α-Cr2O3纳米棒的制备及其催化性能

以十六烷基三甲基溴化铵为表面活性剂(CTAB),乙酰丙酮铬为铬源,于180℃下用水热法合成了α-Cr2O3纳米棒.用TG-DSC及红外对中间体乙酰丙酮铬进行了表征.通过XRD衍射分析,表明产物Cr2O3为α相六方晶型结构.扫描电镜观察剑纳米棒的直径约为70～80nm,长度约为0.5～1.2μm.DTA数据表明,Cr2O3纳米棒对RDX的热分解具有催化作用.经退火处理的Cr2O3纳米棒能有效促进RDX的分解,使分解温度前移10 C.

Preparation and Catalysis Properties of Cr_2O_3 Nanorods

The α-Cr2O3 nanorods were synthesized by the hydrothermal route at 180 ℃ through the reaction of chromium (Ⅲ) acetylacetonate as the source of chrome and the cetyltrimethylammonium bromide (CTAB) as surFactant. The chromium (Ⅲ) acetylacetonate as the intermediate was characterized by TG-DSC and IR. The X-ray diffraction results showed that the product was α-Cr2O3 with hexagonal crystal structure. The SEM images showed that the diameter of the nanorods was 70-80 nm and length was 0.5-1.2μm. The DTA data showed that the original Cr2O3 nanorods had catalytic activity on the thermal decompositiom of RDX. Moreover, the annealed Cr2O3 nanorods could accelerate the thermal decomposition process of RDX obviously and make the decomposition temperature of RDX decrease by 10 C.