Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Sha Shi,Jihui Wang,Chunhong Xu,Jie Mao,Yaohui Bai
Carbamazepine (CBZ), a typical pharmaceutical and personal care product (PPCP), has an annual global consumption exceeding several thousand tons. Its molecular structure contains symmetrical nitrogen-containing aromatic heterocycles, which resist degradation by conventional biochemical methods, resulting in persistent aquatic pollution. Integrating photocatalytic processes with Fenton reaction provides a targeted approach for its effective elimination from aquatic systems. However, traditional photo-Fenton systems suffer from inefficient Fe 3+ /Fe 2+ redox cycling due to sluggish Fe³⁺ regeneration and rapid recombination of photogenerated charge carriers. To address these challenges, this study designed a facet-engineered BiVO 4 photocatalyst through selective deposition of FeOx nanoparticles on the electron-rich (010) facets of monoclinic BiVO 4 via hydrothermal and photodeposition methods. The optimized FeOx/BiVO 4 composite exhibited exceptional degradation performance for CBZ, achieving a rate constant of 0.317 min -1 , which is 24-fold higher than that of pristine BiVO 4 . Mechanistic investigations revealed that the selective FeOx deposition not only promoted the valence-state transition of Fe 3+ to Fe 2+ but also enhanced charge carrier separation, thereby establishing a sustainable Fe 3+ /Fe 2+ redox cycle. Electron paramagnetic resonance (EPR) analysis and radical quenching experiments further identified hydroxyl radicals (·OH) as the dominant reactive species. This work provides a paradigm for designing efficient photo-Fenton reaction systems through targeted facet engineering, offering broad implications for the remediation of PPCPs.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2017
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IF 3.33
Baohuai Zhao,Zesheng Yang,Rui Ran,Zeliang Guo,Xiaodong Wu,Duan Weng
In this work, hollow-structured MnO x and FeO x -MnO x were synthesized by self-template route and applied for CO oxidation . FeO x -MnO x exhibited better catalytic activity than MnO x . It could convert 79.1% CO at 20 °C and had a higher CO conversion during the temperature ramping. The FeO x species could react with HCl and greatly helped to increase the specific surface area (428.5 m 2 g − 1 ) and pore volume (0.82 cm 3 g − 1 ) of the catalyst. The reserved FeO x in the FeO x -MnO x sample enhanced the redox properties and increased the amount of reactive oxygen species.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Wenjiao Chen,Hui Zhao,Binbin Xu,Qiaorong Jiang,Susu Bao,Zhiyuan Jiang
To satisfy the growing demand for military and civil applications, it is necessary to develop high-efficiency microwave-absorbing materials. Herein, a pyrolysis process was developed to construct FeO x /Fe/C composites using filter papers saturated with ferric nitrate solution as the precursor. The three-dimensional textures of filter paper are well maintained during the pyrolysis process. Ferric nitrate is decomposed to Fe 2 O 3 and subsequently reduced to Fe 3 O 4 and Fe nanoparticles embedded in the carbon matrix via carbothermal reduction. Various gases produced during the pyrolysis process create foam and generate additional nanoscale pores in the carbon matrix. The chemical composition and structure of composites can be tailored by controlling the pyrolysis conditions. The microwave absorption properties of FeO x /Fe/C composites are closely related to the chemical composition and structure. The optimized product shows excellent microwave absorption properties: The strongest reflection loss (RL) is −37 dB at ∼12 GHz; the effective absorption bandwidth (RL < −10 dB) is 6.5 GHz with a thickness of 2.0 mm. The superior absorption properties of the optimized product can be ascribed to the synergies of multiple chemical components, hierarchically porous structures and abundant interfaces. This study also suggests a large-scale synthesis strategy for high-yield carbon-coated magnetic nanoparticles for high-performance microwave absorption materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Weiping Xiao,Yuhang Chen,Changwang Ke,Fengyan Han,Caiqin Wang,Xiaofei Yang
Constructing transition metal multiphase composites can improve the electrocatalytic efficiency of (sea)water splitting via interfacial interaction between adjacent active sites. Herein, the self-supporting NimSn-FeOx heterostructure is in situ grown on nickel foam (NF) through a corrosion engineering approach, which displays abundant dendritic array structures, endowing the material with abundant active sites and high electrocatalytic active area. The control of introducing Fe3+ and sulfur precursors can effectively trigger the phase transiting from Ni3S2 to Ni9S8, generating more S vacancies, which could reduce the reaction energy barrier and improve the electrocatalytic performance. Simultaneously, the presence of Fe–S bonding at the sulfide/oxide interface brings a strong electronic interaction, which enables the tuning of the adsorption energy of the reaction intermediates and accelerates the catalytic reaction kinetics. As a result, the Ni9S8–FeOx/NF-Fe8.0 catalyst presents low overpotentials of 159 mV and 190 mV for oxygen evolution reaction at 100 mA cm–2 under 1 M KOH solution and simulated seawater conditions, respectively. The overall water splitting incorporating the Ni9S8–FeOx/NF-Fe8.0 as both anode and cathode provides the potential of 1.707 V in 1 M KOH and 1.794 V in simulated seawater at 100 mA cm–2. This research furnishes an efficient strategy toward the design of advanced transition metal heterogeneous composites with strong interfacial interaction for (sea)water splitting.
