CHEMOSPHERE
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2021
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IF 7.086
Ni Tang,Xue Liu,Meng-Ru Jia,Xin-Yao Shi,Jing-Wei Fu,Dong-Xing Guan,Lena Q. Ma
In this study, a two-step functionalizing strategy by combining co-condensation with grafting procedures was employed to synthesize well-ordered Amino- and Thiol-Bifunctionalized SBA-15 (ATBS) mesoporous silica. Its physicochemical properties , performance, and mechanisms in immobilization of toxic metals Pb and Cd in water and soil were investigated. After bi-functionalization, X-ray diffractometer , transmission electron microscope , and N 2 adsorption-desorption measurements confirmed that the ATBS maintained a highly-ordered mesoporous structure, large surface area and pore volume. The elemental analysis, Fourier transform infrared spectroscopy and X-ray Photoelectron Spectroscopy (XPS) evidenced the successful incorporation of amine and thiol groups into ATBS. These structure and functional characteristics of ATBS benefited Pb and Cd sorption . Sorption isotherms of Pb and Cd were better fit with Sips and Redlich-Peterson models. Sorption kinetics suggested that Pb sorption was mainly regulated by chemical reactions, whereas both diffusion process and chemical reactions were rate-regulating steps in Cd sorption. ATBS showed the maximum sorption capacities for Pb and Cd at 120 and 38 mg g −1 , respectively. The sorption mechanisms revealed by XPS measurements suggested that Cd sorption was mainly attributed to thiol groups while Pb was efficiently bond to both thiol and amino groups. High and stable sorption efficiencies were attained in the pH range of 4–6, with a higher affinity towards Pb than Cd. Furthermore, its ability to immobilize Pb and Cd in soils was examined with an incubation experiment, which showed that ATBS reduced 30–56% of MgCl 2 -extractable Pb and Cd in a contaminated soil. The synthesized sorbent via the two-step functionalizing strategy shows high sorption efficiency towards Pb and Cd, and thus it has potential application in remediating Pb and Cd contaminated water and soils.
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DOI
高影响因子
ACS Omega
·
2022
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IF 4.132
Jialu Huang,Zhiming Ni,Xiaofan Song,Han Li,Xiaolei Chen,Aichuang Zhang,Hu Yang,Yuan Liu,Peng Zhu,Ping Hua,Xiaolei Yuan
PdPb nanocrystals have drawn considerable attention due to their excellent catalytic properties, while their practical applications have been impeded by the severe degradation of activity, which is caused by the adsorption of intermediates (especially CO) during the operation. Herein, we first present porous PdPb alloys with the incorporation of amorphous Pb(OH)2 species as highly active and stable electrocatalysts. Alloying Pd with Pb species is initially proposed to optimize the Pd–Pd interatomic distance and adjust the d-band center of Pd. Importantly, the amorphous Pb(OH)2 species are beneficial to promoting the formation of OHad and the removal of COad. Therefore, PdPb-Pb(OH)2 catalysts show a mass activity of 3.18 A mgPd–1 and keep excellent stability for the ethanol oxidation reaction (EOR). In addition, further CO stripping and a series of CO poisoning experiments indicate that PdPb-Pb(OH)2 composites possess much better CO tolerance benefiting from the tuned electronic structure of Pd and surface incorporation of Pb(OH)2 species.
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DOI
高影响因子
iScience
·
2023
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IF 5.8
Han Wang,Dongtian Miao,Yongjiang Yu,Zhihan Zhang,Youlong Zhu,Qing Wang
Lead (Pb(II)) contamination is common in liquid foods and can result from Pb(II) being present in the raw materials or during handling processes. However, due to the complexity of food matrices, there is limited data available concerning Pb(II) ion removal from food sources. This study focused on fabricating a PVA/PAA/DMTD electrospun nanofibrous membrane (ENFM) to efficiently and selectively remove Pb(II) ions from liquid foods. The PVA/PAA/DMTD ENFM had a maximum adsorption capacity of 138.3 mg/g for Pb(II) ions and demonstrated high selectivity toward the removal of Pb(II) ions. Negative values of the Gibbs free energy (Δ G °) showed that the spontaneous nature of the adsorption process was feasible at different temperatures. Moreover, it successfully removed Pb(II) ions from selected samples of commercially available drinks. Therefore, this adsorbent exhibits significant potential for removing Pb(II) ions from liquid food products, thereby reducing daily dietary exposure to Pb(II).
