CERAMICS INTERNATIONAL
·
2018
·Vol. 44
·期 6
·6918-6925
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IF 3.057
Fan Yang,Ximiao Zhu,Jianzhang Fang,Dongdong Chen,Weihua Feng,Zhanqiang Fang
In this work, a plasmonic metallic Bi deposited BiPO 4 /BiWO 6 heterostructure with surface oxygen vacancies was synthesized through one-step solvothermal method. The successful synthesis of material was confirmed by a series of characterization techniques such as X-ray diffraction, X-ray photoelectron spectroscopy, UV–vis diffuse reflection spectroscopy, electron paramagnetic resonance, transmission electron microscope , photoluminescence spectroscopy. The characterization results showed that the surface oxygen vacancies were concentrated on the surface of BiPO 4 . The photocatalytic activity of Bi/BiPO 4 /Bi 2 WO 6 was evaluated by photocatalytic decomposition of methylene blue and 2,4-Dichlorophenol under simulated sunlight irradiation. Meanwhile, with the addition of hydrogen peroxide , the photocatalytic efficiency would be further improved. The presence of rich surface oxygen vacancies and photo-induced electron were beneficial to produce hydroxyl radicals. The enhanced photocatalytic activity of Bi/BiPO 4 /Bi 2 WO 6 heterostructure was ascribed to high separation efficiency of photo-generated electron–hole pairs, which aroused by the synergistic effects of heterojunction among different components, surface plasmonic resonance effect of Bi, and the surface oxygen vacancies.
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IONICS
·
2022
·Vol. 28
·期 11
·4977-4987
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IF 2.961
Shi Chonghua,Fu Hang,Nie Jiajin,Yao Shaowei
Bismuth-based material as a stable anode material for lithium-ion battery, which has the advantages of stable operating voltage and large volume energy density. In order to make the most of the theoretical specific capacity of 386 mAh g −1 bismuth-based materials, the carbon coating method will be used to obtain stable specific capacity. However, electrostatic spinning is great method of carbon coated precursor preparation. Here, the BiCl 3 reagent is added into the PAN-DMF spinning liquid to synthesize the fibrous Bi@C composites precursor, and the Bi@C fibre is obtained after heat treatment. Then the Bi@C fibres with different BiCl 3 content are used as anode materials for lithium-ion batteries to test the electrochemical performance of Bi@C. The results show that Bi@C fibre electrode can maintain the discharge capacity of 415.3 mAh g −1 at the current density of 100 mA g −1 for 100 cycles when the content of BiCl 3 is 1.5 g. When the current density is 500 mA g −1 , the specific capacity can still reach 415.7 mAh g −1 after 250 cycles and shows excellent electrochemical performance.
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CHEMISTRY OF MATERIALS
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2022
·
IF 10.508
Yi Wei,Chen Heng,Hang Yang,Peipei Dang,Maxim S. Molokeev,Lixin Ning,Guogang Li
Bismuth (Bi) is used for luminescent materials due to its unique optical performance, but deep-red light from Bi-doped materials is rarely reported. In particular, establishing a design principle for Bi-doped red materials is considered to be a significant challenge. Herein, using a deep-red SrSc2O4:Bi material featuring Bi–Bi pair emission, light-induced charge-transfer from BiSc3+–BiSr3+ to BiSc4+–BiSr2+ enables the realization of Bi2+2P3/2(1) → 2S1/2 deep-red emission. Intriguingly, SrSc2O4:Bi displays an excellent zero-thermal-quenching performance from 298 to 423 K, with a peak intensity that retains 98% of the intensity at 298 K and an integrated intensity at 423 K that even reaches 110% of the initial intensity. The intriguing spectroscopic characteristics of SrSc2O4:Bi make it a promising candidate in the agricultural field, night-vision security, and the medical treatment area. This work advances the understanding of red luminescence in Bi-activated luminescent materials and thus can initiate more exploitation of red materials for emerging applications.
