Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 29
·23560-23569
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IF 9.5
Pubao Peng,Yaru Gong,Wei Dou,Jiajun Nan,Yanan Li,Song Li,Yang Geng,Congmin Liang,Jiaqi Fan,Di Li,Dewei Zhang,Pan Ying,Yang Cao,Guodong Tang
SnSe demonstrates unparalleled potential in thermoelectric applications, combining non-toxicity, low cost, and abundant sources. Furthermore, polycrystals have good machinability and are easier to prepare. Here, we report a high peak ZT of 2.0 at 873 K in Pb and Er co-doped polycrystalline SnSe prepared through the hydrothermal method. An ultralow lattice thermal conductivity of 0.13 W m−1 K−1 at 873 K is obtained by introducing endogenous hetero-/homo-structural nanoprecipitates and Sn vacancies into the matrix to construct a multiscale scattering structure for phonons. Meanwhile, with the band alignment and flattening induced by Pb and Er co-doping, the effective mass is increased thus leading to a large Seebeck coefficient. Pb and Er co-doping not only optimizes the energy band structure of SnSe, but also optimizes the carrier concentration, thus simultaneously leading to enhanced electrical conductivity as well as enhanced electrical transport properties. Therefore, a high peak ZT of 2.0 is achieved in Pb and Er co-doped polycrystalline SnSe due to the markedly ultralow thermal conductivity and enhanced power factor. This work proposes a novel approach to synergistically regulate the electrical and thermal transport properties of polycrystalline SnSe-based thermoelectric materials through constructing endogenous hetero-/homo-nanostructures combined with band alignment.
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RSC Advances
·
2022
·Vol. 12
·期 11
·6821-6830
·
IF 4.036
Jinling Gao,Mingzhe Song,Tongtong Li,Yuyao Zhao,Anxu Wang
Nanocomposites play a key role in the removal of toxic metal(loid)s from environmental water. In this study, we investigated the adsorption capability of water-soluble carboxymethyl chitosan (WSCC)-modified functionally oxidized single walled carbon nanotubes (oSWCNTs) for rapid and efficient removal of toxic Pb(II) from water. The WSCC–oSWCNTs nanocomposite was prepared by an acid treatment of SWCNTs followed by an ultrasonic dispersion process using WSCC as dispersant. The morphology and chemical characteristics of the WSCC–oSWCNTs nanocomposite were further identified using various characterization techniques (i.e., transmission electron microscopy, TEM; scanning electron microscopy, SEM; Raman spectra; Fourier transform infrared spectroscopy, FTIR; X-ray photoelectron spectroscopy, XPS; nitrogen adsorption–desorption isotherm test). The efficiency of the adsorption process in batch experiments was investigated via determining various factor effects (i.e. WSCC–oSWCNTs nanocomposite concentration, solution pH, initial Pb(II) concentration, contact time, and reaction temperature). Kinetic results showed that the adsorption process followed a pseudo-second-order, while an isotherm results study showed that the adsorption process followed the Langmuir and Freundlich isotherm models at the same time. In addition, the van't Hoff equation was used to calculate thermodynamic parameters for assessing the endothermic properties and spontaneity of the adsorption process. The WSCC–oSWCNTs nanocomposite manifested a high adsorption capacity for Pb(II) (113.63 mg g−1) via electrostatic interactions and ion-exchange, as its adsorption rate could reach up to 98.72%. This study, therefore, provides a novel adsorbent for the removal and detection of harmful residues (i.e. toxic metal(loid)s) from environmental water, such as industry wastewater treatment and chemical waste management.
