ACS Nano
·
2025
·
IF 16
Hengdong Ren,Chensi Zhou,Ka Wang,Ximing Zhang,Lei Feng,Wenqing Wei,Yuqing Sun,Yukang Liu,Jun Dai,Xiaobing Xu,Zhiyong Zhang,Xinglong Wu
Interface polarization (one of the slow polarizations) is considered the primary mechanism driving microwave absorption (MA), but limitations in material composition and microstructure design often lead to weak interfacial polarization relaxation. In this work, we developed an interesting heterostructure consisting of carbon nanotube-encapsulated α-Fe2O3 nanocolumns (CNTs@α-Fe2O3). The curvature effects of CNTs induce a built-in electric field between CNTs and α-Fe2O3 nanocolumns, facilitating effective interface polarization. Under microwave irradiation, electron accumulation at the interfaces, driven by the energy-level mismatch between the two materials, further strengthens interface polarization, leading to a highly efficient MA performance. This heterostructured material achieves a minimum reflection loss of −74.1 dB at a thickness of 1.8 mm and an effective absorption bandwidth (reflection loss ≤ −10 dB) of 5.2 GHz (11.9 ∼ 17.1 GHz) at a thickness of only 1.5 mm. X-ray photoelectron spectroscopy and Raman scattering show a distinct blueshift in the Fe 2p binding energy and the A1g mode energy (exclusively associated with Fe atom vibrations), suggesting substantial charge transfer and redistribution at the interface associated with enhanced interface polarization. This work provides insights into interface polarization through the strategic design of energy levels and materials.
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DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Kaiwen Wu,Jichao Shi,Daqing Wang,Honghao Ni,Runping Jia,Yufeng Liu,Lin Lin,Dandan Wu,Shufang Chang,Yaqi Wang,Qing Xin
Magnetic iron oxide is a typical narrow-band gap semiconductor photocatalyst, but its inherent magnetic aggregation effect and high electron–hole recombination rate seriously affect its photocatalytic performance. Here, α-Fe2O3/SiO2 composite aerogels were prepared by combustion technology for the first time. The unique structure of α-Fe2O3/SiO2 composite aerogels with amorphous silica coated with nanocrystalline iron oxide was confirmed. The composite aerogels exhibited a high specific surface area (479 m2 g−1 when calcined at 500 °C), so that they have excellent adsorption properties for organic pollutants (MB, RhB and TC) and Cr(VI). The composite aerogels with a Fe : Si molar ratio of 1 : 2 showed the best visible light photocatalytic properties for MB, RhB and TC. Based on the study of the band gap width, photocurrent density, transient photocurrent response, impedance of photocatalysts, and the unique structure of the composite aerogels, the mechanism of photocatalytic enhancement of composite aerogels was proposed. Finally, the mechanism of the preparation of α-Fe2O3/SiO2 composite aerogels by combustion synthesis was analyzed. It is a potential technology for preparing high performance composite aerogel photocatalysts by high efficiency combustion technology.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Velu Manikandan,Duraisamy Elango,Velu Subash,Palaniyappan Jayanthi,Mysoon M. Al-Ansari,Saurav Dixit,Subhav Singh,Seemaisamy Revathi,Sutikno Sutikno,Kwang Soup Song
The development of effective and cost-efficient photocatalysts is crucial for wastewater treatment. This study aimed to synthesize and evaluate ZnO/Fe 2 O 3 nanocomposites (ZnFe NCs) as novel photocatalysts for the removal of organic contaminates. We synthesized ZnFe NCs using a simple, environmentally friendly microwave-assisted method. Characterization was conducted using HR-TEM, SEM-EDS, XPS, and X-ray diffraction. The photocatalytic performance was evaluated with methylene blue (MB) and orange II (O-II) dyes, showing that ZnFe NCs with H 2 O 2 achieved 98.2 % dye removal under 120 min of sunlight. This performance surpassed that of controls, including ZnO, Fe 2 O 3 , and ZnO/Fe 2 O 3 alone. The study also determined optimal conditions for the photocatalysts, demonstrating enhanced photocatalytic activity. Antibacterial tests showed inhibition zones of 22 mm against Staphylococcus aureus ( S. aureus ) and 20 mm against Escherichia coli ( E. coli ) at 100 mg/mL. ZnFe NCs show dual potential for photocatalytic degradation and antimicrobial activity, ideal for wastewater treatment and microbial control.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Bowen Zhang,Lulu Guo,Jiayue Xin,Guangrui Xiang,Shengxuan Xu,Yu Gong,Xiaohan Sun,LeTian Zhao,Ke Wu,Fan Li,Zhimin Yang
The development of self-powered humidity sensors featuring rapid response, low hysteresis, and dual-mode signal output is highly anticipated in healthcare monitoring, wearable electronics and human-machine interaction. Here, we present a hydrogen bonding-mediated self-assembly strategy to synthesize α-Fe 2 O 3 -decorated reduced graphene oxide (Fe 2 O 3 -rGO) hybrids for high-performance dual-mode humidity sensing. In impedance mode, the sensor demonstrates a broad detection range (11–98 % RH), a response value of 71.1 at 98 % RH, fast response/recovery times (1 s/5 s), and minimal hysteresis (3.7 %). The sensing mechanism, elucidated through complex impedance spectroscopy and water adsorption isotherms, reveals synergistic proton transport and p-n heterojunction effects at the α-Fe 2 O 3 -rGO interface. Notably, the sensor also operates in a self-powered mode, generating an ultrahigh output voltage (1.1 V at 98 % RH) through humidity-triggered galvanic reactions, enabling capacitor charging and light-emitting diode (LED) driving. Practical applicability is demonstrated through real-time respiratory monitoring, Morse code communication, and non-contact finger motion tracking, underscoring its utility in wearable electronics. This work provides a scalable and cost-effective approach to designing multifunctional humidity sensors with broad applicability in smart systems and healthcare.
