Energy & Environmental Materials
·
2020
·Vol. 4
·期 1
·126-133
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IF 0
Xiantao Meng,Xiang Deng,Liusheng Zhou,Bin Hu,Wenyi Tan,Wei Zhou,Meilin Liu,Zongping Shao
One of the critical challenges that limit broad commercialization of proton exchange membrane fuel cells (PEMFC) is to reduce the usage of Pt while maintaining high power output and sufficient durability. Herein, a novel bi-functional layer consisting of vertically aligned carbon nanotubes (VACNTs) and nanoparticles of Pt-Co catalysts (Pt-Co/VACNTs) is reported for high-performance PEMFCs. Readily prepared by a two-step process, the Pt-Co/VACNTs layer with a hydrophilic catalyst-loaded side and a hydrophobic gas diffusion side enables a PTFE-free electrode structure with fully exposed catalyst active sites and superior gas–water diffusion capability. When tested in a PEMFC, the bi-functional Pt-Co/VACNTs layer with ultralow Pt loading (~65 μg cathode cm −2 ) demonstrates a power density of 19.5 kW g Pt cathode −1 at 0.6 V, more than seven times that of a cell with commercial Pt/C catalyst (2.7 kW g Pt cathode −1 at 0.6 V) at a loading of 400 μg cathode cm −2 tested under similar conditions. This remarkable design of VACNTs-based catalyst with dual functionalities enables much lower Pt loading, faster mass transport, and higher electrochemical performance and stability. Further, the preparation procedure can be easily scaled up for low-cost fabrication and commercialization.
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Journal of Energy Storage
·
2024
·
IF 8.9
Baoyang Liu,Wang Yao,Peng Qin,Jun Qian,Xuli Ding
To cope with the charging-time and driving-range issues of the power batteries, a composite and phase modification tactics is manifested to increase the cycling stability and rate capability of the Sb 2 SnO 5 (SSO) anode for sodium-ion batteries (SIBs). The as-fabricated Bi/SSO@PCFs composite with Bi nanocrystals homogeneously dispersed on and around the SSO surface is prepared by an electrospinning method . The excellently dispersed Bi nanocrystals realize an effective contact with SSO, which effectively lowers the electron conduction barriers and promotes the sodium ion release as well as the transport upon the desodiation/sodiation process, increasing the rate capacity and cycle stability of the SSO anode. Importantly, a high-speed ion channel is constructed through the special layered Bi, and SbBi phase. The prepared Bi/SSO@PCFs anodes deliver a high rate capacity up to 25 A g −1 and long cycle life of 5000 cycles with 83 % capacity retention rate, sustaining an average capacity loss of 0.0034 % for each cycle. Particularly, the intercalation of Na + between layer-structure Bi and SbBi galleries provides a good basis for excellent cycle performance due to small volume change and unobstructed ion channels. This finding provides an effective strategy to establish ion transport highways, which essentially increase the rate-capacity and cycle-life of the SSO-based anodes for SIBs.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Jiayi Ge,Chaochao Lai,Tongtong Zhang,Meifei Chen,Xintao Zhou,Zhongqiu Luo,Zuqiang Huang,Yanjuan Zhang,Xiunan Cai
Precise engineering of interfacial electron transfer is pivotal for advancing photocatalytic performance. Herein, a metallic Bi-bridged, Bi-vacancy-rich Bi@Bi V -Bi 2 O 3 /CN S-scheme heterojunction featuring orchestrated interfacial charge transport is designed. Bi vacancies in Bi 2 O 3 acts as an efficient hole extraction agent, driving the directional migration of photogenerated holes, while the in-situ generated metallic Bi establishes a rapid electron transfer channel via Bi C interfacial bonding to concentrate electrons onto the CN substrate. Notably, the p-orbital hybridization of Bi with the p orbitals of C modulates the local electronic structure, synergistically enhancing interfacial electron dynamics. X-ray absorption spectroscopy confirms the formation of Bi C with strong electronic coupling, while density functional theory (DFT) calculations reveal directed charge migration at the Bi@Bi V -Bi 2 O 3 and CN interfaces. This dual-channel synergistic mechanism achieves highly efficient spatial separation of charge carriers while preserving highly reductive electrons and highly oxidative holes, providing an ideal platform for photocatalytic hydrogen evolution and organic pollutant degradation. Benefiting from the engineered interfacial pathways, Bi@Bi V -Bi 2 O 3 /CN achieves superior photocatalytic degradation of antibiotic, with a tetracycline (TC) degradation rate constant (0.019 min −1 ) and a hydrogen production rate (2903.30 μmol g −1 h −1 ) reaching 5.8 and 12.1 times that of pristine CN, respectively. This work provides novel insights and a theoretical foundation for designing efficient S-scheme photocatalysts with dual-functional capabilities for pollutant degradation and clean energy production.