APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Jie Tian,Zhijian Wang,Yaqin Hou,Yatao Yang,Haijun Chen,Zhanggen Huang
Inorganic Bi-based halide perovskites have attracted significant attention in the field of CO 2 photoreduction due to their excellent optoelectronic conversion performance and low toxicity. However, the inherent strong localization of electron-hole pairs remains the main factors limiting charge carrier transport and CRR performance. In this work, CBSB-x NCs with different Bi/Sb ratios were synthesized assisted by ultrasound methods to manipulate carrier behavior and assess CRR performance. The photoelectrochemical properties revealed that incorporation of Sb effectively suppressed nonradiative recombination and improved transport efficiency of charge carriers. Among the bimetallic variants, CBSB-1 NCs exhibited enhanced catalytic performance in CO production, with a yield of 38.77 μmol·g −1 and a high selectivity of 96.53 %. In-situ DRIFTS and DFT calculations indicated that Sb as co-catalytic sites promote charge transfer at the Bi-Br-Sb interface, accelerate the rapid evolution of b-CO 3 2- to HCOO - and significantly reduce the reaction energy barrier of CO.
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COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
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IF 8.3
Tianyu Zhang,Yang Hong,Jingyang Li,Yang Li,Huiyang Zhao,Kai Cui,Wenjing Wei,Hongjun Kang,Jinzhu Wu,Wei Qin,Xiaohong Wu
The radiation resistance of Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) is of great significance when applied in aerospace. However, it is still challenging to obtain MOSFETs with excellent radiation resistance. In this work, the radiation hardened MOSFETs were realized by GdF 3 -Al 2 O 3 @Bi-Ti 3 C 2 T x /epoxy (MBAG/EP) polymer-based composite coating with function of trapped interfacial electrons. The radiation resistance of resultant packed MOSFET is significantly improved, showing the lower threshold voltage negative drift value (0.41 V) than the bare MOSFET (7.89 V). This is mainly attributed to the introduction of ultra-thin Al 2 O 3 intermediate layer between Bi and GdF 3 , which effectively tailor electron dense and distribution for an effective electron attenuation, and thus improve the radiation resistance of the MOSFET. Theoretical calculations further reveal that the packed MOSFETs present the less shifted voltage and trapped charges compared with the pristine one. This work provides an interface engineering strategy for developing radiation hardened MOSFETs.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
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IF 4.175
Yunfang Huang,Hui Xu,Dan Luo,Yuezhu Zhao,Yu Fang,Qiyao Guo,Yuelin Wei,Leqing Fan,Jihuai Wu
To improve the utilization efficiency of solar energy and separation of photogenerated carries, a novel three-dimensional (3D) WO 3-x /Bi/BiOCl hierarchical heterostructures with broad spectrum responsive photocatalytic activity have been fabricated through a facile solvothermal technique. The influences of varying loading of WO 3-x on the physical performances of the as-obtained composites were systematically characterized by X-ray diffraction, scanning electron microscope, transmission electron microscopy , X-ray photoelectron spectroscopy, optical absorbance, photoluminescence and specific surface areas. The WO 3-x /Bi/BiOCl displayed a strong optical absorption from 250 to 2500 nm, and showed the superior photocatalytic performance in degradation of rhodamine B (RhB) than that of individual components. Among the as-prepared samples, the sample S24 with the appropriate content of WO 3-x displayed the best photocatalytic performance, which can photodegrade RhB with the efficiency of 100%, 100% and 96% under the UV light within 8 min, visible light within 3 min and near-infrared light within 120 min exposure, respectively. Furthermore, a plausible mechanism of the RhB degradation on WO 3-x /Bi/BiOCl photocatalysts under the near-infrared light irradiation was proposed according to the photocatalytic activity and radical species trapping experiments.