研究领域:
材料科学
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光学材料
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固态化学
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光子学
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发光学
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Light-Science & Applications
·
2026
·Vol. 15
·期 1
·298
·
IF 24
Li Hongchao,Han Hexiang,Zhao Zhiyuan,Gong Hao,Song Xiaokun,Wang Zhongyang,Liu Gang,Fan Tongxiang,Zhou Xiao,Zhang Di
Cryogenic thermal control coatings represent a significant advancement over existing coatings limited to high reflectance in the 0.2–2.5 μm solar spectrum range, being able to reflect 96.6% of solar irradiance and to reach about 145 K equilibrium temperature, offering transformative potential for deep-space exploration, remote sensing, and other cryogenic applications. To achieve the cryogenic temperature further lower than 100 K in space, the peculiar optical property to reflect 99.9% of solar irradiance becomes necessary, which can be realized by an ultra-broadband reflectance from 0.2 to 8 μm. Here, we propose a bi-layer meta-composite comprising two distinct photonic random media, where rationally designed scatterer sizes selectively target short- and long-wavelength solar irradiance. By matching the scattering peak regimes, the meta-composite achieves a weighted solar reflectance of 97.3% over an ultrabroad 0.2–8 μm region. In the home-built deep-space simulator, the bi-layer meta-composite maintains an equilibrium temperature of 145 K, superior to existing coatings designed for room-temperature thermal control. Ground simulated irradiation tests further demonstrate exceptional optical stability under charged particles and atomic oxygen irradiations, with degradation of less than 1.5%. Moreover, the meta-composite retains optical properties comparable to existing coatings even after long-term ultraviolet irradiation. This work not only highlights the viability of photonic random meta-composites for cryogenic thermal control but also introduces a scattering regime matching strategy to broaden the spectral selectivity of disordered photonic systems.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2026
·
IF 3.1
He Shuangyi,Zhao Weiwei,Zhang Shuai,Li Tianbao,Luo Jujie
Cu − Bi bimetallic material with excellent electrochemical performance was successfully fabricated on iron foam via a one-stop microwave method. Under the optimal microwave power, heating time, and metal molar ratio, metallic Bi presents a needle-like morphology, interconnects to form a network, and is coated with Bi. This unique structure endows the Cu − Bi bimetal with the best electrochemical performance. Meanwhile, metallic Fe undergoes redox reactions in the alkaline electrolyte, which further enhances the capacitance value. The electrode prepared under the optimal synthesis conditions achieves an impressive areal capacitance value of 7.55 F cm −2 when tested at 1 A cm −2 , and it maintains 77.47% of its initially measured capacitance even after undergoing 15,000 long-term charge–discharge cycles, demonstrating excellent electrochemical stability. The assembled asymmetric supercapacitor device retains 84.1% of its original capacitance after 20,000 cycles. A power density value of 1185 μW cm −2 is realized when the energy density reaches 766.96 μWh cm −2 .
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-15
·
IF 16.6
Gao Jie,Wang Lei,Jiang Jing,Xu Qian,Zeng Nianyi,Lu Bingyun,Yuan Peibo,Sun Kai,Zhou Hongwei,He Xiaolong
Secreted proteins are one of the direct molecular mechanisms by which microbiota influence the host, thus constituting a promising field for drug discovery. Here, through bioinformatics-guided screening of the secretome of clinically established probiotics from Lactobacillus , we identify an uncharacterized secreted protein (named LPH here) that is shared by most of these probiotic strains (8/10) and demonstrate that it protects female mice from colitis in multiple models. Functional studies show that LPH is a bi-functional peptidoglycan hydrolase with both N-Acetyl-β-D-muramidase and DL-endopeptidase activities that can generate muramyl dipeptide (MDP), a NOD2 ligand. Different active site mutants of LPH in combination with Nod2 knockout female mice confirm that LPH exerts anti-colitis effects through MDP-NOD2 signaling. Furthermore, we validate that LPH can also exert protective effects on inflammation-associated colorectal cancer in female mice. Our study reports a probiotic enzyme that enhances NOD2 signaling in vivo in female mice and describes a molecular mechanism that may contribute to the effects of traditional Lactobacillus probiotics.