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DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2021
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IF 4.156
Xiaocong Zhong,Zhencong Lin,Chen Chen,Ruixiang Wang,Shuiping Zhong,Zhifeng Xu
The nonferrous metal electrowinning process is energy intensive due to the sluggish dynamics of the oxygen evolution reaction (OER) on the anode. Developing novel anode materials with high OER activity and stability is imperative. Herein, we propose a novel Pb-ceramic composite anode by introducing ZnFe 2 O 4 . In this work, Pb-ZnFe 2 O 4 and PS-Pb anodes were prepared through powder pressing and sintering processes. The effects of ZnFe 2 O 4 particles on the phase composition, surface morphology and inner structure of the oxide layer formed on Pb-ZnFe 2 O 4 anodes were investigated. Furthermore, the role of ZnFe 2 O 4 in the anodic potential and stability of Pb-ZnFe 2 O 4 anodes was discussed. The results show that as the ZnFe 2 O 4 content increases, the oxide layer formed on Pb-ZnFe 2 O 4 anodes exhibits higher surficial compactness, higher integrity, and much smaller thickness. ZnFe 2 O 4 exhibits a trivial impact on the oxygen evolution dynamics. However, the anodic potential of the Pb-ZnFe 2 O 4 anode declines as the ZnFe 2 O 4 content increases, which could be attributed to the higher compactness and smaller thickness of the oxide layer. As the ZnFe 2 O 4 content increases, the weight loss of the Pb-ZnFe 2 O 4 composite anode increases, suggesting the unsatisfactory stability of Pb-ZnFe 2 O 4 , which could be attributed to the inevitable dissolution of ZnFe 2 O 4 particles, smaller thickness of the oxide layer and larger porosity of the substrate. Although Pb-ZnFe 2 O 4 composite anodes have the potential to reduce energy consumption, their unsatisfactory stability limits the feasibility of Pb-ZnFe 2 O 4 anodes in the electrowinning industry.
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Si Liu,JinHui Huang,Wei Zhang,LiXiu Shi,KaiXin Yi,ChenYu Zhang,HaoLiang Pang,JiaoNi Li,SuZhou Li
In this study, the adsorption behavior of Pb(II) on natural-aged and virgin microplastics in different electrolyte solutions was investigated. The results demonstrated that natural-aged microplastics exhibited higher adsorption capacity for Pb(II) compared to virgin ones, and the addition of CaCl 2 strongly inhibited the adsorption amount of Pb(II). The adsorption kinetics of Pb(II) adsorption were better fitted by the pseudo-second order model and Elovich equation, and were slowed down greatly at higher ionic strength. The rate-limiting steps of adsorption process were dominated by intra-particle diffusion. The adsorption isotherm of Pb(II) onto microplastics affected by salt ions can be well described by Freundlich model, the greater adsorption efficiency of natural-aged microplastics proved that adsorption process was multilayer and heterogeneous. In addition, pH significantly influenced the adsorption of Pb(II) due to the changes electrostatic interactions. The effect of fulvic acid in the electrolyte solutions was also revealed and attributed to the complexation with Na + and Ca 2+ . Furthermore, the higher pH and ionic strength in different environmental water dramatically decreased adsorption capacity onto microplastics. Finally, it’s confirmed that the adsorption mechanisms affected by salt ions mainly involve electrostatic interaction, surface complexation, and ionic exchange. These findings indicate that salt ions exert an important influence on the adsorption of heavy metals for MPs, which should be further concerned.
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Gang Yu,Kuo Han,Jing Wang,Xiao Cheng,Hongmei Ma,Hongya Wu,Zhigang Yang,Guanglei Zhang
In the present work, the activated carbon fibers (ACFs) with homogenous and crystalline CeO 2 -ZrO 2 coatings were obtained using a facile water steam treatment process at a low temperature (300 °C) for efficient removal of Pb(II) from aqueous solutions. The morphology, surface chemical states, and adsorption performance were studied extensively. Results demonstrated that the steam-treated CeO 2 -ZrO 2 /ACFs possessed superior high surface areas (783.23 m 2 g −1 ) and pore volumes (0.41 cm 3 g −1 ). Moreover, numerous C-O-M bonds formed in the interface between CeO 2 -ZrO 2 coatings and ACFs, which can endow the adsorbent desired mechanical property and service durability as well as many surface hydroxyl groups were found and adsorption capacity (61.54 mg g −1 at pH 6.5 ± 0.3 and 25 °C). It was suggested that the steam-treated CeO 2 -ZrO 2 /ACFs could be considered as a promising adsorbent towards wastewater treatment .