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·125519
·
IF 7.5
Xiaoshi Yi,Lijun Zhang,Yarui Song,Baochuan Qi,Zhiwei Zhao
A simple carbothermal reduction–galvanic displacement route enables confined Ag–Bi heterostructures. • Dual Ag/AgCl–Bi/BiOCl conversion delivers 171 .0 mg g −1 Cl⁻ capture. • N,S-doped carbon confinement suppresses Ag dissolution below 0.03 mg L −1 . • Solvation-corrected DFT reveals Ag-enhanced Cl⁻ adsorption and charge transfer. • Stress buffering enables 88% capacity retention during prolonged cycling. Developing high-capacity and durable chloride-storage electrodes is crucial for selective electrochemical desalination. Herein, Ag and Bi nanoparticles were confined within an N, S-doped carbon framework (Ag, Bi@NSCx) through sequential carbothermal reduction and galvanic displacement. By integrating Ag/AgCl and Bi/BiOCl dual-conversion chemistry with conductive carbon confinement, the optimized Ag, Bi@NSC1 electrode enabled an asymmetric capacitive deionization system to deliver a high Cl⁻ capture capacity of 171.0 mg g −1 and a rapid initial removal rate of 40.45 mg g −1 min −1 . The electrode retained approximately 88% of its initial capacity after 50 adsorption–desorption cycles, and the dissolved Ag concentration remained below 0.03 mg L −1 , indicating limited metal leaching during prolonged operation. It also exhibited preferential Cl⁻ capture in multianion solutions and effectively desalinated saline–alkali agricultural drainage water. Solvation-corrected density functional theory calculations revealed that Ag incorporation strengthened Cl⁻ adsorption and induced a favorable charge redistribution across the Ag–Bi interface. Multiphysics simulations further demonstrated that the NSC framework mitigated the stress localization caused by the mismatched volume changes of the Ag/AgCl and Bi/BiOCl phases. The research establishes a dual-conversion and interfacial confinement strategy for achieving selective, high-capacity, and durable chloride capture. Download: Download high-res image (470KB) Download: Download full-size image
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Qian Zeng,Peng Liu,Yihui Chen,Yingnan Li,Hongyu Xiao,Li Qingwei,Anna Li,Jingye Liang,Weiqiang Li,Yangping Wen,Kaijie Tang
A Bi-rich BiOBr/BC@AuNP nanocomposite was developed as an efficient electrochemical sensing platform. • ML − assisted central composite design enabled precise optimization of MIP conditions. • MIP electrochemical sensor for trace detection of sulfachlorpyrazine sodium in food. A highly sensitive and selective molecularly imprinted electrochemical sensor was developed for the detection of sulfachloropyrazine sodium (SPZ), assisted by machine learening (ML) optimization. The sensing platform was fabricated using novel Bi-rich BiOBr/BC@AuNPs nanocomposite, where the synergistic combination of Bi-rich BiOBr, conductive biochar, and gold nanoparticles markedly enhanced electron transfer and provided abundant electroactive sites. Critical imprinting parameters, including the functional monomer-to-template ratio, electropolymerization cycles, elution time, and incubation time, were optimized using a central composite design coupled with ML algorithms like support vector regression. Under optimal conditions, the sensor displayed a wide linear range of 0.031–61.34 ng/mL, with a low detection limit of 0.0025 ng/mL and a quantification limit of 0.0077 ng/mL. The sensor exhibited excellent selectivity, effectively distinguishing SPZ from structurally analogous sulfonamide. Successful application to spiked chicken, milk, and honey samples yielded satisfactory recoveries and reproducibility, confirming its strong potential for practical food safety.
