Journal of Analysis and Testing
·
2023
·Vol. 7
·期 2
·110-117
·
IF 4.7
Luo Yujie,Ye Qichao,Xie Tianjin,Xie Jiali,Mao Kai,Zou Hongyan,Li Yuanfang,Huang Chengzhi,Zhen Shujun
Traditional detection of thiodiglycol (TDG), a metabolic marker for sulfur mustard poisoning, requires not only professional operators, but also expensive reagents and large instruments. Herein, we developed a novel molecular imprinted polymers (MIPs)-based lateral flow assay (LFA) strategy for the quick, sensitive, and selective detection of TDG. Gold nanoparticles (AuNPs), MIPs, and metallothioneins (MTs) were respectively loaded on the conjugate pad, test line (T line) and control line (C line). After adding TDG, AuNPs on the conjugate pad reacted with TDG through the Au–S bond first. Then, under the action of capillary force, the conjugates of TDG and AuNPs were trapped by the MIPs as they traveled to the T line, and the residual AuNPs bound with the MTs on the C line, exhibiting two obvious red bands on T line and C line, respectively. In contrast, a single red band could be observed on C line without TDG. This method exhibited a wide linear range from 10.0 pg/mL to 10,000.0 ng/mL and its limit of detection (LOD) was as low as 0.41 pg/mL. This method was successfully utilized to detect TDG in human urine, presenting significant potential in the point-of-care testing of TDG in clinical samples of the sulfur mustard poisoning patients.
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IONICS
·
2023
·Vol. 29
·期 7
·2925-2933
·
IF 2.8
Wang Lu,Li Jingjing,You Junhua,Wang Zhiwei,Qi Xiaojing,Xu Jingsheng
NiCo 2 O 4 /NiMoO 4 hierarchical composite structure is used for high-performance supercapacitors electrode materials. The electrode material is grown directly on the conductive carbon cloth, which effectively reduces the contact resistance between the collector and the active material, and provides a favorable skeleton structure for NiCo 2 O 4 /NiMoO 4 . In this work, NiCo 2 O 4 /NiMoO 4 electrodes were prepared under optimal conditions of primary hydrothermal time of 12 h, annealing temperature of 350 °C, and secondary hydrothermal time of 8 h. The optimized hierarchical NiCo 2 O 4 /NiMoO 4 electrode exhibits a high areal capacitance of 3.85 F·cm −2 (at a current density of 4 mA·cm −2 ) and better cycle stability than the NiCo 2 O 4 and NiMoO 4 electrode, respectively. The constructed asymmetric supercapacitor NiCo 2 O 4 /NiMoO 4 //AC has a satisfactory energy density of 38.69 Wh·kg −1 at 228.56 W·kg −1 power density. At the current density of 4 mA·cm −2 , ASC devices still have a capacity retention rate of 90.88% after 5000 cycles, indicating their potential application in energy storage devices.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 27
·71088-71102
·
IF 5.8
Fan Xinfei,Liu Na,Yang Jia,Yu Yueling,Xu Yuanlu,Song Chengwen,Liu Yanming
Persulfate activation is emerged as an alternative applied in environment remediation, but it is still a great challenge to develop highly active catalysts for efficient degradation of organic pollutants. Herein, a heterogeneous iron-based catalyst with dual-active sites was synthesized by embedding Fe nanoparticles (FeNPs) onto the nitrogen-doped carbon, which was used to activate peroxymonosulfate (PMS) for antibiotics decomposition. The systematic investigation indicated the optimal catalyst exhibited a significant and stable degradation efficiency of sulfamethoxazole (SMX), in which the SMX can be completely removed in 30 min even after 5 cycle tests. Such satisfactory performance was mainly attributed to the successful construction of electron-deficient C centers and electron-rich Fe centers via the short C-Fe bonds. These short C-Fe bonds accelerated electrons to shuttle from SMX molecules to electron-rich Fe centers with a low transmission resistance and short transmission distance, enabling Fe (III) to receive electrons to promote the regeneration of Fe (II) for durable and efficient PMS activation during SMX degradation. Meanwhile, the N-doped defects in the carbon also provided reactive bridges that accelerated the electron transfer between FeNPs and PMS, ensuring the synergistic effects toward Fe (II)/Fe (III) cycle to some extent. The quenching tests and electron paramagnetic resonance (EPR) indicated O 2 ·− and 1 O 2 were the dominant active species during the SMX decomposition. As a result, this work provides an innovative method to construct a high-performance catalyst to active sulfate for organic contaminant degradation.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2023
