CARBON
·
2025
·
IF 11.6
Yadong Li,Yajuan Zhang,Liang Lv,Liuyuan Han,Zhen Guo,Han-Pu Liang,Xilong Wang,Yousheng Yin
The rational design of Pt-based alloy electrocatalysts is vital to improve the durability and performance of proton exchange membrane fuel cells (PEMFCs). However, the instability caused by transition metal leaching and insufficient particle confinement remains a major challenge. Herein, the development of highly dispersed PtFe alloys with rare-earth Gd doping and carbon confinement (PtFeGd x /N–C) by a synergistic strategy of coordination engineering and Gd–O species incorporation is reported. A nitrogen-doped porous carbon support was synthesized via pyrolysis of ZIF-8 precursors containing EDTA-FeNa and Gd(NO 3 ) 3 , yielding uniformly dispersed Gd–Fe oxide domains. Subsequent wet impregnation and in situ alloying with H 2 PtCl 6 generated highly dispersed PtFeGd x nanoparticles. The optimized PtFeGd40/N–C catalyst exhibited a high half-wave potential of 0.94 V and a mass activity of 0.94 A mg Pt −1 , with only 0.5 % activity loss after 100,000 durability cycles. Structural characterizations confirmed strong coordination among Pt, Fe, and Gd, with Gd predominantly present as oxidized species. DFT calculations revealed that Gd and Gd–O doping effectively modulate the Pt d-band center, optimize intermediate adsorption energies, and reduce the reaction barrier to 0.332 eV. This work highlights the synergistic role of rare-earth doping and carbon confinement in enhancing ORR activity and stability, offering a promising strategy for the development of durable Pt-based electrocatalysts for PEMFCs.
研究领域:
电催化
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材料科学
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能量转换
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纳米材料
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计算化学
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DOI
高影响因子
JOURNAL OF MEDICINAL CHEMISTRY
·
2023
·
IF 7.3
Weiyuan Xu,Xinjian Ye,Min Wu,Xin Jiang,Lik Hang Hugo TSE,Yanjuan Gu,Kun Shu,Liuhui Xu,Yong Jian,Gengshen Mo,Jiao Xu,Yinghui Ding,Ruonan Gao,Jianliang Shen,Fangfu Ye,Zhihan Yan,Lixiong Dai
The leakage of gadolinium ions (Gd3+) from commercial Gd3+-based contrast agents (GBCAs) in patients is currently the major safety concern in clinical magnetic resonance imaging (MRI) scans, and the lack of task-specific GBCAs limits its usage in the early detection of disease and imaging of specific biological regions. Herein, ultrastable GBCAs were constructed via decorating chiral Gd-DOTA with a phenylic analogue to one of the pendent arms, and the stability constant was determined as high as 27.08, accompanied by negligible decomplexation in 1 M of HCl over 2 years. A hepatic-specific chiral Gd-DOTA was screened out as a potential alternative to commercial Gd-EOB-DTPA, while combination with functional molecules favored chiral Gd-DOTA as tumor targeting probes. Therefore, the novel chiral Gd-DOTA is believed to be an ideal platform for designing the next generation of GBCAs for various clinical purposes due to its outstanding inert nature.
研究领域:
医学影像学
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分子生物学
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化学
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DOI
PubMed
高影响因子
FUEL
·
2025
·
IF 7.5
Liangzheng Lin,Zhitao Han,Junhao Jing,Shoujun Zhang,Shaoqin Sheng,Sihan Yin,Tingjun Liu,Chuanqiu Gao
Manganese-based mullite-type oxides are widely used in VOCs oxidation, and their catalytic performance can be effectively regulated by modifying the A-site elements. Here, a series of Mn-based mullite catalysts (AMn 2 O 5 , A = Sm, Y, Gd) with different rare-earth elements at the A-site were synthesized via hydrothermal method and applied for methanol catalytic oxidation. The GdMn 2 O 5 catalyst demonstrated optimal low-temperature activity, achieving 98 % CH 3 OH conversion at 150 °C. Comprehensive characterization results revealed that the largest specific surface area (40.08 m 2 /g), highest Mn 4+ /Mn 3+ ratio (0.33), maximum O ads /O lat ratio (1.07), highest concentration of oxygen vacancy and enhanced surface oxygen mobility collectively contributed to the superior catalytic performance of GdMn 2 O 5 . In situ DRIFTS was employed to investigate the intermediate species and catalytic mechanism of GdMn 2 O 5 during methanol oxidation. This study provides an important theoretical basis for the rational design of AMn 2 O 5 catalysts and the catalytic oxidation of methanol by fully leveraging the rare earth cation effect, modification, and optimization.