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
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IF 9.229
Hao Dong,Shefiu Kareem,Xiao Gong,Jian Ruan,Peng Gao,Xuedong Zhou,Xiaoqing Liu,Xiujian Zhao,Yi Xie
Lead halide perovskite (LHP) nanomaterials have attracted tremendous attention owing to their remarkable optoelectronic properties. However, they are extremely unstable under moist environments, high temperatures, and light illumination due to their intrinsic structural lability, which has been the critical unsolved problem for practical applications. To address this issue, we propose a facile and environmentally friendly ligand-free approach to design and synthesize rod-like CsPb2Br5-embedded Pb(OH)Br with excellent stability under various harsh environments such as soaking in water, heating, and ultraviolet (UV) illumination. Plate-like CsPbBr3- and Cs4PbBr6-embedded Pb(OH)Br powders are first formed by evaporating the solvent in a dispersion of ethanol (or methanol, isopropanol), Cs2CO3, and PbBr2. Upon soaking in water, the plate-like sample undergoes phase transformation from CsPbBr3 and Cs4PbBr6 to CsPb2Br5 and shape conversion from nanoplate to a microrod, leading to the formation of rod-like CsPb2Br5-embedded Pb(OH)Br. The stable Pb(OH)Br coating effectively prevents the luminescent CsPb2Br5 nanocrystals from reacting with water, leading to extremely high aqueous stability of the CsPb2Br5-embedded Pb(OH)Br. The photoluminescence (PL) intensity of the representative CsPb2Br5-embedded Pb(OH)Br sample can maintain 92.2% of the initial PL intensity value even after soaking in room-temperature water for 165 days; in the meantime, the phase and shape are preserved. The typical sample also shows outstanding stability under hot water, UV illumination, and annealing conditions. The ultrahigh aqueous stability, thermal stability, and photostability of the CsPb2Br5-embedded Pb(OH)Br nanomaterials suggest an effective, facile, and environmentally friendly technique to grow perovskite-based nanomaterials for promising practical applications in the optoelectronic field.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2018
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IF 3.909
Yikang Yan,Gutha Yuvaraja,Chunjiang Liu,Lingjun Kong,Kai Guo,Guda Mallikarjuna Reddy,Grigory V. Zyryanov
Lead is one of the highly toxic metals reaching the water bodies from industries and discarded domestic wastes. Chitosan and its derivatives can be used to modify magnetic materials to promote the adsorption properties of the magnetic materials for the removal of metal ions. The obtained ECCSB@Fe 3 O 4 was characterized by XRD, FTIR, SEM, TEM and VSM analysis. The effect of solution pH, adsorbent dosage, contact time , initial metal ion concentration and temperature effect was studied. The results of the batch sorption kinetic experiments were substituted into the pseudo-first order, pseudo-second order and intraparticle diffusion models. The R 2 and SSE results show that pseudo-second order equation describes the sorption process very well. Adsorption process revealed that the initial uptake of Pb(II) was rapid and equilibrium was achieved within 105 min. Langmuir and Freundlich adsorption isotherm models were applied to represent adsorption isotherm data. The equilibrium data were well fitted by the Langmuir isotherm model by revealing the maximum sorption capacity value 86.20 mg/g of ECCSB@Fe 3 O 4 . Different thermodynamic parameters, namely, changes in standard Gibbs energy, enthalpy, and entropy, were also evaluated from the temperature dependence, and the results suggest that the adsorption reaction is spontaneous and endothermic in nature.
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DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
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IF 3.1
Bian Hang,Li Peng,Ma Yu,Liu Lin,Li Dong,Zhang Ning
In recent years, the surge in industrialization and urbanization has led to the release of a significant amount of heavy metal ions into water. These ions, when present in drinking water, can enter the human body and cause irreversible health problem. Metal-organic frameworks (MOFs) have drawn considerable attention for their outstanding ability to remove these heavy metal ions. However, MOF powders tend to aggregate in water, reducing their adsorption efficiency and potentially leading to secondary environmental pollution. In this regard, the development of MOF composites that are highly adsorptive, recyclable, and maintain stable dispensability in water is crucial for heavy metal ions removal. Herein, the in situ growth of zeolitic imidazolate framework (ZIF-8) on melamine sponge (MS) using a secondary growth method is reported. The resultant composite sponges exhibit high efficiency in adsorbing Pb(II) and Cu(II) from water and maintain good reusability. These findings offer a promising method in efficiently eliminating Pb(II) and Cu(II) from aqueous solutions.
