JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 11
·8236-8246
·
IF 3.442
Wen Yun,Zhao Yue,Guo Mingzhen,Xu Yan
Photo-Fenton reactions and the related functional nanomaterials have been widely studied for applications in wastewater treatment industry. Herein, visible-light-responsive Fe 2 O 3 nanoparticle-decorated BiVO 4 nanoplates were designed and successfully prepared through a one-pot hydrothermal route. The as-prepared Fe 2 O 3 /BiVO 4 nanocomposites exhibit excellent photo-Fenton catalytic activity toward the discoloration of methylene blue (MB) and Rhodamine B (RhB) dye molecules in the presence of H 2 O 2 . The experimental results indicate that nearly 100% of MB (100 mL, 10 mg L −1 ) and RhB (100 mL, 5 mg L −1 ) dye molecules are degraded in the presence of 1 g L −1 Fe 2 O 3 /BiVO 4 -1 (FB-1) photo-Fenton catalyst and 0.5 mL of H 2 O 2 within 20 min. The Fe 2 O 3 /BiVO 4 Fenton photocatalyst also demonstrates high reusability under visible light irradiation with λ ≥ 420 nm. The photoinduced electrons on the conduction band of BiVO 4 nanoplates can move toward the surface of Fe 2 O 3 /BiVO 4 to accelerate the reduction of Fe 3+ ; then, the as-formed Fe 2+ ions on the surface of the catalyst greatly enhance the decomposition of H 2 O 2 to form reactive · OH species for the use in photodegradation of MB and RhB dye molecules. The synergetic effect of Fe 2 O 3 and BiVO 4 reported in this work might provide more opportunity to fabricate other novel semiconductor-based Fenton nanocomposites for contamination treatments in wastewater.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
VACUUM
·
2023
·
IF 4
Xiang-Bing Li,Dan Wang,Cheng Gao,Xiao-le Zhao,Shuang Sun,Ying-ying Ren,Qian-qian Zhang,Jin-bing Zhang,Wen-qiang Dang,Yu-Xiang Zhao,Li-Jun Zhang,Yu-Ping Wang,Li-Min Zhao,Jian-Zhen An,Xue-Fu Kang,Wen-Bo Zhao,Qing Liu
The rough surface Fe 2 O 3 –SnO 2 composite nanorod material was prepared by electrostatic spinning. The morphology and nanostructure of Fe 2 O 3 –SnO 2 composite nanorods were characterized by scanning electron microscopy SEM , nitrogen physical adsorption and X-ray diffraction. Through the analysis of the test results, it can be shown that the Fe 2 O 3 –SnO 2 nanorod samples prepared in this experiment have the advantages of high purity, good crystallinity and large specific surface area. The specific surface area of the sample obtained from the test is 19.27 m 2 /g. According to the gas sensitivity test results of Fe 2 O 3 –SnO 2 nanorods, it can be seen that Fe 2 O 3 –SnO 2 samples have high responsiveness and excellent gas sensitivity selectivity . Various gases were tested in this experiment, and it was found that the sensor has good gas selectivity to isobutanol. At 310 °C, the sensor's response to 100 ppm isobutanol reached 13. This experiment not only prepared Fe 2 O 3 –SnO 2 nanorod sensor with good isobutanol gas sensitivity. And it realized the accurate measurement of continuous isobutanol concentration. In addition, the gas sensitivity mechanism of Fe 2 O 3 –SnO 2 nanomaterials was discussed.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Daixiong Zhang,Xinxi He,Mei Huang,Qing Xiang
Electrophoretic deposition (EPD) is a promising method for fast-preparing thermite (Al/MO x ) coatings and other energetic coatings with the advantages of simplicity, low cost, and wide adoptability for complex shapes. However, post-sintering treatment is unsuitable for enhancing the poor adhesion of electrophoretic Al/MO x coating and other energetic coatings because of the contradiction between the sintering temperature and the trigger temperature of thermite reaction. In this work, electrophoretic Al/MO x (i.e., Fe 2 O 3 ) coatings with high adhesion were designed by using other MO x nanoparticles (i.e., NiO) prepared via oil-phase synthesis (named as O-MO x ) as an outer coating. DSC curves show that the value of heat release in the electrophoretic NiO-Al/Fe 2 O 3 coating is 2568 J g −1 . The combustion test successfully confirms a violent and quick energy releasing of the designed Al/Fe 2 O 3 coating. More attractively, this strategy can also be employed to prepare many other kinds of Al/MO x coating (i.e., CuO, MoO 3 , WO 3 , Bi 2 O 3 ) or energetic coating (i.e., B/Ti) with good adhesion via EPD. In summary, this study provides a general strategy for electrophoretic preparation of Al/MO x coatings with high adhesion, excellent thermodynamic properties and electrical explosion performance, which would solve the key issue for preparing Al/MO x coatings through EPD technology.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2024
