LANGMUIR
·
2021
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IF 3.882
Yu Wang,Jia Chen,Ming Guan,Hongdeng Qiu
An iron–nickel bimetallic oxide porous graphene composite material (Fe/Ni-PG) was prepared by a simple partial combustion method, which can be used to effectively remove sulfonamides (SAs) from an aqueous solution. The adsorption performance of Fe/Ni-PG, Fe-PG, and Ni-PG on six kinds of SAs was compared, and the influence of time, temperature, pH, and initial concentration of SAs on the adsorption behavior of SAs of Fe/Ni-PG in an aqueous solution was studied. The adsorption kinetics and thermodynamics exhibited that the Langmuir model and pseudo-second-order kinetics model can describe the adsorption isotherm and kinetics. The maximum adsorption capacities of sulfadiazine (SD), sulfamerazine (SM), sulfamethazine (SDM), sulfathiazole (STZ), sulfapyridine (SPD), and sulfisoxazole (SIZ) calculated by the Langmuir model were 26.3, 50.3, 42.2, 27.3, 34.5, and 41.7 mg/g, respectively, which exceeded those of most reported adsorbents. In the adsorption process, hydrogen bonding, π–π electron donor–acceptor, electrostatic interaction, and bimetallic synergies play a major role, and the entire adsorption process is spontaneously endothermic. In addition, the material has excellent stability, and the Fe/Ni-PG after desorption is consistent with the raw material. This work provides a favorable way for the removal of SAs in the environment.
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高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 10
·1-11
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IF 5.833
Qin
Peige,Han Lizhen,Zhang Xiaowan,Li Mengyuan,Li Dan,Lu Minghua,Cai Zongwei
Abstract Using MIL-101(Fe) as the source of carbon and Fe, a magnetic porous carbon (MPC) material with Fe 3 C nanoparticles encapsulated in porous carbon was prepared through one-pot pyrolysis under N 2 atmosphere. With MPC as adsorption material, a stir bar sorptive-dispersive microextraction (SBSDME) method was proposed to extract and preconcentrate sulfonamides (SAs) prior to HPLC-DAD determination. To investigate their extraction ability, different MPC materials were prepared under different carbonization temperatures (600, 700, 800, 900, and 1000 °C). The material prepared under 900 °C (MPC-900) exhibited the highest extraction ability for SAs. The as-prepared MPC materials were also characterized by Raman spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, zeta potential, and other techniques. The main parameters that affect extraction were systematically studied. Under optimal conditions, favorable linearity ( R 2 ≥ 0.9938) and detection limits (0.02–0.04 ng mL −1 ) of sulfonamides were obtained. The average recoveries for spiked milk and lake water samples ranged from 76.9 to 109% and from 75.4 to 118% with RSDs of 3.10–9.63% and 1.71–11.3%, respectively. Sulfameter and sulfisoxazole were detected in milk sample. Sulfisoxazole was detected in the lake water sample. The MPC-900 material demonstrated excellent reusability. It can be reused 24 times with peak areas having no obvious decline. The method can be applied to extract ultra-trace compounds in complex sample matrices. Graphical abstract
Schematic presentation of a stir bar sorptive-dispersive microextraction (SBSDME) by using magnetic porous carbon (MPC) composites as sorbent combined with high-performance liquid chromatography for sensitive analysis of sulfonamides in milk and lake water samples.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Cheng Zeng,Yan Wang,Tong Xiao,Zhicheng Yan,Jinquan Wan,Quanmo Xie
To improve the efficacy of organic pollutant removal using sulfate radicals, we designed MIP@C-Fe-Nx, a molecularly imprinted material capable of targeting the degradation of tetrabromobisphenol A (TBBPA), which can be used as both adsorbent and catalyst to recognize and degrade Tetrabromobisphenol A (TBBPA) accurately, and the final removal rate of TBBPA can reach 104.6 mg·g −1 . Based on the synergistic effects of MIP@C-Fe-Nx on the excellent organic pollutant recognition and catalytic performance, low concentrations of TBBPA can be pre-targeted, concentrated, and fixed on the surface of MIP, and degraded simultaneously in-situ by·OH and SO 4 •- which are produced by activating PS with C-Fe-Nx. Recognition experiments demonstrated that MIPs had perfect performance in recognizing and adsorbing TBBPA and debromination intermediates. The DFT calculations and HPLC-MS analysis indicated that MIP@C-Fe-Nx had a targeted recognition and accumulation for TBBPA and debromination intermediates, for example, dibromobisphenol A, monobromobisphenol A, and bisphenol A, thus avoid the formation of toxic intermediates causing secondary contamination.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Falong Wang,Yaqiang Dong,Liang Chang,Yan Pan,Qiang Chi,Mengji Gong,Jiawei Li,Aina He,Xinmin Wang
