title: Facile and low temperature route to synthesis of CuS nanostructure in mesoporous material by solvothermal method.
abstract: The synthesis of CuS nanomaterial in MCM-41 matrix has been realized by chemical synthesis between MCM-41, copper sulfate pentahydrate and thiourea via a solvothermal method in ethylene glycol and water, separately. X-ray diffraction analysis (XRD), diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and fourier transform infrared (FT-IR) were used to characterize the products. At synthesized CuS/MCM-41 sample in ethylene glycol, X-ray diffraction and diffuse reflectance spectroscopy showed pure covellite phase of copper sulfide with high crystality. But prepared CuS/MCM-41 sample in water shows the covellite, chalcocite and the djurleite phase of copper sulfide nanostructures. The formation of CuS nanostructures was confirmed by FT-IR. Photocatalytic activity of CuS/MCM-41 nanocomposites was studied for degradation of Methylene Blue (MB) under visible light. The CuS/MCM-41 nanocomposite is more effective nanocatalyst than synthesized CuS/MCM-41 sample in water for degradation of methylene blue. Several parameters were examined, catalyst amount (0.1-1gL(-1)), pH (1-13) and initial concentration of MB (0.96-10ppm). The extent of degradation was estimated from the residual concentration by spectrophotometrically. The support size was obtained in the range 60-145nm by TEM. In the same way, the average size of copper sulfide in CuSMCM-41E and CuS/MCM-41W nanostructures were obtained about 10nm and 16nm, respectively.
authors.affiliation: Department of Chemistry, Faculty of Science, University of Guilan, P.O. Box 1914, Rasht, Iran. Electronic address: sohrabnezhad@guilan.ac.ir.
authors.forename: Sh
authors.initials: Sh
authors.lastname: Sohrabnezhad
authors.affiliation: Department of Chemistry, Faculty of Science, University of Guilan, P.O. Box 1914, Rasht, Iran.
authors.forename: M A
authors.initials: MA
authors.lastname: Zanjanchi
authors.affiliation: Department of Chemistry, Faculty of Science, Payam_Noor University, Sari, Iran.
authors.forename: S
authors.initials: S
authors.lastname: Hosseingholizadeh
authors.affiliation: Department of Chemistry, Faculty of Science, Payam_Noor University, Sari, Iran.
authors.forename: R
authors.initials: R
authors.lastname: Rahnama
mesh_terms: D003080:Cold Temperature; D003300:Copper / Q000737:chemistry*; D019855:Ethylene Glycol / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000191:economics / Q000379:methods; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: C509968:MCM-41; D014867:Water; D012822:Silicon Dioxide; D003300:Copper; D019855:Ethylene Glycol; C017846:cupric sulfide
keywords: Chalcocite phase; Copper sulfide nanostructures; Covellite phase; Photocatalysis; Polyol method; X-ray diffraction