JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Rui Jia Liu,Ling Xu Yang,Ying Wang,Hui Jun Liu,Chao Liu Zeng
Vanadium-based MXenes are prospective as anode materials in energy-storage devices including lithium-ion batteries (LIBs) but limited by their charge-discharge capacities. Herein, partially-etched V 2 Al x CT z with the average particle size of ~400 nm was synthesized using 40 wt% HF or mixed NaF+HCl solutions as etchants, respectively. V 2 Al x CT z etched by 40 wt% HF for 96 h at room temperature (RT) has more exceptional charge-discharge performances against mixed NaF+HCl solutions, with an average reversible capacity of ~450 mAh g −1 at 0.1 A g −1 in the 120 cycles and ~301.2 mAh g −1 at 0.5 A g −1 after 200 cycles in LIBs. The effect of etchants on electrochemical performances and lithium-ion (Li-ion) storage mechanism of V 2 Al x CT z was discussed comprehensively. Additionally, a Li-ion full cell using LiFePO 4 as cathode has exhibited excellent electrochemical performance (150.4 mAh g −1 at 0.1 C). This work illustrates that partially-etched V 2 Al x CT z with the submicro-sized distribution is also a promising anode material for LIBs.
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MICROCHIMICA ACTA
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2021
·Vol. 188
·期 9
·1-9
·
IF 5.833
Gao Rongwei,Yang Xuelian,Yang Qiuju,Wu Yuanke,Wang Feng,Xia Qingyou,Bao Shu-Juan
Enzymes have demonstrated great potential in the development of advanced electroanalysis devices due to their unique recognition and catalytic properties. However, unsatisfactory stability and limited electron communication of traditional enzyme sensors seriously hinder their large-scale application. In this work, a simple and effective method is proposed to improve the stability of enzyme sensors by using sodium hyaluronate (SH) as a protective film, MXene-Ti 3 C 2 /Glucose oxidase (GOD) as the reaction layer, and chitosan (CS) /reduced graphene oxide (rGO) as the adhesion layer. Results demonstrate that the repeatability of the designed sensor increased by 73.3% after improving the adhesion between the reaction layer and the current collector and that its response ability was greatly enhanced. Moreover, the long-term stability of the electrode surface with SH protective film proved to be superior than that without protective film, which suggests that this design can effectively improve the overall performance of the enzyme biosensor. This work proposed a multi-tier synergistic approach for improving the reliability of enzyme sensors.
Our proposed protective and adhesion layer can greatly improve the stability of enzyme sensor and realize the rapid detection of glucose in serum sample.
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高影响因子
Biomaterials Science
·
2021
·Vol. 10
·期 2
·524-535
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IF 6.843
Xing Qin,Limei Qin,Jianping He,Qinghua Wang,Yongsheng Li,Dechao Niu
An ideal drug delivery system must have a high level of stability to ensure effective circulation and passive aggregation, good retention performance, and dynamic delivery and treatment monitoring. Thus, the development of a smart drug delivery carrier with both precise drug release and real-time detection remains a challenge. Herein, we propose a confined crosslink protocol to prepare an intelligent hybrid delivery system for auto-fluorescent monitoring, protonation-induced retention and precise drug release. The construction of this system involves the hydrolysis and condensation of (3-aminopropyl)triethoxysilane (APTES) silanes inside the Pluronic polymer micelles and thereafter a confined Schiff base crosslinking between glutaraldehyde (GA) and residual silane amino groups. The size of the intelligent docetaxel (DTX)-loaded nanosystem changes from ∼25 nm in blood circulation or normal tissues (pH ∼ 7.4) to ∼250 nm in slightly acidic environments (pH ∼ 6.5–7.0) owing to intra-molecular hydrogen bond-induced aggregation and imine cleavage-induced disintegration in the endosome (pH ∼ 5.0–6.2) along with auto-fluorescent monitoring contributing to the high-efficiency chemotherapy. This work provides a new method to construct smart, acid-responsive and fluorescent-guided drug-delivery carrier systems for efficient and safe tumor chemotherapy.
