CERAMICS INTERNATIONAL
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2019
·Vol. 46
·期 4
·5315-5322
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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
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光催化
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环境化学
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纳米材料
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能源材料
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高影响因子
Journal of Science-Advanced Materials and Devices
·
2026
·Vol. 11
·期 3
·101222
·
IF 6.9
Dongxu Pan,Han Zheng,Li Zheng,Ling Zhang,Zhengfa Li,Qin Shi,Zhengdao Chen,Pengxi Xu,Yuyan Li
Capacitors with dielectrics as media have drawn great attention for the energy-storage application of high-power electronic systems. Sodium niobate (NaNbO 3 ) is the famous antiferroelectric with more phases and phase transitions, but without perfect recoverable energy storage density W rec and efficiency η . Herein, the relaxor ternary NaNbO 3 -LaFeO 3 -Sr(Fe 0.5 Nb 0.5 )O 3 ceramics are constructed by employing domain and domain wall engineering for integrating the merits of relaxors and antiferroelectrics. The phase transforms from orthorhombic P bcm to P mmn, and relaxor characters are revealed by the rotations of domains and the movements of domain walls. Particularly important, 0.88NaNbO 3 -0.096LaFeO 3 -0.024Sr(Fe 0.5 Nb 0.5 )O 3 demonstrates the great properties of high W rec as 2.645 J/cm 3 and super η as 80.7% at 230 kV/cm, less than the large electric breakdown strength E b of 235 kV/cm. These results suggest that NaNbO 3 -based ceramics are suitable for advanced capacitors, and the feasible strategy of domain and domain wall engineering is developed to provide novel energy storage dielectrics.
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CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Yidong Zhang,Jianfei Ding,Wei Xu,Min Wang,Rong Shao,Ying Sun,Baoping Lin
Sol-gel strategies have attracted enormous attention in synthesis of perovskite-type oxides due to their excellent chemical homogeneity and possibility in controlling the size, morphology, chemical properties and texture of particles. Nevertheless, their complicated, time-consuming process and weak control over porous structure impeded their potential use in preparation of energy storage materials. Herein, a simple and rapid strategy based on MOF gel (MIL-100-Fe) is developed for fabricating mesoporous perovskite-type materials. The MOF gel can be synthesized in controllable time duration without multi complexing agent, particular pH conditions and high temperature treatment. The synthesized perovskite LaFeO 3 has mesoporous structure and the pore size is concentrated at 2 nm, which contribute to a specific capacitance of 241.3 F g −1 at 1 A g −1 with retention of 68% even at a high current density of 20 A g −1 . Meanwhile, the all-solid-state symmetric supercapacitor shows a wide potential window of 1.8 V, and an outstanding energy density of 34 W h kg −1 at a power density of 900 W kg −1 with 92.2% capacitance retention after 5000 cycles, outperforming previously reported perovskite-type electrode materials and even comparable to MOF derived iron oxides. Thus, this study opens a new way to construct porous perovskite-type electrode materials for supercapacitors, which can combine the chemical homogeneity of sol-gel technology and the porous properties of MOF template together.
