COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yingying Wang,Fuyu Zhang,Mengshuo Du,Bihe Chen,Yifeng Xu,Wenzhi Tang,Zhonghong Li
Highly toxic Pb(Ⅱ) and Cd(Ⅱ) persist in water and soil, disrupting ecosystems while threatening human health through bioaccumulation. Metal-organic frameworks (MOFs) as adsorbents toward heavy metal ions have garnered significant research attention. However, their adsorption capacity and retrieval are limited by small pore size and powder form. Herein, we designed a defective MIP-202 composite aerogel (DMCA) to efficiently remove Pb(Ⅱ) and Cd(Ⅱ). Mixed ligand (mercaptosuccinic acid) and modulator (butyric acid) were involved in the synthesis of MIP-202, and competed with the original amino acid ligand for binding to Zr clusters leading to the disruption of the original structure of MIP-202 and defect formation. Defective MIP-202 (D-MIP-202) possessed larger BET surface area (from 35.79 to 129.57 m 2 /g) and pore size (from 6.16 to 11.78 nm). Moreover, D-MIP-202 powder and sodium alginate were synthesized into DMCA with abundant adsorption sites and porous structures to enhance the sorption capacities, which were 434.7 mg/g (Pb(II)) and 202.6 mg/g (Cd(II)). The adsorption process primarily occurs on the heterogeneous surface of the material and represents a spontaneous chemisorption behavior. The adsorption mechanism is attributed to chelation, and ion exchange. This study presents an effective strategy for the remediation of heavy metal ions in aqueous systems.
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InfoMat
·
2024
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IF 22.7
Huan Li,Yu Gao,Xin Hong,Kanghui Ke,Zilong Ye,Siwei Zhang,Kefei Shi,Zhuo Peng,Hao Yan,Man-Chung Tang,Youwei Yao,Ben Zhong Tang,Guodan Wei,Feiyu Kang
Broadband photodetectors (PDs) capable of multi-wavelength detection have garnered significant interest for applications in environmental monitoring, optical communication, spectral analysis, and imaging sensing. Low-bandgap Pb–Sn hybrid perovskite photodetectors can extend the spectral response from the ultraviolet–visible (UV–vis) range to the near-infrared (NIR) and reduce the toxicity associated with Pb 2+ . The strategic introduction of Sn 2+ into Cs 0.15 FA 0.85 Pb x Sn 1− x I 3 ( x = 1, 0.8, 0.6, 0.5, 0.4, 0.2, and 0) not only preserves the cubic crystal structure with conformal multigrain growth but also broadens the film's absorption spectrum from 800 to 1000 nm NIR region. This indicates a well-controlled tunability of the Pb–Sn binary perovskite system. Specifically, the self-powered photodetector with a device structure of ITO/NiO x /PTAA/Cs 0.15 FA 0.85 Pb 0.5 Sn 0.5 I 3 /PCBM/BCP/Ag has shown remarkable optoelectrical properties. It exhibits a high external quantum efficiency (EQE) of up to 80% across the spectrum from 300 to 1000 nm, a responsivity ( R ) exceeding 0.5 A/W, and high detectivity ( D *) value of 1.04 × 10 12 Jones at 910 nm and 3.38 × 10 11 Jones at 1000 nm after weak attenuation. Intriguingly, the dark current of the Cs 0.15 FA 0.85 Pb 0.5 Sn 0.5 I 3 device is four orders of magnitude lower than that of devices made with pristine Pb or Sn only, strongly correlating with its significantly increased built-in potential and reduced trap density. Consequently, it demonstrates a −3 dB bandwidth of 2.23 × 10 4 Hz, fast rise and decay times of 61 and 30 μs, respectively, and a linear dynamic range (LDR) of 155 dB. Benefiting from its high sensitivity, a 5 × 5 PD array for NIR imaging and non-invasive pulse detection for photoplethysmography applications has been successfully demonstrated, showcasing the prosperous potential of Pb–Sn hybrid perovskite in the NIR range.
