CAJ | 학술논문

采用水热法,以十六烷基三甲基溴化铵(CTAB)为表面活性剂,在160℃的条件下,用乙醇还原KMnO4合成了四方柱γ-MnOOH纳米棒.粉末XRD衍射表明合成的材料为单斜的γ-MnOOH晶体结构,扫描电镜观察到四方柱纳米棒的直径为几十纳米,长度几微米;纳米棒的形貌随CTAB用量增加趋于均一.催化活性测试表明γ-MnOOH纳米棒在120℃的低温下可以将甲醛完全氧化为CO2和H2O.
채용수열법,이십륙완기삼갑기추화안(CTAB)위표면활성제,재160℃적조건하,용을순환원KMnO4합성료사방주γ-MnOOH납미봉.분말XRD연사표명합성적재료위단사적γ-MnOOH정체결구,소묘전경관찰도사방주납미봉적직경위궤십납미,장도궤미미;납미봉적형모수CTAB용량증가추우균일.최화활성측시표명γ-MnOOH납미봉재120℃적저온하가이장갑철완전양화위CO2화H2O.
The γ-MnOOH nanorods with tetragonal prism cross section were synthesized by the hydrothermal route at 160 ℃ through reacting KMnO4 with ethanol in the presence of different amounts of cationic surfactant cetyltrimethylammonium bromide (CTAB). The powder X-ray diffraction results reveal that the materials are γ-MnOOH with the monoclinie crystal structure. The SEM observations show that the diameters of the nanorods are several tens of nanometers and lengths of several micrometers, and that the shapes of the tetragonal prism cross section nanorods become more uniform with increasing amounts of CTAB. The catalytic activity of the γ-MnOOH material towards formaldehyde oxidation shows that complete conversion of formaldehyde to CO2 and H2O can be achieved at a temperature as low as 120℃.