研究领域:
环境科学
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纳米技术
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水处理
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环境化学
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材料科学
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Wenqiang Wang,Guanghui Zhang,Lihua Dong,Ping Gu
Heavy metals frequently coexist with organic ligands in water as heavy metal complexes, which are difficult to remove routinely. In this study, a novel EDTA-based covalent organic framework (COF-EDTA) was synthesized at room temperature through the incorporation of EDTA into a hydroxyl-functionalized COF (COF-OH) for enhanced removal of both free Pb(II) and Pb(II)-citrate complexes. Structural and compositional properties of the materials were analyzed via PXRD, FTIR, and 13 C NMR, while surface morphology, elemental distribution, specific surface area, and thermal stability were examined by TEM, SEM-EDS, BET, and TGA, respectively. Pb(II) adsorption experiments were subsequently performed to assess removal efficiency. In the single Pb(II) system, EDTA modification significantly improved the adsorption performance, with the equilibrium adsorption amount increasing from 38.51 mg/g (COF-OH) to 135.6 mg/g (COF-EDTA), an increase of approximately 252%. COF-OH adsorbed Pb(II) via coordinate and hydrogen bonding, while the significant adsorption of Pb(II) by COF-EDTA was attributed to chelation and ion exchange. In the Pb(II)-citrate binary system, COF-EDTA preferentially adsorbed free Pb 2+ at a citrate-to-Pb(II) molar ratio of 0.5:1. When Pb-Citrate − is the dominant species (> 93%), COF-EDTA enhanced removal of Pb(II) through ligand displacement (primary pathway, ~75% efficiency) coupled with intact adsorption of Pb-Citrate − complexes (secondary pathway, ~25%). The DFT calculation validated the feasibility of ligand displacement mediated Pb(II) capture by COF-EDTA, while COF-OH lacked this capability. This work provides critical guidelines for exploring novel adsorbents to enhance the removal of heavy metal complexes.
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WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 84
·期 12
·3726-3737
·
IF 1.915
Wang Penghui,Liu Wenli,Xu Hongxiang,Liu Guowei
An acid modified approach to enhance the adsorption capacity of low-rank coal (lignite) is proposed to reduce the risk of heavy metal ions within the wastewater. Adsorption kinetics, adsorption thermodynamics, adsorption coefficient and density functional theory DFT calculations were studied in this paper, respectively. The results indicate that the adsorption capacity of lignite was enlarged after HNO 3 modification, and pseudo-second order kinetics model and Langmuir isothermal adsorption model can be used to describe the adsorption process. The surface chemical properties of lignite play a dominant role rather than the specific surface area and total pore volume in the Pb(II) cation adsorption process, and it is suggested that the adsorption of Pb(II) cation by raw lignite (RL) and modified lignite (ML) is mainly completed by chemical adsorption. The Fourier transform infrared spectroscopy (FTIR) characterization showed that the surface oxygen functional groups of lignite increased after modification. The results of interaction energies between the model molecule and Pb(II) cation show that Pb(II) cation and -C-O-C are most easily combined, followed by -COOH, and -C = O is the weakest. The adsorption mechanisms of raw and modified lignite and Pb(II) cation were summarized. The original hemidirected structure of Pb(II) cation is broken, and a polar covalent bond is formed. A large number of flocculent precipitates were generated rapidly with the chelating reaction between humic acid molecules and Pb(II) cation. The adsorption of Pb(II) cation by lignite was a chemical adsorption process.
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Environmental Technology & Innovation
·
2026
·
IF 7.3
Yufei Gao,Zhao Gao,Qiqi Zheng,Jinjie Lv,Chuang He,Wenjie Zhang,Lei Xu,Haijie He
Cement-based solidification/stabilization (S/S) is an effective technique for remediating heavy metal-contaminated soils, yet its practical application in farmland is constrained by the high cement dosage commonly required and the limited chemical stabilization capacity of conventional systems. In this study, highly dispersible graphene quantum dots (GQDs) are introduced as multifunctional additives to enhance the S/S performance of ordinary Portland cement toward Pb- and Cd-contaminated soils at a cement dosage of 15 wt%. The incorporation of GQDs markedly improves heavy metal immobilization, and the optimum dosage of 0.4 wt% reduces the leaching concentrations of Pb and Cd by 81.7% and 84.4%, respectively, compared with the control sample. Meanwhile, Tessier fractionation shows that GQDs promote the transformation of both metals from labile fractions to more stable forms, with the residual fractions of Pb and Cd increasing from 37.53% to 42.74% and from 49.87% to 56.39%, respectively. Multi-scale characterization further reveals the underlying enhancement mechanism. XRD, FTIR, TG/DTG, and SEM analyses demonstrate that GQDs accelerate cement hydration, promote the formation of C–S–H gel, and refine the microstructure, thereby generating a denser solidified matrix that strengthens physical encapsulation. In parallel, aqueous removal experiments provide supporting evidence for the direct interaction between GQDs and heavy metal ions, while molecular dynamics simulations further reveal GQD-metal interfacial interactions at the atomic scale. These results demonstrate that GQDs enhance heavy metal immobilization through the synergistic effects of hydration promotion and surface chemical interaction, offering an effective strategy for developing high-efficiency low-cement S/S systems for contaminated farmland soil remediation.
