Showing papers by "Yan Wang published in 2011"
TL;DR: In this paper, the structure and morphology of the as-prepared Co3O4 nanoparticles were characterized by powder X-ray diffracton (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), transmission electron microscope (TEM) and N2-sorption analysis.
27 citations
TL;DR: In this article, a-Fe 2 O 3 nanorods with the diameter of 20-10 nm and length of 80-300 nm were synthesized by a simple surfactant-assisted method in the presence of cetyltrimethylammonium bromide (CTAB).
26 citations
TL;DR: In this paper, X-ray diffraction (XRD), transmission electron microscopy, high-resolution TEM, and temperature-programmed reduction techniques were used as supports for CuO/Ce====== Sn1−x� O2 metal oxides.
Abstract: Ce x
Sn1−x
O2 metal oxides were prepared by a citrate method and used as supports for CuO/Ce
x
Sn1−x
O2 catalysts. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy, high-resolution TEM, and temperature-programmed reduction techniques. XRD analysis indicated that the Ce x
Sn1−x
O2 samples maintain the fluorite structure and form a solid solution when x = 0.9 or 0.8. TPR analysis revealed that two kinds of copper species are present on the surface of the Ce x
Sn1−x
O2 support. The catalytic properties of the CuO/Ce
x
Sn1−x
O2 catalysts were evaluated for low-temperature CO oxidation using a microreactor-GC system. The effects of Ce/Sn ratio and CuO loading on the catalytic performance were investigated. The results showed that these CuO/Ce
x
Sn1−x
O2 catalysts are very active for low-temperature CO oxidation. The 650 °C calcined 7 wt%-CuO/Ce
x
Sn1−x
O2 catalyst exhibited the highest catalytic activity.
12 citations
TL;DR: In this paper, mesoporous nanostructured CuO/ZrO2 catalysts were used for low-temperature CO oxidation by using a microreactor-GC system.
Abstract: Mesoporous ZrO2 was synthesized by a simple surfactant-assisted method in the presence of the cationic surfactant cetyltrimethylammonium bromide, and the CuO loaded catalysts CuO/ZrO2 were prepared by a deposition–precipitation method. The obtained products were characterized by means of powder X-ray diffraction, N2-sorption, transmission electron microscopy (TEM), hydrogen temperature-programmed reduction and X-ray Photoelectron Spectroscopy techniques. Their catalytic performance for low-temperature CO oxidation was studied by using a microreactor-GC system. TEM and N2-sorption results showed that the obtained materials possess a mesoporous structure with high-surface area and uniform pore-size distribution. The results of catalytic activity tests revealed that these mesoporous nanostructured CuO/ZrO2 catalysts were very active for low-temperature CO oxidation.
4 citations