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高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Dong Deng,Yuhan Li,Gang Liu,Xinmei Liu,Qianshi Wang,Hongfei Chen,Dongbo Wang,Mingyang Wu,Minghan Li,Fei Li,Yuewu Huang,Liancheng Zhao
BiOCl and its derivatives show considerable promise for supercapacitor applications because of their high theoretical specific capacity and rich redox activity. However, their practical performance is often limited by poor electrical conductivity and structural instability. To address these issues, we constructed a BiOCl/Bi₂₄O₃₁Cl₁₀ heterojunction to improve both charge transport and structural stability. A flake-like BiOCl precursor was first synthesized and then electrochemically treated at a constant current of 0.02 A over a wide pH range (1−13) to generate a BiOCl/Bi₂₄O₃₁Cl₁₀ heterojunction, denoted as BiOCl-1/24-X. By tuning the pH of the reaction system, pH-dependent formation of a reconstructed Bi₂₄O₃₁Cl₁₀ phase on the BiOCl surface was achieved, thereby strengthening the interfacial interaction between the two phases. This interfacial reconstruction process modulated the extent of heterointerface formation and the concentration of oxygen-vacancy-related defects, thereby promoting ion transport and charge-transfer kinetics. The results indicate that the sample treated at pH = 9 exhibits battery-type energy-storage behavior dominated by diffusion-controlled processes. Accordingly, it delivered a specific capacity of 411C·g −1 at 1·A g −1 , far exceeding that of pristine BiOCl (80C·g −1 ). Moreover, it retained 79.3% of its initial capacity after 10,000 cycles. It also achieved an energy density of 35.67 Wh·kg −1 at a power density of 923.83 W·kg −1 . In a practical demonstration, the BiOCl-1/24//AC device powered a 3.2 V LED for 900 s, highlighting its application potential. This work proposes a facile electrochemical interfacial reconstruction strategy for developing high-performance electrode materials, offering a simpler and more effective alternative to conventional chemical methods.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Jiarao Shi,Xincui Shi,Ran Pang,Su Zhang
In this work, a series of near-infrared persistent luminescent phosphors CaSnO 3 :Bi,xMg 2 + were prepared via Mg 2+ co-doping, and the effects of Mg²⁺ doping on the structure, luminescence properties, Bi valence state, and defects of the phosphors were systematically studied. The results show that at low doping concentrations, Mg²⁺ primarily enters the CaSnO 3 lattice in an interstitial manner, leading to lattice expansion. The interstitial incorporation of Mg²⁺ introduces positive charges, which promotes the reduction of Bi³ ⁺ to Bi²⁺, thereby increasing the concentration of Bi²⁺ and enhancing the near-infrared photoluminescence efficiency of the phosphors. Moreover, Mg²⁺ codoping modified the defect distribution in the phosphor, which further enhances the near-infrared persistent luminescence intensity. Under the optimal Mg 2+ doping concentration, the photoluminescence intensity of the phosphor increased by 0.8 times, and the initial persistent luminescence brightness improved by 6.3 times compared to the Bi singly-doped sample. This study not only provides a new near-infrared persistent luminescent phosphor but also offers a novel strategy for regulating the valence state of Bi ions through interstitial codoping to prepare Bi 2+ -based near-infrared persistent phosphors.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
You Xu,Hao Chen,Youwei Sheng,Taoyuan Tian,Kai Deng,Ziqiang Wang,Hongjie Yu,Liang Wang,Hongjing Wang
