發(fā)布時(shí)間：2018-06-22 13:28

  本文選題：鈰鋯儲(chǔ)氧材料 + 制備��； 參考：《功能材料》2017年07期

【摘要】：研究采用共沉淀水熱回流法,在聚四氟乙烯反應(yīng)器中合成系列鈰鋯固溶體儲(chǔ)氧材料;研究水熱回流時(shí)的pH值對(duì)合成鈰鋯固溶體儲(chǔ)氧材料的影響。用XRD、低溫N_2吸附-脫附和H_2-TPR等手段對(duì)合成樣品的物化性能進(jìn)行表征,結(jié)果表明,在研究的pH值范圍內(nèi),控制水熱回流時(shí)溶液的pH值為11時(shí),合成鈰鋯固溶體的性能最佳,經(jīng)600℃焙燒5h后,其比表面積最高可達(dá)91.1 m~2/g,孔半徑集中分布在3.9nm左右,總孔體積為0.22cm~3/g;且其具有最低的還原溫度,儲(chǔ)氧量為309μmol/g。此外,經(jīng)1 100℃焙燒5h后仍無(wú)晶相分離現(xiàn)象,說(shuō)明其具有良好的熱穩(wěn)定性能。
[Abstract]:A series of cerium-zirconium solid solution oxygen storage materials were synthesized in a polytetrafluoroethylene reactor by co-precipitation hydrothermal reflux method, and the effect of pH value on the synthesis of ceria-zirconium solid solution oxygen storage material was studied. The physical and chemical properties of the synthesized samples were characterized by means of XRD, low temperature NST2 adsorption-desorption and H\ +\ {-2\} TPR. The results showed that, in the range of pH value studied, when the pH value of the solution was controlled at 11:00 when the hydrothermal reflux was controlled, the property of the cerium zirconium solid solution was the best. After calcined at 600 鈩，

本文編號(hào)：2052980