ENERGY & FUELS
·
2020
·
IF 3.421
Shiwei Ma,Shiyi Chen,Huijun Ge,Tao Song,Ping Lu,Wenguo Xiang
CeO2 is a typical fluorite oxide with desirable lattice oxygen conductivity and can be applied as an active support for the Fe-based oxygen carrier in chemical looping hydrogen generation (CLHG). However, Fe2O3/CeO2 always suffers from low thermal stability and sintering. Doping foreign cations could be a proper way to improve its reactivity and cyclic stability. In this work, Zr4+ and Sm3+, with a smaller ionic radius and lower valence than Ce4+, respectively, were doped into Fe2O3/CeO2 using the co-precipitation method, and the doping effects on the reactivity and redox stability of Fe2O3/CeO2 in CLHG were investigated. Fe2O3/Ce0.6Sm0.15Zr0.25O1.925 provided the best redox reactivity, and the purity of generated hydrogen for all oxygen carriers reached nearly 100% (the detection limit of CO/CO2 was 0.01% in volume). The reactivity followed the sequence Fe2O3/Ce0.6Sm0.15Zr0.25O1.925 > Fe2O3/Ce0.8Sm0.2O1.9 > Fe2O3/Ce0.75Zr0.25O2 > Fe2O3/CeO2. However, the concentration of oxygen vacancy was ranked as Fe2O3/Ce0.8Sm0.2O1.9 > Fe2O3/Ce0.6Sm0.15Zr0.25O1.925 > Fe2O3/Ce0.75Zr0.25O2 > Fe2O3/CeO2. The Zr doping boosted the reactivity of Fe2O3/CeO2 mainly by enhancing its sintering resistance, whereas the Sm doping achieved it mainly by promoting the oxygen conductivity, whose ability to improve the thermal stability of Fe2O3/CeO2 was rather limited. Both Zr and Sm doping could suppress the outward migration of Fe cations in the particles, resulting in higher sintering resistance. Furthermore, Zr and Sm could dissolve into CeO2 for prepared Fe2O3/Ce0.6Sm0.15Zr0.25O1.925; however, the bleeding out of both dopants was observed with Sm0.5Zr0.5O1.75 formation, which could be detrimental to the redox stability of the oxygen carrier.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 8
·e202404358
·
IF 2
Yuanpei Lan,Zhou Zou,Shuang Liu,Arun Murali,Baolei Wang,Qingwei Jia,Shirong Wang
Graphical A series of Fe 2 O 3 ─CeO 2 ─C 3 N 4 (Fe–Ce–CN) catalysts were synthesized by a KCl–LiCl molten salt method. The 0.5 wt.% Fe 2 O 3 loaded Fe–Ce–CN which synthesized at 550 °C for 4 h had an excellent photocatalytic activity towards to tetracycline (TC) degradation due to the significantly boosted separation efficiency of photoexcited electron-hole pairs. In this work, Fe 2 O 3 ─CeO 2 ─C 3 N 4 (Fe–Ce–CN) catalysts were synthesized in the KCl–LiCl molten salt system, and their photocatalytic properties towards tetracycline (TC) degradation in wastewater were studied. The obtained 0.5 wt.% Fe–Ce–CN, synthesized at 550 °C for 4 h with 0.5 wt.% Fe 2 O 3 , had the highest photocatalytic degradation efficiency for tetracycline (TC), which achieved degradation ratios of 98.3% and 96.9% for TC solutions at concentrations of 20 mg/L and 80 mg/L, respectively. Characterizations indicated that the 0.5 wt.% Fe–Ce–CN had significantly enhanced photo-excited electron-hole separation efficiency and promoted photocatalytic activity. Additionally, superoxide radicals · O 2 − and electrons ( e − ) were identified as the key reactive species for TC degradation with 0.5 wt.% Fe–Ce–CN, attributing to its band structure. The possible enhancement mechanism was discussed and proposed. The findings in this work provide a new approach to preparing high-performance photocatalysts and offer insights into the Fe–Ce–CN ternary photocatalysts.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2018
·Vol. 12
·期 1
·1-8
·
IF 1.961
Gao Pan,Song Yuan,Wang Shaoning,Descorme Claude,Yang Shaoxia
The Fe 2 O 3 -CeO 2 -Bi 2 O 3 /γ-Al 2 O 3 catalyst, a novel environmental-friendly material, was used to investigate the catalytic wet air oxidation (CWAO) of cationic red GTL under mild operating conditions in a batch reactor. The catalyst was prepared by wet impregnation, and characterized by special surface area (BET measurement), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The Fe 2 O 3 -CeO 2 -Bi 2 O 3 /γ-Al 2 O 3 catalyst exhibited good catalytic activity and stability in the CWAO under atmosphere pressure. The effect of the reaction conditions (catalyst loading, degradation temperature, solution concentration and initial solution pH value) was studied. The result showed that the decolorization efficiency of cationic red GTL was improved with increasing the initial solution pH value and the degradation temperature. The apparent activation energy for the reaction was 79 kJ·mol –1 . Hydroperoxy radicals (HO 2 ·) and superoxide radicals (O 2 – ·) appeared as the main reactive species upon the CWAO of cationic red GTL.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 8