Electrocatalytic urea synthesis from CO2 and NO3− offers a dual solution for greenhouse gas mitigation and industrial effluent valorization, while enabling renewable energy storage. Rational design of advanced catalysts for urea electrosynthesis represents a scientifically critical yet persistently challenging endeavor. In this study, we developed Pd–Bi dilute alloy metallene arrays grown on Cu foam (Pd–Bi/CF) by a two-step galvanic replacement strategy. The optimized Pd10–Bi90/CF could deliver a notable urea yield rate of 2165.2 μg h−1 cm−2 with 45.3% faradaic efficiency at −0.25 V vs. reversible hydrogen electrode (RHE). Experimental and computational studies validated that d-p orbital hybridization between d-block Pd and p-block Bi in Pd10–Bi90/CF modulates the electronic structure of active sites, thereby facilitating adsorption and activation of NO3− and CO2, synergistic generation of key intermediates *NH2 and *CO, and selective C–N coupling toward urea synthesis. This study demonstrates a viable pathway toward optimizing Bi-based catalysts for electrocatalytic urea synthesis.
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高影响因子
CARBON
·
2026
·
IF 12.7
Shanshan Chen,Zhaoqing Lu,Li Hua,Zhijian Li,Fengfeng Jia,Rui Cheng
The rapid escalation of electromagnetic (EM) wave pollution and secondary radiation underscored the urgent need for electromagnetic interference (EMI) shielding materials with reduced reflectivity. Previous research predominantly emphasized the incorporation of magnetic fillers, often neglecting their synergistic integration with spatial architecture, thereby constraining the multifunctionality of EMI shielding systems. In contrast, layer-by-layer (LBL) fabrication technology offered precise control over microstructures and enabled multifunctional integration, which had been effectively applied in areas such as supercapacitors, controlled drug release, nanofiltration membranes and EMI shielding. By constructing tailored layered configurations, this approach facilitated tunable attenuation of electromagnetic waves. Herein, aramid nanofibers (ANF), carbon nanotubes (CNT), MXene and cobalt ferrite (CoFe 2 O 4 ) were employed to fabricate a multilayer film featuring a magnetic-electric bi-continuous gradient structure via LBL assembly. Owing to its hierarchical architecture, the (Z 1 -Z 2 -Z 3 )CoFe 2 O 4 @CNT/ANF-PMXene-CNT/ANF ((Z 1 -Z 2 -Z 3 )CoC/A-PM-C/A) films demonstrated exceptional EMI shielding performance. Particularly, the (80-40-10)CoC/A-PM-C/A composite film achieved a high EMI shielding effectiveness (EMI SE) of 63.6 dB and exhibited a low reflection coefficient (R) of 0.613, while maintaining favorable mechanical properties, including a tensile strength of 51.2 MPa and toughness of 5.67 MJ m −3 . Simultaneously, the films exhibited superior thermal camouflage capability with a mid-infrared (IR) emissivity as low as 2.61% in the 7∼17 μm range, and displayed effective Joule-heating characteristics. This work introduced a novel strategy for the development of advanced EMI shielding materials, and the resulting (Z 1 -Z 2 -Z 3 )CoC/A-PM-C/A films demonstrated considerable promise in applications involving EMI suppression, infrared stealth, and electrothermal conversion.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Yixuan Zhang,Guo-Qiang Liu,Danlei Qiao,Jiaguan Chen,Qiang Sun,Lei Wen
This work focuses on the effect of the of Mn 3+ /Mn 4+ ratio in the reactants on the structure and electrochemical properties of NaMn 0.9 Cu 0.1 O 2 cathode materials for sodium-ion batteries. By systematically varying the manganese valence states in the reactants, we observed a phase transition from the β-phase to the P2-phase with increasing Mn 3+ concentrations in the reactants, contrary to the expected favorability of the β-phase at higher Mn 3+ levels. This finding suggests a complex interplay between the valence states of the reactants and phase formation mechanisms, which needs further investigation. Additionally, electrochemical testing indicated that the phase composition significantly impacts the electrochemical performance of the material. Specifically, the M0 sample, possessing the optimal P2/β ratio, exhibited excellent electrochemical performances, achieving a high initial discharge capacity of 155.1 mA h g −1 and remains 88.1 % after 40 cycles. These results emphasize the importance of precursor selection and valence management in the development of high-performance cathode materials for sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
