ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Kunli Song,Kaiyu Guo,Yixuan Lv,Dandan Ma,Yonghong Cheng,Jian-Wen Shi
Selective catalytic reduction with ammonia is the mainstream technology of flue gas denitration (de-NOx). The reducibility and acid site are two important factors affecting the de-NOx performance, and effective regulation between them is the key to obtain a highly efficient de-NOx catalyst. Herein, a series of Mn–Fe–BTC with different ratios of Mn and Fe are synthesized, among which 2Mn-1Fe-BTC with 2:1 molar ratio of Mn and Fe has excellent low-temperature (LT) de-NOx performance (above 90% NO conversion between 60 and 270 °C) and good tolerance to H2O and SO2 poisoning (88% NO conversion at 150 °C with 100 ppm of SO2 and/or 6% H2O). It is revealed that the reducibility properties and acid sites of Mn–Fe–BTC can be flexibly tuned by the ratio of Mn and Fe. The difference in electronegativity between Fe and Mn leads to the redistribution of valence electrons, which enables the controllable reducibility of Mn–Fe–BTC. Furthermore, different amounts of Mn and Fe lead to different electron transport, which determines the type and number of acid sites. The synergistic effect of Mn and Fe endows Mn–Fe–BTC with enhanced surface molecular adsorption capacity and enables the catalyst to selectively chemisorb NH3 and NO at different active sites. This research provides guidance for the flexible regulation of reducibility and acid site of LT de-NOx catalyst.
✓ 已验证
DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 8
·3876-3892
·
IF 9.6
Chai Fei,Zhao Fei-Ping,Hu Zhan,Wen Shi-Yi,Samia Ben-Hammouda,Fu Ze-Lin,Lai Xin-Ting,Liang Yan-Jie,Min Xiao-Bo,Chai Li-Yuan
Arsenic materials have attracted great attention due to their unique properties. However, research concerning iron–arsenic (Fe–As) alloys is very scarce due to the volatility of As at low temperature and the high melting point of Fe. Herein, a new Fe–As alloy was obtained by mechanical alloying (MA) followed by vacuum hot-pressed sintering (VHPS). Moreover, a systematic study was carried out on the microstructural evolution, phase composition, leaching toxicity of As, and physical and mechanical properties of Fe–As alloys with varying weight fractions of As (20%, 25%, 30%, 35%, 45%, 55%, 65%, and 75%). The results showed that pre-alloyed metallic powders (PAMPs) have a fine grain size and specific super-saturated solid solution after MA, which could effectively improve the mechanical properties of Fe–As alloys by VHPS. A high density (> 7.350 g·cm −3 ), low toxicity, and excellent mechanical properties could be obtained for Fe–As alloys sintered via VHPS by adding an appropriate amount of As, which is more valuable than commercial Fe–As products. The Fe-25% As alloy with low toxicity and a relatively high density (7.635 g·cm −3 ) provides an ultra-high compressive strength (1989.19 MPa), while the Fe-65% As alloy owns the maximum Vickers hardness (HV 0.5 899.41). After leaching by the toxicity characteristic leaching procedure (TCLP), these alloys could still maintain good mechanical performance, and the strengthening mechanisms of Fe–As alloys before and after leaching were clarified. Changes in the grain size, microstructure, and phase distribution induced significant differences in the compressive strength and hardness. Graphical abstract
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Jianfang Jiang,Kuaqian Deng,Rui Duan,Cong An,Fanglin Dao,Jiali Huang
Organophosphorus pesticides (OPs) are extensively utilized in agricultural production, but they pose significant threats to environment and organisms. This study aims to develop a novel method for the rapid and efficient detection of OPs. Initially, an iron/manganese zeolitic imidazolate framework (Fe/Mn-ZIF) with excellent oxidase-like activity was synthesised. The catalytic performance was evaluated, and the main factors influencing catalytic activity were investigated. Subsequently, a combined acetylcholinesterase assay was employed to detect three OPs. The specificity and recyclability of Fe/Mn-ZIF were also studied. The proposed colorimetric strategy demonstrated strong linear relationships: 0.1–2 mg/L for trichlorfon, 0.2–14 mg/L for glyphosate, and 0.4–10 mg/L for glufosinate, with the low detection limits of 0.024, 0.080, and 0.121 mg/L (3 S/N) respectively. Good recoveries were observed in real sample detection. This work lays a foundation for enhancing the catalytic performance of Fe/Mn-ZIF, which holds promise for biosensing applications.