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高影响因子
RSC Advances
·
2012
·Vol. 2
·期 13
·5571-5579
·
IF 0
Longcheng Xu,Jianming Pan,Jiangdong Dai,Zhijing Cao,Hui Hang,Xiuxiu Li,Yongsheng Yan
This paper reports a molecularly imprinted polymers (MIPs) based fluorescence sensor which is synthesized by grafting MIP layers on the surface of ZnO nanorods embedded γ-Fe2O3 nanoparticles via activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP). Methacrylic acid (MAA, functional monomer), 3-(trimethoxysilyl)propyl mathacrylate (MPS) modified γ-Fe2O3 (γ-Fe2O3/MPS, assistant magnetic monomer) and ethylene glycol dimethacrylate (EGDMA, cross-linking monomer) were co-polymerized in anisole at 313 K in the presence of sulfamethazine as a template molecule. Sulfamethazine was then solvent-extracted to obtain ZnO-grafted molecularly imprinted polymers (ZnO-MIPs). ZnO-MIPs were characterized by FE-SEM, TEM, FT-IR, TGA/DSC, VSM, fluorescence spectroscopy and Raman spectroscopy. It was observed that sulfamethazine can quench the luminescence of ZnO-MIPs in a concentration-dependent manner that can be described by a Stern–Volmer-type equation. ZnO-MIPs were used to determine sulfamethazine in a spiked pork sample with good recognition ability. This study therefore demonstrates the potential application in the recognition and separation of antibiotics based on molecularly imprinted polymers.
研究领域:
材料科学
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分析化学
·
生物医学工程
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DOI
Journal of the Australian Ceramic Society
·
2022
·Vol. 59
·期 1
·179-185
·
IF 1.741
Liu Yupu,Wang Shu,Yin Jianan,Li Xin
Based on the construction of type II heterojunction, the one-pot hydrothermal method was employed to synthesize Fe 2 O 3 /WS 2 composites with flower-like structures, which performed significant photocatalytic activities compared with the bare components. The systemic characterizations were employed to reveal the type II heterojunction photogenerated electron transfer mechanism and they further illustrated the path for electron–hole transfer and separation under the effect of heterojunction. Afterward, the photocatalytic properties of the catalysts were evaluated by degrading organic methylene blue and toxic Cr (VI) under simulated solar-driven irradiation. Among those, the best high-efficiency Fe 2 O 3 /WS 2 photocatalyst (2WF) displayed significant photocatalytic properties on pollution degradation in detail, with the Cr (VI) photoreduction rate of 0.35 μmol·min −1 ·g −1 cat. and the MB photooxidation rate of 0.27 μmol·min −1 ·g −1 cat. , respectively. The designed photocatalysts have integrated the three aspects of photocatalytic efficiencies, including the visible light response, prolonged photogenerated carrier lifetime, and sufficient surface active sites due to the amount of surface defects, therefore, this work provides more insights into the utilization of green energy for environmental treatment by heterostructured catalysts.
