FUEL
·
2025
·
IF 7.5
Zhuxian Gao,Caihu Li,Jianli Zhang,Xiude Hu,Jingjing Ma,Qingjie Guo
The capture and catalytic performance in integrated CO 2 and utilization (ICCU) potentially contributes to reduce CO 2 emissions with low cost and high efficiency. Breaking through the limitations of conventional dual-functional materials (DFMs). Herein, Fe-CaO/NF self-assembled with nickel foam (NF) as template is designed and prepared via hydrothermal method. CaO is anchored on the Ni-foam skeleton, and Fe-Ni bimetallic sites within the CaO matrix establishes dual-active centers synergizing CO 2 chemisorption and activation. The stability and activity stability of CO 2 capture and in-situ conversion were improved, CO 2 capture capacity is 12.8 mmol/g, CO yield is 9.33 mmol/g, ∼80 % CO 2 conversion is achieved, and 100 % CO selectivity is obtained. It shows good cycle stability and high activity in 12 cycles. The synergistic effect of Fe and Ni on CO 2 adsorption and conversion was confirm by DRIFTS. The interaction between CaO and Fe is weakened by Ni, while the interaction with Fe promotes the conversion of CO 2 . In comparison, the stability and activity of the without O 2 -containing cycle are higher than those of the O 2 -containing. O 2 has a negative effect, leading to competitive adsorption between CO 2 and H 2 O in the CO 2 capture process. The H 2 O molecular layer is formed on the surface of the rod-like structure, and the reduction of the active phase is interference, resulting the regeneration of CaO was decline.
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高影响因子
BULLETIN OF MATERIALS SCIENCE
·
2026
·Vol. 49
·期 1
·34
·
IF 2.1
Zhang Mengmeng,Ren Honghe,Yu Hongchao,He Zhaojun
Fe-doped polypyrrole hollow microspheres were prepared by in situ chemical oxidative polymerization. By ultrasonically dispersing the pyrrole monomer on the surface of a hollow ferroferric oxide hard template, the pyrrole monomer was uniformly distributed on the template surface and within the cavity, enabling simultaneous polymerization of pyrrole and Fe doping. The resulting Fe-doped polypyrrole hollow microspheres exhibited a regular spherical morphology with sizes in the micron range and a specific surface area of 116.7 m 2 /g. The adsorption characteristics of acid chrome blue K (AK) onto the iron-doped polypyrrole were systematically investigated, including the effects of pH, contact time, temperature, and initial dye concentration. The adsorption kinetics showed that equilibrium was reached within 50 min, and the experimental data were well described by the pseudo-second-order kinetic model. Thermodynamic analysis indicated that the adsorption of AK onto Fe-doped polypyrrole hollow microspheres is a spontaneous process. The Fe-doped polypyrrole exhibits advantages such as simple preparation, fast adsorption rate, and recyclability as an adsorbent. It offers an efficient, economical, and environmentally friendly approach, demonstrating strong potential for the treatment of high-concentration printing and dyeing wastewater.
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Journal of Materials Chemistry A
·
2026
·
IF 9.2
Fancang Meng,Huan Wu,Boyu Jia,Kexiang Li,Zhihua Wang,He Zhu,Chao Chen,Qingmin Ji
The development of Fe-N-C electrocatalysts for the oxygen reduction reaction (ORR) is crucial for sustainable energy technologies, yet achieving a high density of atomically dispersed Fe-Nx sites remains a challenge. Herein, we proposed a novel spatial confinement strategy based on the molecular-level infiltration of iron-coordinated, water-soluble fullerene (Fe/wsC60) into self-assembled fullerene microbelts (FMB). The -NH2/-OH functionalized C60s act as molecular metal chelator and nitrogen source, while the flexible FMB framework facilitates their effective permeation. This nanoscale confinement effectively mitigates Fe aggregation during pyrolysis, yielding a catalyst with abundant atomically dispersed curved Fe-N4 sites alongside fine Fe3C nanoparticles. The resultant (Fe/N@FMB) catalyst demonstrates an exceptional ORR activity and stability in alkaline media with a half-wave potential of 0.891 V, surpassing Pt/C and control samples derived solely from wsC60 or FMB. When integrated into a zinc-air battery, it also achieves a higher open-circuit voltage and power density than Pt/C. Theoretical calculations reveal that the curved carbon matrix and adjacent Fe3C synergistically modulate the electronic structure of the Fe-N4 moiety, thereby boosting the ORR kinetics. This work highlights the importance of nanoscale architectural design for precise precursor confinement in developing advanced electrocatalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xiaojing Li,Ya Cui,Liyun Wang,Xingyu Zhou,Jiaqiang Liu,Lingyue Shen,Kaili Lin,Lixia Mao
