CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Taotao Liang,Xiaogang Guo,Binfang Yuan,Shuying Kong,Huisheng Huang,Daoling Fu,Fulan Zhang,Jianhua Xu,Xueming Li
The design of functional anti-wetting ceramic coatings is always a bottleneck restricting the development of ceramic techniques. This study proposes a liquid phase synthesis method to fabricate α-Fe 2 O 3 (III) ceramic powders with promising applications and introduces a facile electrophoretic deposition (EPD) technique to construct the corresponding functionalized hydrophobic films – superhydrophobic functionalized α-Fe 2 O 3 ceramic films (SFOFS) with roughly even distribution and a high water contact angle (CA) of 169°±1° – followed by heat posttreatments. The microtopography and crystalline structures of the product were investigated by FESEM, EDX , and XRD techniques. The EPD controllability of SFOFS was studied by adjusting the EPD time and the applied field strengths . In addition, the SFOFS show excellent long-term anti-wetting properties for twenty-four months after undergoing a series of tests, including soaking, water droplet impacting, immersion by droplets with different surface tensions and exposure to different gases and relative humidity conditions, etc. This study substantially helps the design of other kinds of functional anti-wetting films through the proposed convenient method beyond the oxide limit.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Yang Wu,Yu Wang,Zhiqiang Lin,Yingying Wang,Yao Li,Shengwei Liu,Xuchun Gui,Xin Yang
Tetrabromobisphenol A (TBBPA) is one most widely used brominated flame retardant worldwide. In this study, a three-dimensional α-Fe 2 O 3 /amino-functionalization carbon nanotube (α-Fe 2 O 3 /CNT-N) sponge was synthesized and applied for adsorption removal of TBBPA from aqueous solution. The maximum adsorption capacity of TBBPA on the α-Fe 2 O 3 /CNT-N sponge was 41.35 ± 6.09 mg·g −1 at 303 K and pH 7.0 ± 0.1 and the adsorption capacity was maintained in the pH range of 3–7. The adsorbed TPPBA on the α-Fe 2 O 3 /CNT-N sponge can be easily degraded after adding peroxymonosulfate (PMS) to generate hydroxyl and sulfate radicals. The functional groups such as CONH 2 , C O and π–π ∗ bonds played an important role in the activation of PMS. The α-Fe 2 O 3 /CNT-N sponge may be considered to use for water treatment due to its good adsorption capacity, easy separation from water and simple regeneration procedures.
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
SENSORS AND ACTUATORS B-CHEMICAL
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2019
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IF 6.393
Xiao Wang,Tongkai Wang,Guangkuo Si,Yang Li,Shouwei Zhang,Xiaolong Deng,Xijin Xu
Surface oxygen vacancy defects (OV) are regarded to be beneficial to the gas sensing behavior by significantly improving the carrier density and providing more oxygen adsorption sites. In this work, Ce-doped α-Fe 2 O 3 composites with abundant OV defects were synthesized using an oil bath method assisted with annealing treatment. Morphological characterization results indicate that the lamellar architecture of α-Fe 2 O 3 is transformed to nanospheres composed of massive nanoparticles with small sizes (7–9 nm) after introducing Ce elements. Gas sensing results show that the FeCe10 (Fe/Ce = 10:1) sensors exhibit enhanced acetone sensing response of 26.3–100 ppm gas at the operating temperature of 220 °C toward that of pure α-Fe 2 O 3 . Most importantly, X-ray photoelectron spectroscopy and electron spin resonance spectroscopy results confirm that the sensing responses of Ce-doped α-Fe 2 O 3 sensors are directly related to the OV defects, that is, the larger the quantity of the OV defects, the higher the sensing response. The unpaired electrons trapped in OV defects can provide more active sites for adsorption of oxygen and acetone molecules, resulting in a thicker depletion layer and a higher potential barrier. Our work highlights the decisive role of OV defects in gas sensors, which can also provide a rational approach to boost the sensing performance.