研究领域:
环境科学
·
材料科学
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高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Zhe Xu,Haoyu Wang,Yunzhou Wen,Wenchao Li,Chuyu Sun,Yuting He,Zhan Shi,Lang Pei,Yongda Chen,Shicheng Yan,Zhigang Zou
For photoelectrochemical (PEC) water splitting, the interface interactions among semiconductors, electrocatalysts, and electrolytes affect the charge separation and catalysis in turn. Here, through the changing of the bath temperature, Co-based oxygen evolution catalysts (OEC) with different crystallinities were electrochemically deposited on Ti-doped Fe2O3 (Ti–Fe2O3) photoanodes. We found: (1) the OEC with low crystallinity is highly ion-permeable, decreasing the interactions between OEC and photoanode due to the intimate interaction between semiconductor and electrolyte; (2) the OEC with high crystallinity is nearly ion-impermeable, is beneficial to form a constant buried junction with semiconductor, and exhibits the low OEC catalytic activity; and (3) the OEC with moderate crystallinity is partially electrolyte-screened, thus contributing to the formation of ideal band bending underneath surface of semiconductor for charge separation and the highly electrocatalytic activity of OEC for lowering over-potentials of water oxidation. Our results demonstrate that to balance the water oxidation activity of OEC and OEC–semiconductor interface energetics is crucial for highly efficient solar energy conversion; in particular, the energy transducer is a semiconductor with a shallow or moderate valence-band level.
研究领域:
材料科学
·
电化学
·
可再生能源
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高影响因子
Nanotoxicology
·
2023
·
IF 5
Xue Zhang,Fei Kong,Tian Wang,Xin Huang,Wanqing Li,Meichen Zhang,Tao Wen,Jian Liu,Yu Zhang,Jie Meng,Haiyan Xu
Iron oxide nanoparticles (IONPs) are mostly intended to be administrated intravenously, understanding the interaction of IONPs with vascular endothelial cells is extremely crucial for developing safe application regimes of IONPs. In this work, interactions of three kinds of IONPs to endothelial cells were investigated both in human umbilical vein endothelial cells (HUVECs) and in healthy mice. Both meso-2,3-dimercaptosuccinic acid (DMSA) coated Fe3O4 NPs (DMSA-Fe3O4 NPs) and DMSA-Fe2O3 NPs induced cell growth inhibition, while polyglucose sorbitol carboxymethyether coated Fe2O3 NPs(PSC-Fe2O3 NPs) did not. The PSC coating inhibited the cellular uptake of the IONPs. Both DMSA-Fe3O4 and DMSA-Fe2O3 NPs induced ferroptosis of HUVEC through upregulating phospholipid peroxides, which could be inhibited by typical ferroptosis inhibitors ferrostatin-1, Trolox and deferoxamine. Moreover, transforming growth factor beta 1 (TGFβ1) was upregulated by DMSA-Fe3O4 NPs at protein and gene level. The inhibitor of TGFβ1 receptor LY210 could reduce the effect. When being intravenously injected in mice, DMSA-Fe3O4 NPs were observed locating in the liver, increased the levels of lipid peroxidation (4-hydroxynonenal), acyl-CoA synthetase long-chain family member 4(ACSL4) and TGFβ1, indicating ferroptosis occurrence in vivo. The ferroptosis of vascular endothelial cells in exposure with IONPs depended on the surface coating and core chemistry of the NPs. Both DMSA-Fe3O4 NPs and DMSA-Fe2O3 NPs could induce the ferroptosis of endothelial cells, while PSC-Fe2O3 NPs did not induce ferroptosis and apoptosis possibly due to the very low cellular uptake. DMSA-Fe3O4 NPs and TGFβ1 formed feedforward loop to induce ferroptosis.
研究领域:
纳米技术
·
细胞生物学
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药理学
·
毒理学
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Qingdong Qin,Ting Liu,Jiaxuan Zhang,Rui Wei,Shijie You,Yan Xu
Hematite (α-Fe 2 O 3 ) has been commonly used as an eco-friendly catalyst for peroxymonosulfate (PMS) to generate free radicals (SO 4 •- and/or •OH). However, the activation efficiency of PMS relies heavily on the conversion of Fe(III) to Fe(II) that is slow and rate-limiting. In this study, oxygen vacancies enriched α-Fe 2 O 3 was prepared from thermally treated goethite (α-FeOOH) and employed as a PMS activator. Systematic characterization demonstrated that α-Fe 2 O 3 with most abundant oxygen vacancies could be obtained by heating α-FeOOH at 300 °C. The as-prepared α-Fe 2 O 3 exhibited excellent catalytic activity in activation of PMS for oxidation of sulfamethoxazole (SMX, k = 0.04 min −1 ). The SMX degradation rate was found to be positively correlated with the concentration of oxygen vacancies. Quenching experiments, EPR, LC/MS and XPS analysis revealed that singlet oxygen ( 1 O 2 ) was the predominant reactive oxygen species . The effects of pH, PMS dosage, catalyst loading, temperature, and anions on SMX degradation were comprehensively investigated. Moreover, the plausible degradation pathways of SMX in the α-Fe 2 O 3 /PMS system were proposed. This work not only provides a valuable insight into the mechanism of PMS activation by α-Fe 2 O 3 but also establishes a new strategy for the design of more efficient and practical iron-based catalyst for PMS activation.