The vicious cycle of oxidative stress and mitochondrial dysfunction constitutes the critical driver for the imbalance of bone homeostasis in osteoporosis. Excessive reactive oxygen species (ROS) not only directly damage bone marrow-derived mesenchymal stem cells (BMSCs) by impairing mitochondrial function but also trigger persistent inflammatory responses. These factors synergistically lead to the pathological bone microenvironment of osteoporosis, severely hindering bone regeneration process, thereby causing difficulty in osteoporotic bone repair. Herein, we developed Fe-melatonin nanozymes (Fe-Mel NZs), which inhibit excessive oxidative stress by efficiently eliminating ROS, rescue mitochondrial dysfunction, and thereby suppress inflammatory responses and restore the bone microenvironment homeostasis. In vitro experiments demonstrated that Fe-Mel NZs exhibited superoxide dismutase and catalase-like catalytic activities to efficiently scavenge ROS, restore mitochondrial homeostasis, and promote osteogenic differentiation in BMSCs. Meanwhile, Fe-Mel NZs guided macrophages toward M2 polarization, reduced the pro-inflammatory cytokine production, and increased the anti-inflammatory cytokine levels by eliminating excessive ROS, showing a significant regulatory effect on the immune microenvironment, thereby accelerating the bone repair process. Most notably, in vivo evaluations showed that the Fe-Mel NZs significantly promoted osteoporotic bone regeneration. Moreover, high-throughput sequencing results demonstrated that the nanozymes exerted effective therapeutic effects by activating the AMPK signaling pathway, further normalizing the osteoporotic bone microenvironment. Overall, this research presents a nanozyme based on a mitochondrial protection and microenvironment remodeling dual-regulation strategy and offers critical perspective into the development and application of iron-based nanozymes as a potential therapeutic approach for osteoporotic bone repair and other oxidative stress-related diseases.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Shuyue Xie,Yanyan Song,Ruxangul Jamal,Tursun Abdiryim
The development of platinum (Pt)-based electrocatalysts with optimized interfacial structures is crucial to improve the efficiency of direct methanol fuel cells (DMFCs). Here, a Pt-based methanol oxidation reaction (MOR) catalyst (Pt/PProDOT/Fe-NCNT) is constructed by anchoring Pt to poly(3,4-propylenedioxythiophene) (PProDOT) modified and Fe/N co-doped carbon nanotubes (Fe-NCNT) via interfacial engineering. The mass activity (MA) of the Pt/PProDOT/Fe-NCNT catalyst (1258.9 mA mg −1 ) was higher than that of the Pt/Fe-NCNT catalyst (661.5 mA mg −1 ), suggesting that the introduction of PProDOT over Fe-NCNT may enhance the catalytic activity and accelerate the reaction kinetics. The MA value of the Pt/PProDOT/Fe-NCNT catalyst was also superior to that of the commercial Pt/C (282.8 mA mg −1 ) catalyst and many other reported Pt-based catalysts. Experiments and material characterization show that the synthesized Pt/PProDOT/Fe-NCNT catalyst has a unique bamboo-like hollow structure and is cross-linked to form a three-dimensional network. Such a structure can lead to more chemically active sites by the electronegative N atoms in Fe-NCNT, while stabilizing the Pt nanoparticles by the S atoms in PProDOT. Furthermore, the stacking of π-π rings between PProDOT and Fe-NCNT facilitates electron conduction, thereby enhancing catalytic activity and MOR efficiency. Results from this study offer a possible new design of Pt-based catalyst with polymer-modified carbon carriers.
