APPLIED ORGANOMETALLIC CHEMISTRY
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2024
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IF 3.7
Jiangyan Song,Yongyi Yu,Ziyi Zhang,Weisen Yang,Wenbin Pan,Shaoju Jian,Shaohua Jiang,Jiapeng Hu
Deposition of excessive phosphate in natural water column caused several issues, like the eutrophication and destruction of aquatic ecosystems. Adsorption has been an effective and convenient method for phosphate elimination. Herein, a novel bimetallic metal–organic framework adsorbent, namely, La-Zr-MOF, was prepared, and the morphology, crystallite, characteristic functional groups, specific surface area, and composite material surfaces were analyzed using XRD, FT-IR, SEM-EDS, and BET. The adsorption performance of the adsorbent was systematically evaluated by batch adsorption experiments, and the adsorption thermodynamic and kinetic properties were analyzed. The results reveal that La-Zr-MOF exhibits a high selectivity and sorption performance for phosphate, and the adsorption of La-Zr-MOF follows the Langmuir and pseudo–second-order models; the phosphate removal procedure is a chemisorption accompanied by an endothermic reaction, and the maximum capacity was 127.7 mg g −1 . Combined with batch adsorption experiments, kinetic and thermodynamic studies and various characterization analyses together revealed the phosphate removal mechanism, mainly ligand exchange and electrostatic interactions.
研究领域:
环境科学
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材料科学
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 35
·12037-12047
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IF 6.4
Ruifeng Wu,Haibing Li,Yafei Liu,Aimin Chang,Bo Zhang
It is found that the linearization of the resistance–temperature curve for CaCu3Ti4O12 can be achieved by changing the energy band structure induced by Fe3+, but at the cost of decreasing temperature sensitivity. Here, a novel strategy is proposed to improve the thermal and dielectric properties of CaCu3Ti4O12 ceramics by (La,Fe)-co-doping. This can both linearize the resistance–temperature relationship by adjusting the energy band structure of the grains due to the Fe3+ doping and improve the temperature sensitivity by increasing the grain boundary potential barrier resulting from La3+ doping. The dielectric constant increases upon decreasing the grain boundary potential barrier and increasing the carrier concentration. Therefore, the dielectric constant and temperature sensitivity can be regulated by adjusting the characteristics of grains and grain boundary. This work bridges the relationship between thermal sensitivity and dielectric properties, and opens up a door for the development of a multifunctional coupler CaCu3Ti4O12 device.
研究领域:
材料科学
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电子工程
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
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IF 6.364
Xiaowen Hu,Jinwu Chen,Jie Li,Huaicheng Xiang,Ying Tang,Liang Fang
Two zircon-structured ceramics AEuV 2 O 8 (A = Bi, La) were prepared with optimal sintering temperatures of 900 °C and 1375 °C, respectively. They exhibited sharp contrast performances with medium ε r ∼ 28.7 ± 0.1, Q × f ∼ 14,000 ± 300 GHz, and large positive τ f ∼ 75.7 ± 2.0 ppm/°C for BiEuV 2 O 8 , whereas low ε r ∼ 10.4 ± 0.1 Q × f ∼ 25,100 ± 300 GHz, and negative τ f ∼ − 40.7 ± 2.0 ppm/°C for LaEuV 2 O 8 . The rattling effect at the A-site was more dominant in determining microwave dielectric properties than that of compressed V 5+ at the B-site. It resulted in the higher ε r , lower Q × f and τ ε , and larger τ f of BiEuV 2 O 8 than those of LaEuV 2 O 8 . Besides, their Q × f was related with the relative density, bond valence and FWHM of the B 1 g Raman mode.
