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| 1 | Ho^(3+)掺杂铁酸铋的制备及光催化性显示文摘为提高铁酸铋磁性和光催化性能,通过低温热分解前驱体快速制备出可磁分离回收的Ho^(3+)掺杂铁酸铋复合物Bi_(0. 95)Ho_(0. 05)FeO_3纳米颗粒,并用X粉末衍射仪(XRD)、傅里叶红外变换光谱仪(FT-IR)、紫外可见漫反射光谱仪(DRS),磁强计(VSM)和Zeta电位仪等多种手段对物相和性质进行表征,同时以甲基橙(MO)为降解模型,考察溶液的酸碱性和常见无机阴离子共存下其光催化性能。结果显示,产物以R3c相铁酸铋为主,带隙为1. 90 eV,Ho^(3+)掺杂后使铁酸铋的磁性增强了4倍,催化性能提高30%。而该催化剂的催化性能受降解溶液本身酸碱性以及共存阴离子的氧化性与酸碱性的影响。另外,对该催化剂的回收也进行了研究。结果表明,所得催化剂可通过磁分离回收,从而反复利用。 | 李文进 姚威龙 徐嘉鑫 蒋琪英 邓洪权 | 2019 | 应用化学2019，36，1： | 5 |
| 2 | Effect of far infrared radiation ceramics containing rare earth additives on surface tension of water显示文摘A kind of far infrared radiation ceramics was prepared by using silicate minerals, calcium carbonate and silicon dioxide as main raw materials, and cerium nitrate as additive. The structure of the ceramics and far infrared radiation properties on the surface tension of water were characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and a tensiometer, respectively. It was showed that, after being sintered at 1160 °C, the solid solution was formed by CeO2 and Fe2O3, thus the crystal parameters(c/a axis ratio) and interplanar spacing of Fe2O3 increased. The addition of cerium was regarded to improve the far infrared radiation of ceramics, and the maximum emissivity value in the range of 5–20 μm was 0.94. The surface tension of water gradually decreased with increasing radiation time. | 刘洁 孟军平 梁金生 霍晓丽 | 2014 | Journal of Rare Earths2014，32，9： | 5 |
| 3 | Magnetic transitions and butterfly-shaped hysteresis of Sm-Fe-Al-based perovskite-type orthoferrite显示文摘Al doped SmFeO3(Sm Fe1–x Al x O3; 0.0￡x￡0.15; step 0.05) were prepared by double sintering ceramic technique. The obtained samples were crystallized in single phase structure except the sample with x=0.15. The unit cell volume was found to decrease with increasing Al substitution in orthoferrite. The effective magnetic moment(meff) and the Curie constant(C) were calculated from the reciprocal of the molar magnetic susceptibility(χ–1) versus absolute temperature plot and found to attain maximum value for the parent sample. The magnetic behavior showed two different magnetic transitions, viz, Néel temperature(T N) and spin reorientation(T SR) transitions. The M-H hysteresis loop of the parent sample took butterfly-shape as a result of different contributions anisotropies. From the magnetic properties measurements, it was obviously found that B-site cation dilution resulted in a drastic decrease in the magnetization. Surprisingly large value of the coercive field was obtained for the undoped sample; H c=6198.8 Oe. Based on the mentioned results, one can recommend the use of such orthoferrite in magnetic recording media and as pining layer in spin valve for spintronic applications. | M.A.Ahmed N.G.Imam M.K.Abdelmaksoud Y.A.Saeid | 2015 | Journal of Rare Earths2015，33，9： | 4 |
| 4 | Effect of dysprosium substitution on structural and dielectric properties of BiFeO_3-PbTiO_3 multiferroic composites显示文摘0.5BiDyxFe1–xO3-0.5PbTiO3(0.5BDxF1–x-0.5PT)(x=0.00, 0.05, 0.10, 0.15, 0.20) multiferroic composites were prepared by conventional solid state reaction method. Structural characterization was performed by X-ray diffraction and the materials showed tetragonal structure at room temperature. Surface morphology of the composites was studied by a scanning electron microscope(SEM). Frequency and temperature dependence of dielectric constant(εr) and dielectric loss(tanδ) of 0.5BDxF1–x-0.5PT were measured in a wide range of frequency(100 Hz to 1 MHz) and temperature(25 to 400 ℃). The analysis of the study showed that the εr and tanδ decreased with increasing frequency in the given range for all the samples which could be explained through the occurrence of dipole relaxation process. The effect of substitution of rare earth element dysprosium(Dy) showed increase in εr in all the samples prepared for different concentrations from 0.00 to 0.20. An explanation for high value of εr for Dy modified 0.5BiFeO3-0.5PbTiO3(0.5BF-0.5PT) compared to Gd modified 0.5BF-0.5PT was provided. The variation of AC conductivity with inverse temperature found to obey the Arrhenius equation and the composites showed negative temperature coefficient of resistance(NTCR) behavior. The activation energy was found to be in the range from 0.25 to 0.40 eV for all the studied samples. | N.K.Mohanty A.K.Behera S.K.Satpathy Banarji Behera P.Nayak | 2015 | Journal of Rare Earths2015，33，6： | 3 |
