Water
·
2023
·Vol. 15
·期 24
·4241
·
IF 3.4
Jiamin Chen,Ruijun Ren,Yatao Liu,Chen Li,Zhenbei Wang,Fei Qi
Modification of catalysts by multi-heteroatom doping (S, P, B) is an effective way to improve the peroxomonosulfate activation performance of catalysts. In recent years, highly toxic and persistent trace organic contaminants have been frequently detected in water. Consequently, we proposed the advanced oxidation processes of peroxomonosulfate activated by multi-heteroatom doped Fe@CN (X-Fe@CN) to eliminate trace organic contaminants. The physical phases of X-Fe@CN and its precursors were characterized by X-ray diffraction and scanning electron microscopy. In evaluating the catalytic properties and iron ion leaching of X-Fe@CN-activated PMS for the removal of dicamba and atenolol, B-Fe@CN and PB-Fe@CN were selected and optimized. The active sites of the catalysts were characterized by X-ray photoelectron spectroscopy and Raman. The pathways of PMS activation by B-Fe@CN and PB-Fe@CN were identified in combination with electron paramagnetic resonance and electrochemical experiments. Defects, O-B-O and pyrrolic nitrogen on the surface of B-Fe@CN could adsorb and activate PMS to produce SO4•−, ·OH and1O2. Further doping with P enhanced the electron transfer on the catalyst surface, thus accelerating the activation of peroxomonosulfate. This study compared the effects of multi-heteroatom modifications and further demonstrated the synergistic effect between P and B, which can provide a theoretical basis for the selection of multi-heteroatom doped catalysts in water treatment.Keywords:peroxymonosulfate;trace organic contaminants;multi-heteroatom doping;reaction mechanism
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 38
·13047-13055
·
IF 6.4
Xuemei Zhou,Lingmin Kong,Junkai Hao,Jing Feng,Shuo Sun,Chuanzhen Zhou,Yanmin Liu,Zhengquan Yan,Xiao Zhu,Lei Hu
To strengthen the enzyme-mimetic catalytic activity of the classical transition metal oxide of copper and iron, bimetal Cu–Fe oxide mesoporous nanoparticles (Cu–Fe MNPs) were prepared in one pot under microwave-assisted conditions. The proposed Cu–Fe MNPs possessed a well-distributed mesoporous structure with an average aperture of 3.91 nm and a high BET specific surface area of 197.93 m2 g−1. Their peroxidase-like kinetic parameters (Km/Vmax) toward catalyzing the redox reactions of TMB and H2O2 were 0.013 mM/3.01 × 10−8 M s−1 and 56.58 mM/4.12 × 10−8, respectively. In particular, both toxic o-aminophenol (o-AP) and bioactive glutathione (GSH) could deteriorate their peroxidase-like property with an obvious color change from blue to colorless in the proposed Cu–Fe MNPs-TMB-H2O2 system. Under optimized conditions, Cu–Fe MNPs-TMB-H2O2 showed selective response to o-AP and GSH with quite low detection limits of 1.57 × 10−8 mol L−1 (S/N = 3) and 3.35 × 10−8 mol L−1 (S/N = 3), respectively. When they were applied for the visual monitoring of o-AP and GSH in real aqueous, fruit juice and medicinal samples, the detection recovery (%) was between 96.8–101.4% for o-AP and 97.1–105.8% for GSH. The mechanisms of the synergetic enhancement of the peroxidase-like activity of Cu–Fe MNPs and the selective recognition of o-AP and GSH were investigated in detail.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Hongxing Chen,Renquan Wang,Jun Li,Chang Liu,Xiaojiao Yang,Ying Liu
The combination of high coercivity and resistivity is a strong requirement for permanent magnets to resist thermal demagnetization under complex operating conditions. However, this still remains a challenge for conventional strategies, which always sacrifice the maximum energy product as the coercivity or resistivity increases. In this work, we report a unique strategy of introducing only 0.1 wt% of insulating nano-diamonds (NDs) into the hot-deformed Nd-Fe-B magnets to significantly and simultaneously improve both magnetic properties ( H ci , B r , (BH) max and H k / H cj ) and resistivity. In particular, the coercivity increased by 60% from 746 to 1193 kA/m. Further microstructure observations indicate that this exceptional effect stems from NDs can effectively inhibit the formation of coarse grains and optimize the distribution of Nd-rich phases, ensuring a strong pinning effect to enhance hard magnetic performance. Meanwhile, the presence of additional grain boundaries and NDs can also lead to higher resistivity by preventing the movement of free electrons. Our work provides a distinctive strategy for interface modification with excellent comprehensive performance in permanent magnets.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zilong Zhao,Yatao Ren,Shuyu Qi,Zigong Ning,Xing Wang,Wenyi Dong,Hongjie Wang
