Chemistry-Switzerland
·
2026
·Vol. 8
·期 1
·11
·
IF 2.4
Aikun Liu,Xu Liu,Zixuan Huang,Yanqing Ge
Nitrite, as a widely present nitrogen oxide compound in nature, and is extensively distributed in production and daily life; precise and rapid detection of it is of great significance for ensuring human health. This study developed nitrogen-doped carbon dots (N-CDs) using malic acid and 3-diethylaminophenol as precursors by one-step hydrothermal treatment. The obtained N-CDs exhibited strong green fluorescence with a high quantum yield of 20.86%. More importantly, they served as a highly effective fluorescent probe for NO2−sensing, demonstrating a low detection limit of 28.33 μM and a wide linear response range of 400 to 1000 μM. The sensing mechanism was attributed to an electrostatic interaction-enhanced dynamic quenching process. Notably, the probe enabled dual-mode detection: a distinct color change from light pink to dark brown under daylight for visual semi-quantification, and quantitative fluorescence quenching. The N-CDs showed excellent selectivity over common interfering ions. Furthermore, their low cytotoxicity and good biocompatibility allowed for successful bioimaging of exogenous and endogenous NO2−fluctuations in live HeLa cells. This work presents a facile green strategy to synthesize multifunctional N-CDs that realized the sensitive, selective, and visual detection of NO2−in environmental and biological systems.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.6
Xiaolei Shi,Zhuannian Liu,Yifei Wang,Benlong Wei
The K-CP/MnO 2 composite was prepared by loading manganese dioxide (MnO 2 ) nanosheets onto potassium hydroxide (KOH) activated carbonized polyaniline (K-CP) via low-temperature hydrothermal reaction. The composite demonstrated high efficiency in removing Pb 2+ and Zn 2+ in the hybrid capacitive deionization (HCDI) technology. K-CP/MnO 2 presents a core-shell structure with conductive K-CP as the core and electrochemically active MnO 2 constructed by porous nanosheets as the shell. The disordered entanglement of K-CP and MnO 2 nanoflakes significantly increases the interlayer spacing, optimizes the pore distribution, creates favorable conditions for charge and ion transport, and realizes the synergistic effect of electric double layer (EDL) adsorption and Faradaic reactions. The specific capacitance (SC) of K-CP/MnO 2 at 5 mV s −1 is 112.03 F g −1 , which is nearly 3.76 times that of CP (29.82 F g −1 ). At a voltage of 1.2 V (100 mg L −1 ), the electrosorption capacity (SAC) of the K-CP/MnO 2 electrode for Pb 2+ and Zn 2+ is 124.66 and 96.86 mg g −1 , respectively. After 15 adsorption/desorption cycles in the HCDI device, the adsorption capacity for Pb 2+ and Zn 2+ is retained at 86.81% and 82.59%, respectively. The experiments indicate that the removal of Pb 2+ primarily occurs through electrosorption, redox reactions, and surface complexation, while Zn 2+ is inserted into the channel provided by MnO 2 and participates in the solid phase reaction. The K-CP/MnO 2 composite prepared in this study offers a novel approach for designing high-performance HCDI electrodes and achieving the selective removal of heavy metals.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2026
·
IF 15.7
Li Yukong,Wang Ziyi,He Xiaoyang,Sun Chen,Zheng Qikai,Jiang Yilin,Chen Zuofeng,Fei Honghan
Hybrid lead halides have demonstrated great promise for CO 2 photoreduction due to their excellent photophysical properties. However, developing a single-component hybrid lead halide that combines high intrinsic stability with near-infrared absorption remains a significant challenge. Herein, to address both issues, we design a series of nine highly stable lead halide frameworks functionalized by bis(terpyridine)-metal complexes, which exhibit strong light absorption extending into the near-infrared region up to 1150 nm. Unlike their symmetric chloride and bromide analogues, the charge-polarized lead iodide sites in bis(terpyridine)-metal-functionalized frameworks serve as highly efficient C–C coupling centers for C 2 production in near-infrared-driven CO 2 photoreduction, achieving notable C 2 production rates of up to 14.2 μ mol g -1 h -1 with electron selectivities as high as 86%. These performances match the state-of-the-art among all reported single-component, near-infrared-responsive photocatalysts. This work highlights the potential of coordination-driven assembly of highly stable lead halide frameworks for near-infrared-driven artificial photosynthesis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Hao Yao,Xinhua Ouyang