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NEUROTOXICOLOGY
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2026
·
IF 3.8
Yongke Yuan,Mengchen Liu,Mengdi Zhai,Meijia Wu,Wenhui Zhang,Yongjuan Xin,Yue Ba,Yu Zhang,Lin Han,Lihua Gao,Hui Huang
Environmental lead (Pb) exposure and high-fat diet (HFD) intake are known to trigger massive neuronal apoptosis that contributes to neurologic dysfunction. Previous studies mainly focused on isolated mitochondrial dysfunction, autophagy-lysosomal pathway damage, and neuronal apoptosis from Pb or HFD. Nevertheless, the precise role of the lysosomal and proteasomal clearance processes in promoting neuronal cell death induced by Pb and HFD remains unclear. In this study, male Sprague-Dawley (SD) rats were employed to elucidate the mechanisms underlying Pb-induced neurotoxic mitochondrial apoptosis and to investigate the effects of co-exposure to HFD. In vitro , PC12 cells were treated with Pb and palmitic acid (PA) to mimic the in vivo conditions. Specifically, such exposures prompted the translocation of cathepsin B (CTSB) from lysosomes to the cytosol and downregulation of lysosomal-associated membrane protein 1 (LAMP1), ATPase H⁺ Transporting V1 Subunit A (ATP6V1A), and Bcl-2 within rat cortex. In contrast, the levels of pro-apoptotic factors including BID, Bax, mitochondrial cytochrome C (Cyt C), and caspase 3 were significantly elevated. We also observed a significant decrease in the fluorescence intensity of lysosomes while lysosomal pH was ascertained to have ascended appreciably. Concurrently, CTSB inhibition by CA-074 me prevented neural apoptosis processing triggered by Pb and/or PA via mitigating lysosomal damage and mitochondrial Cyt C translocation, indicating that CTSB is a key mediator in the apoptotic process induced by Pb and HFD.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Xin Li,Qiao-Hui Zhong,Jia-Kai Guo,Mei-Ju Li,Gao-Bin Chu,Jie Li
N235 extraction resin enables efficient Pb separation from geological reference materials. • Matrix are removed with dilute HBr and water, followed by Pb separation using low-concentration HBr. • The purified Pb is ready for MC-ICP-MS analysis without any evaporation step. • The method reliability is validated using various reference materials. • Pb isotope ratios of JA-1a are reported for the first time. Lead isotopic variations provide crucial insights into geochemical reservoirs, environmental sources, and geological ages. To obtain precise Pb isotope data by MC-ICP-MS, we develop a simple and efficient separation procedure using trialkyl amine (N235) resin. Batch experiments show that N235 strongly adsorbs Pb in 0.4 mol L −1 HBr, weakly in HCl, and not at all in HNO 3 media. Specifically, the optimized column procedure achieved high Pb recovery (94.5%) and eluted Pb in 0.5 mol L −1 HNO 3 , allowing direct measurement without evaporation, thereby reducing procedural blanks. The method was validated with ten reference materials (GSR-1, GSR-2, GSR-3, GSR-7, GSP-2, BHVO-2, JA-2, JG-2, JB-2, and JA-1a). Measured 206 Pb/ 204 Pb, 207 Pb/ 204 Pb and 208 Pb/ 204 Pb ratios agreed with published values within uncertainty, with external reproducibility better than 0.05% (RSD). Owing to its simplicity, high recovery, low blank, and low cost, this method offers a practical pretreatment strategy for high-precision Pb isotope analysis in diverse geological samples. A very simple, low-blank, and effective Pb purification method with a self-made trialkyl amine extraction resin is developed to separate Pb from geological reference materials for high precision determination of Pb isotopic compositions by MC-ICP-MS. Download: Download high-res image (254KB) Download: Download full-size image
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ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 35
·15530-15540
·
IF 7.6
Liu Jinpeng,Deng Runze,Mai Songlang,Zou Yuanhua,Marwat Mohsin Ali,Wang Junya,Tran Nguyen-Minh-An,Zhu Hanfei,Zhang Haibo,Tan Hua
Dielectric thin film capacitors are characterized by high energy density, rapid charge-discharge, high usable efficiency, and high breakdown field strength, and are widely used in electronics and novel energy technologies. To address the trade-off among polarization, efficiency, and breakdown strength in traditional single-layer dielectric capacitors, this study employs a low-cost sol-gel method to synthesize a BTO/PLCT/BTO sandwich structure film. By optimizing the annealing process, an amorphous/ferroelectric/amorphous multilayer phase structure coexistence was achieved. With increasing annealing temperature, the polarized nanoregions within the amorphous BTO layer expand, while the PLCT layer crystallizes into a ferroelectric phase. At 600 ° C, the synergistic amorphous/ferroelectric/amorphous phase effect is optimized, yielding an energy storage density of 80 J/cm 3 and an efficiency of 86% under an electric field of 5.4 MV/cm. Meanwhile, from room temperature to 150 ° C, the film achieves excellent dielectric and energy storage stability over a wide temperature range (variation rates of dielectric property and energy storage performance below 5%). After 10 9 fatigue cycles, the film still maintains the stability of its electrical performance (variation rate of Δ W rec /Δ W rec-initial ≤ 4%). This amorphous/ferroelectric/amorphous composite film overcomes the trade-off among polarization, usable efficiency, and breakdown strength inherent in single-phase materials, providing a viable strategy for fabricating high-stability energy storage films.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yanxia Li,Fangqing Yu,Wen Li,Liping Liu
