Journal of Materials Chemistry A
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2024
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IF 10.7
Tingli Ren,Yuanfeng Liu,Xiaoqiu Lin,Congju Li
Microbial fuel cells (MFCs) demonstrate significant potential as renewable energy devices due to their ability to harvest electrical energy from wastewater. However, sluggish extracellular electron transfer (EET) efficiency and poor biofilm colonization on the anode interface greatly restrict the power generation of MFCs. Anchoring efficient anode electrocatalysts over the anode surface has been proven to be a powerful strategy to enhance the overall performance of MFCs. Herein, anode electrocatalysts comprising carbon nanofibers in situ-doped with Fe/Fe3C nanoparticles and reduced graphene oxide (rGO/NCNFs@Fe/Fe3C) were fabricated through electrospinning, carbonization, and freeze-drying methods, based on the following considerations: (i) the excellent electrocatalytic properties and biocompatibility of Fe3C; (ii) the formation of abundant reactive sites (such as Fe–N) on the surface of carbon nanofibers induced by the doping of N and Fe elements; (iii) the aerogel structure with a huge specific surface area and excellent electrochemical properties. Therefore, an MFC with an rGO/NCNFs@Fe/Fe3C-modified anode achieved a maximum power density of 2318 mW m−2 and a maximum output voltage of approximately 0.64 V, which was significantly superior to that of the pristine carbon cloth anode. This work provides a novel strategy to improve biofilm colonization and EET, thus promoting the power generation of MFCs.
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Journal of Materials Chemistry C
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2024
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IF 5.7
Xiaomeng Sun,Xinfeng Cheng,Xiya Chen,Hongwei Wang,Qian Zhao,Chunxia Yang,Xianchao Du,Xiaojing Xing,Dongfang Qiu
A novel three-arm terpyridine ligand L with flexible methylenoxyl (–CH2–O–) groups was synthesized by a one-step chemical reaction, and the uniform two-dimensional supramolecular films with various sizes and thicknesses were simply prepared on the surface of indium tin oxide (ITO) conductive glass by an Fe2+-induced self-assembly method at the dichloromethane–water interface. The morphology, structure and composition were confirmed by ultraviolet-visible (UV-vis) absorption spectroscopy, scanning electron microscope/energy dispersive spectrometer (SEM/EDS), Fourier transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS), respectively. The sandwiched solid-state devices (1.3 × 1.4 cm2), fabricated by employing L-Fe film coated ITO as the electrochromic layer and LiClO4/poly(methyl methacrylate) (PMMA)/propylene carbonate (PC)/CH3CN based gel as the supporting electrolyte, showed a reversible color change from purple to light yellow with the optical contrast (ΔT%) of 56.6%, the coloring and bleaching times of 3.9 s and 3.7 s, and the coloring and bleaching efficiencies of 875.2 cm2 C−1 and 182.3 cm2 C−1 under the applied double-step voltages of −2.0 V and +3.0 V. The device had good stability, maintaining 70% of its initial optical contrast after 500 cycles. Meanwhile, a large-sized solid-state device with an active area of 7 × 7 cm2 showed its application potential in smart windows or displays.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Daibing Hou,Xuedan Cui,Yiming Tang,Meng Liu,Hantong Qie,Pengjie Zhao,Wenpeng Leng,Nan Luo,Huilong Luo,Wenxia Wei,Aijun Lin,Tianwen Zheng
Rebounding and lagging during the process of remediating contaminated sites are challenging problems. A potential solution is developing slow-release materials that could assist in the long-term remediation of contaminated sites. This study synthesised a slow-release Fe-C composite (CSBC-nZVI@β-CD), which exhibits a synergistic effect of encapsulated layers and nanocracks, using a liquid-phase reduction method. Furthermore, the reduction and dechlorination mechanism of trichloroethene (TCE) was systematically investigated. The introduction of β-cyclodextrin (β-CD) intensified the Kirkendall effect, forming nano zero-valent iron (nZVI) with abundant radial nanocracks and a litchi-like appearance on the biochar surface. Additionally, β-CD created an encapsulation layer measuring 5–7 nm on the surface of nZVI, improving its electron transport capacity and hydrophobic properties. The CSBC-nZVI@β-CD nanocomposite successfully removed 99 % of TCE in solution within 2 h and accomplished a degradation efficiency of 98.9 % within 15 d. The synergistic effect of the β-CD encapsulating layer and nanocracks facilitated the reactivity and electron-retarding capacity, resulting in a broad pH tolerance and anti-interference ability. Density-functional theory (DFT) calculations and experimental methods were used to study the mechanism of TCE reduction dechlorination; the unique structure of β-CD tended to bind with Fe as well as adsorb TCE, thereby facilitating electron transfer and the enrichment of TCE at the reaction interface. In addition, the sustained-release Fe-C composites reduced the bonding energy required during the TCE degradation reaction and promoted the complete reaction of the product. Overall, CSBC-nZVI@β-CD exhibited significant potential for the long-term remediation of groundwater.