| 5 | Structure, Performance, and Application of BiFeO_(3) Nanomaterials显示文摘Multiferroic nanomaterials have attracted great interest due to simultaneous two or more properties such as ferroelectricity,ferromagnetism,and ferroelasticity,which can promise a broad application in multifunctional,lowpower consumption,environmentally friendly devices.Bismuth ferrite(BiFeO3,BFO)exhibits both(anti)ferromagnetic and ferroelectric properties at room temperature.Thus,it has played an increasingly important role in multiferroic system.In this review,we systematically discussed the developments of BFO nanomaterials including morphology,structures,properties,and potential applications in multiferroic devices with novel functions.Even the opportunities and challenges were all analyzed and summarized.We hope this review can act as an updating and encourage more researchers to push on the development of BFO nanomaterials in the future. | Nan Wang Xudong Luo Lu Han Zhiqiang Zhang Renyun Zhang H-kan Olin Ya Yang | 2020 | Nano-Micro Letters2020，12，6： | 3 |
| 6 | Preparation of nanoscaled yttrium oxide by citrate precipitation method显示文摘The nano-Y_2O_3 was prepared from YCl_3 by the citrate precipitation method. The precursor powders were prepared by 0.1 mol/L YCl_3 solution and 0.1 mol/L hydrochloric acid in the presence of 1% surfactant PEG2000, which was dried via an ethanol azeotropic distillation method. The effects of reaction temperature, precursor concentration, hydrochloric acid concentration, surfactant, and calcination temperature on the mean sizes of nano-Y_2O_3 were studied. It was found that the highest yield of precursor was about 70% at the p H value of 5.0, and the yield decreased rapidly at the p H value below 4 or over 6. The reaction temperature revealed no effect on the size of precursor. The optimized precursor concentration and hydrochloric acid concentration were both 0.1 mol/L. Several typical analytic techniques such as particle size analyzer, X-ray diffraction(XRD), thermogravimetric and differential thermal analyses(TG-DTA) and scanning electron microscopy(SEM) were used to determine the characteristics of the prepared nano powders. Homogeneous torispherical nano-Y_2O_3 with the smallest size(20 nm) could be obtained by calcining the precursor powders at 800 oC for an hour. | 陈金清 黄彬 黄超 孙晓琦 | 2017 | Journal of Rare Earths2017，35，1： | 3 |
| 7 | Structural, phonon, mechanical, optical, and thermodynamic properties of stable β-La_2S_3 from first-principles calculations显示文摘The band structures,density of states,phonon,optical properties,and thermodynamic properties of β-La_2S_3 were calculated from first-principles using the plane-wave pseudopotential method.First,the structures were fully relaxed through the first-principles method.Then,the zone-center phonon-mode frequencies were evaluated within the framework of density functional perturbation theory.Properties related to the structure,phonons,optics,elastic constants,and thermodynamics of β-La_2S_3 were reported.The dielectric function,refractive index,absorption coefficient,extinction coefficient,infrared(IR) reflectance,energy,heat capacity,and Debye temperature spectra were also given β-La_2S_3 was a direct-gap semiconductor,and calculation indicated that its energy gap was 0.191 eV.From the phonon spectra,it could be concluded that the lattice dynamics were stable.A strong IR reflection occurred in a range of 0-1000 nm,arising from several strong IR-active modes,resulting in poor transmission properties.Relatively good transmission properties were observed in the range above 2000 nm,with low reflectivity and dissipation due to the absence of IR-active or weak modes. | 张显 桂文华 吴茜 曾庆丰 | 2017 | Journal of Rare Earths2017，35，3： | 1 |
| 8 | 含Gd^(3+)双金属共掺杂铁酸铋的制备及其光催化显示文摘文章以具有多个配位点的多胺羧酸H_(5)DTPA为配体,采用配位前驱体低温热分解方法对铁酸铋进行A位、AB位双金属共掺杂改性,分别制备出铁酸铋粉末Bi_(0.90)Gd_(0.05)M_(0.05)FeO_(3)和Bi_(0.95)Gd_(0.05)Fe_(0.95)N_(0.05)O_(3)(M=Li^(+),Ca^(2+),Al^(3+);N=Co^(2+),Mn^(2+))。利用XRD、FT-IR、SEM、FL、电化学分析等手段研究掺杂离子种类对铁酸铋结构、形貌、光学性质、电化学性质等的影响。结果表明,掺杂后的样品均为两相共存,其中主相为六方R3c型BiFeO_(3),晶粒大小在20 nm左右,第二掺杂离子对铁酸铋结晶度影响较大。同时,以甲基橙(MO)为染料模型进行光降解测试,结果表明,共掺杂后产物的光催化性能均有所提高,其中,Co^(2+)与Gd^(3+)共掺杂催化效果最好,20 mg/L的MO在其催化下光照3 h后降解率能达68%。另外,所有掺杂产物都表现出优良的磁性。 | 邓洪权 林永乐 蒋琪英 周熙 于方 | 2022 | 环境科学与技术2022，45，10： | 0 |
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