ACS Applied Materials & Interfaces
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2023
·
IF 9.5
Ling Meng,Chenying Song,Qixuan Lin,Guanghang Sun,Jin Long,Xiting Zhang,Hailong Li,Jian Hu,Siyu Ye
Lithium–sulfur (Li–S) batteries have high theoretical energy density but low sulfur utilization due to the inherent insulating nature of sulfur and the shuttle effect of polysulfides. Herein, the CO2-activation carbon paper was prepared by poly(p-phenylenebenzobisoxazole) (PBO) nanofiber and was first applied as an interlayer for efficiently alleviating the shuttle effect of polysulfides in Li–S batteries. This interlayer exhibits good flexibility and strength with rich −C═O and −COOH functional groups on the three-dimensional porous structure, which improves chemical adsorption on Li2Sx species and ion rapid diffusion via interconnected diffusion channels and thus enhances the electrochemical kinetics. The initial specific capacity is 1367.4 mAh g–1 and remains 999.8 mAh g–1 after 200 cycles at 0.2C and 780.1 mAh g–1 at 5C, and the Coulombic efficiency is high, up to 99.8%, which is much better than that for the carbon paper without CO2 activation. The highly conductive flexible PBO carbon paper may bring breakthroughs in performance and thus lead to more practical applications of Li–S batteries.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yang Chen,Min Zhang,Xin Wang,Xin Wang,Zainabu Majid,Kunlun Huang,Wentao Xu,Yunbo Luo,Cheng Nan
There is a need for facile yet reliable bacterial pretreatment and signal-graded strategies for current pathogens' point-of-care testing (POCT). Herein, we present a multifunction and portable 3D-printed magnetic separation device with graded lateral flow assay (LFA) for semi-automated pretreatment and rapid detection of Staphylococcus aureus ( S. aureus ) in food. The 3D-printed pretreatment device allows purification and enrichment of the [email protected] nanoparticles ( [email protected] NPs)-antibody- S. aureus complex. The recovery rate was 81.7–96.1% in actual food samples. [email protected] NPs-mediated signal amplification immunoassay achieved graded detection of S. aureus , reducing the detection limit from 10 3 CFU/mL to 10 2 CFU/mL, corresponding to the highest safety limit value (M) and acceptable level limit value (m) of S. aureus in many countries and organizations, respectively. This study paves the way for cost-effective and sensitive POCT with multiplexing potential in applications ranging from pretreatment of samples in the complex matrix as well as foodborne pathogens graded and rapid analysis.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2023
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IF 8.7
Chen Yang,Jian Yang,Shuangshuang Liu,Mingxue Zhao,Xu Duan,Hongli Wu,Lang Liu,Weizao Liu,Jiangling Li,Shan Ren,Qingcai Liu
Owing to its feasibility, efficiency in light-harvesting and effectiveness in the interfacial charge transfer between two n-type semiconductors, constructing heterojunction photocatalysts have been identified as an effective way for enhancing the photocatalytic properties. In this research, a C–O bridged CeO 2 /g-C 3 N 4 (cCN) Step-scheme (S-scheme) heterojunction photocatalyst was constructed successfully. Under visible light irradiation, the cCN heterojunction exhibited the photocatalytic degradation efficiency of methyl orange, which was about 4.5 and 1.5 times higher than that of pristine CeO 2 and CN, respectively. The DFT calculations, XPS and FTIR analyses demonstrated the formation of C–O linkages. And the calculations of work functions revealed the electrons would flow from g-C 3 N 4 to CeO 2 due to the difference in Fermi levels , resulting in the production of internal electric fields . Benefiting from the C–O bond and internal electric field, the photo-induced holes in the valence band of g-C 3 N 4 and the photo-induced electrons from conduction band of CeO 2 would be recombined when exposed to visible light irradiation, while leaving the electrons with higher redox potential in the conduction band of g-C 3 N 4 . This collaboration accelerated the separation and transfer rate of photo-generated electron-hole pairs, which promoted the generation of superoxide radical (•O 2 − ) and improved the photocatalytic activity .
