APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jun Cong,Shao-hua Luo,Peng-yu Li,Xin Yan,Li-xiong Qian,Sheng-xue Yan
Na 3 V 2 (PO 4 ) 3 (NVP) has become a hot material in the research field of sodium-ion batteries (SIBs) as a result of its unique structural advantages. Unfortunately, the poor electronic conductivity and ion diffusion ability fundamentally limit the practical development of NVP. Considering the above defects, a series of Li + doped Na 3−x Li x V 2 (PO 4 ) 3 /C cathode materials for SIBs are synthesized through hydrothermal assisted sol–gel method. The cell volume steadily decline with the raise of Li + doping amount, which is consistent with the usual doping effect. Moreover, with the increase of lithium doping amount, Li + preferentially occupies Na (2) site and then occupies Na (1) site. Through the first principles calculation, it is clear that the introduction of Li + can significantly reinforce the conductivity of the material system and diminish the electron localization phenomenon. The analysis of (1 1 6) crystal plane by TEM shows that Li doping will reduce the interplanar spacing. The change of V valence during the charge–discharge process of Na 2.8 Li 0.2 V 2 (PO 4 ) 3 /C is consistent with that of NVP by V element XANES characterization. There is no conventional phase transition phenomenon in the ex-situ XRD high-voltage charging state. The above facts indicate that lithium doping obtains a stable solid solution NVP. The electrochemical test results show that Na 2.8 Li 0.2 V 2 (PO 4 ) 3 /C can provide an amazing reversible capacity of 116.9 mAh/g (theoretical capacity of 117 mAh/g) and capacity retention rate of 99.82 % after 500 cycles. GITT results show that Li + can significantly increase the Na + diffusion coefficient of the material. Such excellent electrochemical performance is attributed to the fact that the doping of Li + activates the activity of Na + in Na (2) site and improves the reaction efficiency.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
·
IF 4.3
Guona Li,Qingya Yang,Xiaoying Liu,Lvcheng Liu,Junshan Han,Xing Li
A very poisonous heavy metal Cd 2+ not only contaminates the living environment but also constitutes a serious menace to human health through water intake and food chains. Thus, monitoring and controlling the content of Cd 2+ with rapidity, sensitivity, and simplicity in tap water, soil, and rice samples is important especially. In the work, a high-efficiency sensor based on gold nanoparticles (AuNPs) embellished and refined with 3-(1H-Tetrazol-5-yl) aniline (TAA) for the colorimetric detection of Cd 2+ is rationally put forward. The interaction between Cd 2+ and TAA@AuNPs leads to the agglomeration of the AuNPs solutions, resulting in the color of the system changing from wine-red to gray-blue. The limit of detection (LOD) of the sensor is 1.0 μM when observe with the unaided eye, and UV–vis spectroscopy also has a LOD of 31 nM with an excellent linear relationship ( R 2 = 0.99049) in the concentration range of 0.0–8.0 μM for Cd 2+ , indicating that AuNPs modified with TAA can be effectively used for the quantitative determination of Cd 2+ . Furthermore, the colorimetric sensor has been tested on tap water, soil, and rice samples, and it shows promising potential for the practical monitoring of harmful Cd 2+ in environmental systems.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Naymul Karim,Shiyu Liu,Ahmed K. Rashwan,Jiahong Xie,Jianling Mo,Ahmed I. Osman,David W. Rooney,Wei Chen