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IF 5.9
Yimo Zhao,Lijiao Zheng,Yongyang Chen,Yuan Liu,Shimeng Huang,Shanping Li
In this study, a highly efficient La-Fe 2 O 3 /dielectric barrier discharge (DBD)/honeycomb ceramic plate synergistic catalytic system was successfully constructed by using modified iron oxide (Fe 2 O 3 ) catalyst coating assisted DBD plasma, and the prepared catalytic coating was fully characterized by various techniques. The results indicate that the lanthanum (La) is efficiently and uniformly doped in Fe 2 O 3 , and the modified La-Fe 2 O 3 catalyst exhibited a better photocatalytic performance. The overuse of Thiamphenicol (TAP), as a typical chloramphenicol antibiotic, has led to its accumulation in the aquatic environment. Accordingly, TAP was selected as the target contaminant to evaluate the catalytic activity of the synergistic system. The results confirmed that the catalytic ability of the synergistic catalytic system was significantly improved, and the data showed that the degradation rate of the synergistic system reached 99.1% under the same conditions compared with 68.2% for the single DBD plasma, which effectively improved low energy efficiency limitations of the single DBD technology. Through quantitative measurements of the concentrations of dissolved ozone (O 3 ) and hydrogen peroxide (H 2 O 2 ) in the system and radical trapping experiments, combined with emission spectroscopy, the mechanism of synergistic system degradation of TAP was analyzed. The intermediates in the degradation process were characterized by high-resolution mass spectrometry, and the degradation pathway of TAP was proposed based on the analysis of the intermediates and their combination with theoretical calculations. This study presents a theoretical basis for the improvement of DBD technology and a technical guide for the removal process of antibiotics from industrial wastewater.
研究领域:
环境科学
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催化化学
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抗生素降解
✓ 已验证
DOI
PubMed
高影响因子
IONICS
·
2022
·Vol. 28
·期 4
·1501-1510
·
IF 2.961
Fu Yajing,Zhang Canping,Pan Lin,Yang Longyu,Wang Shiquan,Liu Jianwen
Different amounts of Fe 2 O 3 -coated NiMoO 4 /NiO composites were prepared by solvothermal method following with annealing process. The as-prepared NiMoO 4 /NiO@Fe 2 O 3 composite exhibits a reversible specific capacity of 1250 mAh g −1 after 150 cycles at a current density of 100 mA g −1 as anode for lithium-ion batteries. It exhibits efficient long-term electrochemical performance and maintains the capacity at about 750 mAh g −1 at a high current density of 500 mA g −1 after 200 cycles. The good electrochemical performance of the NiMoO 4 /NiO@Fe 2 O 3 composite may be due to its smaller size and the Fe 2 O 3 coating which can restrain its volume collapse during the charge–discharge cycle. This work could provide a promising strategy for enhancing the performance of molybdate-based composite materials for practical application in lithium-ion batteries.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 22
·20589-20600
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IF 2.22
Zhang Jianxia,Guo Huixiao,Li Shuo,Li Yu,He Yue,Li Xiaosong,Tian Chunxia,Sun Dan,Liu Li
The structure and surface properties of the sensing materials have been considered as the main factors for the fabrication of metal–oxide semiconductor gas sensors. In this paper, a one-step hydrothermal method for the preparation and control of the morphology of α-Fe 2 O 3 is reported. The results show that the amount of glycol has a great influence on the morphology of the products. With the variation in ethylene glycol concentration (from 30 to 110 ml), we can obviously see the product was assembled into three-dimensional porous α-Fe 2 O 3 micro-flower structure from two-dimensional nanochips from scanning electron microscope (SEM) pictures. When the ethylene glycol was 70 ml, the micro-flower structure was the most uniform and perfect. It additionally showed the largest specific surface area (63.69 m 2 /g) and the biggest oxygen vacancy in nitrogen adsorption–desorption and XPS analysis. Further gas sensitivity test showed that gas sensitivity was also the best. Under the low operating temperature (210 °C), the porous α-Fe 2 O 3 micro-flower (70 ml glycol) showed the highest response (49.4) to 100 ppm acetone, the sensitivity of other materials was 8.2/30 ml, 14.7/40 ml, 38.4/50 ml, 36.7/90 ml, 10.3/100 ml, 4.8/110 ml, respectively. In addition, the porous α-Fe 2 O 3 micro-flower (70 ml glycol) has excellent selectivity, short response/recovery time (1 s/31 s), low detection offline (2.2 to 0.2 ppm acetone), and good stability. The reason for the improvement of gas-sensing performance is mainly due to the change of morphology, decrease of crystallite size, the increase of oxygen vacancy, and specific surface area.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 53
