JOURNAL OF NUCLEAR MATERIALS
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2025
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IF 3.2
Yuncong Ding,Xinyu Zhang,Xiaorui Xu,Changzu Zhu,Jia Song,Dezhong Wang,Shaoqiang Guo,Wentao Zhou
Investigating electrochemical behavior of lanthanides in molten salt systems is of significant interest for advancing pyroprocessing. This study aims to elucidate the impact of Cs + addition on the electrochemical behavior of CeCl 3 in molten LiCl-KCl eutectic. Several electrochemical methods, including square wave voltammetry (SWV), cyclic voltammetry (CV), chronopotentiometry (CP), open circuit potential (OCP), and linear polarization (LP), were employed to determine the electron transfer number, reversibility, diffusion coefficient, equilibrium potential, and exchange current density. The results show that Cs⁺ has no significant effect on the electron transfer number or the reversibility of the Ce 3+ /Ce reaction. However, the equilibrium potential of Ce 3+ /Ce redox couple shifts negatively with increasing Cs⁺ concentration. Moreover, Cs⁺ led to a reduction of approximately 19.3% in the diffusion coefficient (determined by CP) and an 11.1% decrease in the exchange current density. The relationship between viscosity and diffusion coefficient was further elucidated through molecular dynamics (MD) simulations.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaoman Zhang,Xueliang Zhang,Yehua Zheng,Cancan Li,Xiaodong Zhang,Lefu Mei,Luoxin Wang,Hua Wang,Xiangming Li,Kun Nie
Lead-free halide double perovskites have garnered extensive research attention due to their outstanding environmental protection performance, structural tunability, and excellent photoelectric properties. However, stable multimode luminescent perovskite materials and more extensive application research remain urgent problems to be solved. In this study, holmium-based lead-free double perovskite with good resistance to thermal quenching was successfully synthesized. The up-conversion luminescence (UCL) of perovskite can be regulated by doping Yb 3+ . Moreover, the emission wavelength can be effectively regulated by adjusting the doping concentration of Yb 3+ and the power of the excited laser. In addition, the aramid staple fiber (ACFs) and polyphenylene sulfide (PPS) composite fiber paper, after being modified with lead-free perovskite, exhibits luminescent properties under ultraviolet (UV) light and near-infrared (NIR) light. The modified luminescent fibers maintain their original flexibility and have good luminescent stability. After being stored in industrial acidic gases for 48 h, the luminescent fibers still maintained good luminescence performance, and no obvious luminescence quenching was observed. Surprisingly, the modified composite fibers also have good piezoelectric properties. The piezoelectric properties of perovskite piezoelectric fibers have been significantly improved through the doping of Yb 3+ . Its maximum output voltage is 17 V, and the response time is 9 ms. Perovskite-type piezoelectric fiber devices exhibit good output stability in humid environments. Multimode emission lead-free perovskite and its functional textiles will have strong competitiveness in the fields of flexible wearable fabrics and intelligent sensing and reality.
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CERAMICS INTERNATIONAL
·
2026
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IF 6
Shala Bi,Houjin Hu,Boya Li,Yi Liu,Yongmei Gao,Zhaoyang Chen,Aimin Chang,Peiqing Cai
Lead-free halide double perovskite up-conversion (UC) materials have attracted significant attention due to their unique photoelectric properties and eco-friendly features in the field of optoelectronics and energy research. However, their multimodal excitation mechanisms remain unclear, and research on these materials is still in early development. In this work, Er 3+ , Yb 3+ , Tb 3+ tri-doped lead-free halide double perovskite Cs 2 NaScCl 6 microcrystal (MCs) were synthesized via hydrothermal method. The crystal structure, morphology, and luminescent properties were investigated by X-ray diffraction, scanning electron microscopy, and photoluminescence spectroscopy. The optical characterization reveals that Er 3+ /Yb 3+ /Tb 3+ co-doped Cs 2 NaScCl 6 MCs exhibit green luminescence by dual-mode excitation. When excited by 280 nm ultraviolet (UV) light, the 5 D 4 → 7 F 5 transition of Tb 3+ dominates the characteristic down-conversion (DC) emission at 546 nm. Under the 980 nm near-infrared (NIR) excitation, the MCs emit intense up-conversion (UC) emission of Er 3+ at 550 nm, generated by the 2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 F 9/2 transition. By employing the luminescence intensity ratio between two thermally coupled energy levels of Er 3+ ( 2 H 11/2 and 4 S 3/2 ), a maximum relative sensitivity of 1.201% K −1 was achieved at 303 K. Furthermore, utilizing the green luminescence characteristics under 280 nm/980 nm dual-mode excitation, a digital encoding programming was developed to successfully demonstrate multilevel information encryption/decryption. All results indicate the Cs 2 NaScCl 6 : Er 3+ , Yb 3+ , Tb 3+ MCs have potential in various areas such as optical temperature sensing and anti-counterfeiting applications.
