ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Lian Xia,Yuxia Yang,Hongqin Yang,Yue Tang,Jianli Zhou,Yuangen Wu
There is still a great challenge of on-site and rapid detection for ethyl carbamate (EC) in liquor. Herein, the aptamer (EC1) against EC was firstly screened by Capture-SELEX strategy, and its affinity and binding sites for EC were further investigated by fluorescence assay and molecular docking . Under the premise of retaining the structural features, the obtained aptamer was further truncated into a short sequence (named EC1-34), which has the dissociation constant of 17.97 ± 0.98 nM for EC. Subsequently, a visible, rapid, and cost-effective test strip was firstly designed for EC detection in liquor, in which the cationic polymer was used to efficiently capture the recognition probe conjugated with EC1-34 aptamer and gold nanoparticles (AuNPs). The minimum detection limit of the test strip is calculated as 2.14 μg⋅L -1 . The rapid test strip can be widely used for EC detection in liquor due to the advantages of high stability, convenience and selectivity .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the American Chemical Society
·
2022
·
IF 16.383
Rongjie Yang,Shanshan Liu,Qi Sun,Qiaobo Liao,Kai Xi,Bin Su
Covalent organic framework (COF) membranes with tailored functionalities hold great promise in diverse applications, but the key to realize their full advantages of highly ordered pore structures is the development of membrane fabrication approaches. In this work, we report a potential difference-modulated biphasic strategy to fabricate large-area, self-standing COF membranes under ambient conditions. The fabrication was conducted at the polarized water/1,2-dichloroethane (water/DCE) interface, where HCl was dissolved in water as a catalyst and monomers (both amine and aldehyde) were added to DCE. The external polarization of the water/DCE interface by cyclic voltammetry can continuously pump H+ from water to DCE to boost the Schiff base reaction of monomers and the growth of COF membranes. Moreover, the growth process can be real-time-monitored by interfacial double-layer capacitance measurement, and the permeability of COF membranes can be in situ-examined by heterogeneous ion transfer voltammetry. Given that the potential difference across the water/DCE interface can be also facilely modulated by dissolving proper electrolyte ions in two phases, the fabrication of large-area COF membranes is made possible in beakers. Using this strategy and different monomers, three types of centimeter-scale, free-standing COF membranes with tunable pore size and surface functionality were prepared, and their defect-free structure was proved by the molecular permeance and ultrafiltration test. We believe that this biphasic strategy offers a controllable and scalable way to fabricate COF membranes and sheds light on development of novel self-supporting membranes with unique functions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 36
·23215-23220
·
IF 4.036
Mingxin Luo,Bo Sun,Chen Zhou,Qingqing Pan,Yue Hou,Huan Zhang,Jing Sun,Chenyang Zou
In this research, a novel selective and sensitive fluorescent sensor for detecting Fe3+ was designed and synthesized; it revealed an obvious fluorescence quenching effect upon addition of Fe3+, and possessed the quantitative analysis ability on account of the formation of a 1 : 1 metal–ligand complex. Furthermore, the density functional theory calculations were utilized to study the molecular orbitals as well as the spatial structure. Simultaneously, the cell experiments and zebra fish experiments verified the application value of the sensor in the biological field.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Metals
·
2022
·Vol. 12
·期 5
·871
·
IF 2.695
Cui Wang,Jianliang Zhang,Wen Chen,Xiaolei Li,Kexin Jiao,Zhenping Pang,Zhongyi Wang,Tongsheng Wang,Zhengjian Liu
