ACS Sensors
·
2025
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IF 9.1
Chaoqi Zhu,Kechen Zhou,Huiyu Su,Yazhou Yang,Jiahong Tang,Xiaoxia Wang,Wulin Song,Dawen Zeng
The development of highly sensitive electrolyte leakage monitoring sensors is critical for enabling early fault detection and ensuring the safe operation of lithium-ion battery (LIBs) systems. In this study, perovskite LaFeO3 hollow microspheres with an average diameter of 850 nm were synthesized via a hydrothermal method. Gas-sensing tests demonstrated that the LaFeO3 hollow microsphere sensor exhibited exceptional responsiveness to dimethyl carbonate (DMC) gas, achieving a remarkable response value of 67.9 toward 10 ppm DMC at an operating temperature of 150 °C. The sensor also showed a fast response/recovery rate (170/90 s), excellent selectivity, long-term stability, and a low detection limit of 20 ppb. This excellent gas-sensing performance may be attributed to the high specific surface area and well-developed mesoporous structure of the hollow structure. Moreover, it demonstrated rapid response capabilities in simulated leakage detection scenarios. This work presents a novel perovskite LaFeO3-based sensor that can effectively detect DMC gas leakage and provide an effective strategy for enhancing safety monitoring in LIB applications.
研究领域:
材料科学
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电化学
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传感器技术
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能源安全
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纳米材料
·
功能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Hongmei Chen,Xiaoqin Sun,Xiaoxiang Xu
Here we report two Ruddlesden-Popper type ferrite perovskites (SrO)(LaFeO 3 ) n (n = 1 and 2) which demonstrate p-type semiconductivity. Their crystal structure, optical absorption and other physicochemical properties have been systematically explored. Our results show that both ferrites crystallize in tetragonal symmetry with structural lamination along c axis. Efficient photocatalytic hydrogen production has been achieved for both samples under full range and visible light illumination. Better performance is noticed for LaSrFeO 4 with apparent quantum efficiency approaches 0.31% and 0.19% under full range and visible light illumination, respectively. The p-type semiconductivity is verified by their cathodic photocurrent as well as negative Mott-Schottky slop during Photoelectrochemical measurement. The relative lower activity for La 2 SrFe 2 O 7 compared to LaSrFeO 4 is likely due to its higher defect concentration which facilitates charge recombination. Both compounds exhibit anisotropic phenomenon for charge migrations according to theoretical calculations. Their p-type semiconductivity, strong visible light absorption, chemical inertness and high abundance of constituent elements signify promising applications in the field of solar energy conversion and optoelectronics.
研究领域:
材料科学
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能源转换技术
·
光电化学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Jiana Jing,Md. Nahid Pervez,Peipei Sun,Chengjin Cao,Bin Li,Vincenzo Naddeo,Wei Jin,Yaping Zhao
Although it can effectively degrade refractory organic pollutants, advanced oxidation processes (AOPs) can be seriously interfered with the co-existing substance in salinity water . Herein, three-dimensional hierarchical cobalt-doped LaFeO 3 perovskites (LaCo 0.5 Fe 0.5 O 3 ) micron spheres composed of nano-rods were hydrothermally synthesized and applied to activate peroxymonosulfate (PMS) for degrading bisphenol A (BPA). Nearly 100% BPA was removed by LaCo 0.5 Fe 0.5 O 3 /PMS system in presence of more than 50 mM Cl − within only 2 min compared that of 30 min without Cl − , which was attributed to reactive chlorine species (RCS) including Cl • and HOCl with higher oxidation capacity. •OH and SO 4 •− produced by LaCo 0.5 Fe 0.5 O 3 activating PMS played crucial roles as the source of RCS in LaCo 0.5 Fe 0.5 O 3 /Cl − /PMS system. The synergistic effect between ROS and RCS promoted by the enhanced oxygen vacancies and the efficient redox recycling of Fe III /Fe II and Co III /Co II . Other anions like SO 4 2− and NO 3 − hardly affected the BPA degradation. BPA degradation efficiency was also improved either in a wide pH range or in the presence of natural organic matters in salty water. This work also demonstrated the potential application of Fe Co bimetallic LaCo 0.5 Fe 0.5 O 3 activating PMS system for degradation of BPA or other organic micropollutants in seawater system.
