Journal of Environmental Sciences
·
2025
·
IF 6.3
Lingyun Xu,Shanshan Lu,Liping Jiang,Xiaohe Tian,Xijie Lin,Jianhua Qiu
Metal-organic framework membranes have been proven to possess outstanding iodine adsorption capacity, but many MOFs are highly sensitive to water, limiting their use in aqueous solution. Herein, polypyrrole (PPy) molecules are deposited onto Zn-based metal-organic framework (Zn-MOF) membranes to enhance water stability and the adsorption performance for iodine ions in aqueous solution. The hydrophobic nature of PPy molecules and the nitrogen atoms in the pyrrole ring, which have lone electron pairs, allow for the doping of iodine to form a charge-transfer complex. This effectively slows down the hydrolysis of the Zn-MOF and improves the iodine scavenging ability. For the iodine aqueous solution (I 2 /KI), the saturated capacity of iodine adsorption of the Zn-MOF@PPy membrane reaches up to 397 mg/g, compared to that of the Zn-MOF membrane (183 mg/g). Under dynamic adsorption processes, the Zn-MOF@PPy membrane achieved a removal efficiency of 93.89 % within 6 min. Molecular simulations reveal that Zn-MOF exhibits a water molecule binding energy of -4.6 kcal/mol, while Zn-MOF@PPy shows a weaker binding energy of -1.3 kcal/mol. Based on the Monte Carlo simulations, the atomic distance between I 3 - and Zn-MOF@PPy is 2.8 Å, representing a reduction compared to that of Zn-MOF (4.3 Å). The Zn-MOF and Zn-MOF@PPy have binding energies of -3.4 kcal/mol and -4.6 kcal/mol with I 3 - , respectively. Those results confirm that the hydrophobic PPy layer effectively repels water molecules, creating a low-dielectric environment that substantially mitigates direct water attack on the Zn-MOF framework. The presence of strong interaction sites in the PPy modified layer, which tightly anchors the iodine species on the framework surface. This attempt provides new insights into improving the MOF adsorption membranes’ capture performance and water stability for iodine in aqueous solution.
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DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 9
·2149
·
IF 3.2
Qingmeng Wang,Xiuli Wang,Xiaomin Cheng,Qianju Cheng,Yi Yang
In the fields of nuclear engineering and solar thermal utilization, low melting point alloys with excellent thermal conductivity and heat transfer performance have attracted extensive research as a new generation of heat transfer fluids, leading to many fundamental and important application issues. This study investigates the high-temperature corrosion behavior of Sn-50Bi-2Zn (wt.%) heat transfer alloy against 304 stainless steel (304), 310S heat-resistant steel (310S), and 20 carbon steel (20C) at 600 °C. Theoretical analysis, based on Fick’s diffusion law, and experimental measurements reveal significant differences in corrosion severity. After 473 h, 20 carbon steel exhibited the lowest corrosion layer thickness (0.07 mm), while 310S suffered the most severe corrosion (1.50 mm), exceeding 304SS (0.83 mm) by 81%. Diffusion coefficients derived from Sn penetration depths further quantified these trends: D310S = 2.51 × 10−7mm2/s (6.8 × higher than 304: 3.7 × 10−8mm2/s) and D20C = 2.87 × 10−10mm2/s (128 × lower than 304SS). XRF analysis confirmed the dissolution of steel components into the molten alloy, with Fe, Cr, and Ni content increasing to 0.382 wt.%, 0.417 wt.%, and 0.694 wt.%, respectively, after 480 h. These results underscore the critical role of Ni content in accelerating Sn/Zn diffusion and pore formation, providing actionable insights for material selection in high-temperature heat transfer systems.