·期 5
·3682-3691
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IF 2.599
Chang Meng-Jie,Wang Hua,Li Hui-Lu,Liu Jun,Du Hui-Ling
A novel magnetic Fe 2 O 3 /BiOI hybrid nanostructure was fabricated by combining electrospinning and successive ionic layer adsorption and reaction (SILAR) method. Hollow Fe 2 O 3 nanofibers with internal diameter around 50 nm were produced by using electrospinning and calcinations of the as-spun fibers at 450 °C for 2 h. BiOI was deposited on the Fe 2 O 3 nanofiber surface by SILAR method, and the BiOI quantity could be controlled by the growth cycles of SILAR. Similar synthetic procedure could also be used to prepare Fe 2 O 3 /BiOBr and Fe 2 O 3 /BiOCl hybrid nanostructures. The BiOI on the magnetic nanofiber surface is highly crystalline with lamellae morphology of around 16 nm in thickness from the X-ray diffraction and scanning electron microscopy detections. The obtained Fe 2 O 3 /BiOI hybrid nanostructures exhibit superior visible light catalytic performance toward decomposition of RhB. This new method, which can also be used to prepare other magnetic photocatalyst simply at low cost, is suitable for practical applications.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-10
·
IF 4.259
Huang Renkun,Liang Ruowen,Fan Haimei,Ying Shaoming,Wu Ling,Wang Xuxu,Yan Guiyang
With increasingly stringent environmental regulations, the removal of nitrogen-containing compounds (NCCs) from gasoline fuel has become a more and more important research subject. In this work, we have successfully synthesized TiO 2 /α-Fe 2 O 3 heterogeneous photocatalysts with different mass ratios of TiO 2
vs . α-Fe 2 O 3 . Taking photocatalytic denitrification of typical alkali NCCs, pyridine, in gasoline fuel under visible light irradiation (λ ≥ 420 nm) as the model reaction, the TiO 2 /α-Fe 2 O 3 hybrids have exhibited enhanced photocatalytic activity compared with pure TiO 2 and α-Fe 2 O 3 , giving a pyridine removal ratio of ∼ 100% after irradiation for 240 min. The improved photocatalytic performance can be attributed to the integrative effect of the enhanced light absorption intensity and more efficient separation of photogenerated electron-hole pairs. Importantly, this type of heterogeneous photocatalysts can be easily separate in the reaction medium by an external magnetic field that is very important for industrial purpose. In addition, major reaction intermediates have been identified by the liquid chromatograph-mass spectrometer (HPLC-MS) and a tentative photocatalytic denitrification mechanism has been proposed.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 46
·29184-29192
·
IF 3.108
Ting Song,Piyong Zhang,Jian Zeng,Tingting Wang,Atif Ali,Heping Zeng
C60/Fe2O3 nanocomposites are successfully prepared, well characterized, and employed in visible-light-driven photocatalytic H2 production. The Fe2O3 polymorphs show obvious broad-spectrum absorption, even close to the near infrared region (780–900 nm). The H2 production rates of β-Fe2O3 and γ-Fe2O3 are almost 2.1 times and 3.1 times higher than α-Fe2O3 (which itself is close to that of g-C3N4). This demonstrates that carefully controlling the polymorphs can tune the photocatalysts' H2 production properties. After modifying the Fe2O3 polymorphs with C60, the sample with 0.5 wt% C60/β-Fe2O3 has the optimum photocatalytic activity. This result indicates that the strength of the interaction and interfacial contact between C60 and Fe2O3 polymorphs plays an important role in the enhancement of photocatalytic activity, which can improve the transmission efficiency of photogenerated electrons via a conjugated three-dimensional π system. Fluorescein is introduced as a photosensitizer and the optimum mass ratio of fluorescein + 0.5C60/β-Fe2O3 is 1 : 1, which significantly boosts the photocatalytic H2 evolution rate of 0.5C60/β-Fe2O3 from 321.8 to 1665.0 μmol g−1 h−1. Meanwhile, the composites exhibit high stability and reusability.