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CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Jichen Jia,Naiwei Gao,Ruiting Li,Shenglong Liao,Shanzhi Lyu,Yapei Wang
Casualties and severe damages of environmental resources resulted from wildfires are to some extent caused by belated evacuating personnel and fighting fires. It is considered that if the timely detection of the high temperature signal can be achieved in the early stage of fire disaster, the duly rescue actions brought by the early fire alarming can extensively avoid casualty accidents and the detrimental fire spread. Therefore, in this work, we fabricate a cross-linked polycaprolactone (PCL) network, and based on its shape memory property and subsequent electroless deposition process, we prepare a smart conductor with ability of switching between non-conductive and conductive at low and high temperatures respectively. Outdoor experiments present that this electrically “OFF-to-ON” conductor can effectively respond to a fire and play a crucial role in early fire alarming under simulated fire scene. The finite element analysis simulation results further prove the advantages of this material over the traditional thermocouple in detecting temperature changes.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Chaoqun Ma,Da Liu,Yanli Zhang,Jin Yong Lee,Jian Tian,Bingping Liu,Shihai Yan
Electrochemical ammonia synthesis (EAS) is considered to be an ecofriendly and sustainable method for artificial N 2 fixation. It is urgent to develop cost-effective and efficient electrocatalysts for EAS because present catalysts have low activity and poor selectivity. Herein, Fe 2 O 3 nanoparticles anchored on MoS 2 nanoflowers (Fe 2 O 3 @MoS 2 ) were developed as a highly efficient EAS electrocatalyst under ambient conditions. Electrochemical measurements indicate that Fe 2 O 3 @MoS 2 achieves a remarkable NH 3 yield of 112.15 μg h −1 mg cat −1 at − 0.6 V vs. reversible hydrogen electrode (RHE) and a high faradaic efficiency (FE) of 8.62% at − 0.4 V vs. RHE in 0.1 M Na 2 SO 4 , much better than the EAS performance of separate MoS 2 and Fe 2 O 3 . The superior electrochemical stability is confirmed by long-term (at least 24 h) continuous tests. Density functional theory (DFT) calculations show that Fe 2 O 3 @MoS 2 , compared to MoS 2 , is better able to activate inert N 2 molecules, as reflected by its greater adsorption energy (−0.32 eV vs. − 0.10 eV), greater N≡N bond distance (1.223 Å vs. 1.159 Å), lower energy barrier (0.40 eV vs. 0.78 eV), and greater charge transfer from active sites to N 2 molecules (1.16 e − vs. 0.62 e − ). Thus, this work provides new perspectives on the development of efficient EAS catalysts using MoS 2 -based materials as the substrate.
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BIOSENSORS & BIOELECTRONICS
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2021
·
IF 10.618
Zhuoyue Zhou,Zhao Yang,Li Xia,Houjin Zhang
Chiral analysis of amino acids (AAs) is of great importance in medical science due to the distinctive effect of AA isomers on human health. Although various chiral recognition techniques have been developed, the quantitative chiral recognition of low-level AA isomers remains challenging. Here, we combined the fiber optic SPR with an enzyme-substrate recognition mechanism to construct a direct-assay-type chiral AA biosensor. As a proof-of-concept attempt, a recently discovered Rasamsonia emersonii D-amino acid oxidase (ReDAAO) with a wide substrate spectrum and high stability was immobilized on the graphene oxide and gold nanorods composites (GO-AuNRs), using both EDC/NHS coupling and the gold-binding peptide (GBP) method. Such a biosensor can distinguish two AA isomers at the same concentration. It achieved specific detection of D-amino acids (D-AAs) with a linear range from 5x10 -4 mM to 30 mM. Furthermore, it showed good resistance to enantiomeric interference. When the percentage of D-AA increases in the isomer mixture, a good linear relationship between the D/(D + L)-AA ratio and SPR spectral shift was obtained. This unique combination of the enzyme , nanocomposite , and SPR taps into the rich reservoir of proteins for chiral receptors. It lays the foundation for protein-based chiral recognition of other clinically important small molecules in future biosensor designs.
