ACS Nano
·
2025
·
IF 16
Jianqiang Xiao,Kai Yin,Lingxiao Wang,Jiaqing Pei,Xinghao Song,Yin Huang,Jun He,Ji-An Duan
Perovskite quantum dots (QDs) have emerged as revolutionary materials for next-generation display technologies due to their tunable bandgaps, high color purity, and low-cost fabrication. However, challenges persist in outdoor display applications, including poor stability, inadequate weatherability designs, and multicolor integration difficulties. This study proposes a bioinspired “atomic–nano–micro” fabrication strategy based on femtosecond laser direct writing (FsLDW). By synergizing transient laser thermodynamic modulation with surface micro/nanostructural engineering, dual-functional architectures are simultaneously constructed on a polyvinylidene fluoride (PVDF) substrate. The upper layer utilizes laser ablation to generate hierarchical micro/nano structures, forming a lotus-leaf-inspired superhydrophobic surface (contact angle >161°, sliding angle <3°) that provides self-cleaning capability and water-erosion resistance. The lower layer leverages the low thermal conductivity of PVDF to regulate the localized thermal environment, driving directional crystallization of CsPbX3 (X = Cl/Br/I) QDs with in situ halogen composition control, thereby achieving single-step FsLDW-patterned full-spectrum emission (475–690 nm) and high-resolution patterning (∼20 μm). The resulting films retain over 90% of their initial luminescence intensity after simulated outdoor environmental testing and demonstrate exceptional rain-driven self-cleaning properties, effectively resisting pollutant coverage. This strategy offers an innovative solution for developing perovskite-based luminescent devices that integrate high stability, flexibility, full-color display, and weather resistance.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Shuan Tang,Jiawen Luo,Yulu Zhao,Kehao Zhang,Cheng Fang,Mingliang Li,Gang Shao,Hailiang Wang,Hongliang Xu,Hongxia Lu
In this study, a novel medium-entropy perovskite Cs(Pb 1/4 Yb 1/4 Mn 1/4 Ca 1/4 )Cl 3 quantum dots (QDs) were successfully synthesized via high-energy ball milling method. By introducing equimolar amounts of Mn 2+ , Yb 3+ and Ca 2+ cations, the lead content was reduced to 25%. This design of a medium-entropy structure not only preserves the fundamental perovskite lattice framework of CsPbCl 3 , but also introduces abundant intrinsic defects and localized structural distortions. The synthesized medium-entropy QDs exhibit unique dual-band luminescence properties at room temperature: a visible emission centered at ∼600 nm and a near-infrared (NIR) emission at ∼980 nm, attributed to the 4 T 1 → 6 A 1 transition of Mn 2+ and the f-f transition of Yb 3+ , respectively. The entropy-increasing strategy effectively suppresses non-radiative recombination, stabilizes the crystalline structure of the QDs, thereby significantly enhances both the luminescence properties and stability. Specifically, the QDs achieve a photoluminescence quantum yield (PLQY) of 13.22%, a visible fluorescence lifetime of 108.01 μs, and an outstanding NIR fluorescence lifetime of up to 2.20 ms. After 80 days of storage in ambient air at room temperature and atmospheric pressure, the QDs. still retain 77% and 86% of their initial visible and NIR luminescence intensities, respectively. This work provides a feasible new strategy for developing highly efficient and stable multispectral luminescent medium-entropy perovskite materials, expanding their application potential in biomedical and sensor fields.