研究领域:
材料科学
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传感器技术
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纳米材料
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表面化学
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半导体物理
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DOI
高影响因子
Journal of Materials Chemistry A
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2014
·Vol. 2
·期 33
·13705-13712
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IF 0
Zewen Fu,Tengfei Jiang,Lijing Zhang,Bingkun Liu,Dejun Wang,Lingling Wang,Tengfeng Xie
In this paper, we present the fabrication of Ti-doped α-Fe2O3 and surface treatment with Al3+ for application as a photoanode in photoelectrochemical water splitting. The Ti-doped α-Fe2O3 with Al3+ treatment shows a 100 mV cathodic shift of the onset potential and a notable improvement of the photocurrent density. The samples were characterized by SEM, TEM, HRTEM, XRD, Raman, UV-vis and XPS to obtain the information after surface treatment. Based on electrochemistry and photoelectrochemistry techniques, it appears that surface treatment with Al3+ passivates the surface states and decreases the accumulation of charge at the surface of Ti–Fe2O3. The results show that Ti-doped Fe2O3 with Al3+ surface treatment can be used as an efficient photoanode for photoelectrochemical water splitting.
研究领域:
材料科学
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能源科学
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DOI
NANOTECHNOLOGY
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2020
·Vol. 31
·期 13
·135403
·
IF 3.551
Taowen Dong,Ting Deng,Xianyu Chu,Tingting Qin,Haoxiang Wang,Zizhun Wang,Wei Zhang,Weitao Zheng
Earth-abundant Fe2O3 is a promising material for the negative electrode of supercapacitors by virtue of its wide potential windows. However, the unsatisfactory electrical conductivity and poor ionic diffusion rate within Fe2O3 results in degraded electrochemical performance. In this work, to address these issues, we demonstrate an easy method to synthesize Fe-based zeolitic imidazolate framework (Fe–ZIF) derived α–Fe2O3@C with remarkable supercapacitive properties. The as-obtained α–Fe2O3@C electrode, with the particular benefit of dispersed distribution of carbon, enabling fast electrochemical response, presents a prospective specific capacitance of 161 Fg−1 at a current density of 1 Ag−1. Furthermore, by using the α–Fe2O3@C architecture as the negative electrode, we fabricated a supercapacitor with Na0.5MnO2 as the positive electrode. Our supercapacitor shows a high energy density of 25 Whkg−1, while the corresponding power density is 2400 Wkg−1 at a current density of 2 Ag−1.
研究领域:
材料科学
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能源存储与转换
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产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Jirong Bai,Haiyang Xu,Gang Chen,Wenhua Lv,Zhijiang Ni,Zhilei Wang,Jiaying Yang,Hengfei Qin,Zheng Zheng,Xi Li
α-Fe 2 O 3 /porous g-C 3 N 4 (α-Fe 2 O 3 /PCN) photocatalysts were fabricated via a facile and green method. Structural characterization indicated α-Fe 2 O 3 nanoparticles were successfully loaded onto PCN. The α-Fe 2 O 3 /PCN nanocomposites were proven durable with significantly enhanced photocatalytic activity for Rhodamine B photodegradation than the single components under visible light irradiation. The improved photoactivity was mainly attributed to the broadened visible light absorption, enriched active sites, and formation of α-Fe 2 O 3 /PCN heterojunction that addressed the recombination of photoinduced electrons and holes. The α-Fe 2 O 3 /PCN hybrids also showed high recyclability and chemical stability.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Shaowei Yao,Zhiqiang Shi,Xingxiang Zhang
