WATER RESEARCH
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2016
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IF 5.991
Zhexin Zhu,Yi Chen,Yan Gu,Fei Wu,Wangyang Lu,Tiefeng Xu,Wenxing Chen
Iron (II) phthalocyanine (FePc) molecules were isolated in polyacrylonitrile (PAN) nanofibers by electrospinning to prevent the formation of dimers and oligomers . Carbamazepine (CBZ) and Rhodamine B (RhB) degradation was investigated during a Fenton-like process with FePc/PAN nanofibers. Classical quenching tests with isopropanol and electron paramagnetic resonance tests with 5,5-dimethyl-pyrroline-oxide as spin-trapping agent were performed to determine the formation of active species during hydrogen peroxide (H 2 O 2 ) decomposition by FePc/PAN nanofibers. After eight recycles for CBZ degradation over the FePc/PAN nanofibers/H 2 O 2 system, the removal ratios of CBZ remained at 99%. Seven by-products of RhB and twelve intermediates of CBZ were identified using ultra-performance liquid chromatography and high-resolution mass spectrometry. Pathways of CBZ and RhB degradation were proposed based on the identified intermediates. As the reaction proceeded, all CBZ and RhB aromatic nucleus intermediates decreased and were transformed to small acids, but also to potentially toxic epoxide-containing intermediates and acridine, because of the powerful oxidation ability of • OH in the catalytic system.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Fengtao Chen,Xingxing Shi,Xiaobing Chen,Wenxing Chen
To endow poly(vinylidene fluoride) (PVDF) membranes with the performance of fouling resistance and the capability of catalytic degradation of organic contaminants, iron (II) phthalocyanine (FePc) as a modifier was incorporated into PVDF matrix to prepare a novel FePc/PVDF composite membrane via non-solvent induced phase separation technique. ATR-FTIR spectroscopy, XPS , SEM, streaming potential analysis, contact angle measurement and cross-flow filtration test were employed to investigate the influence of modification on membrane property and performance. It was found that the introduction of FePc in PVDF membrane matrix resulted in improved porosity, mean pore size, surface hydrophilicity and negative charge of as-prepared composite membranes, and thereby enhanced membrane permeability and antifouling property. Owing to the presence of Fenton-like catalyst FePc, the composite membranes are imparted the catalytic degradation function for adsorbed organic foulants in soaking H 2 O 2 solution. The catalytic self-cleaning capability of the composite membrane with 2.5 wt% FePc was further proved by fluorescence probe technique which was employed to detect the generation of ·OH radicals in catalytic self-cleaning process. This indicates that the FePc/PVDF composite membrane has a potential application in water treatment with its combined advantage of membrane separation and catalytic self-cleaning.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2016
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IF 2.822
Yaofang Xuan,Lisiqi Xie,Xiao Huang,Bin Su
Liquid/liquid interface electrochemistry has manifested itself as a good approach to study oxygen reduction reaction (ORR) and ORR catalyzed by various catalysts. In this work, we investigated the ORR catalyzed by iron(II) phthalocyanine (FePc), which has a structure similarity to the heme group of O 2 -binding proteins and reducing enzymes, at the polarized water/1,2-dichloroethane interface. Using the four-electrode cyclic voltammetry and the shake-flask biphasic reaction under chemically controlled polarization, it was demonstrated that FePc could catalyze the molecular oxygen reduction by lipophilic electron donors , such as 1,1′-dimethylferrocene (DFc) or tetrathiafulvalene (TTF), at the heterogeneous phase boundary . The overall process essentially can be equivalent to an interfacial proton transfer coupled ORR, which proceeds preferentially via a four electron reduction pathway to produce mainly H 2 O with only minority of H 2 O 2 (less than 5%). The catalytic activity of FePc was compared with all previously studied porphyrins and phthalocyanines. The reaction mechanism was also analyzed, in which a hydroperoxo intermediate was probably involved.