研究领域:
环境科学
·
化学工程
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DOI
PubMed
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Zhe Bai,Zhenhua Wang,Tan Wang,Zeyu Wu,Ruilong Li,Xiaotian Gao,Yu Bai,Kening Sun
The partially filled d orbital of transition metal-based catalysts demonstrate excellent catalytic activity against polysulfides. However, an appropriate descriptor to reveal their structure-activity relationship is lacked. This study proposes a quantitative relationship between the e g occupancy of perovskite oxides and polysulfide catalytic activity, serving as an activity descriptor. LaCoO 3 , with a moderate e g occupation (t 2g 5 e g 1.08 ), demonstrates effective polysulfide anchoring and facilitated redox kinetics conversion compared to LaCrO 3 (t 2g 3 e g 0 ) and LaFeO 3 (t 2g 3 e g 2 ), showcasing exceptional catalytic performance. The degree of e g occupancy significantly influences the polysulfides adsorption strength, with empty or fully filled e g orbitals resulting in either strong or weak adsorption, respectively. LaCoO 3 -based batteries exhibit remarkable reversible capacity over 700 cycles at 1.0C, with a minimal capacity fading rate of 0.065 % per cycle. This work elucidates the crucial role of e g descriptor for evaluating the adsorption and conversion on polysulfides, offering insights into the development of innovative lithium-sulfur electrocatalysts.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 12.5
Zuyang Huang,Lianyang Huang,Shuohai Fang,Yunchuan Yang,Meidan Lai,Xin Zhong,Changzhong Liao,Zihao Wu,Jun Liu
Advanced oxidation processes (AOPs) based on photocatalysis and peroxymonosulfate (PMS) activation hold great promise for the remediation of organic wastewater. To overcome the limitation of narrow light utilization, sluggish PMS activation, and weak synergy between photocatalysis and PMS activation, the rational integration of transition-metal-mediated PMS activation with heterostructure engineering under light provides an efficient pathway for accelerating internal electric field construction and enhancing pollutant degradation. Herein, a C-LaFeO 3 anchored Co-doped g-C 3 N 4 (C-LFO/Co-CN) catalyst was synthesized via a multi-step in situ calcination strategy. When the mass ratio of C-LFO: Co: CN was optimized to 10:1:100, the C-LFO/Co-CN catalyst exhibited optimal photo-Fenton-like synergistic performance, achieving an initial 30-minute degradation rate 5.8 times higher than that under visible light alone. It was revealed that the Co sites directly interact with PMS to form high-valent cobalt (Co(IV) = O). Furthermore, the reconstruction of the internal electric field establishes a Z -scheme heterojunction. This configuration drives the directional migration of photogenerated electrons under illumination, promoting the direct involvement of photogenerated holes from the C-LFO valence band in the degradation of NOR. The influx of photogenerated electrons in Co-CN facilitates the reduction of Co valence states, while in C-LFO, the Fe sites further participate in the formation of a Co Fe valence state cycling system under the activation of PMS. These synergistic dual-metal redox cycles ultimately promote the highly efficient degradation of NOR in the (C-LFO/Co-CN)-PMS-Vis system. This study provides new mechanistic insights and theoretical guidance for efficient photocatalysis–PMS synergistic catalysts for wastewater treatment.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yujie Wu,Danrui Pan,Jinlin Yin,Shaoke Chen,Jin Wang,Ahmed Mahmoud Idris,Zhengquan Li
Designing compact heterojunctions with optimized light absorption and carrier separation is a promising approach to realizing economically viable CO 2 photoreduction, yet it requires intricate structural and electronic engineering. Herein, a compact 0D/2D heterojunction was constructed by growing CsPbBr 3 nanocrystals (NCs) in situ on ultrathin porous nanosheets of Ni-doped LaFeO 3 . The resulting Ni-doped LaFeO 3 /CsPbBr 3 heterojunction exhibits a broad light absorption range. Mechanistic investigations reveal that the charge transfer follows a direct Z-scheme mechanism, thereby enabling highly efficient charge separation and transport. As a result, the optimized LaFe 0.74 Ni 0.26 O 3 /CsPbBr 3 exhibited a remarkable CO yield of 49.5 μmol g −1 h −1 with an electron consumption rate of 107.8 μmol g −1 h −1 , which is twice that of its undoped heterojunction and 5.5 times higher than pristine CsPbBr 3 NCs, setting a new benchmark among reported solid–gas CO 2 reduction systems with visible light. This work highlights the synergistic benefits of heteroatom doping and heterojunction engineering in enhancing photocatalytic performance, offering valuable insights for the development of efficient photocatalysts for solar-driven CO 2 photoreduction.