研究领域:
材料科学
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物理学
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2026
·Vol. 118
·期 3
·55
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IF 4.2
Zhang Siyu,He Ruitao,Cai Chaomin,Sun Yuxia,Li Ruiming,Yang Man,Liu Hongri
Antimony sulfide (Sb₂S₃) is a highly promising environmentally friendly semiconductor for the development of stable thin-film solar cells, owing to its high absorption coefficient, suitable bandgap ( ~ 1.7 eV), and the abundance of its constituent elements. Conventionally, CdS is employed as a buffer layer in CdS/Sb₂S₃/spiro/Au-structured solar cells. However, due to its intrinsic defects, various strategies have been implemented to enhance device performance and improve the power conversion efficiency (PCE) of Sb₂S₃ solar cells. In this study, we first fabricated a SnO₂ electron transport layer (ETL) and subsequently optimized the water bath temperature to achieve a smoother CdS layer. Furthermore, a La³⁺ ion doping process was introduced to further decrease the resistance of the CdS layer. The incorporation of an appropriate concentration of La³⁺ into the CdS layer effectively redeced its resistivity. By integrating these enhancements, we developed a La-doped CdS/SnO₂ double ETL structure. The grain size of Sb₂S₃ deposited on the 1% La-doped CdS/SnO₂ double ETL was significantly increased, leading to a substantial reduction in grain boundary density. This improvement minimized non-radiative recombination at both the grain boundaries and the CdS/Sb₂S₃ heterointerface while simultaneously enhancing charge-carrier transport across the heterojunction. Consequently, the optimized solar cell achieved an open-circuit voltage (V OC ) of 749 mV and a short-circuit current density (J s c ) of 17.01 mA/cm 2 , resulting in a power conversion efficiency (PCE) of 7.66%. This work presents an effective doping strategy to enhance the performance of the CdS buffer layer, offering valuable insights for the advancement of Sb₂S₃-based thin-film solar cells. Graphical The alternative text for this image may have been generated using AI.
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CERAMICS INTERNATIONAL
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2025
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IF 5.6
Zhi Liu,Tu Zhou,Mujia Feng,Yinuo Wang,Huajun Sun,Xiaofang Liu
Highly oriented La-doped BaTiO 3 nanorods (BT-La NRs 1 ) were fabricated using a green and facile two-step hydrothermal synthesis approach. The piezocatalytic activity of BT-0.03La NRs was evaluated under ultrasonic conditions using rhodamine B (Rh B) as the model pollutant. BT-0.03La NRs demonstrated superior piezocatalytic activity, reaching a 99.19 % degradation efficiency for 5 mg/L Rh B within 40 min, approximately twice that of pure BT. Moreover, BT-0.03La NRs also demonstrated a universal piezocatalytic degradation capability toward various dye pollutants. The dominant reactive oxygen species (ROS), specifically superoxide radicals (·O 2 − ) and hydroxyl radicals (·OH), were identified through free radical scavenging experiments. The results indicated that BT-La NRs exhibited a high aspect ratio, a large specific surface area, and greater deformability under external mechanical force. Furthermore, 3 % La doping introduced oxygen vacancies (OVs), resulting in lattice distortion and improved piezocatalytic performance. This study is the first to employ a strategy combining morphology-control and ion-doping engineering to modify BT, thereby significantly enhancing its piezoelectric properties. This could provide a novel strategy for the future application of catalyst modification in wastewater remediation.
