JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Xin Liu,Qing Wang,Zhuanxia Zhang,Liangchun Jia,Zhenxing Shen,Tengwen Long,George Zheng Chen,Jun He,Xin Song
The co-mingled plumes of chloroethenes and per- and polyfluoroalkyl substances (PFASs) raise a major challenge for groundwater remediation. This study is the first try to apply sulfidated nano zero-valent iron supported on calcined layered double oxides (S-nZVI@LDO) for simultaneous removal of trichloroethylene (TCE) and perfluorooctanoic acid (PFOA). Our findings revealed that 2 g/L S-nZVI@LDO simultaneously removed 73.3 % TCE and 37.8 % PFOA in pure water, with 49.5 % TCE degraded to less chlorinated products and 23.8 % adsorbed or unquantified transformation of C 3 –C 6 hydrocarbons. Comparative experiments using individual and co-occurring TCE and PFOA revealed that co-existing PFOA and TCE minimally affected their respective removal efficiencies, highlighting S-nZVI@LDO’s suitability for co-contaminant remediation. Furthermore, S-nZVI@LDO achieved optimal TCE and PFOA removal under acidic conditions, surpassing non-composite S-nZVI and LDO. Based on the characterization of S-nZVI@LDO, TCE removal involved reductive dechlorination and sorption via hydrophobic interactions, while PFOA removal was primarily driven by electrostatic interactions and hydrogen bonding. In real groundwater, S-nZVI@LDO achieved 58.2 % TCE and 33.7 % PFOA removal. Additionally, S-nZVI@LDO simultaneously removed nine different PFASs from a 12-PFASs mixture and demonstrated greater effectiveness for long-chain PFASs and their alternatives (e.g., GenX) owing to their hydrophobic nature. These findings highlight the potential of S-nZVI@LDO as an effective material for TCE-PFOA co-contaminated groundwater.
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PubMed
高影响因子
ChemSusChem
·
2019
·Vol. 12
·期 14
·3390-3400
·
IF 7.804
Nan Jia,Jing Liu,Yunshan Gao,Pei Chen,Xinbing Chen,Zhongwei An,Xifei Li,Yu Chen
Graphical Bifunctional electrocatalyst : A nanocomposite with graphene-encapsulated Co 9 S 8 nanoparticles loaded on N,S-codoped carbon nanotubes is fabricated as a highly efficient and stable bifunctional electrocatalyst for the oxygen reduction and evolution reactions. It can be used as the air electrode in the rechargeable Zn–air battery. An inexpensive and efficient bifunctional electrocatalyst for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is central to the rechargeable zinc–air battery. Herein, a nanohybrid, in which N,S-codoped carbon nanotubes were decorated with Co 9 S 8 nanoparticles encapsulated in porous graphene layers, was fabricated by a one-step heat-treatment process. The N,S dopant species were the major active sites for the ORR, and Co 9 S 8 nanoparticles were mainly responsible for the OER. Compared with commercial 20 wt % Pt/C and Ir/C electrocatalysts, this nanohybrid exhibited a comparable ORR half-wave potential (0.831 V vs. reversible hydrogen electrode) and OER potential (1.591 V at 10 mA cm −2 ), better long-term stability in an alkaline medium, and a narrower potential gap (0.76 V) between ORR and OER. Furthermore, as air electrode of the rechargeable zinc–air battery, it delivered a low charge–discharge voltage gap (0.65 V at 5 mA cm −2 ), high open-circuit potential (1.539 V), good specific capacity (805 mA h g at 5 mA cm −2 ), and excellent cycling stability (48 h), superior to those of commercial Pt/C and Ir/C catalysts, and thus showed promise for applications in renewable energy conversion devices.
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PubMed
高影响因子
Journal of Superconductivity and Novel Magnetism
·
2025
·Vol. 38
·期 2
·112
·
IF 1.7
Li Xiaofeng,Gao Yuxia,Tian Zhaoming,Ren Weijie,Sun Xin,Wang Mingli
KNi(PO 3 ) 3 was successfully synthesized by solid-state method and the magnetic properties were characterized. The crystal structure of KNi(PO 3 ) 3 belongs to trigonal crystal system with space group R 3, where Ni 2+ ions form the distorted honeycomb-lattice within the ab-plane stacking in the “ABAB” type fashion along the c -axis. Magnetization measurements reveal the presence of antiferromagnetic (AFM) interaction with Curie Weiss (CW) temperature θ CW = − 12.905 K but without long-range magnetic order down to 2 K. Notably, the CW fitted effective moment µ eff = 3.35µ B and saturated magnetization M S = 2 μ B /Ni 2+ at 2 K support KNi(PO 3 ) 3 as an S = 1 spin system. Intriguingly, the zero-field specific heat exhibits a broad peak maximized at ~ 2.5 K indicating the onset of short-range spin correlation between Ni 2+ ions, while the integrated magnetic entropy ( S mag ) is close to the expected Rln3 for S = 1 system, indicative of large spin fluctuation below 2 K driven by spin frustration.
