SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Xin Chen,Ming Zhang,Haowei Qin,Jiancheng Zhou,Quanhao Shen,Ke Wang,Wenshuai Chen,Maochang Liu,Naixu Li
The perovskite-type LaFeO 3 serves as a promising photo-Fenton-like catalyst, but its low adsorption ability and catalytic activity inhibit the effective removal of ofloxacin. Herein, the LaFeO 3 and lignin-biochar composites were fabricated by a facile sol–gel pyrolysis route. As compared with LaFeO 3 nanoparticles, the LaFeO 3 /lignin-biochar composites showed better adsorption and degradation ability due to the synergistic effect between LaFeO 3 nanoparticles and lignin-biochar. Compared with LaFeO 3 , the adsorption capacity of LaFeO 3 /lignin-biochar for ofloxacin increased from 0.72 to 30.4 mg·g −1 . Importantly, this catalyst exhibited the improved degradation efficiency of ofloxacin during 75 min (95.6 % for LaFeO 3 /lignin-biochar Vs 53.4 % for LaFeO 3 ) as the adsorption process was combined with the photo-Fenton-like process. Notably, the lignin-biochar in the LaFeO 3 /lignin-biochar composites decreased the bandgap of LaFeO 3 nanoparticles from 2.10 eV to 1.79 eV due to the interface interaction between LaFeO 3 and lignin-biochar, facilitating the enhanced photo-Fenton-like activity. The hydroxyl radicals that were generated in the photo-Fenton-like process effectively induced the oxidative degradation of ofloxacin, which was confirmed by free radical capture experiments and ESR characterization. Moreover, the photo-Fenton-like degradation pathway of ofloxacin was proposed according to LC-MS analyses, and the toxicity analysis of degradation intermediates was further carried out. Hence, the LaFeO 3 /lignin-biochar composite was a promising photo-Fenton-like catalyst to eliminate ofloxacin via coupling of adsorption and photo-Fenton-like processes.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 185
·期 1
·1-6
·
IF 4.58
Liu Xing-Pei,Xie Xing-Li,Wei Yu-Ping,Mao Chang-jie,Chen Jing-Shuai,Niu He-Lin,Song Ji-Ming,Jin Bao-Kang
A film of perovskite-type LaFeO 3 nanoparticles (NPs) was deposited on fluorine-doped tin oxide (FTO) conducting glass via dipping-lifting and calcination. Scanning electron microscopy shows that the NPs are evenly distributed on the surface of the glass. The modified glass was further coated with antibody against human interleukin 6 (IL-6) to result in a photoelectrochemical immunosensor for IL-6. The well-established photoelectrochemical immunoassay has a linear current response in the range of 0.1 pg·mL −1 to 0.1 μg·mL −1 and a detection limit as low as 33 fg·mL −1 . Schematic of a novel photoelectochemical immunoassay for the measurement of IL-6 based on perovskite-type LaFeO3 nanoparticles. The immunoassay had a higher sensitivity and may also be applied to other bioanalysis and environment monitoring.
研究领域:
生物化学
·
分析化学
·
生物传感器
·
免疫分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Ensi Cao,Yixuan Zhang,Yongjia Zhang,Wentao Hao,Bing Sun,Li Sun
To enhance the acetone sensing capabilities of LaFeO 3 nanoparticles for practical applications in breath analysis, commercial n-type rutile TiO 2 nanoparticles were utilized as additives and directly mixed with LaFeO 3 nanoparticles synthesized via a sol–gel method. The obtained TiO 2 -LaFeO 3 nanocomposites were characterized by XRD, SEM, BET, and XPS. Compared to pure LaFeO 3 nanoparticles, the resulting TiO 2 -LaFeO 3 nanocomposites exhibited higher surface reactivity, as evidenced by their larger specific surface areas and higher oxygen vacancy contents. The introduction of TiO 2 also facilitated the formation of p-n heterojunctions, which enhanced the regulation of acetone molecules on internal carrier conduction within the nanocomposites. Therefore, the TiO 2 -LaFeO 3 nanocomposites demonstrated improved acetone sensing performance, including higher vapor response values, selectivity, and faster response/recovery speeds. Among the series of nanocomposites, those with an addition of 10 wt% TiO 2 exhibited the highest vapor response value (37.3 to 100 ppm) and the greatest selectivity against methanol and ethylene glycol at the prime operating temperature of 144 °C.
