JOURNAL OF MOLECULAR STRUCTURE
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2025
·
IF 4.7
Feng Li,Ying Huang,Tong-Wei Zhang,Wei Lu,Chuan-Ze Zhong,Lian-Sheng Cui,Peng-Fei Yao
A Zn-based metal-organic framework (Zn-MOF) with a two-dimensional structure was successfully constructed via a solvothermal method. X-ray single-crystal diffraction analysis shows that Zn-MOF crystallizes in the monoclinic system with the P 2₁/ c space group. The Zn²⁺ ions exhibit a four-coordinated tetrahedral configuration, forming a uninodal 4-connected tetragonal two-dimensional framework with the point symbol {4 ⁴ ·6 ² }. First-principles calculations reveal that Zn-MOF is an indirect band-gap compound with a band gap of 2.64 eV, which is mainly determined by the bpydb²⁻ anionic units. Thermogravimetric (TG) analysis indicates that Zn-MOF undergoes major weight loss in the range of 395–490°C. Therefore, ZnO with different concentrations of oxygen vacancies (OVs-ZnO) was prepared by mixing Zn-MOF with different masses of glucose and calcining the mixture at 500°C. X-ray diffraction (XRD) and transmission electron microscopy (TEM) results confirm that the main component of the calcined samples is ZnO. Electron paramagnetic resonance (EPR) analysis shows the presence of oxygen vacancies (OVs) on the surface of the prepared ZnO samples. Ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) analysis indicates that the band gap widths (E g ) of Zn-MOF and OVs-ZnO are 2.68 eV, 2.55 eV, 2.29 eV, 2.07 eV and 1.76 eV, respectively. Electrochemical impedance spectroscopy (EIS) and photocurrent (PCR) measurements demonstrate that OVs-ZnO (after calcination) is more favorable for the separation of photogenerated electron-hole pairs than Zn-MOF. Photocatalytic degradation experiments show that within 60 min, the photocatalytic degradation rate of TC by OVs-ZnO is significantly higher than that by Zn-MOF; in particular, the degradation rate of TC by OVs-ZnO-4 can reach over 90%. Radical trapping experiments reveal that h⁺, ·OH and ·O₂⁻ are all involved in the photocatalytic degradation process of TC, with ·OH being the key reactive species.
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高影响因子
FUEL
·
2025
·
IF 7.5
Shaorui Jia,Junhong Ma,Xinbo Zhang,Chaoyun Ma,Xue Yu,Zhaohui Chen,Xudong Wang,Guirong Zhang
Photothermal catalytic CO 2 hydrogenation via the reverse water–gas shift (RWGS) reaction enables sustainable CO production under mild conditions. However, the advancement of this promising technology is critically dependent on the development of high-performance catalysts, which continues to pose a key challenge in the field. Herein, a series of Cu x Zn 1-x Co 2 O 4 spinel catalysts with full solar spectrum absorption were synthesized via co-precipitation to synergize photothermal energy for efficient CO 2 conversion. The Cu/Zn co-doping strategy not only enhanced light absorption but also introduced abundant oxygen vacancies, fostering the formation of frustrated Lewis pairs (FLPs) that destabilize CO 2 ′s linear configuration and weaken C=O bonds. The optimized Cu 0.5 Zn 0.5 Co 2 O 4 catalyst demonstrated exceptional performance, achieving a CO 2 conversion rate of 418.7 mmol·g cat −1 ·h −1 with 93.1 % CO selectivity at 350 °C under light irradiation, alongside stable operation for more than 10 hours. The experimental characterization combined with theoretical calculation reveal that Cu 0.5 Zn 0.5 Co 2 O 4 possesses abundant oxygen vacancies, predominantly localized at the Zn tetrahedral sites. These structural defects play a crucial role in generating more active FLP sites, which in turn leads to significantly improved CO 2 activation efficiency. In-situ diffuse reflectance infrared Fourier transform spectroscopy ( in-situ DRIFTS) investigation elucidates key intermediates and the catalytic mechanism. This work provides a strategy for designing efficient non-precious metal photothermal catalysts through bimetallic doping and defect engineering to enhance CO 2 utilization.
