APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 3
·e70062
·
IF 0
Guangyu Wu,Geng Li,Jingyi Wang,Shilin Shi,Simeng Guo,Yuwei Pan,Ying Zhang,Jiangang Han,Weinan Xing
The inability to recycle Fenton reagents and a narrow pH range restricts hematite (Fe 2 O 3 ) application in the actual photo-Fenton system. The engineering of surface structures is identified as an effective approach for enhancing the photo-Fenton activity of the material. In this work, three different morphologies (nanosheet, cube, and ring) Fe 2 O 3 materials containing oxygen vacancies (OVs) were synthesized by hydrothermal method, and a novel system for the photo-Fenton degradation of sulfamethazine was examined. In the presence of oxalic acid, the Fe 2 O 3 /oxalic acid heterogeneous catalytic system demonstrated the in situ generation of H 2 O 2 and facilitated Fenton-like reactions. The as-prepared nanosheet-Fe 2 O 3 showed the highest photo-Fenton degradation efficiency. The free radical capture experiment was investigated by using different free radical sacrificial agents, and the results suggested that superoxide radicals were the principal active species involved. Ecotoxicity assessments utilizing toxicity prediction software assessed the reaction intermediates generated during sulfamethazine degradation via a quantitative structure–activity relationship method, indicating that these intermediates exhibited reduced developmental toxicity. The possible pathways of sulfamethazine degradation and mechanism for synergistic degradation sulfamethazine effect between Fe 2 O 3 and oxalic acid were proposed. This research presents an effective strategy for the design and synthesis of Fe 2 O 3 photocatalysts with various morphologies and oxygen vacancies, suitable for application in photo-Fenton catalysis and related environmental contexts.
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Materials
·
2024
·Vol. 17
·期 7
·1501
·
IF 3.1
Xiaohai Wang,Zhuanzhuan Shi,Zhikai Wang,Xiaoshuai Wu
The microbial hybrid system modified by magnetic nanomaterials can enhance the interfacial electron transfer and energy conversion under the stimulation of a magnetic field. However, the bioelectrocatalytic performance of a hybrid system still needs to be improved, and the mechanism of magnetic field-induced bioelectrocatalytic enhancements is still unclear. In this work, γ-Fe2O3magnetic nanoparticles were coated on aShewanella putrefaciensCN32 cell surface and followed by placing in an electromagnetic field. The results showed that the electromagnetic field can greatly boost the extracellular electron transfer, and the oxidation peak current of CN32@γ-Fe2O3increased to 2.24 times under an electromagnetic field. The enhancement mechanism is mainly due to the fact that the surface modified microorganism provides an elevated contact area for the high microbial catalytic activity of the outer cell membrane’s cytochrome, while the magnetic nanoparticles provide a networked interface between the cytoplasm and the outer membrane for boosting the fast multidimensional electron transport path in the magnetic field. This work sheds fresh scientific light on the rational design of magnetic-field-coupled electroactive microorganisms and the fundamentals of an optimal interfacial structure for a fast electron transfer process toward an efficient bioenergy conversion.
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PubMed
高影响因子
Small
·
2024
·
IF 13
Xiao Cen,Junjie Deng,Xuefeng Pan,Rufang Wei,Zhimao Huang,Rong Tang,Shengkai Lu,Rong Wang,Zhihe Zhao,Xinqi Huang
Current clinical strategies for the treatment of temporomandibular joint osteoarthritis (TMJOA) primarily target cartilage biology, overlooking the synergetic effect of various cells and inorganic components in shaping the arthritic microenvironment, thereby impeding the effectiveness of existing therapeutic options for TMJOA. Here, γ-Fe 2 O 3 @TA@ALN magnetic nanoparticles (γ-Fe 2 O 3 @TA@ALN MNPs) composed of γ-Fe 2 O 3 , tannic acid (TA), and alendronate sodium (ALN) are engineered to reconstruct the osteoarthritic microenvironment and mitigate TMJOA progression. γ-Fe 2 O 3 @TA@ALN MNPs can promote chondrocytes’ proliferation, facilitate chondrogenesis and anisotropic organization, enhance lubrication and reduce cartilage wear, and encourage cell movement. Magnetic-responsive γ-Fe 2 O 3 @TA@ALN MNPs also exhibit pH sensitivity, which undergoes decomposition within acidic environment to release ALN on demand. Under a 0.2 T static magnetic field, γ-Fe 2 O 3 @TA@ALN MNPs accelerate the synthesis of cartilage-specific proteins, and suppress catabolic-related genes expression and reactive oxygen species generation, affording additional protection to TMJ cartilage. In TMJOA mouse models, articular injection of γ-Fe 2 O 3 @TA@ALN MNPs effectively alleviates cartilage degeneration and subchondral bone loss in short and long terms, offering promising avenues for the development of therapeutic interventions for TMJOA.
