JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 14
·142505
·
IF 3.721
Wei Han,Wenjuan Wang,Mei Li,Yangyang Meng,Wenjing Ji,Yang Sun
To recover Gd from LiCl-KCl eutectic, the coreduction mechanism of Gd(III) with Pb(II) was investigated using electrochemical methods. The formation potentials related to the formation of three Gd-Pb intermetallics were detected by cyclic voltammetry, square wave voltammetry and chronopotentiometry, and the formation mechanism of Gd-Pb compounds could be described as xPb(II) + 2xe− = xPb. Meanwhile, the electroreduction of Gd on liquid Pb electrode was explored. The diffusion coefficient of Gd metal in liquid metallic Pb was determined by anodic chronopotentiometry. The kinetic parameters of Gd(III)/Gd(in Pb) couple in the temperature range from 723 K to 873 K were determined employing linear polarization (LP) method. Based on the relationship of exchange current density and temperature, the reaction activation energy was estimated to be 23.17 kJ mol−1. In addition, the recovery of Gd from molten salts was performed assisted by liquid Pb electrode by constant potential electrolysis (CPE) and constant current electrolysis (CCE). The products characterized using XRD, SEM with EDS are comprised of GdPb3 and Pb phases. The concentration change of Gd during CCE process was monitored by ICP-AES, and the recovery rate was estimated. The results showed that Gd concentration decreased and recovery rate increased with the duration.
研究领域:
材料科学
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电化学工程
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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Jianming Tao,Zicong Hu,Qian Ma,Caiqiong Zhou,Lin Lei,Guohua Zhao
The widespread environmental heavy metal , Pb, is renowned for inducing irreversible damage to human health. Lignin, an original fiber, emerges as a promising natural candidate for mitigating lead toxicity owing to its exceptional adsorption capacity and biocompatibility. In this study, we conducted an investigation into the potential therapeutic effects of lignin derived from the bamboo ( Dendrocalamus Latiforus ) shoot shell (BSS-AAL) in alleviating Pb-induced oxidative stress and hypercholesterolemia in hamsters. Our findings demonstrated the remarkable ability of BSS-AAL to reduce Pb accumulation by 27–40% in plasma and 13–84% in tissues. Furthermore, BSS-AAL exerted reparative effects on the antioxidant system, evidenced by substantial reductions in plasma total cholesterol levels by at least 35% and hepatic cholesterol levels by an impressive 66%. Intervention with BSS-AAL also led to favorable alterations in the richness of key microbial genera, including norank_f__Erysipelotrichaceae , unclassified_f__Atopobiaceae , and norank_f__Eubacteriaceae , which are associated with modulating malonaldehyde accumulation, hepatic cholesterol 3-hydroxy-3-methylglutaryl coenzyme A reductase activity, as well as short chain fatty acids synthesis. These findings substantiated BSS-AAL played a vital role in effectively modulating Pb-induced oxidative stress and hypercholesterolemia by reducing Pb accumulation and favorably influencing gut microbiota.
研究领域:
环境科学
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营养学
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微生物学
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毒理学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 4
·798
·
IF 4.6
Lirong Ma,Zhuangzhuang Wang,Xiong Liu,Feng Xu,Tursun Abdiryim
Heavy metal ions impair human health and irreversibly damage the ecosystem. As a result, it is critical to create an efficient approach for identifying heavy metal ions. The electrochemical sensor method is a type of detection method that is highly sensitive, low in cost, and allows for real-time monitoring. In this study, solid carbon spheres were made using resorcinol and formaldehyde as raw materials, followed by the formation of PEDOT/carbon sphere composites via in situ oxidative polymerization, and Pb2+was detected utilizing them as electrode modification materials. The structure of the PEDOT/carbon spherical composites was analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). To investigate the electrochemical properties of these composites, electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV) were employed. In addition, the detection mechanism of the material for Pb2⁺ was studied using CV. The PEDOT/carbon sphere sensor showcased an extensive linear detection range of 7.5 × 10−2to 1.0 μM for Pb2+ions, achieving a low limit of detection (LOD) of 3.5 × 10−2nM and displaying exceptional selectivity. These results can be attributed to its large surface area, superior electrical conductivity, and outstanding electron transport properties. This study offers an effective material for detecting low concentrations of Pb2+, with potential applications in future Pb2+detection.
