ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Chenglong Li,Shuang Wang,Yinghe Cui,Xiaodong Wang,Zhipeng Yong,Dan Liang,Yue Chi,Zhe Wang
The restacking of the MXene film limits its development to the high energy density of flexible supercapacitors. In order to promote the application of MXene films in portable electronic devices and miniaturized energy storage devices, it is necessary to increase the area capacitance of MXene films for the pursuit of high energy density. The introduction of α-Fe2O3–C–MoS2-PEDOT:PSS (FMP) into MXene significantly increases the area capacitance. Considering the large number of active sites on the surface of MXene and its excellent hydrophilicity, FMP can be well-compounded with MXene, and the accumulation and loss of FMP can be prevented. Meanwhile, it can reduce the performance degradation caused by the accumulation of MXene’s own structure and greatly increase its capacitance value. It is worth mentioning that the MXene/FMP/MXene (M/FMP/M) sandwich structure on the carbon cloth is reasonably designed to show excellent performance. Therefore, the best M/FMP/M electrode could attain a breakthrough in the area capacitance (2700 mF cm–2 and 541 F g–1). At the same time, the electrode maintains a fine rate capability and fabulous flexibility. In addition, the symmetrical supercapacitors also show a significant energy density of 371 μW h cm–2 (12.36 W h·kg–1), making this sandwich structure electrode a promising candidate for high-energy-density devices.
研究领域:
材料科学
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储能技术
·
纳米科技
·
电化学
·
柔性电子学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Yaxin Chen,Chao Li,Junxiao Chen,Xingfu Tang
Low-temperature selective catalytic reduction of NO by NH3 (NH3–SCR) is a promising technology for controlling NO emission from various industrial boilers, but it remains challenging because unavoidable deposition of ammonium bisulfates (ABS) in the stack gases containing both SO2 and H2O inevitably results in deactivation of catalysts. Here we developed a stable low-temperature NH3–SCR catalyst by supporting Fe2O3 cubes on surfaces of MoO3 nanobelts with NH4+-intercalatable interlayers, which enables Fe2O3/MoO3 to spontaneously prevent ABS from depositing on the surfaces. Using in situ synchrotron X-ray diffraction, 1H magic angle spinning nuclear magnetic resonance, and temperature-programmed decomposition procedure, the results demonstrate that NH4+ of ABS was initially intercalated in the interlayers of MoO3, leading to a NH4+-HSO4– cation–anion separation by conquering their strong electrostatic interactions, and subsequently the separated NH4+ was consumed by taking part in low-temperature NH3–SCR. Meanwhile, the surface HSO4– separated from ABS oxidized the reduced catalyst during the NH3–SCR redox cycle, concomitant with release of SO2 gas, thereby resulting in decomposition of ABS. This work assists the design of stable low-temperature NH3–SCR catalysts with strong resistance against deposition of ABS.
研究领域:
环境催化
·
材料科学
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空气污染控制
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无机化学
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DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 81
·期 9
·1983-1993
·
IF 1.638
Wang Liping,Yu Xiaocai,Liao Jiaqi,Xue Bining,Tian Siyao,Zhu Wanting
Fe 2 O 3 /ZrO 2 nanocomposite photocatalyst was successfully prepared by coprecipitation method for the degradation of diesel pollutants in seawater under visible light. The effects of doping ratio, calcination temperature, photocatalyst dosage, initial diesel concentration, H 2 O 2 concentration, and reaction time on the photocatalytic removal efficiency were investigated. Moreover, the optimal conditions for Fe 2 O 3 /ZrO 2 nanocomposite photocatalyst to degrade marine diesel pollution were determined. The removal efficiency of diesel by nanocomposite photocatalyst could reach 97.03%. A photocatalyst-loaded polypropylene polyhedral ball was prepared, and the removal efficiency of diesel by photocatalyst-loaded polypropylene polyhedral ball decreased from 99.35 to 68.84% after four recycling cycles.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Baosheng Li,Xue Ma,Yuying Xin,Zoltán Major,Xianfa Zhang,Tingting Wang,Lihua Huo,Xiaoli Cheng,Yingming Xu
Real-time detection and degradation of chemical warfare agents have great importance in both human healthcare and environmental protection. Herein, hierarchical Fe 2 O 3 nanotube arrays were constructed by a simple in situ solvothermal method for effective monitoring of 2-chloroethyl ethyl sulfur enigma (2-CEES). The resultant Fe 2 O 3 sensor exhibited ultrahigh response (9.6) and short response time (3.7 s) to 10 ppm 2-CEES at 170 ℃. The sensor also behaved low detection limit (30 ppb), good stability, and high moisture resistance . Notably, Fe 2 O 3 nanotube arrays demonstrated high degradation capacity (95.2%) (100 ppm, 10 min). Such excellent performance of the portable Fe 2 O 3 sensor for 2-CEES comes from the synergistic effect of multiple microstructural features , active sites, and surface-adsorbed oxygen species at operating temperature. The 2-CEES sensing mechanism of Fe 2 O 3 nanotube arrays has been discussed in detail. This work offers guidance for designing high-performance sensing materials to realize efficient detection of chemical warfare agents.