Quasi-2D perovskite materials hold great promise for efficient blue LEDs due to their unique multi-quantum-well structure. However, achieving high efficiency in blue quasi-2D perovskite LEDs (PeLEDs) remains challenging, largely because of uncontrolled phase distribution and defect-related non-radiative recombination. In this work, two isomeric forms of diammonium organic cations were designed and synthesized, 1,4-phenylenedimethan-aminium bibromide (m-PDMABr₂) and 1,3-phenylene-dimethanaminium bibromide (p-PDMABr₂), which introduces them as blended spacer cations together with phenethylammonium bromide (PEABr). These isomers not only suppress the formation of undesired small-n phases but also passivate defects in the perovskite film. By optimizing the blending ratio of m-PDMABr₂ to PEABr (3:7), we achieve improved phase distribution and lower defect density. As a result, the champion PeLED delivers a peak external quantum efficiency (EQE) of 13.68%. While devices using p-PDMABr₂ at the same ratio reach a maximum EQE of 12.26%. Compared to the control device based solely on PEABr (EQE = 7.11%), these represent remarkable improvements of 92.41% and 72.43%, respectively. Our study demonstrates that strategically designed isomeric spacer cations can effectively tune phase behavior and suppress defects, offering a practical materials-design strategy for high-performance blue quasi-2D PeLEDs.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Jing Wang,Fuge Chai,Mengya Fan,Yongping Dong
The present work focuses on developing a highly sensitive ECL sensor for Pb 2+ detection based on WS 2 quantum dots (QDs). A top-down sonication-assisted liquid-phase exfoliation method was employed to synthesize WS 2 QDs which were characterized by TEM, XPS, Raman spectroscopy and electrochemistry. It was found that WS 2 QDs could not only generate mild cathodic ECL itself but also significantly promote the cathodic ECL of lucigenin. The electrochemical results suggested that WS 2 QDs could effectively accelerate the reduction process of dissolved oxygen and lucigenin, thereby greatly amplifying the ECL intensity. The specific interaction between Pb 2+ and WS 2 QDs could significantly decrease ECL signal due to the depletion of WS 2 QDs, based on which an ECL sensor for detecting Pb 2+ was developed. Under the optimal condition, a good linear relationship between the inhibited ECL signal and the logarithm of Pb 2+ concentration was obtained in the range from 1 nM to 50 μM, with a low detection limit of 10.4 pM. Moreover, the fabricated sensor exhibited high sensitivity and excellent selectivity, and could be used for the sensitive detection of Pb 2+ in real samples.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Tianyu Luo,Sisi Liu,Aoshen Wei,Junlin Wang,He Li,Yong Xia,Xiaoyan Wen,Haifei Lu,Ming-Yu Li
Lead sulfide colloidal quantum dots (PbS CQDs) are potential optoelectronic semiconductor materials for short-wave infrared (SWIR) photodetectors owing to their tunable bandgap, high absorption coefficient, and monolithic integrability with silicon readout circuits. However, incomplete surface passivation of {100} facets in large-size PbS CQDs (diameter > 4 nm) and ubiquitous halide ions migration in CQDs films have resulted in high dark current in PbS CQDs SWIR photodetectors. Herein, a dual ligands passivation combined with in-situ oxidation strategy is proposed to improve the surface passivation of CQDs and suppress the ions migration process. The advanced dual ligands could effectively passivate the polar {111} and non-polar {100} facets to reduce trap states in CQDs films, while the subsequently controllable thermal process could restrict the ions migration by interrupting the transport pathway to improve stability. The resultant PbS CQD infrared photodetectors exhibit remarkably reduced dark current and maintain almost unchanged photoresponse. The optimized photodetector exhibits a responsivity of 22.88 mA/W and a specific detectivity of 1.14 × 10 11 Jones at 1300 nm under a 1 V bias, demonstrating an alternative approach toward high-performance SWIR photoelectronic devices.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 31
