ACS Applied Energy Materials
·
2022
·
IF 6.959
Yuxing Gao,Chunli Wang,Dongming Yin,Zhaomin Wang,Fan Wu,Yong Cheng,Limin Wang
While vanadium oxides have garnered interest due to their high capacity and abundant valence states in aqueous zinc-ion batteries (AZIBs), there are many challenges to achieving long cycling stability and excellent rate capability resulting from poor electronic conductivity and sluggish reaction dynamics. Herein, we design a cathode material VNxOy/C derived from a self-assembled V-polydopamine complex via a one-step organic–inorganic hybrid reaction. Benefiting from a well-organized structure and nanosized particle embedding, the as-prepared VNxOy phase could favor zinc-ion insertion/extraction due to the strong affinity of N element with Zn2+. Systematic investigations show that the controllable strategy yields positive effects on the electrochemical performances including enhanced rate capability and cycling stability, which are superior to those of the V2O3/C cathode. As a result, we have achieved fast charging/discharging capability at 10 A g–1 and stability exceeding 700 cycles at 3 A g–1 with nearly 100% Coulombic efficiency. Interestingly, the pouch-cell-like devices with ∼24 mAh could light an LED effectively. This work may pave the way to obtaining highly active V-containing compounds with structure design to improve electrochemical performances of AZIBs.
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高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2022
·
IF 7.129
Naiyi Yin,Zeliang Han,Wenbin Jia,Yaqi Fu,Jingnan Ma,Xiaotong Liu,Xiaolin Cai,Yan Li,Xiaochen Chen,Yanshan Cui
Effects of vitamin C supplementation on the oral bioaccessibility of lead (Pb) present in contaminated soils were examined using a number of in vitro assays (PBET, SBRC, UBM and IVG). In the presence of vitamin C, an increase in Pb bioaccessibility was observed in the gastric phase by 1.3-fold (30.5%−85.5%) and in the intestinal phase by 3.1-fold (0.9%−58.9%). Lead mobilization was regulated by reductive dissolution of Fe(III) and sequestration of Pb on secondary Fe minerals. Sequential extraction by the Bureau Community of Reference (BCR) provided more evidence that reducible fraction and residual fraction were major contributor of gastric Pb bioaccessibility, as well as reduced fractions in intestinal Pb bioaccessibility. In addition, higher non-carcinogenic risks may occur based on target hazard quotient (THQ ≥ 1). For people exposed to Pb present in soil, the management of vitamin C supplements is of serious concern.
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PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Minghao Zhou,Yaqi Xue,Fei Ge,Jing Li,Haihong Xia,Junming Xu,Jun Zhao,Changzhou Chen,Jianchun Jiang
MOF-derived Ni-based bimetallic catalysts were found to be effective for the in-situ hydrogenation/hydrodeoxygenation of lignin-derived monophenols and dimers with isopropanol as the hydrogen-donor solvent (without external hydrogen). The synergistic effects of bimetallic catalysts were studied, and their catalytic properties afforded the best conversion rate of phenols and cyclohexanol/cycloalkane yields. The detailed physicochemical characterization was conducted by means of XRD, H 2 -TPR, NH 3 -TPD, and pyridine-IR analysis. The effects of reaction temperature (200–260 ℃) and reaction time (2–5 h) on the performance of lignin-derived monophenols and dimers were investigated. During the in-situ hydrogenation/hydrodeoxygenation of lignin-derived phenols, the steric effects and the effects of various functional groups, notably methoxy groups, were investigated. In-situ conversion of lignin-derived phenols with isopropanol was achieved over different Ni/M ratios of NiM@C (M = Co, Mo, and La) catalysts, from which NiLa 0.33 @C produced satisfactory yields of cyclohexanol/cycloalkanes.