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Membranes
·
2025
·Vol. 15
·期 9
·264
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IF 3.6
Shuhang Lu,Qianhui Xu,Mei-Ling Liu,Dong Zou,Guangze Nie
The efficient purification of Pb(II)-containing wastewater is essential for safeguarding public health and maintaining the aquatic environment. In this study, novel hydrous ferric oxide (HFO) nanoparticle-embedded poly(vinylidene fluoride) (PVDF) composite adsorption membranes were developed through a simple blending method for efficient Pb(II) removal. This composite membrane (denoted as HFO-PVDF) combines the excellent selectivity of HFO nanoparticles for Pb(II) with the membrane’s advantage of easy scalability. The optimized HFO-PVDF(1.5)membrane achieved adsorption equilibrium within 20 h and exhibited excellent adsorption capacity. Moreover, adsorption capacity markedly enhanced with increasing temperature, confirming the endothermic nature of the process. The developed HFO-PVDF membranes demonstrate significant potential for real-world wastewater treatment applications, exhibiting exceptional selectivity for Pb(II) in complex ionic matrices and could be effectively regenerated via a relatively straightforward process. Furthermore, filtration and dynamic regeneration tests demonstrated that at an initial Pb(II) concentration of 5 mg/L, the membrane operated continuously for 10–13 h before regeneration, treating up to 200 L/m2of wastewater before breakthrough, highlighting potential for cost-effective industrial wastewater treatment. This study not only demonstrates the high efficiency of the HFO-PVDF membrane for heavy metal ion removal but also provides a theoretical foundation and technical support for its practical application in water treatment.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Kanghui Ke,Yu Gao,Jiazhi Meng,Yi He,Bohua Deng,Haoyu Huang,Si-Wei Zhang,Kai Zhang,Zhuhua Xu,Huan Li,Xiongxian Yao,Zilong Ye,Liping Song,Chang Shu,Shihe Yang,Ni Qin,H. Y. Fu,Hin-Lap Yip,Feiyu Kang,Guodan Wei
Developing stable and efficient photodetectors (PDs) for environmentally friendly applications such as biological imaging, optical communications, and wearable electronics demands novel materials with improved optoelectronic properties. Herein, by precisely controlling the Pb 2 ⁺ content (3%, 6%, and 12%) using a galvanic displacement reaction (GDR), we created a mixed 2D/3D phase structure that enhances the quality of the Sn-Pb thin films, which improved crystalline orientation, suppressed trap-assisted recombination and reduced Sn 2+ oxidation processes, resulting in superior environmental stability under air exposure conditions. The flexible device demonstrated robust stability, maintaining performance after 4000 bending cycles or 96 h of storage in ambient conditions. The self-powered quasi-2D Sn-Pb PDs exhibit an impressively low dark current of 1.2 × 10 −8 A cm −2 , rapid rise and decay time of 684 and 683 ns, a peak responsivity of 405 mA W −1 , and a peak detectivity of 1.19 × 10 13 Jones at 710 nm. Additionally, under LED illumination (λ = 910 nm), the photodetectors also demonstrate high fidelity in optical signal transmission, successfully facilitating encrypted communication sequences and image transmission at a rate of 25 kbps. This work presents a promising strategy for developing high-performance, stable quasi-2D Sn-Pb perovskite photodetectors, highlighting their potential for next-generation photodetectors in flexible, real-world environments.