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高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
W. Y. Li,C. Y. Li,Z. H. Xu,W. B. Dai
Various optical signals are popularly harnessed to realize anticounterfeiting, encryption, and photoluminescence (PL)-based sensing. However, most phosphors can only achieve single PL output under a fixed excitation, thus simultaneous attainment of multimodal PL behaviors remains an imperative pursuit. Herein, a highly integrated multimodal photon-, temperature-, and mechanically responsive Sr2Ga2SiO7:Zn2+/Er3+/Pr3+(SGS:Zn/Er/Pr) is designed/synthesized via a facile solid-state reaction, endowing tunable down/up-converted (DC/UC) PL, mechanoluminescence (ML), and long-persistent PL (LPL) owing to the synergistic effects of self-activated and dopant-induced electronic transitions. serves as both an emitter and a trap center for the self-(L)PL located at ∼468 nm under λex = 267 nm. These behaviors are further optimized by adjusting the content of and by forming a bridge () between trap levels upon Zn2+ incorporation. The excitation and Zn2+ content-dependent PL can be modified from blue to cyan via conflating dual self-PL from the 4T1 → 4A1 transition of Ga3+ at ∼402 nm and . The green DC/red UC PL from Er3+is observed under λex = 357 and 980 nm, respectively. Nonequivalent substitution of Pr3+ at the Sr2+site and the incorporation of Zn2+ can adjust the charge transfer band energy level position and optimize the trap distribution, achieving long-term storage and highly repeatable/efficient LPL/ML generation. Based on abundant PL multimodes, the single-phased SGS:Zn/Er/Pr shows promising applications in sophisticated anticounterfeiting and latent fingerprint detection. Concurrently, owing to the coupled energy levels 2H11/2/4S3/2 of Er3+and the pressure-dependent ML of Pr3+, the SGS:Zn/Er/Pr is also suitably applied as a temperature/stress sensing agent.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Jing Qu,Zhongmin Wang,Zhixiao Zhu,Zeba Khanam,Weijiang Gan,Sakariyau Babatunde Abdulkadir,Selvam Mathi,Jianqiu Deng,Feng Wang,M.-Sadeeq Balogun
Designing carbon-free electrocatalysts that can efficiently drive hydrogen evolution (HER), oxygen evolution (OER), and zinc-air battery (ZAB) reactions in alkaline media remains difficult because of the different kinetic requirements of each process. Herein, we demonstrates a carbon-free crystalline-amorphous (C-A) Cu 0.81 Ni 0.19 @CoN/Mo 2 N heterostructured nanosheets synthesized through a single-step annealing method that simultaneously forms a crystalline alloy core and an amorphous nitride shell. This direct route eliminates carbon supports and avoids multi-stage alloying or nitridation, resulting in tightly coupled C–A interfaces that accelerate charge transfer and stabilize active sites. The catalyst delivers low overpotentials of 43 mV for HER and 297 mV for OER at 10 mA cm −2 , enabling an overall water splitting (OWS) low voltage of 1.56 V. It also maintains excellent durability under harsh electrochemical conditions owing to the absence of carbon, mitigating agglomeration and degradation. Density functional theory calculations reveal that the Cu 0.81 Ni 0.19 /CoN optimizes hydrogen adsorption, while the Cu 0.81 Ni 0.19 /Mo 2 N promotes oxygen intermediate formation. Integrated into a flexible ZAB, the catalyst exhibits a high specific capacity of 811.6 mAh g −1 , a small voltage gap of 1.15 V at 50 mA cm −2 , and 150 h of stable cycling. A self-powered system coupling this flexible ZAB-OWS system further demonstrates the practical viability of this one-step-engineered C–A heterostructure for sustainable energy applications.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 13
·132505
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IF 3.721
Xiangyu Ren,Jie Tang,Cunying Xu,Shuxian Wang,Jianru Li,Jingling Lu,Yixin Hua,Qibo Zhang,Juanjian Ru
The electrodeposition behavior of Zn–Ni alloy on a Cu electrode has been studied in the choline chloride-urea-ethylene glycol (ChCl-urea-EG) based deep eutectic solvent (DES). The nickel and zinc sources are introduced into the solvent by the dissolution of nickel oxide (NiO) and zinc oxide (ZnO), respectively. Cyclic voltammetry indicates that the electroreduction of Ni(II) or Zn(II) species in the DES is a diffusion-controlled process and the diffusion coefficient of Zn(II) species is an order of magnitude larger than that of Ni(II) species. Under the examined condition, the anomalous codeposition of Zn–Ni alloy is observed, which is different from normal codeposition of Zn–Ni alloy in similar DESs using metal chlorides as precursor. The deposition potential is found to play an important role in controlling the composition and surface morphology of the resultant Ni-Zn alloys. The phase structure of the deposits depends on the Ni content, and changes from a mixture of η-phase and γ-phase to single γ-phase with (411) plane orientation. A mechanism for this electrodeposition process has been proposed on the basis of the formation of complex ions [NiO·urea·Cl]−, [ZnO∙urea·Cl]− and [ChCl·O·urea]2− in ChCl-urea-EG-ZnO-NiO electrolyte during the electrodeposition, emphasizing that the metal oxides were dissolve in DES by forming metal complex ions, the cathodic reduction of metal complex ions generates complex ions [ChCl·O·urea]2− with alloys (NixZny), and [ChCl·O·urea]2− is oxidized to release O2 at anode.
