采用以聚乙二醇(PEG)为表面活性剂的水热法合成了不同Tb/Zr比的TbxZr1-工O2-δ复合氧化物,并用以十六烷基三甲基溴化铵(CTAB)为表面活性剂的共沉淀法合成了Tb0.6 Zr0.4 O2-δ,将其作为不同方法的比较.利用XRD、TG-DTA、HRTEM、SAED和N2吸附-脱附对样品的物相结构、高温热稳定性、样品形貌、晶粒大小及孔结构进行表征.结果表明,当n(Tb)/n(Zr)≥0.6时样品呈现出氧化铽的立方晶体结构,合成的Tb0.6 Zr0.4 O2-PEG的表面形貌为不规则的类球状纳米粒子,粒径为5nm左右,产物的孔径主要集中在7.2nm左右.HRTEM图中明显显示出其晶体中的(111)及(200)晶面.TG-DTA曲线显示温度高于500℃时失重不明显,表明焙烧后的铽锆固溶体具有良好的热稳定性.
参考文献
| [1] | Roberta D M;Kaspar J .Environmental catalysis-agenfle art:CeO2-ZrO2 mixed oxides as a case history[J].Catalysis Today,2005,100:27. |
| [2] | Tarak Mondal;Kamal K Pant;Ajay K et al.Catalytic oxidative steam reforming of bio-ethanol for hydrogen production over Rh promoted Ni/CeO2-ZrO2 catalyst[J].International Journal of Hydrogen Energy,2015,40(6):2529. |
| [3] | Durra G;Waghmare U V;Baidya T et al.Origin of enohaneed reducibility/oxygen storage capacity of Ce1-x ZrxO2 compared to CeO2 or TiO2[J].CHEMISTRY OF MATERIALS,2006,18:3249. |
| [4] | Ellawala K C Pradeep;Teppei Habu;Hiroko Tooriyama et al.Ultra-simple synthetic approach to the fabrication of CeO2-ZrO2 mixed nanoparticles into homogeneous,domain,and core-shell structures in mesoporous spherical morphologies using supercritical alcohols[J].Journal of Supercritical Fluids,2015,97:217. |
| [5] | Zheng Y;Wei Y G;Li K Z et al.Chemical-looping steam methane reforming over macroporous CeO2-ZrO2 solid solution:Effect of calcination temperature[J].International Journal of Hydrogen Energy,2014,39(25):13361. |
| [6] | Wang G Z;Dai H X;Zhang L et al.CrOx/nano-Ce0.60-Zr0.35 Y0.05 O2 catalysts that are highly selective for the oxidative dehydrogenation of isobutane to isobutene[J].Applied Catalysis A:General,2010,375:272. |
| [7] | Dua Y C;Shi S L;He H et al.Fabrication and characterization of Ce0.7 Zr0.3 O2 nanorods having high specific surface area and large oxygen storage capacity[J].Particuology,2011,9:63. |
| [8] | Hu C Q;Zhu Q S;Jiang Z .Nanosized CuO-ZrxCe1-x Oy aerogel catalysts prepared by ethanol supercriticaldrying for catalytic deep oxidation of benzene[J].Powder Techn,2009,194:109. |
| [9] | Petit L;Svane A;Szotek Z;Temmerman WM .First-principles study of rare-earth oxides[J].Physical review, B. Condensed matter and materials physics,2005(20):5118-1-5118-9-0. |
| [10] | Arashi H;Shin S;Miura H et al.Investigations of valence change of Tb ions in ZrO2-Tb4O7 mixed conductor using XANES measurements[J].Solid State Ionicis,1989,35(3-4):323. |
| [11] | Zhang Y J;Deng J G;Zhang H et al.Three-dimensionally ordered macroporous Pr6O11 and Tb4O7 with mesoporous walls:Preparation,characterization,and catalytic activity for CO oxidation[J].Catalysis Today,2015,245:28. |
| [12] | Vidya Y S;Gurushantha K;Nagabhushana H et al.Phase transformation of ZrO2:Tb3+ nanophosphor:Color tunable photoluminescence and photocatalytic activities[J].Journal of Alloys and Compounds,2015,622:86. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%