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Small
·
2021
·Vol. 18
·期 5
·2104401
·
IF 13.281
Cheng-Yi Zhu,Jing-Kai Qin,Pei-Yu Huang,Hai-Lin Sun,Nie-Feng Sun,Yan-Lei Shi,Liang Zhen,Cheng-Yan Xu
2D van der Waals (vdW) semiconductors hold great potentials for more-than-Moore field-effect transistors (FETs), and the efficient utilization of their theoretical performance requires compatible high- k dielectrics to guarantee the high gate coupling efficiency. The deposition of traditional high- k dielectric oxide films on 2D materials usually generates interface concerns, thereby causing the carrier scattering and degeneration of device performance. Here, utilizing a space-confined epitaxy growth approach, the authors successfully obtained air-stable ultrathin indium phosphorus sulfide (In 2 P 3 S 9 ) nanosheets, the thickness of which can be scaled down to monolayer limit ( ≈ 0.69 nm) due to its layered structure. 2D In 2 P 3 S 9 exhibits excellent insulating properties, with a high dielectric constant ( ≈ 24) and large breakdown voltage ( ≈ 8.1 MV cm −1 ) at room temperature. Serving as gate insulator, ultrathin In 2 P 3 S 9 nanosheet can be integrated into MoS 2 FETs with high-quality dielectric/semiconductor interface, thus providing a competitive electrical performance of device with subthreshold swings (SS) down to 88 mV dec −1 and a high ON/OFF ratio of 10 5 . This study proves an important strategy to prepare 2D vdW high- k dielectrics, and greatly facilitates the ongoing research of 2D materials for functional electronics.
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Catalysts
·
2021
·Vol. 11
·期 11
·1274
·
IF 4.146
Ken-Lin Chang,Chun-Hung Liu,Paripok Phitsuwan,Khanok Ratanakhanokchai,Yung-Chang Lin,Cheng-Di Dong,Ming-Hsun Lin,Gordon C. C. Yang
Fungal delignification can be a feasible process to pretreat biomass for bioethanol production if its performance is improved in terms of efficiency through a few modifications. The aim of this study was to enhance the biodelignification pretreatment of rice straw using laccase in the presence of ionic liquid (1-Allyl-3-methylimidazolium chloride, [AMIM]Cl) or surfactant (TritonX-100). Addition of 750 mg/L [AMIM]Cl and 500 mg/L TritonX-100 increases the lignin removal to 18.49% and 31.79%, which is higher than that of laccase only (11.97%). The enzymatic saccharification process was carried out based on different strategies. The highest cellulose conversion, 40.96%, 38.24%, and 37.91%, was obtained after 72 h of enzymatic saccharification when the substrate was washed with distilled water after pretreatment of rice straw with laccase + TritonX-100, laccase + [AMIM]Cl, and laccase only, respectively. In addition, the morphology and structure changes of pretreated and untreated rice straw were studied. Both surface area and cellulose crystallinity are substantially altered after laccase + [AMIM]Cl and laccase + TritonX-100 pretreatment. Enhanced saccharification efficiency of rice straw was achieved by laccase pretreatment with ionic liquid or surfactant in a single system.Keywords:laccase;ionic liquid;surfactant;pretreatment;biomass;delignification
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ANALYTICA CHIMICA ACTA
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2021
·
IF 6.558
Qingfan Ren,Peipei Yang,Jiamin Liu,Yuying Chen,Sixue Ouyang,Ying Zeng,Peng Zhao,Jia Tao
Lanthanide-functionalized porous organic materials have been the promising candidates in the chemical and biological sensing. Considering the superior thermal and solvent stability of covalent organic frameworks (COFs), the development of lanthanide ions-functionalized COFs based sensing platform is meaningful, while remains to be a challenge. In this work, a new imine-linked COF which provides suitable coordination sites for Tb 3+ was constructed via the Schiff base reaction between P-phenylenediamine (Pda) and 2,6-Diformylpyridine (Dfp). Benefiting from its high signal-to-noise, the [email protected] shows excellent ability to determinate ciprofloxacin (CIP) with a detection limit of 3.01 nM. The measurement can maintain good stability in the presence of potential interference or in actual sample. Being washed with ethanol after each measurement, [email protected] can be recycled for five times. This work provides a novel alternative strategy for efficient construction of lanthanide-grafted COFs and may promote the development of porous organic materials based chemical sensing.
