Le Vinh-Dien, Grey Gabrielle J, Han Ill-Hyuk, Hammig Mark D
College of Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.
Amphionic LLC, Plymouth, Michigan 48170, United States.
ACS Omega. 2024 Oct 30;9(47):46929-46942. doi: 10.1021/acsomega.4c06316. eCollection 2024 Nov 26.
Copper(I) sulfide (CuS) has electrical, optical, and thermoelectric properties that make it a promising material for a variety of applications, including energy conversion and antibacterial coatings. Nevertheless, the current synthesis and morphological modulation of CuS typically focuses on thermolysis of the copper and sulfur precursors, is procedurally complex, and demands expensive equipment. In this article, a facile, high-yield, three-step, low-temperature aqueous synthesis alternative for CuS nanoplates is introduced. By variations of the reaction temperature, reducing agent concentration, and pH modifier (NaOH or NH·HO), the morphological characteristics can be controlled. As confirmed with scanning and transmission electron microscopy, the lateral extent of the synthesized CuS nanoplates can be tuned from around 30 nm to around 300 nm simply by varying the heating conditions from 10-100 °C. A similar effect is more subtly observed by varying the concentration of the reducing agent. In addition to size variance, the morphological properties of the CuS nanoplates can be changed by using different bases for the reaction. Characterization of the composition and crystalline structure of the materials has also been performed using energy-dispersive spectroscopy and X-ray diffraction, and optical properties are investigated by UV-visible and near-infrared spectroscopy (UV-vis-NIR). The synthesis pathway described in this paper can be easily performed and feasibly scaled, which is advantageous as the retrieved material is suitable for diverse applications, such as its use in battery electrodes, photonic and charged-particle sensors, and radiation shielding.
硫化亚铜（CuS）具有电学、光学和热电性能，使其成为一种有前途的材料，可用于包括能量转换和抗菌涂层在内的各种应用。然而，目前硫化亚铜的合成和形态调控通常集中在铜和硫前驱体的热解上，过程复杂，且需要昂贵的设备。本文介绍了一种简便、高产率、三步、低温水相合成硫化亚铜纳米片的替代方法。通过改变反应温度、还原剂浓度和pH调节剂（NaOH或NH·HO），可以控制形态特征。如扫描电子显微镜和透射电子显微镜所证实的，只需将加热条件从10-100°C变化，合成的硫化亚铜纳米片的横向尺寸就可以从约30nm调整到约300nm。通过改变还原剂的浓度，可以更细微地观察到类似的效果。除了尺寸变化外，使用不同的碱进行反应可以改变硫化亚铜纳米片的形态特性。还使用能量色散光谱和X射线衍射对材料的组成和晶体结构进行了表征，并通过紫外可见和近红外光谱（UV-vis-NIR）研究了光学性质。本文所述的合成途径易于操作且可进行可行的规模放大，这是有利的，因为所获得的材料适用于多种应用，例如用于电池电极、光子和带电粒子传感器以及辐射屏蔽。
