CERAMICS INTERNATIONAL
·
2026
·
IF 6
Shuo Wang,Shimin Liu,Jingyi He,Jiangwei Liang,Tianlin Chen,Xuemei Fan,Shiqing Xu
Spectroscopic screening of Mn:CsPbX 3 (X = Cl, Br, I) nanocrystals embedded in a B–Si–Zn–Al glass matrix identifies CsPbCl 3 as a suitable sensitizing host for Mn 2+ emission because of its favorable energy-level alignment. However, achieving efficient Mn 2+ luminescence in CsPbCl 3 -based microcrystalline glass remains challenging due to the intrinsically weak spin-forbidden d–d excitation of Mn 2+ and the difficulty of precipitating CsPbCl 3 nanocrystals within a rigid glass network. In this work, Mn 2+ incorporation is proposed as an effective strategy to facilitate the local crystallization of CsPbCl 3 nanocrystals, as supported by HRTEM lattice-fringe observations, XPS analysis, and photoluminescence evolution. Combined with non-equilibrium kinetic control, rapid water quenching helps preserve a larger population of small and dispersed Mn:CsPbCl 3 luminescent units, thereby enhancing the macroscopic orange-red emission. The corresponding spectral behavior is consistent with host-mediated sensitization of Mn 2+ . Compared with thermodynamic annealing, which improves intrinsic radiative efficiency through structural relaxation and defect reduction, the water-quenched sample exhibits stronger steady-state photoluminescence despite a lower absolute quantum efficiency. This contrast indicates that the enhanced brightness mainly originates from the increased population of active sensitized Mn 2+ -emitting centers rather than from improved intrinsic efficiency of individual centers. These results suggest that coupling Mn 2+ -assisted local crystallization with non-equilibrium water-quenching control provides a feasible route for designing high-brightness orange-red luminescent microcrystalline glasses.
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ACS Photonics
·
2026
·Vol. 13
·期 17
·5272-5281
·
IF 6
Wang Ya,Wang Faxin,Ran Xi,Du Zaiming,Yin Mingyang,Zhang Hanyu,Zhang Xingchen,Liu Jing,Yao Haifeng,Cao Jie,Lan Xinzheng,Tang Xin,Hu Huicheng
Spectral-selective photodetection across the visible
to short-wave
infrared (VIS–SWIR) range is highly desirable for advanced
imaging and sensing applications. Here, we report a bias-switchable
colloidal quantum-dot (CQD) n – p – n photodetector based on vertically stacked
PbS and PbSe CQD heterojunctions with oppositely oriented built-in
electric fields. This architecture allows electric-field redistribution
under external bias, enabling controllable carrier transport and wavelength-dependent
response. A ZnTe interlayer is introduced to suppress dark current
and enhance bias-polarity-dependent spectral selectivity. By reversing
the bias polarity, the device electrically switches between VIS +
near-infrared (NIR) and NIR + SWIR detection modes within a single
pixel. The photodetector exhibits low dark current densities and high
detectivities of 4.3 × 10 11 , 2.6 × 10 11 , and 1.6 × 10 11 Jones at 600, 1000, and 1550 nm,
respectively. Integration with a silicon thin-film transistor readout
circuit enables multimodal VIS–NIR–SWIR imaging, and
multilayer perceptron–assisted learning further enables high-quality
spectral reconstruction. These results highlight the potential of
this CQD n – p – n architecture for multispectral imaging and compact computational
spectrometer applications.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Changsheng Zhang,Yuxuan Hu,Haijun Liu,Xinzhong Zhang,Fengjian Luo,Zhengyun Lou,Li Zhou,Shuang Liang,Mei Yang
The detection of hazardous contaminants such as heavy metal ions and pesticide residues in water is essential for safeguarding environmental safety and public health. In this study, boron and nitrogen co-doped carbon dots (B,N-CDs) were synthesized via a one-step hydrothermal method using sodium citrate, urea, and boric acid as precursors. The as-prepared B,N-CDs demonstrated good water solubility, uniform dispersion, a maximum fluorescence emission at 445 nm, and reasonable stability. A fluorescence sensing platform based on B,N-CDs was developed for the sequential detection of Fe 3+ and phoxim using an “on-off-on” mode. The fluorescence of B,N-CDs is efficiently quenched by Fe 3+ through a static quenching mechanism (SQE); subsequent addition of phoxim restores the fluorescence due to competitive binding of phoxim with Fe 3+ . The detection limits for Fe 3+ and phoxim are 3.46 μM and 0.5 mg/L, respectively. In spiked environmental water samples, satisfactory recoveries of 82.7%–95.2% for Fe 3+ and 97.5%–112.0% for phoxim were obtained, with relative standard deviations (RSDs) below 15% ( n = 5). This study presents a promising platform for monitoring Fe 3+ and phoxim in aqueous environments.
