CAJ | 학술논문

采用乙二胺辅助的水热法制备了纳米片聚结的Co3O4微球.利用多种分析技术表征了其物化性质，并评价了其对甲苯燃烧的催化活性.结果表明，由添加1.0 ml乙二胺经140°C水热处理12 h后制得的Co3O4样品呈纳米片聚结的微球状表面形貌. Co3O4微球样品的比表面积约为66 m2 g-1.与体相Co3O4样品相比， Co3O4微球样品具有较高的氧吸附物种浓度和较好的低温还原性.当空速为20000 ml g-1 h-1时，在Co3O4微球样品上甲苯转化率达到50%和90%时的反应温度分别为230和254°C.这与该样品具有较大的比表面积、较高的氧吸附物种浓度和较好的低温还原性相关.
채용을이알보조적수열법제비료납미편취결적Co3O4미구.이용다충분석기술표정료기물화성질，병평개료기대갑분연소적최화활성.결과표명，유첨가1.0 ml을이알경140°C수열처리12 h후제득적Co3O4양품정납미편취결적미구상표면형모. Co3O4미구양품적비표면적약위66 m2 g-1.여체상Co3O4양품상비， Co3O4미구양품구유교고적양흡부물충농도화교호적저온환원성.당공속위20000 ml g-1 h-1시，재Co3O4미구양품상갑분전화솔체도50%화90%시적반응온도분별위230화254°C.저여해양품구유교대적비표면적、교고적양흡부물충농도화교호적저온환원성상관.
Nanoplate-aggregate microspherical Co3O4 was prepared by an ethylenediamine-assisted hydro-thermal route and characterized by means of numerous techniques. Their catalytic activities for toluene combustion were evaluated. The Co3O4 sample obtained using 1.0 ml of ethylenediamine and a hydrothermal treatment at 140 °C for 12 h had a nanoplate-aggregate microspherical mor-phology. This microspherical Co3O4 sample with a surface area of 66 m2 g-1 had a higher adsorbed oxygen concentration and better low-temperature reducibility than bulk Co3O4. Over the Co3O4 microsphere sample, the temperatures required for 50%and 90%toluene conversions were 230 and 254 °C, respectively, at a space velocity of 20000 ml g-1 h-1. The good catalytic performance of the Co3O4 microsphere sample was related to its large surface area, high oxygen adspecies concen-tration, and good low-temperature reducibility.