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Surfaces and Interfaces
·
2026
·
IF 6.3
Ziyu Wang,Yequn Liu,Mingjun Cui,Xinyue Li,Jiate Xue,Siming Ren
Carbon dots have attracted wide interest in corrosion fields due to their superior corrosion inhibition performance, low toxicity and tunable surface functionality. In this work, novel N-doped carbon dots (N-CDs) with dual functionalities—corrosion inhibition and corrosion warning were synthesized via a hydrothermal route and applied to protect carbon steel in strong acid environments. The corrosion inhibition performance of the N-CDs was systematically evaluated using electrochemical measurements, weight loss tests, and surface characterization techniques. Among the synthesized samples, N-CDs derived from L -phenylalanine and L -tryptophan (1:1 molar ratio) exhibited outstanding corrosion inhibition to carbon steel in 1M HCl solution, achieving higher corrosion inhibition efficiency of 96.04% at a concentration of 200 ppm in 1M HCl solution. Mechanistic studies revealed that the inhibition process involved both physisorption and chemisorption, conforming to the Langmuir adsorption isotherm. Moreover, the N-CDs displayed pronounced fluorescence quenching toward Fe³⁺ ions, enabling early-stage detection of corrosion onset. This study presents a multifunctional carbon-based nanomaterial that integrates high-performance corrosion protection with real-time corrosion monitoring, offering new prospects for advanced corrosion control in harsh environments.
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高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2020
·
IF 1.648
Yongming Zhang,Jing Zou,Yimeng Luo,Fanghui Wang
Ru-Fe bimetallic alloy nanoparticle catalyst (Ru-Fe/GO) was prepared by chemical reduction method on graphene oxide prepared using Hummers modified method. The structure and morphology of both GO and Ru-Fe/GO were analyzed using X-ray diffraction (XRD), Transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS).The effect of catalyst components on hydrogen generation rate for NaBH4 methanolysis was investigated. When Ru:Fe is 6:1, the catalytic activity is the highest, and the average rate is about 473 mL·min−1·g−1. The effect of temperature, Sodium hydroxide concentration, and sodium borohydride concentration on reaction rate is also discussed, and the activation energy for the methanolysis of sodium borohydride is 59.33 kJ·mol−1 based on the data.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Shidong Zheng,Yufei Shu,Chaoqun Zhu,Beizhao Chen,Youmei Xu,Weiwen Chen,Mengxia Wang,Siyu Cao,Zhipeng Liu,Fan Wang,Yunjiao Han,Zhongying Wang
Effective defluoridation remains a pressing challenge in water purification, particularly in complex water matrices. Cerium dioxide (CeO 2 ) is a promising fluoride adsorbent due to its tunable oxygen-deficient structure and high surface reactivity. However, the underlying mechanisms by which oxygen vacancies (V o ) and surface functionalities cooperatively influence fluoride adsorption remain unclear. Herein, a series of Fe-doped CeO 2 (Fe-CeO 2 ) materials were synthesized to systematically explore the role of Fe-induced V o in enhancing defluoridation performance. Among them, the 9 % Fe-CeO 2 sample exhibited the highest adsorption capacity (43.70 mg/g), achieving a 10.22 % increase over pristine CeO 2 and outperforming multiple benchmark adsorbents in both capacity and kinetics. Spectroscopic characterizations (XRD, XPS, FTIR, Raman) and density functional theory (DFT) calculations revealed a critical balance: moderate Vₒ concentrations not only provided direct adsorption sites but also facilitated hydroxyl group (–OH) formation, both essential for fluoride capture. However, excessive V o concentrations led to surface lattice reconstruction and suppressed –OH generation, resulting in a U-shaped relationship between V o content and adsorption performance. The material also demonstrated high stability under extreme pH conditions, strong selectivity in the presence of co-existing anions, excellent reusability over five adsorption-desorption cycles, and effective fluoride removal (< 1.0 mg/L) under environmentally relevant conditions. These findings offer mechanistic insight into defect engineering and highlight the potential of Fe-CeO 2 as a robust adsorbent for practical water defluoridation applications.
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高影响因子
Water Supply
·
2016
·Vol. 17
·期 3
·665-673
·
IF 0.532
Zang Xueke,Gu Xiaogang,Lu Shuguang,Miao Zhouwei,Zhang Xiang,Fu Xiaori,Fu George Y.,Qiu Zhaofu,Sui Qian
Trichloroethene (TCE) degradation by Fe(II)-activated sodium percarbonate (SPC) in the presence of citric acid (CA) in aqueous solution was investigated. The results indicated that the presence of CA enhanced TCE degradation significantly by promoting HO• generation. The presence of Cl − , HCO 3 − and the initial solution pH appeared to be not negligible on the effect of TCE oxidation, while humic acid had no influence on TCE degradation. The generation of HO• and O 2 − • in the SPC/Fe(II)/CA system was confirmed with chemical probes, and the radical scavenging tests showed that TCE degradation was due to direct oxidation by HO•. Acidic pH condition was favorable for TCE degradation. In summary, this study provided detailed information for the application of the CA-enhanced Fe(II)-activated SPC technique for TCE-contaminated groundwater remediation.
