JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Chengwei Sun,Gang Song,Lili Chen,Xuemei Ren,Changlun Chen
Magnetic Fe 3 O 4 nanoparticles were coated by polyethyleneimine (PEI), and then Fe 3 O 4 @PEI was further modified with MoS 2 by the hydrothermal method to fabricate 3D flower-like structured magnetic polyethyleneimine@MoS 2 (MP@MoS 2 ) composites, and the composites were served as efficient adsorbents to capture Cr(VI) and Pb(II) from aqueous solution. The effects of temperature, pH, shaking time and environmental conditions on adsorption performance of MP@MoS 2 towards Cr(VI) and Pb(II) have been conducted by batch adsorption experiments. The prepared MP@MoS 2 exhibited high adsorption capacities (192.30 mg/g for Cr(VI) at pH 3.0 and 256.41 mg/g for Pb(II) at pH 6.0) and the adsorption equilibrium could be achieved in a short time. Moreover, MP@MoS 2 composites with high saturation magnetization could be simply separated under an external magnet. Combined experiments and spectral analysis, the underlying adsorption mechanism for Cr(VI) on MP@MoS 2 was mainly attributed to the reduction of Cr(VI) to Cr(III), and the removal of Pb(II) was due to the complexation with sulfur groups and amino-groups. Consequently, the prepared 3D flower-like structured MP@MoS 2 has a great potential for the practical application in removing Cr(VI) and Pb(II) from the aquatic environment.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Songlin Wang,Nan Jiang,Yanyan Liu,Yan Hao,Qiying Zhang,Hongying Niu,Jianji Wang
Methyl phenyl carbonate (MPC) is a versatile carbonate, particularly as an important component in the lithium-ion battery industry. Recently the green synthesis of carbonates from non-toxic feedstocks and efficient catalysts have attracted a considerable amount of interest but the development of a highly active catalyst for this synthesis is a great challenge. Herein, novel Pb-Mg thin nanosheet catalysts with high specific areas and large pore volumes were developed by one-pot hydrothermal approach for the synthesis of MPC without using any solvent. The nanosheets were thoroughly characterized by SEM-EDS, TEM , XPS , NH 3 -TPD, XRD , BET, and H 2 -TPR techniques. It is shown that a diphenyl carbonate (DPC) conversion of 56.6% and an MPC selectivity of 98.8% are achieved by a Pb-Mg nanosheet catalyst with 15 wt% Pb. The activity and selectivity values are significantly higher than the previous best value reported by using transition metal-based catalysts. After the reaction, the nanosheets can be separated by simple centrifugation and can be reused many times without a significant loss of catalytic activity, showing excellent stability and recyclability. A possible mechanism was investigated based on these results. This work provides new insight into accomplishing the efficient and green synthesis of MPC and offers a strategy for synthesizing other asymmetric carbonates.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2020
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IF 3.408
Yunfang Gao,Li Guan,Hanli Fu,Xin Xu,Gaoyuan He,Yan Zhang,Jiahao Wu,Haihua Wu
To overcome the irreversible sulfation and improve the lifespan of lead-acid batteries (LABs), we propose a novel Pb/PbO@C nanocomposite with botryoidal architecture derived from eggplant biomass as effective additives to the negative plates. Such unique structure, sharing a three-dimensional conductive carbon network with macropores , effectively facilitates electron transport and boosts ion diffusion as well as suppresses the growth of PbSO 4 during charge-discharge process. The hierarchical carbon framework is also responsible for dispersing active material Pb to limit the particle aggregation. As a result, the LAB equipped with 2.0 wt% Pb/PbO@C-700 shows an excellent rate capability and outstanding high-rate partial state of charge (HRPSoC) cycling performance of 8.2 times compared to that of the LAB without additive. Pb/PbO@C additive is expected to be a promising candidate for commercial application in LABs.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