Heavy metal complexes pose a challenge in terms of their resistance to removal due to their stable and intricate structure. In this study, we explored the utilization of Fe and N co-doped biochar derived from rice husk (Fe-N-RHBC) as catalytic particle electrodes in a three-dimensional electro-Fenton (3D-EF) system for the decomplexation and removal of a model pollutant, Ni-EDTA. The characterization analysis and comparison of catalytic activities confirmed the beneficial effects of Fe and N co-doping on various aspects, such as the types of active sites, interfacial electron transfer properties, and H 2 O 2 decomposition capacity. Compared to other investigated oxidation systems, the 3D-EF process demonstrated rapid removal of Ni-EDTA within the initial minute, with a maximum H 2 O 2 utilization of 99.1% after 30 min. The prepared catalytic particle electrodes exhibited high stability and catalytic capacity even after three consecutive cycles. Throughout the reaction, several processes, including anode oxidation, particle electrode polarization, catalysis, and adsorption of Fe-N-RHBC, as well as cathodic electro-deposition, synergistically contributed to the treatment of Ni-EDTA. The surface-bound O 2 − radicals and 1 O 2 generated by the Fe-N-RHBC catalytic particle electrode played a crucial role in the decomplexation and removal of Ni-EDTA. Building upon these findings, we further proposed potential mechanisms for the removal of Ni-EDTA in the 3D-EF system using the Fe-N-RHBC catalytic particle electrode.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jun Chen,Shangqing Xia,Xiaohong Yang,Xue Li,Zhaoming Chen,Zihui Song,Yutong Wang,Zongsheng Zhan,Jie Jin,Dongliang Shao
New technology is required for the effective disinfection of pathogenic bacteria in water. A novel type of activator material (Fe-Mg-Mt-SS) was prepared using bimetallic iron-magnesium (Fe-Mg), montmorillonite (Mt), and sewage sludge carbon (SS) and applied it for disinfection. The specific surface area of Fe-Mg-Mt-SS was 115.72 m 2 /g, and the spatial structure of Fe-Mg-Mt-SS was orderly and layered. Mt played a role in frame support, and Fe-Mg was integrated into the structure in an orderly manner. Fe-Mg-Mt-SS effectively activated persulfate (PS) to disinfect Escherichia coli ( E. coli ) in water, with a disinfection rate of 7.00 lg of E. coli within 80 min in the PS/Fe-Mg-Mt-SS system, and the high disinfection rate was stable under different pH and elevated temperatures. Fe-Mg-Mt-SS showed broad spectrum disinfectant efficiency against other bacteria ( Staphylococcus aureus, Pseudomonas aeruginosa, and Bacillus subtilis ). Fe-Mg-Mt-SS activated PS killed E. coli mainly by producing hydroxyl and oxygen radicals, which damaged the E. coli cell membrane. Bimetallic activation with Fe and Mg synergistically activated PS, graphitised SS had more orderly spatial and laminar structures, and Mt improved the thermal stability and layer spacing of Fe-Mg-Mt-SS, which facilitated better metal insertion and improved its activation properties. The preparation of Fe-Mg-Mt-SS and activation of PS provide a new technology for the disinfection of pathogenic bacteria in water.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jun Zhang,Lin Hao,Zitong Chen,Yongjun Gao,Huan Wang,Yufan Zhang
Owing to the high demand for clean and renewable energy technologies, several studies have focused on developing economically feasible, highly effective, and stable non-precious electrocatalysts for promoting the oxygen evolution reaction (OER). This development has stimulated an expansion of investigative quests and indicated the importance of advancing electrocatalytic research in this field. Through a facile and efficient method, Ni nanoparticles were uniformly embedded into nanoporous carbon nanorods (Ni-NCN), which are subsequently electrodeposited on CoFe-layered double hydroxide (LDH) nanosheets to produce highly efficient Ni-NCN/CoFe-LDH composites used for OER. The composite exhibited excellent catalytic activity toward OER owing to its low overpotential (ƞ10 mA = 280 mV), small Tafel slope (42 mV dec −1 ), and excellent durability. The Ni-NCN/CoFe-LDH catalyst exhibited higher OER activity owing to its uniformly dispersed Ni nanoparticles, large specific surface area, enhanced electron transport, and synergistic effect of multiple composites. Additionally, the enhanced synergistic effect of Ni-NCN promoted higher OER performance compared with Ni-undoped carbon nanorod/LDH, indicating that the Ni dopant and LDH significantly contributed to the overall OER performance. The synergistic effect of multiple composites significantly contributed to the excellent OER performance, indicating their potential as OER catalyst.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 31