·Vol. 40
·期 9
·2149-2158
·
IF 2.7
Li Chengfeng,Lyu Qishen,Li Zheng,Yang Shuliang,Sun Yong,Tang Xing,Zeng Xianhai,Lin Lu
The hydrogenation of biomass-based furan compounds is an important step for the catalytic valorization of biobased chemicals. In this work, Ru-based catalysts supported on different supports, such as HY, MgO and Amberlyst-15, were prepared and estimated for the hydrogenation of dimethyl 2,5-furandicarboxylate (FDMC). Among them, Ru/HY provided a desirable yield of 99.4% for tetrahydrofuran-2,5-dicarboxylic acid dimethyl ester (THFDMC) under 90 °C and 3 MPa H 2 . Based on catalyst characterization, Ru/HY could offer more surface Ru 0 species and carbon radical intermediates than other catalysts, which could largely favor the activation of hydrogen and then promote the hydrogenation of FDMC over Ru/HY.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 16
·3275-3284
·
IF 4.3
Zhang Qiaoli,Lv Jiale,Xia Junmei,Wang Liangliang,Qu Gang,Yang Yuntao,Yang Yang,Liu Shilei
Carbamate nerve agents (CMNAs) are a type of lethal cholinesterase inhibitor with one or more quaternary amine centres and aromatic rings. CMNAs have been recently added to the Annex on Chemicals of the Chemical Weapons Convention (CWC) and Schedules of Controlled Chemicals of China. In this study, a rapid, sensitive and selective method was developed for the fluorescence detection of ambenonium chloride (AC) through host-guest and electrostatic dual interactions between AC and cyclodextrin/11-mercaptoundecanoic acid (CD/MUA) dually functionalized gold nanoclusters (AuNCs). Through this method, AC was detected with a limit of detection of 10.0 ng/mL. Method evaluation showed high selectivity towards AC over other related compounds. The practical applicability was verified, as satisfactory recoveries were obtained for AC spiked in river water and urine, as well as Proficiency Test samples from Organisation for the Prohibition of Chemical Weapons (OPCW). In addition, a fluorescence sensing array comprising four AuNCs was designed to distinguish six carbamates and structurally similar compounds. This method provides a potential approach for the rapid, sensitive and selective recognition and detection of CMNAs. Graphical Abstract
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CATALYSIS LETTERS
·
2023
·
IF 2.8
Zhong Zhihao,Liu Yalan,Liu Shantang
To develop and design highly efficient composite oxide nanoparticles for the combustion of chlorinated volatile organic compounds (CVOCs), a series of Co 3 O 4 /In 2 O 3 catalysts were synthesized and tested for the catalytic oxidation of chlorobenzene (CB) as a typical example for CVOCs. The catalytic performance of as-prepared samples manifested that In x Co 1 O y nanorods catalysts with an appropriate proportion of In/Co exhibited superior catalytic activity better than that of pure Co 3 O 4 nanorods, indicating that the strong interactions between cobalt oxide and indium oxide assisted the degradation of CB. To understand the synergistic mechanism, a series of experimental characterization have been employed to explore the physicochemical properties of the catalysts. The result indicates that the introduction of In 2 O 3 increases the Co 3+ contents and the mobility of surface oxygen species, which synergistically contribute to the degradation process of chlorobenzene. Furthermore, the intermediates that appeared in the process of CB degradation on the In 3 Co 1 O y catalyst have been monitored by in situ DRIFTS. The detailed reaction mechanism is established by the analysis of the intermediates. Graphical Abstract
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Light-Science & Applications
·
2023
·Vol. 12
·期 1
·1-10
·
IF 19.4
Gu Kai,Zhong Haizheng