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Nanomaterials
·
2023
·Vol. 13
·期 7
·1229
·
IF 5.3
Jing Li,Jun Li,Meng Shao,Yanan Yan,Ruoliu Li
At present, binary bimetallic sulfides are widely studied in supercapacitors due to their high conductivity and excellent specific capacitance (SC). In this article, NiCo-S nanostructured hybrid electrode materials were prepared on nickel foam (NF) by using a binary metal–organic skeleton as the sacrificial template via a two-step hydrothermal method. Comparative analysis was carried out with Ni-S and Co-S in situ on NF to verify the excellent electrochemical performance of bimetallic sulfide as an electrode material for supercapacitors. NiCo-S/NF exhibited an SC of 2081 F∙g−1at 1 A∙g−1, significantly superior to Ni-S/NF (1520.8 F∙g−1at 1 A∙g−1) and Co-S/NF (1427 F∙g−1at 1 A∙g−1). In addition, the material demonstrated better rate performance and cycle stability, with a specific capacity retention rate of 58% at 10 A∙g−1than at 1 A∙g−1, and 75.7% of capacity was retained after 5000 cycles. The hybrid supercapacitor assembled by NiCo-S//AC exhibited a high energy density of 25.58 Wh∙kg−1at a power density of 400 W∙kg−1.Keywords:MOF;self-sacrificing template;transition metal sulfides;supercapacitor
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JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 3
·1-9
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IF 2.8
Li Wanrong,Zhan Qingyan,Yang Po
This work aims to generate maleimides to polymers via Diels–Alder reaction and ring-opening metathesis polymerization (ROMP). Maleimides were converted to adducts through Diels–Alder reactions by reacting with cyclopentadiene or furan, then these adducts were generated to the corresponding polymers via ring-opening metathesis polymerization. The chemical structures of adducts were confirmed by 1 H NMR, FTIR and elemental analysis. After investigating the polymerization behaviors and properties, we found that the adducts could be converted into polymers via ROMP and affording polymers exhibited excellent performance. For example, the glass transition temperature of PBMC is 252 °C, 5% and 10% weight loss temperatures are successively 381 °C and 475 °C, and the relative dielectric constant ( D k ) and dissipation (D f ) at 1 Hz and 1 MHz are respectively 3.41 and 0.006, 3.35 and 0.020. Moreover, the adducts can be used to enhance other ROMP-derived polymers as the comonomers. We believe these may help researchers design and explore novel maleimides polymers and copolymers with promising properties.
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Qin Dong,Tao Wang,Die Su,Ruiyi Gan,Minhua Shao,Cunpu Li,Qingfei Liu,Zidong Wei
The commercialization of Li–S batteries has been seriously hampered by the infamous “shuttle effect” of soluble lithium polysulfide intermediates (LiPSs, Li 2 S x , 4 ≤ x ≤ 8) and sluggish sulfur species conversion kinetics. In this work, vinyl ferrocene and styrene were copolymerized onto a polypropylene (PP) separator to prevent LiPS shuttling based on the electrostatic and orbital interactions between ferrocene and LiPSs, which increased the reactivity of LiPSs. Therefore, the “shuttle effect” can be successfully suppressed by a separator that combines thermodynamic anchoring and kinetic acceleration for LiPSs.
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ACS Applied Energy Materials
·
2023
·
IF 6.4
Hua Yang,Yi Duan,Huiling Gu,Lihua Liu,Hongtao Guan,Chengjun Dong,Gang Chen
Metal–organic frameworks (MOFs) with porous structures are beneficial for electrochemical energy storage. Herein, the in-situ growth of the S-doped Ni-MOF nanosheet (S-NMN) on the surfaces of nickel foams was prepared via a facile solvothermal process. Owing to the rich active sites, small transport barrier, and excellent mechanical stability, the fabricated S-NMN-2 electrode displays a high specific capacity (1952 mF cm–2 at 1 mA cm–2), satisfactory rate performance, and remarkable cyclic stability. For practical application, the assembled S-NMN-2//AC device achieves a high energy density of 0.189 mWh cm–2 at the power density of 1.600 mW cm–2 with prominent cycling stability (93.27% capacity retention after 4000 cycles). The facile strategy of etching nickel foam demonstrates a new idea for developing high-performance supercapacitor materials.
