Study on the activity of doped metal-modified water-sodium- manganese ore catalyst to catalyze the degradation of dimethylamine

Abstract Improving the degradation efficiency of VOCs remains a challenge for our industry. Among them, catalytic degradation is an efficient VOCs degradation technology. The synthesis of doped metal-modified water-sodium-manganese mineral catalysts with efficient catalytic performance and stability remains a challenge for the complete degradation of VOPs. Different water-sodium-manganese ore manganese dioxide were prepared by high-temperature calcination and solvent method, and modified by doped metals (Al, Ce, K), and the results showed that the K₂SO⁴⁻MnO₂-M2 catalyst prepared by solvent method had good catalytic activity. By adjusting the metal doping ratio of manganese to potassium and changing the crystal structure of the catalyst, the results showed that the K₂SO⁴⁻MnO₂-M2 (6:10) type had the best catalytic activity. The results showed that the K₂SO⁴⁻MnO₂-M2 catalyst introduced K⁺ ions into the original crystal structure, and it was observed that the ratio of Mn³⁺ to Mn⁴⁺ increased with the insertion of K⁺, indicating that there were more oxygen vacancies, and the concentration of adsorbed oxygen and lattice oxygen increased, which was conducive to catalytic performance and catalytic stability. This study provides a reference for the degradation of volatile organic pollutants by doped modified water-sodium-manganese ore catalysts.