Journal of Physical Chemistry C
·
2020
·
IF 4.189
Boyi Wang,Shuqi Zheng,Yuxuan Chen,Yue Wu,Juan Li,Zhen Ji,Yuning Mu,Zhibo Wei,Qian Liang,Jingxuan Liang
How to further improve the thermoelectric performance in Cu3SbSe4-based materials after optimizing its carrier concentration is a difficult issue. The present study attempts to address the issue by investigating thermoelectric performance of Cu3SbSe4 after Sn and La codoping, and all the samples were obtained by using a microwave-assisted hydrothermal synthesis method followed with the spark plasma sintering (SPS) process. First, a series of Cu3Sb1–xSnxSe4 (x = 0–0.03) compounds have been synthesized, and the hole carrier concentration obviously increased with increasing the Sn content. In addition, La doping subsequently was employed to the Cu3Sb0.98Sn0.02Se4 sample to further increase its power factor by band flattening, resulting in a typical high power factor of 1156.5 μWm–1 K–2 and zT of 0.67 in Cu3Sb0.92Sn0.02La0.06Se4 at 623 K. Our study provides a novel methodology through regulating its carrier concentration and band structure for designing high thermoelectric performance Cu3SbSe4-based materials.
研究领域:
材料科学
·
物理学
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产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2024
·
IF 5.9
Yimo Zhao,Lijiao Zheng,Yongyang Chen,Yuan Liu,Shimeng Huang,Shanping Li
In this study, a highly efficient La-Fe 2 O 3 /dielectric barrier discharge (DBD)/honeycomb ceramic plate synergistic catalytic system was successfully constructed by using modified iron oxide (Fe 2 O 3 ) catalyst coating assisted DBD plasma, and the prepared catalytic coating was fully characterized by various techniques. The results indicate that the lanthanum (La) is efficiently and uniformly doped in Fe 2 O 3 , and the modified La-Fe 2 O 3 catalyst exhibited a better photocatalytic performance. The overuse of Thiamphenicol (TAP), as a typical chloramphenicol antibiotic, has led to its accumulation in the aquatic environment. Accordingly, TAP was selected as the target contaminant to evaluate the catalytic activity of the synergistic system. The results confirmed that the catalytic ability of the synergistic catalytic system was significantly improved, and the data showed that the degradation rate of the synergistic system reached 99.1% under the same conditions compared with 68.2% for the single DBD plasma, which effectively improved low energy efficiency limitations of the single DBD technology. Through quantitative measurements of the concentrations of dissolved ozone (O 3 ) and hydrogen peroxide (H 2 O 2 ) in the system and radical trapping experiments, combined with emission spectroscopy, the mechanism of synergistic system degradation of TAP was analyzed. The intermediates in the degradation process were characterized by high-resolution mass spectrometry, and the degradation pathway of TAP was proposed based on the analysis of the intermediates and their combination with theoretical calculations. This study presents a theoretical basis for the improvement of DBD technology and a technical guide for the removal process of antibiotics from industrial wastewater.