研究领域:
材料科学
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能源存储
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Jiang Jing,Yuedong Zhang,Pengchao Ge,Chengxing Cao,Xinyue Liu,Siyu Yang,Yuting Zeng,Panjie Li,Yichao Ding,Lei Wang
LaFeO 3 perovskites suffer from high electron-hole recombination, limiting their photocatalytic efficiency. This study introduces oxygen vacancies (OVs) into LaFeO 3 via dielectric barrier discharge (DBD) microplasma treatment, yielding OVs-LaFeO 3 (OVs-LFO). The DBD-enabled OVs induce Fe 3+ /Fe 2+ cycling, suppress charge recombination, and enhance reactive oxygen species generation, leading to efficient tetracycline degradation. Moreover, DBD reactivation effectively reverses catalyst deactivation, extending service life. Integrated into a landscape-adapted flow device, OVs-LFO maintained 94.00 ± 1.37% methylene blue removal over 3 h under sunlight and 73.01 ± 1.61% efficiency after 30 days, with minimal ecological toxicity. This work offers a practical defect-engineering strategy for sustainable photocatalytic wastewater treatment.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Wei Liang,Zongxue Yu,Kexi Liao,Huiyuan Liu,Zehua Cai,Yunfeng Tian,Lidan Deng,Jingyu Zheng
Novel Z-scheme heterojunctions for photocatalytic breakthroughs. • Dual functions: antibiotic degradation and H 2 O 2 generation. • Integrate environmental remediation with resource conversion. • Optimize key factors for balanced dual functionality. To address antibiotic pollution, high carrier recombination, and the risks associated with externally applied hydrogen peroxide, this study constructs a LaFeO 3 /CdS Z-scheme heterojunction on halloysite nanotubes (HNTs) via hydrothermal-calcination. HNTs prevent nanoparticle agglomeration, while the Z-scheme mechanism reduces recombination and preserves redox activity, enabling synergistic antibiotic degradation and H 2 O 2 production. The HLC catalyst achieves 91.73% tetracycline degradation, 333 μmol/L H 2 O 2 yield, and 80% E. coli antibacterial rate. It performs well under various water qualities and coexisting salts. Mechanistic analysis indicates that tetracycline degradation is primarily driven by the superoxide anion radical as the core active species, whereas hydrogen peroxide generation is hole-dominated; both processes are achieved through the synergistic interaction of multiple active species with photo-generated electrons. Furthermore, in situ-generated H 2 O 2 can undergo self-Fenton reaction with Fe 2+ in the material, further enhancing antibiotic degradation capacity. This study is the first to integrate HNTs with a LaFeO 3 /CdS Z-scheme heterostructure, overcoming the limitations of traditional catalysts. It achieves dual benefits-environmental remediation and in-situ green oxidant synthesis-offering a new design paradigm for low-cost, high-performance multifunctional photocatalysts with strong practical potential for water pollution control. Download: Download high-res image (184KB) Download: Download full-size image
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MICROCHEMICAL JOURNAL
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2026
·
IF 5.2
Boyan Fu,Yunzhi Kang,Baixi Xia,Hongji Liu
The detection of H 2 S, a highly toxic and corrosive gas prevalent in industrial processes, is imperative for safety and environmental monitoring. This necessitates the development of sensors exhibiting excellent sensitivity, quick response/recovery time, and superior selectivity. In this work, hollow and porous nanowires were fabricated via an ultrasound-assisted electrospinning method. By synergistically combining A-site deficiency engineering and B-site doping, a sensing material with high specific surface area and increased surface-adsorbed oxygen was achieved at a Mn doping level of 0.2. Operating at 130 °C, the gas-sensing material displays a high response of 113.5 toward 100 ppm H 2 S, approximately 15 times greater than that of pure LaFeO 3 along with rapid response/recovery time, respectively. The sensor also exhibits outstanding repeatability, selectivity, long-term stability, and humidity resistance. Moreover, it maintains remarkable sensing performance even at temperatures as high as 500 °C, indicating its potential for applications across a broad temperature range. Combined with theoretical calculations and experimental studies, the superior gas-sensing properties originate primarily from the synergistic effect between the nonstoichiometric behavior induced by A-site defects and the lattice distortion along with the increased active sites resulting from B-site doping. These findings pave the way for developing high-performance H 2 S sensing materials.
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CATALYSIS TODAY
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2019
·
IF 4.888
Huixian Zhong,Jiaming Wang,Kang An,Jie Yang,Zhi Ma,Hong Wang,Yuan Liu
A new catalyst for direct ethanol synthesis (DES) from syngas composed of Rh nanoparticles (NPs) highly dispersed on La-Ce-O modified LaFeO 3 which was loaded on SiO 2 support was studied in this work. Over the best catalyst 40.6 % of the reacted CO could be directly converted into ethanol with CO conversion of 14.2 % at 250 °C, 3 MPa and GHSV of 3900 mL (g cat h) −1 . The results indicated that adding cerium into LaFe 0.5 Rh 0.5 O 3 /SiO 2 resulted in La 1-x Ce x Fe 0.5 Rh 0.5 O 3 /SiO 2 , the incorporation of Ce effectively regulated the interface electronic states of Rh NPs . The well matched catalyzing process by the active sites of Rh 0 , Rh + (or Rh δ+ ) and the oxygen vacancies on the surface of LaFeO 3 , of those, Rh 0 dissociatively adsorbed CO and the latter two associatively adsorbed CO could effectively improve the activity and selectivity for DES. Moreover, the interaction of La-Ce-O and LaFeO 3 strengthened the CO adsorption on the oxygen vacancies on LaFeO 3 , which improved the capacity of assistance in activating CO associatively, thus further increasing the selectivity to ethanol. The catalyst exhibited excellent resistance to carbon deposition and sintering, attributing to the small size of Rh NPs and the carbon eliminating effect of La 2 O 3 and oxygen vacancies on the surface of LaFeO 3 .