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JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Wenxin Li,Bo Yu,Yang Hu,Xinqiang Wang,Bin Wang,Xiaojuan Zhang,Dongxu Yang,Zegao Wang,Yuanfu Chen
Exploring highly efficient, stable and nonprecious electrocatalysts for both hydrogen and oxygen evolutions is greatly desirable for sustainable energy conversion, but still a huge challenge. Herein, we construct a unique three-dimensional (3D) porous electrocatalyst with hollow (Co,Fe)P nanoframes encapsulated into N,P-codoped graphene aerogel (CFP NFs@NPGA) through one-step in situ encapsulation and selective etching, followed by phosphorization. Due to its uniqure 3D porous nanoarchitecture, CFP NFs@NPGA displays superior electrocatalytic performance. As a highly efficient catalyst for hydrogen evolution reaction , the CFP NFs@NPGA catalyst only needs low overpotential of 155 mV to afford 10 mA cm −2 under alkaline condition. Meanwhile, the hybrid reveals remarkable oxygen revolution reaction activity with a small overpotential of 278 mV to afford 10 mA cm −2 in alkaline electrolyte . When adopted as both cathode and anode in overall water-splitting cell, the hybrid requires only 1.59 V to achieve 10 mA cm −2 with nearly 100% faradaic efficiency, and the experimentally measured H 2 and O 2 gas genenaration rates are about 0.18 and 0.09 mmol h −1 , respectively, showing outstanding long-term stability even over 48 h. The present results manifest that the combination of hollow nanostructure and hetero-atom-doped carbon matrix is an effective strategy to enhance water-splitting performance of transition metal phosphides.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Liang Chen,Dongmei Luo,Zhenghao Wang,Kejing Wu,Lei Song,Hongjiao Li,Shan Zhong,Siyang Tang,Bin Liang
Chemical looping hydrogen generation (CLHG) offers a promising solution for producing H 2 from industrial off-gas, such as blast furnace gas. However, increasing H 2 production capacity of the oxygen carrier (OC) at moderate temperature remains a significant challenge. In this study, a novel Cu-Fe-based OC is tailored for moderate-temperature CLHG from blast furnace gas. The results demonstrates that the tailored OC exhibits a superior H 2 production capacity of 12.99 mmol·g −1 at 550 °C, which is 6.5 times higher than that of Fe 2 O 3 at the same temperature. The addition of Cu leads to the formation of oxygen defects, which facilitate the migration of lattice oxygen, thereby the activity of the OC is enhanced. Furthermore, cyclical experiments demonstrates that O 2 -assisted regeneration strategy can effectively suppress the segregation of Cu during the cycling process, and the tailored OC shows good stability during 10 redox cycles. No additional separation process was required and the purity of the hydrogen was higher than 99%. The findings here open a new avenue for efficient CLHG from industrial off-gas at moderate operation temperature.
研究领域:
能源化学
·
材料科学
·
化学工程
·
工业气体利用
·
氢能技术
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高影响因子
FUEL
·
2015
·
IF 3.52
Weizi Cai,Qian Zhou,Yongmin Xie,Jiang Liu
A wet agglomeration process is developed for preparing Fe-loaded carbon fuel for direct carbon solid oxide fuel cells (DC-SOFCs). This technique involves a simple mechanical mixing of carbon and Fe 2 O 3 powder, along with a proper amount of polyvinylbutyral (PVB) ethanol solution as binder. A DC-SOFC with carbon fuel prepared by this technique is tested and its performance is compared with DC-SOFCs, respectively operated with pure carbon, carbon mechanically mixed with Fe 2 O 3 , and carbon prepared with the conventional impregnation technique. Experimental results show that its output performance is comparable to that of the cell with carbon fuel prepared by the impregnation technique and is better than those of cells, respectively with pure carbon and carbon mechanically mixed with Fe oxide as the fuels. The microstructures of the variety of carbon, the impedance spectra of the corresponding DC-SOFCs are measured and the superiority of the wet agglomeration process in preparing the Fe-loaded carbon for DC-SOFCs is analyzed in detail.
研究领域:
能源材料
·
燃料电池技术
·
材料科学
·
化学工程
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高影响因子
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