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OPTICAL MATERIALS
·
2026
·
IF 4.3
Dewei Ma,Xiaoyang Qin,Chengdong Wu
Lead-free copper-based halides have attracted significant attention for optoelectronic applications due to their excellent photophysical properties, good stability, and environmental friendliness. However, current synthesis methods for copper-based halide nanocrystals either require high-temperature inert protection or rely on insulating long-chain ligands, limiting their practical applications. In this study, we report a facile one-pot room-temperature synthesis of Cs 3 Cu 2 X 5 (X = Cl, Br) and CsCu 2 I 3 nanocrystals using an anti-solvent method. Short-chain propionic acid (PA) is introduced as a surface passivation ligand, significantly enhancing photoluminescence through defect passivation. The PA-coated Cs 3 Cu 2 Cl 5 nanocrystals exhibit good resistance to ethanol but poor stability in water. To improve thermal stability, PMMA encapsulation is employed, with the composite film retaining ∼90% of initial PL intensity at 80∼90 °C and two-thirds at 150 °C. Time-resolved PL decay measurements confirm that both PA coating and PMMA encapsulation prolong the exciton lifetime. This work provides a green and effective strategy for the synthesis and surface engineering of copper-based halide nanocrystals for environmentally friendly optoelectronic applications.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yutao Zheng,Shualing Ma,Min Lian,Jiujun Zhu,Zhengchun Hu,Peng Du
A series of Sb 3+ -doped Cs 2 NaScCl 6 double perovskites were synthesized to realize bifunctional optical sensing. Upon 337 nm excitation, the designed compounds emitted intense blue emission, whose intensity was dependent on dopant content and the involved concentration quenching mechanism was caused by electric dipole-dipole interaction. The impact of temperature on the luminescence properties of the final products was investigated, implying their good thermal stability. Through analyzing the response of lifetime to temperature, the thermometric properties of the resultant double perovskites were discussed and the maximum relative sensitivity was 0.32% K −1 , with a broad operating range of 303-623 K. Moreover, in-situ high-pressure X-ray diffraction was tested to explore the structural stability of the studied samples. With elevating pressure, a significant spectral blue-shift was observed in the resulting compounds, enabling their potentials in optical manometry. According to the pressure-dependent emission band centroid, the manometric features of the developed double perovskites were characterized, in which its maximum pressure sensitivity was 10.13 nm GPa −1 with a working pressure range of 0.27-6.69 GPa. Our findings demonstrate that the luminescence properties of Sb 3+ -doped Cs 2 NaScCl 6 double perovskites can be efficiently modulated by extreme condition, endowing their applications in optical temperature and pressure sensing.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Wenlong Ma,Hanqi Zhang,Long Zhao,Die Xu,Tongtong Xuan,Xiaojun Wang
Developing high-performance cyan-green phosphors is essential for addressing the long-standing spectral deficiency in full-spectrum white light-emitting diodes (white-LEDs). Here, we report a broadband cyan-green-emitting phosphor, Cs 2 KLuCl 6 :Sb 3+ , synthesized via a facile HCl-assisted solid-state route that supports low-temperature processing and scalable fabrication. Sb 3+ incorporation modulates the electronic structure of Cs 2 KLuCl 6 by narrowing the bandgap from 5.07 to 3.70 eV and inducing pronounced Sb-Cl-Lu orbital hybridization, which stabilizes self-trapped excitons (STEs) and promotes efficient radiative recombination. Under 330 nm excitation, the optimized phosphor exhibits intense broadband cyan-green emission centered at 513 nm with a full width at half maximum of ∼108 nm and a high photoluminescence quantum yield of 82%. The phosphor also demonstrates excellent thermal robustness, retaining 91% of its room-temperature emission intensity at 423 K, with a high thermal activation energy of 0.2874 eV. When integrated with commercial blue- and red-emitting phosphors on a 365 nm LED chip, the resulting white-LED delivers high-quality white light with a color rendering index of 92 and a correlated color temperature of 4671 K, effectively eliminating the cyan spectral gap. These results establish Cs 2 KLuCl 6 :Sb 3+ as a promising cyan-green phosphor for next-generation full-spectrum solid-state lighting.