In this paper, a novel type of nano-CaCO 3 /epoxy nanocomposites insulating layer for the FeSiCr/carbonyl-iron soft magnetic composites (SMCs) has been successfully developed. The novel inorganic/resin nanocomposites can greatly reduce the core loss of the SMCs while maintain other excellent magnetic properties . By optimizing the content of insulating layer, the FeSiCr/carbonyl-iron SMCs exhibits the lowest core loss of 466.5 mW/cm 3 at a maximum magnetic induction of 50 mT and frequency of 100 kHz, which is greatly reduced by 24.2%, compared with the sample only coated by epoxy resin . Meanwhile, the effective permeability and quality factor remains high. In addition, the production process of the novel nano-CaCO 3 /epoxy nanocomposites insulating layer exhibits the advantages of simplicity, convenience and low cost compared with other ceramic coatings (Al 2 O 3 , MgO , SiO 2 , etc.) and surface nitride coatings, which is more suitable for the industrialization of molded inductors, and therefore has a variety of industrial application prospects.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Li Li,Zhi Huang,Yanying Liu,Ziqi Zhu,Mingjun Xu,Wenxuan Wei,Qian Zhang,Junming Hong
Novel porous Mn-Fe nanocubes (p-MnFe NCs) with abundant oxygen vacancies, which derived from Mn-Fe prussian blue analogue, were fabricated for the first time through annealing at H 2 atmosphere. Among the different molar ratios of Mn/Fe, p-Mn 1 Fe 1 NCs possessed abundant oxygen vacancies and exhibited excellent performance for peroxymonosulfate (PMS) activation to effectively degrade bisphenol A (BPA). As a result, 100% BPA (20 mg/L) degradation efficiency can be achieved within 30 min in the p-Mn 1 Fe 1 NCs/PMS system. SO 4 •− , HO•, O 2 •− and 1 O 2 were confirmed as main reactive oxygen species during catalytic reaction. The exposed Mn and Fe sites on the surface of p-Mn 1 Fe 1 NCs were the main active sites for the generation of reactive radicals. For non-radical generation pathway, the generated 1 O 2 and O 2 •− mainly originated from the reaction between dissolved oxygen and surface oxygen vacancies, and parts of 1 O 2 originated from the formation of intermediate O 2 •− . Radical and non-radical pathways were proposed in the p-Mn 1 Fe 1 NCs/PMS system for insights into the mechanisms of BPA degradation. Finally, the possible degradation pathways were proposed via ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC-TOF-Q-MS) analysis.
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高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Zenghua Xu,Ximing Zhang,Xufeng Yang,Youfang Yu,Hongjian Lin,Kuichuan Sheng
Corncob, as a sustainable biomass waste, is mainly composed of hemicellulose. Herein, on the basis of natural corncob as substrates, Fe/N co-doped porous carbon spheres were designed via a consecutive FeCl3-mediated hydrothermal reaction and mild KHCO3 activation route for supercapacitor electrode materials. Owing to the low hydrolysis temperature of hemicellulose and hydrolysis promotion of Fe3+, the corncob-derived hydrochar exhibited special carbon sphere morphology. Interestingly, the carbon sphere morphology was well-preserved upon the melamine-mediated KHCO3 activation. As a result of the short ion diffusion distance, unique packing architecture, and developed micro–mesoporous structure of the carbon spheres, optimized CCAC-Fe-M-50% manifested superior ion transfer kinetics and rate performances (87% up to 20 A g–1). Meanwhile, the electrochemical investigation of CCAC-Fe-M-50% in a three-electrode setup illustrated high capacitance (338 F g–1 at 1 A g–1). In a two-electrode setup, the CCAC-Fe-M-50%||CCAC-Fe-M-50% device revealed supreme cyclability (102.7% retention after 5000 cycles) and extremely low Rct (0.59 Ω) and Rs (4.54 Ω). These superior properties were attributed to the large SBET (2305.7 m2 g–1), the multiple redox possibilities (Fe3+, Fe2+, and N functional groups), and the carbon sphere morphology with a micro–mesoporous structure, which enhanced ion physisorption, pseudocapacitance, and electrolyte/ion diffusion, respectively. Besides, the fabricated CCAC-Fe-M-50%||CCAC-Fe-M-50% device in a neutral electrolyte demonstrated a superb energy density (ED) of 18.60 Wh kg–1 at the power density (PD) of 455 W kg–1. The currently presented strategy with superior results might lead to the novel development of biomass-based ultraperformance electrode materials for supercapacitors and other high-tech applications.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Wenbo Liu,Jiabin Zhou,Dan Liu,Su Liu,Xianjie Liu,Shuang Xiao,Choujing Feng,Changhong Leng
