Fast synthesis of CuS and Cu9S5 microcrystal using subcritical and supercritical methanol and their application in photocatalytic degradation of dye in water

Copper sulfides were synthesized through a fast and simple subcritical and supercritical methanol technique by controlling the reaction temperature

Shuangming Li; Zhe Zhang; Lin Yan; Shengnan Jiang; Ning Zhu; Jian Li; Wenxiu Li; Sansan Yu

2016

Scholarcy highlights

  • Copper sulfides were synthesized through a fast and simple subcritical and supercritical methanol technique by controlling the reaction temperature
  • Results show that spherical CuS and polyhedral Cu9S5 with an average size of 200–600 and 200–500 nm were obtained at 150 and 260 °C for 15 min in subcritical and supercritical methanol, respectively
  • The UV–vis absorption spectroscopy of the samples reveals that the band gap energies of CuS and Cu9S5 were 1.77 and 1.55 eV, respectively
  • CuS exhibited excellent photocatalytic degradation of methylene blue without the use of hydrogen peroxides, showing 85.4% degradation rate of MB after 5 h irradiation

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