✓ 已验证
DOI
PubMed
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Tao Xu,Meihui Jiang,Siyu Mo,Xianhui Wang,Tianlin Ren,Zhichen Liu,Zhicheng Wang,Yicheng Qiu,Lingying Gu,Xu Wang,Xuhui Mao
Graphical We designed a carbon-coated aluminum oxide carrier and reinforced it with Mn−Fe bimetal assemblages to prepare a high-performance catalyst Mn−Fe/C-Al 2 O 3 . Mn−Fe/C-Al 2 O 3 catalyst exhibited satisfactory catalytic ozonation activity and stability in the degradation of p -nitrophenol. Experiments and theoretical calculations revealed the internal degradation mechanism of the Mn−Fe/C-Al 2 O 3 catalyst, underscoring the role of the carbon-coated and bimetallic active unit in O 3 activation. Catalysts with high catalytic activity and low production cost are important for industrial application of heterogeneous catalytic ozonation (HCO). In this study, we designed a carbon-coated aluminum oxide carrier (C-Al 2 O 3 ) and reinforced it with Mn−Fe bimetal assemblages to prepare a high-performance catalyst Mn−Fe/C-Al 2 O 3 . The results showed that the carbon embedding significantly improved the abundance of surface oxygen functional groups, conductivity, and adsorption capacity of γ-Al 2 O 3 , while preserving its exceptional mechanical strength as a carrier. The prepared Mn−Fe/C-Al 2 O 3 catalyst exhibited satisfactory catalytic ozonation activity and stability in the degradation of p -nitrophenol (PNP). Electron paramagnetic resonance (EPR) and quenching experiments reveal that radical ( ⋅ OH and ⋅ O 2 ⋅ ) and nonradical oxidation ( 1 O 2 ) dominated the PNP degradation process. Theoretical calculations corroborated that the anchored atomic Fe and Mn sites regulated the local electronic structure of the catalyst. This modulation effectively promoted the activation of O 3 molecules, resulting in the generation of atomic oxygen species (AOS) and reactive oxygen species (ROS). The economic analysis on Mn−Fe/C-Al 2 O 3 revealed that it was a cost-competitive catalyst for HCO. This study not only deepens the understanding on the reaction mechanism of HCO with transition metal/carbon composite catalysts, also provides a high-performance and cost-competitive ozone catalyst for prospective application.
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yang Wang,Ruosong He,Kaixuan Huo,Pei Dong,Xiaoli Fu,Shujie Sun,Feng Qiu,Yiwu Lu,Qiang Liu,Guangbo Liu,Noritatsu Tsubaki,Mingbo Wu
Even though the carbon-based Fischer-Tropsch synthesis (FTS) catalysts deliver excellent performance owing to the outstanding physicochemical property of carbon materials, the poor mechanical strength and difficulty in formability are the bottlenecks for their practical and industrial applications, especially in a fixed-bed reactor. To tackle this obstacle, we propose a stepwise heat treatment protocol to successfully fabricate a biomass-derived monolithic carbon material with favorable mechanical strength. The carbon monolith can be employed as promising Fe-based active sites carrier to boost the olefins production performance of FTS. Compared with the powdered counterpart under the same reaction conditions (260 °C, 3 MPa, CO:H 2 = 1:2, GHSV = 3000 mL g cat −1 h −1 ), the catalytic activity of the monolithic catalyst is significantly increased from 37.2 % to 64.3 % while maintaining the high selectivity of olefin products (68.1 %), therefore the maximum olefin space–time yield approaching to extremely high value of 666 mg g Fe3O4 -1 h −1 (260 °C, 3 MPa, CO:H 2 = 1:2, GHSV = 6000 mL g cat −1 h −1 ). Multiple characterizations reveal that the formation of interconnected monolithic structure can be attributed to the dehydration-polymerization reaction between the biomass carbon and binder. Based on the heat and mass transfer simulations, it is obvious that the monolithic catalyst possesses superior mass and heat transfer performance and better reactants diffusion behaviors, which contribute to the formation of more χ-Fe 5 C 2 active phase for C-O bond activation and C-C bond coupling. This work will shed new light on the rational design of highly efficient monolithic FTS catalyst with remarkable strength for practical application at large scale.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jingwen Wang,Yu Yang,Lei Chen,Yanping Ding,Linli Tan,Qiulin Shi,Yong Liu,Pengchao Xie
Molybdenum disulfide (MoS 2 ) is viewed as a promising two-dimensional Fenton-like catalyst, but the basal plane could not be well applied in peroxides activation. In this study, Fe(III) species were atomically impregnated on the MoS 2 basal plane to enhance peracetic acid (PAA) activation. The surface Fe(III) up shifted the d-band centre of MoS 2 and acted as electron shuttles in breaking the O-O bonds of PAA. HO • , CH 3 COO • and Fe(V) were generated in the Fe(III)-MoS 2 /PAA system, whereas the 1 O 2 production was inhibited on the Fe(III)-MoS 2 surface. Sulfamethazine (SMT) was efficiently degraded by Fe(III)-MoS 2 /PAA during 15 min reaction, with the observed removal efficiencies of SMT by Fe(III)-MoS 2 ( k obs ) being 25-fold higher than that by MoS 2 . Increasing the dosages of PAA and Fe(III)-MoS 2 facilitated SMT degradation, and high removal rate of SMT was achieved in the pH range of 3–5. HO • and Fe(V) were identified as critical reactive species responsible for the SMT degradation. Nitrification and Smiles rearrangement were proposed as the degradation pathways of SMT based on the identified oxidation products. This study demonstrates that impregnating Fe species would be an effective strategy for strengthening the Fenton-like reactivity of MoS 2 .