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Journal of Cleaner Production
·
2026
·
IF 10.7
Yang Yang,Yaohui Cai,Xiaodong Gao,Junhao Cao,Juan Yu,Peizhen Zhang,Qianyu Wang,Yuyang Zhou,Xining Zhao
Straw-derived CBE enables irrigation and heavy metal removal. • Optimized CBE shows high flux and sufficient mechanical strength. • CBE enables safe irrigation using heavy metal–contaminated water. Open burning of agricultural straw poses a serious threat to the sustainable development of agriculture. To address this challenge, this study developed an eco-friendly carbon-based emitter (CBE) using waste maize straw that integrates irrigation and heavy metal removal, providing a feasible pathway for straw resource utilization and the safe reuse of wastewater. The CBE was fabricated from discarded maize straw through a vacuum pyrolysis-molding-sintering process. The fabricated CBEs exhibited flexural strength ranging from 2.25 to 3.72 MPa, open porosity between 52.66% and 55.41%, and hydraulic flux from 42.09 to 206.78 L m −2 h −1 . The optimal formulation (straw: biochar: clay = 2:4:1) with a sintering temperature of 900 °C achieved the best hydraulic performance. The CBE features a hierarchical lotus-root-like porous structure and shows high removal efficiencies for heavy-metal-contaminated irrigation water, with removal rates of 99.99%, 94.87%, and 83.73% for Cu(II), Cd(II), and Pb(II), respectively. The removal mechanisms are mainly attributed to chemical adsorption by surface oxygen-containing functional groups (–OH, –COOH) combined with pore-size sieving effects. Under multi-ion coexistence conditions, the effluent quality still meets the agricultural irrigation standards. Overall, this study demonstrates a multifunctional strategy for converting waste maize straw into structured CBE which integrates low-pressure irrigation with in-process heavy metal interception. These findings provide practical implications for straw valorization, safe wastewater reuse, and sustainable agricultural production. Download: Download high-res image (441KB) Download: Download full-size image
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JOM
·
2026
·
IF 2.3
Jiang Zhonglin,Li Hao,Liang Qian,Hu Ling,Huang Yao,Chen Mengjun
Recovering spent lead paste (SLP) is vital for lead resource sustainability and pollution control. Slurry electrolysis enables simultaneous leaching and electrowinning, yet the influence of ligand chemistry on recovery efficiency remains unclear. This study investigates four acidic systems (chloride, acetate, fluorosilicic, and methanesulfonic) through thermodynamic calculations, species simulations, and experiments, and the results show that acidic media facilitate PbO 2 and PbO conversion to Pb 2+ , while PbSO 4 dissolution specifically requires Cl − complexation. A trade-off between recovery rate and current efficiency was observed. The chloride system achieved the highest recovery rate (92.99%) but lower current efficiency (72.07%) with spongy lead products. Conversely, methanesulfonic and fluorosilicic systems showed higher efficiencies but insufficient recovery rates. The key mechanism involves Cl − competitive adsorption at the anode inhibiting PbO 2 passivation; other systems suffered from passivation, increasing energy consumption. Considering thermodynamics, kinetics, and sustainability, the chloride system demonstrated optimal lead solubility, electrode stability, and recycling potential. This work provides a theoretical basis for selecting electrolyte systems for green and efficient lead recovery.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zhenzhen Xie,Wei Jia,Xingzhen Li,Lei Pan,Shihao Xu,Changlong Jiang
Cadmium ion (Cd 2+ ) pollution poses severe environmental and health risks due to its high toxicity, bioaccumulation potential, and persistence. Although traditional detection methods require bulky instruments and complex procedures, limiting the suitability for rapid on-site analysis. The paper introduces aptamer-based fluorescent probes and double-stranded fluorescent probe based on an aptamer and its complementary DNA (cDNA). The former is composed of aptamers and SYBR Green dyes. The detection range of Cd 2+ is 0–8 μM, and limit of detection (LOD) is 15 nM. The probe consists of a double-stranded structure formed by a 5′-FAM-labeled Cd 2+ aptamer and a 3′-BHQ1-modified cDNA. By combining this probe with a hydrogel matrix, a smartphone-based sensing platform is constructed, which enables highly sensitive and convenient detection of Cd 2+ . It indicated that the detection range of the probe for Cd 2+ is 0–50 μM, with the LOD of 27.6 nM. Molecular dynamics simulations (MD) disclosed the binding mechanism of the aptamer and Cd 2+ : the specific recognition by nucleobases such as G9, C12, and T17 in the Coulomb force-driven double-twisted folding conformation plays a crucial role. Further integrating the probe into the hydrogel matrix constructed the dsDNA@hydrogel platform successfully achieved real-time visual detection of Cd 2+ in environmental samples. It not only offers a highly sensitive and cost-effective new approach for heavy metal detection, but promotes the advancement of portable environmental monitoring technologies through the innovation of the aptamer-hydrogel system.