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Journal of Chemistry
·
2024
·Vol. 2024
·期 1
·2510050
·
IF 2.8
Baoqiang Zhang,Bo Zhao,Longfei Xia,Yingying Sun,Tianqing Chen,Hailan Shi
In order to explore a medium material for the efficient treatment of Pb(II) pollutants in groundwater, in this paper, mudstone is selected as the medium material, and the morphological structure of the mudstone is characterizes via X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET) analyses to study the feasibility of the mudstone adsorbing Pb(II) ions. Then, static adsorption experiments are carried out to investigate the removal effect of mudstone on Pb(II) in aqueous solutions under different conditions and to determine the optimal adsorption conditions. Finally, the results are fitted and analyzed using a thermodynamic model to explore the adsorption mechanism of the mudstone. The main results of this study are as follows. The main mineral composition of the mudstone used in the experiments includes CaCO 3 , SiO 2 , CaAl 2 O 4 ·10H 2 O, and CaFe 4 O 7 . The specific surface area of the mudstone is as high as 23.027 m 2 ·g −1 , the pore size is 9.145 nm, and its surface structure is rough, with pores and fissures developed. The pore space and adsorption capacity of the mudstone were enhanced. When 1 g·L −1 of mudstone was added, the pH value of the solution was 6, the reaction time was 60 min, and the initial concentration of Pb(II) was 30 mg·L −1 . The removal efficiency of Pb reached 84.5%, and the adsorption amount was 25.352 mg·g −1 . For the removal of Pb(II) from the aqueous solution by the mudstone under different concentrations of Pb(II), the reaction was in accordance with the Langmuir adsorption isotherm model, and the maximum adsorption amount reached 54.975 mg·g −1 . The relationship between the removal of Pb(II) and the reaction time was in accordance with the pseudo-second-order rate model. The results of this study suggest that mudstone can be used for the removal of Pb(II) from aqueous media.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Ruike Wang,Mingzhi Yang,Yingying Wu,Rundong Liu,Mengchen Liu,Qiong Li,Xiao Su,Yongjuan Xin,Wenqian Huo,Qihong Deng,Yue Ba,Hui Huang
To investigate the mechanism of Silent information regulator 1 (SIRT1) regulation of DNA methylation and thus the expression of synaptic plasticity-related genes induced by lead (Pb) exposure, the early-life Sprague-Dawley rats and PC12 cells were used to establish Pb exposure models and treated with SIRT1 agonists (resveratrol and SRT1720). In vivo results demonstrated that Pb exposure increased the expression of DNMTs, MeCP2, PP1 and cleaved caspase3, decreased the expression of SIRT1, BDNF and RELIN and altered DNA methylation levels of synaptic plasticity genes. Moreover, we observed marked pathological damage in the hippocampal CA1 region of the 0.2 % Pb-exposure group. After treatment with resveratrol, the effects of Pb exposure on the expression of the above molecules and pathological features were significantly ameliorated in the hippocampus of rats. In vitro results showed that after the treatment with SRT1720, the expression of SIRT1 was activated and thus reversed the effect on DNMTs, MeCP2, apoptosis and synaptic plasticity-related genes and their DNA methylation levels induced by Pb exposure. In conclusion, we validated the important protective role of SIRT1 in neurotoxicity induced by Pb exposure through in vivo and in vitro experiments, providing potential therapeutic targets for the treatment and prevention of brain damage.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Pubao Peng,Song Li,Yaru Gong,Jiajun Nan,Congmin Liang,Yang Geng,Di Li,Dewei Zhang,Shihua Zhang,Guodong Tang
Here, Pb/Y codoped SnSe nanorods were fabricated via a bottom-up, cost-effective hydrothermal method. The formation of nanorod structures generating high-density grain boundaries significantly enhances phonon scattering, serving as the primary mechanism for lattice thermal conductivity reduction. Furthermore, Y-element enrichment regions, nanoprecipitates, and dense dislocation networks provide additional phonon scattering that further suppresses phonon transport. These multiscale structural features synergistically impede phonon propagation across all frequency ranges, ultimately yielding an ultralow κL of 0.157 W m–1 K–1 at 873 K in the Pb and Y codoped SnSe nanorods. Meanwhile, Pb/Y codoping enhances carrier concentration, leading to a sharp increase in electrical conductivity in Sn0.99–xPb0.01YxSe nanorods. Concurrently, the electrical transport properties are significantly improved, resulting in enhanced power factor. As a result, this carrier and phonon synergistic optimization contributes to a peak ZT of 1.74 at 873 K in Sn0.985Pb0.01Y0.005Se nanorods. This work provides insights for developing high-performance polycrystalline SnSe through advanced doping strategies and structural design.