Anthocyanins are potential bioactive compounds with less bioavailability due to instability in physicochemical and physiological harsh environments. This study synthesized a “nanolipo-fibersomes (NLFS)” using Lipoid® S75 and Nutriose® FB 06 (dextrinization of wheat starch) through a self-assembly technique with probe sonication. We aimed to encapsulate delphinidin- 3-O -sambubioside (D3S) successfully and evaluate physicochemical and controlled release properties with improved antioxidant activity on palmitic acid (PA)-induced colonic cells (Caco-2 cells). D3S-loaded nanolipo-fibersomes (D3S-NLFS) were nanosized ( < 150 nm), spherical shaped, and homogenously dispersed in solution with promising encapsulation efficiency (~ 89.31 to 97.31 %). Particles formation was further verified by FTIR. NLFS were well-stable in thermal, storage, and gastrointestinal mimic environments. NLFS exhibited better-controlled release and mucoadhesive properties compared to nanoliposomes (NL). The NLFS showed better cellular uptake than NL, which was correlated to higher mucoadhesive properties. Furthermore, D3S-NLFS exhibited promising protective effects against PA-induced cytotoxicity, O 2 •− radicals generation, mitochondrial dysfunctions, and GSH depletion, while the free D3S was ineffective. Among D3S-loaded nanoparticles, D3S-NLFS 3 was the most efficient nanocarrier followed by D3S-NLFS 2, D3S-NLFS 1, and D3S-NL, respectively. The above data suggest that nanolipo-fibersomes can be considered as promising nanovesicles for improving colonic delivery of hydrophilic compounds with controlled release properties and greater antioxidant activity.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Peiyao Wang,Silan Bai,Chen Chen,Yongtao You,Junhui Xiao,Xinrong Guo,Lishi Wang
Rose Bengal (RB) is used as a sensitizer in ambient water due to its property of catalyzing the production of singlet oxygen ( 1 O 2 ). However, this property also brings phototoxicity and carcinogenicity. The NaYF 4 :3%Er@NaYF 4 core-shell upconversion nanoparticles (UCNPs) with higher upconversion efficiency was synthesized to detect RB in ambient water. Due to fluorescence resonance energy transfer (FRET) between RB and UCNPs, the upconversion fluorescence at 538 nm emitted by UCNPs was quenched by the RB, while the emission at 566 nm of RB raised. In the best conditions, the ratiometric emission intensity F 566 /F 538 was positively proportional to RB concentration and the linear range was 0.04–15.0 μg·mL −1 (R 2 = 0.996). The detection limit (S/N = 3) of RB was 2.46 ng·mL −1 . The recoveries ranged from 99.0% to 105.6% (relative standard deviation 0.97–3.24%, n = 3) in tap water and 100.3%–104.9% (relative standard deviation 0.66–1.94%, n = 3) in lake water. This proposed method exhibits lower detection limit and larger linear, which possesses practical application value to the detection of RB in water.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Jiepeng Chen,Yun Huang,Jiapin liu,Chengwei Li,He Zheng,Xi Xu,Lei Fu,Xing Li,Mingshan Wang,Yuanhua Lin,Haijun Cao
The sodium super ion conductor (NASICON) structure materials have attracted extensive attention because of its open three-dimensional crystal network framework and fast sodium ion migration rate. However, the poor electronic conductivity due to the presence of phosphate groups and the consequent high cost have been a barrier to commercialization. In this work, Na 4 MnV(PO 4 ) 3 (NMVP) with three-dimensional porous structure is synthesized in situ using Aspergillus niger as a biological template (noted as NMVP/ANDC). The cell wall of Aspergillus niger is rich in hydroxyl groups , which can adsorb metal ions well, so that NMVP particles can be synthesized on Aspergillus niger without stacking and agglomeration. NMVP grows along Aspergillus niger mycelium has a spongy-like three-dimensional porous network structure, which helps the contact between active materials and electrolyte, reduces the migration distance of sodium ions, and improves the conductivity of active materials. Therefore, NMVP/ANDC has good rate performance and cycle stability. It can provide 109 mAh g −1 at 0.5 C and 79.6% capacity retention after 3000 cycles at 5 C. The biological template method is proposed in this paper opens up a simple way for the preparation of other three-dimensional porous network structural materials.