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INORGANIC CHEMISTRY
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2024
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IF 4.3
Tianhao Yu,Peng Gao,Yu Wang,Maidina Muhetaer,Hong Du
In response to the limitations of slow reaction kinetics and elevated overpotentials in the OER, a novel core–shell structured electrocatalyst, termed NiCo–ZIF-67@Fe–Co–Ni-PBA or NiCo–ZIF@PBA, has been developed. This material demonstrates exceptional catalytic performance, exhibiting a minimal overpotential of approximately 188 mV at 10 mA cm–2, alongside a Tafel slope of 109 mV dec–1. Its robust stability in a 1 M KOH solution during the OER operations is noteworthy. Theoretical insights from DFT calculations reveal that a Co–O–Fe bridging configuration within NiCo–ZIF@PBA lowers the energy barrier for the reaction to 1.79 eV, a significant reduction from 2.67 eV observed with NiCo–ZIF-67. The improvement in electrochemical performance is primarily due to the emergence of Co3+ ions, which results from the efficient charge transfer occurring at the interface of the PBA and NiCo–ZIF core–shell structure. These findings suggest a promising strategy for designing advanced core–shell materials for electrocatalytic applications.
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PubMed
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Linlin Zheng,Xuechuan Lv,Yanan Chen,Bingyu Wei,Wanqing Hao,Ziyi Zhang,Jingru Yang,Ruiyu Liu,Xu Zhu,Yanli Zhou,Maotian Xu,Xiaohan Gao,Hui Dong
The iron-based metal–organic framework (NH2-MIL-101(Fe)) nanoparticles exhibited excellent conductivity, exceptional catalytic effect, sturdy stability flexible structure, etc. Consequently, it has been exploited in various applications. Herein, NH2-MIL-101(Fe) nanoparticles were successfully synthesized via the hydrothermal method and were grown in situ onto the pencil core electrode (PCE) for simultaneous determination of caffeic acid (CA) and acetaminophen (AP). The PCE decorated by NH2-MIL-101(Fe) as electrode substrate, combined with the dual effects of the excellent electrocatalytic activity of NH2-MIL-101(Fe) and the commendable electrical conductivity of PCE, the constructed sensor exhibits superior electrochemical sensing activity. The electrochemical behavior of CA and AP at the electrodes were investigated mainly by differential pulse voltammetry (DPV) and cyclic voltammetry (CV), exhibiting broad linear responses from 0.1 to 500 μM, and 0.08 to 800 μM for simultaneous detection of CA and AP, with detection limits of 29 nM and 24 nM, respectively. Moreover, the results of CA and AP in drug and human urine using this sensor were satisfactory, which proved that the sensor is feasible to simultaneously detect CA and AP.