研究领域:
材料科学
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环境催化
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纳米材料
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压电材料
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废水处理
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COMPOSITES PART B-ENGINEERING
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2025
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IF 14.2
Yue Lian,Xilin Wang,Hong Chen,Yong Hu,Mengqi Liang,Qiaoyu Huang,Zhaoxia Chen,Yong Liu,Yuhong Zhang
With the rapid development of industrial activities, oil spills have occurred frequently at sea, causing increasingly severe ecological damage and environmental pollution. However, traditional superhydrophobic sponges can only adsorb low-viscosity oils and are ineffective for high-viscosity crude oils with poor fluidity. Therefore, there is an urgent need to develop novel materials capable of effectively addressing crude oil spills. In this paper, LA-MOF was prepared by modifying zirconium-based metal-organic framework (UiO-66-NH 2 ) with lauric acid (LA), and a photothermal superhydrophobic sponge (LA-MOF@PDA@MS) was fabricated by sequentially depositing polydopamine (PDA) and LA-MOF onto melamine sponges (MS). The resulting LA-MOF@PDA@MS exhibits excellent water repellency, with a water contact angle (WCA) of 155.5°, along with good self-cleaning properties, chemical stability, and mechanical durability. The modified sponge demonstrates an oil absorption capacity ranging from 28.60 to 56.83 g/g, with separation efficiencies exceeding 97 % for the select oils. Moreover, the LA-MOF@PDA@MS exhibits remarkable photothermal performance, capable of elevating its temperature to 68.3 °C within 300 s under simulated sunlight irradiation. The heating capability significantly reduces the viscosity of crude oil, enabling efficient absorption. The sponge achieves a saturated crude oil uptake of 60.7 g/g with a transfer rate of 5.49 g/min. Furthermore, the modified sponge displays excellent anti-icing and antimicrobial properties, further extending its service life in practical applications. These superior characteristics make the LA-MOF@PDA@MS sponge a highly promising candidate for oil spill remediation.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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海洋污染治理
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INORGANIC CHEMISTRY
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2026
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IF 4.7
Yarong Chai,Bo Gao,Song Xu,Qun Xu
Electrocatalytic conversion of nitrate to ammonia is a rapidly evolving field due to its potential applications toward nitrate pollution remediation and sustainable ammonia synthesis. As a group of well-established electrocatalysts, the activity of Cu-based materials is highly related to the coordination environment. Herein, a novel Cu–La-based dual-atom catalyst (Cu–La/DAC) was prepared using a Robson-type bimetallic Cu–La complex as precursor, where the square-planar Cu center of Cu–La/DAC effectively deviates due to the presence of adjacent La atom. As a result, the HOMO (dxy) energy of Cu is effectively reduced, which facilitates the formation of low-valent Cu and subsequent electrocatalysis. Compared to Cu2/DAC analogue containing square-planar Cu, Cu–La/DAC exhibits significantly enhanced activity toward electrocatalytic nitrate (NO3–) reduction to ammonia (NH3) (yield: 14.02 mg h–1 cm–2; Faraday efficiency: 88.42%), which is theoretically attributed to the reduced energy barrier of NO3– adsorption and *NO3 deoxygenation induced upon the coordination environment modulation of Cu.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2012
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IF 2.289
Lei Lei,Daqin Chen,Feng Huang,Yunlong Yu,Yuansheng Wang
Single phase cubic BaLnF 5 (Ln = La–Lu, Y) nanocrystals are successfully synthesized via a common facile solvothermal route using oleic acid as surfactant. It is found that the smaller the Ln 3+ radius, the easier to precipitate the undesired BaLn 2 F 8 phase in the reaction system along with the formation of BaLnF 5 . In this case, the appropriate reaction temperature is required to obtain single BaLnF 5 nanophase. Measurements on the up-conversion emission behaviors of the Yb 3+ /Er 3+ (Tm 3+ ): BaLaF 5 and Yb 3+ /Er 3+ (Tm 3+ ): BaLuF 5 nanocrystals demonstrate that BaLnF 5 are desirable up-conversion hosts. In addition, the Ce 3+ /Ln 3+ (Ln = Tb, Eu, Dy, Sm): BaGdF 5 nanocrystals are found exhibiting multicolor down-conversion emissions.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Yixi Xu,Yufei Huang,Jia Zhao,Xuhui Han,Chunpeng Chai,Huiling Ma
Two-dimensional nanomaterial MXene Ti 3 C 2 T x with excellent electrical conductivity has received extensive attention in the electromagnetic wave (EMW) absorption field. However, the excessively high permittivity of Ti 3 C 2 T x is not conducive to impedance matching and the absorption of EMW. Considering the low permittivity and mesoporous structure of MOF , in this work, Co/La-MOF were in situ growth on the surfaces of Ti 3 C 2 T x by a facile co-solvothermal method. The obtained Co/La-MOF anchored on Ti 3 C 2 T x (Co/La-MOF/Ti 3 C 2 T x ) composite exhibits low density with excellent EMW absorption performance. Co/La-MOF/Ti 3 C 2 T x -2 (Co 2+ /La 3+ mass ratio of 16:3) shows the minimum reflection loss of − 44.15 dB at 4.00 GHz with the effective absorption bandwidth of 3.67 GHz in the frequency range of 14.03–17.70 GHz under 1.3 mm. In addition, the electromagnetic absorption mechanism of Co/La-MOF/Ti 3 C 2 T x was also investigated. It provides an effective strategy for the preparation of a novel absorber with high EMW absorbing performance.