研究领域:
材料科学
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电化学
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能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Yong Liu,Le Zhang,Ting Liu,Jianlong Wang
The selective oxidation of ammonium nitrogen (NH 4 + -N) to dinitrogen (N 2 ) by advanced oxidation processes (AOPs) is of paramount significance, but it is still a great challenge. In this study, a novel composite (FeO x -MgO) was synthesized to activate persulfate (PS) for selective oxidation of ammonium (NH 4 + ) to N 2 under simulated solar-light irradiation ( hv ). The results demonstrated that the conversion of NH 4 + to ammonia (NH 3 ) on the basic sites of FeO x -MgO was a key step for the selective oxidation of NH 4 + . Fe(IV) species formed in FeO x -MgO/PS/ hv system could enhance both the efficiency and N 2 selectivity of the NH 4 + -N oxidation through the oxidation of ammonia hydride to N 2 . The 100 % NH 4 + -N removal and over 95.5 % N 2 selectivity could be achieved after 30 min when initial pH was in range of 2–10, and the initial NH 4 + -N concentration was 30 mg N/L. This study could provide a promising technology for the selective oxidation of NH 4 + -N to N 2 in water and wastewater.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Wenxiu Yan,Yongli Shen,Chao An,Lina Li,Rui Si,Changhua An
Tuning the crystal phase of metals and constructing the metal-oxide interface provide a new way to improve oxygen evolution reaction (OER) kinetics. Herein, we developed a room-temperature plasma topology conversion of Fe 3+ doping Ni(OH) 2 nanosheets to porous hcp Ni engineered by FeOx clusters. X-ray absorption fine spectra established that they were formed via Ni-O-Fe bonds. The metal oxide-metal interfaces with benign geometry and electronic structures enable it to be applied as efficient electrocatalyst, exhibiting overpotential of 226 mV at 10 mA cm −2 . In situ Raman spectra show that the interfacial action of FeOx cluster with Ni can stimulate the generation of active intermediate of γ-NiOOH, effectively promoting OER rate. DFT calculation further demonstrates the interaction accelerates desorption of O 2 molecules on the surfaces. This work provides a simple and robust strategy to synthesize oxide clusters engineering metastable metal nanocatalysts, offering new platform to explore efficient catalysts in various fields.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 22
·期 13
·4341-4349
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IF 9.48
Yuxue Xiao,Qingwei Meng,Xiaoli Pan,Chao Zhang,Zaihui Fu,Changzhi Li
para-Xylene (PX) is a basic building block of polyethylene terephthalate, which is currently produced from petroleum resources. Developing a renewable route to PX is highly desirable to address both economic and environmental concerns. Several attempts used noble metal catalysts, e.g. Pd/Al2O3, to synthesize PX from biomass-derived 4-methyl-3-cyclohexene-1-carboxaldehyde (4-MCHCA), but suffered from a severe decarbonylation reaction, resulting in toluene as the main product. In this paper, we report an FeOx modification strategy to suppress the decarbonylation reaction on a Pd/Al2O3 catalyst, leading to a drastic shift in selectivity towards PX with a yield up to 81% via a cascade dehydroaromatization–hydrodeoxygenation (DHA–HDO) pathway. Characterization and control experiments revealed that the electron density of Pd sites decreased in an FeOx-modified Pd/Al2O3 catalyst compared to Pd/Al2O3, thus tuning the preferential adsorption mode of the substrate from η2-(C,O), the key transition state of the decarbonylation reaction, to the η1-(O) mode that favors the hydrodeoxygenation process. Notably, this designed catalyst is highly stable and is readily applicable in the selective synthesis of a broad range of desired aromatic chemicals via the same DHA–HDO pathway from cyclohex-3-enecarbaldehyde derivatives. Overall, this work develops a controllable catalyst modification strategy that tailors an efficient catalyst for petroleum-independent bio-PX synthesis.