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Journal of Water Process Engineering
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2024
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IF 6.3
Shenbao Qu,Wenpei Guo,HongDi Mou,Ruyi Wang,Man Wei,Xia Hu
Phthalates (PAEs) are frequently detected in the water environment and pose a severe threat to the ecosystem and human health. Electro-Fenton technology is regarded as an effective approach to degrade PAEs; however, the preparation of inexpensive and efficient cathode materials has restricted its further application. In this study, Fe/Co bimetallic sites were incorporated into solid waste wine lees to synthesize highly active heterogeneous catalyst, and dimethyl phthalate (DMP) was chosen as the target pollutant to investigate the activity of the catalyst. Both the degradation of DMP and the removal of total organic carbon (TOC), the performance of Fe/Co co-modified biochar (FeCo@NOPC) is superior to that of Fe (Co) alone (Fe@NOPC/Co@NOPC) and modified biochar (NOPC). Under neutral conditions. Within 5 h, the DMP removal rate reached 89 % and TOC was reduced by approximately 40 %. The mechanism study reveals that the degradation of DMP is mainly attributed to the OH generated by the cathode, and the anodic oxidation and cathode adsorption only play minor roles. Finally, the degradation path of DMP was analyzed by LC-MS technique. This study offers a novel way to utilize solid waste and reduce the cost of heterogeneous electro-Fenton system.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2024
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IF 2.5
Li Liu,Jingshuai Wang,Xingyi Wu,Hui Kong,Rui Wang,Zhaoyang Wu
Herein, the composite powder with a core–shell heterostructure (Fe–Si–Cr magnetic particles as the core and ZnSO 4 as the shell) was synthesized using hydrothermal method, and Fe–Si–Cr-based soft magnetic composites (SMCs) with an insulation layer of ZnO·SiO 2 ·Cr 2 O 3 (ZSC) composites were successfully prepared via powder heat treatment and cold pressing. The formation mechanism of the ZSC composite insulation layer was thoroughly investigated, and the impact of varying amounts of ZnSO 4 on the Fe-Si-Cr/ZSC SMCs’ microstructure and magnetic properties was analyzed. ZnSO 4 released oxygen during thermal decomposition and oxidation reaction occurred at the core–shell heterogeneous interface, forming ZSC composite insulation layer. The incorporation of ZnSO 4 significantly influenced the homogeneity and thickness of the composite insulation layer, effectively modulating the magnetic properties of Fe–Si–Cr/ZSC SMCs. This SMCs had the best magnetic properties after the addition of 2 wt% ZnSO 4 . Under 10 mT and 300 kHz, the relative permeability was 37.7, with a total loss of 248.8 kW/m 3 The method proposed in this study is beneficial for facilitating the advancement of SMCs towards high frequency and further optimizing its performance.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Huayu Wang,Yanhua Cao,Changsheng Guo,Ming Ge
Heterogeneous catalyst/persulfate advanced oxidation process has been widely used in antibiotic wastewater treatment . As-designed MIL-88A(Fe)/g-C 3 N 4 composite catalyst firstly activated peroxydisulfate (PDS) to degrade tetracycline (TC) in this work. Activating PDS by MIL-88A(Fe)/g-C 3 N 4 has a higher efficiency and rate toward TC degradation compared with MIL-88A(Fe) and g-C 3 N 4 . After 60 min, the optimal MIL-88A(Fe)/g-C 3 N 4 -5 activated PDS to degrade about 80% of TC in water. The existence of g-C 3 N 4 increases the specific surface area and active Fe 2+ content of MIL-88(Fe), promotes PDS adsorption and utilization, thus showing an excellent catalytic performance for PDS activation. MIL-88A(Fe)/g-C 3 N 4 activated PDS oxidation process synergistically removed TC by free radicals (O 2 •− , •OH and SO 4 •− ) with non-free radicals ( 1 O 2 ), and the effect of some important operating factors on TC removal, the TC degradation pathways and toxicity of TC intermediates were analyzed. Moreover, the MIL-88A(Fe)/g-C 3 N 4 -5 powdered catalyst was designed into a catalytic membrane, which could remove 96% of TC in a short time (<10 min). The cycle tests confirm that powdered MIL-88A(Fe)/g-C 3 N 4 composite catalyst and its catalytic membrane have a good recyclability and stability, demonstrating that this catalyst possesses a practical application potential in the treatment of TC polluted wastewater.
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RENEWABLE ENERGY
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2025
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IF 9.1
Jingchuan Guo,Yan Gao,Xuankai Cao,Linxuan Li,Xin Yu,Shidan Chi,Haoyu Liu,Guohong Tian,Xudong Zhao
The technology of using electricity generated from renewable energy sources such as wind and solar power for water electrolysis to produce hydrogen has achieved high efficiency, high purity, and environmental friendliness. However, its further development is constrained by the high overpotential of the oxygen evolution reaction (OER) and the high cost of precious metal catalysts. The methanol oxidation reaction (MOR) as an alternative to OER can significantly reduce overall energy consumption and accelerate the hydrogen evolution reaction. This study innovatively utilizes the metal-organic framework (MOF) of NH₂-MIL-88(Fe) to introduce Ni doping, preparing a series of Fe x Ni y -MOF and their bimetallic carbon derivatives (Fe x Ni y /C) through solvothermal synthesis and high-temperature carbonization. Results show that FeNi₂/C exhibited excellent performance in OER, with a Tafel slope of 38.69 mV·dec⁻ 1 and an overpotential of 335 mV at 10 mA cm⁻ 2 , comparable to RuO₂. In MOR, the overpotential was 193 mV, reduced by approximately 140 mV compared to OER, with outstanding stability. The catalytic mechanism was analyzed using ion chromatography, revealing the key role of Ni doping in enhancing catalytic activity and stability. This study provides new strategies for improving the electrocatalytic hydrogen production efficiency of renewable energy and reducing the production cost of hydrogen energy.