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高影响因子
LUMINESCENCE
·
2025
·Vol. 40
·期 11
·e70357
·
IF 3
Li Li,Yulu Xia,Ming Zhang
Carbon nanoparticles (CNPs) integrated with nanomaterial-based quenchers have emerged as an innovative platform for developing advanced sensing systems. In this study, we developed a novel fluorescent sensing platform for the highly sensitive detection of hydroxylamine (HA). Through a one-step hydrothermal synthesis approach, nitrogen and sulfur co-doped carbon nanoparticles (N,S-CNPs) were successfully prepared using dimethylamine hydrochloride and dimethyl sulfoxide (DMSO) as precursors. The synthesized N,S-CNPs demonstrated exceptional fluorescence properties, achieving a remarkably high quantum yield of 50%, along with outstanding water solubility, photostability, and chemical stability. The fluorescence emission of N,S-CNPs could be effectively quenched by manganese dioxide (MnO 2 ) nanosheets through a combined mechanism of inner filter effect (IFE) and static quenching effect (SQE). Notably, HA induced the redox-mediated decomposition of MnO 2 nanosheets, converting MnO 2 to Mn 2+ ions and consequently restoring the fluorescence of N,S-CNPs (turn-on response). Under optimized conditions, the proposed sensor exhibited a wide linear detection range (0.1–200 μM) with an ultra-low detection limit of 0.04 μM. The sensor demonstrated excellent analytical performance in real-world applications, successfully detecting HA in lake and river water samples with high accuracy and reliability. These findings highlight the great potential of this fluorescent sensing platform for environmental monitoring and water quality assessment.
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高影响因子
Synthetic and Systems Biotechnology
·
2025
·
IF 4.4
Yue Chen,Linbo Gou,Di Liu,Shengfang Wu,Xiuwen Zhou,Tai-Ping Fan,Long Wang,Yujie Cai
(S)-(+)-linalool, a valuable acyclic monoterpenol secondary metabolite of plants, finds extensive applications in the food, flavor and fragrance, pharmaceutical, and daily chemical industries. Microbial synthesis offers two pathways for its production, among which the mevalonate (MVA) pathway derived from halophilic archaea is more widely employed. However, the traditional Haloarchaea-type MVA pathway relies on bifunctional enzyme catalysis, consuming 3 molecules of ATP. Moreover, the catalytic activity of natural linalool synthase (LIS) is generally low, failing to meet industrial requirements. Additionally, linalool exhibits significant toxicity to microbial hosts, thereby limiting the production capacity of conventional chassis microorganisms. To address these bottlenecks, this study implemented systematic optimizations: Firstly, the Archaeal mevalonate pathway was reconstructed by replacing the original bifunctional enzyme with two monofunctional enzymes, successfully reducing ATP consumption to 2 molecules. Secondly, through directed screening and rational design, a high-activity linalool synthase mutant, CsMLIS I331V/I444L , derived from Coriandrum sativum , was obtained. Furthermore, an enzyme fusion strategy was adopted, involving the introduction of a long flexible linker between key genes, which significantly enhanced catalytic efficiency. Finally, S . marcescens HBQA7Δ sIaAB-pyc , a strain previously screened in our laboratory with broad-spectrum tolerance to terpenoids, was selected as the novel chassis cell. Collectively, these efforts resulted in the construction of a microbial cell factory for the efficient synthesis of (S)-(+)-linalool, laying a solid foundation for industrial-scale production.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Jianying Huang,Yuhong Liu,Lijun Yang,Fengyan Zhou
A sulfonated chitosan (SCS) was prepared via nucleophilic substitution and characterized by Fourier transform infrared spectroscopy, 1 H and 13 C NMR spectra, gel permeation chromatography, elemental analysis, and thermo gravimetric analysis. The inhibition activities of bacterial adhesion and biofilm formation against E. coli and S. aureus of SCS were assessed in comparison with those of unmodified chitosan hydrochloride (WCS) which was commercially available. The metabolic activity and secretion of exopolysaccharide in biofilms of E. coli and S. aureus were significantly decreased after the treatment of SCS. Scanning electron microscopy and confocal laser scanning microscopy also demonstrated that SCS and WCS at 1MIC concentrations could obviously inhibit the formation of biofilm. Upon the experimental data obtained, it can be concluded that the alkylsulfonation of chitosan could significantly improve efficacy in killing biofilm-embedded bacteria, and the inhibition activities against biofilm formation of E. coli and S. aureus . The exploitation of SCS in this study is helpful to extend the understanding to an alternative to antibiotics and chemical preservatives in food and medicine fields.
