KEY ENGINEERING MATERIALS
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2017
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IF 0
Fang Fang Peng,Min Min Jin,Chun Yu Long,Pei Song Tang,Hai Feng Chen
Using yttrium nitrate (Y(NO3)3·6H2O), manganese acetate (MnC4H6O4·4H2O), citric acid (C6H8O7·H2O) and urea (CH4N2O) as major raw materials, the YMnO3 was prepared by microwave assisted method. The structure and morphology of samples were characterized by thermogravimetric analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform infrared (FT-IR). The results show that the YMnO3 was successfully prepared by microwave process and calcined from 750°C to 1050°C. When the calcination temperature is 850°C, the grain of YMnO3 has good uniformity and the average grain size of 80-100 nm. Under UV-light irradiation, the photocatalytic activity of YMnO3 was studied for methyl orange (MO) used as simulated sewage. The photocatalytic experiment show that the YMnO3 exhibited excellent photocatalytic activity for degradation methyl orange.
研究领域:
材料科学
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环境科学
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DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yong Zhou,Jiamei Liu,Xudong Zhao,Bin Yang,Bing Li,Xiaoyang Liu
Because of their unique electrical and magnetic properties, the perovskite multiferroic materials exhibit significant potential in spintronic device applications. However, synthesizing room-temperature multiferroic materials with robust magneto-electric coupling effects remains a major challenge. In this work, Yb 3 + , with an ionic radius slightly smaller than Y 3+ , was selected for A -site doping in the h -YMnO 3 , which has a high ferroelectric transition temperature (T C ∼ 900 K) and a low antiferromagnetic transition temperature (T N ≤ 70 K). This similar ionic radius allows Yb to substitute the Y site effectively while introducing distinct electronic states, thereby optimizing the structure and multiferroic properties of h -YMnO 3 without significantly altering the crystal structure. A series of Yb-doped Y 1- x Yb x MnO 3 ( x = 0, 0.1, 0.2, 0.3, 0.4, 0.5 and 1) materials were synthesized via conventional solid-phase reaction. The effects of Yb doping on the structure, magnetism, and ferroelectricity of h -YMnO 3 were studied. X-ray diffraction (XRD) and corresponding XRD refining results show that as Y 3+ is replaced by Yb 3+ with smaller radii, the cell parameters and cell volume of Y 1- x Yb x MnO 3 decrease, the cell is compressed, and the lattice structure of Y 0.5 Yb 0.5 MnO 3 obtained under the condition of Yb semi-doping changes significantly. Subsequent magnetic and room-temperature ferroelectric test results show that the Y 1- x Yb x MnO 3 series samples have anti-ferromagnetic ground states. In particular, the proper inclination of Mn 3+ ions in the double perovskite structure of Y 0.5 Yb 0.5 MnO 3 generates strong Dzyaloshinskii-Moriya (DM) interactions, resulting in relatively strong antiferromagnetism. The antiferromagnetic Neel temperature (T N ) from 37 K to 41 K. Yb 3+ -induced inclined ferroelectricity enables Y 0.8 Yb 0.2 MnO 3 to achieve the highest ferroelectric polarization of 0.030 µC cm −2 , which is 180 % greater than that of h -YMnO 3 . The results demonstrate that Yb doping plays a crucial role in regulating the structure and multiferroic properties of h -YMnO 3 , offering a novel strategy for developing room-temperature multiferroic materials with robust magneto-electric coupling.
研究领域:
材料科学
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凝聚态物理
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DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2025
·Vol. 14
·期 2
·027005
·
IF 2.2
Wenhao An,Xinru Chang,Song Guo,Jianing Zhang,Huadong Cui,Zhendong Tang
Premixed stagnation flame method was used to synthesize Yttrium manganate (YMnO3) nanoparticles to investigate the precursor species' effect on the resulting products' physical phase formation. In addition, the sensitivity of sensors constructed with the most efficient combination of precursors for detecting hydrogen sulfide (H2S) was evaluated. Based on thermal breakdown and infrared spectra analysis, Y(NO3)3·6H2O and (CH3COO)2Mn·4H2O have been shown to be the best precursors. The resulting YMnO3 phase exhibited the highest purity, with numerous small tetrahedral particles averaging 20 nm in size attached to the surface of larger spherical particles. The assembled particles displayed a uniform size distribution ranging from 400 to 600 nm. The YMnO3 sensors showed the most favorable response to 30 ppm H2S gas at 220 °C, achieving a response value of 2.94. It demonstrates excellent selectivity, repeatability, and long-term stability. The premixed stagnation flame method can be used to fabricate nanoparticles with complex composition or structure at low cost, such as hollow structure, core–shell structure or multivariate metal oxide. The porous structure of the synthesized spherical YMnO3 nanoparticles has the advantages of small particle size and large specific surface area, showing excellent gas sensitive properties.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Mengwei Tian,Xiangjun Liu,Ao Gong,Shan Zhang,Guangcheng Wang,Pei Han,Yong Li,Xiaojie Lou,Xihong Hao
The utilization of ferroelectric photovoltaic effect is thought to be an effective strategy to design novel self-powered photodetectors. However, the low photocurrent output due to the incompatibility between high intrinsic ferroelectric polarization and narrow bandgap is a major disadvantage that restricts photodetection performances. Here, high-efficiency photodetection properties are achieved in a hexagonal Y 1- x Bi x MnO 3 ferroelectric self-powered photodetector using a multiscale polarity structure optimization strategy. Particularly, the photodetector based on Y 0.95 Bi 0.05 MnO 3 (YBMO5) can work in a wide band ranging from ultraviolet to near infrared with the maximum responsivity and detectivity up to 0.60 A/W and 2.50 × 10 12 Jones, respectively, with the fast response time of only 0.3/0.4 ms, which are superior to the traditional ferroelectric perovskite photodetectors. The excellent photodetection performances originate from the enhanced photocurrent output, owing to simultaneously achieving big light absorption and robust photogenerated carrier separation and transport. It is demonstrated that Bi doping tunes crystal lattice , domain structure and the interface state, which effectively enhance macroscopic polarity in the condition of nearly unchanged bandgap. Moreover, a denser conductance network of grain boundary is constructed by decreasing grain size, which provides more transport paths for the photogenerated carriers. This work opens up a promising route for the design of high-performance ferroelectric photodetectors.
