CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jiawen Gao,Miaoxin Zhang,Xin Zhang,Ruijun Bai,Guoqing Xin,Gongkai Wang
Sp 2 dominated carbon supported metal nanoparticles with well-controlled structures are promising for portable electrochemical energy storage device with “triple-high” (energy, power, and cycle) feature, yet remains elusive. We report here a flexible graphene fiber fabric (GFF) with well-dispersed Bi nanoparticles by a facile and efficient microwave (MW) irradiation method. By regulating the irradiation duration and π-π conjugated structure of GFF, the pristine micro-sized Bi particles can be uniformly redispersed on GFF with an average particle size of 20 nm in 5 s. The competitive mechanisms between the MW accumulated energy and surface energy of Bi nanoparticles as well as energy conversion efficiency are proposed to dominate this redispersion and particle size changing process. The entire Bi/GFF composite exhibits good conductivity, flexibility, and superior sodium ion storage specific capacity of 113 mAh g −1 at 30 A g −1 , which are conceptionally demonstrated as an anode for flexible sodium ion capacitors (SICs). The quasi-solid-state SICs exhibit great mechanical-electrochemical stability, integration property, long-term stability, and high energy/power densities. This work offers a model material of sp 2 dominated carbon supported metal nanoparticles with well-controlled structures by an efficient and facile route, demonstrating a potential for flexible, and “triple-high” energy storage device in the future.
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DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 30
·期 7
·075402
·
IF 3.404
Lulu Chen,Wenxiu Yang,Xiangjian Liu,Ling Long,Dandan Li,Jianbo Jia
The design of high-efficient and durable bi-functional oxygen electrocatalysts is still a great challenge. In this work, novel Co9S8 nanoparticles/N,S-codoped defect-rich carbon nanotubes (Co9S8/N,S-CNTs) were fabricated by an ingenious template method. CdS nanowires, as a sacrificial template, can be removed simultaneously during the carbonization process without additional post-treatments. The large BET surface area (661.2 m2 g−1) and pore volume (1.49 cm3 g−1) of Co9S8/N,S-CNTs could largely enhance the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activities by facilitating the mass transportation and exposing more active sites. The abundant defects produced by the evaporation of Cd and S doping could provide more active sites for ORR and OER. Coupling with Co9S8, Co9S8/N,S-CNTs possesses more defects in the carbon skeleton, better electron conductivity, and larger effective electrochemical area. Co9S8/N,S-CNTs not only performs excellent ORR activity with a half-wave potential of 0.821 V but also owns RuO2-like OER activity in alkaline solution. The potential difference (ΔE) between ORR and OER is as low as 0.78 V in 0.10 M KOH. The excellent bi-functional performance enables the potential to be utilized in fuel cells and metal-air batteries.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 5
·1-19
·
IF 2.8
He Jiahao,Zhang Guoxin,Xiao Yiyao,Wang Chao,Song Ningning
An effective strategy for improving microwave absorbing performance was proposed in atomically dispersed bimetallic carbon-based composite materials. The atomically dispersed ZnCo-NC@rGO composites were synthesized though metal-mediated formamide (FA) condensation and carbonization. By adjusting the Co/Zn sites loading, the electromagnetic parameters and absorption performance could be effectively optimized. With the Co/Zn ratio of around 0.01, the minimum reflection loss (RL min ) reached − 26.63 dB at absorbing thickness of 1.50 mm, and the maximum effective absorption bandwidth (EAB, RL < − 10 dB) was up to 4.52 GHz (12.78–17.30 GHz) at absorbing thickness of 1.60 mm, covering almost the Ku band. A stronger RL min of − 59.63 dB was obtained with a thickness of 4.70 mm. Different loading of atomically dispersed metal sites induces variations in metal center and ligand structure. This endows ZnCo-NC@rGO excellent impedance matching and synergistic electromagnetic loss effects. In addition, the maximum radar cross section (RCS) reduction value was up to 26.94 dB m 2 at a scattering angle of 0°. This study points out a feasible path for the fabrication of carbon-based ultralight synergistic absorbers.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Shunhang Wei,Jian Gao,Pingru Wu,Bo Yao,Haitao Xu,Yongsheng Tan,Shiyan Liu,Rong Wu,Yawei Wang,Lei Wang,Zebo Fang,Qifeng Liang
Although TiO 2 is a wide band gap semiconductor , it demonstrates photodegradation activity under visible light irradiation after dye sensitization. Compared with esterification between the surface hydroxyl group of TiO 2 and the carboxylic group of dyes, electrostatic interaction between TiO 2 and dye shows better photosensitized performance. In this work, Bi/Al co-doping anatase titania (Ti 1-x Bi 2x/3 Al 2x/3 O 2 (0 ≤ x ≤ 0.3)) is designed to enhance the electrostatic interaction. The effect of Al ions is to enhance the solubility of Bi 3+ into titania nanocrystals . A new band gap is generated after high concentration of Bi element doping , which not only promotes the absorption of visible light, but also improves the utilization of photogenerated carriers. Based on the results of transmission electron microscopy , light absorption, photodegradation activity and density functional theory calculations, it is found that bismuth dopant is the electron capture site. It first accumulates electrons through photocatalytic degradation reaction to enhance electrostatic adsorption between the catalyst and the positively charged dye molecules, and finally realizes high-efficiency photosensitization degradation of Rhodamine B. In addition, the sensitized titania has excellent photodegradation recyclability.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
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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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Shunqin Luo,Chao Tang,Zhaohui Huang,Chen Liu,Jiawei Chen,Minghao Fang
