ACS Applied Energy Materials
·
2024
·
IF 5.4
Gang Ni,Mengmeng Sun,Ning Wang,Zhiqiu Pan,Fuhu Cao,Peng Cui,Chenggang Zhou
As promising candidates for large-scale energy storage applications, aqueous zinc ion batteries (AZIBs) face challenges due to the electrochemical instability of cathode materials and Zn anodes. Introducing additives into the electrolyte is an effective approach to improving the compatibility of electrodes. In this work, trace amounts of poly(acrylic acid) (PAA) are utilized as electrolyte additives in 1.0 M ZnSO4 to enhance the cycle performance of the Zn3[Fe(CN)6]2/Zn battery. PAA demonstrates strong interfacial engineering ability on both the cathode and anode. PAA directly reacts with the Zn anode, leading to the formation of PAA–Zn films growing on the anode surface. The interfacial film inhibits the parasitic hydrogen evolution reactions, reducing the generation of byproducts. Regulating the anode’s interfacial structure promotes the uniform deposition of Zn. The electrolyte with 0.8 wt % PAA additives enables a long cycle life exceeding 300 h at 5 mA·cm–2 and 2.5 mAh·cm–2 in Zn/Zn symmetric cells, along with a high Coulombic efficiency of 98.07% in Cu/Zn asymmetric cells. Meanwhile, PAA preferentially adsorbs on the surface of the Zn3[Fe(CN)6]2 cathode, inhibiting the dissolution of ferricyanide anions in aqueous solution and reducing the self-discharge behavior. Thanks to the interfacial regulation of PAA on both the cathode and anode, the cycle performance of the Zn3[Fe(CN)6]2/Zn full cell is significantly enhanced to nearly six times that without PAA additives. This work lays the groundwork for the development of electrolyte additives that can improve the electrochemical performance of both the cathode and anode of AZIBs.
研究领域:
电化学
·
能源存储
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材料科学
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
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IF 24.319
Menglu Xu,Yibing Zhang,Huaqin Yin,Jinnan Wang,Aimin Li,Philippe François-Xavier Corvini
Co-ZFO@Mn-CN with 1 O 2 and O 2 •− as main reactive oxygen species was synthesized for catalytic ozonation , which could efficiently degrade organic pollutants . EPR and XPS analysis indicated that lattice doping of Co induced formation of abundant of OVs, which could provide localized electrons for O 3 activation with the generation of HO 2 • /O 2 •− . 1 O 2 and H 2 O 2 were produced by the recombination of HO 2 • /O 2 •− . DFT calculation demonstrated that H 2 O 2 was deprotonated to generate HOO − , which preferred to form HOO-Mn-N X bonds with Co-ZFO@Mn-CN. Under the attack of O 3 , HOO-Mn-N X bonds were broken with the generation of HO 2 • and HO 3 • /O 3 •− , not only accelerating 1 O 2 production for organics degradation but also avoiding Mn(Ⅱ) sites oxidation . Combining advantages of OVs and HOO-Mn-N X , Co-ZFO@Mn-CN achieved 70–100% mineralization for different organic pollutants . Thus, this work provided a simple and efficient way for enhancing the utilization of O 3 by the synergistic effect of OVs and HOO-Mn-N X bonds, also improving ROS transformation.
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BIOELECTROCHEMISTRY
·
2023
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IF 5
Mengjiao Zhu,Yu Liu,Meiyue Wang,Tao Liu,Zhenyu Chu,Wanqin Jin
Owing to the high mortality and strong infection ability of COVID-19, the early rapid diagnosis is essential to reduce the risk of severe symptoms and the loss of lung function. In clinic, the commonly used detection methods, including the computed tomography (CT) and reverse transcription-polymerase chain reaction (RT-PCR), are often time-consuming with bulky instruments, which normally require more than one hour to report the results. To shorten the analytical period for testing the COVID-19 virus (SARS-CoV-2), we proposed an ultrafast and ultrasensitive DNA sensors to achieve an accurate determination of the DNA sequence by the RNA reverse transcription (rtDNA) of the SARS-CoV-2. A nanocubic architecture of the MnFe@Pt crystals was constructed to integrate both electrocatalysis and conductivity to greatly improve the biosensing performance. After the immobilization of a specific capture and report DNA on above nanocomposite, the rtDNA can be rapidly caught to the DNA sensor to form a double-helix structure, thus generating the current signal change. Within only 10 min, the as-prepared DNA sensors exhibited ultralow detection limit (1 × 10 −20 M) and wide linear detection range, together with an outstanding selectivity among various interfering substances.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Heng Fei,Junxia Shao,Hua Li,Najun Li,Dongyun Chen,Qingfeng Xu,Jinghui He,Jianmei Lu
g-C 3 N 4 (CN), which shows enormous potential for photocatalysis, has long been studied, but still exhibits an unsatisfactory degradation rate. Herein, dual cocatalysts, Br and ultrafine RhO x nanoparticles, were constructed on ultrathin CN for synergetic photocatalysis. Ultrathin CN increased the exciton separation efficiency, while cocatalysts Br and RhO x can accelerated electron and hole transfer simultaneously, maximizing the photocatalytic degradation performance of CN. This CN-Br 0.12 /2%RhO x degraded 10 ppm bisphenol A (BPA) in 9 min, which represents the fastest degradation rate reported to date. This excellent performance was also demonstrated by a larger photocurrent response, higher separation efficiency, and faster transfer rate for electron–hole pairs than CN. This work obtained an enhanced electron–hole separation efficiency and migration rate by combing ultrathin CN with dual-channel cocatalysts, leading to the best photocatalytic degradation performance reported for CN.