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ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Chunfang Wang,Yun Tang,Bihong Zhang,Ziying Zhong,Faqiong Zhao,Baizhao Zeng
In this study, PO 4 3− doped Bi 2 WO 6 (BWO-PO) was prepared by hydrothermal method , and then copolymer of thiophene and thiophene-3-acetic acid (P(Th-T3A)) was chemically deposited on the BWO-PO surface. The introduction of PO 4 3− created point defects , greatly improving the photoelectric catalytic performance of Bi 2 WO 6 ; the copolymer semiconductor could form heterojunction with Bi 2 WO 6 to promote the separation of photo-generated carriers, due to its proper band gap. Furthermore, the copolymer could enhance the light absorption ability and photo-electronic conversion efficiency. Hence, the composite had good photoelectrochemical properties. When it was combined with carcinoembryonic antibody through the interaction of –COOH groups of the copolymer and the end groups of antibody for constructing ITO-based PEC immunosensor, the resulting sensor exhibited superb response to carcinoembryonic antigen (CEA), with a wide linear range of 1 pg/mL−20 ng/mL, and a relatively low detection limit of 0.41 pg/mL. It also showed high anti-interference ability, stability, and simplicity. The sensor has been successfully applied to monitor the concentration of CEA in serum. The sensing strategy can also be applied to the detection of other markers by changing the recognition elements, hence it has good application potential.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 10
·1-12
·
IF 2.8
Zhao Jiaqi,Hu Chen,Fang Jiapeng,Sun Ruyi,Lu Jingyao,Su Shikun,Lei Zonghao,Fang Pengfei,Feng He,Degao Zhong,Teng Bing
In this work, a series of iso-structural eulyite-type Ba 3 Yb(PO 4 ) 3 :Tb 3+ solid solution phosphors were synthesized via high-temperature solid-phase method. The corresponding unit cell structure, luminescence properties, thermal stability, and chromaticity coordinates of the as-obtained phosphors were systematically investigated. The crystal structure of Ba 3 Yb(PO 4 ) 3 :Tb 3+ was refined by GSAS program, which indicates the oxygen ions in Ba 3 Yb(PO 4 ) 3 are disordered at one C3 site, and the oxygen atoms are distributed at two sites. Under 378 nm ultraviolet excitation, the emission peak of Ba 3 Yb(PO 4 ) 3 :Tb 3+ appears in the range of 450–650 nm, and a characteristic green emission peak appears at 542 nm. Moreover, the luminous intensity of the Ba 3 Yb(PO 4 ) 3 :14 at.% Tb 3+ sample at 160 °C is 87.7% at room temperature, and the quantum yield is 55.8%, which reveals good thermal stability. Our results suggest that the Ba 3 Yb(PO 4 ) 3 :Tb 3+ phosphors are promising high-efficiency green light conversion materials for UV-LED applications.
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BIODEGRADATION
·
2023
·Vol. 34
·期 4
·371-381
·
IF 3.6
Yue Caixu,Jia Nan,Lv Xueru,Wang Shenghui
3, 5, 6-Trichloro-2-pyridinol (TCP) is a metabolite of the insecticide chlorpyrifos and the herbicide triclopyr, and it is higher toxic than the parent compounds. Microbially-mediated mineralization appears to be the primary degradative pathway and the important biological process of detoxification. However, little information is available on TCP complete metabolic pathways and mechanisms. In this study, the degradation of TCP was studied with a novel strain Micrococcus luteus ML isolated from a stable TCP degrading microbiota. Strain ML was capable of degrading 61.6% of TCP (50 mg/L) and 35.4% of chlorpyrifos (50 mg/L) at 24 h and 48 h under the optimal conditions (temperature: 35 °C; pH: 7.0), respectively. It could also degrade 3, 5-dichloro-2-pyridone, 6-chloropyridin-2-ol, 2-hydroxypyridine and phoxim when provided as sole carbon and energy sources. Seven TCP intermediate metabolites were detected in strain ML and two possible degradation pathways of TCP were proposed on the basis of LC–MS analysis. Both the hydrolytic-oxidative dechlorination pathway and the denitrification pathway might be involved in TCP biodegradation by strain ML. To the best of our knowledge, this is the first report on two different pathways responsible for TCP degradation in one strain, and this finding also provides novel information for studying the metabolic mechanism of TCP in pure culture.