✓ 已验证
DOI
高影响因子
TRANSITION METAL CHEMISTRY
·
2025
·
IF 1.7
Wang Yuqin,He Lizi,Han Ning,Li Lishuang,Wang Meiyang
It is of great practical significance to explore and prepare cheap, high-performance, and stable catalysts for oxygen reduction reaction (ORR), but it is still in progress at present. Herein, a straightforward evaporation–pyrolysis strategy is designed for the preparation of 3D porous electrocatalysts (denoted as \(\textrm{Fe}-\textrm{Co}-\textrm{NC}\) , which represented carbonization products at °C) made of carbon nanoparticles combined with metallic Fe-Co-doped N-enriched bridged carbon nanotube by carbonization of a pristine ZIF8 as highly efficient and durable ORR electrocatalysts. The obtained Fe–Co–NC structure possesses 3D open porous texture, abundant active sites, desired nitrogen bonding type, and high specific surface area, providing them with excellent ORR activity. The optimal performing \(\textrm{Fe}-\textrm{Co}-\textrm{NC}\) catalyst presents an outstanding ORR performance in terms of a high onset potential ( \(\textrm{E}_{\text{ onset } }\) ) of 0.96 V (vs. RHE) and half-wave potential ( \(\textrm{E}_{1 / 2}\) ) of 0.86 V (vs. RHE), respectively, possible to rival those of the commercially available \(\textrm{Pt} / \textrm{C}\) in an alkaline electrolyte solution. Besides, the \(\textrm{Fe}-\textrm{Co}-\textrm{NC}\) catalyst manifests better stability than those of commercially available \(\textrm{Pt} / \textrm{C}\) , which is of importance for the optimization and characterization of novel electrocatalysts originated from non-precious metals.
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Energy
·
2025
·
IF 6.2
Tang Wenbin,Xia Shuyue,Chou Haiwen,Zhao Jianan,Zhou Yi,Huang Qinghong,Yu Nengfei,Wu Yuping
The oxygen reduction reaction (ORR) plays a crucial role in key processes of fuel cells and zinc-air batteries. To enable commercialization, reducing the platinum (Pt) content and increasing the specific activity per unit mass is essential. A promising approach involves synthesizing of Fe-N-C precursors via the polyaniline (PANI) pathway, which ensures a uniform distribution of Fe-N-C species and facilitates the subsequent adsorption of platinum ions. This leads to the formation of Pt-Fe bimetallic alloys. The synergistic interaction between Pt and Fe-N-C sites promotes the homogeneous dispersion of Pt and the formation of smaller particle sizes, which in turn enhances intrinsic activity and stability of the catalyst. Notably, the Pt/Fe-N-C catalyst, featuring an ultra-low Pt loading of just 1.79 wt%, exhibits a remarkable doubling of mass activity compared to conventional catalysts. Moreover, zinc-air batteries using this catalyst achieve an impressive peak power density of 200 mW/cm 2 .
