JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Denglei Zhu,Yufan Zheng,Yi Xiong,Chaojun Cui,Fengzhang Ren,Yong Liu
Aqueous rechargeable zinc-ion batteries (AZIBs) have gained extensive attentions due to their high volumetric capacity, low cost, and intrinsic safety. Nonetheless, their zinc metal anodes have been suffered from many issues, such as uncontrollable dendrite growth and undesired side reactions, which eventually degrade the capacity and cycle life. Herein, a thin sulfur-doped zinc oxide artificial interface film (≈200 nm) was in situ grown on zinc foil (ZnO:S@Zn) by a simple chemical bath deposition method. The density functional theory calculations revealed that the electronic conductivity of zinc oxide could be improved after sulfur doping. Characterization analyses and electrochemical measurements showed that this unique film could enhance the electrical conductivity of zinc anode inhibit the side reaction and induce Zn 2+ uniform deposition. As a result, the ZnO:S@Zn symmetric cell was stably cycled for 1700 h at 0.5 mA cm −2 with a stable voltage hysteresis of ~20 mV, and the full-cell pairing with MnO 2 cathode exhibited an excellent reversible capacity of 297.46 mAh g −1 after 300 cycles. This work offers a simple and effective way to fabricate a stable Zn metal anode for high performance AZIBs.
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高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Ying Li,Hua-Xu Ling,Yu Gao,Shuo Zhang,Bing Yan
The application of the excellent luminescence properties of lanthanide β-diketonate complex in water systems is the focus of the research in this field. We introduced the lanthanide β-diketonate complex into the framework of polyionic liquid (PIL) and SiO2 to prepare a lanthanide complex hybrid material fluorescent probe SiO2@PIL-Eu(nta)4, which can be used for the detection of bovine hemoglobin in water. Hydrophilic polyionic liquid grafted with SiO2 nanoparticles was the template of the hybrid material. The lanthanide complex was introduced into the prepared spherical polyionic liquid brushes by ion exchange. The obtained products were characterized by Fourier transform infrared spectra (FT-IR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), nuclear magnetic resonance (NMR), ultraviolet–visible (UV–vis) spectroscopy, and luminescence spectroscopy. The PIL matrix improved the fluorescence lifetime and quantum efficiencies of the lanthanide complex. The as-synthesized hybrid material was employed as a fluorescent probe for the bovine hemoglobin detection in an aqueous solution and the limit of detection is 0.0803 mg/mL. The addition of H2O2 can intensify the quenching of the fluorescent probe. In addition, we analyzed and discussed the quenching mechanism of the probe. The bovine hemoglobin can quench the fluorescence of the probe with the inner filter effect. In the presence of both H2O2 and bovine hemoglobin, the structure of the probe is oxidized by the superoxide anion in the system and the fluorescence of the probe is quenched by the mechanism of static quenching.
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Molecular Catalysis
·
2022
·
IF 5.089
Jian Li,Haiyang Zhang,Haixia Liang,Linfeng Li,Jinli Zhang
Ru/AC catalyst used in acetylene hydrochlorination reaction has several drawbacks such as poor dispersion, metal loss, serious carbon deposition, and insufficient active sites. To address these issues of traditional Ru/AC, in this study, the supported Ru-L x /AC catalysts were synthesized by the coordination of ruthenium precursor and several structural triazine ligands. The complexation of heteroatomic structure to Ru atom formed a local active domain, which is more conducive to the synergistic adsorption and activation of the initial reactants, and further optimizes the reaction microenvironment. The spatial topological structure with conjugated structures effectively promoted the transfer of electrons between the heteroatoms and the ruthenium precursors, facilitating the stabilization of active Ru species. The newly developed synthetic process also increased dispersion of reaction components and impeded the sintering of ruthenium components promoted by the local structural forces. The optimum Ru-1,3,5-triazine/AC (Ru-L 1 /AC) catalyst exhibited 162% higher acetylene conversion than the benchmark Ru/AC catalyst. The significantly improved activity and stability of the optimized catalyst will have a huge application prospect in industry.