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Nanoscale
·
2019
·Vol. 11
·期 21
·10247-10256
·
IF 6.97
Xiaodong Cao,Xueting Zhu,Shudong He,Xuan Xu,Yongkang Ye,Sundaram Gunasekaran
Three-dimensional (3D) networked nanomaterials have attracted great interest because of their unique porous and 3D-networked structures. In this work, a series of gold nanoparticle (AuNP) doped graphene hydrogel nanocomposites (AuNP-GHs) were synthesized through hydrothermal reaction under various conditions. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize the AuNP-GH. The AuNP-GH was used to modify the glassy carbon electrode (GCE) for the detection of indole-3-acetic acid (IAA) and salicylic acid (SA) using chronoamperometric measurements. Under optimum conditions, the AuNP-GH/GCE exhibited linear response to IAA in the ranges of 0.8–4 μM and 4–128 μM, and to SA in the ranges of 0.8–8.4 μM and 8.4–188.4 μM. The detection limits (S/N = 3) were calculated to be 0.21 μM for IAA and 0.22 μM for SA. The proposed sensor showed good sensitivity and stability and hence it was applied in the detection of IAA and SA in spiked samples with satisfactory results.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Xing Cui,Hai Zhu,Chao-Hong He,Ke-Jun Wu
The thermal conductivities of 1-butyl-3-methylimidazolium l-tryptophan ([BMIM][l-trp]), water, ethanol, [BMIM][l-trp] + water, [BMIM][l-trp] + ethanol, water + ethanol, and [BMIM][l-trp] + water + ethanol were investigated from 283.15 to 333.15 K covering the whole scale of concentration at atmospheric pressure with the transient hot wire method. The thermal conductivities of pure [BMIM][l-trp] decease linearly from 0.180 to 0.177 W·m–1·K–1 with increasing temperature. The uncertainty of the measurement was less than 2% at the 0.95 confidence level. The experimental data of binary and ternary mixtures were correlated by a second-order Scheffé polynomial as a function of composition and temperature. The average relative deviation of the calculated values with experimental data was 0.58%.
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CHEMICAL RESEARCH IN TOXICOLOGY
·
2018
·
IF 3.432
Xiaomin Xia,Bin Lu,Wenjing Dong,Bingwei Yang,Yawen Wang,Qi Qin,Zixuan Liu,Erqun Song,Yang Song
Our previous study showed that tetrachlorobenzoquinone (TCBQ) mediated the activation of Nod-like receptor protein 3 (NLRP3) inflammasome, which involves K+ efflux, reactive oxygen species (ROS) production, and mitochondrial DNA damage. In addition, TCBQ down-regulates NLRP3 ubiquitination and promotes the activation of NLRP3 inflammasome. However, the induction of NLRP3 inflammasome by atypical pathways has not yet been characterized. Using human umbilical vein endothelial cells (HUVEC), we discovered that TCBQ activates caspase 1/4/5 and cleaves gasdermin D (GSDMD) into N-terminal and C-terminal cleavage products. In parallel, TCBQ also activates receptor interacting protein kinase 3 (RIPK3)/mixed lineage kinase domain-like protein (MLKL) signaling pathways. The N-terminal fragments of GSDMD and MLKL translocate from cytoplasm to cell membrane and form oligomers and membrane pores on the cell membrane. The formation of membrane pores not only promotes the extracellular secretion of interleukin 1 beta (IL-1β) but also affects cellular ion homeostasis, in particular promotes K+ outflow, which further activates NLRP3 inflammasome and aggravates cellular inflammation. These results indicated that GSDMD and MLKL play important roles in TCBQ-induced endothelial pro-inflammatory responses, which may point to potential therapeutic approaches for TCBQ-mediated toxicity.
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JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Xian Wang,Ziyi Zhu,Lulu Chai,Junyang Ding,Li Zhong,Anrui Dong,Ting-Ting Li,Yue Hu,Jinjie Qian,Shaoming Huang
2-dimensional Co nanoparticles embedded in N-doped carbon nanosheets ( NCNS ) are derived from indium-based frameworks which are impregnated with discrete [Co(NH 3 ) 6 ] 3+ ions by high-temperature pyrolysis as a new approach to convert a 3-dimensional porous metal-organic frameworks ( CPM-5 ) to 2-dimensional functional nanosheets. The as-made porous Co, N-doped carbon nanosheets ( NCNS–Co 0.5 In 0.5 ) perform the excellent ORR catalytic activity with a half wave potential of 0.82 V in comparison with the commercial Pt/C. Meanwhile, it also owns good stability and methanol tolerance as a suitable catalyst for zinc-air batteries with a high power density of 132.2 mW cm −2 . This method can easily be extended to other In-based MOFs, including QMOF-2, In-MIL-68, InOF-1 , in which all the corresponding derived materials exhibit efficient ORR performance. Especially, the porous Co, N-doped carbon nanosheets annealed from InOF-1 ( InOF-1-Co-800 ) display an E onset of 0.93 V, a half-wave potential of 0.85V, and a diffusion-limited current of 5.40 mA cm −2 density. Our work provides a new path to tune the morphology and catalytic performance of MOF derivatives.
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