·期 1
·1-18
·
IF 23.2
Yan Mengxing,Tan Yang,Dong Hanqi,Xu Huawei,Ling Zhe,Xiao Xiao,Huang Chen,Yong Qiang
The problems of heavy metal and dye contamination in wastewater urgently requires green, efficient, and convenient removal strategy. In this paper, a new type of γ-Fe 2 O 3 /CeO 2 /cellulose nanofibril (CNF) composite film (CNFMONP film) adsorbent based on nanocellulose was facilely prepared which is green, easy to be recycled, and has high-efficiency adsorption performance. The proposed CNFMONP films exhibited rough surface, excellent mechanical properties, and stability performance, as well as satisfying adsorption removal performance for Pb 2+ and Cu 2+ , with removal rates of 77.9% and 69.6%, respectively. In addition, a removal rate of up to 95.4% for the dye methylene blue (MB) was also achieved under UV illumination. The adsorption kinetics showed that the CNFMONP films were mainly chemisorbed for heavy metals. Besides, isotherm analysis indicated that monolayer adsorption is the adsorption behavior of the proposed film types adsorbent for heavy metals and dyes. Furthermore, the CNFMONP films still have excellent adsorption affinity after five rounds of cycles, with high adsorption efficiency of 75.0% for Pb 2+ in complex environment. Therefore, environmentally friendly CNFMONP films with excellent stabilization and adsorption properties were simply prepared, which may provide a highly efficient way for recyclable and multi adsorption of heavy metals and dyes.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 10
·1-10
·
IF 5.833
Xu Shengrui,Dong Panlong,Qin Ming,Liu Hailin,Long Anying,Chen Changpo,Feng Suling,Wu Hongjing
Core-shell structured Fe 2 O 3 /CeO 2 @MnO 2 microspheres were fabricated and used as solid-phase microextraction coating for determination of polycyclic aromatic hydrocarbons (PAHs) in water samples. XPS spectra demonstrated the generation of abundant surface oxygen on Fe 2 O 3 /CeO 2 @MnO 2 microspheres, which provided binding sites for enhancement of analyte extraction. Under optimized conditions, the proposed method presented good linearity in the concentration range 0.04–100 ng mL −1 , with low limits of detection varying from 0.38 to 3.57 ng L −1 for eight PAHs. Relative standard deviations for a single fiber and five batches of fibers were in the ranges of 4.1–8.2% and 7.1–11.4%, respectively. The proposed method was successfully used for determination of PAHs in real river water samples with recoveries ranging from 87.1 to 115.9%. The proposed method using as-prepared Fe 2 O 3 /CeO 2 @MnO 2 microspheres as SPME coating exhibit significant potential for real sample analysis due to its excellent reproducibility, high sensitivity, and good linearity. Graphical abstract
研究领域:
环境科学
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分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Guangzhao Zhou,Ziyu Wang,Xiaochao Wang,Yiran Zhang,Xuteng Zhao,Qi Chen,Ting Chen,Zhen Huang,He Lin
Nonthermal plasma catalysis offers the potential to synthesize ammonia on a distributed scale under ambient pressure by consuming renewable electricity. Clarifying the relationship between plasma discharge and the role of catalysts is beneficial to the performance improvement of nonthermal-plasma-catalytic ammonia synthesis (NTPCAS). In this study, the plasma discharge was enhanced using CeO2 and Fe2O3/CeO2 (Fe/Ce) mechanically mixed with dielectric Al2O3, recorded as Ce@Al and Fe/Ce@Al, respectively, and the promoting effect of plasma discharge enhancement on the catalytic role of Fe/Ce and CeO2 in NTPCAS was investigated in a dielectric barrier discharge reactor under atmospheric pressure. The results indicate