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GREEN CHEMISTRY
·
2018
·Vol. 20
·期 11
·2588-2595
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IF 8.586
Da Yang,Huan Liu,Dong-Liang Wang,Zhoujie Luo,Yong Lu,Fei Xia,Ye Liu
A bi-functional ligand (L1) containing a diphosphino fragment and sulfonic acid group (–SO3H) enabled PdCl2(MeCN)2 to efficiently catalyze the tandem bis-alkoxycarbonylation of terminal alkynes to produce aryl-/alkyl-substituted succinate (α,ω-diesters). It was found that the –SO3H incorporated in L1 indispensably assisted the Pd-catalyst in accomplishing this tandem reaction via intramolecular synergic effects. Co-catalysis over the L1-based Pd-catalyst was not due to the physical mixture of Xantphos and MeSO3H. In situ FTIR analysis verified that the formation and stability of Pd–H active species were facilitated by the presence of L1. The formation of stabilized diacylpalladium intermediate (F) was the critical driving force for the second-step methoxycarbonylation. DFT calculation was carried out to optimize the geometric structure of F, which indicated that the developed intramolecular O⋯H hydrogen bonds were an important structural feature to stabilize F. In addition, the L1-based Pd-catalyst could be recycled successfully for at least 3 runs in the ionic liquid [Bmim]NTf2 without obvious activity loss and detectable metal leaching.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2015
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IF 3.091
Meichao Gao,Dafeng Zhang,Xipeng Pu,Keying Ding,Hong Li,Tongtong Zhang,Huiyan Ma
Bi/BiOCl composite photocatalysts were synthesized by a simple combustion method. The structures, morphologies, optical, and visible-light photocatalytic properties of as-prepared Bi/BiOCl were characterized. Bi doping leads to red-shift in the absorption band and increased visible light absorption. The photocatalytic reaction tests in the degradation of the dyes of RhB showed that the loaded Bi nanoparticles could bring about a big increase in the photocatalytic activity under visible light irradiation. The main reactive oxygen species and photocatalytic mechanism of Bi/BiOCl under visible light irradiation were discussed in detail.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 21
·11445-11453
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IF 11.9
Yumeng Li,Yingmin Jin,Xin Zong,Xuebai Zhang,Guanshu Li,Yueping Xiong
Electrocatalytic carbon dioxide (CO2) reduction reactions (ECO2RRs) to form formate with high faradaic efficiency (FE) and production rate by renewable electricity are ideal to control CO2 concentration in the atmosphere. In this work, we successfully prepared bimetallic BixIny nanofiber (NF) catalysts with interconnected 3D network structure and controllable growth direction of crystal facets via electrospinning and the following electrochemical reduction for the first time, rendering a significantly increased InBi (200) lattice plane proportion in Bi5In5 NFs, which facilitated the improvement of intrinsic catalytic activity and formate selectivity for ECO2RR catalysts, as evidenced by crystalline characterization and DFT calculations. Consequently, the obtained Bi5In5 NFs achieve a maximum FE of 96.8% for formate and the corresponding production rate can reach 4.55 mmol h−1 cm−2, superior to most of the formate producing catalysts. This work provides a novel approach for preparing bimetallic catalyst NFs with high FE and product selectivity; moreover, the favorable productivity brings substantial application potential in industrial production.
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Journal of Energy Chemistry
·
2022
·
IF 13.599
Jun Yang,Jiahui Xian,Qinglin Liu,Yamei Sun,Guangqin Li
Bismuth (Bi) has indeed inspired great interests in lithium-ion batteries (LIBs) due to the high capacity, but was still limited by the low electrical conductivity and large volume variation. Herein, a composite material based on Bi nanoparticles in situ encapsulated by carbon film (Bi@CF) is prepared successfully through a facile metal–organic framework (MOF)-engaged approach. As anode materials for LIBs, the Bi@CF composites achieved high reversible capacities of 705 and 538 mAh g −1 at 0.2 and 0.5 A g −1 after 200 cycles, and long cycling performance with a stable capacity of 306 mAh g −1 at 1.0 A g −1 even after 900 cycles. In situ X-ray diffraction (XRD) measurements clearly revealed the conversion between Bi and Li 3 Bi during the alloying/dealloying process, confirming the good electrochemical reversibility of Bi@CF for Li-storage. The reaction kinetics of this Bi@CF composite was further studied by galvanostatic intermittent titration technique (GITT). This work may provide an inspiration for the elaborate design and facile preparation of alloy-type anode materials for high-performance rechargeable batteries.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2020
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IF 4.551
Yue Wei,Gang Li,Jiaxu Liu,Yanhui Yi,Hongchen Guo
The sluggish interfacial mass transfer usually hinders the achievement of high-efficiency catalytic transformation of biomass, especially for solvent-free immiscible reagent systems. Herein, amphiphilic hybrid Ti-containing catalysts in situ incorporated with organic groups (Cn-Ti-HMS) were developed for boosting biphasic solvent-free epoxidation of methyl oleate (MO) with H 2 O 2 . Benefiting from the mutual effect between organic/inorganic precursors, the resulting low-defect catalysts exhibit well-mediated surface hydrophilic/hydrophobic balance and porosity by incorporating alkyl groups. Such mediation effect exhibits two superiorities: i) accelerated adsorption of reactants by amphiphilicity; ii) boosted substrate or product diffusion by porosity property. As such, remarkably promoted catalytic properties were achieved when compared with conventional Ti-HMS. Typically, methyl-functionalized C1–Ti-HMS-50 displays the optimal catalytic performance with a 95% conversion of MO. Further mechanism study recognizes the dominant role of surface wettability and Si–OH defects content in influencing MO conversion and epoxidized MO selectivity.