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ACS Applied Materials & Interfaces
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2021
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IF 9.229
Mojing Chen,Xiaoqiang Li,Yujiao Yan,Yanting Yang,Qunjie Xu,Haimei Liu,Yongyao Xia
Prussian blue analogues (PBAs) have been considered as promising cathodes for aqueous zinc-ion batteries because of their open framework for accommodating large ions, tunable valence state, and facile synthesis. Among PBAs, potassium manganese hexacyanoferrate (KMHCF) is favored due to its high working voltage, high specific capacity, and low cost. However, it suffers from severe capacity decay and poor rate capability, which are mainly a result of poor intrinsic conductivity, irreversible phase transition, transition metal dissolution, and structural collapse during charge/discharge cycling. These issues extremely limit its practical application. In order to solve these problems, conductive polypyrrole (PPy) was used to coat KMHCF microcubes to form KMHCF@PPy composites to achieve superior rate capability and prolonged cycle life. With the PPy coating, the KMHCF@PPy composite delivers a discharge capacity of 107.6 mA h g–1 after 100 cycles at 100 mA g–1, and even at 500 mA g–1 after 500 cycles, 64.2 mA h g–1 still remained. The excellent electrochemical performance can be attributed to the effects from PPy. On the one hand, PPy supplies an effective electronic transmission network for KMHCF to enhance the electronic conductivity. On the other hand, it plays the role of a protective layer to effectively inhibit the dissolution of Mn and the phase transition during the cycling.
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Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Jiliang Ma,Junqiang Zhang,Dongnv Jin,Shuangquan Yao,Runcang Sun
Synchronous photocatalytic water splitting and the reforming of a biomass-derived feedstock to generate hydrogen and high-value-added chemicals make full utilization of the biomass-water-splitting redox reaction; however, limited successes in this regard have been reported. Herein, incompletely polymerized graphitic carbon nitride co-doped with zinc/oxygen atoms (Zn 2 /O@IP- g -CN) was prepared via a step-by-step low-temperature calcination process with the assistance of melamine and zinc phthalocyanine, which successfully resulted in simultaneous photocatalytic water splitting and the reforming of biomass-derived monosaccharides to produce hydrogen (11436.7 μmol g −1 h −1 ) and lactic acid (92.6 %), respectively. Zn 2 /O@IP- g -CN exhibits a fast separation/migration rate and low resistance compared to those of pure CN, resulting in Zn 2 /O@IP- g -CN showing enhanced photocatalytic activity. The hydrogen release rate of 86.8 % and lactic acid yield of 89.0 % were retained compared to initial values when Zn 2 /O@IP- g -CN was reused in 5 th cycles. Poisoning experiments indicated that 1 O 2 , ·O 2 - , ·OH, and h + were all beneficial for lactic acid production.