The corrosion resistance to molten iron of four kinds of carbon bricks used in blast furnace hearth were investigated to elaborate the corrosion mechanism through the macroscopic and microscopic analysis of carbon bricks before and after reaction and thermodynamic analysis. The macroscopic analysis showed that brick A had the lowest degree of corrosion and highest uniformity at different heights, attributing to its moderate carbon content of 76.15%, main phases of C, Al2O3, SiC, and Al6Si2O13(mullite), and lower resistance to molten iron infiltration, etc. The microscopic analysis showed that all the carbon bricks had more and larger pores than the original carbon bricks. The phenomena of the iron beads adhering to carbon brick and iron infiltration were observed between the interface of carbon brick and molten iron. In addition, the obvious corrosion process was presented that the carbon matrix was broken and peeled off during the iron infiltration process. For the carbon brick being corroded, the dissolution of carbon was the predominant reaction. The higher the carbon solubility of the molten iron, the easier the corrosion on the carbon brick. Al2O3and SiC enhanced the corrosion resistance to molten iron of carbon bricks, and SiO2could react with carbon to form pores as channels for the penetration of molten iron and increase the corrosion on carbon bricks. A higher graphitization degree of carbon bricks was beneficial to lessen their corrosion degree. The corrosion on carbon bricks by molten iron could be attributed to three aspects: carburization, infiltration, and scouring of molten iron. The carburization process of molten iron was the main reaction process. The molten iron infiltration into the carbon bricks facilitated the dissolution of carbon and destroyed the structure and accelerated the corrosion of the carbon bricks. The scouring of molten iron subjected the iron–carbon interface to interaction forces, promoting the separation of the exfoliated fragmented carbon brick from the iron–carbon interface to facilitate a new round of corrosion process.Keywords:carbon brick;corrosion resistance to molten iron;carburization;iron infiltration
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 4
·640
·
IF 5.719
Lin Bo,Fujin Li,Yangbo Hou,Min Zuo,Degang Zhao
Forming co-alloying solid solutions has long been considered as an effective strategy for improving thermoelectric performance. Herein, the dense Cu2−x(MnFeNi)xSe (x= 0–0.09) with intrinsically low thermal conductivity was prepared by a melting-ball milling-hot pressing process. The influences of nanostructure and compositional gradient on the microstructure and thermoelectric properties of Cu2Se were evaluated. It was found that the thermal conductivity decreased from 1.54 Wm−1K−1to 0.64 Wm−1K−1at 300 K via the phonon scattering mechanisms caused by atomic disorder and nano defects. The maximumzTvalue for the Cu1.91(MnFeNi)0.09Se sample was 1.08 at 750 K, which was about 27% higher than that of a pristine sample.Keywords:thermoelectric material;nanostructured;interfacial engineering;multi-scale scattering centers
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wensen Liu,Hui Su,Jian Zhang,Lina Wang,Yahui Liu,Jie Liang,Zhaowu Zhu
The hydrometallurgical process for the recovery of nickel and cobalt requires a complex and expensive impurity removal process. Solvent extraction is widely used in industry for the separation, purification, and concentration of metals. However, current commercial extractants encounter some difficulties when cobalt and nickel are extracted from solutions containing a large amount of impurities such as manganese and calcium. There is an urgent need to develop new reagents for the selective extraction of Ni and Co. In this study, N-(2-ethylhexyl)-pyridine-4-carboxamide (NEHPCA) was synthesized, and the metal extraction capacity of its synergistic solvent extraction (SSX) system with dinonylnaphthalene sulfonic acid (DNNSA) and tributyl phosphate (TBP) modifier was examined. The experimental results show that the selectivity of the new SSX system has the order Cu > Ni > Co > Zn > Mn > Ca > Al ≈ Cr (III) ≈ Mg ≈ Fe (III), with excellent selectivity for nickel and cobalt. Using an organic phase composed of 0.7 M NEHPCA, 0.35 M DNNSA, and 0.2 M TBP under 1:1O/A operation, after three-stage theoretical extraction, more than 99% of nickel and cobalt can be recovered from a synthetic leaching solution of nickel laterite ore. Mechanistic studies showed that NEHPCA and water molecules participate in the internal coordination of metals, and DNNSA provided coordination anions to achieve charge balance, forming the Ni complex in this SSX system which existed most likely in the form of [Ni(NEHPCA) 2 (H 2 O) 4 ](DNNS) 2 in the organic phase.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Yanju Chen,Hui Wu,Siwenjie Qian,Xiaoping Yu,Huan Chen,Jian Wu
