1. Template-free and green sonochemical synthesis of hierarchically structured CuS hollow microspheres displaying excellent Fenton-like catalytic activities
- Author
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Li Yao, Hanmei Hu, Difang Zhao, Xinqing Ge, Chonghai Deng, and Chengliang Han
- Subjects
Aqueous solution ,Materials science ,Stacking ,chemistry.chemical_element ,Nanotechnology ,General Chemistry ,Crystal structure ,Condensed Matter Physics ,Copper ,Catalysis ,Copper sulfide ,chemistry.chemical_compound ,Adsorption ,chemistry ,Chemical engineering ,Thiourea ,General Materials Science - Abstract
Hierarchically structured hollow microspheres composed of copper sulfide (CuS) nanoplatelets have been successfully fabricated via a one-pot and green sonochemical process for the first time, using copper acetate and thiourea aqueous solution as precursors without surfactant or template. Large-scaled hollow architectures with outer diameters in the range of 1–1.2 μm are assembled by pure hexagonal single crystalline CuS nanoplatelets, being of about 20 nm in thickness with stacking faults in the crystal lattice. The UV-Vis diffuse reflectance spectra (DRS) analysis suggests that the band gap energy of the as-obtained CuS sample was estimated to be 1.27 eV, showing a significant red-shift compared with the bulk value. Hollow CuS structures possess the high surface area and double pore size distributions as measured from the N2 adsorption isotherms. Moreover, the possible growth mechanism for CuS hollow spheres is proposed on the basis of the temporal evolution controlled experiments. More importantly, this hierarchically structured CuS catalyst show highly efficient Fenton-like catalytic activity in degrading highly concentrated dye-containing solution (50 mg·mL−1) with the help of hydrogen peroxide (H2O2), suggesting a promising application in wastewater purification.
- Published
- 2014
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