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JOURNAL OF HAZARDOUS MATERIALS
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2026
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IF 10.6
Yudong Xie,Xiaowei Wang,Jinfeng Men,Min Zhu,Chengqiang Liang,Ping Bao,Biao Wang,Zeyu Guo
Efficient removal of Sr 2 + from radioactive wastewater is essential for the safe and sustainable development of nuclear power. Herein, three ferrous oxalatophosphates—(NH 4 ) 2 Fe 3 (HPO 4 ) 2 (C 2 O 4 ) 2 (NFPO), Na 2 [Fe(HPO 4 )C 2 O 4 ] (SFPO), and K 3 [Fe 4 (HPO 4 ) 2 (PO 4 )(C 2 O 4 ) 2 ]∙H 2 O (KFPO)—were synthesized via a one-step hydrothermal route and systematically evaluated for Sr 2+ capture. NFPO exhibited the best overall performance, featuring broad pH tolerance, thermal stability, and reusability. Notably, in the presence of Ca 2+ (optimal background concentration: 50 mg·L –1 ), Sr 2+ uptake was markedly enhanced, reaching equilibrium within 50 min and achieving an experimentally saturated capacity of 308.95 mg·g –1 (313 K). To improve handling and applicability, NFPO was immobilized into polyacrylonitrile microspheres (NFPO/PAN), which maintained effective dynamic adsorption in fixed-bed tests. Characterization results demonstrate that the crystalline framework remains largely preserved during adsorption, with Fe remaining in the divalent state and an ion-exchange trend involving NH 4 + . Density functional theory (DFT) calculations are further used to provide a plausible atomic-scale interpretation: Sr 2+ binding is energetically favored at oxygen-rich interfacial sites, while Ca 2+ can promote Sr 2+ capture by modulating local structure and electrostatic environment. This work highlights ferrous oxalatophosphates as promising adsorbents and provides an experimentally grounded and theoretically supported understanding for Sr 2+ remediation.
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Light-Science & Applications
·
2026
·Vol. 15
·期 1
·87
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IF 23.4
Wang Yingsheng,Dang Peipei,Zeng Zixun,Liu Dongjie,Zhang Guodong,Tian Long,Li Kai,Ma Ping’an,Wei Yi,Lian Hongzhou,Hou Zhiyao,Li Guogang,Lin Jun
Lead-free halide double perovskites (LFHDPs) have gained prominence as eco-friendly optoelectronic materials due to their structural stability and flexible tunability. Lanthanide (Ln 3+ ) ions have rich energy levels, which can endow LFHDP materials with emissions ranging from visible to near-infrared (NIR) region through the ion doping strategy. However, their NIR applications remain limited by narrowband emission and low photoluminescence quantum yield (PLQY) due to weak absorption cross-section. Herein, Cs 2 NaInCl 6 :Ln 3+ were successfully synthesized, and the problem of low absorption of Ln 3+ ions is effectively solved. Incorporating Mo 4+ /Ag + ions achieves a near-unity PLQY and expands the excitation spectrum across the full visible range and a small part of NIR region (250–850 nm). Mechanism analysis revealed synergistic energy transfer pathways involving self-trapping excitons and intermediate energy states of Mo 4+ ion, enhancing both photon absorption and PLQY. The universal applicability of this approach has been validated across Bi-based and multiple lanthanide ions (Ln: Ho, Er, Tm, Yb). These optimized materials demonstrate exceptional broadband emission characteristics suitable for multi-scenario NIR applications, including light-emitting-diodes (LEDs), night vision, imaging, anti-counterfeiting technologies. This co-doping methodology establishes a versatile framework for overcoming inherent limitations in Ln 3+ -activated materials, offering new possibilities for efficient NIR optoelectronic devices.
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JOURNAL OF HAZARDOUS MATERIALS
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2026
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IF 11.3
Junyi Feng,Shiyu Wang,Jiwei Zhang,Mengyi Tang,Xiaodan Zhang,Xuesong Feng,Kaifa Du,Wei Li,Huayi Yin,Bowen Deng,Dihua Wang
The efficient immobilization of radionuclides such as Cs, Sr, Ba, and Ce remains a critical challenge in the safe treatment of radioactive waste salts. Here we report a synergistic lattice incorporation and spatial confinement strategy that enables one-step immobilization of multiple radionuclides within a sodalite framework derived from topotactic transformation of 4 A zeolite. Mechanical blending followed by solid-state sintering at 850℃ for 2 h produces a dense sodalite solidified matrix exhibiting exceptional thermal stability, radiation resistance, acid-alkali tolerance and mechanical integrity. The normalized leaching rates of Cs, Sr, Ba, and Ce were all below 5 × 10 −5 g/(cm 2 ·d) after 28 days. Multiscale characterization combined with density functional theory (DFT) reveals that chemical adsorption, ion exchange, lattice incorporation, and covalent coordination collectively stabilize radionuclides through coupled spatial confinement and lattice immobilization. A prospective life cycle assessment (LCA) confirms that this sodalite operates with markedly reduced carbon emissions and energy demand compared to conventional vitrification and ceramic process. These findings provide a promising low-energy, high-safety pathway for the immobilization and disposal of irradiated nuclear fuels.