研究领域:
电化学
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催化化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yanbin Wang,Zezhou Shi,Haibo Shen,Qiushuang Xing,Yunqing Pi
Efficient and selective removal of organic contaminants using traditional radical-dominated Advanced Oxidation Processes (AOPs) in complex environmental matrices is challenging, especially under high salinity conditions. This study proposes an alternative approach using iron (II) phthalocyanine-supported g-C 3 N 4 composite (FePc/CN) as a peroxymonosulfate (PMS) activator to efficiently remove organic contaminants. The FePc/CN-PMS process was selective towards the elimination of various organic contaminants, and those compounds with lower ionization potential value can be effectively degraded after reaction for 10 min. Results from radical quenching experiments, electron spin resonance (ESR), and PMSO chemical probe indicated that the dominant active species in the FePc/CN-PMS process are high-valent iron-oxo species (Fe IV O 2+ ), rather than the long-recognized SO 4 •− and •OH radical. A total of 22 intermediate products resulting from the degradation of levofloxacin (LVF) were identified by LC-MS. Additionally, two degradation pathways of LVF were proposed, with the piperazine ring of LVF being the primary site of degradation. The 5%FePc/CN-PMS system demonstrates resistance to ubiquitous inorganic anions and dissolved organic matter (DOM) in an aquatic environment, enabling efficient removal of (LVF) even under high salinity conditions. Furthermore, the 5%FePc/CN catalyst exhibits good chemical stability and reusability, making it a viable option for practical water remediation.
研究领域:
环境科学
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化学
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水处理
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Hengli Qian,keyuan Zhang,Chao Xie,Qidong Hou,Ruite Lai,Guanjie Yu,Tianliang Xia,Xinyu Bai,Meiting Ju
To achieve efficient degradation of pharmaceuticals and personal care products (PPCPs), the g-C₃N₄-WO₃@FePc system was in-situ constructed using a calcination method, with g-C₃N₄-WO₃ serving as the support matrix. This approach effectively resolved the issue of FePc aggregation and self-degradation in aqueous environments. The g-C₃N₄-WO₃@FePc catalyst demonstrated excellent performance in the photo-Fenton degradation of acetaminophen (ACE), achieving over 90% degradation within just 20 minutes under simulated sunlight. The catalyst's superior performance is attributed to the synergistic effects between the reaction centers. The π-π conjugation between g-C₃N₄-WO₃ (the photocatalytic center) and FePc (the Fenton catalytic center) facilitates the transfer of photo-generated electrons from the photocatalytic center to the Fenton catalytic center, enabling rapid regeneration of Fe(II) and generating a significant amount of active species (•O₂⁻ and 1 O₂). To validate the stability of the catalytic system, factors such as ionic impurities and water types affecting performance were investigated and analyzed. Additionally, cell toxicity and antimicrobial tests were conducted to evaluate the toxicity of ACE degradation intermediates and the ecological stability of g-C₃N₄-WO₃@FePc, revealing its potential for practical wastewater treatment applications.
研究领域:
环境催化
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光化学
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水处理
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材料科学
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环境毒理学
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纳米催化
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污染物降解
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Yu Wang,Danyang Wu,Jiao wu,Xizhen Zhang,Yongze Cao,Baojiu Chen
We breakthrough the conventional high-temperature paradigm for synthesizing transition metal catalysts by discovering 500 °C as a critical metastable window in ultrafast (>1500 °C/s) Joule heating synthesis. This kinetically confined thermal shock at precisely 500 °C uniquely terminates metal aggregation while locking abundant pyridinic-N sites (2.86 at.%) that effectively anchor highly dispersed Fe and Co species, simultaneously sculpting a defect-rich carbon matrix. This unique combination, inaccessible in traditional pyrolysis, unlocks exceptional synergistic activity. Consequently, the 500 °C-engineered NC-FeCo catalyst achieves an oxygen reduction record: half-wave potential (0.92 V) surpassing Pt/C (0.85 V) and 1500 °C-treated analogs (0.85 V), while delivering near-theoretical 4e − selectivity (<1.2% H₂O₂), negligible decay (ΔE = 3 mV/5000 cycles), and superior methanol tolerance. Our work establishes sub-second 500 °C thermal shock as an innovative platform for metastable dual-metal electrocatalysis.
