Tunable synthesis of cage-like Co3O4/N–C composite and nest-like Co3O4 for oxidative degradation of Bisphenol A

• Published in: Journal of solid state chemistry Vol. 304; p. 122550
• Main Authors: Bai, Lei, He, Jiaxin, Liu, Lei, Guan, Zhongyue, Wang, Guiling
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.12.2021
• Subjects: Bisphenol A; Cage-like Co3O4; Catalytic oxidation; Cobalt organic framework; Bisphenol A; Cage-like Co3O4; Catalytic oxidation; Cobalt organic framework
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2021.122550

The ZIF-67 crystals synthesized in anhydrous ethanol were directly calcined in air to obtain cage-like Co3O4/nitrogen doped carbon (Co3O4/N–C) composite and nest-like Co3O4 aggregate, respectively, by mediating the calcination temperature in air. The structure of the calcined samples was investigated by X-ray diffraction, electron microscope, X-ray Photoelectron Spectroscopy and so on. It was suggested that the existence of N doped carbon in the cage-like Co3O4 was received at lower temperature. The two nanocrystals were employed as catalysts for the oxidative degradation of Bisphenol A (BPA) in the presence of persulfate and the results indicated that the cage-like Co3O4/N–C with a degradation rate of 0.053 min−1, having a smaller particle size and synergistic effect of Co3O4 with nitrogen-doped carbon, demonstrated a higher persulfate activation and reusability for the degradation of BPA compared with the degradation rate (0.017 min−1) of nest-like Co3O4. The present study could provide new insights for the application of metal organic frameworks to synthesize composite nanomaterials for environmental purpose. Cage-like Co3O4/N–C and nest-like Co3O4 was synthesized for the oxidative degradation of Bisphenol A. The degradation rate over cage-like Co3O4/N–C with a smaller particle size and synergistic effect of Co3O4 with nitrogen-doped carbon was about three-fold higher than nest-like Co3O4. [Display omitted] 1)Cage-like Co3O4/N–C and nest-like Co3O4 were synthesized.2)Co3O4/N–C displayed a three-fold higher activity for Bisphenol A degradation compared with Co3O4.3)The enhanced performance was due to the smaller size and synergistic effect of Co3O4 with nitrogen-doped carbon.