研究领域:
环境科学
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催化化学
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抗生素降解
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DOI
PubMed
高影响因子
PHYSICA B-CONDENSED MATTER
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2022
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IF 2.988
Shiyi Zhang,Dongyan Zhang,Yangxi Yan,Maolin Zhang,Zhimin Li,Pangpang Wang,Ri-ichi Murakami
Relaxor ferroelectrics are complex materials with properties that are remarkably different from traditional ferroelectrics, and they have the ability to probe frequency-dependent dielectric susceptibility. However, the empirical laws developed for traditional ferroelectrics also apply to relaxor ferroelectrics. Here we report an abnormally improved dielectricity of the La-doped relaxor ferroelectric 0.4PNN-0.6PHT, which does not linearly vary with the piezoelectric coefficient, as it is expected. A mesoscale mechanism is proposed to explain the origin of the improved dielectric response of 0.4PNN-0.6PHT, in which the alignment of polar nano regions facilitates the polarization response to the external field. This mechanism demonstrates the critical role of polarization fluctuation for the macroscopic properties of 0.4PNN-0.6PHT.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Mengjuan Cao,Mengkai Yang,Yanyan Xu,Yaqiu Sun,Hongming Sun
It is of great value to explore non-noble and highly active electrocatalysts for oxygen evolution reaction (OER) to obtain reproducible and clean fuels. In this work, a novel La-doped FeNiSe 4 /Fe 0.8 Ni 0.2 Se 2 /NF (La-FeNi-Se/NF) heterostructure catalyst was prepared by a facile selenization treatment to La-doped FeNi Prussian blue analogue(PBA) in-situ grown on foam nickel (NF). The catalytic performance of La-FeNi-Se/NF was significantly enhanced by the doped La 3+ . As a result, the optimized La-FeNi-Se-2/NF exhibits superior alkaline OER electrocatalytic activity (overpotential 158 mV at 10 mA cm −2 and Tafel slope 35.6 mV dec −1 ) than FeNi-Se/NF and Ln-FeNi-Se/NF (Ln = Ce, Gd, Yb), and most reported FeNi-based OER electrocatalysts. The excellent electrocatalytic capability to OER is attributed to the doping FeNi-Se heterostructure with a suitable amount La 3+ . Also, the unique La-FeNi-Se-2/NF flower-like structure composed of nanograins can produce abundant active sites and enhance charge transfer, thereby further improving the catalytic performance. This work highlights an effective chemical and engineering method to prepare efficient electrochemical catalysts.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 34
·1-13
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IF 2.8
Xu Jialing,Jing Haofeng,Hou Xiong,Feng Hengheng,Yu Hongtao
For capacitor applications, Ba(Sm 1- x - y La x Bi y ) 2 Ti 4 O 12 dielectric ceramics with La/Bi co-substitution for Sm were prepared using the conventional solid-state method. Part of Sm 3+ was found to be replaced by La 3+ and Bi 3+ in ceramics that exhibit an orthorhombic tungsten bronze structure. As the concentration of Bi 3+ increased, a second phase of Bi 4 Ti 3 O 12 was observed. The co-substitutions could reduce the sintering temperature and effectively increase the dielectric constant from 80 to 140. The dielectric loss increased slightly with increasing La 3+ and Bi 3+ , but it still remained below 0.1% at 1 kHz. After sintering, a specific composition was achieved with x = 0.1 and y = 0.4. It has a high dielectric constant of 132, an ultra-low dielectric loss of approximately 0.06%, and excellent frequency stability. Additionally, it exhibits a capacitance-temperature change of ± 1% at 1 kHz over a temperature range of − 55 to 125 °C.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2017
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IF 4.784
Ying Wu,Yuelin Wei,Qiyao Guo,Hui Xu,Ling Gu,Feiyue Huang,Dan Luo,Yunfang Huang,Leqing Fan,Jihuai Wu
