【摘要】 以分析纯硫酸锌和氧化钕为原料,经处理后在(NH4)2CO3溶液中均匀沉淀,得到含钕的前驱体化合物Zn4CO3(OH)6.H2O,随后高温煅烧得到按物质的量比例约为1∶100的钕掺杂修饰的ZnO超细材料.所得产品颜色白泛微黄、颗粒较小、分散均匀、不分解,不变质,在环境温度为370℃时,对乙醇气体有较好的灵敏度和选择性.并对该工艺的实验原理、方法及实验条件进行了研究.更多还原

【Abstract】 The analytically pure ZnSO4·7H2O and neodymium oxide were used as raw materials,and were homogeneously deposited with ammonian-carboncate(analytical pure) solution.The precursor Nd-doped basic zinc carbonate was obtained after series of chemical treatment.The precursor was calcinated under the air condition of 700 ℃ for 2 h to obtain nano-meter Nd-doped ZnO powders,in which the molar rate of Nd to Zn is 1∶100,the average size of ZnO powders is about 30 nm.The gas sensitivity properties of ZnO paste sensor to ethanol and cyclo-hexane were measured using distribution in static state.The results show that this Nd-doped ZnO materials prepared by this method exhibits high sensitivity and selectivity to ethanol gas at 370 ℃.The mechanism and methods of chemical reaction and the optimal experiment condition were investigated.更多还原