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PubMed
高影响因子
Catalysis Science & Technology
·
2012
·Vol. 2
·期 7
·1455-1462
·
IF 0
Fa-tang Li,Ying Liu,Zhi-min Sun,Ye Zhao,Rui-hong Liu,Lan-ju Chen,Di-shun Zhao
Mixed-phase Fe2O3 was prepared from Fe(NO3)3 and (C2H5)3NHCl via solution combustion. Photocatalytic oxidative desulfurization of dibenzothiophene (DBT) under simulated sunlight irradiation using mixed-phases of α- and β-Fe2O3 as catalysts was investigated. The DBT in the oil phase was extracted into water phase and then photooxidized to CO2 and SO42− by Fe2O3 and O2 dissolved in water. The Fe2O3 containing 36.6% β-Fe2O3 and 63.4% α-Fe2O3 exhibited the highest photocatalytic activity. Sulfur removal of DBT in n-octane was 92.3% for 90 min irradiation under the conditions of V(water) : V(n-octane) = 1 : 1, air flow rate at 150 mL min−1, and Fe2O3 addition at 0.05 g. The kinetics of photooxidative desulfurization of DBT was a pseudo-first-order with an apparent rate constant of 0.0287 min−1 and half-time of 24.15 min. The sulfur content of the actual diesel could be reduced from 478 μg mL−1 to 44.5 μg mL−1 after 90 min. The radical scavengers experiments and terephthalic acid fluorescence technique indicated that ˙OH and O2˙− were the main reactive species in the DBT photocatalytic degradation. A potential photocatalytic desulfurization mechanism using mixed-phase Fe2O3 was proposed.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Hongji Chen,Yan Wu,Huiping Xiao,Hongfei Yin,Qian Fei,Chunyu Yuan,Qiuyu Zhao,Yujin Zhang,Yongzheng Zhang,Woonming Lau
Owing to the low conversion efficiency of Fe 3+ to Fe 2+ during the peroxymonosulfate (PMS) activation process, the design of an efficient Fenton-like catalyst is still a challenge. In this work, 0D/2D Co-doped Fe 2 O 3 /g-C 3 N 4 (CNCFO) composite catalysts were constructed for organic pollutant degradation, where the Co-doping not only boosts the conversion efficiency of Fe 3+ to Fe 2+ , but also acts as active site for PMS activation. Among them, CNCFO2 showed excellent catalytic performance, where 96.4% of MO could be degraded within 45 s. X-ray photoelectron spectroscopy (XPS) confirmed that the cobalt doping promoted the cycle of Fe 3+ /Fe 2+ , which was responsible for the enhanced PMS activation. Meanwhile, the good stability and reusability of CNCFO2 itself provide opportunities for its potential practical applications. Based on systematical characterizations, the Z-scheme photo-Fenton mechanism was proposed. This study offers a fresh perspective on the advancement of designing highly efficient Fenton-like catalyst for applications in the field of environmental purification.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 47
·e56261
·
IF 2.7
Jiayu Lin,Yongbo Hou,Lailong Ding,Yifan Wang,Jinhu Hu,Xishun Qiu,Chao Wu,Mingliang Ma,Wei Gao