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Catalysis Science & Technology
·
2023
·Vol. 13
·期 3
·898-909
·
IF 5
Haohui Gu,Feng Liang,Xiaohan Wang,Shuaibing Wu,Gongye Lv,Haijun Zhang,Shaowei Zhang,Lilin Lu,Zhijun Dong
The design of heterojunction photocatalysts is regarded as a very effective method to solve the high recombination rate of photogenerated charge carriers for CO2 photoreduction into hydrocarbons, and interface engineering is urgently required to achieve high efficiency. Herein, graphitic carbon nitride (g-C3N4, CN) was uniformly grown on the surface of nitrogen-doped rutile TiO2 (NT) nanorods by in situ deposition, and a NT@CN core/shell step-scheme (S-scheme) heterojunction system composed of NT nanorods and g-C3N4 was synthesised. The as-synthesised heterojunction containing 55 wt% g-C3N4 delivered the highest CO2 photoreduction activity (33.35 μmol g−1 for CO) without additional cocatalysts or external sacrificial agents, which was 7.1 times higher than that of bare NT nanorods. This improved CO2 reduction activity was attributable to the large surface area and impactful S-scheme heterostructure, which imparted the catalyst with sufficient visible-light harvesting ability, promoted the segregation and transformation of the photoinduced charge pairs, and enhanced the redox ability of the carriers. Concurrently, the NT@CN photocatalyst exhibited excellent reusability and stability. This work offers a new basis for designing and preparing rutile TiO2-based S-scheme heterojunctions with enhanced CO2 reduction performance.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Chen Li,Ketong Song,Chunxiao Hao,Wanting Liang,Xiaoyun Li,Wenjin Zhang,Ying Wang,Yuefei Song
A novel anti-fouling cation exchange membrane (CEM) of sulfonated polybenzimidazole (S-PBI) was fabricated by the polymer bulk grafting modification of poly (4,4′-diphenyl ether-5,5′-bibenzimidazole) with sodium styrene sulfonate . FTIR, TGA , XPS, SEM and AFM were used to characterize membrane properties and the results showed that the ion exchange capacity and hydrophilicity of S-PBI increased with increased degrees of grafting and the electric resistance decreased accordingly. When the mass ratio of O-PBI/SSS was 1:4, the electric resistance of S-PBI-4.0 was 4.5 Ω·cm 2 , while the ion exchange capacity was 2.3 meq/g. The ED experiment with the S-PBI-4.0 membrane exhibited good desalination rate (>96 %), high current efficiency (80.73 %) and low energy consumption (1.13 kW·h/kg), which were very close to the results of a commercial CEM (Neosepta CMX). What's more, because of its good hydrophilicity, the S-PBI-4.0 membrane had better anti-fouling ability than Neosepta CMX, which was manifested as less resistance increase after membrane fouled by bovine serum albumin and smaller resistance after membrane cleaned by deionized water . These results demonstrate that the S-PBI-4.0 membrane is an appropriate candidate CEM and helpful to expand the application of ED in high-salinity organic industrial wastewater treatment .