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高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Xuejun Xu,Rutao Meng,Yue Liu,Han Xu,Jianpeng Li,Yi Zhang
Solution-processed chalcopyrite solar cells are widely regarded as a promising alternative method in reducing the cost compared with vacuum-based techniques. It is noted that the absorber layer usually needs to be prepared under a high insert pressure (∼1.6 atm) to suppress element loss or under a mild pressure but additional surface etching is needed for fabricating high efficient solar cell. Herein, a copper gradient structured precursor is proposed to prepare CuIn(S,Se) 2 (CISSe) film under a mild pressure (1.1 atm). The designed gradient Cu not only promotes crystal grain growth and tailors the defects, but also avoids the surface etching of the formed CISSe film for the fabrication of high efficient solar cells. Further, Cu gradient design decreases the conduction band offset of heterojunction, boosting the carriers transport across the p-n heterojunction. Accordingly, a 13.35% efficient CISSe solar cell, comparable to the high efficient CISSe solar cell prepared by this method under high pressure or with film surface etching, is fabricated. This work provides a facile pathway to fabricate high efficient solution-processed chalcopyrite solar cell, avoiding high selenization pressure and film etching, and shows huge potential for solution-processed copper-based solar cells.
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yang Liu,Yuanyuan Wang,Jie Ma,Runping Han
ABSTRACT In this study, peanut shell was modified using β-cyclodextrin (β-CD) and citric acid to improve the adsorption capacity for removal of lead ion (Pb 2+ ) and bisphenol S (BPS) from solution in batch mode. Scanning electron microscopy, Fourier-transform infrared spectroscopy, elemental analysis, X-ray fluorescence analysis, specific surface area analysis, thermogravimetric analysis, etc were used to characterize the adsorbent before and after modification. The results showed that the adsorbent was successfully modified. The adsorption results of Pb 2+ and BPS on β-CD-PS indicated that acidic conditions were not conducive to the adsorption of Pb 2+ , the adsorption of BPS basically remained unchanged at pH 2~7, and alkaline conditions were not conducive to the adsorption. The presence of salt had a negative effect on Pb 2+ , but had no effect on the adsorption of BPS. The Langmuir and Koble–Corrigan models could predict the equilibrium adsorption process of Pb 2+ while Temkin and Koble–Corrigan models could describe the equilibrium adsorption process of BPS. The adsorption quantity from experiments is 89.6 mg·g –1 for Pb 2+ and 16.2 mg·g –1 for BPS at 293 K, respectively. The adsorption process of Pb 2+ was consistent with the pseudo-first-order and Elovich models, indicating the presence of ion-exchange in the adsorption process; the adsorption of BPS was consistent with the pseudo-second-order model, indicating that chemisorption was the main rate-controlling step. Thermodynamic studies indicated that the adsorption of Pb 2+ was a spontaneous and endothermic reaction with increasing entropy, while the adsorption of BPS was a spontaneous and exothermic reaction with decreasing entropy. 0.1 mol·L –1 HNO 3 could desorb and regenerate the β-CD-PS adsorbed Pb 2+ for three times, and 75% C 2 H 5 OH had a better desorption and regeneration effect for BPS loaded β-CD-PS. β-CD-PS can effectively remove the lead ion and BPS from mixtures and the study can provide the basis for the effective utilization of peanut shell in environmental remediation.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Shuhan Jiang,Yujie Jia,Xiaoxia Yang,Qianchen Ou,Yanan Liu,Siqian Zhang,Dianwu Huang,Hongmei Wang
FeCo-LDH/g-C 3 N 4 S-type heterojunction photocatalysts were successfully prepared by thermal polymerization and electrostatic self-assembly methods. The structure, morphology, light absorption and photoelectrochemical properties of the prepared samples were characterized. The photocatalytic properties of the photocatalysts were evaluated by the degradation of tetracycline (TC) and photocatalytic hydrogen evolution from water splitting under visible light irradiation. The experimental results showed that the photocatalytic properties of FeCo-LDH/g-C 3 N 4 nanocomposites were superior to those of pristine g-C 3 N 4 . In addition, when the mass ratio of FeCo-LDH to g-C 3 N 4 was 7:100, the photocatalytic performance of the as-prepared FeCo-LDH(7 %)/g-C 3 N 4 is the optimal. The TC degradation rate of FeCo-LDH(7 %)/g-C 3 N 4 reached 78.0 % within 120 min, which was 2.63 times of that of pure g-C 3 N 4 . And the photocatalytic hydrogen evolution of FeCo-LDH(7 %)/g-C 3 N 4 was 107.28 μmol for 4 h, which was 12.68 times that of g-C 3 N 4 . The results showed that the as-prepared FeCo-LDH/g-C 3 N 4 nanocomposite photocatalysts have excellent performance in the degradation of TC and the photocatalytic H 2 evolution. Meanwhile, the EPR and trapping experiments revealed that OH and O 2 − played a main role in the photocatalytic TC degradation. The mechanism of photocatalytic TC degradation and hydrogen production of FeCo-LDH/g-C 3 N 4 nanocomposite photocatalysts was also discussed.