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JOURNAL OF POWER SOURCES
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2023
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IF 9.2
Kaiyuan Zhou,Han Yan,Qiben Tang,Zhiqiang Luo,Xingchao Wang,Fengshi Cai
Zn-organic batteries (ZOBs) are promising energy-storage device owing to their merits of high capacity, low cost, and sustainability. However, their electrochemical performance is limited by irreversible organic small-molecular cathode due to the shuttle effect of discharge intermediates. Here, we report on the use of a chemically cross-linked poly(vinyl alcohol) films with halloysite nanotubes (GA-PVA/HNTs) as a separator for ZOBs. The GA-PVA/HNTs separator with intrinsic electro-negativity of HNTs act as permselective shield for negatively redox organic resultants, thereby preventing the shuttling effect without sacrificing power. In order to illustrate the superior performance of the GA-PVA/HNTs separator, a battery using as-prepared GA-PVA/HNTs separator, benzoquinone (BQ) as the cathode and Zn as the anode displays a high initial capacity (435 mAh g −1 at 0.3C) and superior cycle performance (98% capacity retention after 200 cycles at 3C). Moreover, a flexible Zn||BQ battery based on GA-PVA/HNTs separator is constructed, achieving a highly stable capacity of 431 mAh g −1 under different bending conditions. This work promotes the development of high absorptivity separator for the flexible zinc batteries.
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高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Mangwei Cui,Yan Xiao,Litao Kang,Wei Du,Yanfeng Gao,Xueqin Sun,Yanli Zhou,Xiangming Li,Hongfei Li,Fuyi Jiang,Chunyi Zhi
As a promising anode for aqueous batteries, Zn metal shows a number of attractive advantages such as low cost, low redox potential, high capacity, and environmental benignity. Nevertheless, the quick growth of dendrites/protrusions on the “hostless” Zn anodes not only enlarges batteries’ internal resistance but also causes sudden shorting failure by piercing separators. Herein, we report a novel heterogeneous seed method to guide the morphology evolution of plated Zn. The heterogeneous seeds are sputtering-deposited quasi-isolated nano-Au particles (Au-NPs) that enable a uniform and stable Zn-plating/stripping process on the anodes. Tested on Zn|Zn symmetric cells, the Au-nanoparticle (NP) decorated Zn anodes (NA-Zn) demonstrate much better cycling stability than the bare ones (92 vs 2000 h). In NA-Zn|CNT/MnO2 batteries, this heterogeneous seed prolongs the lifetime of the device from ∼480 cycles up to 2000 cycles. This work offers a facile and promising Zn dendrite/protrusion suppressing route for the achievement of long-life Zn-ion batteries.
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DOI
IONICS
·
2026
·
IF 3.4
Gong Gu,Liu Xiangyu,Ma Hao,Lv Du,Luo Hao,Liang Miaomiao,Zhou Yuan,Wang Haiyang,Zhao Yuzhen,Lashari Najeeb ur Rehman,Miao Zongcheng
The development of high-performance supercapacitor electrodes relies on the rational design of material structures with optimized electrochemical properties. In this work, we report a two-dimensional sponge-like NiS 2 architecture synthesized via a MOF-derived sulfurization strategy. The unique hierarchical porous structure, featuring abundant mesopores and high specific surface area, facilitates efficient ion diffusion and provides numerous electroactive sites for redox reactions. The resulting NiS 2 electrode exhibits outstanding specific capacitance (1227.5 F g − 1 at 0.5 A g − 1 ) with good cycling stability in alkaline electrolyte. Moreover, the NiS 2 electrode demonstrates bifunctionality and can be effectively employed in aqueous Ni-Zn batteries, delivering high specific capacity and stable long-term performance. This study establishes NiS 2 as a promising electrode material for aqueous energy storage devices and provides a feasible synthetic pathway for designing high-performance transition metal sulfide electrodes.