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ACS Food Science & Technology
·
2021
·
IF 0
Lingfeng Xu,Ying Zou,Mei Zeng,Siqi Duan,Kui Wu,Runlin Han,Limin Liu
Noninvasive and effective viscosity inspection during the deterioration process is expected to ease the burden of foodborne illnesses, since viscosity is closely related to spoilage extent. In this study, a novel molecular rotor, DPMBEQ, was developed to monitor the beverage microenvironmental viscosity alterations to achieve food safety inspection. This rotor comprised the typical triphenylamine donor and quinolinium acceptor and displayed aggregation-induced emission features, with a large Stokes shift of 184 nm in glycerol. DPMBEQ possesses a highly sensitive response toward viscosity change and features with good photostability and high selectivity in complex media. With the assistance of the fluorescent analytical technique, DPMBEQ achieved identifying the thickening effect of food gum. More importantly, DPMBEQ was explored to visualize viscosity variations during the beverage deterioration process. We expect that our trial can facilitate the continued perfection of food analytical methods toward food quality and safety inspection.
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Sustainable Energy & Fuels
·
2021
·Vol. 6
·期 3
·693-699
·
IF 6.367
Chao Chang,Xiaoyu He,Zhaoyang Han,Lilin Pei,Zongyu Wang,Yulong Ji
Developing energy harvesting and conversion technology is of great significance to mitigate the energy crisis and realize the sustainable development of human society. In this work, we designed and fabricated a thermal energy harvesting and conversion device by integrating a tube-based triboelectric nanogenerator (TENG) into a copper oscillating heat pipe (OHP). The tube-based TENG was composed of two copper electrodes uniformly distributed along a polytetrafluoroethylene (PTFE) tube. The copper OHP with an inner diameter of 2 mm had 6 turns and deionized water (DI) was chosen as the working fluid. When thermal energy was added to the OHP, liquid plugs in the OHP were thermally excited and flowed into the PTFE tube, resulting in the generation of an alternating flow of electrons between the two electrodes. This TENG-OHP system successfully generated more than 7.0 V of open-circuit voltage and more than 0.32 μW of output power. The generated electrical energy can be used to power many small electronics, such as capacitors and light-emitting diodes (LEDs). Therefore, these findings will offer an alternative approach to harvest and convert thermal energy heat in many devices or systems that involve the heat generation and heat transfer process.
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Journal of Cleaner Production
·
2021
·
IF 9.297
Maocai Shen,Zhuotong Zeng,Long Li,Biao Song,Chengyun Zhou,Guangming Zeng,Yaxin Zhang,Rong Xiao
As an important contributor of environmental microplastics , wastewater treatment plants have attracted extensive attention. The negative effect of suspended particulate matter on disinfection effect has also been established. The main aims of this study were to understand the potential effects of granular polyethylene microplastic and fibrous polyamide microplastics on ultraviolet and chlorine disinfection in water/wastewater treatment. In the laboratory, microplastics were exposed to different disinfection methods, which represented the disinfection dose and disinfection conditions of real water and wastewater treatment. Escherichia coli (8099) were selected as the experimental object. Microplastic suspended solids were closely related to water turbidity and UV transmittance at 254 nm. The occurrence of microplastics significantly reduced the efficiency of ultraviolet and chlorine disinfection in water/wastewater treatment, and the efficiency decreased with the increase of microplastics concentration or the decrease of disinfectant dosage. When the concentration of microplastics reached a certain level (>50 mg L −1 ), even if the exposure dose continued to increase, the disinfection efficiency could not be improved. Microplastics can reduce the concentration of disinfectants around them by reacting with disinfectants, thus protecting the microorganisms enriched on the surface of microplastics. Although the harsh conditions tested here are rarely met in a typical water treatment process, it represented a worse result. These results were intended to be used by water treatment plants to predict the effects of microplastics in the secondary effluent on UV and chlorine disinfection processes .
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危险品化学品经营许可证（带存储）