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DOI
PubMed
高影响因子
Microstructures
·
2025
·Vol. 5
·期 2
·N
·
IF 9
Canglong Li,Hongli Qi,Jie Huang,Dongping Chen,Yuanzi Cheng,Minghan Xu,Zihao Jiang,Huaming Yu,Yang Huang,Guanghui Li,Yuejiao Chen
The cyclability and reversibility of aqueous zinc-ion batteries (AZIBs) are severely hampered by the safety concerns arising from the Zn dendrite growth. Therefore, a stable anode with inhibited dendrites and side reactions is crucial for AZIBs. Herein, we utilized methyl acetoacetate (MA) as an additive to prevent dendrite growth and enable highly reversible Zn anodes. Benefiting from the nucleophilic groups (carbonyl groups) in MA, MA molecules can preferentially adsorb on the anode/electrolyte interface (AEI), forming a molecular protective layer. Such MA layers can not only regulate the migration and deposition of zinc ions, but also inhibit side reactions induced by the decomposition of free H2O molecules at AEI. Therefore, the symmetric cell with the addition of MA achieves a long-term cycling stability of 1,500 h at 2 mA cm-2 with a capacity of 2 mAh cm-2. In addition, the Zn//NVO full cell using MA-contained electrolyte demonstrates a high specific capacity (138.4 mAh g-1) with an outstanding capacity retention (92.8% after 600 cycles) at 1 A g-1. This work provides a principle for the use of ester-based additives with nucleophilic groups to suppress Zn dendrite growth for highly durable zinc metal anodes.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Pang Renze,Dong Xueyu,Wu Shaowei,Cheng Xinhua
High-performance 3D-Zn@Zn 3 (PO 4 ) 2 anode was constructed by a simple two-step strategy with 3D-Zn electrode prepared via electrodeposition followed by Zn 3 (PO 4 ) 2 protective layer decorated on its surface via chemical reaction exhibiting good universality. 3D-Zn@Zn 3 (PO 4 ) 2 anode demonstrated high hydrogen evolution overpotential and transference number of Zn 2+ besides low desolvation energy barrier and rapid transfer kinetics of Zn 2+ . Its symmetric cell could understand more than 1200 h at 1 mA cm −2 for 1 mA h cm −2 . When the anode was assembled into zinc-ion battery with MnO 2 cathode, it delivered specific capacity of 229.43 mA h g −1 at 0.1 A g −1 as well as exhibited remarkable rate capability and long-term cycling stability with capacity retention of 65.0% and Coulombic efficiency of 99.6% after 400 cycles under 1 A g −1 . The synergistic effect was studied between Zn 2+ -conductive hopeite layer and 3D-Zn electrode with (002) crystal plane orientation as well as three-dimensional (3D) microstructure as a template.
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高影响因子
Science Bulletin
·
2020
·
IF 9.511
Linbao Guo,Jiangjian Shi,Qing Yu,Biwen Duan,Xiao Xu,Jiazheng Zhou,Jionghua Wu,Yusheng Li,Dongmei Li,Huijue Wu,Yanhong Luo,Qingbo Meng
Aqueous precursors provide an alluring approach for low-cost and environmentally friendly production of earth-abundant Cu 2 ZnSn(S, Se) 4 (CZTSSe) solar cells. The key is to find an appropriate molecular agent to prepare a stable solution and optimize the coordination structure to facilitate the subsequent crystallization process . Herein, we introduce thioglycolic acid (TGA), which possesses strong coordination (SH) and hydrophilic (COOH) groups, as the agent and use deprotonation to regulate the coordination competition within the aqueous solution. Ultimately, metal cations are adequately coordinated with thiolate anions , and carboxylate anions are released to become hydrated to form an ultrastable aqueous solution. These factors have contributed to achieving CZTSSe solar cells with an efficiency as high as 12.3% (a certified efficiency of 12.0%) and providing an extremely wide time window for precursor storage and usage. This work represents significant progress in the non-toxic solution fabrication of CZTSSe solar cells and holds great potential for the development of CZTSSe and other metal sulfide solar cells.
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Qiang Zhang,Yi Zhang,Liangjie Fu,Sainan Liu,Huaming Yang
The preparation of cathode materials for aqueous Zn-ion batteries (ZIBs) with excellent electrochemical properties is an attractive research focus. However, the large size and high polarization of hydrated zinc ions limit the diffusion kinetics of Zn 2+ /electron, and the side reactions in the system also affect the performance of the battery. Herein, we present a novel hydrophilic self-supporting composite cathode for aqueous ZIBs, which employs V 10 O 24 ·12H 2 O as active materials, acid-treated natural sepiolite and carbon nanotubes as structural and interfacial modifiers. It is demonstrated that the devices exhibit a high specific capacity of 191 mAh g −1 at a current density of 500 mA g −1 (93.6% retention after 100 cycles) and excellent rate performance. This good electrochemical performance is mainly related to the formation of hydrophilic surface/interface, the design of self-supporting and the good conductivity of the composite electrode. Specifically, the addition of acid-treated natural sepiolite and carbon nanotubes could improve the mechanical properties, hydrophilicity and the conductivity of electrode materials, respectively, making this strategy a promising choice for ZIBs.
