JOURNAL OF RARE EARTHS
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2023
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IF 4.9
Xiaolei Song,Congzhu Xu,Yuyan Wang,Huizhen Ke,Yonggui Li,Qufu Wei,Xinqun Feng
High magnetic protective fabrics with rare earth Nd doped Fe 3 O 4 nanoparticles were fabricated via a grafting method. The structure, crystal form, and elemental composition of nanoparticles were investigated by transmission electron microscopy, energy dispersive X-ray, X-ray powder diffraction, and X-ray photoelectron spectroscopy. The obtained NdFe 2 O 4 nanoparticles show spherical shape with fine dispersion and reasonable element composition. However, they demonstrate fine superparamagnetic properties with a magnetic saturation value of 29.25 A m 2 /g and low coercivity of 1.902 mT through the vibrating sample magnetometry technique, which can be well developed in magnetic shielding protective applications. Then, the cotton fabrics with plain weave were finished by a proofing rapier loom as a carrier. The NdFe 2 O 4 nanoparticles underwent some appropriate surface modification and then were grafted onto the cotton fabrics by a bridge agent of N , N ′-dissuccinimidyl carbonate. The morphology, structure, dispersion effect, and electromagnetic protective properties of the fabrics were observed through scanning electron microscopy, Fourier infrared spectroscopy, thermogravimetric analysis-differential scanning calorimetry (TG-DSC), and a vector network analyzer. The reliable fabrics with grafting reaction on the interface are expected to have potential applications in the field of electromagnetic protection and biomedicine fields.
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高影响因子
OPTICS COMMUNICATIONS
·
2014
·
IF 1.542
Li Hu,Jinli Zhang,Qiang Yin,Peijie Li,Kai Du
Nd(bfa) 3 (TPPO) 2 , Nd(tta) 3 (TPPO) 2 and Nd(β-nta) 3 (TPPO) 2 (bfa: 4,4,4-Trifluoro-1-phenyl-1,3-butanedione, tta: 4,4,4-Trifluoro-1-(2-thienyl)-1,3-butanedione, β-nta: 4,4,4-Trifluoro-1-naphthyl-1,3-butanedione, TPPO: triphenylphosphine oxide), three kinds of Nd(III) ternary complexes, were synthesized using β-diketonates and triphenylphosphine oxide as ligands. Fluorescence properties (including excitation spectra, emission spectra , emission lifetime, quantum yield, etc.) and thermal stabilities of the complexes were studied. Nd(tta) 3 (TPPO) 2 having the sharpest emission band, highest relative emission intensity and shortest fluorescence lifetime shows that it will be a kind of promising material for applications in near infrared immunoassay, laser active medium and optical fibers .
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Shuo Du,Xiaofu Guo,Jinlong Li,Mengmeng Sun,Yingjie Liu,Qing Ye,Jingtao Bi,Shizhao Wang,Fei Li,Jie Liu,Yeling Zheng,Yingying Zhao
The development of ionic liquids (ILs)-based extractants for the solvent extraction of rare earth elements (REEs) is of great importance but still faces challenges. Based on the molecular structure and thermodynamic characteristics of temperature-responsive ILs (TRILs), a design method for TRILs was developed with the COSMO-SAC solvation model and quantum chemical calculations. A novel dicarboxylate TRILs, 1,6-bis(carboxyethyl)-N,N,N’,N’-tetramethyl-1,6-hexanediamine bis(trifluoromethanesulfonyl)imide ([CM-TMHDA][Tf 2 N] 2 ) was successfully synthesized, along with dihydroxy TRILs 1,6-Bis(hydroxyethyl)-N,N,N’,N’-tetramethyl-1,6-hexanediaminium bis(trifluoromethanesulfonyl)imide ([HE-TMHDA][Tf 2 N] 2 ) and diester TRILs 1,6-Bis(ethyl acetate)-N,N,N’,N’-tetramethyl-1,6-hexanediaminium bis(trifluoromethanesulfonyl)imide ([EA-TMHDA][Tf 2 N] 2 ) reported in literatures. By combining experimental and molecular simulation analyses, the phase behavior of [CM-TMHDA][Tf 2 N] 2 and the effects of acids and inorganic salts on its phase behavior were systematically studied. Additionally, a