A series La-doped WO 3 /SrTiO 3 heterojunctions photocatalyst were successfully prepared using solvothermal method . The as-fabricated heterostructures composite included La-doped WO 3 fluff spheres tightly grew on the surface of SrTiO 3 cubic particles. The crystallanity, structural, morphological and optical features of the catalysts were characterized using several techniques including XRD , XPS , SEM, TEM UV−vis and HRTEM. The photocatalytic activity of the heterojunction was evaluated by the photocatalytic degradation of methyl orange (MO) under visible-light irradiation. The influence of La doping and SrTiO 3 molar ratio on heterojunctions photocatalysts was investigated. Among the as-prepared photocatalysts, the LWS50 sample exhibited the highest photocatalytic activity , almost 100% MO were completely decomposed within 75 min under visible light irradiation (λ > 420 nm). Compared with the pure WO 3 and SrTiO 3 , the enhancement of photocatalytic activity was mainly attributed to the three-dimensional hierarchical structure and the effectively transfer and separation of photogenerated electron–hole pairs in La doped WO 3 and SrTiO 3 heterojunctions
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Jiaming Wang,Minxin Shi,Yuanyuan Qin,Yuhua Huang,Xiancai Li,Xiaohua Cao
The enrichment and recovery of low concentration rare earth ions from wastewater resources has become an important research direction to achieve high quality utilization of rare earth resources. In this experiment, graphitic carbon nitride was used as the substrate, which was firstly compounded with Fe 3 O 4 to become magnetic graphitic carbon nitride material by alcohol heat method, and then in situ compounded with ZIF-8 in aqueous phase at room temperature to form the composite g-C 3 N 4 /Fe 3 O 4 @ZIF-8. Finally, the composite was characterized. The adsorption performance of g-C 3 N 4 /Fe 3 O 4 @ZIF-8 and the control g-C 3 N 4 /Fe 3 O 4 and ZIF-8 for La(III) under various conditions was investigated by adsorption experiment. In addition, the types and mechanism of La(III) adsorption were discussed by kinetic, isothermal adsorption line and thermodynamic modeling studies. Finally, the stability performance and reusability of the composite were evaluated by regeneration experiments. The result show that g-C 3 N 4 /Fe 3 O 4 @ZIF-8 has good adsorption performance on lanthanide ions. g-C 3 N 4 /Fe 3 O 4 @ZIF-8 reached adsorption equilibrium at about 20 min. When pH is 6 and the solid–liquid ratio of adsorbent is 0.25 g/L, the adsorption amount was 176.68 mg/g. g-C 3 N 4 /Fe 3 O 4 @ZIF-8 had good selectivity for lanthanum(III), and it retains 81 % of initial adsorption performance after five times of reuse.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2019
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IF 2.291
Luyu Wang,Yunling Wu,Junkuo Gao,Jia Song
Solid AlPO-5 and La doped AlPO-5 (La/AlPO-5) were synthesized by a hydrothermal treatment followed by crystallization and calcination . The ammonia (NH 3 ) sensing properties of AlPO-5 and La/AlPO-5 were evaluated by using quartz crystal microbalance (QCM) platform to work out the enhanced effect of La doping treatment. La/AlPO-5 possessed a higher response to NH 3 than that of AlPO-5 with same concentration. In addition to the favorable sensitivity, La/AlPO-5 based sensor also showed prominent repeatability and selectivity. We also explored the thermodynamics and humidity-enhanced effect in the NH 3 sensing process.
研究领域:
材料科学
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化学传感器
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Jiaming Wang,Huixian Zhong,Kang An,Qiang Liu,Wu Jin,Yuan Liu
In this work, Ni–Co alloy nanoparticles (NPs) on La-doped SiO2 showed excellent selectivity toward ethanol for direct ethanol synthesis via CO hydrogenation. Over the catalyst with an optimal ratio of Ni/Co, the total alcohol selectivity reached 33.5%, of which ethanol occupied 47.0 wt %. The results demonstrated that the interaction between Co and Ni improved the ability to activate H2 and CO and adjusted the amount of the dissociatively and associatively adsorbed CO. Besides, the mutual dilution of nickel and cobalt in Ni–Co alloy NPs effectively reduced the isolated Co or Ni-clusters; thus, the formation of heavy hydrocarbons was suppressed. In the reaction process, Ni@Co–Co2C, a core–shell composite with a nickel core and Co–Co2C shell, was formed, which suppressed the loss of nickel species. Moreover, with the reaction going on, a small amount of poorly alloyed Co-clusters would be covered gradually by the formed coke, resulting in an increase in alcohol selectivity.