研究领域:
材料科学
·
环境监测
·
化学传感
·
纳米技术
·
公共安全
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Qiaolin Li,Tiantian Cao,Gang Chen,Hongtao Guan,Chengjun Dong,Zongyou Yin
Reliable detection of volatile organic compounds (VOCs), such as acetone, is essential for environmental monitoring and non-invasive disease diagnosis. However, conventional In 2 O 3 -based gas sensors suffer from high operating temperatures, humidity interference, and limited selectivity. Herein, we report one-dimensional (1D) hollow In 2 O 3 @Fe 2 O 3 core-shell heterojunction tubes fabricated via a tannic acid (TA)-assisted transformation of MIL-68(In). TA plays dual roles in etching the MIL-68(In) template and coordinating with Fe 3 + ions to form a mesoporous tubular structure with an enhanced specific surface area of 89.57 m 2 g −1 for In 2 O 3 @Fe 2 O 3 -0.75. Benefiting from the synergistic n-n heterojunction effect and abundant active sites, the optimized In 2 O 3 @Fe 2 O 3 -0.75 sensor exhibits a markedly improved response of 263.6 towards 100 ppm acetone at 200 °C, approximately 3.6 times that of pristine In 2 O 3 , and enables detection down to 100 ppb with a response of 1.87. Furthermore, the sensor demonstrates rapid response/recovery (8/9 s), excellent long-term stability over 30 days, and remarkable humidity tolerance across 29–82% RH at 25 °C. This work provides an effective MOF-derived strategy for constructing hollow metal-oxide core-shell heterojunctions toward high-performance and humidity-tolerant gas sensing applications.
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Peifei Yan,Huaxu Song,Chen Zhu,Zhenlu Li,Jinya Sun,Yean Li,Jingying Hou,Yishun Xie,Xin Fan
The high theoretical specific capacity and natural abundance of Fe 2 O 3 render it an appealing choice for utilization as an anode material in asymmetric supercapacitors (ASCs). The material's path to practical adoption, however, is plagued by inherent limitations, including low intrinsic conductivity and substantial volume variation during charge-discharge processes. To overcome these issues, this work synthesized a Co 2+ -doped Fe 2 O 3 composite (CMF) using a metal-organic framework (MOF) as a sacrificial template. The MOF-derived Fe 2 O 3 possesses a highly ordered and tunable pore architecture, thereby enabling swift diffusion and migration of electrolyte ions. Furthermore, introducing Co 2+ into the Fe 2 O 3 lattice generates many oxygen vacancies and crystal defects, greatly boosting its intrinsic conductivity, ion migration, and structural stability. Electrochemical characterization demonstrated that the optimized 2 wt% CMF electrode yielded a high specific capacity of 226.1 mAh g −1 at 1 A g −1 . When configured into an AC//2 wt% CMF asymmetric supercapacitor, the device recorded an energy density of 43.1 Wh kg −1 at a power density of 350 W kg −1 . Notably, the assembled device also exhibited outstanding cycling durability, retaining 96.4% of its initial capacity after 20,000 cycles at 2 A g −1 . The practical capability of the device was demonstrated by powering a light-emitting diode (LED), highlighting its potential for real-world applications.
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产品关联
DOI
高影响因子
ATMOSPHERIC ENVIRONMENT
·
2022
·
IF 5.755
Xi Xi,Xiang He,Zhi-Cheng Ma,Hui-Qing Ma,Peng-Cheng Liao
Formation processes of nitrogen-containing organic compounds (NOCs) are important from heterogeneous reactions between volatile organic compounds (VOCs) and mineral oxides under various environmental factors. In this study, reaction processes of C 3 H 6 /O 3 /NO 2 with α-Fe 2 O 3 particles were studied by using a gas-flow system with diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The results show that the appearance of R–ONO 2 bands at ∼1648 and 1286 cm −1 represents the formation of NOCs. In the dark condition, the presence of O 3 leads to the rapid formation of nitrate radical (NO 3 ) which can react with C 3 H 6 to form NOCs on particle surface. Under the simulated sunlight irradiation, the α-Fe 2 O 3 can be excited to produce additional hydroxyl which promotes the formation of RO 2 . Meanwhile, formed NO from the photolysis of NO 2 can react with RO 2 to produce more NOCs. Moreover, the presence of water vapor plays a negative role in the NOCs formation processes. The value of uptake coefficient for the NO 2 in the initial stage at 0% relative humidity (RH) is about 10 times higher than that at 76.3% RH during the heterogeneous reactions. The R–ONO 2 group hydrolyzes to nitric acid and R–OH under the humid condition. Our results lay the foundation on the effects of light irradiation and RH for the converting VOCs into NOCs on mineral dust and help to understand the formation processes of NOCs under combined atmospheric environment.