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高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 28
·3833-3843
·
IF 2.6
Shuting Cui,Yuchao Du,Guoping Li,Qiyong Chen,Ning Tang,Weikun Ge,Lili Xi,Bo Shen,Lijuan Zhao
Gallium oxide (β-Ga2O3) is a well-known extra-wide bandgap semiconductor and one of the promising materials used for power photoelectric devices, gas sensors, catalytic agents, etc. This work presents the suppression of self-trapped holes (STHs) and increase of oxygen vacancies (VO) in β-Ga2O3 microspindles by doping of Zn ions as well as the electrocatalytic activity of these microspindles. Undoped and Zn-doped β-Ga2O3 microspindles were prepared by a hydrothermal method followed by high-temperature calcination. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) results show that the morphology and structure of the samples did not change after low dose of Zn doping. The analyses of temperature-dependent photoluminescence (PL) spectra and X-ray photoelectron spectroscopy (XPS) indicate that incorporation of divalent Zn ions as deep acceptors can increase VO concentration and effectively suppress the formation of STHs. Enhanced electrocatalytic activity was observed in Zn-doped β-Ga2O3 microspindles compared with undoped β-Ga2O3 microspindles. The new active sites introduced by Zn doping, higher VO concentration, and suppressed STHs are believed to be responsible for the enhanced electrocatalytic performance of Zn-doped β-Ga2O3 microspindles. This work is expected to expand the application of β-Ga2O3 based microstructures in electrocatalysis and provide innovative ideas for energy and environmental issues.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yi Wu,Junliang Chen,Jie Liu,Linjie Zhang,Reza Abazari,Ting-Ting Li,Jinjie Qian
The energy crisis heightens interest in proton exchange membrane fuel cells (PEMFCs), where the oxygen reduction reaction (ORR) is a critical cathodic process hindered by its intrinsic sluggish kinetics. Single-atom catalysts (SACs) at the molecular level, notably those featuring an Fe-N 4 structure derived from iron phthalocyanine (FePc), exhibit significant potential but confront the challenges of aggregation and inadequate electrical conductivity. Herein, we present a novel FePc coupled with defect-rich CoN x -doped hollow carbon nanostraw derived from cobalt-doped indium-based metal–organic frameworks (MOFs). This enhancement is attributed to the CoN x structure’s effective modulation of the Fe-N 4 active sites, further complemented by the hollow nanostraw structure, which significantly increases the accessibility of active sites, thereby promoting enhanced catalytic performance. FePc@HCoNC demonstrates exceptional ORR performance with an oxygen reduction potential of 0.903 V, half-wave potential of 0.914 V, and limiting current density of 5.18 mA cm −2 . For zinc-air batteries (ZABs), FePc@HCoNC achieves an open-circuit voltage of 1.524 V, peak power density of 153.06 mW cm −2 , specific capacity of 758.10 mAh g −1 , and stable cycling for 150 h. These findings underscore its potential as a superior alternative to precious metal-based catalysts, offering a pathway to more sustainable and efficient energy conversion technologies.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Penghai Wei,Yali Zhang,Yaoguo Huang,Yun Jia,Linlin Chen,Ming Wang
Cyanide wastewater contains highly toxic substances such as cyanide and metals. A simple and efficient photoelectro-catalytic oxidation method was proposed. Effect and mechanism of cyanide degradation and Cu/Zn recovery by photoelectro-catalytic oxidation were investigated. The experimental results show the degradation efficiency of total cyanide and removal efficiencies of copper and zinc reached 96.90%, 99.76% and 90.56%, respectively, under the optimum conditions of 2.5 V external bias voltage and 4.0 h with air and lighting. An external electric field can significantly improve the migration and separation of photo-generated electrons ( e – ) and holes ( h + ), thereby increasing the photocatalytic efficiency. Simultaneously, the surface potential of semiconductor is lower than the body under the action of bias voltage and leads to energy band bending. XPS analysis indicates that cyanide is finally degraded into carbon oxide and nitrogen. Cu and Zn are mainly recovered as elementary substance.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Chunpeng Li,Jun Zhang,Kai Zhang,Anping Zhang,Wei Jian,Ping Jiang,Zhong-Shuai Wu,Dianbo Ruan