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Journal of Water Process Engineering
·
2026
·
IF 6.6
Fan Wang,Qi Zheng,Shangpai Wu,Jin Wu,Qiang Wu,Ningchao Zheng,Chengtao Yue,Deqian Zeng,Hiroshi Watabe,Lu Gao,Yuezhou Wei,Xiangbiao Yin
A novel SiO 2 - P -SO 3 Na composite was synthesized via in-situ solution polymerization coupled with chemical grafting. • SiO 2 - P -SO 3 Na exhibits fast adsorption kinetics and high adsorption capacity for Sr(II). • Demonstrates excellent chemical stability and >99% Sr(II) removal efficiency after multiple regeneration cycles. • SiO 2 - P -SO 3 Na enables selective Sr(II) capture from simulated waste streams and natural seawater. • The adsorption mechanism of Sr(II) by SiO 2 - P -SO 3 Na mainly involves cation exchange. Selective removal of radioactive 90 Sr from groundwater and seawater is challenging due to its long half-life, high toxicity, and chemical similarity to other alkali/alkaline earth metal ions. Herein, a silica-based sulfonic acid-functionalized resin (SiO 2 - P -SO 3 Na) with mesoporous architecture, high surface area, and good chemical stability is engineered for Sr (II) capture. It exhibits strong Sr (II) affinity over a broad pH range (1–7). Batch adsorption tests (initial Sr (II) concentration: 20–700 mg/L) showed a maximum capacity of 57.56 mg/g. At an initial concentration of 50 mg/L, the removal rate reached 99.9%, equilibrium was reached within 1 min, and the distribution coefficient ( K d ) was 2.28 × 10 7 mL/g. Dilute HCl enabled quantitative Sr (II) recovery, and >99% removal efficiency was maintained after six cycles. The resin effectively captured Sr (II) even in the presence of competing cations and in real seawater. Continuous-flow column experiments confirmed stable operation, and characterization indicated cation exchange as the primary mechanism. This work provides a robust platform for efficient trace radiostrontium removal in environmental radioactive decontamination. Download: Download high-res image (181KB) Download: Download full-size image
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Jiaqi Chen,Weiye Chen,Xinyi Zhao,Yun Xue,Jianzhang Gao,Yongde Yan
The effective treatment of uranium-containing wastewater is of critical importance for environmental radiological protection and the sustainable development of nuclear energy. Nevertheless, achieving directed uranium separation from highly complex systems remains a significant technological challenge. To address this issue, we developed an innovative carbonate-assisted separation strategy specifically for targeted uranium extraction from ultra-complex matrices (13 metal cations and 4 anions). Following the initial separation, uranium retention rate (>50%) in the aqueous phase substantially exceeded that of competing impurity ions, thereby establishing a favorable basis for subsequent purification stages. The separation factors for Cs and Sr were relatively low (3.7 and 7.6), rendering these two elements the hardest impurities to separate from uranium. The separation factors for the remaining impurities range from tens to tens of thousands, indicating excellent separation performance. Further refinement was successfully accomplished through electrochemical processing, which significantly enhanced uranium purity. And the recovery rate could reach over 99%. Comparative experimental studies demonstrated that increased cation concentrations and operating temperatures markedly enhanced the electrochemical extraction efficiency of uranium. To explore the relative importance of experimental parameters, machine learning analysis employing XGBoost gradient boosting combined with SHAP interpretability methods was conducted, revealing that reaction time and electrolyte concentration exerted the greatest influence on the model’s predictions. Characterization results further revealed that carbonate addition simplified uranium reaction pathways to a single dominant process. Collectively, this study establishes a novel conceptual framework and practical methodology for selective uranium separation in uranium-containing wastewater treatment.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Ningyuan Zhang,Chengxu Li,Xiao Cui,Ye Ma,Yanhang Ma,Ning Wang,Qiming Sun