Heavy metal lead accumulation in the environment pollutes the ecology systems and further threatens the human health. It is necessary to develop a sensitive method to detect it. Here, we propose a highly sensitive lead detection method by combining DNAzyme and CRISPR system. Once the lead ion is recognized, the substrate chain of DNAzyme is cleaved to produce single strand DNA . The produced single strand DNA can be detected by Cas protein/guide RNA complex and further trigger the collateral cleavage effect of CRISPR system, which can indiscriminately cut short single strand DNA reporters. By this way, the detection signals can be greatly amplified. This method can detect lead ions as low as 0.48 nM. The sensitivity is higher than the DNAzyme method. Furthermore, the portable 3D printing device is designed to observe the fluorescent signals so the end-point detection results can be visualized by the naked eyes. The entire detection process can avoid using bulky and expensive instruments, which can promote on-site lead ion detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yaheng Zhang,Chao Fan,Dongdong Ge,Qinggang Zhang,Shouqiang Huang,Guohua Zhang,Jiayu Su
For the detection of anions from wastewater, the perovskite materials synthesized should have suitable stability and be as hydrophilic as possible, and it’s not appropriate to introduce organic ligands. Mechanochemical reaction can avoid the use of organic solvents and provide improved stability for the perovskite materials due to their large particle size and compact structure, but their fluorescence is often too weak. To solve this problem, the Mn 2+ doping effect was introduced into the CsPbCl 3 crystals, and their synthesis doping strategies driven by mechanical grinding were systematic studied. The optimal Mn 2+ -doped CsPbCl 3 (CsPbCl 3 :Mn) product was obtained by optimizing the synthesis conditions of Mn 2+ source, grinding time on each reaction stage, Mn: Pb feeding ratio, and the sintering temperature . CsPbCl 3 :Mn had the same crystal structure as its undoped counterpart, while an obvious photoluminescence emission peak at 604 nm was obtained, which was originated from the doped Mn 2+ ions. CsPbCl 3 :Mn had good stability against the ethanol environment and there was no organic ligands to hinder the ion exchange between Cl - and Br - from wastewater. Through testing the color difference of the resultant powders, a linear relationship with high correlation coefficient above 0.99 was established between chroma and Br - concentrations, and the Br - concentration in wastewater was accurately determined, demonstrating a promising application prospect of CsPbCl 3 :Mn in the fast detection of Br - ions.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Yuxiang Yan,Yuxin Cao,Zhichao Wang,Ka Wang,Hengdong Ren,Shaoqi Zhang,Yi Wang,Jian Chen,Yong Zhou,Lizhe Liu,Jun Dai,Xinglong Wu
Rational design of efficient and robust earth-abundant alkaline hydrogen evolution reaction (HER) catalysts is a key factor for developing energy conversion technologies. Currently, antiperovskite nitride CuNMn 3 has garnered significant interest due to its remarkable properties such as negative/zero thermal expansion and magnetocaloric effects. However, when utilized as hydrogen evolution catalysts, it encounters large challenge resulting from excessively strong/weak interactions with adsorbed H on Mn/Cu active sites, which leads to low HER activity. In this study, we introduce an asymmetric orbital hybridization strategy in Zn-doped Cu 1− x Zn x NMn 3 by leveraging the localization of Zn electronic states to reconfigure the electronic structures of Cu and Mn, thereby reducing the energy barrier for water dissociation and optimizing Cu and Mn active sites for hydrogen adsorption and H 2 production. Electrochemical evaluations reveal that Cu 0.85 Zn 0.15 NMn 3 with x = 0.15 demonstrates exceptional electrocatalytic activity in alkaline electrolytes. A low overpotential of 52 mV at 10 mA cm −2 and outstanding stability over a 150-h test period are achieved, surpassing commercial Pt/C. This research offers a novel strategy for enhancing HER performance by modulating asymmetric hybridization of electron orbitals between multiple metal atoms within a material structure.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2023