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 21.1
Yinkun Gao,Shuyun Guan,Yongqing Wan,Mingyang Liu,Yiman Ma,Xiaojie Xu,Jiashu Yuan,Guokang Han,Peng Gao,Yongming Zhu,Shuaifeng Lou,Xudong Li
Single-dispersed active sites show great promise for lithium-oxygen batteries (LOBs) due to their unique chemical environments and high utilization rates. However, the inherent limitations of surface orbital steric effects and internal electronic coupling yield a detrimental impact on the stability of the active center, particularly during multipathway transformations and electronic recombination evolution of reaction intermediates. In this work, we introduce a curvature-triggered geometric deformation engineering to enhance the dynamic evolution of adsorption and activation processes for intermediates. By optimizing the dynamic geometric deformation of planar molecules through reasonable substrate strain, the deposition and decomposition kinetics of discharge products via dual growth pathways were facilitated, enabling the development of a highly stable LOBs with an impressive cycle life exceeding 1800 hours. Our research uncovers the multi-dimensional correlations among orbital rehybridization, the depth of electronic structure recombination, and the LiO 2 intermediate adsorption energy landscape under spatial confinement effects, providing valuable insights for their future design and activity promotion.
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Dandan Jiang,Danyang Wu,Yu Wang,Yongze Cao,Xizhen Zhang,Baojiu Chen
The design of Pd-based alloys with tailored electronic structures and stable architectures is crucial for enhancing catalytic properties. Here, we present a rapid Joule heating strategy for fabricating a palladium-iron (PdFe) alloy anchored on nitrogen-doped carbon (NC–FePd) featuring exceptional performance and durability. By combining ultrafast phase formation and quenching, the NC-FePd system achieves uniform dispersion of cubic-phase FePd 3 nanoparticles with minimized agglomeration. X-ray diffraction and XPS analyses reveal lattice expansion planes and electron transfer between Pd and Fe, which lowers the d-band center of Pd, thereby weakening the Pd–O binding energy. In alkaline media, NC-FePd achieves an exceptional half-wave potential (0.84 V vs. RHE), showing a clear advantage over commercial Pt/C (0.82 V vs. RHE), coupled with elevated limiting current density (6.01 mA cm −2 ) and the diminished Tafel slope (53.73 mV dec −1 ). This work sheds light on the synergy between rapid Joule-heating synthesis and Fe–Pd electronic modulation for designing durable alloy catalysts.
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
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2025
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IF 6.1
Xiaodan Qi,Shengnan Zhang,Zhifei Wang,Han Zhang,Lianghui Ma,Lihua Jin,Yehua Shen
The emerging field of nanozymes has introduced unprecedented opportunities and challenges for activated charcoal materials derived from biomass waste. By incorporating specific nanostructures or elements, it is possible to overcome the limitations of traditional activated charcoal, such as insufficient catalytic active sites and poor electron transfer efficiency, thereby unlocking its full potential for various applications. In this study, we successfully synthesized trace Fe-doped activated charcoal (Fe-AC) with a graphene-like structure from biomass waste. The Fe atoms were uniformly dispersed on the activated charcoal support, which possessed a high surface area. This not only significantly increased the number of catalytic active sites but also enhanced electron transfer efficiency, substrate mobility, and collision probability. Compared to pristine activated charcoal, the synthesized Fe-AC exhibited multiple enzyme-mimetic activities, including oxidase-like, peroxidase-like, and catalase-like activities. By leveraging its peroxidase-like activity in conjunction with nitrite-specific diazotization reactions, we developed a portable, smartphone-assisted, on-site ratiometric colorimetric hydrogel sensor for nitrite detection. Utilizing smartphone-based digital imaging, this sensor enabled the quantitative analysis of nitrite at concentrations ranging from 1 to 200 μmol/L, with a detection limit as low as 1 μmol/L. The approximate range of hazardous nitrite concentrations could be easily identified with the naked eye, and the proposed strategy was successfully applied to real sample analysis. This sensor not only maximizes the utilization of waste resources, thereby reducing production costs, but also offers greater economic feasibility and environmental sustainability. Given these advantages, it holds promise for broader applications in various fields.
