Structure and denitration performance of carbon-based catalysts prepared from Cu-BTC precursor
(School of Metallurgy and Environment, Central South University, Changsha 410083, China)
Abstract: Using Cu-BTC prepared by hydrothermal method as precursor, carbon-based catalysts were obtained as model materials for low-temperature DeNOx. These catalysts were characterized by X-ray diffractometry (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDS). The results showed that all carbon-based catalysts held the octahedron shape of Cu-BTC in most parts, and they mainly consisted of face-centered cubic copper. CuOx/C exhibited excellent catalytic activity, and such catalytic activity was further improved with the introduction of Ag. The catalyst with a Cu to Ag mole ratio of 6:1 and an activated temperature of 600 °C showed the best catalytic performance, and its catalytic denitration rate reached 100% at a temperature as low as 235 °C. During the catalytic reaction process, Cu+ mainly played a catalytic role.
Key words: metal organic frameworks; Cu-BTC precusor; carbon-based catalyst; low-temperature denitraion; CO