Search query: LaFeO

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abstract: Abstract High voltage LiNi 0.5 Mn 1.5 O 4 has been considered as one of the most promising cathode candidate for LIBs due to its excellent energy density and power density, but the attack of HF on the material and dissolution of Mn ions into electrolyte can cause structure collapse and serious capacity fading of the cathode. In this work, a semiconductor of LaFeO 3 was coated on the surface of polyhedral LiNi 0.5 Mn 1.5 O 4 via a wet chemical method. LaFeO 3 coated at the surface of LiNi 0.5 Mn 1.5 O 4 significantly protects the cathode from the corrosion of HF and alleviates the dissolution of Mn ions into organic liquid electrolyte during (dis)charge processes. The 2.0 wt% LaFeO 3 coated LiNi 0.5 Mn 1.5 O 4 cathode exhibits much better cycling stability, rate capability, and elevated temperature stability than the pristine: capacity retention of 97.71% at 1 C after 100 cycles vs. that of 90.96% rate capability of 111.9 and 99.6 mAh g 1 at high C rates of 5 C and 10 C vs. that of 90.6 and 76.4 mAh g 1 respectively; and high temperature capacity retention of 93.29% at 1 C after 100 cycles vs. that of 69.9% Present study provides a facile method to mitigate the dissolution of Mn ions into electrolyte for LiNi 0.5 Mn 1.5 O 4 resulting in excellent cycling performance and rate capability.
author_names: Jirong Mou

Yunlong Deng

Lihua He

Qiaoji Zheng

Na Jiang

Dunmim Lin
title: Critical roles of semi conductive LaFeO 3 coating in enhancing cycling stability and rate capability of 5 V LiNi 0.5 Mn 1.5 O 4 cathode materials
year: 2018

abstract: Abstract Z scheme g C3N4/LaFeO3 heterojunction photocatalysts were prepared by calcining the uniformly mixed g C3N4 nanosheets and LaFeO3 nanoparticles at 300 degC for 1 h. The as prepared g C3N4/LaFeO3 composites were systematically characterized by XRD, SEM, TEM, XPS, UV vis DRS, PL spectroscopy, EIS and photocurrent response. It is demonstrated that LaFeO3 nanoparticles (average size: ca. 35 nm) are uniformly assembled onto the surface of g C3N4 nanosheets through chemical bonding, leading to the formation of g C3N4/LaFeO3 heterojunctions. The photocatalytic, Fenton and photo Fenton performances of the samples were investigated by degrading RhB using simulated sunlight as the light source. Compared to bare LaFeO3 and g C3N4, the g C3N4/LaFeO3 composites exhibit significantly enhanced photocatalytic and photo Fenton degradation of the dye, and the maximum activity is observed for the 15%g C3N4/LaFeO3 composite. Moreover, the photo Fenton performance of the composites is much higher than the photocatalytic or Fenton performances. The much improved photo fenton activity is ascribed to the efficient separation of photogenerated electron hole pairs due to the Z scheme electron transfer and the synergistic effect between LaFeO3 and g C3N4. *OH radicals were examined by PL spectroscopy using TPA as a probe molecule, clearly revealing the *OH generation, and moreover, the *OH yield and the dye degradation rate show a similar variation between different cases of the catalysis process. This suggested that *OH is the dominant reactive species causing the dye degradation. The underlying photo Fenton mechanism of the composites is discussed.
author_names: Yongchun Ye

Hua Yang

Xiangxian Wang

Wangjun Feng
title: Photocatalytic, Fenton and photo Fenton degradation of RhB over Z scheme g C3N4/LaFeO3 heterojunction photocatalysts
year: 2018

abstract: Au and Cl comodified LaFeO3 nanoparticles were prepared by a citric sol gel method through the addition of HAuCl4 into precursor. As evidenced by XRD and TEM, the addition of HAuCl4 suppressed the
author_names: Ensi Cao

Aiting Wu

Huihu Wang

Yongjia Zhang

Wentao Hao

Li Hui Sun
title: Enhanced Ethanol Sensing Performance of Au and Cl Comodified LaFeO3 Nanoparticles
venue: ACS Applied Nano Materials
year: 2019

abstract: Perovskite type lanthanum iron oxide, LaFeO3, is a p type semiconductor that can achieve overall water splitting using visible light while maintaining photostability. These features make LaFeO3 a p.
author_names: Garrett P Wheeler

Valentin Urena Baltazar

T J Smart

Andjela Radmilovic

Yuan Ping

Kyoung-Shin Choi
title: Combined Theoretical and Experimental Investigations of Atomic Doping To Enhance Photon Absorption and Carrier Transport of LaFeO3 Photocathodes
venue: Chemistry of Materials
year: 2019

abstract: Perovskite type oxides lanthanum ferrite (LaFeO3) photocatalysts were successfully prepared by a facile and cost effective sol gel method using La(NO)3 and Fe(NO)3 as metal ion precursors and citric acid as a complexing agent at different calcination temperatures. The properties of the resulting LaFeO3 samples were characterized by powder X ray diffraction (XRD) energy dispersive X ray spectroscopy (EDXS) UV Vis diffuse reflectance spectroscopy (DRS) X ray photoelectron spectroscopy (XPS) Fourier transform infrared spectra (IR) transmission electron microscopy (TEM) N2 adsorption/desorption and photoelectrochemical tests. The photoactivity of the LaFeO3 samples was tested by monitoring the photocatalytic degradation of Rhodamine B (RhB) and 4 chlorophenol (4 CP) under visible light irradiation, the highest photocatalytic activity was found for LaFeO3 calcined at 700 *C, which attributed to the relatively highest surface area (10.6 m2/g) In addition, it was found from trapping experiments that the reactive species for degradation were superoxide radical ions (O2) and holes (h+ Photocurrent measurements and electrochemical impedance spectroscopy (EIS) proved the higher photo induced charge carrier transfer and separation efficiency of the LaFeO3 sample calcined at 700 *C compared to that that calcined at 900 *C. Band positions of LaFeO3 were estimated using the Mott Schottky plots, which showed that H2 evolution was not likely.
author_names: Mohammed Ismael