·42824-42836
·
IF 7.8
Zhao Quan,Huang Tao,Xu Ou,Fu Jiali,Huang Jiaren,Zhao Yongqiang,Wang Suihao,Liu Dongxi,Chen Weixing,Zou Bingsuo
Organic–inorganic hybrid multimetal halides possess rich photophysical properties and great potential for multicolor emission and multifunctional optoelectronic applications, but their development is limited by phase separation and the difficulty of integrating multiple luminescent functions. Herein, we report a zero-dimensional Pb-In bimetallic halide, (C 9 H 20 N) 7 [InCl 4 ] 2 [Pb 3 Cl 11 ] (C 9 H 20 N + = 1-butyl-1-methylpyrrolidinium), as a structurally well-defined multimetallic crystalline platform. Under 340 nm excitation, the compound exhibits bright green emission at 518 nm with a high PLQY of 96.4%, originating from the [Pb 3 Cl 11 ] 5– cluster tri-polaron formed through phonon-assisted coupling among three [PbCl 6 ] 4– octahedra. Upon Sb 3+ introduction, an additional broadband red emission at 675 nm appears, associated with Sb 3+ -related triplet self-trapped exciton (STE) and Sb 3+ -In 3+ donor–acceptor pair (DAP), enabling excitation-dependent tunable emission from green to red. More importantly, under 365 nm excitation, the undoped crystal shows pronounced anti-thermal-quenching behavior, while the Sb 3+ -doped system exhibits temperature-responsive luminescence regulation and reversible red-orange-green thermochromism over 80–460 K. This work thus integrates efficient cluster-based green emission, Sb 3+ -induced red emission, antithermal-quenching behavior, and reversible thermochromic response in a single Pb-In multimetallic zero-dimensional crystalline platform, showing promise for solid-state lighting, optical anticounterfeiting, and information encryption.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Qing Li,Juan Luo,Lichuan Zhen,Rui Dong,Huanhuan Zhai,Pengfei Tan,Jun Pan
Pb incorporation creates strained, dislocation-rich PtCu nanowires. • Oversized Pb atoms couple lattice strain with electronic modulation. • Pb-PtCu NWs deliver 0.932 V E 1/2 and 1.042 A mg Pt −1 MA. • Pb-PtCu NWs show only 10 mV E 1/2 loss after 10,000 cycles. • Strain-dislocation coupling enables durable acidic ORR catalysis. Strain and defect engineering offer powerful routes to improve Pt-based oxygen reduction reaction (ORR) electrocatalysts, but constructing stable high-energy defects under harsh electrochemical conditions remains challenging. Herein, we report a Pb-induced dislocation engineering strategy to develop highly strained PtCu nanowires (NWs) for efficient and durable ORR catalysis. Owing to the large atomic-size mismatch between Pb and the PtCu lattice, oversized Pb atoms disrupt lattice periodicity and generate abundant lattice distortion, dislocation defects, and heterogeneous strain fields within the nanowire framework. Structural and spectroscopic analyses reveal that Pb incorporation not only stabilizes the defect-rich strained structure but also modulates the electronic structure of Pt sites, downshifting the d-band center and weakening the adsorption of oxygen-containing intermediates. Consequently, the Pb-PtCu NWs deliver excellent ORR activity in acidic media, with a half-wave potential of 0.932 V and a mass activity of 1.042 A mg Pt −1 at 0.9 V, 9.1 times that of commercial Pt/C. Moreover, they exhibit outstanding durability, showing only a 10 mV half-wave potential loss after 10, 000 cycles. This work provides an effective design principle for creating defect-rich Pt-based catalysts through the introduction of oversized main-group metals. Oversized Pb atoms are incorporated into PtCu nanowires to induce strong lattice distortion, dislocation defects, and heterogeneous strain fields. The resulting strain-dislocation coupling stabilizes defect-rich PtCu nanowires and modulates the electronic structure of Pt sites, weakening oxygen-intermediate adsorption and enabling efficient and durable oxygen reduction in acidic media. Download: Download high-res image (172KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Afei Zhang,Salman Ali,Gomaa Mohamed Gomaa Khalaf,Long Chen,Xinzhao Zhao,Jianbing Zhang,Kun Xu,Hsien-Yi Hsu,Li Wang,Mingyu Li,Haisheng Song