研究领域:
催化化学
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环境化学
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材料科学
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表面科学
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无机化学
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DOI
高影响因子
Journal of Biomedical Nanotechnology
·
2021
·Vol. 17
·期 8
·1635-1646
·
IF 4.099
Xu Weibing,Zhang Jia,Zhao Minzhi,Yang Zhijie,Wu Qingfeng,Nian Fang
Due to the combination of the high resolution of fluorescence imaging and the no limitation in penetration depth of magnetic resonance imaging, dual-mode imaging of magnetic resonance and fluorescence (MR/FI) have attracted extensive research in recent years. Herein, a novel MR/FI bimodal
imaging probe is facile fabricated by attaching the rhodamine fluorophore covalently to the surface of the Gd-phenolic coordination polymer nanoparticles. The contents of Gd3+ and RB of the as prepared probe are calculated to be 8.2% and 12.5%. The quantum yield of the probe is
about 8.84% as well as red fluorescent emissive. The longitudinal r1 value is 6.94 mM−1 s−1 and the ratio r2/r1 is very low and about 1.22. Subsequently, the and MR imaging and fluorescence both in vitro and In Vivo are performed. The metabolic
pathways In Vivo are inferred by studying the bio-distribution of the probe in major organs. The as-prepared probe exhibits excellent imaging performance and biocompatibility, which is conducive to its further application.
研究领域:
生物医学工程
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纳米技术
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成像科学
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DOI
PubMed
高影响因子
International Journal of Nanomedicine
·
2026
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IF 8.7
Dandan Wang,Wenyi Zhang,Lin Chen,Yunxiao Mai,Haoran Wang,Zhenwei Miao,Yang Zhao
Purpose Gadolinium-based contrast agents (GBCAs), which are indispensable for magnetic resonance imaging (MRI), carry a severe risk of nephrogenic systemic fibrosis (NSF) in patients with chronic kidney disease (CKD), particularly in those with advanced renal impairment. This critical safety concern necessitates the development of biocompatible alternatives that do not compromise diagnostic efficacy.Materials and Methods Inulin-based nanoparticles (Inulin@Gd/Zn NPs) were synthesized by chelating inulin with gadolinium and zinc ions, aimed at being used as contrast agents that can replace conventional GBCAs. The morphology, size, and zeta potential of the nanoparticles were determined. The anti-fibrotic ability of Inulin@Gadolinium/zinc nanoparticles (Inulin@Gd/Zn NPs) was evaluated in vitro and in vivo, as well as their MRI imaging ability and metabolic performance in normal and fibrotic kidneys. A unilateral ureteral obstruction (UUO) model was created in mice and was used to evaluate the in vivo anti-fibrotic efficacy.Results The ultra-small Inulin@Gd/Zn NPs (<10 nm) exhibited high stability and T1 relaxivity. Compared to Gadolinium diethylenetriaminepentaacetic acid (Gd-DTPA), Inulin@Gd/Zn NPs demonstrated precise kidney targeting, excellent T1-weighted MRI capabilities, and rapid renal clearance. In vitro studies showed that Inulin@Gd/Zn NPs had very low cytotoxicity for HK-2 cells up to 100 µM. Further, the NPs were able to reduce reactive oxygen species generation in hydrogen peroxide–stimulated HK-2 cells. Negligible levels of hemolysis and organ toxicity were confirmed in vivo. Further, in the UUO model, administration of Inulin@Gd/Zn NPs was found to significantly inhibit fibrosis. Both in vitro and in vivo experiments demonstrated that Inulin@Gd/Zn alleviated GBCA-induced early tubulointerstitial fibrosis by inhibiting the transforming growth factor-β1 (TGF-β1) signaling pathway.Conclusion Inulin@Gd/Zn NPs represent a promising strategy for clinical application of GBCAs. It addresses the diagnostic and therapeutic challenges in patients with CKD, offering a paradigm shift in the safe application of GBCAs in high-risk populations, indicating the need for further clinical trials to enable clinical applications.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 42
·15413-15421
·
IF 4.39
Jingwei Liu,Yanjie Liang,Shao Yan,Dongxun Chen,Shihai Miao,Weili Wang
Luminescent materials that emit in the narrowband ultraviolet-B (NB-UVB; 310–313 nm) spectral region have attracted considerable attention due to their unique spectral features, which endow them with great potential applications in the fields of photochemistry and photomedicine. However, NB-UVB persistent luminescent materials are relatively lacking, especially materials that are excitable by natural sunlight. Here we report the NB-UVB persistent luminescence of Gd3+ in (Y,Gd)3Ga5O12:Bi3+ garnets by making use of the persistent energy transfer from Bi3+ to Gd3+. The optimal Bi3+ and Gd3+ concentrations for the maximum energy transfer efficiency are determined and persistent NB-UVB light emission with a peak wavelength at 313 nm and an afterglow time of more than 24 h is successfully achieved in the (Y,Gd)3Ga5O12:Bi3+ phosphor. More importantly, the as-synthesized NB-UVB persistent phosphors are also excitable by the widely available natural sunlight and exhibit exceptional NB-UVB persistent luminescence performance. Benefitting from the visible-blind emission feature, interference-free capability from indoor ambient light and self-sustained optical characteristic, the developed sunlight-excitable NB-UVB persistent phosphors here not only hold great promise for covert optical tagging applications, but also open new opportunities for optical data storage in a bright indoor environment.
