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| 1 | Low-temperature electrochemical synthesis and characterization of ultrafine Y(OH)_3 and Y_2O_3 nanoparticles显示文摘Ultrafine Y(OH)3 nanoparticles were successfully deposited from an additive-free 0.005 mol/L YCl3 low-temperature bath on the steel cathode at the current density of 0.5 mA/cm2 and bath temperature of 10 oC. Heat treatment of the prepared Y(OH)3 nanoparticles at 600 oC in air led to the formation of Y2O3 nanoparticles. Thermal behavior and phase transformation during the heat treatment of Y(OH)3 were investigated by differential scanning calorimetry (DSC) and thermogramimetric analysis (TGA). The morphologies, crystal structures and compositions of the prepared materials were examined by means of scanning and transmission electron microscopy (SEM and TEM) as well as X-ray diffraction (XRD) and FT-IR spectroscopy. The results showed that the prepared Y(OH)3 nanoparticles was essentially amorphous and composed of well dispersed ultrafine particles with size of 4 nm. After heat treatment, the obtained oxide product was well crystallized cubic phase of Y2O3 nanoparticles with the grain size of around 5 nm. It was concluded that low-temperature cathodic electrodeposition offered a facile and feasible way for preparation of ultrafine Y(OH)3 and Y2O3 nanoparticles. | Mustafa AGHAZADEH Taher YOUSEFI Mehdi GHAEMI | 2012 | Journal of Rare Earths2012，30，3： | 6 |
| 2 | Electrochemical preparation and characterization of brain-like nanostructures of Y_2O_3显示文摘Nanostructured Y2O3 was successfully prepared via a two-step and template-free method.Firstly,yttrium hydroxide precursor was galvanostatically grown on the steel substrate from chloride bath by direct and pulse current deposition modes.Direct current deposition was carried out at the constant current density of 0.1 A/dm2 for 600 s.The pulse current was also performed at a typical on-time and off-time(ton=1 s and toff=1 s)with an average current density of 0.05 A/dm2(Ia=0.05 A/dm2)for 600 s.The obtained hydroxide films were then scraped from the substrates and thermally converted into final oxide product via heat-treatment.Thermal behaviors and phase transformations during the heat treatment of the hydroxide powder samples were investigated by differential scanning calorimetry(DSC)and thermogravimetric analysis(TGA).The final oxide products were characterized by means of X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR)and scanning electron microscopy(SEM).The results showed that the well-crystallized Y2O3 with brain-and sphere-like morphology were achievable via pulse and direct deposition modes,respectively.It was concluded that pulse current cathodic electrodeposition offered a facile route for preparation of nanostructured Y2O3. | Mustafa Aghazadeh Mojtaba Hosseinifard Mohammad Hassan Peyrovi Behrouz Sabour | 2013 | Journal of Rare Earths2013，31，3： | 5 |
| 3 | 水热合成不同形态氧化钇的制备工艺及生长机制显示文摘以六水硝酸钇(Y(NO3)3·6H2O)为原料,通过调整沉淀剂(NH3·H2O或CO(NH2)2)、分散剂(C2H6O)或模板剂(C3H8O3),采用水热法制备了3种不同形态的微米级氧化钇颗粒,分析了3种形态氧化钇的生长机制。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、能谱(EDS)、透射电子显微镜(TEM)分别对制备过程中的含钇化合物以及含钇氧化物的形态、尺寸与相结构进行表征。实验结果表明:氨水作为沉淀剂与硝酸钇溶液水热反应后生成了棒状Y2NO3(OH)5·1.5H2O,加入丙三醇(C3H8O3)后生成杨桃状Y2(OH)514(NO3)0.86·H2O;以尿素为沉淀剂与硝酸钇和乙醇反应后生成球状Y(OH)CO3。经过煅烧后,3种水热反应产物均转变成为体心立方型Y2O3,其形态分别继承了水热反应产物的棒状、杨桃状和球状形态;Y2O3的晶粒尺寸小,颗粒分布均匀;晶体生长所需能量满足二维生长趋势时形成棒状Y2O3;加入H原子成角度分布的模板剂丙三醇(C3H8O3)形成畅桃状Y2O3;分散剂乙醇(C2H6O)使晶体各个方向均匀生长,形成球状Y2O3。 | 窦彩虹 魏世忠 周玉成 徐流杰 | 2018 | 稀有金属2018，42，8： | 3 |
| 4 | Porous Y_2O_3 microcubes:synthesis and characterization显示文摘In this work,a facile route using a simple solvothermal reaction and sequential heat treatment process to prepare porous Y2O3 microcubes is presented.The as-synthesized products were characterized by X-ray powder diffraction(XRD) ,scanning electronic microscope(SEM) ,en-ergy dispersive spectrometer(EDS) ,thermogravimetric analysis(TG) ,and differential thermal analysis(DTA) .The thermal decomposition process of the Y2O3 precursor was investigated.SEM results demonstrated that the as-prepared porous Y2O3 microcubes were with an aver-age width of about 20 μm and thickness of about 8 μm.It was found that the morphology of the Y2O3 precursor could be readily tuned by varying the molar ratio of S 2 O 82-to Y3+.Y2O3:Eu3+(6.6%) microcubes were also prepared and their photoluminescence properties were investigated. | DENG Bin DING Liwen CHEN Jianjun ZHONG Shengliang | 2011 | Rare Metals2011，30，6： | 0 |
| 5 | 纳米氢氧化钇制备研究进展显示文摘氢氧化钇是一种重要的稀土化合物,在光学、生物标记、催化剂等领域具有广阔的应用前景。本文评述了不同形貌微/纳米结构Y(OH)3的制备现状,包括水热法、溶剂热法、微波法等,概述相关方法的实验过程和形成机理,并对Y(OH)_3纳米材料制备的发展趋势进行展望。 | 王标 陈丙才 叶明富 许立信 金玲 孔祥荣 | 2017 | 安徽工业大学学报(自然科学版)2017，34，1： | 0 |
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