temperature-controlled phase transition system composed of TRILs and aqueous solutions was developed for the extraction and separation of Nd(III) from aqueous solutions. The results indicated that the homogeneous extraction system constructed with TRILs reduced interfacial mass transfer resistance, significantly enhancing the extraction kinetics of Nd(III). Various experimental parameters were optimized, revealing that under the conditions of 80 °C for 30 min, the carboxylic functionalized IL achieved optimal extraction efficiency for Nd(III), reaching 56 %. After four cycles, the extraction performance of [CM-TMHDA][Tf 2 N] 2 maintained. This study provides new insights for improving the separation and extraction techniques of REEs, demonstrating substantial potential for applications in this field.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Hao Wu,Guoxiang Wang,Xinxin Zhang,Qingwang Min,Jiacheng Wang,Dazhi Wang,Longsheng Cao
Water electrolysis is one of the most promising green hydrogen production technologies. However, using precious metal materials as electrodes for these electrolyzers incurs high costs. To address these challenges and simultaneously retain the catalytic activity of precious metals, we synthesize a low-iridium catalyst, Nd–IrO 2 . At 10 and -10 mA/cm 2 , this catalyst exhibits 233 and 36 mV overpotentials. Nd – IrO 2 maintains stability over prolonged operation in acidic environments, as evidenced by its consistent overpotential. Advanced calculations using density functional theory (DFT) have demonstrated that incorporating Nd and an ample amount of oxygen vacancies can modulate the d-band center of Ir and reduce the adsorption energy of electrochemical reaction intermediates. In summary, we present the synthesis of a low-iridium catalyst, which provides valuable insights for the design and development of catalysts with improved electrocatalytic performance.
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高影响因子
HYDROMETALLURGY
·
2016
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IF 2.29
Zhang Peng,Dong Linfei,Zhang Dongxiang,Lei Shi,Hongmei Yang,Jinying Li,Wang Yaling,V.V. Tarasov
Calix[4]arene derivatives including diethyl phosphite groups were used for the first time for separating Nd(III) from nitrate media. Calix[4]arene derivatives were synthesized and characterized by infrared spectroscopy (IR), mass spectroscopy (MS), and 1 H NMR. Four calix[4]arene derivatives, CalixF (①), DCalixF (②), PCalixF (⑤), and POCalixF (⑥), were used in a solvent extraction method. The effects of aqueous acidity, diluent, temperature, shaking time, and Nd(III) concentration were investigated. The results showed that the extraction ability of ⑤ and ⑥ with a phosphate functional group at the upper rim were best for the extraction of Nd(III). Derivative ⑥ had better complexing capacities than ⑤ for the generation of a phenolic hydroxyl group at the lower rim. The enthalpy (∆ H O ), Gibbs free energy (∆ G O ), and entropy (∆ S O ) changes for the extraction were obtained from a thermodynamic study. The results showed that the extraction of Nd(III) from a nitric acid system might be an endothermic reaction since the process was naturally spontaneous and increasing the temperature during extraction was determined to be thermodynamically feasible. The extraction of Nd(III) was governed by a two-stage chemical reaction and diffusion process. In the first stage, the process was controlled by a fast chemical reaction at the liquid-liquid interface. The composition of the Nd(III)-calix[4]arene derivative complex was determined to be [Nd(NO 3 ) 3 ] 2 [L]. The second stage was the diffusion of extracted products towards equilibrium. Calix[4]arene derivative ⑥ was found to be an efficient extractant for the separation of Nd(III) and would be a potential extractant for the disposal of radioactive waste in spent fuel .