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Advanced Materials Interfaces
·
2022
·Vol. 9
·期 9
·2102474
·
IF 6.389
Yu Dong,Yueheng Qi,Wenqing Zhao,Shaohui Yuan,Zihao Zeng,Yue Yang,Wei Sun,Peng Ge
As potential candidates, metal sulfides display strong storage abilities but suffer from serious volume swelling and polysulfide shuttling. Especially rich-sulfur materials, inferior reversible conversion reactions (from MS 2 to MS with S) can bring about major formation of sulfur. Herein, cubic-like Sn–Co–S materials with SnO 2 as catalyst are designed with various dimensional carbon. The as-resulted samples display uniform distributed particle size (≈5 µm), while cross-linked Sn–Co–S@carbon is successfully formed due to its rich surficial groups. Significantly, the formation of chemical bonds about Sn/Co–S–C is noted, facilitating ions/e-transfering and architecture enhancing. Meanwhile, owing to the endothermic effect of carbon, SnO 2 finally resulted, effectively limiting the so-called “shuttling effect” of polysulfide. Utilized as sodium-ion anodes, the optimized samples can deliver a capacity of 490 mAh g −1 at 0.5 A g −1 and ≈400 mAh g −1 above at 5.0 A g −1 . Assisted by the detailed kinetic analysis, it can be confirmed that the improvements of surface-controlling behaviors mainly come from the interfacial chemical bonds and strong-polar metal-oxides bonds. This work is expected to illustrate the roles of interfacial design and metal oxide catalysts for advanced energy storage materials.
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Journal of Energy Chemistry
·
2022
·
IF 13.599
Licheng Lou,Yuancai Gong,Jiazheng Zhou,Jinlin Wang,Xiao Xu,Kang Yin,Biwen Duan,Huijue Wu,Jiangjian Shi,Yanhong Luo,Dongmei Li,Hao Xin,Qingbo Meng
Photo-generated carrier recombination loss at the CZTSSe/CdS front interface is a key issue to the open-circuit voltage ( V OC ) deficit of Cu 2 ZnSnS x Se 4− x (CZTSSe) solar cells. Here, by the aid of an easy-handling spin-coating method, a thin PCBM ([6,6]-phenyl-C61-butyric acid methyl ester) layer as an electron extraction layer has been introduced on the top of CdS buffer layer to modify CZTSSe/CdS/ZnO-ITO (In 2 O 3 :Sn) interfacial properties. Based on Sn 4+ /DMSO (dimethyl sulfoxide) solution system, a total-area efficiency of 12.87% with a V OC of 529 mV has been achieved. A comprehensive investigation on the influence of PCBM layer on carrier extraction, transportation and recombination processes has been carried out. It is found that the PCBM layer can smooth over the CdS film roughness, thus beneficial for a dense and flat window layer. Furthermore, this CZTSSe/CdS/PCBM heterostructure can accelerate carrier separation and extraction and block holes from the front interface as well, which is mainly ascribed to the downward band bending of the absorber and a widened space charge region. Our work provides a feasible way to improve the front interfacial property and the cell performance of CZTSSe solar cells by the aid of organic interfacial materials.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yaqian Dong,Zhi Fang,Weiyou Yang,Bin Tang,Qiao Liu
Fabrication of amorphous electrocatalysts without noble metals for cost-effective full water splitting is highly desired but remains a substantial challenge. In the present work, we report a facile strategy for exploring integrated bifunctional electrocatalysts based on amorphous cobalt/nickel sulfide nanoflake arrays self-supported on carbon cloth, by tailoring competitive coordination of metal ions between glucose and 2-aminoterephthalic acid. Ultrahigh dispersion of binary metal active sites with balanced atomic distribution enables the optimization of catalytic properties for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in an alkaline solution. The obtained catalyst exhibits remarkably enhanced OER and HER activities as compared with its oxide counterpart and analogues with different Co/Ni ratios. It requires overpotentials of 296 and 192 mV to deliver a current density of 10 mA cm–2 for the OER and HER, respectively; it retains 96.6 and 96.9% activity after 32 h of OER and 36 h of HER tests at 10 mA cm–2, respectively. As directly used an anode and a cathode in an alkaline electrolyzer, a low cell voltage of 1.60 V could endow a water splitting current of 10 mA cm–2, outperforming the benchmark RuO2 and Pt/C-based electrolyzer at 1.72 V@10 mA cm–2. The current synthetic strategy may provide more opportunities for the design and direct synthesis of amorphous catalysts for overall water splitting and beyond.