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CURRENT APPLIED PHYSICS
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2012
·
IF 1.9
Peisong Tang,Yi Tong,Haifeng Chen,Feng Cao,Guoxiang Pan
Single phase perovskite LaFeO 3 nanoparticles are directly synthesized by a one-step microwave-assisted route without additional high temperature calcination process. The prepared sample is characterized by X-ray diffraction (XRD), field emission scanning microscope (FE-SEM), Brunauer–Emmett–Teller (BET) specific surface area measurement, diffuse reflectance spectroscopy (DRS) and Fourier transform infrared spectroscopy (FTIR). XRD and SEM show that the prepared LaFeO 3 is single phase perovskite and sphere-like shape. The DRS result shows that the prepared LaFeO 3 has strong visible-light absorption and an optical absorption onset of 525 nm, corresponding to an optical band gap of 2.36 eV. The photocatalytic experiment demonstrates that LaFeO 3 is highly visible-light photocatalytic active for the degradation of methylene blue. It is suggested that the narrow band gap and the strong visible-light absorption are responsible for the high visible-light photocatalytic activity of the prepared LaFeO 3 .
研究领域:
材料科学
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环境科学
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Lei Zhu,Jianan Wang,Jianwei Liu,Xin Chen,Zhicheng Xu,Qianyue Ma,Ze Wang,Jidong Liang,Shanshan Li,Wei Yan
In this work, a facile strategy to improve the formaldehyde (HCHO) sensing performance via introducing A-site cation deficiency of LaFeO 3 hollow oxides is reported. One-dimensional La x FeO 3 hollow nanofibers (L x FO HNFs, x = 1.0, 0.9, 0.8, 0.7, and 0.6) were prepared through electrospinning technique and subsequent calcination treatment. Benefiting from the hollow nanostructures and the existed A-site cation deficiency in L x FO HNFs, all the rapid charge transfer, abundant oxygen vacancies, and chemisorbed active sites could be achieved. Among all these L x FO HNFs sensors, the non-stoichiometric L 0.7 FO HNFs sensor delivered a high response value of 20.4 towards 100 ppm HCHO at 180 °C, which is over 3-fold higher than that of stoichiometric L 1.0 FO HNFs (6.3). Moreover, L 0.7 FO HNFs sensor has virtues of rapid response/recovery speed (23 /13 s), high selectivity, and good long-term stability toward HCHO. The smart HCHO detection device assembled with the L 0.7 FO HNFs gas sensor also enabled real-time and visible HCHO monitoring, highlighting its great potential application in the smart detection of hazardous gases.
研究领域:
材料科学
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环境科学
·
传感器技术
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高影响因子
ACS Sensors
·
2026
·
IF 10.9
Hongda Zhang,Liang Zhao,Yunpeng Xing,Chengchao Yu,Sihao Zhi,Teng Fei,Sen Liu,Haiyan Zhang,Tong Zhang
The tunable physicochemical properties of LaFeO3 show promise as a distinctive candidate for gas sensor applications. However, how to efficiently construct abundant active sites for LaFeO3 and clarify the sensing mechanism remains a challenge. Herein, we propose a modulating surface La vacancy strategy to improve the formaldehyde (HCHO) sensing performance of LaFeO3 by activating surface lattice oxygen. The LaFeO3 with abundant surface La vacancies was prepared by a urea-assisted sol−gel strategy (LFO-U-CA). The X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma optical emission spectroscopy (ICP-OES) results indicate the formation of surface La vacancies, activating more surface lattice oxygen, supported by O2 temperature-programmed desorption (O2-TPD) and H2 temperature-programmed reduction (H2-TPR). Experimentally, LFO-U-CA exhibits a high response value of 4.2 toward 10 ppm HCHO (2.5 times higher than LFO-CA@1.7), low theoretical limit of detection (LOD) of 3.3 ppb, high selectivity, and high stability and can distinguish low-concentration HCHO in simulated indoor gaseous environments. Furthermore, the LFO-U-CA sensor shows a higher response value of 31.4 to 10 ppm HCHO in Ar, confirming surface lattice oxygen as the active species. Importantly, the formation of more surface La vacancies not only reduces the electron cloud density of Fe and O sites, promoting Fe 3d−O 2p orbital hybridization, thereby strengthening Fe−O covalency and activating surface lattice oxygen, but also induces the exposure of additional surface active sites (Fe sites and oxygen vacancies thus formed) for adsorption of HCHO and O2. This work provides a new strategy to design high-performance perovskite oxide-based gas sensors by modulating catalytic activity.