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 41
·15656-15663
·
IF 8.067
Guangchun Song,Qi Zhang,Shuang Liang,Ying Yao,Menglin Feng,Zainabu Majid,Xiaoyun He,Kunlun Huang,Jin-Cheng Li,Nan Cheng
The rapid, efficient, and low-cost detection of heavy metal ions using sensors has attracted widespread interest from researchers due to the health risks posed by heavy metal pollution. In recent years, single atom nanozymes with uniformly dispersed active centers and precisely designed coordination structures have been developed and used for the rational construction of various sensors. However, there is a lack of technology available to detect heavy metal ions using the catalytic activity of nanozymes. In this study, we investigated the oxidase-like (OXD-like) catalytic activity of the single atom Ce-N-C (SACe-N-C) prepared in our previous studies. Notably, we found that both Fe3+ and Cr6+ could significantly enhance the electron conversion rates of Ce3+ and Ce4+ within the SACe-N-C nanozyme, which contributed to the OXD-like activity of the nanozyme. Therefore, we constructed a time-resolved sensor to detect Fe3+ and Cr6+ using the oxidative activity of the SACe-N-C nanozyme. The LOD for Fe3+ was 34.72 ng mL−1 in the linear range of 0.25–1.5 μg mL−1, and the recoveries were in the range of 88.66–113.24%. The LOD for Cr6+ was 93.65 ng mL−1 in the linear range of 0.5–5 μg mL−1, and the recoveries were in the range of 85.49–111.22%. The sensor could rapidly detect Fe3+ and Cr6+ at 30 s and 60 s, respectively. This study provides a promising time-resolved strategy for the rapid detection of Fe3+ and Cr6+ in food using the OXD-like catalytic properties of the SACe-N-C nanozyme.
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高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yitian Huang,Dandan Zhao,Yanjie Chen,Shupei Zhang,Feng Lin,Hong Dai
Iridium (Ir) complexes have gained remarkable development momentum as candidates for electrochemiluminescence , but their poor solubility in water media greatly limited their application in ECL area. Herein, a facile nanoprecipitation method by encapsulating tris(2-phenylpyridinato)iridium (Ir(ppy) 3 ) into pluronic block copolymers for preparing water-soluble Ir(III) complexes with high ECL emission efficiency was developed. Then, with F-127@Ir(ppy) 3 as the anode emitter and g-C 3 N 4 as the cathode emitter, a new ratiometric biosensor based on transition metal complexes was developed for the first time, which was used for ultra-sensitive detection of hepatitis C virus E2 protein. Notably, the ratiometric ECL signal could be mediated by using multifunctional Nb 2 C nanosheets (Nb 2 C NSs) with excellent electrocatalytic activity and superoxide dismutase activity, so as to enhance the ECL intensity of anode and quench the response of cathode ECL. Combining Nb 2 C NSs with the antibody and the specific recognition process, the proposed ECL ratio biosensor showed good performance for E2 with a linear range from 1 × 10 −3 ng/mL to 1 × 10 2 ng/mL and a detection limit of 8.39 × 10 −4 ng/mL. The work on designing water-soluble Ir (III) complexes with pluronic block copolymer provides an ingenious approach to broaden the application of poorly soluble complexes in bioassays.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Zhendong Yu,Jiachen Ma,Jinlan Dai,Shiyu He,Xiaoyi Huang,Yuancai Lv,Yifan Liu,Chunxiang Lin,Junfeng Chen,Minghua Liu
In this study, a bimetallic composite catalyst (Co–Fe@C) was fabricated with calcination at high temperature (800 °C) by using Co-MIL-101 (Fe) as the precursor. The characterization results showed that the resulted Co–Fe@C composite mainly consisted of carbon, FeCo alloys, Fe 3 O 4 , Co 3 O 4 and FeO, and owned evident magnetism. In addition, the Co–Fe@C was employed to activate the peroxydisulfate (PDS) to degrade a representative organic pollutant ( p -arsanilic acid, p -ASA) and the main factors were optimized, which involved 0.2 g L −1 of catalyst dosage, 1.0 g L −1 of PDS dosage and 5.0 of initial pH. Under the optimal condition, Co–Fe@C/PDS system could completely degrade p -ASA (20 mg L −1 ) in 5 min. In the Co–Fe@C/PDS system, SO 4 − · , Fe(IV) and ·OH were the main species during p -ASA degradation. Under the attack of these species, p -ASA was first decomposed into phenols and then transformed into the organics acids and finally mineralized into CO 2 and H 2 O through a series of reactions like hydroxylation, dearsenification, deamination and benzene ring opening. Importantly, most of the released inorganic arsenic species (93.40%) could be efficiently adsorbed by the catalyst.