Wide-spectrum responsive monolithic perovskite/PbS QD tandem solar cells • RPD-ITO ICL reduces transport barriers and avoids thermal damage to subcells • Monochromatic offset light diagnosis pinpoints subcell photocurrent mismatch • Substrate tandem architecture eliminates solvent-induced perovskite degradation • Substrate perovskite/PbS QD tandems achieves a record efficiency of 21.14%. Emerging tandem photovoltaics offer a promising route for cost-effective solar energy harvesting through high power conversion efficiency (PCE). Although perovskite/PbS quantum dot (QD) tandem solar cells (TSCs) enable broad-spectrum light harvesting, inefficient charge recombination within interconnection layer (ICL) and structural incompatibility cause serve efficiency losses. Herein, we developed monolithic n-i-p perovskite/PbS QD TSCs incorporating a simplified indium tin oxide (ITO)-based ICL. Compared with Au/atomic layer deposition (ALD)‑tin oxide (SnO 2 ) counterpart, the ITO-based ICL exhibits excellent processing compatibility, favorable band alignment, and reduced carrier transport barriers. Compared to the control device, the ITO-based perovskite/PbS QD tandem device demonstrated an improved efficiency from 17.34% to 20.65%, with the fill factor increasing from 65.30% to 72.73%. The corresponding four-terminal tandems also reached a PCE of 26.34%. Furthermore, to address the current mismatch in the superstrate configuration, we engineered a substrate architecture featuring a self-assembled monolayer-integrated ICL. Benefiting from improved current matching, the substrate TSCs achieved a record PCE of 21.14%, with the open-circuit voltage increasing from 1.616 V to 1.718 V. This research demonstrates that matching ICLs and tandem configurations is essential for advancing the performance horizons of solution-processed hybrid perovskite/PbS QD TSCs. Download: Download high-res image (298KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Zhousu Xu,Peng Wang,Minhao Fang,YuanHang Gao,Hong Jia,Beibei Xu,Xiaofeng Liu,Qifeng Qian,Jianrong Qiu
Encapsulation of metal halide perovskite quantum dots (QDs) inside an inorganic glass matrix offers an effective route to address the stability issue, while the tuning of the luminescence performance across the full series of CsPbX 3 (X = Cl, Br, I) QD in a single glass system remains challenging. Here, by tuning the fraction of the two-dimensional (2D) network structure in a borosilicate glass system, we demonstrate the growth of CsPbX 3 (X = Cl, Cl/Br, Br, Br/I, I) QDs with controllable optical properties. Results indicate that as the halide ion radius increases, the optimal B 2 O 3 concentration corresponding to the maximum fluorescence intensity gradually increases, with the proportion of 2D network structures in the glass rising accordingly. Furthermore, CsPbX 3 QD glass fibers were further fabricated via high-temperature melt-drawing process. By optimizing the heat treatment parameters and fiber length, the optimal light transmission performance was determined. Finally, a self-calibrated temperature sensor based on the fluorescence intensity ratio (FIR) technique was successfully developed by incorporating Sm 3+ ions. The sensor delivers exceptional sensitivity and stability, with a maximum relative sensitivity of 0.030 K −1 at 370 K. This study not only confirms the critical role of the glass network in glass design but also provides a feasible technical pathway for developing a new generation of stable and efficient perovskite optoelectronic devices.