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ACS Applied Materials & Interfaces
·
2021
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IF 9.229
Xiang Li,Shuhong Xu,Fan Liu,Junfeng Qu,Haibao Shao,Zhuyuan Wang,Yiping Cui,Dayan Ban,Chunlei Wang
The growing demands for optical anti-counterfeiting technology require the development of new environmentally friendly materials with single component, multimodal fluorescence and high stability. Herein, the Bi/Sb codoped Cs2Ag0.1Na0.9InCl6 lead-free double perovskite material is reported as an efficient multimodal luminescence material with excitation-wavelength-dependent emission. When excited by 360 nm UV light, dual-emission is observed at 455 and 560 nm, which comes from the 3P1–1S0 transition of Sb3+ ions and self-trapped excitons (STEs), respectively. Under the 320 nm UV lamp, the microcrystals show only a blue emission centered at 455 nm. Therefore, the Bi/Sb codoped Cs2Ag0.1Na0.9InCl6 double perovskite emits blue and yellow lights under the 320 and 360 nm UV lamp, respectively. Moreover, the obtained double perovskite shows a high PLQY up to 41% and excellent stability against both air and high temperature, which make it a promising anti-counterfeiting material.
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Journal of Energy Chemistry
·
2025
·
IF 14.9
Weihao Xia,Haonan Wang,Fengjun Ji,Tiansheng Bai,Xuan Zhou,Jinru Huang,Jingyu Lu,Yuhan Wu,Deping Li,Lijie Ci
Antimony (Sb)-based anode materials suffer from poor cycling stability in potassium-ion batteries (PIBs) due to severe volume changes during charge/discharge processes, which limit their practical application. To address this challenge, a dual strategy of alloying and carbon coating was employed, resulting in the successful synthesis of composite anodes comprising porous carbon-coated SbBi nanoalloys with tunable Sb/Bi atomic ratios. This approach significantly enhances the structural stability and electrochemical performance of Sb-based anodes. The optimized Sb 0.5 Bi 0.5 @C anode exhibits exceptional cycling stability, delivering a high reversible capacity of 316.0 mA h g −1 after 600 cycles at 0.2 C, and remarkable rate capability (230.0 mA h g −1 at 5.0 C). Moreover, it demonstrates improved thermal stability at 45°C, retaining a capacity of 328.6 mA h g −1 after 1000 cycles at 2.0 C. The potassium storage mechanism is elucidated through kinetic analysis and theoretical calculations. Furthermore, full-cell configurations were assembled and evaluated, demonstrating promising practical application potential with similarly outstanding electrochemical performance.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Jingbiao Ge,Huihui Xue,Yang Yang,Sujuan Zhang,Xiuzhen Zheng,Shifu Chen
To optimize the performance of photocatalytic H 2 production, various effective strategies have been developed to design highly efficient photocatalysts, including morphology control, synergistic reaction design, and utilization of photogenerated charge carriers (PCCs). In this study, a highly efficient Bi-Bi 2 WO 6 /Zn 0.5 Cd 0.5 S (BBWO/ZCS) composite was synthesized by embedding Zn 0.5 Cd 0.5 S (ZCS) nanospheres into Bi-Bi 2 WO 6 (BBWO) microsheets through electrostatic self-assembly method. Although BBWO show poor activity in H 2 generation, it largely improves the performance of ZCS under visible light illumination. When the mass of BBWO is 3 % in the composite, BBWO/ZCS exhibited the highest H 2 production rate (28.0 mmol g −1 h −1 ), much higher than that of pure ZCS. Meanwhile, its apparent quantum efficiency (AQE) is high to 8.45 % at 400 nm. The design of the BBWO/ZCS composite not only improves the migration and utilization efficiency of PCCs, but also offers valuable theoretical insights and experimental references for the development of highly efficient photocatalysts.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
C.X. Chen,X.Z. Zheng,W.B. Dai,C.Y. Ni,W.Y. Li,D. Wu
As energy consumption intensifies, energy saving and environmentally friendly phosphor-converted white light-emitting diodes (pc- w LEDs) have become the current research hotspots. The garnet-based CaY 2 Al 4 SiO 12 (CYAS) phosphors, with their abundant lattice sites and stable physical properties, are ideal candidates as phosphor hosts. Through comprehensive experimental and theoretical analyses, including XRD/Rietveld refinement and density functional theory (DFT) calculations, it was determined that Bi 3+ /Tb 3+ /Sm 3+ ions preferentially occupy the Y 3+ lattice site. The luminescence properties and thermal stability of CYAS: Bi 3+ /Tb 3+ /Sm 3+ have been extensively investigated. The quantum yield (QY) has been enhanced to 48.3 % due to energy transfer (ET), which is not a significant difference compared to existing phosphors, and by superposition of blue (Bi, 3 P 1 → 1 S 0 ), green (Tb, 5 D 4 → 7 F 5 ), and red (Sm, 4 G 5/2 → 6 H 5/2 ) emission, resulting in tunable spectrum and high-quality, full-spectrum white light emission. Finally, the w LED device with high color rendering index (CRI, 87), high luminous efficiency (LE, 74 lm·W −1 ), and low correlated color temperature (CCT, 4747.56 K) were fabricated by a remote ‘encapsulation’ packaging strategy, suggesting that the phosphor can be applied to high quality white light illumination.
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