研究领域:
材料科学
·
纳米技术
·
传感器
·
表面化学
·
呼吸分析
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 4
·043501
·
IF 4.316
Kailiang Ren,Zeang Duan,Yuan Li,Lu Zhang,Shumin Han
LaFeO3 as a new negative electrode material for nickel-hydrogen batteries used as energy storage has the advantages of high capacity, advanced temperature resistance, and low cost. However, its conductivity and dynamic performance are poor, seriously hindering its applications. In light of increasing concentration of oxygen vacancies and improving conductivity after replacing A-site elements of the material, here we synthesize low-priced Na doping LaFeO3 oxides, La1−xNaxFeO3 (x = 0–0.8), as the negative electrode by a solid-state reaction method. Studies show that doping Na can reduce particle aggregation, thus helping to increase the surface area of LaFeO3. Therefore, its discharge capacity remarkably increases to 356.7 mAh g–1 (x = 0.6) from 178.8 mAh g–1 (x = 0) at 60 °C, which also maintains 73.4% after 100 cycles for La0.4Na0.6FeO3, elevated by 55.1% compared to LaFeO3. In addition, the high rate discharge ability of an La0.4Na0.6FeO3 electrode at a discharge current density of 1500 mA g–1 reaches 30.7% in contrast to 11.2% for undoped LaFeO3. As such, the La0.4Na0.6FeO3 material with superior cycling capacity is proven to be a more promising electrochemical hydrogen storage electrode compared to LaFeO3, which greatly increases the practical application value of the material.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Haoming Sun,Congling Yin,J. Paul Attfield,Minghui Yang
Resistive sensors are widely used to detect gases, but integrating magnetoresistive effects for enhanced selectivity and sensitivity remains largely unexplored. Here we have investigated several magnetic materials in a metal oxide semiconductor (MOS) sensor, showing that iron oxides can exhibit both positive and negative magnetoresponses at relatively low operating temperatures (120–160 °C), with no simple correlation between magnetoresponse and bulk magnetization, leading to the discovery of La0.8FeO3 as an outstanding material for magnetoresistive gas sensing. Under a 0.9 T magnetic field, La0.8FeO3 shows a 134% increase in response to 40 ppm of NO2 in air. The paramagnetism of oxygen gas is found to provide a substantial magnetosensing contribution, as the use of nitrogen as the background gas diminishes the magnetoresponse of La0.8FeO3 by a factor of 3. Our findings establish magnetic field modulation as a powerful strategy for tuning gas sensor performance, opening new directions in sensing technologies.
研究领域:
材料科学
·
传感器
·
固体物理
·
气体检测
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2020
·
IF 3.871
Xianhua Zhang,Yinghui Su,Chunlei Pei,Zhi-Jian Zhao,Rui Liu,Jinlong Gong
Chemical looping steam reforming of methane (CL-SRM) has emerged as an attractive pathway on H 2 O splitting for H 2 production. However, this process still faces a major challenge in efficiently producing H 2 with high redox kinetics and yields. In this paper, the promoting effects of Ce 3+ substitution into LaFeO 3 redox catalysts on thermochemical H 2 O splitting as well as partial oxidation of methane are presented. An appropriate amount of Ce 3+ substitution in A site of LaFeO 3 (La 0.5 Ce 0.5 FeO 3 ) promotes the lattice oxygen conversion rate in methane partial oxidation step and boosts the reaction kinetics in H 2 O splitting step by enhancing the surface water activation and lattice oxygen mobility of the perovskite. In the CL-SRM process, the perovskite is reduced into Fe 0 /(La 0.5 Ce 0.5 ) 2 O 3 and Fe 0 /(La 0.5 Ce 0.5 )O 2- x phases in methane partial oxidation step and recovered to the original perovskite structure in H 2 O splitting step with simultaneous production of hydrogen, which maintains a reversible phase transformation during 100 redox cycles. As a result, the La 0.5 Ce 0.5 FeO 3 achieves high stability with the superior performance for syngas and hydrogen production. These findings provide the fundamental understanding on the synergy between the catalytic sites and enhanced lattice oxygen mobility for the promotion of H 2 O activation and hydrogen productivity in chemical looping process.