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Shutao Li,Pengyi Ma,Jinping Song,Xiaoting Guo,Jianhua Xue,Qi Ma
It is the first time to report the synthesis of small-molecule passivated boron quantum dots (BQDs) through a bottom-up strategy using L-cysteine (L-Cys) as a passivation agent and ammonium pentaborate tetrahydrate and boric acid as boron sources under a low reaction temperature of 100 °C. The morphology and surface structure of the prepared BQDs were characterized in detail using high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction. The as-obtained BQDs emitted blue fluorescence with a quantum yield of 1.14%, and the particle sizes are mainly distributed between 1.5 nm and 3.5 nm. Stability research results demonstrated that BQDs possess high stability performance. The findings revealed that BQDs could be used as a fluorescence nanoprobe for developing a fluorescence “turn-off/turn-on” sensing platform to detect the drug molecule sulfasalazine (SSZ) and Pb2+. The proposed sensor indicates high sensitivity and selectivity towards SSZ, and the linear response range is 1–100 μmol L−1 with a detection limit of 0.9 μmol L−1. The quenched fluorescence could be recovered by Pb2+ in the range of 40–180 μmol L−1 with a detection limit of 39.7 μmol L−1. The proposed “turn off-turn on” sensor gives satisfactory results for practical sample analysis. Meanwhile, the thermodynamic data were estimated, and the corresponding quenching mechanisms were also discussed in detail. Moreover, BQDs had low cytotoxicity, which presented a potential application in cell imaging. They can also be used in the construction of LED and fluorescent film.
研究领域:
材料科学
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分析化学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Hongrui Jia,Jiahao Mi,Zhen Li,Linghang Wang
Sm-doped Pb(Mg 1/3 Nb 2/3 )-PbTiO 3 (PMN-PT) binary ferroelectric ceramics has received extensive attention due to the excellent dielectric and piezoelectric properties . However, its Curie temperature ( T c ) is greatly reduced by Sm doping and T c is only 89 °C at the optimum piezoelectric coefficient. In this work, Sm-doped Pb(Mg 1/3 Nb 2/3 )O 3 –Pb(Zn 1/3 Nb 2/3 )-PbTiO 3 (Sm: PMN-PZN-PT) ternary ferroelectric ceramics near MPB were successfully manufactured and the crystal structure, microstructure and electric properties were investigated with respect to Sm doping content. A high piezoelectric coefficient of 870 pC/N and a high T c of 146 °C were achieved simultaneously in PMN-PZN-PT ternary ceramics with 1% Sm doping content. In addition, the room temperature dielectric constant was greatly improved by Sm doping and the P r , P s and E c values gradually decrease with the increase of Sm content. These results indicate that Sm-doped PMN-PZN-PT ceramics may be an attractive material for high performance piezoelectric device applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Frontiers in Nutrition
·
2022
·
IF 6.59
Zhenhui Chen,Ziyu Tang,Jingjing Kong,Lixuan Chen,Jiaxin Liu,Yunting Li,Wanwen Huang,Wendan Li,Junlin Wu,Wei Zhao,Xiaojing Meng,Hongying Fan
Pb poisoning affects infant growth and development. However, dimercaptosuccinic acid (DMSA) as the current therapy for Pb poisoning exerts relatively significant toxic side effects in infants. Therefore, identifying a non-toxic treatment in this regard is particularly important. In this study, we aimed to investigate the therapeutic effect of an infant feces-derived probiotic strain, Lactobacillus casei SYF-08 (SYF-08), on Pb poisoning in young mice. The Pb levels in the organisms were detected via inductively coupled plasma mass spectrometry, while the therapeutic effect of SYF-08 on Pb-induced neural system damage was explored via the Morris water maze test, hematoxylin-eosin staining, and immunohistochemistry. Additionally, the molecular mechanisms underlying the protective effects of SYF-08 against Pb-induced intestinal damage were also explored via histological staining, 16S rRNA sequencing, untargeted metabolomics, qRT-PCR, and western blotting. In vivo experiments revealed that SYF-08 reduced blood and bone Pb levels and increased urinary Pb excretion. Additionally, SYF-08 alleviated Pb-induced pathological damage to the brain and ultimately improved the learning and cognitive abilities of the young mice. This treatment also restored intestinal microflora dysbiosis, regulated bile acid metabolism, and inhibited the FXR-NLRP3 signaling pathway. It also resulted in fewer adverse events than the DMSA treatment. In conclusion, our results provided valuable insights into the therapeutic role of SYF-08 in Pb poisoning and also suggested that its administration can significantly alleviate the Pb-induced damage.