A universal physical-mixing strategy boosts formic acid dehydrogenation over supported Pd catalysts. • Basic zeolites scavenge CO 2 to enhance formic acid dehydrogenation. • Pd@S-1/1.0CsX achieves a hydrogen production rate of 4269 h −1 . • A CO 2 -deficient microenvironment exposes Pd sites and drives hydrogen evolution. Formic acid dehydrogenation (FAD) is an attractive route for hydrogen release in liquid organic hydrogen carrier systems, but its efficiency is often limited by product accumulation at metal active sites. Herein, we report a simple yet highly effective mixing strategy that markedly enhances FAD by integrating zeolite-encaged Pd nanoclusters with basic zeolites. The resulting bifunctional catalytic system combines the intrinsic activity of subnanometric Pd nanoclusters with the CO 2 -scavenging capability of basic zeolites. As a representative example, the Pd@S-1/1.0CsX catalyst achieves a hydrogen production rate of 4269 h −1 , nearly threefold higher than that of Pd@S-1. Mechanistic investigations indicate that the basic zeolite acts as a local CO 2 sink, dynamically promoting the transfer of newly generated CO 2 away from the Pd/liquid interface and thereby maintaining a CO 2 -deficient microenvironment around the active Pd sites. This interfacial CO 2 scavenging suppresses product readsorption and local product inhibition, continuously exposing accessible Pd sites without altering the intrinsic reaction pathway. The generality of this strategy is demonstrated across a broad range of supported Pd catalysts. This work highlights microenvironment engineering as a powerful concept for advancing heterogeneous catalysis beyond conventional active-site-centered design. Zeolite-encaged Pd nanoclusters are physically mixed with basic zeolites to create a bifunctional catalyst for formic acid dehydrogenation. The basic zeolite scavenges CO 2 , generating a CO 2 -deficient microenvironment that continuously exposes Pd active sites, shifting equilibrium toward H 2 evolution and delivering nearly threefold higher H 2 productivity. Download: Download high-res image (106KB) Download: Download full-size image
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ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 32
·44199-44208
·
IF 7.8
Bai Songchao,Li Chao,Yang Gang,Shen Pengchao,Liu Chunmiao,Wang Jiwei,Zhu Yongsheng
Lead-free rare-earth metal halides hold great promise for solid-state white-light LEDs, yet efficient and spectrally tunable white emission remains challenging. Herein, we adopt an in situ alloying strategy with Ag + ions to design and synthesize a 0D/3D (Cs 3 LuCl 6 /Cs 2 AgLuCl 6 ) rare-earth halide heterostructure doped with Bi 3+ ions. The favorable type-I band alignment and built-in electric field drive efficient interfacial charge transfer, thereby significantly boosting radiative recombination. The heterostructure yields dual-peak self-trapped exciton emissions at 440 and 590 nm, with a photoluminescence quantum yield of up to 92.12%. By tuning the Bi 3+ doping concentration, the correlated color temperature can be continuously tuned across the white-light region. The corresponding phosphor-converted white LEDs achieve a color rendering index exceeding 90, excellent thermal stability, and 90% luminance retention after 100 h of operation. These findings provide new insights into the design and fabrication of high-performance white light-emitting luminescent materials for solid-state lighting.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 22
·1786
·
IF 3.2
Li Qing,Guo Kaixin,Liu Bowang,Zhang Xin,Cui Ruirui,Wang Xu,Deng Chaoyong
Lead-free halide double perovskites are attractive luminescent materials owing to their low toxicity and structural stability, but their white-light performance is often limited by weak long-wavelength emission and inefficient energy regulation. Herein, Sb 3+ single-doped and Sb 3+ , Mn 2+ co-doped Cs 2 NaLuCl 6 phosphors were synthesized by a hydrothermal method. Sb 3+ introduces broadband blue emission associated with localized excited states, while Mn 2+ incorporation produces orange-red emission through the 4 T 1 → 6 A 1 transition. The coexistence of these two emission components enables tunable dual-emission and single-host white-light generation. Time-resolved PL analysis confirms the shortening of the Sb 3+ -related lifetime after Mn 2+ incorporation, and the energy-transfer efficiency reaches 31.25% for the optimized Cs 2 NaLuCl 6 : 0.005Sb 3+ , 0.05Mn 2+ sample. Temperature-dependent PL and Arrhenius analysis reveal improved thermal-quenching resistance, with the activation energy increasing from 0.13777 to 0.21293 eV. The optimized phosphor-based WLED exhibits neutral-white emission with CIE coordinates of (0.3287, 0.3565), a CCT of 5688 K, and a CRI of 72.4. These results provide insight into emission regulation and energy-transfer dynamics in Sb 3+ , Mn 2+ co-doped Cs 2 NaLuCl 6 phosphors for proof-of-concept white-light and optical anti-counterfeiting applications.
