Controllable synthesis, optical and photocatalytic properties of CuS nanomaterials with hierarchical structures

• Published in: Powder technology Vol. 198; no. 2; pp. 267 - 274
• Main Authors: Li, Fei, Wu, Jianfang, Qin, Qinghua, Li, Zhen, Huang, Xintang
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 10.03.2010; Elsevier
• Subjects: Applied sciences; Catalysis; Catalytic reactions; Chemical engineering; Chemistry; CuS; Exact sciences and technology; General and physical chemistry; Miscellaneous; Nanomaterials; Optical properties; Photocatalytic; Solid-solid systems; Solvothermal; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; CuS; Photocatalytic; Nanomaterials; Solvothermal; Optical properties; Scanning electron microscopy; Photocatalysis; X ray diffraction; Modeling; Transmission electron microscopy; Morphology; Chemical synthesis; Nanostructured materials
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2009.11.018

The controlled synthesis of CuS nanomaterials with hierarchical structures has been realized by chemical synthesis between copper nitrate trihydrate and thiourea via a solvothermal route. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy were used to characterize the products. It was shown that CuS nanomaterials with hierarchical structures were composed of numerous nanoplates or nanorods. Experiments demonstrated that the morphologies of CuS nanomaterials were significantly influenced by reaction temperature, growth time and sulfur sources. A growth model was proposed for the selective formation of CuS hierarchical structures. The optical properties of the CuS hierarchical structures were investigated by ultraviolet–visible spectroscopy and photoluminescence spectroscopy. The ultraviolet–visible spectrum had a broad absorption in the visible range and the photoluminescence spectrum showed a strong green emission. Photocatalytic performance of the CuS hierarchical structures was evaluated by measuring the decomposition rate of methylene blue solution under natural light. The CuS hierarchical structures showed good photocatalytic activity. CuS nanomaterials with hierarchical structures composed of nanoplates and nanorods have been successfully synthesized by a solvothermal route. Experiments demonstrated that the morphologies of CuS nanomaterials were significantly influenced by reaction temperature, growth time and sulfur sources. The CuS hierarchical structures exhibited high photocatalytic activity for the complete oxidation of methylene blue. [Display omitted]