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OPTICS EXPRESS
·
2025
·Vol. 33
·期 12
·25069-25079
·
IF 3.3
Qiurui Zhang,Pei Xiang,Juqing Li,Jincheng Lei
Perovskite quantum dots (QDs) have attracted great attention due to their tunable bandgap and emission wavelength, which can be adjusted by simply modifying the halide composition. However, it is still a challenge to achieve precise control of the composition of perovskite QDs due to the rapid and uncontrollable reactions. Herein, a laser-driven anion exchange method is developed to achieve precise control on the composition of perovskite QDs and optical properties. By adjusting the laser power density, the emission wavelength of the films can be continuously tuned from 414 to 648 nm. Sandwich and heterojunction structures are successfully fabricated by controlling the position of the laser spot irradiation. Furthermore, this method can fabricate films with a smooth, dense particle surface morphology, which provides potential applications in fields such as full-color displays and solar cells. The long-term stability of perovskite QDs films is achieved by using encapsulation technology, with excellent optical stability even after 50 days of immersion in water.
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高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Qianyuan Li,Haijun Tao,Chuanxiang Zhang,Nuoyan Xu,Ling Ding,Yuqiao Wang
This study presents a synergistic passivation strategy employing poly(vinyl alcohol) (PVA) to concurrently mitigate surface and bulk iodine vacancy defects in perovskite photodetectors (PPDs). Through the dual incorporation of PVA in precursor solutions and post-treatment solutions, we establish a hierarchical protection mechanism: Oxygen-functional groups in PVA form stable coordination complexes with undercoordinated Pb2+ species, achieving a 32.3% reduction in defect density, while simultaneously creating moisture/oxygen-resistant barriers through grain boundary encapsulation. This dual-function approach effectively suppresses nonradiative recombination pathways, resulting in a 2-fold enhancement of carrier lifetimes. The optimized PPDs achieve a responsivity of 0.184 A/W and a detectivity of 2.55 × 1011 Jones. Remarkably, unencapsulated devices maintain 90% of initial performance following 360 h ambient exposure (T90 > 360 h). The universality of this strategy is validated across I/Br/Cl-based perovskite systems. Combined with solution-processability and room-temperature fabrication compatibility, this approach provides a scalable platform for industrial production of stable perovskite optoelectronics.