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ACS Nano
·
2023
·
IF 17.1
Zhengbin Tian,Wenquan Wang,Chao Dong,Xiaohui Deng,Guang-Hui Wang
Metal nanoparticles confined in porous carbon materials have been widely used in various heterogeneous catalytic processes due to their enhanced activity and stability. However, fabrication of such catalysts in a facile and scalable way remains challenging. Herein, we report a general and scalable thiol-assisted strategy to synthesize sulfur-doped mono-/bi-/trimetallic nanoparticles confined in mesoporous carbon (S-M@MC, M = Pt, Pd, Rh, Co, Zn, etc.), involving only two synthetic steps, i.e., a hydrothermal process and pyrolysis. The strategy is based on coordination chemistry and hydro-phobic interaction that the metal precursors coordinated with the hydrophobic thiol ligands are located at the hydrophobic core of micelles, in situ confined in the hydrothermally prepared mesostructured polymer, and then converted into sulfur-doped metal nanoparticles confined in MC after pyrolysis. It is demonstrated that the S-PtCo@MC exhibits enhanced catalytic activity and improved durability toward acidic hydrogen evolution reaction due to the confinement effect and S-doping.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xinhui Liu,Jing Xie,Yakun Tang,Jia Guo,Zhenjiang Lu,Baolin Liu,Hongyu Zhang,Yali Cao
Large designs are devoted to decrease the volume fluctuation and pulverization of bismuth anodes. However, further advances in cycling stability at higher current density remain challenging. Herein, we skillfully designed a unique sandwich structure composed of bismuth nanoparticles coated with carbon nanolamella (Bi@C) and carbon nanolayers (C NL) via a simple pyrolysis method. Benefiting from the synergistic effect of the unique interlayer hybrid structure, the Bi@C composite material has an interconnected electron transportation pathway, which effectively alleviates the volume expansion during alloying/dealloying and reduces the agglomeration of the Bi particles during cycling. In addition, the Bi@C embedded in the double carbon layers structure (Bi@C/C NL) not only serve as highly conductive networks for Li + , but also provide a large surface area for electrolyte penetration and storage, which will enhance the charge transfer reaction kinetics process. As a result, the Bi@C/C NL-700 anode revealed a superior capacity (427.5 mAh g −1 at 500 mA g −1 after 300 cycles), excellent long cycling stability (373 mAh g −1 at 3 A g −1 after 1500 cycles) and improved rate performance, outperforming the most reported Bi-based anode materials for lithium-ion batteries. This work will lay an experimental foundation for the rational design of high-performance anode materials in rechargeable batteries with layered hybrid structures.
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SCRIPTA MATERIALIA
·
2022
·
IF 6.302
Rui Huang,Hongye Wang,Cheng Tao,Hua Hao,Zhonghua Yao,Hanxing Liu,Minghe Cao
The development of advanced pulse power technology proposes higher demand for dielectric energy storage materials . However, simultaneously obtaining high polarization and breakdown strength has become an obstacle to the development of dielectric materials. Herein, through the elaborate design of multivariant ions Me, BiMeO 3 system thin film Bi(Ni 0.5 Zr 0.5 )O 3 integrating high polarization, large breakdown strength and a localized heterostructure , generating an excellent energy storage density of 77.42 J cm −3 and efficiency of 70.29% at 5.60 MV cm −1 . The enhancive breakdown strength of Bi(Ni 0.5 Zr 0.5 )O 3 thin film is mainly attributed to the amorphous phase induced by low preparation temperature and the oxygen vacancy bound by the valence change of Ni 2+ ion, which reduces leakage current density. This design approach is expected to be widespread for the development of BiMeO 3 system thin film.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Chan Yang,Yarong Hu,Sanxiu Li,Qun Huang,Juan Peng