A new α-Fe 2 O 3 porous microrods using as an anode for lithium-ion batteries (LIBs) were prepared by a facile hydrothermal reaction and heat treatment at different temperature. The effect of calcination temperature on the structure, morphology and electrochemical performance of α-Fe 2 O 3 microrods anode materials has been systematically investigated. The results demonstrate that the calcination temperature can affect mesoporous distribution and the primary particle size of α-Fe 2 O 3 microrods and then affect the electrochemical performance. The α-Fe 2 O 3 microrods calcined at 700 °C (F700) outperformed other samples in terms of reversible capacity, cyclability, and rate capability. F700 exhibits excellent reversible capacity of 1083 mAh g −1 in the first cycle and 733 mAh g −1 after 100 cycles at 100 mA g −1 in the range of 0.01–2.5 V. Therefore, α-Fe 2 O 3 microrods can be one promising anode materials for LIBs.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2016
·
IF 7.145
Anran Chen,Liang Xu,Xiaojing Zhang,Zhimao Yang,Shengchun Yang
α-Fe2O3 nanoparticles (NPs) with morphologies varying from shuttle to drum were synthesized through an anion-assisted and surfactant-free hydrothermal method by simply varying the ratios of ethanol and water in solvent. Control experiments show that the structural evolution can be attributed to a small-molecular-induced anisotropic growth mechanism in which the growth rate of α-Fe2O3 NPs along the a-, b-, or c-axis was well-controlled. The detailed structural analysis through the high-resolution transmission electron microscope (HRTEM) indicated that shuttle-like Fe2O3 NP surface was covered by high-density atomic steps, which endowed them with the enhanced adsorption and sensor ability toward dopamine (DA). The XPS characterizations indicated that the percentages of the OC component follow the order of shuttle-like Fe2O3 (S-Fe2O3 for short) > pseudoshuttle-like Fe2O3 (Ps-Fe2O3 for short) > polyhedron-like Fe2O3 (Ph-Fe2O3 for short) > drum-like Fe2O3 (D-Fe2O3 for short). Benefits from these structural advantages, the S-Fe2O3 NPs–Nafion composite electrode exhibited remarkable electrochemical detection ability with a wide liner range from 0.2 μM to 0.107 mM and a low detection limit of 31.25 nM toward DA in the presence of interferents.
研究领域:
材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Yaqing Zhang,Zhimin Yang,Liang Zhao,Teng Fei,Sen Liu,Tong Zhang
As promising sensing materials, reduced graphene oxide (RGO)-based nanomaterials have drawn considerable attention in the fields of gas monitoring owing to their low operating temperature. However, constructing RGO-based room-temperature gas sensors possessing ppb-level limit of detection with high sensitivity remains challenging. In this work, a series of highly sensitive NO 2 sensors were fabricated using α-Fe 2 O 3 and SnO 2 co-decorated RGO hybrids (designated as α-Fe 2 O 3 /SnO 2 -RGO) as sensing materials. They were rationally synthesized by a one-pot hydrothermal method. Compared to SnO 2 modified RGO hybrids (SnO 2 -RGO with bandgap of 3.88 eV), the bandgap energy of α-Fe 2 O 3 /SnO 2 -RGO hybrids (3.53 eV) was reduced by adding α-Fe 2 O 3; the narrower bandgap facilitated the sensing materials to release more electrons and form more oxygen ions at room temperature. Besides, the high carrier migration of RGO, which served as continuous phase, identical structure with ultrasmall particle size of α-Fe 2 O 3 and SnO 2 (about 3–6 nm), and abundant chemisorbed oxygen species on the surface (20.8%) of the sensing materials, as well as their suitable bandgap (3.53 eV) in the sensing materials, significantly improved NO 2 response at room temperature. Among the sensors fabricated, α-Fe 2 O 3 /SnO 2 -RGO-15-based NO 2 sensor had the highest response of 7.4 with a short response time of 59 s towards 1 ppm NO 2 ; it could even reach a response of 2.6 towards 100 ppb NO 2 . Notably, α-Fe 2 O 3 /SnO 2 -RGO-15 sample has excellent capability to recognize NO 2 , where the response value (7.4) towards 1 ppm NO 2 is about 7 times higher than that of 100 ppm ammonia and common volatile organic compounds (formaldehyde, toluene, ethanol and acetone). Such NO 2 sensor has superior repeatability with negligible response deviation towards 1 ppm NO 2 for four reversible cycles. This makes it to have a great potential application in the field of NO 2 detection.