研究领域:
大气化学
·
环境科学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Runji Yang,Weiqing Guo,Qingxi Jin,Yaohua Xu,Feng Wei,Jiliang Zhang
Sensitive, selective and low-cost sensors for nitric oxide (NO) detection are significant due to its toxicity. This report investigates the tunable sensing behavior in chemiresistive NO sensors using α-Fe2O3 nanoparticles as sensing materials. The sensor exhibits a distinctive sensing characteristic with a reversible transition from p- to n-type sensing behavior, which is regulated by working temperature. The temperature-modulated (200–400 °C) and concentration-dependent (100–1000 ppm) p–n transition diagrams are constructed, while the gas sensing behaviors can be well described using a two-isotherm model based on Langmuir adsorption theory. Detailed reactions between NO and α-Fe2O3 at each temperature are proposed, and the corresponding activation energy is calculated. It is demonstrated that the p–n transition mechanism during NO detection is modulated by the dynamic variations in the α-Fe2O3–NO interaction. The p–n transition observed as a specific behavior in NO gas sensing can provide a novel approach to enhance the recognition capability for NO gas.
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产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2016
·Vol. 2016
·期 34
·5387-5392
·
IF 2.686
Liang Zhou,Lingzhi Wang,Jinlong Zhang,Juying Lei,Yongdi Liu
Graphical A heterogeneous photo-Fenton system (Fe 2 O 3 /g-C 3 N 4 /H 2 O 2 /visible light) has been developed for highly efficient and stable catalytic degradation of organic pollutants in water. The combination of the Fenton's reagent Fe 2 O 3 /H 2 O 2 and the photocatalyst g-C 3 N 4 greatly enhances the rate of the Fenton's reaction with the assistance of the photocatalytic process. In this study, a highly efficient heterogeneous photo-Fenton system (Fe 2 O 3 /g-C 3 N 4 /H 2 O 2 /visible light) has been developed. The heterogeneous catalyst Fe 2 O 3 /g-C 3 N 4 in this system was successfully prepared by growing Fe 2 O 3 nanoparticles on the surface of g-C 3 N 4 . The Fe 2 O 3 nanoparticles could achieve high dispersion on the surface of g-C 3 N 4 and form a heterojunction with g-C 3 N 4 to improve the charge separation. In addition, the combination of the Fenton's reagent Fe 2 O 3 /H 2 O 2 and the photocatalyst g-C 3 N 4 greatly enhances the rate of the Fenton's reaction with the assistance of the photocatalytic process. The results showed that the Fe 2 O 3 /g-C 3 N 4 catalyst had a superior catalytic activity as compared with the single component of Fe 2 O 3 or g-C 3 N 4 and the mechanical mixture of Fe 2 O 3 and g-C 3 N 4 . The catalyst prepared with 3 mL of FeCl 3 aqueous solution shows the best photo-Fenton photocatalytic efficiency with a reaction rate constant of 0.02461 mg L –1 min –1 , which is about 45.4, 8.4 and 7.2 times larger than that of pure Fe 2 O 3 (0.0005418 mg L –1 min –1 ), pure g-C 3 N 4 (0.00294 mg L –1 min –1 ) and the mechanically mixed Fe 2 O 3 /g-C 3 N 4 (0.0034 mg L –1 min –1 ), respectively. A possible mechanism for the visible-light-irradiated photo-Fenton photocatalysis is proposed, and the Fe 2 O 3 /g-C 3 N 4 catalyst exhibited stable performance without obvious loss of catalytic activity after four successive runs, showing a good application prospect for the photo-oxidative degradation of organic contaminants in wastewater.