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Yuhang Yao,Wenxue Wang,Wenjian Ding,Hongyu Wang,Qi Hu,Xuemeng Zhang,Xiaozhuang Liu,Jiayu Li,Lei Shi,Guo-Dong Li
Lu-doped LaFeO 3 nanoparticles are synthesized via a sol-gel method. • 7%Lu-LFO exhibits excellent sensitivity, stability and selectivity to acetone. • 7%Lu-LFO maintains remarkable acetone sensitivity at high relative humidity. • The greater charge transfer enhanced the adsorption of acetone on Lu-LFO. The design of highly sensitive metal oxide-based acetone sensors is of crucial importance for non-invasive diagnosis of diabetes. Herein, we report La 0.93 Lu 0.07 FeO 3 as high acetone sensing materials. The La 0.93 Lu 0.07 FeO 3 based sensor demonstrates a high response value of 82.1 toward 40 ppm acetone at 140°C and a low detection limit (200 ppb), along with good selectivity and long-term stability. Furthermore, La 0.93 Lu 0.07 FeO 3 maintains sufficient acetone sensing performance under high humidity (85% RH), allowing for accurate identification of diabetic patients versus healthy individuals in simulated human exhaled breath tests. Theoretical calculations reveal the importance of interfacial charge transfer between acetone molecule and Lu-LaFeO 3 surface to the acetone sensitivity. Acetone exhibits the greatest charge transfer and thus the strongest adsorption interaction on Lu-LaFeO 3 surface, which promotes gas molecule capture efficiency in acetone detection and accounts for the high sensing performance. This work presents a high-sensitivity acetone sensing material for non-invasive diabetic diagnosis and provides valuable insights for the rational design of high-performance perovskite-based sensors. Download: Download high-res image (153KB) Download: Download full-size image The La 0.93 Lu 0.07 FeO 3 sensor exhibits excellent acetone sensitivity and selectivity, enabling reliable detection even under high-humidity conditions. Mechanistic investigations revealed that Lu doping promotes interfacial charge transfer between the material and acetone molecules, which serves as the key driver for the enhanced gas-sensing performance.
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高影响因子
IONICS
·
2026
·
IF 2.6
Song Chao,Luo Hanqiong,Xu Jiayue,Song Yajiao,Hu Quanli
Resistive random access memory (RRAM) is widely recognized as a highly promising competitor for next-generation mainstream memory solutions. Rare earth perovskite oxides can meet the requirements of RRAM for high reliability of storage media, adjustable resistive switching, low power consumption, and high compatibility with CMOS processes. This study systematically explored the conduction mechanism of electrospun LaFeO 3 nanofibers by regulating electrode materials to enhance their potential application in the next-generation RRAM devices. The surface of LaFeO 3 nanofibers was relatively smooth and the diameter was approximately 460 nm. The XPS results revealed the existence of La 3+ , Fe 2+ /Fe 3+ and oxygen vacancies in LaFeO 3 . The conduction mechanism of LaFeO 3 as a switching medium in RRAM devices were analyzed by density functional theory (DFT). The results showed that LaFeO 3 exhibited favorable electrical conductivity due to the strong hybridization of Fe 3d-O 2p orbitals, and oxygen vacancies played a key role in the formation of conductive filaments. Among Ag/LaFeO 3 /Ag, Ag/LaFeO 3 /Pt and Pt/LaFeO 3 /Pt devices, the Ag/LaFeO 3 /Pt device possessed the best performance due to electrode optimization. The energy barrier of the Ag/LaFeO 3 /Pt device was relatively low which enabled the favorable resistive switching performance with both a moderate operating voltage and a relatively high on/off ratio. These findings indicated that the low energy barrier and efficient resistive switching characteristics of LaFeO 3 nanofibers induced by oxygen vacancies/Ag ions provided an important theoretical support for the development of low power and high-performance RRAM devices.
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