Background The combination of Fenton catalyst and photocatalyst will lead to the decrease in light absorption on the photocatalyst, and it is difficult for Fe 3+ to be converted into Fe 2+ on the Fenton catalyst, resulting in poor Fenton-like process and photocatalysis effect. Preparing catalysts containing oxygen vacancies (OVs) can simultaneously increase the light absorption and the cycle of Fe(Ⅲ) to Fe(Ⅱ) to improve the catalytic efficiency of Fenton-like process and photocatalysis. Methods A mesoporous H-MIL53 with OV was constructed by ligand selective pyrolysis. The formation mechanism of H-MIL-53 vacancy was analyzed by XPS, EPR, FTIR and TG. Significant findings XPS, EPR, FTIR and TG showed that calcination caused the fracture of Fe-O bond resulted in OV and coordinative unsaturated Fe site. H-MIL-53 showed higher degradation efficiency of tetracycline hydrochloride (93%) and high recycling performance. The electron-rich OV could activate the dissolved oxygen to produce •O 2 − through phot-introduced electrons, while the electron-poor iron site can activate H 2 O 2 to produce •OH. These results provide a new direction for the construction of metal-organic framework (MOF) containing OV for application in Fenton-like process and photocatalysis.
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高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Jian Cheng,Yirui Xie,Ying Wei,Dongrun Xie,Wenbo Sun,Ying Zhang,Menghong Li,Jiutao An
Dielectric barrier discharge (DBD) plasma coupled with Fe–Mn doped AC (Fe–Mn/AC) was used to enhance the degradation of tetracycline hydrochloride (TCH) wastewater. Fe–Mn/AC catalysts with different Fe/Mn molar ratios were prepared by hydrothermal method, and the physical and chemical properties of the samples were explored by different characterization techniques, including XRD, SEM , TEM and XPS. The results showed that the combination of DBD with Fe 2 –Mn 1 /AC system had the highest effect, and the degradation efficiency of TCH could reach 98.8 % after 15 min treatment, which was 25.5 % higher than that of DBD-only. With the increase of discharge voltage and catalyst dosage, the degradation efficiency of TCH promoted. And initial pH had little effect on the degradation of TCH. In the combined system, the Fe 2 –Mn 1 /AC catalyst could retain an excellent stability and reusability. The addition of dimethyl sulfoxide (DMSO) showed that ·OH participated in the TCH degradation. The generated O 3 might be catalyzed by Fe–Mn/AC catalyst to produce more ·OH. And more H 2 O 2 was produced in DBD-only system than that in DBD-catalytic system. Nine main degradation intermediate products in the combined system were detected by HPLC-MS, and three possible degradation pathways were proposed.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Ya-yun Li,Qiuming Zou,Zhangjian Li,Dong Xie,Yuan Niu,Jizhao Zou,Xierong Zeng,Junfeng Huang
Bimetallic electrocatalysers have attracted dramatic attentions in recent years owing to their unique electronic configuration, charge transfer efficiency and synergistic effect. Ni-Fe based alloys are considerable as one of the most promising materials with superior electrocatalytic performance since the outstanding oxygen reaction activity of iron and the strong capability of nickel. Herein, Ni-Fe MOF derived Ni-Fe alloys embedded graphitic carbon electrocatalyst is synthesized as bifunctional oxygen electrocatalyst with hierarchical porous structure and superior oxygen reaction electrocatalytic performance. The onset potential and the half-wave potential of Ni 0.6 Fe 0.4 CM in oxygen reaction are 0.88 V and 0.75 V, respectively, which are superior than those of commercial Pt/C. Furthermore, a low overpotential of 320 mV at 10 mA/ cm 2 is obtained in oxygen evolution reaction, which is well consistent with that of commercial RuO 2 . In the meantime, excellent long-term stability and anti-methanol ability endow Ni 0.6 Fe 0.4 CM exhibiting brilliant electrocatalytic performance as commercial Pt/C and RuO 2 . The assembled Zn-air battery exhibits smaller voltage gap (0.76 V) than that for commercial Pt/C and RuO 2 , and it has remarkable stability around 170 cycles in the discharge–charge test. These results summarize the merits of bimetallic electrocatalysers for bifunction electrochemical performance and promote the development of electrocatalytic applications.