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高影响因子
ELECTROCHIMICA ACTA
·
2022
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IF 7.336
Dengfeng Yu,Bo Yang,Huimin Liang,Gongyuan Zhao,Hong Zhang,Yuanlin Wang,Ye Sun,Miao Yu
Constructing hollow-structured materials is an efficient route to address the volume expansion of anode and enhance ion diffusion for sodium-ion battery (SIB). Superior to the single-walled products, multi-walled hollow-structured anode materials possess more storage sites, enhanced robustness, and higher volumetric capacity; nevertheless, synthesis of the multi-walled hollow structure often requires harsh synthesis conditionand complicated etching process. Herein, we report fabrication of Co 0.85 Se double-walled hollow cages coated by a nitrogen-doped carbon layer (Co 0.85 Se@CN) as high-performance anode materials for SIB. Using ZIF-67 as precursor, a facile ion exchange strategy is employed with no aid of high temperature treatment and complex etching process. The resultant Co 0.85 Se@CN exhibit distinct double-walled hollow structure with abundant lacunas on the walls, which increases the accessible area, shortens the ion transport path and most importantly provides appropriate buffer space against volume expansion. Moreover, the C protective layer on both sides of the inner- and outer-walls further benefits high conductivity, chemical stability, and robustness during charge/discharge process. As a result, the Co 0.85 Se@CN anode deliver a high reversible capacity of 402 mAh g –1 at 50 mA g –1 and 316 mAh g –1 at 100 mA g –1 after 100 cycles for SIB.
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Journal of Materials Chemistry C
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2020
·Vol. 8
·期 37
·12984-12992
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IF 7.059
Awais Siddique Saleemi,Muhammad Hafeez,Aqsa Munawar,Naeem Akhtar,Waseem Abbas,Muhammad Ehsan Mazhar,Zahid Shafiq,Anthony P. Davis,Shern-Long Lee
Arsenic(III) poisoning may lead to neurological disorders, heart diseases or carcinogenic effects due to long-term exposure. The presence of arsenic in drinking water is a widespread problem and presents an important analytical challenge. Among the methods for As(III) monitoring, electrochemical analysis offers fast response, low detection limits and high sensitivity. Here we report a novel system, which achieves exceptional performance without use of expensive noble metals by exploiting a metal oxide rich in oxygen vacancies (OVs). Novel OV-rich spinel ZnFe2O4 microspheres (ZF-Ms) were synthesized and applied to electrochemical monitoring of As(III) in underground drinking water by square wave anodic stripping voltammetry (SWASV) in acetate buffer (pH 6.0). To boost sensing capability, the surface of ZF-Ms was further wrapped with carbon and nitrogen rich nanodots (CNs) and modified with benzimidazolium-1-acetate ionic liquid (IL). The designed CN-wrapped IL-modified ZF-Ms (CN@ZF-Ms-IL) sensor offered an ultra-low detection limit of 0.0006 ppb (based on the 3σ method), high sensitivity (41.08 μA ppb−1) and a wide linear range (∼1–60 ppb) including the World Health Organization (WHO)'s desirable range (10 ppb). To the best of our knowledge, the system outperforms most alternatives based on noble metal electrodes and almost all those based on the reported metal-free electrochemical sensors. A possible sensing mechanism is proposed and supported with experimental evidence. Additionally, the system has been successfully applied to monitor arsenic-contaminated real ground drinking water collected from a flood-affected area, Muzaffargarh, Punjab, Pakistan.
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ENVIRONMENTAL RESEARCH
·
2024
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IF 7.7
Yaxuan Liu,Chen Yu,Huixia Lu,linan Liu,Jingchun Tang
Photocatalytic property of nano Ag is weak and its enhancement is important to enlarge its application. Herein, a novel strategy of constructing silver g-C 3 N 4 biochar composite (Ag-CN@BC) as photocatalyst is developed and its photocatalytic degradation of bisphenol A (BPA) coupled with peroxydisulfate (PDS) oxidation process is characterized. Characterization result showed that silver was evenly embedded into the g-C 3 N 4 structure of the nitrogen atoms format, impeding agglomeration of Ag by distributing stably on biochar. In optimum condition, BPA of 10 mg/L could be degraded completely at pH of 9.0 with a 0.5 g/L photocatalyst, 2 mM PDS in Ag-CN@BC-2 (Ag/melamine molar ratio of 0.5)/PDS system (99.2%, k = 4.601 h −1 ). Ag-CN@BC shows superior mineralization ratio in degrading BPA to CO₂ and H₂O via active radical way, including holes ( h ⁺), superoxide radicals (•O 2 ⁻ ), sulfate radicals (SO 4 • ⁻ ), and hydroxyl radicals (•OH). Proper amount of silver can be dispersed effectively by gC 3 N 4 , which is responsible for improving the visible-light absorbing capability and accelerate charge transfer during activation of PDS for BPA degradation, while biochar as carrier in the composite is supposed to enhance the photoelectric degradation of BPA by reducing the band gap and increasing the photocurrent of Ag-CN@BC catalyst. Ag-CN@BC exhibits excellent catalyst stability and photocatalytic activity for treatment of toxic organic contaminants in the environment.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Lei Zhao,Zilong Zhang,Tianyuan Zhang,Xiang Wang,Huanjun Peng,Jingdong Peng