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MOLECULES
·
2023
·Vol. 28
·期 1
·340
·
IF 4.6
Jingqi Sun,Limin Jia,Xuwei Chen
Glutathione S-transferases (GSTs) are important type-II detoxification enzymes that protect DNA and proteins from damage and are often used as protein tags for the expression of fusion proteins. In the present work, octa-aminopropyl caged polyhedral oligomeric silsesquioxane (OA–POSS) was prepared via acid-catalyzed hydrolysis of 3-aminopropyltriethoxysilane and polymerized on the surface of graphene oxide (GO) through an amidation reaction. Glutathione (GSH) was then modified to GO–POSS through a Michael addition reaction to obtain a GSH-functionalized GO–POSS composite (GPG). The structure and characteristics of the as-prepared GPG composite were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), thermogravity analysis, and surface charge analysis. The specific binding interactions between glutathione and GST gave GPG favorable adsorption selectivity towards GST, and other proteins did not affect GST adsorption. The adsorption behavior of GST on the GPG composite conformed to the Langmuir isotherm model, and the adsorption capacity of GST was high up to 364.94 mg g−1under optimal conditions. The GPG-based solid-phase adsorption process was applied to the extraction of GST from a crude enzyme solution of pig liver, and high-purity GST was obtained via SDS-PAGE identification.Keywords:octa-aminopropyl caged polyhedral oligomeric silsesquioxane (OA–POSS);graphene oxide (GO);glutathione S-transferases (GST);adsorption;solid-phase extraction
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Journal of Cleaner Production
·
2022
·
IF 11.072
Xiaoman Li,Xiaolan Guo,Jiliang Niu,Jialiang Lin,Jianhua Cheng,Yongyou Hu,Yuancai Chen,Weiqiu Wen
The accumulation of antibiotics in the environment has caused worldwide concern and photocatalytic processes have shown attractive prospects for the elimination of antibiotics due to its sustainability, cleanliness and efficiency. In this study, a series of self-assembled hollow tubular Zn–In–S photocatalysts (Zn-doped In 2 S 3 , ZnIn 2 S 4 , and ZnS/ZnIn 2 S 4 ) were first designed by one-step sulfidation of Zn/In-MOFs. The as-synthesized microtubular structured Zn–In–S exhibited high surface area(107.61–127.26 m 2 /g), high porosity(0.25–0.52 cm 3 g −1 ) and high degradation rate(≥86%) towards tetracycline within 120 min. Moreover, the photoelectric properties and photocatalytic performance were dependent on the existence of Zn species. Particularly, the optimized hollow microtubular ZnS/ZnIn 2 S 4 composites exhibited ultrahigh photocatalytic degradation rate (>90%) within 1 h solar light irradiation. The kinetic constant reached 0.0379 min −1 , which was 2.96, 2.02, and 5.65 times higher than In 2 S 3 , ZnIn 2 S 4 , and ZnS respectively. The ultrahigh photocatalytic degradation efficiency originated from the formation of direct Z scheme heterojunction between ZnIn 2 S 4 and ZnS. The unique heterojunction enabled the effective separation of electron-hole pairs and the production of highly reactive oxidants (•OH, •O 2 − , h + ). Density functional theory(DFT) demonstrated a higher charge density near the Fermi level and higher affinity towards O 2 molecules, which contributed to the efficient interfacial charge mobility and O 2 activation. The work provides guidance for the modulation of ternary catalysts to maximize the virtues of photocatalytic activity .
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Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 15
·4459-4465
·
IF 6.641
Yang-Jie Lin,Bin-Wen Liu,Run Ye,Xiao-Ming Jiang,Long-Qi Yang,Hui-Yi Zeng,Guo-Cong Guo
Two new infrared (IR) nonlinear optical (NLO) chalcogenides, SrCdSnQ4 (Q = S and Se) (1 and 2), were obtained by mixing NLO-active metal chalcogenides and d10 metal tetrahedral motifs in an alkali metal-containing system. Their structures are constructed with edge- and corner-sharing CdQ4 and SnQ4 (Q = S and Se) units to form two-dimensional (CdSnQ4)2− layers, between which are embedded with Sr2+. Compounds 1 and 2 have moderate band gaps of 2.05 and 1.54 eV, respectively. They exhibit strong second-harmonic generation intensities that are comparable to that of the benchmark AgGaS2 using a 2040 nm laser. Furthermore, their laser-induced damage thresholds are 10 and 5 times higher than that of AgGaS2, respectively. The strong NLO efficiency of these two compounds can be ascribed to SnQ4 tetrahedra with a synergetic enhancement in the large distortion of CdQ4 tetrahedra, shedding light on the exploration of new IR NLO materials with mixed NLO-active and synergetic distorted motifs.
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