Metal–organic frameworks (MOFs) have garnered significant attention in recent years due to their potential application in flame-retardant polymeric materials. In this work, Fe 2 O 3 /ZnFe 2 O 4 /g-C 3 N 4 @ZIF-8 flame retardants were synthesized via solvothermal and calcination techniques, and their elemental composition and morphologies were thoroughly characterized. The flame retardancy of polyurea (PUA) composites incorporating varying dosages of these flame retardants was evaluated using cone calorimetry tests (CCT). The findings demonstrate that the incorporation of Fe 2 O 3 /ZnFe 2 O 4 /g-C 3 N 4 @ZIF-8 significantly enhanced the flame retardant properties of PUA composites. With the addition of 3 wt% of the flame retardant, the peak heat release rate (PHRR), total heat release (THR), total smoke production (TSP), and total CO yield (TCO) of the PUA composites decreased to 890.82 kW/m 2 , 131.34 MJ/m 2 , 12.30 m 2 , and 2.39 g, respectively, reflecting reductions of 33.59%, 18.59%, 29.40%, and 47.93% compared with pure PUA. The flame-retardant mechanism was systematically analyzed in both the condensed and gas phases. This study provides a robust experimental foundation and novel insights that contribute to the development of advanced flame-retardant coating materials.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yuxi Li,Zhuwei Zhu,Ximai Zhang,Fengkuan Ma,Qiaohong Zhang,Chen Chen,Hongying Lü
Selective oxidation of hydrocarbon under mild conditions is one of scientific challenges. In the present work, facet effect was utilized to design an efficient catalytic system of N -hydroxyphthalimide (NHPI) and specific α-Fe 2 O 3 with different preferential crystal facets. Higher ratio of crystalline facet {110}/{104} was identified as a key factor to facilitate the interaction between NHPI molecules and surface of α-Fe 2 O 3 , then realize a higher catalytic activity. Being photo-irradiated with the blue light (455 nm, 3 W) at ambient temperature for 4 h, conversion of 92.2% was obtained for the selective oxidation of ethylbenzene with α-Fe 2 O 3 -T100 that owns more preferential crystalline facets {110}, which is about 1.8 times as high as that (51.0%) being obtained with commercial C-α-Fe 2 O 3 -{104}. The present efficient catalytic system also exhibited good universality for the selective oxidation of a series of other hydrocarbons.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Che Han,Yujie Wang,Jintao Liu,Qiangyi Deng,Hongmei Zhang,Shuang Xu,Conglu Zhang
There is growing attention in the removal of microplastics (MPs) from aquatic environment because of their toxicity and difficulty in degradation. Magnetic Fe 3 O 4 is a potential material for MP removal, however, for fabrication of high-efficiency Fe 3 O 4 -based adsorbents, the alkaline synthesis conditions and weak affinity toward MPs must to be addressed. In this study, we developed magnetic α-Fe 2 O 3 /Fe 3 O 4 hybrid adsorbents (MFes) with engineered affinity sites via a facile one-pot synthesis method. During the material formation process, melamine acted as both a nitrogen source for creating N-modified polar adsorption sites and an inducer for formation of α-Fe 2 O 3 /Fe 3 O 4 phase interfaces. The α-Fe 2 O 3 /Fe 3 O 4 phase interfaces provided additional active sites, as evidenced by the enhanced microplastic adsorption performance. The MFe-1.6–100 achieved 92.3 % polystyrene removal at low adsorbent dosage 0.2 g L −1 and showed rapid adsorption kinetics within 25 min, which is superior to most reported values. After five cycles, the removal efficiency could still retain 90 %. Additionally, MFe-1.6–100 exhibited remarkable ion-tolerance for Cl - and NO 3 - . These performances suggest its potential applicability for MPs capture in aquatic environments.