The Fenton reaction in advanced oxidation processes is an ideal pathway for the generation of highly reactive hydroxyl radicals (•OH). However, its application in organic wastewater treatment is limited due to the requirement for acidic pH conditions and the additional introduction of H2O2 and Fe2+. In this study, FeOOH–CN/Ni(OH)2 composites were constructed as photocatalysis-self-Fenton catalysts by the amorphous FeOOH, which was uniformly anchored onto the surface of pure g-C3N4 (carbon nitride (CN)), and Ni(OH)2 was assembled on top. In this process, FeOOH–CN/Ni(OH)2 achieved self-sufficiency in H2O2 production while enabling efficient degradation of tetracycline hydrochloride (TCH) over a wide pH range, with a degradation ratio of up to 98.82%, and a first-order reaction rate constant (k) was determined to be 0.04925 min–1, representing a 10.15 times enhancement compared to the pristine CN. A reasonable S-scheme heterojunction charge migration mechanism was demonstrated based on valence-band X-ray photoelectron spectroscopy (VB-XPS), atomic force microscopy (AFM) equipped with a Kelvin probe force microscope, and density functional theory (DFT) theoretical calculations. Furthermore, degradation experiments demonstrated that the catalyst possesses remarkable degradation efficiency for other contaminants as well. On one hand, this significant improvement can be attributed to the formation of an S-scheme heterojunction between Ni(OH)2 and CN, which not only increased the specific surface area of the composite but also remarkably enhanced the separation and transfer efficiency of photogenerated charges. On the other hand, the synergistic effect between Ni and Fe effectively facilitated the activation of H2O2 and promoted the cycling of Fe3+/Fe2+. This study provided an efficient visible-light-driven photocatalysis-self-Fenton system, offering novel perspectives for enhancing Fenton-based processes and advancing the application of Fenton reactions in the treatment of organic wastewater.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Jingrong Zhai,Qiaoling Kang,Qiuyue Liu,Dawei Lai,Qingyi Lu,Feng Gao
Three-dimensional (3D) network structure of metal–organic framework (MOF) can accommodate outstanding electrocatalysis performances, but always collapse during the conversion to active materials or applications process. How to maintain the 3D network when producing active species is of great importance for full application of MOF. Herein, a new MOF material, In[Co(CN) 6 ] (In-Co PBA) nanocubes, are firstly synthesized. Through a controlled low-temperature deligandation process, the In-Co PBA nanocubes are transformed to a novel In 2 O 3 @In-Co PBA quasi-MOF nanocubes, which basically retain the 3D porous structure of PBA but with in situ generated In 2 O 3 nanoparticles inside. When used as CO 2 RR electrocatalyst , such a novel cubic composite structure exhibits excellent performances with faradaic efficiency of 85% for formate at a potential of −0.96 V and with current density of 31.5 mA·cm −2 at −1.32 V, surpassing most of the reported indium-based catalysts. The excellent performance can be attributed to the special composite structure, which provides not only active sites by In 2 O 3 nanoparticles to catalyze CO 2 RR, but also the 3D porous framework by quasi-MOF to accelerate gaseous exchange and electrolyte permeation and prevent the electrode choking. This work offers a new strategy for the design of post-transition metal catalysts and the structure design of quasi-MOF.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2021
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IF 4.098
Ling-Juan Yan,Chen Jiang,Ai-Ying Ye,Qiong He,Cheng Yao
Hydrazine plays an important role in chemistry, pharmaceuticals, agriculture and aerospace. However, it is not to be underestimated and has been identified as harmful to the human body. Therefore, it is significant and urgent to develop the detection of hydrazine in vivo and in vitro. Here, the probe TAN was synthesized by using benzothiazole derivatives as the fluorophore and 2,3-diaminomaleonitrile as the identified group to detect hydrazine. The presence of hydrazine resulted in a colorimetric and ratiometric fluorescence response of the probe based on the formation of hydrazone. The detection limit of TAN was 0.31 µM for hydrazine. In addition, the probe TAN was successfully used to visualize hydrazine in living HepG-2 cells and mouse with low cytotoxicity and excellent biocompatibility.
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