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JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Shaopeng Zhang,Jie Ding,Dayong Tian,Jing Wang,Jiale Zhang,Minghua Lu
China faces severe antimony pollution due to long-term, high-intensity mining and smelting operations. Long-term exposure to Sb(III) can lead to chronic respiratory problems. Adsorption method is used to remove Sb(III) because of its simplicity, economy and high efficiency. Therefore, a novel MIL-101(Fe)-Cl/SA hydrogel with oxidation-sorption bifunctionality was developed. 1602 cm −1 and 1025 cm −1 correspond to N H and S = O indicate N-chlorosulfonamide is bonded to MIL-101(Fe)-Cl/SA. MIL-101(Fe)-Cl/SA exhibited rough and wrinkled surfaces with numerous irregular particles by SEM. The presence of O (22 %) and Cl (2 %) confirmed the incorporation of N-chlorosulfonamide and SA into MIL-101(Fe)-Cl/SA by EDS and mappings. The adsorption capacities of MIL-101(Fe)-Cl/SA were 86 mg/g at 298 K and 123.21 mg/g at 328 K by Langmuir model. Kinetic and equilibrium correspond to pseudo-second-order and Langmuir model, respectively. Adsorption was spontaneous and endothermic by thermodynamic analysis. MIL-101(Fe)-Cl/SA exhibited enhanced selectivity in solution containing various ions. Moreover, MIL-101(Fe)-Cl/SA demonstrated potential for regeneration and reuse. The removal process primarily involved oxidation, electrostatic interaction, and complexation. In summary, the capability of MIL-101(Fe)-Cl/SA to adsorb and oxidize Sb(III) underscores its promising potential in mitigating the hazards associated with Sb(III).
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2018
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IF 11.698
Tingting Huang,Qingyi Peng,Wenjin Shi,Jundong Xu,Yu Fan
This article proposes a novel sodium dodecylbenzenesulfonate (SDBS)-assisted equilibrium adsorption method for preparing highly dispersed Ni/Al 2 O 3 and Fe-promoted NiFe/Al 2 O 3 thioetherification catalysts. The proposed strategy anchors nickel cations onto the electronegative surface of an Al 2 O 3 support modified by negatively charged DBS − bilayers. As a result, this method achieves highly dispersed Ni nanoparticles without strengthening the metal-support interaction, promoting the reducibility and sulfurization of the supported Ni species. The as-prepared Ni-based catalysts have a smaller size, a higher dispersion of metal nanoparticles, and a greater amount of active metal sulfides than their counterparts prepared by the conventional impregnation method, endowing them with excellent catalytic performance for the highly selective removal of mercaptans. This method provides a new opportunity to prepare highly dispersed metal nanoparticles without a strong metal-support interaction.
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APPLIED SURFACE SCIENCE
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2018
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IF 4.439
Jiangdong Dai,Zhongshuai Chang,Atian Xie,Ruilong Zhang,Sujun Tian,Wenna Ge,Yongsheng Yan,Chunxiang Li,Wei Xu,Rong Shao
The research of superhydrophilic interface is developing rapidly, but the preparations of superhydrophilic surfaces through simple methods are still challenging. Herein, we reported a facile, rapid and environmentally-friendly approach for preparing a novel superhydrophilic and underwater superoleophobic membrane via the thermal oxidation of Cu mesh and one-step coordinated assembly of Fe(III)-CMC chelate hydrogel. Superhydrophilicity was attributed to the hydrophilicity of Fe(III)-CMC chelate hydrogel and nanoneedle-like rough structure of CuO@Cu membrane. The membrane was used to separate a variety of oil/water mixtures and exhibited excellent separation performance. Moreover, the membrane exhibited the excellent durability and superior stability against corrosion conditions. We envision that the Fe(III)-CMC@CuO@Cu membrane with good underwater superoleophobicity could provide a candidate not only for oil/water separation but also many other potential applications such as underwater oil manipulation, self-clean, and bio-adhesion control.
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