·
IF 3.6
Kai Wang,Hengtai Zhang,Jinrong Liang,Zhigang Xu,Shangyu Huang,Jian Peng,Chao Yang,Wenjun Li,Qiang Shen,Chuanbin Wang
Al content is of great importance for the evolution of the microstructure and compressive performance of the high-Mn and high-Al porous steels. Herein, Fe–Mn–Al porous steels with different Al contents are prepared via powder sintering at different temperatures. The results show that the main phases of the sintered samples at 640 °C are α-Fe, α-Mn, and Al, while a small amount of Fe 2 Al 5 and Al 8 Mn 5 exists in the samples with 15 and 20 wt% Al. At 1200 °C, the sintered sample with 5 wt% Al is composed of γ-Fe, while those with 15 and 20 wt% Al are mainly α-Fe. The length of Mn depletion region and porosity of the samples increase with the increase of Al content. The largest total and open porosity are observed in the 1200 °C-sintered sample with 20 wt% Al, which are 63.1 and 60.7 vol%, respectively. The compressive strength decreases sharply from 770 MPa for the sample with 5 wt% Al to 7.5 MPa with 15 wt% Al, after sintering at 1200 °C. Ductile fracture occurs in the sample with 5 wt% Al, while brittle fracture is the main fracture mode in those with 15 and 20 wt% Al.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2023
·
IF 9.1
Yun Wei,Lei Zhou,Wenbin Hu,Liming Yang,Guang Yang,Chaoqiang Wang,Hui Shi,Fei Han,Yufa Feng,Xuan Ding,Penghui Shao,Xubiao Luo
The efficient and environmentally friendly recycling technology of waste residue that including abundant heavy metal produced during the recovery of lithium batteries has become a research hotspot. Herein, a novelty process of acid leaching-selective electrodeposition-deep impurity removal-regeneration was proposed to recovery of the CuS slag, which has been efficient transferred to high purity cathode copper and commercially available ternary precursors. Copper cathode with a purity of 99.67% was prepared under electrochemical reaction conditions at −0.55 V for 2 h. A novel impurity remover-Mn powder, which was used to remove the residual impurities and as a feedstock for the ternary precursor. Finally, NCM523 was regenerated by co-precipitation. The process is superior to the traditional process in economy, energy consumption, CO 2 emissions, product purity and process duration. This study provides a new approach for solid waste recovery and precious metal enrichment.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
Pengcheng Yang,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu
Inorganic chalcogenides capable of exhibiting many interesting functional properties, e.g. nonlinear optics, magnetism , luminescence, catalysis, have attracted considerable attention, yet coupling these properties in one compound to construct a new multifunctional chalcogenide is still rarely reported. Herein, we synthesized a novel noncentrosymmetric metal chalcogenide, NaMn 3 Ga 3 S 8 by the traditional high-temperature solid-state reaction, which can exhibit three interesting functional properties, including nonlinear optical (NLO) response, photoluminescence , and antiferromagnetism simultaneously. The single-crystal X-ray diffraction shows it crystallizes in the hexagonal space group P-6, with unit cell parameters a = 16.787 (8), c = 3.707 (3), Z = 3. In the structure, MnS 6 octahedra form a chain-like configuration that is interconnected with GaS 4 tetrahedra through vertex-, edge-sharing to construct a three-dimensional framework with the Na cations residing in the cavities. Experiments demonstrate that NaMn 3 Ga 3 S 8 shows a large second harmonic generation response at 2.09 μm about 1.6 times that of the benchmark AgGaS 2 with valuable phase-matchable features. Meanwhile, NaMn 3 Ga 3 S 8 can also exhibit antiferromagnetic characteristics with a Néel temperature of 8.6 K and luminescence emissions around 776 nm. Besides, to further analyze the structure−properties relationship, the source of multifunctional properties of the target compound is analyzed by first-principles calculation. These suggest that rational selection of structural components will be a viable approach for designing and discovering novel multifunctional metal chalcogenides .
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）