Catalytic properties of Ce x Zr1–x O2 prepared using a template in the oxidation of CO

Sawdust as an effective biotemplate for the synthesis of Ce0.8Zr0.2O2and CuO–Ce0.8Zr0.2O2catalysts for total CO oxidation

“…Non-modied CZ (SD) and CZ (CTAB) systems were studied in our recent work. 24 The most intense mass loss was observed at 220-280 C for CZ (CTAB) and at 225-425 C for CZ (SD).…”

“…The SEM images of the double CZ systems prepared using CTAB and SD are similar to those presented in ref. 24. Their comparison with the micrographs of the Cu-modied samples presented in Fig.…”

“…The surface texture of the biomorphic systems is drastically different: it reproduces the brous texture of wood sawdust used as a template. 24 Like the CZ (CTAB) samples, the texture of the biomorphic samples does not depend on the calcination temperature.…”

“…The cerium to zirconium ratio in the catalysts (4 : 1) was chosen based on our previous work. 24 Biomorphic Ce-Zr oxide with a Ce : Zr molar ratio of 4 : 1 showed better efficiency in CO oxidation in comparison with higher Zr loaded oxide systems. Impregnated sawdust was dried for 3-4 h at 120 C to produce catalyst precursors, denoted as CZ (SD) and Cu-CZ (SD).…”

“…Carbon monoxide is formed in various industrial processes and during fuel burning in engines. 24 It is one of the main air pollutants, and can cause mortal poisoning. CO is a colorless and odorless gas, therefore its presence in air is difficult to detect.…”