研究领域:
光催化
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材料科学
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二氧化碳还原
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纳米材料
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能量转换
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Chenhui Qiu,Lei Wang,Ruijie Chen,Jie Zhang,Jing Ding,Jinfeng Zhang,Hui Wan,Guofeng Guan
Perovskite-type LaFeO3 is regarded as a potentially efficient visible-light photocatalyst owing to its narrow bandgap energy and unique photovoltaic properties. However, the insufficient active sites and the unsatisfactory utilization of photogenerated carriers severely restrict the realistic application of pure LaFeO3. Herein, we fabricated a series of LaxFeO3−δ nanofibers (x = 1.0, 0.95, 0.9, 0.85, 0.8) with an A-site defect via sol–gel combined with the electrospinning technique. Wherein, the nonstoichiometric La0.9FeO3−δ possessed the highest CH3OH yield of 5.30 μmol·g–1·h–1 with good chemical stability. A series of advanced characterizations were applied to investigate the physicochemical properties and charge-carrier behaviors of the samples. The results illustrated that the one-dimensional (1D) nanostructures combined with the appropriate concentration of vacancy defects on the surface contributed to the radial migration of photogenerated carriers, inhibited the recombination of carriers, and provided more CO2 adsorption-activation sites. Furthermore, density functional theory (DFT) calculations were employed to reveal the influence mechanism of vacancy defects on LaFeO3. This work provides a strategy to enhance the performance of photocatalytic CO2 reduction by modulating the induced oxygen vacancies caused by the A-site defect in perovskite oxides.
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DOI
PubMed
高影响因子
Nano Research
·
2023
·
IF 9.9
Cao Chi,Li Jinshuo,Hu Yang,Zhang Lin,Yang Wensheng
Three kinds of metal atoms with different valence electronic configurations, Bi (6s 2 6p 3 ), Y (4d 1 5s 2 ), and Ce (4f 1 5d 1 6s 2 ), were selected to investigate the effect of A-site (La 3 +) doping on electronic band structure, photoelectric properties, and photocatalytic performance of LaFeO 3 perovskite. It was identified that the Bi doped LaFeO 3 presented significantly improved photocatalytic activity towards the reduction of CO 2 , while the Y or Ce doped LaFeO 3 displayed decreased photocatalytic activity compared to the pristine LaFeO 3 . It was revealed that doping of all the three metal atoms resulted in narrowed band gap and thus extended light absorption of LaFeO 3 by lowering its conduction band minimum (CBM). The recombination rate and mobility of the charge carriers were represented by the relative effective mass (D) between holes and electrons for pristine and A-site doped LaFeO 3 . The doping of Bi resulted in increased D value, attributed to the Bi 6s electron states at the valence band maximum (VBM), and thus promoted separation and transfer of the charge carriers and improved photocatalytic activity of LaFeO 3 . In contrast, the doping of Ce resulted in significantly decreased D value, induced by the highly localized Ce 4f hole states at the CBM, and thus higher recombination rate of the charge carriers and decreased photocatalytic activity of LaFeO 3 . Furthermore, the Y doped LaFeO 3 with a slightly decreased D value presented slightly increased recombination rate of the charge carriers and thus decreased photocatalytic activity. Such a work provides new insights into the A-site doping in LaFeO 3 perovskite, which should be helpful for optimizing the electronic band structure and activity of perovskite-type photocatalysts at atomic level.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Sheng Shen,Yu Fan,Bowen Lu,Cong Luo,Xiaoshan Li,Liqi Zhang
La promotes surface electron transfer in NiFe 2 O 4 to form La-Fe-O precursors. • In-situ LaFeO 3 perovskite scaffold physically confines and anchors active grains. • 20% La doping optimizes the synergy between active site exposure and stability. • Lattice reconstruction enables a high CO 2 conversion of 73% at 700 °C. • Stable CO 2 conversion above 97% over 30 h continuous operation. Catalytic hydrogenation of CO 2 to CO via the reverse water-gas shift (RWGS) reaction provides an attractive route for renewable hydrogen utilization and carbon recycling. NiFe 2 O 4 spinels are promising RWGS catalysts owing to abundant oxygen vacancies and excellent CO 2 activation capability. However, the reconstruction-induced aggregation of Fe-Ni active phases under reaction conditions severely limits durability. Herein, La modification regulates phase reconstruction, surface basicity, and oxygen environments. La-induced electron transfer promotes Ni reduction, modifies Fe-O coordination, and enriches defect-related and adsorbed oxygen species, enhancing CO 2 activation. Meanwhile, LaFeO 3 anchors Fe-Ni nanocrystals and suppresses FeO accumulation and sintering. Consequently, 20La 2 O 3 -NiFe 2 O 4 achieves 73.0% CO 2 conversion at 700 °C, and 2.33 times that of pristine NiFe 2 O 4 , while retaining approximately 97% of its initial conversion after 30 h. This work provides an effective strategy for active-phase stabilization, advancing the development of durable catalysts for efficient CO 2 hydrogenation. Download: Download high-res image (317KB) Download: Download full-size image
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DOI