研究领域:
化学工程
·
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Yu Yang,Weifeng Gong,Yao Zhou,Tongtong Tang,Wenjie Liu,Chao Yao,ShiXiang Zuo,Xiazhang Li
This study synthesized LaFeO3 perovskite oxide with different cobalt doping ratios using the sol–gel method, followed by in situ hydrothermal treatment. The optimized LaFe0.8Co0.2O3 perovskite was then composited with linear multi-walled carbon nanotubes to investigate the structure, morphology, and electrochemical behavior of the composite material. In the composite material, linear MWCNTs were encapsulated into LaFe0.8Co0.2O3, and the content of MWCNTs had a significant impact on the performance of the composite material. When the ratio of LaFe0.8Co0.2O3 to MWCNTs reached 1 : 3, the electrochemical performance of the LaFe0.8Co0.2O3–MWCNT sample was optimal. Additionally, LaFe0.8Co0.2O3–MWCNTs-3 exhibited a high specific capacitance of 429.7 F g−1 at a current density of 1.0 A g−1, and the capacitance retention remained at 83.5% after 5000 cycles at a current density of 8.0 A g−1. In a symmetric electrode configuration, a specific capacitance of 151.6 F g−1 was achieved at the same current density, with a maximum energy density of 7.345 W h kg−1.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2026
·Vol. 31
·期 7
·1174
·
IF 5.1
Chao Song,Jiayue Xu,Hanqiong Luo,Quanli Hu
LaFeO3nanofibers and Ag-doped LaFeO3nanofibers were fabricated via an approach combining electrospinning with calcination. Their crystal structures, micro-morphologies, and chemical compositions were determined by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and Fourier-transform infrared spectroscopy. In addition, the conduction mechanisms and magnetic properties of the two samples were investigated using a semiconductor analyzer and a vibrating sample magnetometer. Rietveld refined X-ray diffraction analyses confirmed the orthorhombic structure. The two samples showed a nanofibrous structure. For Ag-doped LaFeO3, the conduction was dominated by the ohmic conduction mechanism in a low-resistance state, while it was governed by space-charge-limited current conduction in a high-resistance state. It also showed a high on/off ratio of 3.6 × 103. The coercivity and remanence values of Ag-doped LaFeO3were 200 Oe and 0.000404 emu g−1. This, thus, indicates the considerable application potential of Ag-doped LaFeO3for resistive random-access memory devices and magnetoresistive random-access memory devices.
✓ 已验证
DOI
PubMed
高影响因子
Processes
·
2026
·Vol. 14
·期 5
·836
·
IF 3.4
Jianwei Wang
Methane, a highly hazardous gas mixture when exposed to open flames, is commonly encountered in coal mines. Its primary component is CH4, making the detection of its concentration, especially under diverse environmental conditions, highly significant. In this study, La0.7Gd0.3Fe0.9Co0.1O3nanomaterials were prepared using an ultrasound-assisted hydrothermal method. Through dual-site synergistic regulation involving Gd doping at the A-site and Co doping at the B-site, rapid detection of CH4at low temperatures was achieved. At 150 °C, the sensor demonstrated a significantly enhanced response to 100 ppm CH4, with a sensitivity of 10.22. This value represents an approximately tenfold improvement over that achieved with pure LaFeO3. In addition, the sensor responded rapidly to the gas exposure within 6.3 s and recovered within 5.4 s, respectively, at the same gas concentration. Such swift recovery capabilities enable reliable detection across multiple environmental conditions. Moreover, the sensor not only shows excellent repeatability but also maintains a high response value of 9 even under highly humid conditions (95% RH). The performance enhancement is attributed mainly to lattice distortion induced by A-site doping and the increased active sites provided by B-site doping. The development of this sensor lays a foundation for future CH4detection and industrial safety applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2020
·Vol. 96
·期 2
·431-440
·
IF 2.008
Cao Ensi,Feng Yibiao,Guo Zhaoqing,Wang Huihui,Song Guoqing,Zhang Yongjia,Hao Wentao,Sun Li,Nie Zhongquan
To further improve the ethanol sensing performance of LaFeO 3 (LFO) nanoparticles, the co-doping of acceptor and donor at La and Fe sites at equal mole amount was designed to increase the oxygen adsorbing ability of the resultant nanoparticles. A series of (La,Ba)(Fe,Ti)O 3 nanoparticles, with the designed mole ratios of Ba/La (Ti/Fe) as 0, 0.25, 0.33, 0.50, and 1.0, were prepared by a citric sol–gel method. XRD confirmed the main phase of orthorhombic LFO, and the impurity phases of cubic BaTiO 3 (BTO) and orthorhombic BaCO 3 . The incorporation of Ba and Ti into the LFO lattice was verified by the increased unit cell volume of LFO upon more doping. TEM, BET, and XPS measurements indicated that the appropriate co-doping of Ba and Ti into the LFO lattice and the simultaneous existence of BTO and BaCO 3 resulted in smaller grain size, larger BET surface area, and thus higher concentration of adsorbed oxygen species than those in the pristine LFO nanoparticle. Among all (La,Ba)(Fe,Ti)O 3 sensors, the sensor based on the (La,Ba)(Fe,Ti)O 3 nanoparticles with the designed Ba/La = 0.50 exhibited the highest gas response and sensitivity toward ethanol at the prime working temperature of 132 °C, which was ascribed to the higher surface oxygen coverage contributed by the synergistic effect of co-doping and impurity phases on the number of surface active sites and oxygen adsorbing ability.