研究领域:
环境科学
·
催化化学
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Shiyang Fu,Yuqing Shi,Guowei Yu,Xiao Liang,Nan Gao,Jing Zhang
Co 3 O 4 /Fe 2 O 3 p–n heterojunctions were prepared hydrothermally. • CF-5 shows a 5.6-fold response at a lower optimal temperature. • DFT reveals charge redistribution enhancing n-butanol adsorption. To selectively detect volatile organic compounds at low operating temperatures are highly desirable for industrial safety and environmental monitoring. Herein, we report the high-performance n-butanol gas sensors via interfacial engineering of Co 3 O 4 /Fe 2 O 3 p–n heterojunction composites. Hierarchical architectures composed of Fe 2 O 3 nanoparticles uniformly anchored on Co 3 O 4 nanorods were synthesized through a facile hydrothermal calcination strategy. Among the prepared samples, the optimized composite delivers a markedly enhanced sensing response of 23.08 toward 100 ppm n-butanol, representing a 5.6-fold improvement compared with pristine Co 3 O 4 , and simultaneously reducing the optimal operating temperature to 110°C. The mechanism analyses reveal pronounced interfacial charge transfer from Fe 2 O 3 to Co 3 O 4 , which induces band bending and built-in potential barriers that sensitively regulate carrier transport. The formation of heterointerfaces also significantly enriches chemisorbed oxygen species, thereby accelerating surface oxidation reactions with n-butanol molecules. As a result, the sensor exhibits outstanding selectivity against common interfering gases, fast response/recovery dynamics (42/36 s). Density functional theory calculations further elucidate that the heterojunction facilitates stronger adsorption of n-butanol and its oxidation intermediates, enhanced charge transfer, and favorable electronic-state redistribution near the Fermi level. This work highlights interfacial electronic engineering as an effective strategy for developing energy-efficient and highly reliable metal-oxide gas sensors. Download: Download high-res image (237KB) Download: Download full-size image
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Jingjing Guo,Yanfang Lan,Tongtong Wu,Juan Wang,Yuejin Zhang,Chen Sun,Weixing Cao
To enhance biogas production from food waste (FW) via anaerobic digestion (AD), batch experiments were conducted at 36.5 ± 0.5°C using Fe 2 O 3 nanoparticles (Fe 2 O 3 NPs), 3D-printed reticulated rumen biomimetic carrier (BC), and Fe 2 O 3 NPs loaded on BC (Fe 2 O 3 NPs@BC). Results demonstrated that all additives significantly enhanced AD performance, along with the Fe 2 O 3 NPs achieved the highest cumulative methane yield of 378.7 mL/g VS, representing a 24.8% increase relative to the Control group. The additives may act as electron shuttles via Fe 3+ /Fe 2+ cycling and appear to enhance electron transport system activity and system stability. Microbial analysis showed the additives increased methanogenic archaeal diversity. The dominant bacterial phyla were Firmicutes (31%∼38%) and Bacteroidota (31%∼51%), and Fe 2 O 3 NPs increased Bacteroidota by 65.0% compared with the Control. Methanobacterium and Methanosaeta dominated methanogens and drove hydrogenotrophic and acetoclastic methanogenesis. This study reveals mechanistic insights into nanomaterial-biocarrier interactions in food waste energy conversion.
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高影响因子
CORROSION SCIENCE
·
2026
·
IF 10.3
Haojie Yu,Hongda Deng,Guizhuo Li,Yizhong Huang
A robust all-inorganic S-scheme Cu 3 SnS 4 (CTS4)/ α-Fe 2 O 3 composite nanotube array photoanode, demonstrating superior photoelectrochemical cathodic protection (PECCP) performance, was fabricated by in-situ growing α-Fe 2 O 3 on carbon steel through anodization, followed by anchoring CTS4 nanoparticles onto the vertically aligned nanotubes using a hydrothermal method. The construction of the CTS4/α-Fe 2 O 3 S-scheme heterojunction broaden visible light absorption capability and optimize charge carrier separation simultaneously, enabling significantly enhancing the prevention of Q235 carbon steel corrosion. Under visible light, the optimized composite on Q235 steel coupling led to a 480 mV OCP drop (vs. Ag/AgCl) and a photocurrent density of 32 µA/cm². A synergistic effect between the electron transport channels in nanotube arrays and the charge separation induced by the S-scheme mechanism underpins the substantial performance improvement. This work provides new insights into the design of highly efficient S-scheme photoanodes for stable and sustainable marine corrosion protection.
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高影响因子
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