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高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Ying He,Lidan Ding,Jiabin Zhou,Dan Liu,Ying Zhang
In this study, Fe 2 O 3 /Bi 2 O 3 p-n heterojunction photocatalysts were fabricated to remove tetracycline (TC). The Fe 2 O 3 /Bi 2 O 3 /Vis/PMS system achieved the complete degradation of TC within 80 min, with a reaction rate constant of 0.0553 min −1 , which was 34.5 and 5.8 times higher than individual photocatalytic process and PMS-AOPs, respectively. This superior catalytic performance of Fe 2 O 3 /Bi 2 O 3 is primarily attributed to two key aspects. Firstly, forming a heterojunction promotes efficient segregation of photogenerated electron–hole pairs, wherein holes (h + ) directly activate PMS. Secondly, PMS simultaneously functioned as an electron acceptor to generate SO₄• − , accelerating the Fe 3+ /Fe 2+ redox cycle while inhibiting electron-hole recombination. This study confirmed the dual advantages of enhanced radical generation through PMS-assisted photocatalysis synergistic effects and improved charge separation via heterojunction engineering.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Huanhuan Wu,Huihui Ding,Jun Ma,Xiang Li,Shuangshuang Huai,Chengming Zhang,Ping Li,Jingjing Xia,Xiaolong Fang,Xiufang Wang
Limited charge transfer and slow oxygen evolution (OER) kinetics significantly impede the practical realization of photoanodes for photoelectrochemical (PEC) water splitting. Here, pn-type-Fe 2 O 3 homojunction photoanode catalysts with P active sites are designed by doping phosphorus (P) into outer lattice of n-type Fe 2 O 3 nanorods (pn-P-Fe 2 O 3 ). The optimized pn-P-Fe 2 O 3 photoanode shows the maximum photocurrent density of 2.61 mA/cm 2 at 1.23 V RHE , and the value is 6.4 times greater than that of pristine Fe 2 O 3 . Experimental and theoretical results clearly show that the P–N homogeneous junctions constructed in Fe 2 O 3 through P-doping increase active sites for H 2 O adsorption and activation, reduce OER reaction energy barrier, and promote effective separation of photogenerated electron-hole pairs and water splitting kinetics. This not only makes the photoelectric water decomposition performance outstanding, but also produces excellent durability. This work provides a novel simple and environmentally friendly strategy for designing effective photoanodes for PEC water splitting.
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高影响因子
Nature Energy
·
2021
·Vol. 6
·期 6
·614-623
·
IF 60.858
Gao Ruijie,Wang Jian,Huang Zhen-Feng,Zhang Rongrong,Wang Wei,Pan Lun,Zhang Junfeng,Zhu Weikang,Zhang Xiangwen,Shi Chengxiang,Lim Jongwoo,Zou Ji-Jun
Platinum is the archetypal electrocatalyst for oxygen reduction—a key reaction in fuel cells and zinc–air batteries. Although dispersing platinum as single atoms on a support is a promising way to minimize the amount required, catalytic activity and selectivity are often low due to unfavourable O 2 adsorption. Here we load platinum onto α-Fe 2 O 3 to construct a highly active and stable catalyst with dispersed Pt–Fe pair sites. We propose that the Pt–Fe pair sites have partially occupied orbitals driven by strong electronic coupling, and can cooperatively adsorb O 2 and dissociate the O=O bond, whereas OH* can desorb from the platinum site. In alkaline conditions, the catalyst exhibits onset and half-wave potentials of 1.15 V and 1.05 V (versus the reversible hydrogen electrode), respectively, mass activity of 14.9 A mg −1 Pt (at 0.95 V) and negligible activity decay after 50,000 cycles. It also shows better performance than 20% Pt/C in a zinc–air battery and H 2 –O 2 fuel cell in terms of specific energy density and platinum utilization efficiency.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wendi Zhu,Wei Gao
In this study, Ni/MWCNTs/CuO/Fe 2 O 3 composite nanomaterials were synthesised by a simple hydrothermal method, using Fe 2 O 3 as a substrate material and taking advantage of the excellent properties of carbon nanotubes, which possess a large surface area, and the catalytic ability of Ni. These nanocomposites are easy to synthesise and cost-effective. Compared to CuO/Fe 2 O 3 and MWCNTs/CuO/Fe 2 O 3 , Ni/MWCNTs/CuO/Fe 2 O 3 exhibits higher sensitivity and response values for H 2 S at room temperature. In particular, the best performance was achieved when the content of Ni/MWCNTs was 5 wt%. The sensing material, featuring a short response/recovery time (4 s/10 s), a low lower limit of detection (10 ppb), a high response value (100 ppm, 125), and high selectivity, is an excellent detection material for H 2 S. The enhanced performance of the composites can be attributed to several factors. Firstly, the formation of multiple heterojunctions and Schottky barriers facilitates electron transfer. Secondly, the interconnection of the conductive backbones of the MWCNTs increases the area of mutual contact, thereby providing more active sites for the reaction. Lastly, the highly efficient electrocatalysis of Ni reduces the activation energy of the reaction, accelerating the reaction kinetics, which in turn improves the gas-sensitive performance of the sensing materials for H 2 S.
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高影响因子
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