研究领域:
材料科学
·
光催化化学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Guangdi Nie,Xiaofeng Lu,Maoqiang Chi,Yun Zhu,Zezhou Yang,Na Song,Ce Wang
The incompetency of conventional single-phase electrode materials remains a stumbling block for making further breakthroughs in high-performance supercapacitors. In this work, α-Fe 2 O 3 nanotube@MnO 2 nanosheet hierarchical networks with tunable mass ratio of MnO 2 to α-Fe 2 O 3 are prepared via a simple two-step method for supercapacitor electrodes. The α-Fe 2 O 3 @MnO 2 core-shell heterostructures, especially the FM10020 containing 60.1 wt% of MnO 2 , exhibit a larger specific capacitance of 289.9 F g −1 at 1.0 A g −1 , a better rate capability of 40.8% at 5.0 A g −1 and a higher cycling stability of 85.3% after 1200 cycles than the pure MnO 2 , highlighting the advantages of such unique configuration accompanied by the synergistic effect. It is believed that these intriguing results will provide an alternative way for the construction of metal oxide-based composite nanostructures with improved electrochemical performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Ning An,Lei Zhou,Wenli Li,Xiaoli Yuan,Li Zhao,Jingwei Huang,Yang Zhang,Houde She,Lei Wang,Qizhao Wang
Modifying semiconductor photoanode with efficient and cheap iron-based oxygen evolution cocatalyst along with functional interlayer is an efficient method to enhance the water splitting efficiency of photoelectrochemical (PEC). Poly-aminoanthraquinone (PDAAQ) due to its outstanding reversible redox activity plays a significant role as proton receptor. Herein, an easy-handle solvothermal method is adopted to prepare γ-Fe 2 O 3 -PDAAQ@BiVO 4 . With the concerted efforts of the ternary structure, the photocurrent of γ-Fe 2 O 3 -PDAAQ@BiVO 4 photoanode reach to 5.35 mAcm 2 at 1.23 V RHE (3.3 times of pure BiVO 4 ). The improvement is ascribable to the abundant catalytic active sites and large catalytic area of γ-Fe 2 O 3 nanoparticles . Additionally, theoretical calculations show that PDAAQ can form type II heterojunction with BiVO 4 to inhibit carrier recombination. At the same time, the role of PDAAQ in promoting water oxidation kinetics by accelerating proton coupled electron transfer process has also been confirmed in isotope effect experiment.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
FUEL
·
2016
·
IF 3.611
Ting Liu,Changyong Man,Xin Guo,Chuguang Zheng
Experiments were conducted in a bench-scale fixed bed reactor with α-Fe 2 O 3 and γ-Fe 2 O 3 samples to investigate the mechanism of Hg 0 oxidation in the presence of HCl at 80–680 °C respectively. HCl is one of the main impurities in coal-derived fuel gas and its contribution to Hg 0 removal is complex and necessary to research. The experimental results showed that the Hg 0 removal mechanism with HCl could probably be divided into three stages based on the reaction temperature. At low temperature, the Eley–Rideal mechanism with HCl pre-adsorption was the most probable Hg 0 oxidation pathway. As the temperature increased more than 280 °C, Hg 0 removal efficiency differs significantly on α-Fe 2 O 3 and γ-Fe 2 O 3 , and the most suitable mechanism was Langmuir–Hinshelwood. With the increasing temperature to 680 °C, the homogeneous reaction between HCl and Hg 0 as well as Langmuir–Hinshelwood are responsible for the transformation of Hg 0 . We also discovered that the reaction time played a significant impact on the Hg 0 removal at low temperature, and caused the secondary mercury removal efficiency owing to the probable product of FeCl 3 . Additionally, HBr was adopted to compare with HCl, which obviously enhanced the Hg 0 oxidation on α-Fe 2 O 3 .
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
危险品化学品经营许可证（带存储）