研究领域:
材料科学
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环境科学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Yifan Zhang,Sylvestre Ndayiragije,Ming Chen,Xiaobo Wang,Lihua Zhu,Nan Wang
Fe- and nitrogen-doped carbonaceous (Fe-N-C) sites supported on MnO 2 (Fe-N-C@MnO 2 ) were prepared by a solvent-free mechanochemical method for peroxymonosulfate (PMS) activation to degrade norfloxacin (NFX). After a 50-min ball milling of iron(II) phthalocyanine (Fe( II )Pc) and MnO 2 at a weight ratio of 7.5 %, the obtained Fe-N-C@MnO 2 exhibited exceptional activity in PMS activation, achieving nearly complete degradation of NFX in 5 min with a rate constant of 0.62 min −1 . This rate constant was 11.5 and 28.2 times higher than that for milled MnO 2 (bm-MnO 2 ) and the mixture of Fe( II )Pc and MnO 2 , respectively. Alternative iron sources (FeSO 4 , FeCl 2 , Fe(III)-EDTA) and phthalocyanine showed no enhancement. Characterization revealed Fe-N-C@MnO 2 possessed abundant Mn 3+ , oxygen vacancies and Fe-N-C sites. Combined experimental and computational studies demonstrated Fe-N-C@MnO 2 simultaneously enhanced the 1 O 2 generation and facilitated the formation of SO 4 •− , •OH and O 2 •− , with contributions to NFX degradation following: 1 O 2 > •OH ≈ O 2 •− > SO 4 •− . This work establishes mechanochemical coordination engineering as a facile strategy for constructing high-performance metal-N-C hybrid catalysts.
研究领域:
环境科学
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催化
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材料化学
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机械化学
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水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Zhaotian Chen,Juan Wang,Sibudjing Kawi,Qin Zhong
Developing high-efficiency bifunctional electrocatalysts capable of overcoming the sluggish kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is an urgent challenge for rechargeable zinc-air batteries (RZABs). Herein, we successfully prepared an excellent bifunctional catalysts through facile pyrolysis-free method. Nickel/iron layered double hydroxide (NiFe-LDH) with OER activity was in situ grown on carbon nanotubes (CNTs) and iron (II) phthalocyanine (FePc) with ORR activity was introduced through π-π interaction and covalent functionalization. Furthermore, the intervention of CNTs transform the electronic structure of NiFe-LDH to further enhance OER activity, while solve the problems of poor electrical conductivity and aggregation of FePc. The prepared bifunctional catalyst FePc-LDH@CNTs exhibits preeminent electrocatalystic performance for ORR ( E 1/2 = 0.815 V) as well as OER ( E j=10 = 1.447 V). It displays a prominent bifunctionality which Δ E is only 0.632 V. Moreover, the liquid RZABs based on the FePc-LDH@CNTs demonstrate a significant specific capacity (810.4 mAh g −1 ) and robust stability (840 h), superior to commerical Pt/C + RuO 2 . As flexible RZABs, it maintains superb stability (100 h) and can drive water splitting to produce H 2 smoothly. In addition, the reasons for the failure are dissected by analyzing the components of the battery after cycles. This study provides a novel facile direction to prepare high-efficient and stable bifunctional oxygen electrocatalysts without pyrolysis.
研究领域:
材料科学
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电化学
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储能
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yangke Long,Guicong Xiao,Jian Dai,Yanyun Chen,Hua-Yue Zhu,Dan Peng,Huosheng Li
Emerging single-atom materials and metal sulfides hold significant promise as alternatives to precious metal catalysts for nitroaromatics conversion; however, their intrinsic activity and durability remain insufficiently understood. Herein, sulfur and nitrogen co-doped carbon matrices incorporating CoS nanoparticles and single-atom Co with Co–N 4 –S 1 coordination were constructed through a facile pyrolysis approach. Advanced characterization techniques, such as X-ray absorption fine structure (XAFS) and aberration-corrected electron microscopy, unveiled unique structural features underpinning exceptional catalytic efficiency and recyclability. The catalyst achieved a specific catalytic rate of 134 min −1 g −1 L for p -nitrophenol (PNP) hydrogenation, outperforming many noble metal-based catalysts. Experimental and theoretical analyses identified the Co–N 4 –S 1 single-atom moiety as the primary active site, demonstrating remarkable structural stability. Axial sulfur coordination was found to fine-tune the electronic state of the central Co atom, mitigating the overbinding of reaction intermediates and enhancing PNP conversion efficiency. In contrast, CoS nanoparticles exhibited limited recyclability, with agglomeration, cobalt hydroxide formation, and dissolution observed during repeated use. This study presents a highly efficient catalyst for nitroaromatics conversion and provides a foundational framework for understanding the durability and mechanistic roles of cobalt-based active sites.
研究领域:
环境科学
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材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）