以PEG(Mn=20000)为模板导向剂,尿素为沉淀剂,采用水热热分解法制备了纳米介孔结构的氧化铝纤维,并对其吸附性能进行了研究. 通过X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、热释重仪(TGA)和N2等温脱附吸附分析,考察了介孔氧化铝纤维的相态、结构、形貌、比表面积和介孔特征. 采用选择性催化还原(SCR)烟气脱硝装置对其吸附性能进行了研究. 结果表明:以PEG为模板,采用简单的水热法就可得到(200～300)nm×(8～10)μm的碳酸铝铵纤维;经900℃煅烧2h得到比表面积为316m2/g、平均孔径为2.5nm的η-Al2O3介孔纤维,形貌基本不发生变化;SCR烟气脱硝测试显示,相比商品氧化铝粉末,合成的氧化铝介孔纤维有着更强的吸附性能,它的脱硝效率较之商品氧化铝粉末约提高了15%.
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