INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Xiuxian Zhao,Heng Zhao,Anna Mei,Lin Peng,Junhua Sun
Green and high-performance biomass-based adsorbents have a good application prospect for the removal of heavy metals. At present, the preparation of chitosan/lignin biomass adsorbents mainly adopts dissolution-drying method, and the obtained adsorbents show relatively poor adsorption performance for heavy metals. To overcome this problem, a novel chitosan/lignin hydrogel (CSL) is prepared by a simple one-pot method through the Mannich reaction. Research findings show that the hydrogels present higher adsorption selectivity for Pb(II) and Cu(II) than other common heavy metals. Among them, the optimal hydrogel CSL1 shows unexpectedly ultrafast adsorption rate for Pb(II) and Cu(II) with equilibrium time of only 1 min and 2 min. Meanwhile, the maximum adsorption capacities of CSL1 for Pb(II) and Cu(II) are 139.86 and 98.71 mg·g −1 , respectively. Compared with the reported adsorption materials related to chitosan or lignin, the CSL1 has the advantages of simple preparation process, considerable adsorption capacity, and short adsorption equilibrium time. Moreover, the adsorption mechanism is investigated by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), and the results prove that the adsorption mechanism is chemical complexation. This work not only contributes to the advancement of hydrogel-based adsorbents, but also holds significant industrial potential for addressing water pollution issues and promoting sustainable development.
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PubMed
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 19
·1579
·
IF 4.4
Liying Jiang,Dongyang Li,Mingxing Su,Yirong Qiu,Fenghua Chen,Xiaomei Qin,Lan Wang,Yanghai Gui,Jianbo Zhao,Huishi Guo,Xiaoyun Qin,Zhen Zhang
Cardiac troponin I (cTnI) monitoring is of great value in the clinical diagnosis of acute myocardial infarction (AMI). In this paper, a highly sensitive electrochemical aptamer sensor using polystyrene (PS) microspheres as the electrode substrate material in combination with Prussian blue (PB) and gold nanoparticles (AuNPs) was demonstrated for the sensitive and label-free determination of cTnI. PS microspheres were synthesized by emulsion polymerization and then dropped onto the glassy carbon electrode (GCE); PB and AuNPs were electrodeposited on the electrode in corresponding electrolyte solutions step by step. The PS microsphere substrate provided a large surface area for the loading mass of the biological affinity aptamers, while the PB layer improved the electrical conductivity of the modified electrode, and the electroactive AuNPs exhibited excellent catalytic performance for the subsequent electrochemical measurements. In view of the above mentioned AuNPs/PB/PS/GCE sensing platform, the fabricated label-free electrochemical aptamer sensor exhibited a wide detection range of 10 fg/mL~1.0 μg/mL and a low detection limit of 2.03 fg/mL under the optimal conditions. Furthermore, this biosensor provided an effective detection platform for the analysis of cTnI in serum samples. The introduction of this sensitive electrochemical aptamer sensor provides a reference for clinically sensitive detection of cTnI.
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PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2017
·
IF 3.012
Hai-Yan Song,Tian-Fang Kang,Meng-Fan Jiang,Jing-Jing Zhang,Shui-Yuan Cheng
A novel, simple, and versatile electrochemiluminescence (ECL) sensing platform for Pb(II) ions was developed based on DNAzyme with peroxidase-like activity to catalyze the reduction of hydrogen peroxide. Poly (diallyldimethylammonium chloride) (PDDA) with positive charge was adsorbed onto the surface of graphene oxide (GO) and then CdS quantum dots (QDs) with negative charge were enriched to the surface of GO by electrostatic interaction between CdS QDs and PDDA to prepare a composite (denoted as [email protected] ) which was immobilized on the surface of a glassy carbon electrode (GCE). When hydrogen peroxide was used as coreactant CdS QDs can produce ECL signal. G-rich DNA strand, i . e . T30695, can combine with Pb (II) ions to form a stable parallel G-quadruplex. The G-quadruplex can further combine with hemin to form DNAzyme which have catalysis towards the reduction of hydrogen peroxide causing the decrease of ECL signal. Amino-modified T30695 was attached to [email protected] composite by the reaction between the amino group of T30695 and carboxyl group of CdS QDs. The ECL signal of the biosensor was linearly dependent on the logarithm of Pb(II) concentration from 1.0 × 10 − 14 to 1.0 × 10 − 11 M with a detection limit of 9 fM. An excellent performance of ECL biosensor indicated that it is promising for Pb(II) detection in real samples.
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高影响因子
DESALINATION
·
2024
·
IF 8.3
Kegui Zhang,Xin Liu,Lichao Tan,Keke Xu,Wenming Pei,Fukai Tang,Tong Wei,Jiqiang Jia,Bin Xu,Juying Li,Xinsheng Zhu,Feng Ge
In this work, an energy-efficient capacitive deionization (EACDI) system with energy-recovery and enhanced adsorption capacity was firstly built by using metallocene-doped MoS 2 /CNT (mFc@MoS 2 /CNT). The structures and morphologies of the porous materials including single walled carbon nanotube (SWCNT), MoS 2 /CNT and mFc@MoS 2 /CNT were investigated by transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray diffractometer (XRD), Raman spectra and N 2 adsorption-desorption tests, and the performance of EACDI system on the removal of Pb 2+ and Cd 2+ were evaluated by electrosorption tests. The results suggest that this EACDI system shows higher adsorption capacity on the removal of heavy metal ions at the concentration level of mg/L, with respect to traditional capacitive deionization (CDI). Moreover, this new method shows good selectivity and high energy effectiveness on the separation of trace Pb 2+ with the adsorption efficiency of 96 % at 10 μg/L level and an energy consumption of 0.98 kJ/m 3 with 24.2 % energy recovery. As a result, this research reveals an advanced electrosorption method to purify the drinking water polluted by trace heavy metals with the advantage of low cost and high energy efficiency.
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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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
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
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
·
2025
·Vol. 40
·期 9
·095015
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IF 2.1
Xinyan Han,Xinjie Wang,Zhichao Zhang,Zhen Sun,Zhixin Jin
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), an ordinary hole transport layer (HTL), has inherent shortcomings that restrict its use in Sn–Pb perovskite solar cells (PSCs). In this study, PEDOT:PSS was mixed with ethanol using a simple solution method, resulting in enhanced conductivity and an optimized work function. By varying the concentration of ethanol doping, the insulated PSS shell surrounding the PEDOT:PSS was stripped, and the conductivity of PEDOT:PSS was increased from 4.50 × 10−4 S cm−1 to 7.00 × 10−4 S cm−1. The work function was lowered by 0.23 eV to −5.30 eV, bringing it closer to the energy level of Sn–Pb perovskite. Ethanol-doped PEDOT:PSS was utilized as the HTL in Sn–Pb PSCs based on FA0.5MA0.5Sn0.5Pb0.5I3, resulting in 18.10% photoelectric conversion efficiency with negligible hysteresis, and more than 40% performance improvement compared to the undoped devices. Furthermore, the treatment of ethanol could enhance the stability of the devices. The doped device was placed in a glove box for one month, and its efficiency remained above 90% of the maximum value. Thus, ethanol doping in PEDOT:PSS should provide a promising strategy for developing HTLs in efficient Sn–Pb PSCs.
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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
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
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
MATERIALS CHEMISTRY AND PHYSICS
·
2020
·
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
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
JOM
·
2022
·Vol. 74
·期 3
·915-923
·
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
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