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IF 4.61
Hanna Pei,Jing Wang,Qingfeng Yang,Weixia Yang,Na Hu,Yourui Suo,Daohong Zhang,Zhonghong Li,Jianlong Wang
Lead(II) is a highly toxic upon accumulation in the human body and a thorough cleanup of this pollutant in water resources has become a rising worldwide concern. In this study, multi-functional nitrogen-doped carbon-MoS 2 (NC-MoS 2 ) nanohybrid composite was successfully synthesized by a step-by-step approach and applied as an effective heavy metal ions adsorbent. Scanning electron microscopy and energy dispersive X-ray spectrometer analysis presents multilayer irregular nanosheets and reveals the uniform distribution of C, N and O elements in the fabricated nanomaterials , respectively. Powder X-ray diffraction, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirm the functionalization of oxygen-containing functional groups arising from the nitrogen-doped carbon. Particularly, the NC-MoS 2 possesses an excellent adsorption capacity (439.09 mg g −1 ) for Pb(II), which attributes to the integrated physicochemical adsorption resulting from the oxygen-containing functional groups on the surface of nanohybrid composites. The as-prepared NC-MoS 2 exhibits good chemical stability and can be reused 7 times with a slight fading over 80% during cycling, which is essential for its practical applications. All of these demonstrate that NC-MoS 2 can be an efficient material for selectively removal of Pb(II), which suggest its great potential in the utilization of environmental cleanup .
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Muhammad Usman,Adeel Ahmed,Zhijian Ji,Bing Yu,Youqing Shen,Hailin Cong
Heavy metals and endocrine disrupters often co-exist in wastewater, while their possible competition behaviours make uptake removal more challenging. Therefore, β-Cyclodextrin based nanocomposite adsorbent was successfully fabricated (β-Cyclodextrin/ZrO 2 ) for the simultaneous uptake of Pb(II) and Bisphenol A from wastewater. FTIR, XRD , and XPS confirmed the successful fabrication of the β-Cyclodextrin/ZrO 2 nanocomposite. In this setting, oxygen-containing groups are primarily responsible for the Pb(II) binding, while the β-Cyclodextrin cavities adsorb Bisphenol A through host-guest interaction, enabling the simultaneous removal of Pb(II) and Bisphenol A. In the mono contaminant system, the nanocomposite displayed prominent removal ability toward Pb(II) and Bisphenol A with adsorption characteristics of pseudo-second-order, Langmuir, and Freundlich isotherm model. The maximum adsorption capacities were identified for Pb(II) and Bisphenol A to be 274.4 mg/g and 174.9 mg/g at 298 K, respectively. Most importantly, the β-Cyclodextrin/ZrO 2 could efficiently attain simultaneous removal of Pb(II) and Bisphenol A by avoiding their competitive behaviours was due to the different adsorption mechanisms (electrostatic interaction and host-guest interaction). Moreover, the adsorbed Pb(II) and Bisphenol A could be successfully recovered with a slight decline in nanocomposite removal performance even after 4 cycles in the binary-component system. All these findings provide insights into the fabrication of highly effective adsorbent with separated adsorption sites to treat wastewater bearing heavy metal and endocrine disrupters.