✓ 已验证
产品关联
DOI
高影响因子
BIOMASS & BIOENERGY
·
2026
·
IF 7
Weilong Zhang,Lixuan Wang,Ruijie Zhang,Dongming Ye,Man Zhang,Fengjun Zhao,Guang Yang
1, Use forest fuels to make biochar, reducing wildfires and heavy metal pollution. • 2, Broadleaf biochar had superior Pb(II)/Cd(II) adsorption (81 and 39 mg/g). • 3, Electrochemical properties and specific surface area drive adsorption efficiency. Producing biochar from forest fuels represents a sustainable approach to mitigating wildfires, though its potential for addressing heavy metal contamination remains poorly understood. This study employed slow pyrolysis with restricted oxygen to produce biochar from the surface fuels of four typical tree species in North Asia ( Larix gmelinii , Pinus sylvestris var. mongolica , Quercus mongolica , and Fraxinus mandshurica ) at varying temperatures (300–700°C). Adsorption kinetics and isotherms for Cd(II), Cr(VI), Pb(II), and Zn(II) ions were systematically investigated. Characterization was performed using Fourier Transform Infrared Spectroscopy (FT-IR) and X-ray Photoelectron Spectroscopy (XPS). Machine learning (Random Forest RF) and Structural Equation Modeling (SEM) were innovatively applied for in-depth analysis. Results indicate that Broadleaf tree biochar ( Quercus mongolica , Fraxinus mandshurica ) demonstrates superior adsorption for Pb (II) and Cd (II) (81 mg/g and 39 mg/g, respectively), while conifer biochar shows enhanced adsorption for Cr (VI) (11.84 mg/g). Mechanistic analysis indicates that adsorption of these four metal ions primarily follows monolayer adsorption accompanied by chemical interactions, including: chelation by oxygen-containing functional groups, M-π electron interactions, and CO 3 2− precipitation. SHapley Additive exPlanations (SHAP) (based on models with R 2 > 0.94) and Partial Least Squares Structural Equation Modeling (PLS-SEM) revealed that Electrochemical Properties (Ep) and specific surface area (SSA) are key physicochemical properties influencing adsorption efficiency, directly affecting biochar's ability to adsorb heavy metal ions. Collectively, these findings demonstrate that biochar produced from forest surface fuels not only offers a strategic solution for wildfire management, but also effectively remediates heavy metal contamination, thereby contributing to sustainable ecosystem development. Download: Download high-res image (584KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2026
·
IF 9.9
Jiaxin Li,Mengxia Tang,Haopeng Wang,Minrui Huang,Xuenan Feng,Yao Wang,Junxia Yin,Peiyun Wei,Yanfeng Wang,Guandao Gao
Ultrasound-driven polytetrafluoroethylene contact-electro-catalysis reduces Cr(VI) to Cr(III). • PTFE contact-electro-catalysis enables generation of e − , •O 2 − , •OH and H 2 O 2 . • The PTFE contact-electro-catalytic system exhibits strong tolerance toward coexisting ions. • Contact-electro-catalysis decreases the biological toxicity of chromium. Efficient conversion of highly toxic hexavalent chromium (Cr(VI)) into low-toxicity trivalent chromium (Cr(III)) is of critical importance for mitigating environmental risks associated with chromium-containing wastewater. Here, we report an ultrasound-driven contact-electro-catalysis (CEC) process using commercial polytetrafluoroethylene (PTFE) as an efficient catalyst for Cr(VI) reduction. The PTFE CEC system achieved >99% Cr(VI) removal within 30 min under ambient conditions, and bioassays with Microcystis aeruginosa and wheat seedlings confirmed a marked decrease in ecotoxicity. Mechanistic studies revealed that PTFE continuously generated energetic electrons, superoxide radicals, and hydrogen peroxide during ultrasonication, which synergistically mediated the selective conversion of Cr(VI) to Cr(III). The system exhibited high tolerance to coexisting ions and maintained >90% removal efficiency in real water samples and > 95% activity after use in 27 cycles. Unlike conventional approaches, this strategy does not require sacrificial agents, engineered catalysts, or a controlled atmosphere. These findings demonstrate ultrasound-driven PTFE CEC is a green and efficient solution for treatment of Cr(VI)-contaminated wastewater. Download: Download high-res image (87KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）