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ACS Applied Materials & Interfaces
·
2026
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IF 8.2
Tao Song,Taiyu Li,Yaping Zhang,Xiaoting Zhang,Rongmin Wang,Qiang Wang,Pengfei Song
Elucidating the structural phase transitions and luminescence mechanisms of metal halides is a challenging, yet critical endeavor. Their full potential is in developing materials with tailorable optoelectronic properties and multifunctional applications. In this study, we synthesized two distinct lead-free double perovskites Cs2NaInCl6 and Cs3.4Na0.6InCl7 using identical reactants under different synthesis conditions. We found that the phase transition between these two perovskites can be precisely controlled by adjusting the N, N-Dimethylformamide (DMF) concentration in the solvent. The optical properties and emission mechanisms of these materials were systematically elucidated through a combination of experimental analysis and density functional theory (DFT) calculations. The Sb3+-doped perovskites exhibit remarkable photoluminescence quantum yield (PLQY), with the yellow green-emitting Cs3.4Na0.6InCl7 reaching 90.1% and the blue-emitting Cs2NaInCl6 achieving an impressive 90.3%. By introducing more water solvents, we successfully synthesized orange-emitting crystal Cs2InCl5·H2O:Sb3+. Finally, we fabricated white-light-emitting diodes (WLEDs) by integrating the synthesized blue-, yellow-green-, and orange-emitting crystals with a UV chip. The resulting device demonstrated excellent white light performance, exhibiting a high color rendering index (Ra) of 92.2, a correlated color temperature (CCT) of 5119 K, and CIE coordinates of (0.34, 0.38). This work provides new insights into the luminescence mechanisms of halide perovskites and demonstrates that crystal structure engineering is a feasible and promising approach for tuning their optical properties.
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Journal of Physical Chemistry C
·
2026
·
IF 3.2
Min Wu,Wei Jia,Hebi Zhang,Jianbei Qiu,Hao Wu,Yingjie Zhang
Halide perovskite materials have garnered significant attention due to their outstanding optoelectronic properties; however, their development was limited by their low stability and lithium storage performance. In this study, CsMnCl3·2H2O and CsMnCl3 were synthesized via the solid-state synthesis method and selected to demonstrate the effects of crystalline water on their lattice transformation and electrochemical properties. The results indicate that the presence of crystalline water alters the Li+ insertion/extraction sites, thereby promoting Li+ insertion/extraction kinetics and lattice stability, resulting in the specific capacity of CsMnCl3·2H2O being 103.7 mAh·g–1, which is higher than the 57.7 mAh·g–1 of CsMnCl3 after 200 charge/discharge cycles, and the Coulombic efficiency of both approaching 100%. Besides, the density functional theory (DFT) calculations were used to demonstrate the influence of crystalline water on the halide perovskite lattice. This study not only opens new avenues for optimizing halide perovskite materials as high-performance lithium-ion battery anodes but also provides theoretical support for understanding the Li+ insertion sites in halide perovskite lattices for halide solid-state electrolytes.
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Nature Communications
·
2026
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IF 15.7
Zhou Fengxian,Yang Yingguo,Feng Kai,Hu Zhiping,Wang Pengwei,Luo Ran,Wu Daofu,Zhang Zeyu,Liu Zhengzheng,Xue Zixiao,Ou Zeping,Sun Kuan,He Jin,Du Juan
Recent breakthroughs in three-dimensional (3D) printing of glass have enabled precise shaping of glass structures from macro to microscale while retaining their excellent physical and chemical properties. However, current functional developments in 3D printed glass primarily focus on leveraging its intrinsic optical transparency, with limited exploration of photonics application. 3D-printed glass functionalized by quantum dots (QDs) will hold great promise for creating desired photonic functional macro- and microstructures. However, voxel-precision customization of photonic functions in 3D printed glass by the monodispersed and size-controlled QDs is fundamentally conflict with the high-temperature sintering process required in 3D printed glass. Here, we present a simple, cost-effective method for creating a library of QDs functionalized 3D-printed glasses with tunable UV-VIS-IR photoluminescence (PL) by printing nanoporous glass (NG) followed by low-temperature nanoscale engineering of QDs growth. The integration of uniform and size-controlled QDs imparts 3D printed glass with fine tuning in composition, architecture, and photonic functionalities, while nanoscale engineering of the micro-environment enables precise tailoring of various QDs with enhanced optical performance and stability. This universal approach establishes a benchmark for 3D-printed functional glasses with advanced photonic capabilities.