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2017
·
IF 6.942
Xiaoxiang Cheng,Heng Liang,An Ding,Xuewu Zhu,Xiaobin Tang,Zhendong Gan,Jiajian Xing,Daoji Wu,Guibai Li
Coagulation and ozonation have been widely used as pretreatments for ultrafiltration (UF) membrane in drinking water treatment . While beneficial, coagulation or ozonation alone is unable to both efficiently control membrane fouling and product water quality in many cases. Thus, in this study an emerging alternative of ferrous iron/peroxymonosulfate (Fe(II)/PMS), which can act as both an oxidant and a coagulant was employed prior to UF for treatment of natural surface water, and compared with conventional coagulation and ozonation. The results showed that the Fe(II)/PMS-UF system exhibited the best performance for dissolved organic carbon removal, likely due to the dual functions of coagulation and oxidation in the single process. The fluorescent and UV-absorbing organic components were more susceptible to ozonation than Fe(II)/PMS treatment. Fe(II)/PMS and ozonation pretreatments significantly increased the removal efficiency of atrazine, p -chloronitrobenzene and sulfamethazine by 12–76% and 50–94%, respectively, whereas coagulation exerted a minor influence. The Fe(II)/PMS pretreatment also showed the best performance for the reduction of both reversible and irreversible membrane fouling, and the performance was hardly affected by membrane pore size and surface hydrophobicity . In addition, the characterization of hydraulic irreversible organic foulants confirmed its effectiveness. These results demonstrate the potential advantages of applying Fe(II)/PMS as a pretreatment for UF to simultaneously control membrane fouling and improve the permeate quality.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Huakuo Zhou,Peng Li,Yifei Li,Yi Ke,Xia Zhang,Jun Meng
In recent years, most of the studies on nanozymes have focused on improving their catalytic activity and direct synthesis, but this task is still very complex. Bimetallic oxides are particularly popular due to their mixed valence and synergistic effects between different metal ions. In this study, Fe-Mn bimetallic oxide nano-cubes were prepared by fast and effective solvothermal synthesis, and nano-flower-like structures were grown on the surface of Fe-Mn oxide nanocubes via controlled etching. The synthesized Fe-Mn bimetallic oxide nano-flowers (FMBO NFs) have great oxidase-like activity. On this basis, a simple, economical and accurate colorimetric sensor was established by combining 3,3',5,5'-tetramethylbenzidine (TMB). Exposure to L-cysteine (L-Cys) inhibited the catalytic activity of FMBO NFs. As the concentration of L-Cys increased, the absorbance at 652 nm decreased, with a good linear relationship in the range of 0.01-1000 μM, with a limit of detection (LOD) of 3.99 × 10 -11 M, and the detection of L-Cys in the actual sample egg yolk was successfully achieved. This study provides theoretical support for the effective design of bimetallic oxide nanozyme activity, and can guide the development of an accurate detection system for the analysis of L-Cys in food.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Yanru Yin,Qi Xiao,Wenying Zhang,Kai Li,Dong Yan,Jian Li,Lichao Jia
Cathode materials greatly govern the performance of protonic ceramics fuel cells (PCFCs), and development of suitable cathodes for PCFCs now becomes important. In this study, the traditional proton conductor BaZrO 3 is tailored with Sr and Fe elements, aiming to design proper cathodes for PCFCs. The structural, electronic, and catalytic effects of dual-element doping on BaZrO 3 -based materials are systemically investigated. Experimental and computational analyses reveal that a 75 % iron doping concentration (BaZr 0 · 25 Fe 0 · 75 O 3 ) markedly enhances oxygen vacancy concentration, reduces proton migration barriers, and elevates electrical conductivity. Notably, moderate strontium doping (50 %) synergistically improves performance, whereas excessive doping (75 %) induces adverse effects on oxygen vacancy concentration, proton migration, and electrical conductivity. The optimized Ba 0 · 5 Sr 0 · 5 Zr 0 · 25 Fe 0 · 75 O 3 cathode achieves a peak power density of 945 mW cm -2 at 700 °C. These findings elucidate the interplay between dopant elements, doping concentrations, and material properties related to electrochemical performance, offering actionable strategies for designing high-performance PCFC cathodes.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Shuai Yang,Dongqi Tian,Xinhao Wang,Peng Zhou,Zhaokun Xiong,Heng Zhang,Yang Liu,Gang Yao,Bo Lai
Fenton-like technology has been widely used in the field of water treatment as an advanced oxidation processes (AOPs), and a multitude of non-homogeneous catalysts have been reported effectively to enhance it. Herein, nitrogen and sulfur co-doped nanocarbon materials (NSC) was designed and synthesized, which formed a unique mesoporous structure and abundant functional groups on the surface. It exhibits superior catalytic performance to enhance the Fe(III)/H 2 O 2 system for sulfamethoxazole (SMX) degradation, k obs is 18 times higher than Fe(III)/H 2 O 2 system after the introduction of NSC under the same experimental conditions. Also, the working pH of Fe(III)/H 2 O 2 system was broadened by NSC. Quenching and probe experiments demonstrate that hydroxyl radical (∙OH) was the dominant active species. Both dissociative and surface-bound iron species were observed, which indicates direct reduction and in-situ binding of Fe(III), respectively. Further investigation found nitrogen and sulfur co-doped attribute to the formation of abundant functional groups, the C O bond and C S C bond on the surface of NSC result in the directly reduce of Fe(III), while –COOH contributes to the in-situ binding. The intermediates and possible degradation pathway of SMX degradation were proposed based on the results of liquid chromatography-quadrupole time of flight-mass spectrometer (LC-QTOF-MS). The results of cycling and co-existing ions experiments demonstrate that NSC has outstanding potential for application. This work provides a novel insight into the sustained removal of micropollutants from the aqueous environment based on the nanocarbon materials enhancing the Fenton-like oxidation.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）