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高影响因子
JOM
·
2022
·Vol. 74
·期 3
·915-923
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IF 2.597
Fu Chengcheng,Ru Juanjian,Hua Yixin,Xue Yu,Bu Jiaojiao,Wang Zhiwei,Zhang Yuan
For the decontamination of Pb in a contaminated Sb alloy, the separation behaviors of Sb and Pb are investigated in choline chloride-ethylene glycol deep eutectic solvent (ChCl-EG DES) at 323–363 K. Linear sweep voltammetry measurements are recorded for determining the electrochemical behaviors of Sb and Pb in a 0.1-M SbCl 3 +ChCl-EG solution. The oxidation potentials of Sb and Pb are + 0.021 V and − 0.05 V at 323 K, respectively, which implies that the addition of SbCl 3 benefits the dissolution of Sb, while that of Pb is opposite. In addition, the reduction potential of Sb(III) is more positive than that of Pb(II), which suggests that the separation of Sb from the Pb-containing Sb alloy is feasible. The effects of temperature and current density are discussed during the electrorefining process. The results show that high-purity Sb powders (99.978%) can be obtained at 30 mA cm −2 and 343 K, and that the current efficiency is about 95.42%.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Xin Zhang,Jun Fan,Yue Sun,Yan Liu,Weisheng Zheng
With the rapid development of industrialization, heavy metal pollution has become a major challenge in aquatic environmental management. In this work, a novel gel-type ion exchanger based composite adsorbent (Zr-Fe-Y-001) was prepared with metal resources in zirconium material production wastewater for removal of Pb(Ⅱ) from aqueous solution. Zr-Fe-Y-001 contained sub-5 nm particles that were uniformly confined within the resin micropores, enhancing its Pb(Ⅱ) adsorption capacity substantially, which surpassed previously reported values. Batch experiments demonstrated that the adsorption capacity of Zr-Fe-Y-001 for Pb(Ⅱ) increased with rising pH within a range of 1–6. This capacity remained stable within the pH range of 1–6, and it maintained high selectivity even in the presence of competing ions, such as Ca(Ⅱ) and Mg(Ⅱ). The kinetic data were well described by the pseudo-first-order model, while the adsorption isotherms were dominated by the Langmuir model, yielding a maximum theoretical capacity of 842.07 mg/g at 313 K. The fixed-bed experiment demonstrated that Zr-Fe-Y-001 effectively reduced Pb(Ⅱ) concentration in wastewater to < 10 μg/L, as recommended by the World Health Organization for drinking water. Remarkably, the adsorbent retained over 90 % of its initial capacity after three regeneration cycles, confirming exceptional stability and recyclability. This study provides an effective and sustainable technical solution for the resource utilization of valuable metals in zirconium material production wastewater and the treatment of heavy metal pollution.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yan Liu,Xiangju Mao,Wenshan Ni,Fang Xiao,Lei Fan,Kangkang Wang
Monolithic adsorbents have become promising materials for removing contaminants in wastewater. By combining the macrostructural advantage of monolithic materials with their excellent surface function, these materials offer significant potential for practical applications. This study proposes an efficient and economical preparation method for developing high-performance chitosan-based monolithic adsorbent for Pb 2+ removal. In brief, melamine foam (MF) was pre-modified with polydopamine (PDA), and chitosan (CS) was uniformly loaded onto the modified foam via a “crosslinking-surface deposition” process. The resulting monolithic adsorbent (CS/PDA@MF) exhibited a high adsorption capacity for Pb 2+ (174 mg g −1 ) and achieved equilibrium adsorption time (<120 min) in batch adsorption experiments. The material demonstrated excellent elastic properties, allowing for easy manual collection using tweezers. Six cycles of adsorption/desorption experiments proved satisfying reusability. Additionally, a fixed-bed column was prepared using CS/PDA@MF to investigate the continuous flow adsorption behavior, showing excellent potential for practical applications. The adsorption mechanism was explored by ATR FT-IR and XPS characterization. This study provides a technical foundation for research into high-performance CS-based monolithic adsorbents, which are expected to be promising candidates for environmental remediation.
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高影响因子
RSC Advances
·
2025
·Vol. 15
·期 17
·13728-13743
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IF 4.6
Xueling Liu,Wenjie Ren,Weilin Song,Wanqiang Zhang,Yuhan Wang,Yi Wang,Guozhi Fan,Lei Zhang,Yanjun Huang
Wastewater containing heavy metals and organic dye pollutants discharged into receiving waters poses a serious environmental concern. Herein, a novel EDTA-chitosan/alginate porous composite bead adsorbent (EC–AB) was reported for the simultaneous removal of lead (Pb(II)) and methyl blue (MB) complexes from wastewater. Characterization results showed that EC–AB contained plenty of oxygen/nitrogen functional groups. The effect of CaCO3 addition, pH of the initial solution, contact time, initial pollutant concentration, and ionic strength on EC–AB pollutant removal performance and the adsorption mechanism were systematically analyzed. These findings indicated that EC–AB exhibited high removal efficiency over a wide pH range and at high ionic strength. The maximum adsorption capacities of EC–AB for Pb(II) and MB were 504.11 mg g−1 and 660.76 mg g−1, respectively, at 298 K. Adsorption kinetics and isotherm studies indicated that the adsorption well fitted the pseudo-second-order kinetic model and the Langmuir isotherm. A possible adsorption mechanism involving electrostatic attraction, chelation, ion exchange, H-bonding and synergistic effects was proposed. Moreover, EC–AB showed superior stability and reusability, with removal efficiencies of 76.64% for Pb(II) and 80.29% for MB after five continuous adsorption–desorption cycles for treating complex wastewater. In summary, this work provides a beneficial strategy for designing high-performance adsorbents for the treatment of wastewater.