研究领域:
材料科学
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环境监测
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 3
·2699-2707
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IF 2.22
Zhang Jianxia,Li Haiying,Li Yu,Zhao Bing,Ju Xiangnan,Chen Wenbin,Lu Bingliang,Zeng Xiangan,Liu Li
This paper reports the preparation of an excellent acetone gas-sensitive material consisting of a Eu 3+ -decorated α-Fe 2 O 3 microflower (EFM) composite film by a simple hydrothermal and calcination method. For comparison, pure α-Fe 2 O 3 microflowers (PFM) are prepared with the same method. Scanning electron microscopy (SEM) images show that the samples are a loose 3D flower-like structure with many voids surrounded by many thin nanosheets. The structure of the samples was investigated using X-ray diffraction and X-ray photoelectron spectroscopy (XPS). The PFM and EFM gas sensors were systematically tested for gas sensitivity at an optimum temperature of 145 °C. The sensitivity of the EFM gas sensor with 50 ppm of acetone gas was 83, which was up to four times that of the PFM sensitivity (19). The EFM sensor had an extremely fast response time (4 s) and recovery time (38 s). Moreover, the minimum concentration of acetone that we could detect was 0.1 ppm with a response value of 2.1. The enhancement of gas sensitivity was attributed to the high catalytic activity of the Eu 3+ additive.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Quan Diao,Zhikuan Liu,Longlong Li,Ziyang Zheng,Ning Li,Genxing Zhu,Zhe Fang,Meng Li,Guangyuan Shi,Mingli Jiao
Metal-organic frameworks (MOF), as a new type of crystalline material with advantages such as high specific surface area, controllable pore size and pore structure, show great potential for application in the field of sensors. In this study, a Fe-centered Materials of institute Lavoisier frameworks (MIL) was synthesized by a simple hydrothermal method using fumaric acid, which was modified to Fe 2 O 3 by a simple heat treatment, and the sensor sensitivity was enhanced by adding oxygen vacancy defects. The composition and characterization of the materials were investigated by XRD, SEM/EDS and XPS, and the performance and stability of the gas sensors were studied using gas sensitivity tests. It is comprehensively found that oxygen vacancies (O V ) have been successfully introduced through defect engineering, and the performance of the sensor is greatly enhanced by the introduction of Ov. The Fe 2 O 3 sintered at 500 °C performs an average increase in response of about 2.45 times compared to the sample without oxygen vacancies, an ultra-low detection limit (27.74 ppt), an extremely high response (20 ppm response value of 349.39), and an excellent selectivity. The outstanding performance is due to the nature of the Fe 2 O 3 -MOF material and the introduction of oxygen vacancy defects. Therefore, oxygen defect engineering of metal-organic framework materials has the potential to be an important candidate for high-performance ethanol sensors, which provides new ideas and avenues for the development of new intelligent and high-efficiency gas sensors.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2013
·
IF 3.172
Shaofeng Zhang,Feng Ren,Wei Wu,Juan Zhou,Lingling Sun,Xiangheng Xiao,Changzhong Jiang
Composite photocatalysts that consist of semiconductor and noble metal nanostructures have been considered to be the promising and crucial materials for straightforward improving the efficiency in photocatalytic process and for the conversion of solar to chemical energy. In this work, we fabricated Ag-α-Fe 2 O 3 hybrid composites through a self-catalytic growth method by using the aldehyde-modified spindle α-Fe 2 O 3 nanoparticles (NPs) as supports. The size of supported Ag NPs can be directly controlled on the surface of α-Fe 2 O 3 . The morphology and structure of the resulting Ag-α-Fe 2 O 3 hybrid composites were studied by various techniques, including SEM, TEM, and XRD. The distinct photocatalytic behaviors were examined through the photodegradation of RhB dye. It was found that with the Ag NPs, the photocatalytic activities were enhanced greatly and the size of the Ag NPs played a crucial influence on the photocatalytic behaviors of the Ag-α-Fe 2 O 3 composites.
研究领域:
材料科学
·
光催化
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）