研究领域:
材料科学
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光子学
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电气工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2026
·Vol. 37
·期 12
·892
·
IF 3.2
Fan Shumin,Zhang Shan,Yang Xinxiang,Gao Xing,Song Xin,Lu Chunxiao,Zhang Liwen,Li Yong
Ferroelectric materials offer a transformative solution for developing high-responsivity photodetectors by leveraging their unique photovoltaic effect. However, the low output photocurrent that is associated with carrier separation efficiency is the main issue that restricts the applications of ferroelectric photodetectors. Here, constructing a MoS 2 /YMO/LSMO heterostructure, a high photocurrent density of 11.9 mA/cm 2 was achieved under standard solar illumination, representing an approximate 3.4-fold increase compared to the 3.50 mA/cm 2 observed in the YMO/LSMO structure. The significantly enhanced photocurrent output further improved the heterojunction’s photodetection performance, exhibiting a responsivity ( R ) of 0.72 A/W and a specific detectivity ( D * ) of 2.28 × 10 12 Jones. Furthermore, the device demonstrated excellent broad-spectrum detection capability, with a photoresponse range spanning from the ultraviolet (UV) to near-infrared (NIR) spectral region. The microscopic mechanism underlying the performance enhancement originates from the built-in electric field at the MoS 2 /YMO interface strengthening the driving force for carrier separation, while MoS 2 acting as an electron transport layer significantly improves the transport efficiency of charge carriers. This work provides novel insights into developing high output photocurrent photodetectors.
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DOI
高影响因子
Applied Materials Today
·
2026
·
IF 7
Shuai Chen,Song Guo,Quanwei Li,Xinru Chang,Zhendong Tang,Dianxiang Zhou,Zhengwen Dong
Flame synthesis method for producing hollow YMnO3 spherical nanomaterials. • The sensor exhibits a response value of 4.81 toward H2S at its optimal operating temperature of 220°C. • The sensor exhibits excellent selectivity for H2S gas detection among four interfering gases. • The sensor exhibits a response of 1.31 to 1ppm H2S at its minimum detection limit. Hydrogen sulfide (H 2 S) is a highly toxic, flammable, and corrosive gas that poses a serious threat to human health and industrial safety. Metal-oxide-semiconductor (MOS) sensors offer a highly promising technical solution for precise H₂S monitoring due to their advantages of simple fabrication, rapid response, and strong stability. This study synthesized hollow-structured YMnO 3 spherical nanostructures using the premixed stagnation flame method. By systematically regulating the O 2 /C 2 H 4 equivalence ratio and carrier gas flow rate, the effects of different flame conditions on the product morphology and gas-sensing properties were investigated. Experiments demonstrate that YMnO 3 synthesized under conditions of an O 2 /C 2 H 4 equivalent ratio of 5.19 and a carrier gas flow rate of 8.16 L/min exhibits the most pronounced hollow structure. At an optimal operating temperature of 220°C, the sensor has a maximum response value of 4.81 at 30 ppm H₂S, which is 1.64 times higher than that of spherical YMnO 3 sensors. Even at a low H 2 S concentration of 1 ppm, the sensor still exhibited a response value of 1.31. Furthermore, the sensor exhibited excellent selectivity and long-term stability. The enhanced performance of the hollow-structured YMnO 3 sensor is attributed to the abundant surface-active sites and diffusion channels provided by the inner and outer surfaces of the hollow nanoparticles. This facilitates the diffusion and adsorption of H 2 S gas in the sensing layer. This study achieved morphology control of hollow-structured YMnO 3 by regulating flame conditions, providing a solution for the development of sensors for efficient detection of H 2 S gas based on morphology control technology. Download: Download high-res image (205KB) Download: Download full-size image
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高影响因子
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