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Nanophotonics
·
2020
·Vol. 9
·期 8
·2407-2414
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IF 7.491
Yuan Liu,Gongxun Bai,Li Jiang,Youjie Hua,Liang Chen,Shiqing Xu
Ultrathin two-dimensional (2D) materials have drawn great attention in recent years due to their promising applications in biomedicine and atomically optoelectronic devices. In this work, we have fabricated a 2D In 2 Se 3 nanosheet doped with Nd 3+ ions via the two-step method of solid phase synthesis and liquid exfoliation. Owing to the special inner 4f-4f energy level transitions, lanthanide ions can emit photons with almost the same energy in different environments. Here, a stable near-infrared luminescence from Nd 3+ -doped 2D In 2 Se 3 nanosheets has been realized, which includes emission bands around 910, 1057, and 1324 nm. The doping of Nd 3+ ions extends the emission region of In 2 Se 3 nanosheets. Moreover, the photoluminescence mechanism of Nd 3+ ions was investigated through a series of optical measurements. This work not only provides a reliable method to fabricate lanthanide ion-doped 2D materials but also possesses a great significance for luminescence study of lanthanide ions in the 2D matrix.
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高影响因子
CERAMICS INTERNATIONAL
·
2013
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IF 1.789
Huiquan Li,Yumin Cui,Wenshan Hong,Suhua Fan,Liangjun Zhu
Pr/In/Nd composite oxides with different Pr/In/Nd ratios were successfully prepared using a simple solid state reaction at 873 K. The composites were characterized by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area measurements, photoluminescence (PL) spectra and UV–vis diffuse reflection spectroscopy (UV–vis DRS). The photocatalytic activity of Pr/In/Nd composite oxides was investigated by the degradation of methyl orange (MO) in an aqueous solution under UV and visible light irradiation. It is found that compared with pure In 2 O 3 , the absorption intensity of the Pr/In/Nd composite oxide (Pr/In/Nd=1:8:1) increases in the 200–800 nm light region and the absorption edge has a shift to longer wavelength. In addition, the Pr/In/Nd composite oxide (Pr/In/Nd=1:8:1) shows higher UV and visible light photocatalytic activities than pure In 2 O 3 . The remarkably enhanced photocatalytic activities could be mainly attributed to the fact that proper introduction of Pr 2 O 3 and Nd 2 O 5 increased the BET surface area of In 2 O 3 , improved the separation efficiency of photogenerated electrons and holes, and enhanced the absorption intensity in 200–800 nm light region. The effect of various radical scavengers on the degradation of MO showed that OH, O 2 − , h + and H 2 O 2 , especially O 2 − , jointly dominated the photodegradation process of MO under UV light irradiation.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2019
·
IF 1.795
Dongfang Hou,Fan Tang,Bingbing Ma,Min Deng,Xiu-qing Qiao,Dong-Sheng Li
A series of BiYO 3 and rare earth doped BiYO 3 nanotubes have been fabricated through a simple and economical electrospinning technique with subsequent calcination for the first time. The average diameter of the nanotube was approximately 200 nm. It is found that the Nd-doped BiYO 3 nanotubes exhibit an excellent multi-functionality of catalytic and visible-light-driven photocatalytic activities , thus the reduction of 4-Nitrophenol and degradation of Congo red can be rapidly achieved. The enhanced activity was attributed to the one-dimensional tube-like architecture, relatively appropriate band gap and Nd doping, which could be favorable for light harvesting, matter diffusion, and carrier transfer. This work may raise more detail research of BiYO 3 and also broaden its application in many fields.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2014
·
IF 3.209
Jimin Du,Zhiyong Wang,Guoyan Zhao,Yongteng Qian,Huijuan Chen,Jie Yang,Xinghui Liu,Kaidi Li,Chenxi He,Weimin Du,Imran Shakir