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Materials Today Chemistry
·
2026
·
IF 6.7
Yang Yu,Ying Jin,Jiatong Wang,Jilong Yao,Haiming Cheng,Zixu Zhang,Longyi Jin
Metal halide perovskites demonstrate excellent photoluminescence and have shown great potential in developing eco-friendly and reversible anti-counterfeiting materials based on polar solvent-induced photoluminescent color changes. However, it remains challenging to simultaneously achieve high quantum yield, excellent stability, and highly sensitive detection of trace polar solvents such as methanol. In this study, a novel terbium-based metal halide 20 % Sb 3+ : Cs 5 TbCl 8 ·6H 2 O was synthesized via solid-phase milling. Sb 3+ doping significantly enhanced its PL performance and stability. The 20 % Sb 3+ : Cs 5 TbCl 8 ·6H 2 O sample showed bright yellow emission with a PLQY of 68.3 % under UV irradiation and reversible water-induced yellow-to-green transition. This enabled the achievement of dual-patterned information encryption and anti-counterfeiting applications by using water-induced 20 % Sb 3+ : Cs 5 TbCl 8 ·6H 2 O and 20 % Sb 3+ : Cs 3 TbCl 6 @PMMA. Furthermore, due to the high charge density of the rare earth ion Tb 3+ and its strong affinity for polar solvents, an ultra-sensitive PL response was achieved for 20 % Sb 3+ : Cs 5 TbCl 8 ·6H 2 O in organic solvents of different polarities. Liquid-phase methanol induced the most pronounced ΔEA value (0.083) among 17 solvents, enabling highly sensitive detection with a limit of 0.01 % after 30 s ultrasonication. Complementary to its solution performance, the material also demonstrated exceptional responsiveness to methanol vapor, where a rapid and reversible PL transition occurred within 7.2 s at 60 °C. This work offers a feasible strategy for designing stimuli-responsive luminescent materials.
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OPTICS AND LASER TECHNOLOGY
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2026
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IF 5
Yujie Chen,Fanlei Qin,Longchi Li,Jianfeng Wang,Karol Bartosiewicz,Xueliang Zhu,Gongxun Bai
Lanthanide-doped double perovskites have emerged as promising candidates for remote optical thermometry owing to their exceptional photoluminescence properties. However, pronounced luminescence quenching at elevated temperatures remain a critical bottleneck for application in high-precision temperature measurements. Herein, we report Yb 3+ /Ho 3+ -doped Cs 2 NaYCl 6 double perovskites synthesized via a solid-phase synthesis method, exhibiting thermally enhanced upconversion luminescence (UCL) and controllable color conversion. By tailoring the lanthanide doping concentration and temperature, the emission color gradually transitions from green to orange. Remarkably, this pattern remains consistent over a wide temperature range of 303–573 K, delivering a maximum relative sensitivity of 1.34% K −1 at 303 K. These features enable thermometers based on fluorescence intensity ratio (FIR) with excellent stability, high sensitivity and visualization capability. More importantly, the system simultaneously realizes thermochromic upconversion switch, opening an opportunity for multifunctional optical devices in sensing, imaging, and smart photonics.
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JOURNAL OF RARE EARTHS
·
2026
·
IF 7.2
Yu Zha,Fangxue Chen,Fanju Meng,Xiancheng Ning,Tianyu Guo,Danxia Liu,Jin Han,Yugeng Wen,Jianbei Qiu
Transition metal ion-activated phosphors are promising candidates for broadband near-infrared (NIR) spectroscopy applications. However, achieving high external quantum efficiency (EQE) and good thermal stability in low-dimensional halide perovskites has presented challenge. Herein, a design strategy based on cerium doping has been developed for realizing high-efficiency broadband NIR tetravalent molybdenum (Mo 4+ ) luminescence to overcome multivalent Mo-related lattice defects and self-absorption. Particularly, Ce 4+ , Mo 4+ -codoped Cs 2 TeCl 6 shows broadband NIR emissions ranging from 800–1300 nm with a full width at half-maximum of 186 nm, high EQE > 50% and good thermal stability (85%@150 °C). Experimental and theoretical studies verify the synergistic effects of breakdown of site symmetry, reduction of lattice defects and relaxation of the spin-selection rule of Mo 4+ . Moreover, gas sensing of toxic toluene with low detection limit and high sensitivity is presented due to strong molecular interaction-induced luminescence quenching. These findings provide new opportunities for broadband NIR spectroscopy applications.
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