研究领域:
材料科学
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光物理学
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生物医学工程
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光学成像
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药物递送系统
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 48
·期 15
·22179-22186
·
IF 5.532
Wenqi Yang,Fuxing Ye,Hang Qi
Due to the restriction of CMAS corrosion, the YSZ TBCs are facing great challenges, which accelerates the development of the novel potential thermal barrier materials. This work has investigated the CMAS corrosion resistance of the novel thermal barrier material GdTaO 4 and YbTaO 4 to assess their potential in replacing the traditional YSZ . The results indicate that GdTaO 4 and YbTaO 4 possess excellent phase stability, and there is no phase transition after 150 h sintering at 1350 °C. The crystallization phenomenon has occurred in the residual CMAS when the reaction time is 0.5 h, and the main crystallization product is CaMgSi 2 O 6 . In comparison, when the reaction time increase to 10 h, the crystallization phenomenon has disappeared completely. The maximum reaction layer thickness of GdTaO 4 and YbTaO 4 are ∼10 μm and ∼6 μm after 10 h CMAS corrosion, respectively. The XRD patterns indicate that the main product after 10 h reaction is Ca 2 Ta 2 O 7 . Compared with the CaMgSi 2 O 6 , the Ca 2 Ta 2 O 7 possesses lower formation enthalpy and cohesion energy. With the reaction time rising, the formation of Ca 2 Ta 2 O 7 consumes lots of Ca elements and restrain the formation of CaMgSi 2 O 6 . Besides, the difference of GdTaO 4 and YbTaO 4 in CAMS corrosion resistance is also attributed to cohesion energy. These results indicate that GdTaO 4 and YbTaO 4 exhibit enormous potential to manufacture the novel TBCs in CMAS corrosion resistance compared with the YSZ.
研究领域:
材料科学
·
陶瓷
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热障涂层
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腐蚀抗性
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高温材料
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DOI
高影响因子
DESALINATION
·
2026
·
IF 9.9
Ruijuan Fu,Cai Zhang,Laihong Geng,Rui Jiao,Hanxue Sun,Jiyan Li,Weidong Liang,An Li
Solar interfacial evaporation was coupled with Gd 3+ enrichment and adsorption. • CPM achieved a high evaporation rate of 2.29 kg m −2 h −1 under 1 kW m −2 irradiation. • The membrane showed good salt tolerance and self-cleaning capability. • Phosphate and carboxyl groups enabled selective Gd 3+ capture via Gd O coordination. Efficient purification and resource recovery from wastewater containing low concentrations of rare-earth ions remain challenging for conventional treatment technologies. Solar-driven interfacial evaporation has emerged as a sustainable and promising approach for wastewater treatment. However, its potential for rare-earth ion enrichment and recovery remains largely unexplored. Herein, we developed a phosphorylated nanocellulose/sodium carboxymethyl cellulose/multi-walled carbon nanotube composite hydrogel membrane (CPM) as the multifunctional photothermal material for solar-driven interfacial evaporation-assisted Gd (III) removal and recovery from wastewater. In CPM, multi-walled carbon nanotubes endow the membrane with broadband light absorption and efficient photothermal conversion capability, while phosphorylated nanocellulose and sodium carboxymethyl cellulose jointly construct the hydrophilic layered hydrogel network rich in oxygen-containing coordination sites, including phosphate, carboxyl, and hydroxyl groups, which serve as effective Gd (III)-binding sites. Under one-sun illumination, the CPM evaporator achieved an apparent photothermal conversion efficiency exceeding 120%, a stable water evaporation rate of 2.2 kg m −2 h −1 , and a maximum Gd (III) adsorption capacity of approximately 80 mg g −1 . Moreover, solar irradiation accelerated the adsorption kinetics by driving the interfacial enrichment of Gd (III). This work integrates interfacial evaporation, rare-earth ion enrichment, and in situ adsorption, offering a promising route for the purification and resource recovery of low-concentration rare-earth-containing wastewater. Download: Download high-res image (141KB) Download: Download full-size image
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Mathankumar Ganesan,M. Umar Farooq,Jin Li,M. Krishna Mohan,Fei Wang
The current investigation highlights the successful development of a highly selective and ultra-sensitive nitrogen dioxide sensor at room temperature (28 ℃), employing Gd-doped SnO 2 nanostructures. A facile hydrothermal route prepared the pure and Gd-doped SnO 2 nanostructures. The samples were analyzed using XRD, HR-TEM, XPS, and BET analysis to investigate their structural, core-level morphology, chemical composition, and specific surface area properties. The prepared sensors exhibited superior selectivity towards the NO 2 gas molecule compared to other target gases such as H 2 S, CH 4 , NH 3 , SO 2 , acetone, ethanol, and methanol. Remarkably, the Sn-2 (3 mM) sample shows a superior gas-sensing response of about 186 towards the 10 ppm of NO 2 gas molecule at 28 ℃. At 100 ℃, the Sn-2 (3 mM) sample displays a sensing response of about 3726 towards the 10 ppm of NO 2 gas. In addition, the prepared pure and Sn-2 (3 mM) sensors showed good repeatability and stability. The results will give an alternative way to develop the metal oxide-based (MOS) NO 2 gas sensor for real-time gas monitoring applications. Additionally, DFT gas adsorption studies were conducted to better understand the selectivity performance of the pure and Gd-SnO 2 system, and the results showed good consistency with the experimental findings.