研究领域:
环境科学
·
材料化学
·
光催化
·
纳米技术
·
水处理
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DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 25
·255502
·
IF 3.399
Chonghui Zhu,Umut Cakmak,Ommeaymen Sheikhnejad,Xiaoli Cheng,Xianfa Zhang,Yingming Xu,Shan Gao,Hui Zhao,Lihua Huo,Zoltán Major
Novel sea cucumber-shaped polyaniline/ferric oxide (PANI/Fe2O3) nanocomposites were synthesized using a simple and efficient one step hydrothermal process, and the nanocomposites were further assembled onto a polyethylene terephthalate (PET) flexible substrate. Through the monitoring of the resistance of the PANI/Fe2O3 nanocomposites thick films and PANI/Fe2O3-PET flexible sensors, the responses of the sensors to various 100 ppm gases including methanol, triethylamine, aniline and another five gases were obtained. It was found that two kinds of sensors exhibit a high selectivity towards NH3. The PANI/Fe2O3 nanocomposites-based sensor has a good response and a low detection limit (0.3 ppm) at room temperature (20 ± 5 °C). It also shows a good linearity relationship in a certain concentration of NH3. After assembling into the PANI/Fe2O3-PET flexible film sensor, the response of the sensor is significantly increased to 6.12 for 100 ppm NH3, the detection limit is as low as 0.5 ppm, and the sensor shows good stability and linearity, which is more conducive to the application of such a material in wearable gas sensors.
研究领域:
材料科学
·
化学传感器
✓ 已验证
DOI
PubMed
高影响因子
Catalysts
·
2023
·Vol. 13
·期 3
·588
·
IF 3.9
Haiou Zhang,Yixin Zhang,Huikang Song,Yan Cui,Yingying Xue,Cai-e Wu,Chao Pan,Jingxin Xu,Jian Qiu,Leilei Xu,Mindong Chen
As a toxic pollutant, carbon monoxide (CO) usually causes harmful effects on human health. Therefore, the thermally catalytic oxidation of CO has received extensive attention in recent years. The CuO-based catalysts have been widely investigated due to their availability. In this study, a series of transition metal oxides (Fe2O3, Co3O4and NiO) promoted CuO-based catalysts supported on the α-MnO2nanowire catalysts were prepared by the deposition precipitation method for catalytic CO oxidation reactions. The effects of the loaded transition metal type, the loading amount, and the calcination temperature on the catalytic performances were systematically investigated. Further catalyst characterization showed that the CuO/α-MnO2catalyst modified with 3 wt% Co3O4and calcined at 400 °C performed the highest CO catalytic activity (T90= 75 °C) among the investigated catalysts. It was supposed that the loading of the Co3O4dopant not only increased the content of oxygen vacancies in the catalyst but also increased the specific surface area and pore volume of the CuO/α-MnO2nanowire catalyst, which would further enhance the catalytic activity. The CuO/α-MnO2catalyst modified with 3 wt% NiO and calcined at 400 °C exhibited the highest surface adsorbed oxygen content and the best normalized reaction rate, but the specific surface area limited its activity. Therefore, the appropriate loading of the Co3O4modifier could greatly enhance the activity of CuO/α-MnO2. This research could provide a reference method for constructing efficient low-temperature CO oxidation catalysts.Keywords:transition metal oxides;CuO-based catalysts;Co3O4modification;α-MnO2nanowire;catalytic oxidation of CO
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产品关联
DOI
高影响因子
ACS ES&T Engineering
·
2023
·
IF 7.1
Wei-Ping Zhu,Jie Deng,Zhi-Jie Chen,Jia-Cheng Li,Juan Xu
The performance of three-dimensional biofilm electrode reactors (3D-BERs) in hydrogen autotrophic denitrification is determined by electroactive biofilms. Herein, a self-assembled hybrid biofilm (SAHB) is developed on granular activated carbon particle electrodes by incorporating nano α-Fe2O3. The influences of operating parameters such as current, influent concentration, and hydraulic retention time (HRT) on denitrification are investigated as well as the mechanisms of SAHB-improved denitrification. The results indicate that SAHB achieves a high autotrophic denitrification rate of 4.20 mg TN/L/h under 40 mA current, 100 mg/L nitrate, and 26 h HRT, outperforming the naturally formed biofilm by 23.53%. SAHB contains more microorganisms than naturally formed biofilms, revealing that nano α-Fe2O3 is conducive to trapping free microorganisms on particle electrodes. SAHB enriches denitrification-related genes and increases corresponding enzyme activities (particularly nitrite reductase). According to metagenomic sequencing, nano α-Fe2O3 addition at a current level of 40 mA appears to favor denitrification via the nirS-dependent pathway probably due to its high affinity for cytochrome C. Metagenomic binning reveals that the microorganism associated with Zoogloeaceae (Rhodocyclales order) in SAHB may play a pivotal role in hydrogen autotrophic denitrification. This work develops a novel denitrification system, furthering our understanding of hydrogen autotrophic denitrification in 3D-BERs.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）