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DOI
高影响因子
SOLAR ENERGY
·
2020
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IF 4.608
Bing Liu,Rongli Cui,Huan Huang,Xihong Guo,Shouwei Zuo,Jinquan Dong,Huanli Yao,Ying Li,Dangui Zhao,Jiahao Wang,Jing Zhang,Yu Chen,Junliang Yang,Baoyun Sun
The crystal structure of perovskite has a significant influence on the photovoltaic performance and stability of perovskite solar cells (PSCs). Pb 4+ is introduced into CH 3 NH 3 PbI 3 (MAPbI 3 )-based PSCs by participating the octahedral [PbI 6 ] 4- structure, then to induce the formation of stronger Pb-I bond and reduce [PbI 6 ] 4- octahedron distortion, which would improve structural symmetry, decrease the degree of disorder and be beneficial to the crystallization of perovskites . Synchrotron based X-ray absorption fine spectroscope (XAFS) revealed that the existence of higher valence state lead could be realized by doping Pb 4+ directly or induced by electron withdrawing group, in consequence the [PbI 6 ] 4- octahedral structure becomes more stable. Grazing incidence X-ray diffraction (GIXRD) especially demonstrates that Pb 4+ with appropriate proportion may well replace part of Pb 2+ to form an uniform phase in the primal perovskite structure to improve the crystallization on the surface and homogeneous out-of-plane (OOP) ordered crystal accumulation in the bulk, which is also important for improving the efficiency and stability of PSCs. As a result, a power conversion efficiency (PCE) exhibits a 42.1% increase with the doping of 0.03% PbF 4 and 0.075% PCBM compared with a pristine device and its stability improves markedly after 30 days of storage in ambient atmosphere.
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DOI
高影响因子
Advanced Energy Materials
·
2026
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IF 25.5
Wendong Zhu,Qiuxiang Wang,Haoming Xing,Jing Zhang,Yuanyuan Wang,Yuhong Xu,Jiaxing Xiong,Rong Xuan,Wenwu Xu,Da Chen,Xiaohui Liu,Like Huang,Yuejin Zhu,Changlei Wang
Solution-processed SnO 2 nanoparticles are promising nonfullerene electron transport materials, yet their performance in low-bandgap (LBG) tin-lead perovskite solar cells (Sn-Pb PSCs) is hindered by inadequate charge transport and interface energy misalignment. To address these issues, we developed a SnO 2 -graphene quantum dot (GQD) electron transport layer (ETL) by functionalizing solution-processed SnO 2 with GQDs. Both theory calculations and experiments indicate the electron-bridging role of GQDs in perovskite/GQD-SnO 2 heterojunction, greatly facilitating directional charge transfer. Moreover, GQDs play a dual role by passivating defects on both SnO 2 and perovskite surfaces, while optimizing the energy level alignment at this critical interface. Consequently, the optimized LBG Sn-Pb PSCs exhibit significantly enhanced voltage and fill factor, achieving a champion efficiency of 23.38% with robust stability under ISOS-L-1 and ISOS-D-2 protocols. When integrated into all-perovskite tandem solar cells, the optimized device delivers a promising efficiency of 29.40%. This work enables the first viable inorganic ETL for realizing high-performance Sn-Pb PSC and its tandem applications.
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产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2026
·
IF 3.6
Yaozu Li,Chao Wei,Wenjing Zhang,Huiyi Zhang,Bo Zhao,Bingbing Zhang,Ying Wang
Abstract Current birefringent crystals (e.g., MgF2, α-BBO, and YVO4) are limited by either small birefringence or insufficient deep-UV transparency. Achieving both properties simultaneously remains a key challenge. To address this issue, recent research based on the “confined π-conjugated” strategy has turned its attention to fluoroaluminoborates. In this structural design, non-π-conjugated [Al−O/F] units connect and isolate planar π-conjugated groups, effectively broadening the bandgap while maintaining optical anisotropy. Building on this concept and incorporating different cations, this study reports two new fluoroaluminoborate compounds: CaAlB3O6F2 (CABOF) and its isostructural analogue, PbAlB3O6F2 (PABOF). In PABOF, the introduction of Pb2+ induces local structural distortion, thereby enhancing the optical anisotropy. Both CABOF and PABOF exhibit birefringence values exceeding 0.1 at 546 nm, with PABOF demonstrating the largest birefringence among the known fluoroaluminoborates. In addition, both compounds exhibit excellent thermal stability. This work identifies two potential UV-birefringent materials, further enriching the fluoroaluminoborate family.
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DOI
高影响因子
危险品化学品经营许可证（带存储）