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
npj Clean Water
·
2025
·
IF 11.4
Lv Shiyu,Yuan Tian,Zhang Xueyan,Yang Pu,Fu Kerong,Yao Xia,Fu Weilin,Zhang Qiuxian,Luo Yanli,Wang Feng
Herein, LaFeO 3 photocatalysts (HX-LFO and SX-LFO) were synthesized using hydrothermal and sol–gel methods, respectively, for removing β-E2 from dairy cattle breeding wastewater. A combination of flocculation pretreatment and photocatalytic Fenton oxidation was used to achieve efficient β-E2 degradation. Results revealed that HX-LFO had high defect concentrations and achieved better photocatalytic Fenton oxidation efficiency for β-E2 than SX-LFO. The H0.7-LFO/H 2 O 2 /visible (Vis) system completely degraded 2 mg/L of β-E2 within 2 h and achieved a total organic carbon (TOC) mineralization rate of 99.7%. The intermediate products, degradation pathways, and ecological toxicity of β-E2 degradation were analyzed. The H0.7-LFO/H 2 O 2 /Vis system exhibited stable degradation performance when humic acid and multiple anions coexisted in the reaction solution. The developed system increased the β-E2 degradation rate to 83.38%–100%. Characterizations and density functional theory calculations revealed that the La-defect formation energy in La/O dual-defect LaFeO 3 was lower than that in LaFeO 3 containing only La defects. Moreover, O defects facilitated the formation of La defects that lowered the energy barrier for free-radical desorption, making it easier for free radicals to form and diffuse into the reaction solution. La/O dual-defect LaFeO 3 exhibited lower binding energy for β-E2, accelerating charge transfer within itself and from itself to β-E2.
研究领域:
环境催化
·
水污染控制
·
材料化学
·
环境功能材料
·
污染物降解机制
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 46
·期 4
·5315-5322
·
IF 3.45
Jinming Shi,Yue Chang,Yuanshun Tang,Xuanbo Wang,Xuefei Wang,Xiaochen Zhang,Jiangli Cao
A novel hydrogenated LaFeO 3 was fabricated and firstly used as photocatalyst in the application of visible-light photocatalytic decomposition of organic contaminant. Through the adjusting of annealing atmosphere and temperature, a series of treated LaFeO 3 with oxygen vacancies were obtained. Compared with untreated LaFeO 3 and argon treated LaFeO 3 , hydrogenated LaFeO 3 photocatalysts exhibited higher catalytic ability. This notably improved catalytic ability was mainly assigned to the formation of disordered layer on the surface of hydrogenated LaFeO 3 . The surface oxygen vacancies of LaFeO 3 caused by hydrogenation were beneficial to light absorption and separation of photogenerated carriers . In this system, we found the amount of surface oxygen vacancies had a direct impact on the catalyst ability of hydrogenated LaFeO 3 photocatalysts. In addition, the magnetic hydrogenated LaFeO 3 photocatalysts were stable, and reused after five times without obvious decrease of catalytic ability.
研究领域:
材料科学
·
光催化
·
环境化学
·
纳米材料
·
能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）