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Small Science
·
2025
·
IF 8.3
Hailong Xuan,Xiaolong Cheng,Yu Yao,Yihong Gao,Pengcheng Shi,Fangzhi Huang,Yu Jiang,Yan Yu
Aqueous zinc (Zn) metal batteries (AZBs) have emerged as highly promising candidates for large-scale energy storage systems because of their inherent safety and cost-effectiveness. However, their practical implementation remains constrained by parasitic side reactions and uncontrolled dendrite growth at the metallic Zn anode. Herein, a microenvironment-controlled additive strategy is proposed via employing phytic acid-functionalized montmorillonite (MPA) nanosheets as electrolyte additives for highly durable AZBs. The MPA nanosheets spontaneously assemble onto the surface of the Zn anode through interfacial self-adsorption, effectively suppressing parasitic reactions. Moreover, the regulation of interfacial chemistry enhances the zincophilic characteristic, enabling precise modulation of Zn 2+ flux distribution and directing homogeneous Zn electrodeposition through spatially controlled ion coordination. As a result, the Zn||Zn symmetric cell with the MPA additives achieves a stable cycle for over 2800 h at 2 mA cm −2 . The assembled Zn||VO 2 full cell within the modified electrolyte maintains exceptional cycling stability of 89.5% after 1000 cycles. This work presents a facile and efficient microenvironment-regulated additive strategy for homogeneous Zn deposition, aimed at achieving highly reversible AZBs.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jiaqi Liang,Junyi Zhang,Qinyi Zhang,Changyan Sun
Ethyl maltol (EM) is prohibited in natural foods and residues of lincomycin hydrochloride (LH) pose potential health risks. Therefore, the accurate detection of these two substances is crucial for safeguarding food safety. The synthesized Zn-MOF fluorescent probe could be used to detect EM and LH through “turn-on” responses with the low detection limits of 7.86 and 62.5 nM respectively. Moreover, the filter strips based on Zn-MOF can achieve visual detection of EM and LH. The detection mechanism is attributed to the donor-acceptor electron transfer and the weak interaction between the analytes and Zn-MOF. Furthermore, the Zn-MOF probe can be used for the detection of EM and LH in real samples such as Baijiu and milk. The recoveries are in the range of 95.89 %–103.3 %, which confirms its practical application and provides a new strategy for food safety detection.
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高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Shixue Zhong,Yan Xin,Ming Lei,Shen Cai,Chen Zhao,Huai Zhang,Huajun Tian
Manganese dioxide (MnO2) is a promising cathode material for aqueous zinc-ion batteries (AZIBs) due to its considerable theoretical capacity, discharge voltage, high safety, and eco-friendliness. Here, a MnO2 composite with carbon materials was synthesized via a simple one-step precipitation method. The minor addition of carbon material significantly increases the yield of MnO2, which facilitates practical application in aqueous batteries. More importantly, during the precipitation process, the carbon material additive could regulate the growth morphologies of MnO2, contributing to increased specific surface area and alleviative Jahn–Teller distortion. Meanwhile, the incorporation of carbon materials improved the electrical conductivity, enhancing the electrochemical performance of the MnO2 composite. As a result, by employing the optimized cathode (MnO2@CNT), the full battery exhibits excellent specific capacity and maintains a stable cycling performance for over 1000 cycles at 3 C. Furthermore, its potential as a cathode material in sodium metal batteries is also demonstrated. This work provides a strategy for the practical utilization of MnO2 cathodes for AZIBs and contributes to realizing high-performance eco-friendly batteries.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Li Ding,Jiayu Lin,Zhiqiang Wang,Aixue Jia,Changwu Cai,Zhong Xie,Yongde Yan
The recovery of cerium via molten salt electrolysis with the liquid zinc (Zn) cathode is considered a highly promising strategy for rare earth resource recycling. To reveal the electrochemical reduction of cerium (Ce) ions and the alloy formation process on the Zn electrode, in this work, multiple electrochemical methods were adopted to study the electrode reactions and thermodynamic properties during the Ce deposition process at high temperatures. A concentration-dependent test of the co-deposition reaction indicated that the alloying behaviour of reduced Ce was affected by ion concentration. The electrochemical results showed that four Ce Zn alloys were formed in the electrode reaction. The Gibbs free energy of alloy formation was determined. Furthermore, in order to understand the reaction kinetics on the liquid electrode and the thermodynamic behaviour of the reduced Ce in the electrode, the exchange current density and activity coefficient during electrodeposition were determined by Tafel analysis and coulometric titration, respectively. The temperature dependence of both exchange current density and activity coefficient was further revealed
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