Carbon nanosphere as an efficient support for CoOx nanoparticles on water decontamination via sulfite activation

Sulfite has recently been considered as the most potential alternative to peroxydisulfate and peroxymonosulfate for wastewater treatment because of its low ecotoxicity, low cost and abundant source. Although all sorts of homogeneous catalysts, such as Co 2+ , Cu 2+ , Fe 2+ , Mn 2+ , and so on, are developed for activating sulfites to generate SO 4 • − , it is of high significance to develop heterogeneous catalysts for wastewater treatment via sulfite activation. Herein, we have employed carbon nanosphere as an efficient support for CoO x nanoparticles on water decontamination via sulfite activation. The comparison with other carbon carriers (including carbon nanotubes and activated carbon) emphasized the vital role of CNS-600 in CoO x /CNS-600 for tetracycline (TC) degradation via Na 2 SO 3 activization. Because CNS-600 presented an uniform structure of nanosphere, with surface nitrogen and oxygen functional groups, which were favorable for Na 2 SO 3 activation and CoO x stabilization. This work proposes an efficient and heterogeneous Co-based nanomaterial for water decontamination via Na 2 SO 3 activization.