Michael Wark
title: Perovskite type LaFeO 3 Photoelectrochemical Properties and Photocatalytic Degradation of Organic Pollutants Under Visible Light Irradiation
year: 2019

author_names: Liu Qing Sheng Liu Qing-sheng

Tan Cheng Liang Tan Cheng-liang

Cheng Hua Jin Cheng Hua-jin

Duan Xu Duan Xu

Chang Qing Chang Qing

Chen Jiang An Chen Jiang-an
title: (Mg, Cr)Gong Xian LaFeO 3 Ji Fu He Fen Ti De Neng Dai Jie Gou Ji Qi Re Fu She Xing Neng
year: 2019

abstract: Preparation and characterization of Al2O3 dopped LaFeO3 thick film ceramics for ethanol gas sensor applications has been conducted. LaFeO3 ceramics were made by co precipitation method with doping variation of Al2O3 0% and 3.75% mole of the main ingredients LaFeO3 (La2O3 and Fe2O3) Screen printing technique was employed to make thick film ceramics of LaFeO3 and Al2O3 dopped LaFeO3. The ceramics were calcined at temperature of 60 0C. The analysis results of the characteristics of crystals using X Ray Difraction (XRD) showed that the made ceramics made had cubic phase with a lattice parameter a=b=c=39.52nm. The addition of 3.75% mole of Al2O3 did not change the crystal phase and lattice parameter values of LaFeO3. The crystallite size of LaFeO3 was 52.17nm while the crystallite size of Al2O3 doped LaFeO3 was 44.52nm. The analysis results of morphological structure ceramics of LaFeO3 and Al2O3 doped LaFeO3 using Scanning Electron Microscopy (SEM) possessed a grain size of each 0:40 mm and 0.25mm. The electrical characterization results of LaFeO3 thick film ceramics indicated the sensitivity of the sensor increased along with the addition of ethanol gas concentration. The maximum sensitivity value of LaFeO3 thick film ceramics ceramic thick film LaFeO3 and Al2O3 doped LaFeO3 at 300ppm was 4.34 at 330 0C and 6.08 at 3500C. The thick film ceramics with the addition of 3.75% mole of Al2O3 has a higher sensitivity and potential to be used as ethanol gas sensor.
author_names: Endi Suhendi

Neng Astri Lidiawati

Dani Gustaman Syarif

Andhy Setiawan
title: Synthesis and Characterization of Al 2 O 3 Doped LaFeO 3 Thick Film Ceramics for Ethanol Gas Sensing Application
year: 2019

author_names: Chenyi Gu

Min Gu

Zhoushen Yuan

Yuefeng Nie

Peng Wang

Xiaoqing Pan
title: Atomic Resolutin Study of Charge Transfer at the LaTiO 3 /LaFeO 3 Interface
year: 2019

author_names: Takuya Okamoto

Kyoya Hiraoka

Takehiro Teraji

Kodai Sakamoto

Nobuyuki Iwata
title: Influence of Oxidation Degree of CaFeO x and LaFeO 3 Thickness on Magnetic Property of LaFeO 3 /CaFeO x Superlattices and Multilayers
year: 2019

abstract: The physical properties of perovskite oxides are strongly influenced by their stoichiometry and one of the key features of these materials is the tunability of their functionality by controlling the interplay between the compositional and structural properties. Here, the effects on the photoelectrochemical (PEC) water splitting properties of ferroelectric LaFeO3 thin films obtained at different oxygen partial pressures during growth are reported in conjunction with the morphological, optical and structural features. The LaFeO3 thin films have been deposited by pulsed laser deposition on Nb:SrTiO3 substrates. The strong dependence of the photocurrent values Jphoto on the growth conditions is revealed by the photoelectrochemical measurements. Strong variations of the lateral coherence lengths L| of LaFeO3/Nb:SrTiO3 with the oxygen partial pressure values are noticed from the X ray diffraction (XRD) analysis. All the films are heteroepitaxial with small tensile strain levels detected in the crystalline structure, but only for a narrow interval of oxygen partial pressures the LFO/STON thin films show high quality crystalline structure with large lateral coherence length L| and photoelectrochemical currents.
author_names: Florin Andrei

Iulian Boerasu

Ruxandra Birjega

Antoniu Moldovan

Maria Dinescu

Valentin Ion

Cristian N Mihailescu

Nicu Doinel Scarisoreanu

Victor Leca
title: The effects of the oxygen content on the photoelectrochemical properties of LaFeO3 perovskite thin films obtained by pulsed laser deposition
venue: Applied Physics A
year: 2019