研究领域:
催化化学
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可再生资源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
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IF 6.14
Fengmin Qin,Jiankang Zhang,Zhan Zhou,Hao Xu,Lin Cui,Zhengxing Lv,Yong Qin
Nanozymes have great potential to replace natural enzymes due to their multiple enzyme-mimicking properties in practical applications, and the development of high-efficiency nanozymes is of great necessity. Herein, FeOx/TiO2 nanozymes with confined structures were synthesized by atomic layer deposition (ALD), among which the 70FeOx/TiO2 nanozymes with highly dispersed Fe single atoms and FeOx nanoclusters confined in the pores of TiO2 nanoflower supports exhibit optimized peroxidase activity. Furthermore, the ultrathin modification strategy of ALD (1-cycle TiO2) followed by reduction treatment was conducted to achieve the 1TiO2-70FeOx/TiO2-H nanozymes, whose enzyme-like activity is almost 2 times higher than that of 70FeOx/TiO2 counterparts. Investigation of the catalytic mechanism shows that atomic-level modification of TiO2 modifies the FeOx electron states, contributing to the stronger capability to generate hydroxyl radical, which results in remarkably enhanced peroxidase activity. The present work may provide new insights into the rational design of high-efficiency nanozymes at an atomic level.
研究领域:
材料科学
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催化化学
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生物医学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2021
·Vol. 11
·期 8
·915
·
IF 4.146
Yongjie Xin,Sichan Li,Haiyong Wang,Lungang Chen,Shuang Li,Qiying Liu
The selective hydrogenolysis of 5-hydroxymethylfurfural (HMF) platform molecule to 2,5-dimethylfuran (DMF) has attracted increasing attention due to its broad range of applications. However, HMF, with multiple functional groups, produces various byproducts, hindering its use on an industrial scale. Herein, a bimetallic Pt-FeOx/AC catalyst with low Pt and FeOx loadings for selective HMF hydrogenolysis to DMF was prepared by incipient wetness impregnation. The structures and properties of different catalysts were characterized by XRD, XPS, TEM, ICP-OES and Py-FTIR techniques. The addition of FeOx enhanced Pt dispersion and the Lewis acidic site density of the catalysts, and was found to be able to inhibit C=C hydrogenation, thereby im-proving DMF yield. Moreover, the presence of Pt promoted the reduction of iron oxide, creating a strong interaction between Pt and FeOx. This synergistic effect originated from the activation of the C–O bond over FeOx species followed by hydrogenolysis over the adjacent Pt, and played a critical role in hydrogenolysis of HMF to DMF, achieving a yield of 91% under optimal reaction conditions. However, the leaching of Fe species caused a metal–acid imbalance, which led to an increase in ring hydrogenation products.Keywords:5-hydroxymethylfurfural;2,5-dimethylfuran;hydrogenolysis;Pt-FeOx/AC;synergistic effect
研究领域:
化学工程
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催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xiaowen Zhong,Jianglin Liu,Bowen Liu,Xiaofei Wang,Xuliang Lin
The development of productive and durable non-precious metal catalysts for the sluggish oxygen evolution reaction (OER) is critical for water splitting. Herein, a novel NiSe-FeO x heterojunction encapsulated in lignin-derived carbon layer (NiSe-FeO x @LC) was synthesized via hydrothermal self-assembly and in-situ pyrolysis . NiSe-FeO x @LC exhibited excellent OER performance with an overpotential of 265 mV at 50 mA·cm −2 , a Tafel slope of 83 mV·dec −1 , as well as long-term stability. Both experimental and DFT calculation results indicated that the doping of FeO x into NiSe@LC successfully optimized the dual interface structure between NiSe and FeO x , thereby promoted the d-bands orbital hybridization, that facilitated electron transfer . Besides, the carbon coating effectively protected the NiSe-FeO x components from leaching and agglomerating during the reaction. This study provides insight into the significance of lignin-derived carbon-encapsulated metallic catalyst for electrocatalytic OER process.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yongli He,Jiali Zhang,Hongyu Zhou,Gang Yao,Bo Lai