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PubMed
高影响因子
Polymer Chemistry
·
2023
·Vol. 14
·期 27
·3166-3174
·
IF 4.6
Yumiao Su,Wenmu Li
Three types of non-conjugated homopolymer with blue light emission containing 5,11-dihydroindolo[3,2-b]carbazole derivatives in the main chain were prepared via an N–C coupling reaction. Compared with the conjugated small molecule 5,11-dihydroindolo[3,2-b]carbazole derivatives, the emission spectra showed a blue shift after the introduction of nonconjugated diphenyl sulfone as the electron-deficient unit. Meanwhile, the rigid and twisted configuration of the polymers possesses the characteristic of large steric hindrance, which can effectively avoid the aggregation-caused quenching (ACQ) phenomenon in the solid state. From a test of the redox potential and DFT calculations of the small molecular monomers and polymers, the electron distribution and the molecular orbital (HOMO–LUMO) change of 5,11-dihydroindolo[3,2-b]carbazole derivatives with the introduction of electron-withdrawing and electron-donating units was revealed. The non-conjugated polymers exhibited excellent thermal stability and solubility, endowing them with good application prospects. The resultant polymers with different side groups showed blue light emission spectra from 427 nm to 461 nm. This facile and versatile strategy to synthesize non-conjugated polymers with blue light-emission leads to a new avenue for highly efficient and stable blue OLEDs.
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SOLAR ENERGY
·
2023
·
IF 6.7
Chunkai Wang,Bin Yao,Yongfeng Li,Zhanhui Ding,Ding Ma,Ting Wang,JiaYong Zhang,Dongxu Zhang,Yue Liu,Ruijian Liu
The physical properties of CdS buffer layers and the interface quality between CdS layer and Cu 2 ZnSn(S,Se) 4 (CZTSSe) absorber have a significant impact on the performance of CZTSSe solar cells. In the present work, five types of CZTSSe solar cells with conventional structure (denoted as CdS- x -cells, x = 55, 60, 65, 70 and 75) were fabricated by using CdS prepared at deposition temperatures of 55, 60, 65, 70 and 75 ℃, respectively, as buffer layer, and influence mechanism of the deposition temperature of CdS layers on power conversion efficiency (PCE) of the CdS- x -cells was investigated. It is found that the PCE of the CdS- x -cells increases from 8.52% to 10.36% as the deposition temperature rises from 55 to 60 ℃ but falls from 10.36% to 7.14% from 60 to 75 ℃. The analysis on the photovoltaic and electrical parameters indicates that the increase in PCE is predominantly derived from the decreased reverse saturated current density (J 0 ), followed by the decreased series resistance (R S ) and increased shunt resistance (R Sh ). The decreased PCE with the further increasing deposition temperature is mainly contributed from the increased J 0 , followed by the decreased R Sh and photogenerated current density (J L ). The influence mechanism of deposition temperature of the CdS layer on PCE is suggested via quantitatively analysis of influence of electrical, optical properties and crystal quality of CdS prepared at various deposition temperatures on J L and electrical parameters of CdS- x -cells. This work is helpful for improvement of PCE of CZTSSe solar cells by modification of properties of buffer layer.