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高影响因子
JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Bing Yu,Guoqiang You,Lei Wang,Kaixuan Zhou,Yong Zhao,Bin Jiang
The Gd-rich cubic phase, which is ubiquitous in Mg-Gd alloys, plays a crucial role in determining their mechanical properties. However, its chemical composition has long been debated, and it has often been misidentified as MgGd or GdO. This study focuses on the origin and hereditary characteristics of the cubic phase. Through multiscale characterization techniques such as X-ray diffraction analysis, scanning electron microscopy, focused ion beam, and transmission electron microscopy, the microstructural evolution of three as-cast Mg-Gd binary alloys and their diluted counterparts (Mg-10 wt% Gd) was systematically investigated. The spatial distribution, crystal structure, and chemical composition of the cubic phase were examined. Microstructural analysis reveals that the cubic phase in the Mg-Gd binary alloy exhibits a face-centered cubic structure (lattice parameter a ≈ 0.5328 nm), and it is identified as GdH 2 . Additionally, trace amounts of α-Gd are detected. Upon dilution to Mg-10 wt% Gd, the GdH 2 phase remains largely undissolved, demonstrating stable hereditary characteristics, whereas the submicron α-Gd phase completely dissolves. The hereditary characteristics of GdH 2 are closely associated with the H content in the melt and the initial microstructure of the Mg-Gd binary alloy. This study resolves the existing controversy regarding the cubic phase, establishing a theoretical foundation for optimizing the design of Mg-Gd alloys and enhancing the strength–ductility synergy.
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DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Feng Qilong,Zheng Wenjing,Pu Jie,Chen Qiaoli,Shao Wei
The availability of colloidal nano-materials with high efficiency, stability, and non-toxicity in the near infrared-II range is beneficial for biological diagnosis and therapy. Rare earth doped nanoparticles are ideal luminescent agents for bio-applications in the near infrared-II range due to the abundant energy level distribution. Among them, both excitation and emission range of Er3+ ions can be tuned into second biological window range. Herein, we report the synthesis of ∼15 nm LiYF4, NaYF4, and NaGdF4 nanoparticles doped with Er3+ ions and their core-shell structures. The luminescent properties are compared, showing that Er3+ ions with single-doped LiYF4 and NaYF4 nanoparticles generate stronger luminescence than Er3+ ions with doped NaGdF4, despite the difference in relative intensity at different regions. By epitaxial growth an inert homogeneous protective layer, the surface luminescence of the core-shell structure is further enhanced by about 5.1 times, 6.5 times, and 167.7 times for LiYF4, NaYF4, and NaGdF4, respectively. The excellent luminescence in both visible and NIR range of these core-shell nanoparticles makes them potential candidate for bio-applications.
研究领域:
材料科学
·
生物医学工程
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DOI
PubMed
高影响因子
CHEMICAL PAPERS
·
2020
·Vol. 74
·期 11
·3987-3993
·
IF 1.68
Pan Binfeng,Zhang Zhimin,Lu Xuchen
Abstract The reaction between rare earth oxychloride (REOCl) and water was investigated. X-ray diffractometer, volumetric titrations, FTIR spectrograph and scanning electron microscope were used to determine the reaction process and the reaction products. It was found that the reaction could be concluded as follows: 5REOCl(s) + 5H 2 O(l) = 2RE 2 (OH) 5 Cl(s) + RE 3+ (aq) + 3Cl − (aq). Based on this reaction, a new method for determining the purity of anhydrous rare earth chloride was proposed. Compared with the conventional method, the maximum absolute error decreased from 22 to < 1% and the maximum relative error decreased from 111 to < 4% under the experimental conditions. Graphic abstract
研究领域:
化学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）