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PubMed
高影响因子
EXPERIMENTAL EYE RESEARCH
·
2021
·
IF 3.467
Lei Tao,Danxue He,Chunyan Liao,Binxiang Cai,Chao Chen,Yan Wang,Jingmeng Chen,Zuguo Liu,Yalin Wu
Retinal pigment epithelium (RPE) cell apoptosis arising from all- trans -retinal (atRAL) is in close contact with the etiology of dry age-related macular degeneration (AMD) and autosomal recessive Stargardt's disease (STGD1), but its underlying mechanisms remain elusive. In this study, we reported that c-Jun N -terminal kinase (JNK) activation facilitated atRAL-induced apoptosis of RPE cells. Reactive oxygen species production and endoplasmic reticulum stress were identified as two of major upstream events responsible for activating JNK signaling in atRAL-loaded RPE cells. Inhibiting JNK signaling rescued RPE cells from apoptosis induced by atRAL through attenuating caspase-3 activation leading to poly-ADP-ribose polymerase (PARP) cleavage, and DNA damage response . Abca4 −/− Rdh8 −/− mice upon light exposure exhibit rapidly increased accumulation of atRAL in the retina , and display severe RPE degeneration, a primary attribute of dry AMD and STGD1. Reducing JNK signaling by intraperitoneally injected JNK–IN-8 was highly effective in preventing RPE atrophy and apoptosis in light-exposed Abca4 −/− Rdh8 −/− mice. These findings afford a further understanding for contribution of JNK activation by atRAL to retinal damage .
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Lin-Chang Liu,Hong-Lin Zhu,Yue-Qing Zheng
Ammonia borane (NH3BH3, referred to as AB) hydrolytic dehydrogenation is regarded as a feasible strategy for hydrogen production owing to its high hydrogen content, pollution-free nature, and high stability. Metal nitrogen-doped carbon materials (M-N-C) are considered as an ideal candidate support of catalysts with AB hydrolytic dehydrogenation due to the advantages of low cost, large specific surface area, rich defective site, and good chemical stability. In this work, tubular Ni@Ni-N-C was successfully synthesized by high-temperature pyrolysis, and then, Rh nanoparticles were decorated on the support Ni@Ni-N-C by impregnation and reduction to prepare a series of Rh/Ni@Ni-N-C. The best catalytic performance of catalysts is obtained using Ni@Ni-N-C with an Rh loading of 0.74 wt %, showing a turnover frequency as high as 782.18 min–1 and an apparent activation energy (Ea) as low as 25.86 kJ mol–1, which could be attributed to the strong interaction between Rh and the defective site of the support.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Guang Li,Juan Yang,Yulian Chen,Min Liu,Xiaowei Guo,Gairong Chen,Baobao Chang,Tianjing Wu,Xianyou Wang
Looking for a high-efficiency, durabile, and low-cost dual-functional oxygen electrocatalyst as the air electrode catalyst in rechargeable zinc-air batteries (ZABs) is urgently desirable but faces many challenges. Herein, we propose the preparation strategy of effectively using a bifunctional electrocatalyst (Fe–Nx/C) based on the zeolite imidazole organic framework-8 (ZIF-8) as the template agent, with surface modification coated by ferrocene (Fc) molecules followed by pyrolysis at high temperature under inert atmosphere. Benefiting from the surface modification of ZIF-8 with Fc molecules, more abundant multiple catalytic Fe/Fe–Nx/FeCx sites with high intrinsic activity are derived, the resultant Fe–Nx/C exhibits excellent potential gap (ΔE = 0.63 V) and durability, which is obviously superior to the Pt/C + IrO2 benchmark (ΔE = 0.77 V) and other state-of-the-art electrocatalysts. Furthermore, the assembled rechargeable ZABs employing the Fe–Nx/C as an air-electrode show a reduced charging–discharging potential difference of 0.603 V, high power density of 214.8 mW cm–2, and long-term cycling stability of more than 290 h at 2.0 mA cm–2. Therefore, this work presents a feasible strategy to prepare a high-efficiency and durability ORR/OER bifunctional electrocatalyst toward high performance ZABs and next-generation energy storage devices.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 5
·2106886
·
IF 18.808
Haisheng Gong,Zengxi Wei,Zhichao Gong,Jingjing Liu,Gonglan Ye,Minmin Yan,Juncai Dong,Christopher Allen,Jianbin Liu,Kang Huang,Rui Liu,Guanchao He,Shuangliang Zhao,Huilong Fei