that the concentration of ammonia synthesized using Fe/Ce was only 2.7% higher than that synthesized using CeO2 and that synthesized using Fe/Ce@Al was 36.5% higher than that synthesized using Ce@Al and 102.6% higher than that synthesized using Fe/Ce at maximum. In addition, the ammonia production rate of Fe/Ce in Fe/Ce@Al with the optimum Al2O3 mixing ratio was 8.8 times that in pure Fe/Ce. U–I curves, U–Qc curves, and self-luminous optical imaging results of the discharge region packed with the catalysts indicated that Al2O3 mixing effectively strengthened the plasma discharge. Catalyst characterization showed that Fe/Ce had better catalytic properties than CeO2, explaining the better performance of Fe/Ce@Al than that of Ce@Al in the NTPCAS. In situ N2 and H2 adsorption, desorption, and reaction behaviors over catalysts revealed that significantly improved N2 adsorption and activation over Fe/Ce@Al under plasma conditions were the key to NTPCAS. The strategy of mixing highly active ammonia synthesis catalysts with discharge-enhanced materials can significantly improve the performance of NTPCAS catalysts, thus providing a novel approach to designing catalysts for NTPCAS.
研究领域:
化学工程
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催化
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等离子体科学
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材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yu Lei,Yixing Hao,Hao Cheng,Jianfeng Ma,Yong Qin,Yong Kong,Sridhar Komarneni
Fe 2 O 3 @CeO 2 nanocomposites were synthesized by water bath heating method to activate NaHSO 3 for Orange II dye (50 mg L −1 ) degradation, which reached up to 98.2% within 120 min. The Fe 2 O 3 @CeO 2 and NaHSO 3 dosages and the molar ratios of Ce and Fe in Fe 2 O 3 @CeO 2 were investigated to obtain the optimum conditions as follows: 0.02 g Fe 2 O@CeO 2 , 0.1 g NaHSO 3 and the molar ratio of Ce and Fe was 5:2 (designated as Ce-Fe-1, or simply Fe 2 O 3 @CeO 2 ). In addition, Fe 2 O 3 @CeO 2 catalyst displayed superior catalytic performance to those materials that were previously reported, as verified by the good stability (reached 90.9% after three cycles) and high degradation rate of Orange II (98.2%) of the currently developed material. Existence of · SO 4 – and · OH radicals were verified by Electron Spin Resonance Spectroscopy during degradation, and these radicals are proposed to have high degradation efficiency of Orange II. On the basis of the detected radicals, a possible degradation mechanism was proposed to provide more choices for the application of sulfite in advanced oxidation processes (AOPs).
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Jinrui Zhang,Xiaozhi Liu,Yue Pan,Peng Li,Yuanhui Shen,Yuhan Wang,Tianlong Yang,Dong Su,Ying Pan,Hongguang Jin
Chemical looping dry reforming of methane holds great promise for both CO2 utilization and syngas production with high efficiency. The structure and composition of oxygen carriers are critical factors influencing CL-DRM performance. Incorporating CeO2 is known to enhance the reactivity and stability of Fe2O3 in chemical looping reforming. However, the underlying mechanism of how CeO2 synergistically interact with Fe2O3 to enhance performances remains unclear. In this work, we comparatively investigated CeO2-supported Fe2O3 OCs in interfacial and physical Fe–Ce contact modes. We found the sol–gel-synthesized Fe2O3/CeO2 OC is in-situ activated within the first cycle and transforms to pure CeFeO3 through a strong Fe2O3–CeO2 interaction. The activated CeFeO3 achieves over 80% CH4 conversion, 96% CO selectivity, and excellent stability due to the sufficient Fe–Ce interaction, proper valence state, and low-energy barrier for oxygen diffusion. Additionally, in-situ environmental transmission electron microscopy study shows that the Fe2O3–CeO2 interaction promotes the oxygen release of both oxides during reduction. Under the oxidative conditions, iron exhibits significant activity to dissolve into the CeO2 lattice and form CeFeO3. The investigation into the activation mechanism of the Fe2O3/CeO2 material provides valuable insights for designing straightforward and cost-effective OCs.
