CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jing Yang,Wanting Li,Baoluo Zheng,Huiyu He,Xin Zhang,Pu Wang
Bismuth (Bi)-doped glasses and fibers are the most promising gain media to solve the capacity crisis in optical communication systems due to their broadband near-infrared luminescence covering O-U bands. To date, only Bi-doped fibers prepared by the modified chemical vapor deposition method have been well-developed, providing net gain performance. However, the crucial technological challenges have not been fully resolved, such as the high fabrication cost and the balance among unsaturated loss, doping concentration, and unit gain. In this work, we propose a modified sol–gel method for low temperature synthesis of highly homogeneous Bi-doped glasses. By using HF and HCl as the coordinated catalysis, a series of uniform Bi-doped glasses with low OH − content (∼4.5 ppm) was prepared at 1300 °C within 3.5 days. The Bi-doped glasses present broadband luminescence covering the O-U band, attributed to the superposition of multiple bismuth active centers (BACs), and provide relatively high fluorescence lifetimes (657–735 μs). On this basis, Bi-doped GeO 2 -SiO 2 fibers (BGSFs) were prepared via the rod-in-tube method. Utilizing a 40 m BGSF as the gain media, an amplifier was constructed using backward pumping. As the pump power of 808 nm laser diode reached 100 mW, positive gain was obtained in the range of 1200–1600 nm with a maximum on-off gain of 0.9 dB/m at 1395 nm. These results suggest that our modified sol–gel method holds promising potential for flexible fabrication of Bi-doped glasses and fibers.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2023
·Vol. 87
·期 5
·1202-1213
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IF 2.7
Liu Zhenzhong,Wu Yang,Wan Siwen,Wang Boyan,Ji Hongliang,Xiang Xiaofang
View large Download slide View large Download slide Close modal Compared with the common synthesis methods of metal-organic frameworks (MOFs), Co/Cu-based bi-MOFs composite catalyst Co X Cu (10− X ) -MOFs ( X = 2, 4, 6, and 8) was prepared by a facile synthesis method at room temperature. The bi-MOFs composite catalyst was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The removal ability of sulfamethoxazole (SMX) by different Co:Cu rate bi-MOFs composite catalysts, single Co-based MOFs (zeolitic imidazolate framework-67, ZIF-67), and Cu-based MOFs (Hong Kong University of Science and Technology-1, HKUST-1) were investigated and the effects of peracetic acid (PAA) concentration, catalyst dosage, the common interfering substances (Cl − , HCO 3 − , SO 4 2− , HA) in water, and SMX removal were investigated. Through the analysis of different free radical scavengers and the changes of surface elements before and after the reaction, the oxidation mechanism was further explored, and the stability of Co 4 Cu 6 -MOFs was explored through repeated recycling. The experimental results demonstrate that Co 4 Cu 6 -MOFs have a high catalytic activity for PAA. Co 4 Cu 6 -MOFs/PAA show the best removal effect of SMX under neutral conditions and the presence of Cl − and HCO 3 - can promote the removal of SMX. Co 4 Cu 6 -MOF composites were synthesized and used for SMX removal. Application of PAA activation catalyst to generate R–O• for SMX removal. The effects of different environmental factors on the removal of SMX were discussed.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Haozhe Qin,Bao Zhang,Chunhui Wang,Lei Ming,Xing Ou
Phase engineering for synchronously realizing the demand of electrochemical reactions and structural stability has attracted the great enthusiasm of researchers to obtain high capacity and tolerance for Na+ insertion, especially the construction of uniform heterostructures by regulating the crystal structure in the same phase. Herein, ultrathin GeS2 nanoflakes composed of a mixture of orthorhombic and monoclinic crystal structures have been constructed by employing an in situ Ge-MOF sulfidation method. Benefiting from the combined effect of the accelerated reaction kinetics derived from the self-assembly of heterostructures, and the enhanced reaction reversibility originating from the excellent homogeneity of heterointerfaces and a stable intermediate phase interface, the GS-OM electrode materials show outstanding rate properties (371.9 mA h g–1 at 30 A g–1) and Na+ uptake/removal durability (603.9 mA h g–1 at 10 A g–1 over 1000 cycles) and even deliver an excellent practicability (104.01 mA h g–1 at 1 A g–1 over 300 cycles for full cells). Of note, this constructed phase engineering is expected to provide powerful guidance and effective insight for designing better sodium ion battery anodes with not only superior electrochemical reaction reversibility but also improved structure perdurability.