In this study, bismuth oxyiodide/titanium dioxide (BiOI/TiO 2 ) heterostructures with different molar ratios of Bi and Ti were synthesized by electrospinning and hydrothermal methods . The samples thus synthesized were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, X-ray photoelectron spectroscopy, and ultraviolet–visible diffuse reflectance spectroscopy . The results confirmed the presence of the BiOI/TiO 2 heterojunction with Bi/Ti molar ratios of 0.20–1 by electrospinning and hydrothermal methods . Photocatalytic activity was also evaluated by the degradation of methylene blue (MB) under visible-light irradiation. The 80% BiOI/TiO 2 heterostructure exhibited the best photocatalytic activity for the degradation of MB under visible-light irradiation.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 9
·4017-4029
·
IF 3.442
Wu Ke,Qin Zhaogang,Zhang Xunshuang,Guo Ruichen,Ren Xiaozhen,Pu Xipeng
Researchers have begun to pay close attention to the construction of artificial Z-scheme photocatalysts due to their excellent ability to separate photogenerated electron–hole pairs and prominent redox ability. In this study, Bi-bridged Z-scheme BiOCl/Bi 2 O 3 (BiOCl/Bi–Bi 2 O 3 ) heterojunctions with oxygen vacancies were prepared via a one-step hydrothermal method. The phase structure, morphology, and optical properties of the samples were characterized using XRD, XPS, ESR, FESEM, HRTEM, and UV–Vis DRS. Compared with BiOCl and Bi–Bi 2 O 3 , the prepared BiOCl/Bi–Bi 2 O 3 (25% and 50%) samples exhibited enhanced photocatalytic activity in degrading colorless antibiotics (tetracycline hydrochloride) and colored dyes (RhB) under visible light irradiation. This result indicated improved visible light absorption due to the presence of oxygen vacancies and enhanced separation efficiency of the photogenerated electron–hole pairs and high redox ability due to the construction of the Z-scheme. On the basis of the results of radical-trapping, photoelectron chemical experiments, and PL analysis, a possible photocatalytic mechanism of the Z-scheme BiOCl/Bi–Bi 2 O 3 heterojunctions was proposed.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2024
·
IF 3.2
Shiwen Song,Song Xiang,Qiya Liu,Min Zhang
A series of Bi/Sn co-doped aluminosilicate glasses were prepared and the optical and structural properties of the samples were investigated. The near-infrared (NIR) luminescence properties of the glass were significantly improved by the co-doping of Bi and Sn. The NIR emission peaks of samples exhibit near 1220 nm. The addition of SnO changes the glass structure and induces a decrease in the number of negative charges in the local field of Bi, which causes the Bi valence state to change from a high valence state to a low valence state. The appropriate amount of Bi 2 O 3 increases the number of Bi luminescent centers and realizes the transformation of the luminescent centers from Bi + to Bi 0 . These results suggest that regulating the doping concentration of SnO and Bi 2 O 3 is a convenient method to control the valence state of active ions and enhance the NIR luminescence properties of aluminosilicate glasses.
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高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Huanjun Su,Weili Shi,Yumeng Zhang,Ying Lin,Yani Liu
Mg3Sb2 Zintl compounds have emerged as promising thermoelectric materials due to their favorable electronic structures and low lattice thermal conductivity. However, strong carrier scattering, including ionized impurity and grain boundary scattering, suppresses mobility and limits the power factor. This study reveals that Zn doping plays a crucial role in tuning carrier scattering mechanisms in n-type Mg3(Sb,Bi)2. The substitution of Mg with Zn weakens ionized impurity scattering, facilitating charge transport and increasing carrier mobility from ∼72 to ∼135 cm2 V–1 s–1. As a result, a high power factor of ∼2089 μW m–1 K–2 is achieved at 573 K in Mg3.155Zn0.045Sb1.5Bi0.49Te0.01. Furthermore, Zn incorporation introduces localized lattice distortions and promotes the formation of high-density dislocations, which intensify phonon scattering and significantly suppress lattice thermal conductivity to ∼0.54 W m–1 K–1 at 773 K. These synergistic enhancements contribute to an optimized thermoelectric performance, yielding a peak ZT of 1.71 at 773 K and an average ZT of 1.21. The estimated conversion efficiency reaches 13% under a 470 K temperature gradient, highlighting Zn doping as an effective strategy for advancing Mg3(Sb,Bi)2-based thermoelectric materials toward high-temperature energy harvesting applications.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wenjie Yang,Qiankun Zhou,Hui Dong,Rongqiang Hu,Aoyun Kang,Lingli Liu,Xin Liang,Heng Zhang,Hongdian Lu,Chunxiang Wei,Anthony Chun Yin Yuen,Wei Yang
Bismuth is a promising anode material for sodium-ion batteries (SIBs) due to its ultrahigh theoretical volumetric capacity. However, its practical application is hindered by volume expansion during cycling, which leads to rapid capacity degradation. In this study, we reported an in-situ catalytic growth approach to synthesize Bi@GDY, a nanocomposite material comprising bismuth nanospheres encapsulated within a graphdiyne (GDY) core-shell structure. This unique architecture effectively mitigated volume expansion while enhancing the sodium storage performance, resulting in remarkable electrochemical properties, including high capacity, superior cycling stability, and reliable performance over a wide temperature range. The Bi@GDY anode demonstrated an outstanding capacity of 361.6 mAh g −1 with a retention rate of 96.9 % after 3000 cycles. In-situ and ex-situ characterizations revealed improved reaction kinetics and confirmed the characteristic alloying/dealloying mechanism. Furthermore, a Bi@GDY//NVP full cell delivered a high capacity of 183.2 mAh g −1 after 700 cycles with a retention rate of 86.9 %, underscoring its potential for practical SIB applications. These findings position Bi@GDY as a highly promising anode material for next-generation SIBs.
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产品关联
DOI
高影响因子
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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高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 21
·11445-11453
·
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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DOI
高影响因子
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