Aqueous Na–Zn ion batteries are promising for large-scale energy storage due to their low cost and high output voltage potential. However, the formed dendrites and notorious side reactions of zinc anodes lead to rapid performance degradation. Here, a sodium–zinc dication hybrid hydrated deep eutectic electrolyte system (NZDES) is proposed, in which organic ligands and all water molecules participate in NZDES’s internal solvation structure networks, resulting in the suppressed side reaction at the Zn anode. Furthermore, the unique aqueous Zn2+ solvation shell is efficiently regulated by Na+, enabling high Zn deposition/stripping reversibility (96.5% Coulombic efficiency). Meanwhile, the decomposition of solvated methylsulfonylmethane (MSM) forms the enhanced solid electrolyte interphase, which improves the smoothness of the Zn anode and further suppresses the decomposition of water. With these merits, the CuHCF/Zn hybrid batteries with dication deep eutectic electrolytes exhibit a high capacity retention of >91.6% after 3000 cycles at 10 C with a 1.9 V open circuit voltage. The results provide a potential design strategy for an effective solid electrolyte interface for aqueous zinc ion batteries.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jinwen Hu,Xiangbin Cai,Jiao Wu,Cuncun Xin,Jingya Guo,Ziruo Liu,Jiazhen Wei,Xusheng Cheng,Ce Hao,Haopeng Dong,Guifeng Zhang,Ning Wang,Yongpeng Lei,Wei Liu,Yantao Shi
Endowing the transition-metal-nitrogen-carbon (M-N-Cs) electrocatalysts with high oxygen reduction activity for sustainable energy conversion, is a field of intense research while remains elusive. Here we exploit the variable configuration of atomically dispersed Cu 1 centers on carbon support via rationally constructing prototypical CuN 2+2 active sites to boost the kinetically sluggish electrochemical oxygen reduction. Density functional theory reveals the modified electronic structure of active Cu site and its derived orbital overlap through right symmetry with the degenerate π* orbital of O 2 molecule, which more effectively facilitates O 2 activation compared with CuN 4 counterpart. The targeted electrocatalyst delivers superior alkaline ORR activity with a half-wave potential of 0.88 V and superior kinetics with Tafel slope of 48 mV dec −1 , outperforming those of benchmark Pt/C. Remarkably, further demonstrated excellent peak power density and long-term durability in both primary liquid and flexible solid-state Zn-air battery assemblies signify the potential for practical applications.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 50
·期 12
·7240-7249
·
IF 1.938
Tang Jing,Chen Mingming,Xu Hui
Zn ion-doped amorphous NiWO 4 nanospheres (named ZNWO) were successfully synthesized using a simple chemical coprecipitation method. The specific surface area and pore size of NiWO 4 were significantly improved owing to the Zn atom dopant. Compared with NiWO 4 , the conductivity of ZNWO increases and, more importantly, the energy gap decreases. This is mainly because Zn atoms are used as dopants to generate energy levels in the forbidden band of NiWO 4 , which decreases the energy absorption of electronic transitions. When tested under a traditional three-electrode system, the obtained Zn-doped NiWO 4 with 10 at.% Zn (labeled ZNWO-10) delivered an impressive specific capacitance of 653.75 F g -1 at a current density of 1 A g −1 , with a capacitance retention of 64.1% at 1 A g -1 over 1000 cycles. However, pristine NiWO 4 displayed an inferior capacitance retention of 6.4% under the same conditions. Studying confirms the availability of electronic structure control in NiWO 4 by introducing Zn atoms for pseudocapacitance (PC). When it is combined with an activated carbon (AC) electrode, the ZNWO//AC device exhibits a maximum energy density of 34.4 W h kg -1 at a power density of 525 W kg -1 and excellent cycling stability, with 116.3% retention after 1000 cycles. This study provides new options and an important foundation for application in asymmetric supercapacitors.
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高影响因子
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