Abstract Present study is related to synthesize copper sulfide (CuS) nanoparticles by co-precipitation method varying calcinations temperature regimes (250,500 and 750 °C) respectively. These nanoparticles (NPs) were characterized by using various characterization techniques such as XRD, SEM, EDX, FTIR and TGA. Deviation in crystallite size, crystal structure (hexagonal, rhombohedral and monoclinic), texture coefficient and lattice parameters were identified by using XRD analysis. SEM micrograph represented that the grain size increase by increasing temperature and EDX graph shows the elemental composition of nanomaterials. Moreover, the FTIR analysis depicted the different rotational and vibrational mode attached to the surface of CuS-NPs and thermogravimetric analysis (TGA) used to identify phase shifting with varying temperature. Finally, structural analysis revealed that with increase in temperature as-synthesized CuS transform into non-stoichiometric Cu9S5 at 250 °C to CuSO4 at 500 °C and then change into CuO (750 °C).

中文翻译：

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不同煅烧温度下硫化铜纳米颗粒结构、化学和热性能变化的广泛评估

摘要 本研究涉及通过共沉淀法在不同的煅烧温度范围（250,500 和 750 °C）下合成硫化铜 (CuS) 纳米颗粒。这些纳米颗粒 (NPs) 通过使用各种表征技术进行表征，例如 XRD、SEM、EDX、FTIR 和 TGA。使用XRD分析确定微晶尺寸、晶体结构（六方、菱面体和单斜）、织构系数和晶格参数的偏差。SEM 显微照片表示晶粒尺寸随温度升高而增加，EDX 图显示纳米材料的元素组成。此外，FTIR 分析描述了附着在 CuS-NPs 表面的不同旋转和振动模式，热重分析 (TGA) 用于识别随温度变化的相移。最后，