·12596-12610
·
IF 4.5
Liu Jun,Wang Hui,Chang Meng-Jie,Li Wen-Juan,Bai Ge,Xie Heng-Xue,Li Xin,Du Hui-Ling,Song Shi-Jie
MIL-100(Fe) has been demonstrated as a commonly used photocatalyst but is limited by the deficient charge separation efficiency and difficult recovery. In this work, by taking advantages of the strong plasmonic absorption and electron conductivity of Ag nanoparticles, as well as the fast magnetic response of the Fe 3 O 4 , core/shell Ag/Fe 3 O 4 @MIL-100(Fe) (AFM) was facilely prepared by a direct hydrothermal reaction between H 3 btc and Ag/Fe 3 O 4 (AF) for photo-Fenton degradation of RhB assisted by H 2 O 2 . Specifically, the Fe 3 O 4 in AF acted as both ion precursor and protector to inhibit Ag aggregation to obtain uniform and dispersed core/shell AFM. By adjusting the MIL-100(Fe) thickness and the Ag proportion, the optimum AFM exhibits superior photo-Fenton activity to decompose 88.5% RhB within 30 min under visible-light irradiation and H 2 O 2 addition, which is much higher than that of AFM in the presence of either light (58.5%) or H 2 O 2 (46.6%) due to the synergistic effects of visible-light absorption by MIL-100(Fe) and ·OH generation from H 2 O 2 . Moreover, the catalyst can be collected conveniently for its strong magnetic responsibility. This work may be beneficial to the development of effective photo-Fenton catalysts. Graphical abstract A novel magnetically recyclable Ag/Fe 3 O 4 @MIL-100(Fe) with special core/shell structure was facilely synthesized by hydrothermal method with superior photo-Fenton activity for dye degradation.
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Foods
·
2023
·Vol. 12
·期 14
·2794
·
IF 5.2
Shushan Gao,Chonghao Zhu,Liangfei Ma,Chenghai Liu,Hongqiong Zhang,Shengming Zhang
To reduce the usage of petroleum-based plastic products, a lignin-based film material named aminated lignin/Fe(III)/PVA was developed. The mixture of 8 g lignin, 12 mL diethylenetriamine, 200 mL NaOH solution (0.4 mol·L−1), and 8 mL formaldehyde was heated at 85 °C for 4 h; after the aminated lignin was impregnated in the Fe(NO3)3solution, a mixture of 3 g aminated lignin/Fe(III), 7 g PVA, and 200 mL NaOH solution (pH 8) was heated at 85 °C for 60 min; after 2 mL of glycerin was added, the mixture was spread on a glass plate to obtain the aminated lignin/Fe(III)/PVA film. This film demonstrated hydrophobicity, an UV-blocking function, and a good slow-release performance. Due to the formation of hydrogen bonds between the hydroxyl groups of lignin and PVA, the tensile strength, the elongation at break, and the fracture resistance of the film were 9.1%, 107.8%, and 21.9% higher than that of pure PVA film, respectively. The iron content of aminated lignin/Fe(III)/PVA was 1.06 wt%, which mainly existed in a trivalent form. The aminated lignin/Fe(III)/PVA film has the potential to be used as a food packaging material with anti-ultraviolet light function and can also be developed as other packaging materials, such as seedling bowls, pots for transplanting, and coating films during transport.Keywords:lignin;polyvinyl alcohol;Fe(III);packaging material;slow-release function
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高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 8
·1-9
·
IF 5.7
Yang Chunlei,Xu Guiju,Hou Chenghao,Peng Lizeng,Wang Weiting,Zhang Hongwei,Zhang Xiaoling
A fluorometric and colorimetric dual-modal nanoprobe (denoted as Fe 2+ -Phen/SiNPs) has been developed for selective and sensitive determination of nitrite (NO 2 − ). The mechanism is based on fluorescence quenching between silicon nanoparticles (SiNPs) and Fe(II)-phenanthroline complex (Fe 2+ -Phen) via inner filter effect and redox. With the addition of increasing NO 2 − , Fe 2+ is oxidized to Fe 3+ , recovering the fluorescence of SiNPs. Meanwhile, the color of the system gradually changes from orange-red to colorless, which enables colorimetric measurement. The NO 2 − concentration shows a wide linear relationship with fluorescence intensity from 0.1 to 1.0 mM ( R 2 = 0.9955) with a detection limit of 2.4 μM in the fluorometric method (excitation wavelength: 380 nm). By contrast, the linear range of the colorimetric method ranges from 0.01 to 0.35 mM ( R 2 = 0.9953) with a limit of detection of 6.8 μM (proposed selective absorbance: 510 nm). The probe has been successfully applied to nitrite determination in water, salted vegetables, and hams demonstrating broad application prospects for the determination of nitrite in complicated matrices. Graphical Abstract