研究领域:
微生物学
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毒理学
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神经科学
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代谢组学
✓ 已验证
DOI
PubMed
高影响因子
CHINESE CHEMICAL LETTERS
·
2025
·
IF 8.9
Haoran Yu,Liang Cao,Jiajia Wang,Jian Guo,Ji Zhang,Shan-Tao Zhang
Piezoelectric materials have wide commercial applications involving our everyday lives. The common categorized “soft” and “hard” piezoelectric materials have distinct even contradictory performance parameters typically exemplified by piezoelectric coefficient d 33 and mechanical quality factor Q m . However, for some special devices operated in resonant mode, simultaneously high or at least balanced performance parameters are needed. Here, we show the transition from “soft” to “hard” performance in 2 mol% Sm doped (0.36- x )Pb(Ni 1/3 Nb 2/3 )O 3 - x Pb(Mn 1/3 Nb 2/3 )O 3 -0.28PbZrO 3 -0.36PbTiO 3 quaternary solid solution piezoceramics, for which the d 33 and planar electromechanical coupling factor k p decrease, while Q m and Curie temperature T c increase monotonously with increasing x value. As the results, balanced performance with moderate d 33 = 446 pC/N, k p = 0.49, Q m = 425, and T c = 170 °C are achieved around x = 0.03. This work not only shows the feasibility for combining “soft” and “hard” performance by forming appropriate solid solutions, but also provides a suitable material basis for further simultaneously optimizing piezoelectric parameters.
研究领域:
材料科学
·
功能陶瓷
·
压电材料
·
固溶体
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介电物理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Dielectrics
·
2022
·
IF 0
Xudong Qi,Kai Li,Lang Bian,Enwei Sun,Limei Zheng,Rui Zhang
Relaxor-based ternary Pb( In 1 / 2 Nb 1 / 2 )O 3 –Pb( Mg 1 / 3 Nb 2 / 3 )O 3 –PbTiO 3 (PIN–PMN–PT) single crystals and ceramics are promising candidates for high-performance electromechanical conversion devices. It is known that the domain structure and dielectric diffusion–relaxation characteristics are crucial to the excellent performances of relaxor ferroelectrics. In this work, we prepared the PIN–PMN–PT ceramics with various PIN/PMN proportions and systematically investigated their domain structure and dielectric diffusion–relaxation properties. The effect of PIN/PMN proportion on the domain size and dielectric diffusion–relaxation characteristics was also studied. The investigations showed that PIN–PMN–PT ceramics presented multi-type domain patterns comprising irregular island domains and regular lamellar domains. Moreover, the dependent relations of PIN/PMN proportions on the dielectric diffusion and domain size indicated that the PIN composition has a stronger lattice distortion than PMN composition; increasing the PIN proportion can enhance the dielectric diffusion and decrease the domain size. Our results could deepen the understanding of structure–property relationships of multicomponent relaxor ferroelectrics and guide the design and exploration of new high-performance ferroelectric materials.
研究领域:
材料科学
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凝聚态物理
✓ 已验证
DOI
INORGANICA CHIMICA ACTA
·
2018
·
IF 2.264
Jun-Xia Xiao,De-Yun Ma
Two new 3D Zn(II)/Pb(II)-based MOFs, {[Zn 9 (mbpdc) 7 (3,3′-dmbpy) 2 ( μ 3 -OH) 4 ]·(H 2 O) 5 } n ( 1 ), and {[Pb 11 (mbpdc) 7 (μ 4 -O) 3 ( μ 3 -OH) 2 ]·(H 2 O)} n ( 2 ) ((H 2 mbpdc = 2-methyl-4,4′-biphenyldicarboxylic acid, 3,3′-dmbpy = 3,3′-dimethyl-4,4′-bipyridine) have been synthesized and were structurally characterized. Complex 1 exhibits 3D network with 10-connected ile topology and is comprised of pentanuclear (Zn 5 N 2 O 18 ) units bridged by mbpdc ligands and further pillared by 3,3′-dmbpy struts. Complex 2 is a new 3D lead(II) MOF constructed by dodecanuclear {Pb 12 (COO) 16 ( μ 3 -OH) 2 ( μ 4 -O) 4 } units and mbpdc ligands. Furthermore, the luminescence and the catalytic activities of 1 – 2 for the degradation of methyl orange in a Fenton-like process have also investigated.