研究领域:
催化化学
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材料科学
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能源化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
·
IF 13.6
Yuanfeng Wei,Jing Zhao,Weijian Yang,Zhiyuan Qiu,Yufen Xia,Zhimin Wang,Yuxin Li,Chengbin Liu
Arsenic contamination of groundwater harms the health of millions of people, especially As(III), which is extremely toxic and difficult to remediate. Herein, we fabricated a reliable La-Ce binary oxide-anchored carbon framework foam (La-Ce/CFF) adsorbent for As(III) deep removal. Its open 3D macroporous structure ensures fast adsorption kinetic. The incorporation of an appropriate amount of La could enhance the affinity of La-Ce/CFF for As(III). The adsorption capacity of La-Ce 10 /CFF reached 40.01 mg/g. It could purify the As(III) concentrations to drinking standard level (< 10 μg/L) over the pH ranges 3–10. It also possessed excellent anti-interference ability to the interfering ions. In addition, it worked reliably in the simulated As(III)-contaminated groundwater and river water. La-Ce 10 /CFF could easily apply in fixed-bed, and La-Ce 10 /CFF (1 g) packed column could purify 4580 BV (36.0 L) of As(III)-contaminated groundwater. When further considering the excellent reusability of La-Ce 10 /CFF, it is a promising and reliable adsorbent for As(III) deep remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Small Structures
·
2023
·Vol. 4
·期 11
·2300175
·
IF 15.9
Wenxian Li,Zulin Sun,Riyue Ge,Jiancheng Li,Yiran Li,Julie M. Cairney,Rongkun Zheng,Ying Li,Sean Li,Qian Li,Bin Liu
MoS 2 with 2D structure shows efficient hydrogen evolution reaction (HER) performance because undercoordinated Mo–S edges have ideal hydrogen adsorption free energy. MoS 2 usually does not satisfy the bifunctional catalysts because of the poor intrinsic oxygen evolution reaction (OER) catalytic activity. Herein, it is proposed to construct heterostructure with OER active components to induce efficient bifunctional catalytic activity along with heteroatom doping to modify the electronic structure to optimize the adsorption and desorption capabilities of reaction intermediates. La-doped Ni 3 S 2 /MoS 2 grown on nickel foam (La-NMS@NF) is synthesized as bifunctional catalyst taking advantage of the excellent OER performance of Ni 3 S 2 . La-NMS@NF evolves into nanoflower-like structures with the addition of La dopant, which provides abundant pore channels to facilitate mass transfer and exposure of active sites. Density functional calculations reveal that the La-doped Ni 3 S 2 /MoS 2 heterointerface can optimize the water adsorption and H * adsorption/desorption, improving the HER performance. The La-NMS@NF exhibits an overpotential of 154 and 300 mV for HER and OER at 100 mA cm −2 in 1.0 m KOH. Herein, a heteroatom-driven heterostructure activation strategy for electron rearrangement and structural evolution in electrocatalysts to decrease energy consumption in overall water splitting is demonstrated.
研究领域:
材料科学
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电化学
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Jinhui Liu,Jiasen Cui,Xing Wei,Weitao Li,Chunran Liu,Xuewen Li,Mingli Chen,Yu Fan,Jianhua Wang
It is the first time to investigate local distribution patterns of mercury (Hg) in mice organs after Hg and Se exposure with detection of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Two batch of adult mice were employed to be exposed to inorganic mercury (iHg) and methylmercury (MeHg) with or without Se at the dose of 55 μmol kg −1 . Tissue sections of brain, kidney, liver, and spleen from one batch mice were prepared to get local imaging of Hg by LA-ICP-MS. Tissues from another batch mice were used to quantify Hg and Se in tissues with ICP-MS after acid digestion . The results indicated that, for mice exposed to iHg, Hg mainly distributed in kidney, a little in liver, and hardly in brain and spleen; for mice exposed to MeHg, lower amount of Hg was found in kidney, liver and spleen, and almost no Hg was found in brain. It was interesting that for Hg and Se co-administration groups, higher level of Hg was observed in kidney, liver, spleen and even in brain than single Hg administration groups. In addition, Se level in organ tissues increased obviously not only in Se exposure group but also in MeHg exposure group, while the phenomenon was not observed in iHg exposure group. HepG2 cells were employed to investigate Se and Hg interactions in single cell level, similar bioaccumulation behavior of Hg was found between cells and mice organs. Higher level of Hg was observed in cells cultured with Se and Hg medium than cells cultured with single Hg medium. The results are expected to provide new insight to investigate Hg and Se interactions in animal bodies and in-vitro cells.
研究领域:
环境科学
·
毒理学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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