Light-to-heat conversion has been intensively investigated due to the potential applications including photothermal therapy and solar energy harvesting. As a fundamental property of materials, accurate measurement of light-to-heat conversion efficiency (LHCE) is of vital importance in developing advanced materials for photothermal applications. Herein, we report a photothermal and electrothermal equivalence (PEE) method to measure the LHCE of solid materials by simulating the laser heating process with electric heating process. The temperature evolution of samples during electric heating process was firstly measured, enabling us to derive the heat dissipation coefficient by performing a linear fitting at thermal equilibrium. The LHCE of samples can be calculated under laser heating with the consideration of heat dissipation coefficient. We further discussed the effectiveness of assumptions by combining the theoretical analysis and experimental measurements, supporting the obtained small error within 5% and excellent reproducibility. This method is versatile to measure the LHCE of inorganic nanocrystals, carbon-based materials and organic materials, indicating the applicability of a variety of materials.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2023
·Vol. 49
·期 7
·2827-2842
·
IF 3.3
Hao Tianran,Sun Shiping,Xu Hongliang,Yu Han,Cao Wenbo,Shao Gang,Fan Bingbing,Wang Hailong,Lu Hongxia
Porous g-C 3 N 4 composed of nanosheets (p-gCN-NS) was synthesized through firstly grinding the hydrochloric acid-treated melamine with ammonium chloride (NH 4 Cl) and then calcining the mixture at 550° C for 2 h. The photocatalytic properties were determined by degrading Rhodamine B (RhB) and tetracycline (TC) aqueous solution (10 mg/L, 100 mL). Results show that the crystallinity, size and thickness of g-C 3 N 4 in p-gCN-NS reduced dramatically compared with those in g-C 3 N 4 sample synthesized without the addition of NH 4 Cl (gCN). Specific surface area of p-gCN-NS was 63.65 m 2 ·g −1 , which was 6.7 times that of gCN. After photocatalysis for 50 min, the degradation rate of RhB achieved 99.32% by p-gCN-NS (100 mg), whose reaction rate constant ( k = 0.09317 min −1 ) was 10.6 times higher than that of gCN. p-gCN-NS also exhibited excellent photocatalytic activity for degrading colorless tetracycline aqueous solution. The significant improvement of photocatalytic performance can be credited to the reduced sized and thickness of g-C 3 N 4 , higher specific surface area and pore structure, as well as the weakened recombination rate of photogenerated electron–hole pairs in p-gCN-NS. This work provides a feasible and facile method for synthesis porous g-C 3 N 4 composed of nanosheets with excellent photocatalytic performance.
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BMC Oral Health
·
2023
·Vol. 23
·期 1
·1-10
·
IF 2.9
Lv Silei,Fan Wei,Fan Bing
Background Enterococcus faecalis (E. faecalis) is frequently isolated from root canals with failed root canal treatments. Due to the strong ability of E. faecalis to resist many often-used antimicrobials, coping with E. faecalis infections remains a challenge. The aim of this study was to investigate the synergistic antibacterial effect of low-dose cetylpyridinium chloride (CPC) and silver ions (Ag+) against E. faecalis in vitro.Methods The minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC) and the fractional inhibitory concentration index (FICI) were used to confirm the existence of the synergic antibacterial activity between low-dose CPC and Ag+. Colony-forming unit (CFU) counting, time-killing curve and dynamic growth curve were used to evaluate the antimicrobial effects of CPC and Ag+ combinations against planktonic E. faecalis. Four weeks biofilms were treated with drug-contained gels to determine the antimicrobial effect on biofilm-resident E.faecalis, and the integrity of E.faecalis and its biofilms were observed by FE-SEM. CCK-8 assays was used to test the cytotoxicity of CPC and Ag+ combinations on MC3T3-E1 cells.Results The results confirmed the synergistic antibacterial effect of low-dose CPC and Ag+ against both planktonic and 4-week biofilm E. faecalis. After the addition of CPC, the sensitivity of both planktonic and biofilm-resident E. faecalis to Ag+ improved, and the combination showed good biocompatibility on MC3T3-E1 cells.Conclusion sLow-dose CPC enhanced the antibacterial ability of Ag+ against both planktonic and biofilm E.faecalis with good biocompatibility. It may be developed into a novel and potent antibacterial agent against E.faecalis, with low toxicity for root canal disinfection or other related medical applications.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 29
·73534-73547
·
IF 5.8
Lin Sudan,Xu Yongzhi,Fu Chen,Zhang Haifeng,Kong Qiaoping,He Haoran,Liu Siyuan,Shi Xueqing,Zhao Dandan