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高影响因子
Materials Today Energy
·
2022
·
IF 9.257
ZhiLong Han,Han Zhang,Qiang Wu,ShuPing Li,Wei Zhong,RenJie He,ShiJie Cheng,Jia Xie
Silicon-sulfur (Si-S) full cells show significant potential in energy storage due to their high theoretical energy density compared to commercial lithium-ion batteries. Nevertheless, a majority of electrolytes reported for Si-S full cells still cannot meet the requirements of stable long-duration cycling. Herein, we report a high-areal-capacity Si-S full cell consisted with prelithiated SiO, thick Li 2 S-Se 0.05 S 0.95 @pPAN electrode and a trifluorobenzene (F 3 B) modified and diluted high-concentration electrolytes. This novel electrolyte can effectively mitigate the volume expansion of the prelithiated SiO anode and enhance the utilization of active S in the cathode, showing excellent compatibility with electrodes. The assembled Si-S full cell using modified electrolyte displays remarkable cyclability over 100 cycles at 0.1C, exhibiting higher capacity retention (54.0% vs . 17.5%) than the pristine electrolyte without F 3 B. More importantly, a full cell with a thick sulfur cathode (16 mg/cm 2 ) exhibits a superior initial areal capacity of 8.34 mAh/cm 2 and high-capacity retention of 52% after 80 cycles, even at a lean electrolyte condition (2 μL/mg). This work provides guidance for the achievement of high-performance Si-S full cells under lean electrolytes.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yafei Sang,Jianhan Huang
Porous materials with high Brunauer-Emmett-Teller (BET) surface area ( S BET ) and abundant ionic active sites facilitate efficient CO 2 capture and conversion. Herein, a kind of novel benzimidazole-based hyper-cross-linked poly(ionic liquid)s (HPILs) were developed via the hyper-cross-linking strategy and the as-prepared HPILs possessed high S BET (485–780 m 2 /g), plentiful micro/mesoporosity, and abundant ionic active sites. The HPILs showed noteworthy CO 2 uptake (79–143 mg/g at 273 K and 1.0 bar), moderate isosteric heats (32–45 kJ/mol), and acceptable CO 2 /N 2 selectivity (IAST: 23–46). Intriguingly, HPILs-Cl-2 exhibited excellent catalytic activity for CO 2 cycloaddition and 99% of propylene oxide was successfully converted to cyclic carbonates under mild conditions (70 °C, 0.1 MPa CO 2 , 9 h). This synthetic strategy is of great importance for the functionalized hyper-cross-linked polymers and the synthesized HPILs are promising for efficient CO 2 capture and conversion under mild conditions.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 49
·期 1
·132-140
·
IF 2.7
Rumeng Feng,Lu Chen,Liping Huang,Haihong Wu,Yuanyu Ge,Jiani Xu,Min Zeng,Wenyao Li
The synergistic effect between the transition metal sulfide alloy core, the N-doped graphene shell, and the internal interfacial potential serves to regulate the electronic structure and facilitate electron transfer. We used Fe-based Prussian blue analogues as a single precursor to prepare a N-doped graphene-coated metal core–shell structure (FeNi@NG) through hydrothermal and high-temperature solid phase reactions. The S source was then introduced and annealed, yielding a S, N co-doped graphene-encapsulated metal core–shell structure (FeNi–S@NG). Finally, a nitrogen-doped graphene-coated metal core–shell structure with S defects (S–FeNi@NG) was obtained through NaBH4 liquid-phase reduction. The synergistic effect between the transition metal sulfide alloy core and the N-doped graphene shell, in conjunction with the internal interfacial potential regulate the electronic structure and facilitate electron transfer. Numerous sulfur vacancies accelerate electron transfer and enhance OER catalytic performance. The optimized material, S–FeNi@NG, exhibited excellent OER catalytic performance, with an overpotential of 250 mV (at 10 mA cm−2) and a Tafel slope of 90.95 mV dec−1 in an alkaline electrolyte.
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