期刊论文

纳米氧化镍的制备及其对纤维素裂解催化活性的评价

中文

燃料化学学报

0253-2409

2008

36

1

42-47

10.3969/j.issn.0253-2409.2008.01.008

Foundation item： The Programme of Introducing Talents of Discipline to Universities in China The Science Research Foundation of Hubei Provincial Department of Education, China （ D200618006 ）.

本校为第一机构

采用均匀沉淀法制备了纳米NiO,并利用XRD、BET、TEM对产物进行了表征.结果表明,制备的纳米NiO颗粒呈球形,分散性好,纯度较高,属立方晶系结构,平均粒径约为7.5 nm,BET表面积为187.98 m2/g.同时,以纤维素为催化裂解对象,利用热重分析仪对纳米NiO和微米NiO的催化活性进行了初步评价和比较.结果表明,在微米和纳米NiO的催化作用下,纤维素裂解的活化能分别减少了12.24 kJ/mol和22.42 kJ/mol,导致纤维素分解的起始温度分别降低了10℃和19℃,并且裂解残渣的产率进一步减少.与微米NiO相比较,纳米NiO催化剂表现出更有效的催化活性.

Nano-NiO particles were prepared by using the homogeneous precipitation method, and characterized by using X-ray Diffraction （XRD）, BET and transmission electronic microscope （TEM）. The prepared nano-NiO particles were found to be spherical in shape, could be well dispersed, and demonstrated weak agglomeration. They generally had high purity and a fine crystal phase of cubic syngony with a mean size of - 7.5 tun and specific surface area of 187.98 m~2/g. Meanwhile, evaluation of the catalytic activity of developed nano-NiO particles in pyro...