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SENSORS AND ACTUATORS B-CHEMICAL
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2022
·
IF 9.221
Ziyu Ma,Bing Yang,Yue Song,Yang Song,Jianbo Sun
ZIF-67 and its derived materials have large specific surface areas, high porosity, and high stability; therefore, they are widely used in sensors and other detection methods. However, their electrical conductivity is seriously affected due to their organic framework during the sensing process, limiting their practical applications. In this study, La-ZIF materials are successfully synthesized by a simple water bath method and heat treatment using La-doped Co-MOF as a precursor. The material which has lamella-lapped thin shell structure and resistance reduced by an order of magnitude was successfully synthesized. The systematic gas sensitivity test shows the material's promising response to H 2 S gas with high gas selectivity. The response value of La-ZIF5 to 50 ppm H 2 S is increased by one order of magnitude. The gas-sensitive and conductive mechanisms are analyzed with XPS and UPS results.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Mingyuan Zhao,Jing Wang,Hao Yuan,Zehan Zheng,Lei Zhao
AgNbO3-based Pb-free antiferroelectric (AFE) ceramics have attracted increasing interest owing to their excellent potential in energy storage applications. Herein, a high recoverable energy storage density (Wrec) of 7.62 J/cm3 is realized in La-doped AgNbO3 ceramics prepared via tape casting. The high Wrec is attributed to high breakdown strength Eb of 380 kV/cm induced by dense microstructure as well as fine grain size and enhanced AFE stability stemming from M2 phase and reduced tolerance factor t. The high Wrec exceeding 6 J/cm3 was maintained in a wide temperature range of 20–150 °C and exhibited frequency stability with less than 8% variation in a range of 1–200 Hz. The discharge energy density Wd exhibited temperature stability at 30–110 °C with less than 9% variation. Our research provides a good method for producing AgNbO3-based ceramics having high energy storage performances.
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PubMed
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Hui Liang,Jing Li,Xinhui Shen,Benliang Cao,Junxiang Zhu,Baozhang Geng,Sihang Zhu,Wenjiang Li
Amorphous catalysts have a large number of catalytic active sites. Here, we report a magnesium composite trace lanthanum catalyst (La@Mg), in which La and Mg layers form amorphous Mg–La compound on the surface of layered Mg. The test shows this La@Mg has hydrogen storage capacity of about 7.6 wt% and hydrogen desorption of 7.2 wt%, higher than that of crystalline La@Mg and sole Mg, rapid absorption/desorption kinetic and stable reversible absorption/desorption cycles. La@Mg exhibits an optimistic hydrogen storage performance than Mg-based materials previously reported in the literature. Combined with theoretical calculations, it is shown that the amorphous Mg–La has an catalysis on hydrogen storage performance of La@Mg system, which contributing to the dispersion of Mg and providing channels for hydrogen diffusion, facilitating hydrogenation by accelerating H atoms diffuse between the subsurface and the surface. This work provides experiment and mechanism guidance for the development of efficient hydrogen storage materials.
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