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Sustainability
·
2025
·Vol. 18
·期 1
·
IF 3.3
Runlai Luo,Nan Zhao,Zhengmiao Jia,Sihan Wu,Xing Chen,Zhongyuan Li,Feng Ju,Yongming Luo,Hui Li
The simultaneous stabilization of Cu, Ni, Pb, and As in sustainable environmental development remains a significant challenge in heavy metal remediation. In this paper, liquid phase equilibrium experiments have evaluated the immobilization efficiency of 20 potential stabilization materials. Soil stabilization experiments, material characterization, and long-term effectiveness assessments have been performed to investigate the efficient composite stabilization agent and its underlying mechanisms. Results demonstrate that seven materials, including calcium oxide (CaO) and hydroxyapatite (HAP), exhibit multi-metal immobilization capabilities. Among single-material stabilization in soil, HAP for Pb, zero-valent iron (ZVI) for As, and blast furnace slag (BFS) for Cu exhibit prominent stabilization efficiency, yet they cannot efficiently stabilize the four heavy metals simultaneously. Subsequently, the ZVI:BFS:CaO composite agent (6:3:1 mass ratio, 10% addition rate) has been proposed by formulation optimization, achieving remarkable stabilization rates: 99.92% for Cu, 96.16% for Ni, 92.06% for Pb, and 99.58% for As. XRD, XPS, and SEM-EDS analyses confirm that the stabilization occurs through synergistic mechanisms including precipitation, complexation, and lattice encapsulation. The composite stabilizing agent withstood 15 wet–dry and 150 freeze–thaw cycles, with four types of heavy metals stabilization rates > 60%, confirming its long-term effectiveness.
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Nature Communications
·
2025
·Vol. 16
·期 1
·10078
·
IF 15.7
Zheng Weilin,Chen Jiangkun,Guo Yang,Zhang Xin,Chun Fengjun,Cao Yaxin,Gao Xiaoping,Suo Hao,Wei Xiaohe,Xing Zhifeng,Wang Yanze,Wang Feng
CsPbX 3 (X = Cl, Br, I) nanosheets have emerged as a promising platform for tuning quantum confinement effects and achieving efficient optoelectronic devices. However, synthesizing uniform CsPbX 3 nanosheets with monolayer-level thicknesses remains a challenge due to the fast reaction kinetics. Herein, we develop a synthetic strategy that leverages Pb-deficient precursors to control reaction kinetics. Our experimental investigations indicate that Pb deficiency in the precursors decelerates the crystal growth, offering enhanced dimensional control in CsPbX 3 systems. This approach enables the synthesis of uniform CsPbI 3 nanosheets with tunable thickness down to two octahedral layers, which exhibit a narrowband emission at 563 nm and high stability against spectral drift. This method is readily extended to CsPbBr 3 and CsPbCl 3 systems for precise size and shape modulation, thus affording full-color emission tuning within mono-halide perovskites. These findings establish a versatile synthetic strategy poised to advance the design and application of CsPbX 3 nanomaterials and other colloidal nanocrystals.
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JOURNAL OF SOILS AND SEDIMENTS
·
2025
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IF 3
Jin Meiqing,Sun Yuanchao,Chai Bing,Wang Minghu,Wu Yuping,Wu Weihong,Zhou Qingwei,Qiu Linlin,Du Jia,Fu Li
Purpose Decabromodiphenyl ethane (DBDPE) and lead (Pb), two prevalent contaminants in e-waste dismantling areas, pose significant threats to soil ecosystem health. However, the ecotoxicological effects of their co-exposure on soil invertebrates remain poorly characterized. Methods Avoidance behavior, survival rate, and growth-inhibition assays were performed to assess the combined toxic effects of DBDPE and Pb on earthworm ( Eisenia fetida ) in an artificial soil system over exposure periods of 7–21 d. Responses from multiple biochemical biomarkers, including superoxide dismutase (SOD), catalase (CAT), malondialdehyde (MDA), glutathione S-transferase (GST), and acid phosphatase (ACP) were also measured, and the data were integrated by the biomarker response index (BRI). Interaction between Pb and DBDPE on BRI was further analyzed by calculation of effect addition index (EAI). Results Avoidance behavior emerged as the most sensitive endpoint and exhibited concentration-dependent escalation under co-exposure conditions. While individual exposure to DBDPE (0–0.75 mg/kg) induced negligible impacts on growth and mortality, its combination with Pb (1000 mg/kg) resulted in significant synergistic effects. Similarly, biochemical biomarkers—including SOD, CAT, MDA, GST, and ACP—showed markedly greater alterations in co-exposure groups compared to single DBDPE treatments. The BRI revealed only slight alterations in biological health across most treatments. The EAI values indicated that antagonistic effects dominated the interaction between DBDPE and Pb. Conclusion Our findings demonstrated significant variation in biomarker sensitivity to pollutant exposure. Notably, short-term sub-lethal co-exposures may elicit synergistic effects on avoidance, growth, and mortality, revealing a time-concentration toxicity dependency. These results provide novel insights into the interaction between heavy metals and organo-pollutants and highlight the ecological hazards posed by emerging brominated flame retardants (e.g., DBDPE) in heavy metal-contaminated soil systems.