Laser-induced 3D porous graphene enables scalable, low-cost biosensing. • PB/PEDOT/Au composite synergistically enhances stability, antifouling, and electroactivity. • The immunosensor achieves ultrasensitive detection of H1N1 and a wide dynamic range. • Label-free and pretreatment-free detection is successfully demonstrated in complex biological matrices. As a major cause of seasonal influenza, H1N1 virus requires advanced monitoring. Custom-patterned conductive graphene microelectrodes are essential for building relevant sensing platforms. In this study, a label-free H1N1 electrochemical immunosensor was developed based on a sequentially engineered laser-induced graphene (LIG)/Prussian blue (PB)/poly3,4-ethylenedioxythiophene (PEDOT)/Au nanocomposite microelectrode. Unlike previous studies that focused on single-component modifications, our approach integrates multiple functional layers to synergistically enhance signal stability, sensitivity, and antifouling performance. The LIG microelectrode was fabricated using a low-cost intelligent semiconductor laser, which directly patterned a three-electrode system on a polyimide (PI) film. Subsequently, PB, PEDOT, and gold nanoparticles (Au NPs) were sequentially electrodeposited onto the LIG electrode. PB served as an ultrasensitive electrochemical signal reporter, while the encapsulating PEDOT polymer layer not only stabilized the electrical signal of PB in neutral environments but also significantly enhanced the electrode's antifouling properties. To construct the label-free immunosensor, Au NPs were introduced to improve conductivity and were functionalized via Au–S–COOH bonding for the immobilization of H1N1 antibodies. Under optimal conditions, the LIG/PB/PEDOT/Au composite electrode exhibited excellent electrochemical activity and conductivity. The fabricated immunosensor demonstrated ultrahigh sensitivity with a wide concentration range from 0.1 fg mL −1 to 100 ng mL −1 , and an extremely low detection limit of 0.063 fg mL −1 . The results confirmed that the immunosensor possesses excellent selectivity, precision, and stability, and is thus suitable for the analysis of complex biological samples without the need for labeled probes and sample pretreatment. Therefore, this environmentally friendly and label-free immunosensing platform represents a significant advancement in point-of-care biosensing and demonstrates strong potential for rapid on-site screening and prevention of infectious disease outbreaks. A label-free immunosensor based on laser-induced graphene microelectrode modified with PB/PEDOT/Au nanocomposite enables ultra-sensitive detection of H1N1 virus in complex biological samples without pretreatment. Download: Download high-res image (120KB) Download: Download full-size image
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ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2026
·Vol. 48
·期 6
·250
·
IF 4.3
Ma Chuang,Liu XueMei
Lead (Pb) and cadmium (Cd) in soil threaten agroecosystem safety and human health. Due to the high bioavailability and mobility of heavy metals in red soil, the risk is further increased. Biochar is widely used for heavy metal immobilization, but original biochar suffers from inherent limitations. Most existing studies of iron (Fe)–manganese (Mn) modified biochar have not focused on red soil, and the relationship with soil–plant responses remains unclear. This study aimed to evaluate and compare the efficacy of sugarcane bagasse biochar (BC) and Fe–Mn modified sugarcane bagasse biochar (FMBC) for Pb and Cd immobilization in red soil, and clarify their effect on plant uptake. BC and FMBC were applied to Pb and Cd contaminated red soil for pot experiments with pak choi ( Brassica rapa chinensis ) as an indicator plant. The results showed that both BC and FMBC elevated soil pH, organic matter (SOM), enzyme activities, reduced Pb and Cd bioavailability, and transformed Pb and Cd to stable fractions. FMBC outperformed BC, and the 5% FMBC treatment achieved the optimal remediation efficacy. The 5% FMBC decreased the acid-extractable Pb and Cd by 9.33 and 34.40% compared to control. The plant biomass was significantly increased, Pb and Cd content in edible shoots met the limit standards, and bioconcentration (BCF) and translocation factors (TF) were lowered. Overall, this study establishes theoretical foundations and empirical bases for the application of FMBC to immobilize Pb and Cd in red soils, thereby providing a feasible and eco-friendly approach to support sustainable agriculture and the recycling of agricultural waste.