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Chunjing Shi,Menghang Wang,Zhenyu Zhang,Hongxiu Zhou,Pengfei Hu,Longhua He,Xingzhong Liu,Huaxiang Cai,Zehong Pang
Ceramic dentures differ from those produced by additive manufacturing, and manual polishing is employed for ceramic dentures due to their hard-brittle nature, complex shapes, and thin-walled structures with thicknesses less than 1.0 mm. This presents challenges for the medical and manufacturing industries. To address these challenges, we prepared a novel ternary composite of Fe 3 O 4 @TiO 2 @PB (Prussian blue) to establish a photo-Fenton system. This composite enhances the transport of photogenerated electrons and facilitates the generation of radicals, demonstrating high photocatalytic activity for the polishing and degradation of pollutants without the need for sacrificial agents. Meanwhile, Fe 3 O 4 @TiO 2 @PB was utilized to develop a new photocatalytic magnetorheological polishing slurry. The slurry consisted of sorbitol, hydrogen peroxide, Fe 3 O 4 @TiO 2 @PB, and ceria (0.025 wt. %). After polishing, the surface roughness (Sa) decreased from 5.538 to 0.081 μm, representing a reduction of 98.54 % compared to the pristine surface. Due to photogenerated hydroxyl radicals, the Si-OH and Li-OH bonds can be created on the surface of the ceramic dentures, facilitating defects removal. Before and after polishing, the ceramic dentures enhanced the inhibition rates of Escherichia coli and Staphylococcus aureus from 50 % to 74 % and from 49 % to 80 % over the course of one day, respectively. Through irradiation with simulated sunlight, Fe 3 O 4 @TiO 2 @PB generates electrons, holes, and hydroxyl radicals, leading to the degradation of amoxicillin (AMOX) and polysorbate (PS20) by up to 99 % within 60 min. Additionally, Fe 3 O 4 @TiO 2 @PB was successfully separated and reused from the developed slurry. Therefore, the designed and developed novel ternary composite, Fe 3 O 4 @TiO 2 @PB, achieves photocatalysis, photodegradation, and recycling, offering new solutions for the medical, manufacturing, and environmental industries.
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高影响因子
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.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2017
·
IF 4.784
Fei Wu,Linna Zhu
In this work, lead chloride (PbCl 2 ) and lead acetate trihydrate (Pb(Ac) 2 ·3H 2 O) mixed precursors are introduced to prepare perovskite films. PbCl 2 has been reported to enhance crystallinity but long annealing time is required. Pb(Ac) 2 ·3H 2 O is used because it is cheap and easy to get, and lead acetate offers fast crystallization process , meanwhile the trihydrate might improve the film stability. With an optimal blending ratio of the two precursors (1:1 mol ratio), compact and full-coverage perovskite film with large grain sizes (>1 µm) are obtained, and the speed of perovskite film formation is greatly accelerated. Moreover, the film prepared in a 1:1 mol ratio of the two precursors exhibits good moisture liability for several days under around 70% RH environment. As a result, the PbCl 2 : Pb(Ac) 2 ·3H 2 O (1:1) results in the highest efficiency of 14.77%. The findings in this work provide a facile way to improve the perovskite film quality and stability.
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高影响因子
危险品化学品经营许可证（带存储）