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高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 9
·1571
·
IF 5.3
Xamxikamar Mamat,Haji Akber Aisa,Longyi Chen
Acetaminophen (N-acetyl-p-aminophenol, APAP) is regularly used for antipyretic and analgesic purposes. Overdose or long-term exposure to APAP could lead to liver damage and hepatotoxicity. In this study, the approach of enhanced electrochemical detection of APAP by nanostructured biomass carbon/silver was developed. Porous biomass carbon derived from Elaeagnus Angustifolia gum was prepared by pyrolysis with co-doping of electron-rich elements of nitrogen, sulfur, and phosphorus. The electrodeposition of silver onto a glassy carbon electrode modified with porous carbon could enhance the sensing signal towards APAP. Two linear ranges from 61 nM to 500 μM were achieved with a limit of detection of 33 nM. The developed GCE sensor has good anti-interference, stability, reproducibility, and human urine sample analysis performance. The silver-enhanced biomass carbon GCE sensor extends the application of biomass carbon, and its facile preparation approach could be used in constructing disposable sensing chips in the future.Keywords:acetaminophen;nanostructured porous carbon;electrodeposition;silver enhancement;modified GCE;electrochemical sensing
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 1
·57-69
·
IF 3.591
Shengming Xu,Jing Xu,Linying Hu,Ye Liu,Lijun Ma
In this paper, NiCo2S4 was coated on the surface of WS2 of a 1T/2H mixed phase by a two-step hydrothermal method to form an in situ core–shell structure. The unique S-scheme heterojunction of the NiCo2S4@WS2 core–shell composite photocatalyst improved the easy recombination of carriers caused by the narrow band gap of NiCo2S4 and WS2, and improved the photocatalytic hydrogen production performance. The loading ratio of NiCo2S4@WS2, the addition of Eosin Y, and the pH value of TEOA were optimized. Under the optimal conditions, the hydrogen production rate reached 5.814 mmol g−1 h−1, which is about 8.55 times and 3.35 times the hydrogen evolution rates of NiCo2S4 and WS2, respectively. The composite catalyst exhibits excellent charge separation efficiency in photoelectrochemistry, PL and BET tests, carrier transport rate and large specific surface area that can provide more active sites, which are the main factors for the improvement of the hydrogen evolution performance. This paper demonstrates new design strategies to drive efficient photocatalytic hydrogen production by building in situ core–shell structures and optimizing the carrier transport paths, which will yield new insights.
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高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 33
·期 4
·1100-1108
·
IF 3.665
Kaiqi Li,Xiliang Liu,Long Chen,Zuochun Xiong,Chengdong Xiong,Dongliang Chen
Amino-functionalized six-membered cyclic carbonate 5-((2-nitrobenzyl) amino)-1,3-dioxan-2-one (NBAC) was synthesized with 2-nitrobenzyl group as photolabile protecting group. The following copolymerization was carried out by using l -lactide as comonomer and Sn (Oct) 2 as catalyst. The amino-functionalized polymer P(LA- co -AC) was obtained by ultraviolet irradiation of P(LA- co -NBAC) to remove the protecting group. The structures of products were confirmed by 1 H nuclear magnetic resonance (NMR) and 13 C NMR analysis. The pendant amino groups not only resulted in an enhancement of the hydrophilicity, but also played a role of antibacterial effect due to the positive charge imparted to the material.
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PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
·
2021
·
IF 3.963
Zhi-Xiang Liu,Xiao-Rong Xing,Xin-Hao Liang,Jian-hao Ding,Yi-Jiangcheng Li,Ying Shao,Fu-An Wu,Jun Wang,Sheng Sheng
Glyphodes pyloalis Walker is a destructive pest on mulberry trees and poses a significant threat to the sericultural industry in China. Phoxim and chlorfenapyr are two commonly used insecticides in mulberry fields. Glutathione-S-transferases (GSTs) comprise a multifunctional protein superfamily that plays important roles in the detoxification of insecticides and xenobiotic compounds in insects. However, whether GSTs participate in the tolerance of phoxim and chlorfenapyr in G. pyloalis is still unknown . To better understand the mechanism of insecticide tolerance in G. pyloalis , the enzymatic activity of GSTs was evaluated under phoxim and chlorfenapyr exposure, respectively. GST enzyme activity was significantly increased after 12, 36 and 48 h of phoxim treatment and 12, 24, 36 and 48 h of chlorfenapyr treatment. Subsequently, eighteen GST genes were identified from the larvae transcriptome of G. pyloalis . Among these, ten GpGSTs had GSH-binding sites and fifteen GpGSTs had variable hydrophobic substrate-binding sites. The expression levels of Delta-GpGST and Epsilon-GpGST genes were significantly influenced by phoxim and chlorfenapyr treatment, and by the time post insecticide application . Furthermore, after silencing GpGST-E4 , the mortality rate of G. pyloalis larvae was increased when they were exposed to chlorfenapyr, but it did not significantly alter when the larvae were exposed to phoxim. Our results indicated the vital roles of GpGSTs in the tolerance of insecticides and this action depends on the categories of insecticides. The present study provides a theoretical basis for elucidating insecticide susceptibility and promotes functional research on GST genes in G. pyloalis .
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