Herein, we report a facile route of synthesis that includes sol–gel method followed by the high temperature calcination with the aim to synthesize porous Sn/Nd-codoped TiO 2 monoliths with crystallized anatase walls using polystyrene spheres as template. Our results showed that both Sn and Nd dopant were well dispersed in the host matrix of the final product. Moreover, this as-synthesized porous Sn/Nd-codoped TiO 2 composite showed relatively narrow band gap compared to the pure anatase phase of TiO 2 , which may have its origin from the contributions from the Sn 4+ and Nd 3+ impurities. Interestingly, beside the narrowing of band gap in the codoped TiO 2 , the doping also have a positive effect to help reduced the charge recombination rate, which can be seen from the enhanced lifetime of photogenerated electrons/hole pairs. Finally, the photocatalytic activity of this interesting porous Sn/Nd-codoped TiO 2 monolith was examined by carrying out the dye degradation experiments on methyl orange under UV–vis irradiation. The porous Sn/Nd-codoped TiO 2 monolith showed better catalytic activity than the pure TiO 2 and Degussa P25 due to its narrow band gap, reduced photoinduced h + /e − pair recombination rate, and relatively large surface area. The synergistic combination of doping and surface area enhancement (porous structure) can be adopted as a promising material design strategy to develop photocatalyst materials for degradation of organic pollutants.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2011
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IF 2.089
Yu-Feng Hu,Xiao-Ming Peng,Shan Ling,Jin-Zhu Zhang,Chuan-Wei Jin
Conductivities were measured for the ternary systems Y(NO3)3 + Ce(NO3)3 + H2O, Y(NO3)3 + Nd(NO3)3 + H2O, and Ce(NO3)3 + Nd(NO3)3 + H2O and their binary subsystems Y(NO3)3 + H2O, Ce(NO3)3 + H2O, and Nd(NO3)3 + H2O at (293.15, 298.15, and 308.15) K. The measured conductivities were used to test the generalized Young’s rule and the semi-ideal solution theory. The comparison results show that the generalized Young’s rule and the semi-ideal solution theory can yield good predictions for the conductivities of the ternary electrolyte solutions, implying that the conductivities of aqueous solutions of (1:3 + 1:3) electrolyte mixtures can be well predicted from those of their constituent binary solutions by the simple equations.
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高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Shah Noor,Xiaoshuai Yu,Chunlin Li,Lei Sun,Zibo Zhao,Yan Liu,Chun Cheng Yang,Guoyong Wang
The rational design of high-performance electrocatalysts is essential for promoting the industrialization of electrocatalytic water-splitting technology. Herein, nitrogen-defects (Nd)-enriched g-C 3 N 4 (CN)-supported cobalt single-atom catalysts (Co-Nd/CN) are fabricated as high-efficiency bifunctional electrocatalysts for water splitting. Abundant Nd improves substrate conductivity and modulates the electronic structure of Co-N x active sites simultaneously. Benefiting from abundant coordination sites, lower charge transfer dynamics, and surface reactions, the optimized Co-Nd/CN exhibits the lowest overpotentials of 172 and 310 mV vs. RHE for HER and OER, respectively, at 10 mA cm −2 . Additionally, Co-Nd/CN delivers a full-cell voltage of 1.53 V at 10 mA cm −2 for overall water splitting with a Faradaic efficiency of 87.5%. Extended durability measurements demonstrate robust catalytic stability for Co-Nd/CN over 100 h of continuous operation. This work puts forward a novel approach based on elemental doping and defect engineering for the design of effective and enduring catalysts for water splitting.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 15
·118583
·
IF 6.3
Qinghu Guo,Ting Wang,Jinglong Fan,Yimang Zhao,Xiangyu Meng,Xiaoyi Gao,Zhonghua Yao,Weiping Gong,Hanxing Liu,Hua Hao,Shujun Zhang
Electrostrictive ceramics are crucial for high-precision actuators due to their low hysteresis, fast response, and low heat dissipation. In this work, Nd 3+ was strategically employed to optimize the electrostrictive properties of x Nd-doped Pb(Ni 1/3 Nb 2/3 )O 3 -PbZrO 3 -PbTiO 3 (PNN-PZ-PT) ceramics. A phase transition from the morphotropic phase boundary to a cubic structure, accompanied by enhanced dielectric relaxor behavior was observed with increasing Nd content, which can be attributed to the disruption of long-range ordered ferroelectric domains caused by aliovalent Nd doping-induced local structural heterogeneities—thereby reducing strain hysteresis and enabling improved electrostrictive response. Notably, outstanding electrostrictive strain of 0.105% and high electrostrictive coefficient M 33 = 10.5 × 10 −16 m 2 /V 2 were obtained under a 10 kV/cm for the 3%Nd-doped PNN-PZ-PT ceramic, superior to other relaxor ferroelectric ceramics. Additionally, this composition exhibits outstanding cycling reliability with only 5% strain degradation over 10 6 electrical cycles, positioning it as a promising candidate for precision micro-actuators applications requiring ultra-stable, high-efficiency electromechanical responses.
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高影响因子
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