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yihua Cao,Xueli Yin,Yonghao Gan,Ying Ye,Run Cai,Bo Feng,Qi Wang,Xiaoping Dai,Xin Zhang
Designing bifunctional electrocatalysts with high efficiency and low cost for water splitting is urgently required for the production of green hydrogen. Herein, a bifunctional iron-doped cobalt borate/cobalt phosphide hybrid supported on nickel foam (Fe-CoB i /CoP/NF) was fabricated via hydrothermal and phosphating process. Benefit from the unique nanoneedle architecture for faster mass transfer, the existence of borate on CoB i for accelerating proton transfer , the moderate adsorption of H* species on CoP, Fe doping and the synergistic effect between CoB i and CoP, Fe-CoB i /CoP/NF hybrid exhibits a low overpotential of 137 mV and 260 mV at 100 mA cm −2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Moreover, Fe-CoB i /CoP/NF||Fe-CoB i /CoP/NF also presents a low cell potential of 1.65 V@100 mA cm −2 for overall alkaline water splitting and excellent durability (128 h) without decay. This work provides a new insight into the design of bifunctional electrocatalysts simultaneously through the morphological engineering and heteroatomic doping.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Qiyun Zhang,Xin Wang,Haobin Chen,Fusen Tian,Qilang Lin
In this study, eco-friendly and magnetic sucrose-derived Fe-containing mesoporous carbon (Fe-MC) composites have been prepared by carbothermal reduction . The Fe-MC3-1000 prepared from sucrose and FeSO 4 with a mass ratio of 1:1 at 1000 °C has a uniform mesoporous structure with a BET surface area of 184 m 2 /g. The carbothermal reduction of Fe 2 O 3 had dual effects of the pore-forming and the loading. Batch adsorption experiments and electrochemical measurements show that the Fe-MC3-1000 has the optimum performance in both adsorption and supercapacitor applications. For adsorption, the maximum adsorption capacity for Congo red (CR) arrived at 972.1 mg g −1 with a removal percentage of 97.2 %. The adsorption process has good agreement with Langmuir isotherm and Elovich kinetic models . Besides, the Fe-MC3-1000 exhibits good recyclability after five adsorption-desorption cycles. For supercapacitor, the Fe-MC3-1000 electrode has a capacitance value of 179.23 F g −1 and a capacitance retention of 92.8 % at 10 A g −1 after 2000 cycles. The outstanding adsorption and electrochemical performances suggest that the Fe-MC3-1000 is a competitive bi-functional material for adsorption and supercapacitor.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yaoyu Zhou,Jianlong Wang
Developing high performance electrocatalysts for effective antibiotics elimination for heterogeneous electro-Fenton (Hetero-EF) process is still a challenge. This work synthesized iron/cobalt bimetallic N doped graphitic carbon cages (Fe x Co@NC) from ZIF-8@ZIF-67-Fe dual MOF composite for Cephalosporin C (CEP-C) degradation in the Hetero-EF system at a wide pH range. Results indicated that CEP-C degradation rate and total organic carbon (TOC) removal efficiency by Fe 40 Co@NC catalyst were as high as 82.45% (60 min) and 61.35% (240 min) at natural pH, respectively. The unique structure with FeCo bimetal encapsulated inside the N doped graphitic carbon cages enabled Fe 40 Co@NC to show excellent catalytic reactivity for H 2 O 2 activation. The generated M (•OH) and •OH all contributed to CEP-C degradation. The synergistic effects of Co 0 /Co 2+ /Co 3+ and Fe 0 /Fe 2+ /Fe 3+ cycles made Fe 40 Co@NC catalyst to continuously activate H 2 O 2 . Moreover, Fe 40 Co@NC catalyst showed good stability in consecutive cycles, and could still remain excellent reactivity when applied for CEP-C degradation from the real CEP-C fermentation residue supernatant. Furthermore, a possible CEP-C degradation pathway was proposed based on the identified intermediates.
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