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中国化学会第十届全国无机化学学术会议

作者： Jiale Xia Yaping Du Frontier Institute of Science and Technology Xi'an Jiaotong University School of Materials Science and Engineering Nankai University

NaTiO(NTO) is considered as a promising anode material for sodium ion batteries(SIBs) due to its excellent high-rate performance compared with hard carbons. However, the electrochemical performance of NTO is heavily limited by its low electrical conductivity. In this study, we synthesized a series of lanthanide(Ln = La, Ce, Nd, Sm, Gd, Er, and Yb) doped microsized NTO anode materials and systematically studied the electrochemical performance. Compared with pristine NTO, all the doped samples show superior electrochemical performance. Especially, the Yb doped sample not only delivers a high reversible capacity of 89.4 mA h g at 30 C, but also maintains 71.6 mA h g at 5 C after 1600 cycles, nearly twice that of pristine NTO. It is found for the first time that the enhancement in doped samples is attributed to the introduction of lanthanides which induces lattice distortion and oxygen vacancies.

关键词： lanthanide doping oxygen vacancy anode material sodium-ion battery sodium titanate

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Brightening heavily doped upconversion nanoparticles by tuning characteristics of core-shell structures

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Journal of Rare Earths 2024年第5期42卷 947-954,I0005页

作者： Yangyang Niu Zhihao Bao Yuqin Gao Mengchao Guo Jingyao Liu Jinjun Shao Min Lu Ze Yuan Xiaoji Xie School of Flexible Electronics(Future Technologies)&Institute of Advanced Materials(IAM) Nanjing Tech UniversityNanjing211816China

Heavily doped upconversion nanoparticles(UCNPs)potentially have exceptional photon upconversion abilities that are promising for diverse applications,such as lasing and super-resolution ***,heavily doped UCNPs typically can only offer mediocre upconversion luminescence intensity,and there still lacks general guidelines for the design and synthesis of heavily doped ***,in order to boost the upconversion luminescence of heavily doped UCNPs,we studied the influence of characteristics of the core-shell structure on heavily doped UCNPs'upconversion *** find that some empirical guidelines derived from conventional UCNPs are not suitable for heavily doped *** NaYbF_(4):Tm@NaYF_(4) core-shell UCNPs with a high concentration of Yb_(3+)as a representative,our studies reveal that a rather thick inert NaYF4 shell is needed to protect the UCNPs from surface quenching,and the upconversion luminescence may undergo the cooperative sensitization process,which should be due to the highly concentrated Yb~(3+)*** addition,the upconversion luminescence of heavily doped NaYbF4:Tm UCNPs exhibits no obvious dependence on the type of inert ***,our results show that confining both Yb~(3+)and Tm~(3+)dopants in a thin layer(known as theδ-doping strategy)does not work well in the heavily doped ***,we propose a NaYbF_(4):Tm@NaYbF_(4)@NaYF_(4) core-shell-shell structure to enhance the luminescence of heavily doped UCNPs,by weakening the dissipation of excitation energy and strengthening the *** findings should be helpful to establish general design principles for developing the brightest possible UCNPs that can meet the requirements of various applications.

关键词： Luminescence Upconversion Nanomaterials Rare earths lanthanide doping

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维普期刊数据库

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(Sm/Eu/Tm)3+ doped tantalum semiconductor system for photovoltaic and electrochemical functionality amplification

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Journal of Rare Earths 2024年第8期42卷 1586-1594页

作者： Shaan Bibi Jaffri Khuram Shahzad Ahmad Isaac Abrahams Ibrahim A.A Materials and Environmental Chemistry Lab Lab-E21Department of Environmental SciencesFatima Jinnah Women University School of Physical and Chemical Sciences Queen Mary University of London Department of Botany and Microbiology College of ScienceKing Saud University

This work reports the synthesis,characterization,and energy focused applications of the novel lanthanides co-doped tantalum pentoxide hetero-system(Sm3+-Eu3+-Tm3+:Ta2O5).Ln3+-doped Ta2O5express excellent opto-electronic features reflected by the narrow band gap energy of 3.87 *** vibrations confirm the presence of Ta-O-Ta and Ta-O *** synthesized system possesses orthorhombic geometry with 59.46 nm particle *** the smoother and compact morphology,the synthesized material succeeds in augmenting the performance of different systems aimed at energy *** ambient perovskite solar cell device fabricated with the Ln3+-doped Ta2O5as an electron transport layer excels in achieving an efficiency and fill factor of 14.17% and 76% under artificial *** device was marked by the negligible hysteresis behavior showing profound photovoltaic *** electrochemical activity of the Ln3+-doped Ta2O5decorated electrode was evaluated for electrical charge storage potential with pseudocapacitive behavior,With the highest specific capacitance of 355.39 F/g and quicker ionic diffusion rate,the designed electrode excels conventionally used ***-catalysis of water with Ln3+-doped Ta2O5material indicates its capacity for H2production with the lowest overpotential and Tafel slope values of 148 and 121.2 mV/dec,while the O2generation is comparatively *** the stable electrochemical output,this rare earth modified material has the potential to replace conventionally used environmentally perilous and costly materials.

关键词： lanthanide doping Perovskite solar cells Rare earth materials Supercapacitors Water splitting

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