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高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Bin Guan,Junyan Chen,Zhongqi Zhuang,Lei Zhu,Zeren Ma,Xuehan Hu,Chenyu Zhu,Sikai Zhao,Kaiyou Shu,Hongtao Dang,Zhen Huang
As a significant technology of CO2 utilization, artificial CO2 photoreduction has received more and more attention. Herein, g-C3N4 catalysts modified with Bi and/or Cu for CO2 photothermal reduction were prepared by solvothermal synthesis and impregnation methods. Performance evaluation and physicochemical and photo- and thermochemical characterization indicated that Bi and Cu modification effectively enhanced the photo-absorption properties of g-C3N4 catalysts, improving charge transfer efficiency and catalytic performance. Compared with single-metal modification, Bi and Cu co-modification showed a narrower bandgap and more excellent light and CO2 absorption capacity, suggesting a certain synergistic effect of Bi and Cu co-modification. The alteration of the light absorption properties may be related to the surface plasmon effect of Bi and Cu, and the co-loading of Bi and Cu can exacerbate the effect, which can effectively enhance the photoresponsivity of the catalysts, leading to higher catalytic performance.
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高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
·
2024
·Vol. 39
·期 12
·2974-2981
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IF 3.1
Wan-Feng Zhang,Qing Yang,Xiao-Ping Xia,De-Wen Zheng,Ze-Xian Cui,Yan-Qiang Zhang,Yi-Gang Xu
Sample preparation is a critical step to achieve reliable in situ chemical analysis. Sample mounting technique with a tin-based alloy was developed in recent years, which is particularly useful for high-precision volatile analyses by secondary ion mass spectrometry (SIMS). However, the success of this technique is hindered by challenges, such as complex alloy preparation and potential Pb contamination. Herein, we introduce a new Sn–Bi alloy preparation method that may overcome these hurdles and assess its potential as a standard preparation method for in situ volatile and isotope analyses. This new alloy can be manufactured with commercially available pure tin and bismuth metal (atomic Sn : Bi = 42 : 58), and its production requires only a heating plate and clean containers. This ensures its high accessibility to laboratories worldwide. The Pb content of the alloy is dependent on the tin and bismuth used. The material (Sn and Bi) from three different manufacturers were evaluated in this study, resulting in the virtually Pb-free MAC alloy (Pb <0.2 μg g−1). The SIMS U–Pb dating results of the zircon standards (Qinghu, Plešovice, and SA01) are consistent with the recommended values (within error). Furthermore, the mounted samples exhibit satisfactory relief on this alloy, suggesting that this alloy material is appropriate for the analysis of oxygen isotopes. The routine external precision of oxygen isotope ratios is better than 0.30‰ (2sd), on par with that obtained with epoxy mounts. The water background in the SIMS sample chamber can be recovered rapidly after sample transfer from the storage to the sample chamber. Hence, this tin-based alloy is suitable for sample mounting for SIMS volatile and isotope (incl. U–Pb) analyses.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 10
·6833-6843
·
IF 3.5
Hailan Qin,Jianwei Zhao,Xiaoxin Chen,Hongtian Li,Shenghao Wang,Yuxiao Du,Ahmad Azmin Mohamad,Huanfu Zhou,Dawei Wang
The investigation of lead-free ceramics with exceptional piezoelectric properties holds great importance in the substitution of lead-based materials, hence promoting the development of green technology and fostering an environmentally sustainable society. This study successfully synthesized two series of Bi(Mg 2/3 Nb 1/3 )O 3 (BMN)-modified BiFeO 3 –BaTiO 3 (BF–BT) lead-free piezoelectric ceramics using the conventional solid-state reaction approach. The phase structure, microstructure, dielectric, and piezoelectric properties of these ceramics were comprehensively investigated. A typical perovskite structure is observed in all probed compositions, and the associated phase structure undergoes a gradual transition from a rhombohedral-cubic phase mixture to a cubic-dominant phase structure as increases the content of BMN and BT. All compositions exhibit obvious core–shell microstructures with inhomogeneous element distributions. Most importantly, the BF–0.30BT–0.005BMN and BF–0.34BT–0.03BMN piezoelectric ceramics presented remarkable values for the piezoelectric coefficient (225 pC/N) and converse piezoelectric coefficient (396 pm/V), respectively. These findings highlight the potential of BMN-modified BF–BT ceramics for use in high-performance piezoelectric applications.