研究领域:
材料化学
·
配位化学
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产品关联
DOI
高影响因子
Micromachines
·
2017
·Vol. 8
·期 3
·86
·
IF 1.833
Xuxing Zhu,Jianhua Tong,Chao Bian,Chengyao Gao,Shanhong Xia
The sensitive detection of trace levels of heavy metal ions such as Pb2+is of significant importance due to the health hazard they pose. In this paper, we present a polypyrrole (PPy)/multiwalled carbon nanotube (MWCNT)-modified Au microelectrode. The PPy/MWCNT composite film was electrochemically deposited on the microelectrode by cyclic voltammetry (CV). The composite film was investigated by scanning electron microscope (SEM), CV, and electrochemical impedance spectroscopy (EIS), and the results show that this film presents a uniformly distributed and web-like entangled structure and good conductivity. Differential pulse stripping voltammetry (DPSV) was applied to determine trace levels of Pb2+. Experimental conditions including accumulation time and deposition potential were optimized. In optimal conditions, the PPy/MWCNT-modified microelectrode performed sensitive detection of Pb2+within a concentration range from 1 to 100 μg·L−1, and the limit of detection was 0.65 μg·L−1at the signal-to-noise ratio of three.Keywords:polypyrrole/multiwalled carbon nanotube;Au microelectrode;differential pulse stripping voltammetry;Pb2+
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Kun Wang,Hongliang Zhang,Guoxin Chen,Tian Tian,Kai Tao,Lingyan Liang,Junhua Gao,Hongtao Cao
The complementary electrochromic devices based on WO 3 and Prussian blue electrodes (PB) have shown a limited chemical stability and durability because WO 3 is degraded in electrochromic performance and PB is gradually dissolved in the Li + -based electrolyte under neutral pH conditions. Herein, the utilization of acetic acid as super-additive solution was proposed to improve WO 3 cathodes and stabilize PB anodes, in which the highly nanoporous nanocrystal-in-glass WO 3 and hierarchical PB was made by electron beam evaporation and electrochemical deposition method, respectively. Our findings suggest that synergistic effects of Li + and H + on WO 3 and Prussian blue electrodes contribute to the improvement on electrochemical, electrochromic, and cycling stability performance of the whole device. Impressively, the WO 3 -PB complementary electrochromic device could experience a superior long-term cycling stability of over 10,000 cycles, with a high coloration efficiency of 137.80 cm 2 C −1 and a maximum transmittance modulation of 66.22%@ 633 nm. All these results open a new way to the construction of high-performance electrochromic devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Duanlian Tang,Zhuo Xiong,Ping Lu,Siqi Wang,Xiaoyan Chen,Xiaoyu Lou,Mingzhu Zheng,Song Chen,Changshen Ye,Jie Chen,Ting Qiu
Lacunary polyoxometalates (LPOMs), showing merits of designable coordination sites, may offer tremendous potential in toxic Pb(II) capture. However, their utilization is limited by their solubility in water and difficulty in reuse. Here, we report a self-assemble strategy to encapsulate LPOMs in customized cavities of ZIFs to afford reusable LPOM@ZIF adsorbents, with vacant oxygen sites tuned to afford efficient Pb(II) adsorption. It exhibited outstanding capture capacity of 764 mg g −1 , extraordinary affinity with K d of 2.87 × 10 7 mg L −1 , and ultrarapid efficiency with h of 412.5 mg g −1 min −1 that could enable ultradeep water purification from 71770 ppb to 1.84 ppb within 15 min. Density functional theory calculation and experiments validated the contribution of oxygen in LPOMs on this impressive Pb(II) adsorption followed μ 1 O > μ 2 O > μ 3 O, and NH on ZIFs was another site. Outcomes thus reveal LPOM@ZIF is an appealing platform for ultradeep Pb(II) removal that could address the most urgent global health challenges.
研究领域:
环境科学
·
材料科学
✓ 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）