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高影响因子
ELECTROANALYSIS
·
2026
·Vol. 38
·期 5
·e70169
·
IF 2.6
Jiewen Tian,Xingliang Hu,Weiye Zhang,Yao Li,Jiameng Yang,Xiujun Deng,Jieqiong Hu,Hongxing He
Given the serious health risks posed by Pb(II) contamination in natural waters, significant efforts have focused on developing electrochemical sensors for its detection, centering on the design of sensitive, stable, and low-cost electrode materials. In this work, a lead ion-imprinted polymer (MWCNTs@SiO 2 @IIP) was synthesized via a surface ion-imprinting technique, employing vinyl trimethoxysilane-modified multiwalled carbon nanotubes (MWCNTs) as the substrate. A comprehensive characterization of MWCNTs@SiO 2 @IIP was carried out by means of a variety of advanced characterization technologies. An electrochemical sensor, designated as MWCNTs@SiO 2 @IIP/CPE, was fabricated by incorporating the polymer into a carbon paste electrode. Key parameters affecting the inspection of Pb 2+ , including the amount of imprinted polymer, electrolyte pH, deposition potential, and deposition time, were systematically investigated. The sensor exhibited a second-order linear response across two concentration ranges: 2–30 μg·L −1 and 30–240 μg·L −1 , with a calculated detection limit of 0.61 μg·L −1 . Furthermore, the imprinted sensor demonstrated high repeatability, excellent stability, and remarkable selectivity. The constructed electrochemical sensor thus presents an advanced strategy for the expedient and selective detection of lead ions in aqueous conditions.
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ADVANCED MATERIALS
·
2026
·
IF 29.1
Leping Li,Chenhao Xu,Lei Zheng,Jixia Tang,Wenjing Jiang,Zongbo Feng,Baozeng Zhou,Jinlian Bi,Yongxu Hu,Wei Li,Yujie Yuan,Wenping Hu
The visual-inertial odometry (VIO) system enables continuous and accurate tracking of high-speed moving objects, offering distinct advantages for unmanned vehicles and mobile robots, but spatiotemporal inconsistency between components data often degrades overall performance. Here, we demonstrate a visual inertia-inspired multimode sensor (VIMS) based on FAPbI 3 (FA/PbI 2 = 4:1) organic–inorganic hybrid perovskite quantum dots (OIHPQDs) sensitized MoS 2 heterostructure, featuring reconfigurable photodetector (PD) and photosynaptic (PS) functions, successfully demonstrating single-device functional integration for VIO. The heterostructure exhibits light-power-selective, Pb–S coupled-mediated charge transport, enabling distinct light response speeds for PD and PS mode switching while overcoming the need for lattice matching in heterostructure coupling. Moreover, uniform-sized FAPbI 3 is obtained using a self-designed microfluidic technique, ensuring excellent reproducibility in the fabricated heterointerface. The developed devices exhibit a high specific detectivity ( D * ) gain of ≈ 1000 under 0.039 mW/cm 2 dim light, excellent synaptic plasticity with 90% recognition accuracy and 40% noise tolerance, and optical secure communication capability with response times over 10 times faster than in PS mode. More importantly, the dual-mode VIMS array enables real-time tracking of dynamic grayscale and static attitude information from high-speed Newton's cradle and billiards, demonstrating dynamic/static information fusion for positioning and monitoring.
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高影响因子
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