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高影响因子
eScience
·
2023
·
IF 0
Rong Liu,Lai Yu,Xiaoyue He,Huanhuan Liu,Xinyi Ma,Zongzhi Tao,Guanglin Wan,Nazir Ahmad,Bo Peng,Liang Shi,Genqiang Zhang
Bismuth sulfide (Bi 2 S 3 ) is a dominant anode material for sodium-ion batteries due to its high theoretical capacity. However, extreme volume fluctuations as well as low electrical conductivity and reaction kinetics still limit its practical applications. Herein, we construct an abundant heterointerface of Bi/Bi 2 S 3 by engineering the structure of Bi nanoparticles embedded on Bi 2 S 3 nanorods (denoted as Bi–Bi 2 S 3 NRs) to effectively solve the abovementioned obstacles. Theoretical and systematic characterization results reveal that the constructed heterointerface of Bi/Bi 2 S 3 has a built-in electric field, significantly boosts the electrical conductivity, enhances the Na + diffusion kinetics, and buffers the volume variation. With this modification, it can deliver long cycling life, with an ultra-high capacity of 500 mAh g −1 over 500 cycles at 1 A g −1 , and outstanding rate capability, with a capacity of 456 mAh g −1 even at 15 A g −1 . Moreover, a full cell can achieve a high energy density of 180 Wh kg −1 at a power density of 40 W kg −1 . Our research opens up a fresh path for improving the dynamics and structural stability of metal sulfide-based electrode materials for SIBs.
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Donghan Xu,Cuijuan Zhang,Yongdan Li
Derived from N-(ferrocenylmethyl)-N-(butylphthalimide)-N,N-dimethylammonium bis(trifluoromethane-sulfonyl)imide (FcPI-TFSI), ferrocene/naphthalimide (FcNI-TFSI) based ionic bipolar redox-active organic molecule is constructed via nucleophilic substitution between amines and halogenated hydrocarbons. Due to the elevated delocalized negative charge density in the radical anion, the FcNI-TFSI based nonaqueous redox flow batteries (NARFBs) exhibits substantially improved cycling stability; 764 and 233 cycles are successfully performed before 50% of the initial discharge capacity is lost at 0.01 M and 0.1 M, respectively, whereas 82 cycles for FcPI-TFSI at 0.01 M. Similar to capacity diving phenomenon in lithium-ion batteries, sudden accelerated capacity loss is observed in the high-concentration battery. The possible degradation mechanism is discussed, involving crossover issue and parasitic reactions.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Mingwu Luo,Xiongri Gan,Xinyue Zhao,Lingqi Huang,He Zhu,Xingbin Yan,Kaiyuan Shi
Aqueous Zn-ion batteries (ZIBs) are promising for large-scale energy storage due to their low cost and high safety. However, ZIBs suffer from Zn dendrite growth and side reactions over the charge-discharge processes. Herein, a facile and scalable strategy was developed based on electrophoretic deposition (EPD) of surfactant-stabilized multi-wall carbon nanotubes (MWCNT) to enhance the reversibility of Zn foil. The MWCNT coating provides high surface area and improved electronic conductivity, thus facilitating rapid charge transfer behavior over the Zn 2+ plating/stripping processes. The results indicated that cationic surfactants , cetyltrimethylammonium bromide (CTAB), are feasible to improve the stability of Zn anode as electrolyte additives in parallel to dispersion and charging of MWCNT. Single-crystalline cryptomelane-type α-MnO 2 nanowires were successfully synthesized by oxalate-reduction of potassium permanganate under ambient conditions. The ZIBs, prepared by α-MnO 2 nanowire cathode and MWCNT coated Zn anode, demonstrated surpassing rate capacity and long cycling stability. The interfacial analysis of electrodes, based on surface tension and contact angle measurements, shed some light on the design and development of multi-functional additives for advanced ZIBs.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2015
·
IF 4.169
Lulu Shangguan,Lingyi Zhang,Zhichao Xiong,Jun Ren,Runsheng Zhang,Fangyuan Gao,Weibing Zhang
The bottom-up strategy of proteomic profiling study based on mass spectrometer (MS) has drawn high attention. However, conventional solution-based digestion could not satisfy the demands of highly efficient and complete high throughput proteolysis of complex samples. We proposed a novel bi-enzymatic reactor by immobilizing two different enzymes (trypsin/chymotrypsin) onto a mixed support of hybrid organic–inorganic monolith with SBA-15 nanoparticles embedded. Typsin and chymotrypsin were crossly immobilized onto the mixed support by covalent bonding onto the monolith with glutaraldehyde as bridge reagent and chelation via copper ion onto the nanoparticles, respectively. Compared with single enzymatic reactors, the bi-enzymatic reactor improved the overall functional analysis of membrane proteins of rat liver by doubling the number of identified peptides (from 1184/1010 with trypsin/chymotrypsin enzymatic reactors to 2891 with bi-enzymatic reactor), which led to more proteins identified with deep coverage (from 452/336 to 620); the efficiency of the bi-enzymatic reactor is also better than that of solution-based tandem digestion, greatly shorting the digestion time from 24 h to 50 s. Moreover, more transmembrane proteins were identified by bi-enzymatic reactor (106) compared with solution-based tandem digestion (95) with the same two enzymes and enzymatic reactors with single enzyme immobilized (75 with trypsin and 66 with chymotrypsin). The proteolytic characteristics of the bi-enzymatic reactors were evaluated by applying them to digestion of rat liver proteins. The reactors showed good digestion capability for proteins with different hydrophobicity and molecular weight.