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Small Methods
·
2026
·
IF 8.7
Xinlin Li,Jiaxing Liu,Junxin Wang,Xiaodan Mei,Junchun Li,Guoqing Tong,Hongbang Liu,Tao Lin
High spatial resolution and sensitivity are critical performance metrics for x-ray imaging systems. Traditional thick polycrystalline scintillators suffer from severe internal light scattering, which limits imaging resolution and low-dose detection capability. Here, we present a pixelated scintillation screen with a waveguide architecture based on a Si-SiO 2 array (SOA) template, in which crystalline Cs 5 Cu 3 Cl 6 I 2 , a low-dimensional perovskite-like halide, is used as the scintillation medium. The low-refractive-index SiO 2 layer enables total internal reflection (TIR) for vertical photon guidance, while the Si substrate provides both high x-ray transmittance and visible light absorption, effectively reducing optical crosstalk. Using a vacuum-assisted infiltration process, Cs 5 Cu 3 Cl 6 I 2 is infiltrated and recrystallized within the SOA channels, yielding a well-confined scintillator structure that suppresses lateral scattering and enhances vertical photon transport. Compared to conventional film-based scintillators, the SOA-based design exhibits markedly improved imaging performance, achieving a spatial resolution of 20.10 lp·mm −1 and a minimum detectable dose of 35 nGy·s −1 . In addition, the fabrication process is highly scalable, allowing flexible construction of scintillator arrays with tailored pixel sizes and layouts. This approach provides a promising strategy for next-generation x-ray imaging with simultaneously high resolution and low-dose sensitivity.
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Materials Today Chemistry
·
2026
·
IF 7.4
Qing Li,Bowang Liu,Kaixin Guo,Ruirui Cui,Xu Wang,Chaoyong Deng
Mn 2+ ,Sb 3+ co-doping enables excitation-dependent afterglow in CsCdCl 3 phosphors. • Mn 2+ ,Sb 3+ co-doping prolongs CsCdCl 3 afterglow compared with singly doped samples. • Multi-dimensional optical encoding based on excitation- and time-dependent afterglow enables dynamic anti-counterfeiting. Excitation-dependent persistent luminescence materials attract growing interest for optical encryption, as emission colour and decay behaviour enable multi-parameter information encoding. Achieving high brightness, stable afterglow over a wide temperature range, and controllable emission output within a single material system remains challenging. In this work, CsCdCl 3 : Mn 2+ , Sb 3+ phosphors are synthesized via a room-temperature solution method, which offers a simple and scalable route. The materials exhibit distinct afterglow responses under ultraviolet excitation at 254, 310, and 365 nm. Sb 3+ exhibit cyan emission originating from the 3 P 1 → 1 S 0 transition, while Mn 2+ gives rise to orange-red emission ( 4 T 1 ( 4 G) → 6 A 1 ( 6 S)), sensitized by energy transfer from Sb 3+ to Mn 2+ . The relative contributions of these emission centres vary with excitation wavelength. Excitation-dependent afterglow decay behaviour is therefore achieved. Thermoluminescence analysis reveals a quasi-continuous trap distribution. This distribution supports stable afterglow over a wide temperature range. It also determines the decay behaviour. Excitation-dependent trap filling causes variations in afterglow lifetime. Time-resolved luminescence output is achieved. These properties enable dynamic optical anti-counterfeiting. Information is encoded and decoded through excitation wavelength, emission colour, and afterglow duration. Multi-dimensional and time-dependent data display is realised. This work offers great potential for designing persistent luminescence materials for advanced optical encryption applications.
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