Recently, selective phosphorus removal from aqueous solution has been a highly desirable strategy to combat eutrophication due to the increasingly stringent phosphorous emission standards. However, conventional adsorbents pose the limitations in phosphate removal suffering from lack of selectivity and stability under complicated condition and poor separation. In this study, novel Y 2 O 3 based calcium-alginate (Y 2 O 3 /SA) beads of feasible stability and highly selectivity towards phosphate by encapsulating Y 2 O 3 nanoparticles inside calcium-alginate beads via Ca 2+ controlled gelation process was synthesized and characterized. The phosphate adsorption performance and mechanism were investigated. In general, a high selectivity among co-existing anions was found with co-existing anion concentration up to 62.5 times of the phosphate concentration. Additionally, phosphate adsorption by Y 2 O 3 /SA beads exhibited stable performance over a wide pH range between 2 and 10, while reaching the maximum adsorption capacity at pH 3 (48.54 mg-P/g). The value of point of zero charge (pH pzc ) of Y 2 O 3 /SA beads was approximately 3.45. Pseudo-second-order and Freundlich isotherm models can well accord with kinetics and isotherms data. The FTIR and XPS characterizations analyzed that inner-sphere complexes were proposed to be the major contributor of Y 2 O 3 /SA beads for phosphate removal. In conclusion, Y 2 O 3 /SA beads as the mesoporous material exhibited excellent stability and selectivity towards phosphate removal.
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JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 6
·1-13
·
IF 2.8
Su Hao,Yang Jin
Using 3-aminopropyltriethoxysilane (KH550), γ-glycidyloxypropyltrimethoxysilane (KH560) and silica with different particle sizes as raw materials, the grafting reaction through layer-by-layer assembly strawberry-like silica particles with multi-scale effects were prepared, and their structures were characterized by infrared spectroscopy (FT-IR), hydrogen nuclear magnetic resonance (NMR), X-ray diffraction (XRD), transmission electron microscopy (TEM) and other testing methods. Then it was physically blended with laboratory-made water-based epoxy resin WEP, and the coating with superhydrophobic properties was prepared by the low surface energy modification of methyltrimethoxysilane (MTMS). Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) to characterize the blending stability and heat resistance of the coating, and to analyze its morphological characteristics with scanning electron microscopy (SEM), and to analyze its abrasion resistance by measuring the change in the surface contact angle of the coating under certain conditions, Chemical resistance. The results showed that the prepared strawberry-like silica particles reached the expected structure, and formed Pickering emulsion similar to oil-in-water after blending with WEP, which was a stable emulsion system of solid particles. At the same time, due to the introduction of strawberry-like silica particles and the low surface energy modification of MTMS, the modified WEP has superhydrophobic properties, as well as excellent abrasion resistance, corrosion resistance and self-cleaning effect.
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JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 6
·1-13
·
IF 2.8
Chen Quan,Zhang Pengying,Zhao Bingbing,Zhao Meng,Ni Lingli,Gao Xiaoyan,Hu Guang,Jiang Xiaowu,Ding Shijie
A novel and facile continuous flow photopolymerization of Pickering emulsion procedure to fabricate nanoporous composite microspheres was induced. Palygorskite (PAL) fibers were chosen as stabilizers in oil phase system that containing of Methyl methacrylate (MMA), (ethylene glycol) diacrylate (EGDMA), Irgacure 819 (I 819, photoinitiator) and toluene (porogenic agent). The influence of PAL concentration to the emulsion stabilities and the morphologies of produced microspheres have been fully investigated. It was observed that in the presence of 1.5 wt% PAL fibers, the formed pickering emulsion provided best conditions to obtain polymerized porous microspheres. Furthermore, N 2 adsorption-desorption isotherms characterization revealed a specific BET surface area of 171 m 2 /g of the resultant microspheres, which suggested the great potential applications of such methodology. Suitable polymerization flow rate is one of the other key parameters to result PMMA/PAL composite microspheres. Additionally, the formation mechanism of the microsphere as well as its porosity has been discussed.
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