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产品关联
DOI
PubMed
高影响因子
CARBON
·
2025
·
IF 11.6
Tianyu Zhang,Yang Hong,Xiaolei Shi,Hongchao Zheng,Jingyang Li,Wenjing Wei,Kai Cui,Yang Li,Wei Qin,Xiaohong Wu
Developing lightweight packaging materials with high radiation protection efficiency for MOSFET radiation hardening is highly significant for enhancing the radiation resistance of MOSFETs in space radiation environments. This work presented lightweight Bi-GdF 3 /Ti 3 C 2 T x aerogel (BGTA) with high electron radiation protection efficiency (RPE) through self-assembly and directional freezing. Subsequently, a radiation hardened MOSFET was obtained by packaging with BGTA. The resulting BGTA packaging material demonstrates excellent electron protection efficiency (92.23 %) compared to conventional Al packaging materials (23.80 %) at the same areal density. Meanwhile, the BGTA-packed MOSFET shows outstanding radiation resistance, exhibiting a much smaller negative threshold voltage drift value of 0.10 V compared to the Al-packed MOSFET (1.17 V). The electron shielding mechanism of BGTA was analyzed and elucidated by FASTRAD simulation on a micro scale. Due to the synergistic effect of the honeycomb aerogel structure and Bi/GdF 3 functional filler in BGTA aerogel, the incident electrons are effectively attenuated, thereby reducing radiation damage to the SiO 2 layer of the MOSFET and improving the radiation resistance of the MOSFET. Theoretical calculation results substantiate that the BGTA-packed MOSFET exhibits lower threshold voltage shifts and trapped charges. This work presents a lightweight and highly efficient MXene aerogel packaging material for MOSFET radiation hardening.
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产品关联
DOI
高影响因子
Journal of Magnesium and Alloys
·
2023
·
IF 17.6
Junjun Wang,Ruohan Yu,Jianxiang Wang,Juncai Long,Fan Qiao,Lei Zhang,Guanjie He,Qinyou An,Liqiang Mai
Bismuth has garnered significant interest as an anode material for magnesium batteries (MBs) because of its high volumetric specific capacity and low working potential. Nonetheless, the limited cycling performance (≤100 cycles) limits the practical application of Bi as anode for MBs. Therefore, the improvement of Bi cycling performance is of great significance to the development of MBs and is also full of challenges. Here, Bi nanoparticles encapsulated in nitrogen-doped carbon with single-atom Bi embedded (Bi@NC) are prepared and reported as an anode material for MBs. Bi@NC demonstrates impressive performance, with a high discharge capacity of 347.5 mAh g −1 and good rate capability (206.4 mAh g −1 @500 mA g −1 ) in a fluoride alkyl magnesium salt electrolyte. In addition, Bi@NC exhibits exceptional long-term stability, enduring 400 cycles at 500 mA g −1 . To the best of our knowledge, among reported Bi and Bi-based compounds for MBs, Bi@NC exhibits the longest cycle life in this work. The magnesium storage mechanism of Bi@NC is deeply studied through X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. This work provides some guidance for further improving the cycling performance of other alloy anodes in MBs.
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