不出所料，这种材料不仅可以用作CdS的非贵金属助催化剂，以增强H _2的光催化作用。催化剂的表面活性速率常数（k _app）为5.08×10 ^–2 s ^–1，是已报道的最佳非贵金属催化剂之一。此外，CoMoS ₄纳米结构可以非常快速地吸附亚甲基蓝（MB），仅在90 s内即可达到吸附平衡。更重要的是，可以通过简单的过滤方法轻松地分离和回收纳米结构。这项工作丰富了三元过渡金属硫属元素化物的研究和应用。

更新日期：2019-11-13

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