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Journal of Materials Chemistry C
·
2025
·
IF 5.1
Ya Wang,Min Chen,Manning Hu,Anxin Jiao,Faxin Wang,Xiaolong Zheng,Wanqing Li,Xin Tang,Huicheng Hu
Lead selenide (PbSe) colloidal quantum dots (CQDs) are promising candidates for short-wave infrared (SWIR) photodetectors due to their low-cost fabrication and solution processability. However, conventional ligand exchange strategies, such as treatment with 1,2-ethanedithiol (EDT), usually lead to incomplete defect passivation and undesirable doping characteristics. Here, we developed a hybrid-ligand strategy by combining EDT and zinc iodide (ZnI2) to simultaneously passivate surface defects and modulate the doping type of PbSe CQD films. As a result, the photodetector responsivity improves from 0.04 A W−1 to 0.40 A W−1, and the specific detectivity increases from 3.4 × 1010 Jones to 2.8 × 1011 Jones at 500 Hz under zero bias. The optimized device exhibits a wide linear dynamic range exceeding 114 dB and a fast response time of 7.3 μs. Finally, the infrared imaging applications of PbSe CQD photodetectors were successfully demonstrated. This work highlights the importance of synergistic surface passivation and doping modulation in enhancing the performance of CQD photodetectors.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jieqiong Wang,Boxin Yu,Fengshuo Wang,Zhe Wang,Ming Xu,Yanping Wu,Hongyuan Zhang
Heavy metal ions (HMIs) pollution has become a significant threat to the global environment and agricultural safety. The accumulation of these metals in soil and crops may have a serious impact on human health. Therefore, it is of utmost importance to develop a rapid, reliable and highly sensitive detection platform. A self-supporting electrochemical sensor based on an interpenetrating twin ZIF-8/carbon nanofiber aerogel (ZIF-8(IT)/CNT-NFCA) was developed for the sensitive and simultaneous detection of Cd 2+ and Pb 2+ in soil and crop samples. Unlike traditional electrodes, this independent architecture eliminated the need for rigid conductive substrates and complex surface modifications. The freestanding 3D nanofiber network, reinforced by carbon nanotubes and embedded with twin-structured ZIF-8, provided a mechanically stable and highly conductive matrix with abundant accessible active sites. Under optimized differential pulse anodic stripping voltammetry conditions, the sensor exhibited wide linear ranges of 0.10–100 μg·L −1 for both Cd 2+ and Pb 2+ , with low limit of detection (LOD) 0.09 μg·L −1 and 0.05 μg·L −1 , respectively. Benefiting from the integrated structure, the sensor showed enhanced signal stability and resistance to electrode delamination under real sample testing. Applications in actual rice, wheat, soil, and water samples demonstrated high recovery rates and validated the sensor's reliability. This study provides a robust and portable sensing platform, offering promising prospects for field-deployable heavy metal ion monitoring in environmental and agricultural safety.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xue-Hui Shi,Zhendong Zhu,Changlin Shen,Ya Li,Zhuang Qian,Yonghao Wu,Huifeng Chen,Qing-Qing Ye,Chaojie Hu,Yifan Song,Lei Wang,Zhimou Yang,Wenjie Ren
Fluorescent semiconductor quantum dots (QDs) had the potential to revolutionize biological imaging, but their applications were limited by the difficulties of obtaining biocompatible and high fluorescent-quality QDs due to the difficulty in manipulating surface properties. Here, we explored a facile and effective ligand exchange approach, which enabled sequential surface functionalization and phase transfer of QDs while maintaining QDs fluorescence intensity, size and morphology. Nitrosonium tetrafluoroborate (NOBF 4 ) was employed to substitute for the original organic ligands attached to the QDs surface, stabilizing the QDs in polar and hydrophilic media N , N -dimethylformamide for 60 days without aggregation or precipitation. This method was applicable to a wide range of QDs of different compositions, fluorescence emission wavelengths and sizes. The obtained hydrophilic QDs can subsequently be further functionalized with various capping molecules, which can endow the different surface functionalization of QDs according to the modified molecules employed. Among these, Ag 2 Te QDs after NOBF 4 treatment could undergo sequential surface functionalization, which achieved high-quality in vivo fluorescent imaging. This work offered a versatile ligand exchange strategy for QDs surface functionalization and was a significant step toward controllably engineering the QDs surface properties.
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OPTICAL MATERIALS
·
2025
·
IF 4.2
Qi Chen,Fang Lei,Ying Shi
Perovskite light-emitting diodes (PeLEDs) employing CsPbX 3 nanocrystals (NCs) face persistent challenges in balancing emission efficiency and spectral stability due to surface halide vacancies, which trigger nonradiative recombination, halide phase segregation, and self-doping effects. In this work, we address these limitations by introducing 3,5-dicarboxyphenylboronic acid (3,5-DA) as a multifunctional bidentate ligand additive. The unique coordination architecture of 3,5-DA, featuring multiple chelating groups, enables strong binding affinity to perovskite NC surfaces. This interaction effectively passivates halide vacancies while suppressing ion migration and defect formation. The optimized CsPb(Br/I) 3 NCs exhibit enhanced stability and suppressed nonradiative losses, enabling high-performance white LEDs (WLEDs). At a driving current of 10 mA, the fabricated WLEDs demonstrate a luminous efficiency of 10.32 lm·W −1 , a CIE coordinate of (0.3379, 0.3391), a correlated color temperature (CCT) of 5260 K, and an external quantum efficiency (EQE) of 6.48 %. This work provides a ligand engineering strategy to concurrently resolve efficiency-stability trade-offs in PeLEDs.
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