Electrochemical H 2 O 2 production through the 2-electron oxygen reduction reaction (ORR) is a promising alternative to the energy-intensive anthraquinone process. Herein, by simultaneously regulating the coordination number of the atomically dispersed cobalt sites and the nearby oxygen functional groups via a one-step microwave thermal shock, a highly selective and active Co N C electrocatalyst for H 2 O 2 electrosynthesis that exhibits a high H 2 O 2 selectivity (91.3%), outstanding mass activity (44.4 A g −1 at 0.65 V), and large kinetic current density (11.3 mA cm −2 at 0.65 V) in 0.1 m KOH is obtained. In strong contrast to the typical Co N 4 moieties for the 4-electron ORR, the present Co N C catalyst possesses a low-coordinated Co N 2 configuration and abundant epoxide groups, which work in synergy for promoting the 2-electron ORR, as demonstrated by a series of control experiments and theoretical simulations. This study may provide an effective avenue to modulating the composition and structure of electrocatalysts at the atomic scale, leading to the development of new electrocatalysts with unprecedented reactivity.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 51
·期 1
·68-76
·
IF 1.938
Cui Xinying,Liu Li,Liu Xiaoyang,Li Yixin,Feng Yi,Ma Lijie,Liu Liangyu,Xue Ying,Zhu Yanchao,Wang Xiaofeng
Rice husks (RHs) are rich in silica and organic carbon components, which have been widely applied in lithium ion batteries. However, the natural structure of uneven dispersion between SiO 2 and amorphous C in RHs leads to poor electrical conductivity and structural integrity. In this work, SiO 2 /C composites were prepared by mechanical mixing and high-temperature carbonization from RHs, with coal tar electronic pitch (CTEP) or polyvinyl chloride (PVC) as the carbon coating agent, which imparted some improvement in cycling performance, initial coulombic efficiency (ICE), and rate performance. Compared with the high electrical conductivity of CTEP, PVC with low viscosity coated uniformly the surface of BM-SiO 2 /C, which is beneficial to providing both elastic and mechanical stability and keeping the structural integrity. BM-SiO 2 /C-PVC-6 exhibits a more stable cycling performance and higher specific capacity of 730 mA h g -1 after 100 cycles at 0.1 A g -1 , with the ICE of 60%. Hence, the application of carbon coating agent plays a vital role in improving the electrochemical performance of SiO 2 /C composites. PVC with excellent coating performance was selected to coat RHs-SiO 2 /C and the electrochemical performance was enhanced, which provides a method of converting biomass material into a useful storage device.
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高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 9
·期 4
·2101705
·
IF 6.147
Wancong Leng,Leilei Cui,Yang Liu,Yun Gong
By annealing [Mn(phen)H 2 O][V 2 O 6 ] (phen = 1,10-phenanthroline) in the presence of graphite template, MnV 2 O 4 /C microparticles are obtained, in which MnV 2 O 4 particles with one-layer or few-layer coating of graphene are anchored on the graphite sheets. The optimal sample, MnV 2 O 4 (p)/C-700 with a high carbon content (35.3 at. %) can deliver a large specific capacity of 410 mAh g −1 at 0.1 A g −1 with a high capacity retention of 94.3% over 1000 discharge/charge cycles at 20 A g −1 as cathode in zinc-ion battery. Ex situ X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectra, as well as elemental mappings and X-ray photoelectron spectroscopy of MnV 2 O 4 (p)/C-700 discern the partial phase transformation mechanism of MnV 2 O 4 →Zn 3 (OH) 2 V 2 O 7 (H 2 O) 2 during discharge/charge process. It is because the rich oxygen defects of MnV 2 O 4 can improve electrical conductivity, favor the electron transfer from V→Mn/O, thus facilitate the binding of Zn 2+ , and the captured Zn 2+ cannot be extracted, as evidenced by density functional theory calculations. Furthermore, it is found that O-deficiency can capture the water shell from the hydrated Zn 2+ , then the dehydrated Zn 2+ is easy to insert into MnV 2 O 4 with lower migration barrier of Zn 2+ (0.84 eV), leading to the structural reversibility of MnV 2 O 4 in cycling test.
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高影响因子
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