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Frontiers of Chemical Science and Engineering
·
2021
·Vol. 15
·期 5
·1185-1196
·
IF 4.204
Liu Wanyue,Liu Xiaoqin,Chang Jinming,Jiang Feng,Pang Shishi,Gao Hejun,Liao Yunwen,Yu Sheng
The magnetic nitrogen-doped carbon (MNC) was prepared from polypyrrole by a simple high temperature calcination process in this paper. The structure and properties of MNC were analyzed by scanning electron microscope, Fourier transform infrared spectroscopy, X-ray diffraction, Brunner-Emmet-Teller, vibrating sample magnetometer, and X-ray photoelectron spectroscopy. The capacity of MNC to adsorb Cr(VI) and Pb(II) was evaluated. The effects of the initial pH, dosage, concentration and temperature on the adsorption capacity of MNC were measured. MNC had a large specific surface area and a special porous structure. Its nitrogen and carbon sources were rich, and the ratio of carbon to nitrogen was fixed. The maximum Cr(VI)-adsorption capacity and maximum Pb(II) adsorption capacity of MNC could reach 456.63 and 507.13 mg·g −1 at 318 K, respectively. The pseudo-second-order model was used to describe the adsorption kinetics of MNC, and the Freundlich model was employed to discuss its isotherms. The adsorption process was affected by the electrostatic force, the reducing reaction, pores and chelation. The results of this study suggest that MNC is a material with superior performance, and is very easily regenerated, reused, and separated in the adsorption process.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Feng Zhao,Weixia Yang,Yong Han,Xueli Luo,Wenzhi Tang,Tianli Yue,Zhonghong Li
The transformation of metal-organic frameworks (MOFs) to metal-organic gels (MOGs) is an attractive but challenging issue because they are generally regarded as the opposite, with the former being hard and the latter soft. Herein, a straightforward strategy was developed to synthesize amorphous Zr-MOG-12 by gelatinization of UiO-66-NH 2 (i.e. Zr-MOF) via a facile standing time-controlled crystallization method. The precursor ZrCl 4 obtains oxide and hydroxide bridges after standing at room temperature, which promotes the formation of [Zr 6 O 4 (OH) 4 ] 12+ clusters and induces rapid and excessive nucleation rate, and further leads to the coordination perturbation of UiO-66-NH 2 nanoparticles to achieve Zr-MOG-12. The as-prepared Zr-MOG-12 integrates the more hierarchical porous structure of gel-based soft materials and the amorphous structure of lower-coordinated active sites, which exhibits superb adsorption capacity for Pb(II) with excellent selectivity and reusability, indicating that Zr-MOG-12 is more promising to removal Pb(II) in practical water treatment . In addition, the transformation of amorphous Zr-MOG-12 to highly crystaline Zr-MOF’ has been achieved by the solvothermal reorganization using glacial acetic acid as the crystallization promoter. The novel methods proposed in this study successfully link crystalline MOF with amorphous MOG, providing new opportunities for facile preparation and transformation of MOFs and MOGs.
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