In this study, bimetallic particles (CuO@FeO x @Fe 0 ) were prepared by displacement plating and calcination to activate peroxymonosulfate (PMS) for the degradation of sulfamethoxazole (SMX). First, the key preparation parameters (i.e., theoretical Cu mass loading (TML Cu ) and calcination temperature) of CuO@FeO x @Fe 0 preparation were investigated by single-factor experiments. Then the properties of CuO@FeO x @Fe 0 were analyzed by scanning electron microscope energy dispersive spectrometry (SEM-EDS), energy dispersive spectrometry mapping (EDS-mapping), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Subsequently, effects of PMS dosage, CuO@FeO x @Fe 0 dosage and initial pH on the degradation of sulfamethoxazole were studied respectively. Meanwhile, the results of control experiments indicated that the initial SMX degradation efficiency of CuO@FeO x @Fe 0 system was slower, but the final degradation rate was higher than that of Fe 0 /PMS system, which was due to the sustained release effect of Fe 2+ . In addition, the quantitative experiment of SO 4 − indicated that SO 4 − generated continuously in CuO@FeO x @Fe 0 /PMS system. Furthermore, the detection results of quenching tests and electron paramagnetic resonance (EPR) revealed the generation of multiple reactive oxygen species (i.e., SO 4 − , HO , O 2 − , 1 O 2 ) in CuO@FeO x @Fe 0 /PMS system, which degraded SMX synergistically. Finally, the SMX degradation pathways were proposed based on the intermediates detected by Liquid Chromatography-Quadrupole time of flight – Mass Spectrum (LC-QTOF-MS/MS) and the activation mechanism of CuO@FeO x @Fe 0 /PMS system was analyzed in detail. This study provided a new insight on the application of CuO@FeO x @Fe 0 on organic pollutant degradation.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jiajie Ye,Xuan Tang,Lu Cheng,Shoujie Zhang,Wangcheng Zhan,Yanglong Guo,Li Wang,Xiao-Ming Cao,Kuan-Wen Wang,Sheng Dai,Yun Guo
Metal/metal oxide clusters possess a higher count of unsaturated coordination sites than nanoparticles, providing multiatomic sites that single atoms do not. Encapsulating metal/metal oxide clusters within zeolites is a promising approach for synthesizing and stabilizing these clusters. The unique feature endows the metal clusters with an exceptional catalytic performance in a broad range of catalytic reactions. However, the encapsulation of stable FeOx clusters in zeolite is still challenging, which limits the application of zeolite-encapsulated FeOx clusters in catalysis. Herein, we design a modified solvent-free method to encapsulate FeOx clusters in pure siliceous MFI zeolites (Fe@MFI). It is revealed that the 0.3–0.4 nm subnanometric FeOx clusters are stably encapsulated in the 5/6-membered rings intersectional voids of the pure siliceous MFI zeolites. The encapsulated Fe@MFI catalyst with a Fe loading of 1.4 wt % demonstrates remarkable catalytic activity and recycle stability in the direct oxidation of methane, while also promoting the direct oxidation of cyclohexane, surpassing the performance of conventional zeolite-supported Fe catalysts.
研究领域:
化学
·
材料科学
·
催化反应
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）