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Polymers
·
2026
·Vol. 18
·期 16
·1981
·
IF 5.8
Dongmei Xie,Xiaodi Mao,Hongyu Li,Xudong Chen,Yuting Li,Hongzhi Liu
To demonstrate the applicability of the “dynamic self-vulcanization of bifunctional monomers” strategy for toughening polylactic acid (PLA), hydroxylated oleic acid (HOA) was synthesized via UV-initiated thiol–ene click chemistry, using oleic acid as the starting material. In the presence of an excess molar quantity of hexamethylene diisocyanate (HDI), the dynamic self-vulcanization of bifunctional monomers was employed to design PLA blends featuring extraordinary impact toughness. During the one-pot melt compounding, in situ formation and self-crosslinking of flexible poly(urethane-co-amide) (HPUA) toughening phase, together with its reactive compatibilization with the PLA matrix, were simultaneously accomplished. The aggregation of the HPUA domains enabled the morphological transformation of the PLA blend from a sea-island structure to a partially or fully bi-continuous one. At HPUA contents of 20 wt% or higher, the blend exhibited a bi-continuous morphology with a crosslinked HPUA network, attaining a notched impact strength exceeding 110 kJ/m2and an elongation at break above 200%. In particular, when the HPUA content reached 20 wt%, the resulting PLA blend exhibited optimal impact toughness, with a notched IS of 132.1 kJ/m2(30.7 times that of neat PLA). The primary toughening mechanism was determined to be the internal cavitation of the HPUA domains, which subsequently initiates the yielding of the surrounding PLA matrix. This study proposes an applicable and facile method for fabricating polymer materials that possess excellent impact toughness.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xiuling Li,Yanan Pang,Yongle Zhang,Bo Ge,Junchang Liu,Yuling Zhang,Limin Zhao,Guina Ren,Zhaozhu Zhang
Solar interface heating evaporators are widely used and have been able to obtain clean water vapor from sewage. However, the soluble contaminants remaining in the original solution were not removed, and the floating organic pollutants affect the steam production rate. In this paper, the superhydrophobic Bi/BiOCl with low surface tension is synthesized and loaded to the felt to construct the floating layer of the photothermal device. The floating layer collaborated with the filter paper hydrophilic layer and the Pyromellitic dianhydride-Tris (4-aminophenyl) amine covalent organic framework (PMDA-TAPA COF) photothermal layer to treat the sewage containing dissolved pollutants, achieving an interfacial evaporation rate of 1.47 kg⋅m −2 ⋅h −1 . Importantly, the floating layer not only has a contact angle of 161°, which can selectively adsorb the organic solvents floating on the water surface, but also can degrade the pollutants dissolved in the water under the light and solving the problems that hinder device applications. The valence band and conduction band potentials of superhydrophobic Bi/BiOCl are at 3.065 eV and −0.435 eV, respectively, which produce h + and O 2 – under light to degrade dissolved pollutants in water. The introduction of novel superhydrophobic Bi/BiOCl photocatalyst in the floating layer provides a reference for solving the problem of pollutant residues.
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