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高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2021
·
IF 2.993
Desheng Pan,Qifeng Kuang,Peng Tong,Wei Tong,Liubing Fan,Jing Zhao,Da Li,Chuljin Choi,Zhidong Zhang
Challenges still remain in producing room-temperature ferromagnetism/ferrimagnetism in inorganic–organic hybrid compounds. Here, we report the Fe vacancy-doped inorganic–organic (Fe x Se 2 ) 2 Fe(dien) 2 (dien = diethylenetriamine, x = 0.86) hybrid cuboids by self-assemble of finite one-dimensional (1D) FeSe 2 chains and Fe(dien) 2 complexes. A growth model is proposed by kinetically controllable syntheses of novel Fe 2x+1 Se 4 (dien) 2 hybrids. The Rietveld refinement reveals that Fe vacancies in the Fe 2.71 Se 4 (dien) 2 hybrid cuboids induce large distortions of the FeSe 2 chains and the room-temperature lattice parameters are a = 9.225(4) Å, b = 18.021(8) Å and c = 11.609(6) Å. Magnetic measurements and electron spin resonance spectra of the Fe 2.71 Se 4 (dien) 2 hybrid cuboids show the ferrimagnetism with the Curie temperature (T C ) of 600 K and the spin glass state with the freezing temperature (T f ) of 108 K. Impressive room-temperature ferrimagnetic properties of the Fe 2.71 Se 4 (dien) 2 hybrid cuboids were ascribed to the high concentration of Fe 3+ vacancies (0.29 per cell) in the hybrid cuboids, which is supported by the 57 Fe Mössbauer spectrum fitting based on the ferrimagnetic model.
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高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Junhui Wang,Shimin Yin,Qinhua Zhang,Fengliang Cao,Yicheng Xing,Qingshan Zhao,Yang Wang,Wengang Xu,Wenting Wu,Mingbo Wu
Polymeric carbon nitride materials show intriguing prospects in numerous light-to-energy conversion applications, but seldom studies focus on their triplet energy transfer, leading to the insufficient lifetime for the photochemical process. Inspired by the porphyrin molecular photocatalyst, single-atom sites (Fe-N 4 ) as triplet sensitizing sites were fabricated in g-C 3 N 4 for the preparation of Fe-g-C 3 N 4 , which processes a long-lived triplet emissive state (τ PH = 4.93 μs). But under realistic condition for the large-scale production of catalyst, single atoms are inevitable to sinter, resulting in the formation of other metal species. Therefore, the photooxidation of 1,5-dihydroxynaphthalene (1,5-DHN) and the photocatalytic E-Z Isomerization of stilbene were selected as the model reactions to evaluate the influence of various Fe species on the triplet energy transfer. It was found that Fe-N 4 sites promote the triplet energy transfer process, while Fe nanoclusters (Fe 0 ) promote the electron transfer and inhibit triplet energy transfer. This finding provides guidance for the rational design of photocatalysts to efficiently improve triplet energy transfer process and its application.
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高影响因子
Journal of Water Process Engineering
·
2021
·
IF 5.485
Qiuya Zhang,Jun Xu,Xiaoyan Ma,Jinmei Xu,Zeping Yun,Qiaosheng Zuo,Liping Wang
Metal-organic frameworks (MOFs) are new porous materials that attract wide attention due to their environmentally-friendly photocatalytic characteristics. However, poor charge separation in most MOFs largely limits their photocatalytic activity. In this study, a novel Fe-based bi-MOFs heterojunctions material, namely NH 2 -MIL-88B(Fe)@MIL-100(Fe) was prepared by internal extended growth of MIL-100(Fe) on spindle-like NH 2 -MIL-88B(Fe). Compared with pure NH 2 -MIL-88B(Fe) and MIL-100(Fe), the synthesized Fe-based bi-MOFs structure catalyst displayed excellent photocatalytic degradation of tetracycline (TC), with optimal removal of 99.9% achieved in 90 min under neutral conditions. This result is attributed to the sufficient visible light absorption , and the enhanced separation and transfer of h + and e − by the bi-MOFs structure. In particular, ∙O 2 − , h + and ∙OH showed synergistic effects in the photodegradation process, and Fe-based bi-MOFs displayed high stability after five cycles. The inhibition ratio of luminescent bacteria of the degraded solution was lower than 24%, indicating the high efficiency and safety of this Fe-based bi-MOFs for the treatment of antibiotic-contaminated water.
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高影响因子
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