Catalytic wet peroxide degradation of acrylonitrile wastewater by ordered mesoporous Ag/CeO₂: synthesis, performance and kinetics

Abstract

Ordered mesoporous Ag/CeO2 catalysts have been successfully synthesized by a microwave assisted soft template method.

Research on the elimination of low-concentration formaldehyde by Ag loaded onto Mn/CeO2 catalyst at room temperature

“…However, after the addition of Ag, both the average pore diameter and specific surface area of the catalyst decreased, which may be due to the Ag particle entering the pores of the catalyst and affecting the specific surface area and pore diameter of the catalyst. 38…”

“…Type IV isotherms were observed in all three catalysts, indicating that the loading of Ag did not change the mesoporous structure of the catalyst and that the hysteresis loop is related to the mesopores of capillary condensation. 37,38 The pure CeO 2 catalyst exhibits a H 3 hysteresis loop in the range of P / P 0 of 0.4–0.9, indicating that the mesoporous structure of the catalyst is formed by the accumulation of pseudo-particles. 39 The hysteresis loops of Mn/CeO 2 and Ag/Mn/CeO 2 catalysts show H 2 type, indicating that they have different pore structures from a pure CeO 2 catalyst, which may be caused by plugging.…”

Construction of cerium-based oxide catalysts with abundant defects/vacancies and their application to catalytic elimination of air pollutants

“…4(C)–(E), the CeO 2 nanocubes exhibited a cubic structure with dimensions of 30–100 nm, the CeO 2 spindles displayed a spindle shape with diameters of 5–10 μm and widths of 1–2 μm, and the CeO 2 nanospheres showed a well-proportioned spherical shape with a diameter of approximately 170 nm. Other soft templates, such as cetyltrimethylammonium bromide (CTAB), 43 polyethylene glycol, 44 and triblock copolymer F127, 45 have also been studied. Pan et al 43 selected CTAB as the soft template to hydrothermally synthesize CeO 2 nanoplates at 100–160 °C.…”