高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Yanan Niu,Xiaoxuan Zhou,Tai Peng,Yuguang Lv,Kuilin Lv
A dual-functional TCCN-LaFeO₃ Z-scheme heterojunction is constructed for synchronous tetracycline degradation and gallic acid detection. • The composite achieves 95.27% tetracycline removal within 120 min and excellent reusability via Z-scheme charge transfer. • Sensitive and selective colorimetric detection of gallic acid is realized with a low detection limit of 0.32 μM. • The bifunctional material shows satisfactory practical performance in real water and pharmaceutical samples. TCCN-LaFeO 3 (TCCN refers to graphite carbon nitride modified by tetracyanoethylene) composite materials were successfully prepared using a simple hydrothermal method. The photocatalytic degradation performance of the composite was investigated using tetracycline (TC) as the target pollutant. The results indicate that under conditions of a catalyst loading of 40 mg, an initial TC concentration of 20 mg/L, a solution pH of 7, under visible-light irradiation from a 250 W xenon lamp with a 400 nm cut-off filter (400–800 nm), the tetracycline degradation rate reached 95.27% after 120 min of reaction. The degradation process followed a first-order kinetic model with a rate constant of 0.0243 min −1 . Furthermore, the TC degradation rate remained above 85% after five reuse cycles, demonstrating excellent stability. Additionally, when this composite was used for the colorimetric detection of gallic acid (GA), a good linear relationship (R 2 = 0.993) was observed between the GA concentration and the absorbance of the reaction system at 652 nm over the concentration range of 0–110 μM, with a detection limit as low as 0.32 μM. Interference and spiked recovery experiments using actual samples demonstrated that this method exhibits good selectivity and accuracy, with recovery rates ranging from 98.3% to 101.4%. The TCCN-LaFeO 3 composite prepared in this study holds significant application value in the fields of tetracycline degradation in water and the rapid detection of gallic acid. Download: Download high-res image (167KB) Download: Download full-size image
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 40
·31637-31647
·
IF 3.84
Guilong Liu,Dongming Pan,Ting Niu,Ang Cao,Yizhi Yue,Yuan Liu
LaFeO3 supported Cu–Co bimetallic catalysts with high surface area and mesoporosity were prepared by impregnation combined with nanocasting method, and the resulting catalysts were used for higher alcohol synthesis (HAS) from syngas. These catalysts were characterized by using N2 adsorption and desorption, X-ray diffraction, temperature programmed reduction, transmission electron microscopy and energy dispersive spectrometry techniques. The results showed that the catalysts were highly active and selective to higher alcohols, and meanwhile stable for HAS. Characterization results indicated that Cu–Co was in the state of a solid solution alloy in the reduced catalysts, and the formation of Cu–Co alloy led to the high selectivity to higher alcohols. The elements in the catalysts were uniformly mixed and in interaction, thus sintering of the nanoparticles in the catalysts was restricted, resulting in a good stability. The high activity was mainly attributed to the high surface area and mesoporosity. Compared with Cu–Co/LaFeO3 prepared by conventional methods, Cu–Co/LaFeO3 with higher surface area and mesoporosity exhibited better activity and higher selectivity to higher alcohols. This design scheme may be applied to other bimetallic catalysts, and many transition metal ions can act as the lattice ions of perovskite-type oxides besides copper and cobalt.
研究领域:
催化化学
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材料科学
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化学工程
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纳米技术
·
能源化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
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IF 8.3
Zhichao Xu,Hongyang Guo,Jinhua Gan,Taosif Ahmed,Teng Wang,Jingxin Liu,Meng Mei,Si Chen,Jinping Li
Excessive phosphate and tetracycline (TC) contaminants pose a serious risk to human health and the ecological environment. As such exploring the simultaneous adsorption of phosphate and TC is garnering increasing attention. In this study, an efficient lanthanum ferrate magnetic biochar (FLBC) was synthesised from crab shells using an ultrasound-assisted sol–gel method to study its performance and mechanisms for phosphate and TC adsorption in aqueous solutions in mono/bis systems. According to the Langmuir model, the developed exhibited a maximum adsorption capacity of 65.62 mg/g for phosphate and 234.1 mg/g for TC (pH:7.0 ± 0.1, and 25 °C). Further, it exhibited high resistance to interference and pH suitability. In practical swine wastewater applications, whereby the concentrations of phosphate and TC are 37 and 19.97 mg/L, respectively, the proposed material demonstrated excellent performance. In addition, electrostatic adsorption, chemical precipitation and ligand exchange were noted to be the main mechanisms for phosphate adsorption by FLBC, whereas hydrogen bonding and π-π interaction were the main adsorption mechanisms for TC adsorption. Therefore, this study successfully prepared a novel and efficient adsorbent for phosphate and TC.
研究领域:
环境科学
·
材料科学
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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）