Electrocatalytic reduction of CO2 into valuable fuels and chemical feedstocks in a sustainable and environmentally friendly manner is an ideal way to mitigate climate change and environmental problems. Here, we fabricated a series of self-supporting Bi–Sb bimetallic nanoleaves on carbon paper (CP) by a facile electrodeposition method. The synergistic effect of Bi and Sb components and the change of the electronic structure lead to high formate selectivity and excellent stability in the electrochemical CO2 reduction reaction (CO2RR). Specifically, the Bi–Sb/CP bimetallic electrode achieved a high Faradic efficiency (FEformate, 88.30%) at −0.9 V (vs RHE). The FE of formate remained above 80% in a broad potential range of −0.9 to −1.3 V (vs RHE), while FECO was suppressed below 6%. Density functional theory calculations showed that Bi(012)–Sb reduced the adsorption energy of the *OCHO intermediate and promoted the mass transfer of charges. The optimally adsorbed *OCHO intermediate promoted formate production while inhibiting the CO product pathway, thereby enhancing the selectivity to formate synthesis. Moreover, the CO2RR performance was also investigated in a flow-cell system to evaluate its potential for industrial applications. The bimetallic Bi–Sb catalyst can maintain a steady current density of 160 mA/cm2 at −1.2 V (vs RHE) for 25 h continuous electrolysis. Such excellent stability for formate generation in flow cells has rarely been reported in previous studies. This work offers new insights into the development of bimetallic self-supporting electrodes for CO2 reduction.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Zhige Zhang,Guican Bi,Jiawei Zhong,Jun Xie
Using green and sustainable biogas as raw material to produce syngas (H 2 /CO≈2) suitable for direct synthesis of green methanol has attracted wide attention, but developing efficient catalysts with high activity/stability remains a big challenge. A series of MgAl 2 O 4 spinel catalysts (denoted as Ni x Mg 1-x Al 2 O 4 ) is designed and applied in biogas bi-reforming. The nano Ni x Mg 1-x Al 2 O 4 catalysts were comprehensively characterized by Raman, SEM, HR-TEM, H 2 -TPR, CO 2 -TPD, etc. The CO 2 activation was verified by in situ CH 4 -TPSR/CO 2 -TPO, and the key role of Ni x Mg 1-x Al 2 O 4 in coke removal behavior mechanism was further confirmed. Due to the efficient CO 2 adsorption/activation and strong metal–support interaction, nano Ni x Mg 1-x Al 2 O 4 shows excellent catalytic stability to inhibit sintering and carbon deposition . At reforming conditions of 750 °C, a weight hourly space velocity (WHSV) of 32,400 mL g Cat −1 h −1 , the Ni 0.4 Mg 0.6 Al 2 O 4 catalyst exhibits excellent CH 4 /CO 2 conversion of 91/51 % are achieved, followed by slight decrease after 40 h, and remain basically stable for the next 40 h.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shunfa Zhou,Guoli Zheng,Feng Ji,Jiatang Wang,Zhao Liu,Jiawei shi,Jing Li,Yang Hu,Chengwei Deng,Liyuan Fan,Weiwei Cai
Excellent porosity and accessibility are key requirements during carbon-based materials design for energy conversion applications. Herein, a Ni-based porous supramolecular framework with graphite-like morphology (Ni-SOF) was rationally designed as a carbon precursor. Ultrathin carbon nanosheets dispersed with Ni nanoparticles and Ni-N x sites (Ni@NiN x -N-C) were obtained via in-situ exfoliation during pyrolysis. Due to the hetero-porous structure succeeding from Ni-SOF, the Ni@NiN x -N-C catalyst showed outstanding bifunctional oxygen electrocatalytic activity with a narrow gap of 0.69 V between potential to deliver 10 mA cm −2 oxygen evolution and half-wave potential of oxygen reduction reaction, which even surpassed the Pt/C + IrO 2 pair. Therefore, the corresponding zinc-air battery exhibited excellent power output and stability. The multiple Ni-based active sites, the unique 2D structure with a high graphitization degree and large specific surface area synergistically contributed to the excellent bifunctional electrocatalytic activity of Ni@NiN x -N-C. This work provided a novel viewpoint for the development of carbon-based electrocatalyst.
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