研究领域:
化学工程
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能源材料
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催化
·
环境科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Qian Zhu,Yanbo Wu,Lei Cao,Lanlan Fan,Liang Xu,Shixian Xiong
Developing cost-effective and durable oxygen reduction reaction (ORR) electrocatalysts is pivotal for the commercialization of zinc-air batteries (ZABs). Herein, nitrogen-doped porous carbon-supported Fe 2 O 3 /CeO 2 heterojunction electrocatalysts (Fe 2 O 3 /CeO 2 @NC) were synthesized via a supramolecular confinement strategy. By leveraging the melamine-folic acid framework to anchor FeCe Prussian blue analogues, a hierarchical porous carbon structure with uniform heterojunction nanoparticle dispersion was successfully constructed. Experimental characterization and DFT calculations reveal that the distinct work function difference between Fe 2 O 3 and CeO 2 induces spontaneous electron transfer, establishing a built-in electric field at the heterointerface. Synergized with abundant oxygen vacancies, this electronic modulation effectively optimizes the adsorption free energy of oxygen intermediates and lowers the rate-determining energy barrier. Consequently, the Fe 2 O 3 /CeO 2 @NC catalyst exhibits superior ORR activity with a half-wave potential of 0.83 V, rivaling commercial Pt/C, along with excellent methanol tolerance. Furthermore, the assembled liquid ZABs deliver a high peak power density of 146.4 mW cm −2 and demonstrate robust rechargeability for over 200 h, highlighting its potential for practical energy conversion applications.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Zhengjiang Liu,Junjie Tang,Jiani Wu,Timur Borjigin,Bing Bai,Yaqiong Wang,Hedong Huang
Herein, we report a Fe 2 O 3 /CeO 2 porous nanotube as a high-performance heterogeneous photo-Fenton-like catalyst, featuring a stable Fe-O-Ce heterojunction confirmed by XPS and TEM. This structural design, coupled with enhanced visible-light absorption induced by Fe 2 O 3 modification on CeO 2 , constitutes its core structural innovation. Under 440 nm blue LED irradiation and at pH 5, this composite achieves complete degradation of 80 mg/L methyl orange within 60 min with 0.5 mL of 15 % H 2 O 2 , exhibiting remarkable catalytic efficiency. Radical trapping experiments identify h + and OH as dominant active species, with O 2 − playing a secondary role. Notably, the catalyst maintains excellent performance after 4 cycles, highlighting its superior stability. Furthermore, CeO 2 facilitates electron transfer from H 2 O 2 to Fe 3+ , accelerating the Fe 3+ /Fe 2+ redox cycle. This accelerated cycle not only enhances H 2 O 2 activation and OH generation but also expands the pH operating range-overcoming the narrow pH limitation of traditional Fenton systems. Band analysis across the Fe 2 O 3 /CeO 2 heterojunction further clarifies the charge separation and transfer pathway underlying this enhanced catalytic behavior. With its exceptional co-catalytic activity, broad pH adaptability, and high stability, Fe 2 O 3 /CeO 2 porous nanotubes demonstrate great practical potential for real wastewater treatment. This work not only provides an efficient strategy for wastewater decontamination but also offers new insights into designing heterojunction-based catalysts for environmental remediation.
研究领域:
环境催化
·
材料科学
·
废水处理
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纳米技术
·
高级氧化工艺
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）