Metal-organic framework and rice husk derived NiCo2O4@SiO2-RH composites for catalytic degradation

Inspired by the concept of low-carbon methods to "treat waste with waste", a strategy of tranferring waste adsorbents to effective photocatalysts was developed. Low-cost rice husks (RHs) as biotemplates were employed to synthesize NiCo₂O₄@SiO₂-RH composite catalysts by in-situ growth and carbonization. The effect of catalyst on the degradation of tetracycline (TC) and formaldehyde (HCHO) was studied. Under the synergistic action of peroxymonosulfate (PMS) and catalyst, 98.9 % of TC solution was degraded within 45 min, and the influence of different factors on the catalytic performance was revealed. In addition, the prepared composite catalysts completely degraded 22.3 ppm formaldehyde (HCHO) within 1130 s. This work provides a feasible scheme of designing high-performance catalytic materials for the reuse of solid waste resources.