SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Xuemei Wang,Zhen Zhang,Jing Ru,Pengfei Huang,Yuan Ma,Jie Zhang,Xinzhen Du,Xiaoquan Lu
In view of the serious carcinogenic, teratogenic and mutagenic properties of polycyclic aromatic hydrocarbons (PAHs), which cause significant harm to human beings and the environment. Therefore, developing rapid adsorption and efficient analytical methods are research topic with practical significance. Herein, an innovative MOFs@COFs-based molecular trap materials were prepared with hierarchical porous core–shell structure and used as solid-phase microextraction (SPME) fiber coating, which combined with high performance liquid chromatography (HPLC) to achieve the efficient separation, capture, and detection for 7 PAHs in real samples. The possible adsorption mechanism was systematically verified and explained. Under the optimized conditions, the method developed in this experiment had a wide linear range (0.005–400 µg·L −1 ) with a good linear correlation coefficient (R 2 > 0.9984), low detection limits (0.002–0.405 µg·L −1 , S/N = 3) and low quantification limits (0.005–1.351 µg·L −1 , S/N = 10). The relative standard deviations of individual fibers and different batches of fibers were 0.26–3.64% and 0.40–5.91%, respectively. Besides, the fiber showed higher enrichment capacity and extraction efficiency for PAHs compared to commercial SPME fibers and other material fibers, and exhibited excellent acid-base stability and reproducibility. This work provided a favorable synthetic pathway for the preparation of MOFs@COFs composites by layer-modified assembly synthesis strategy, showed excellent practical applicability as a SPME fiber coating combined with HPLC, and could be realized to provide technical support for future studies on the separation, adsorption, and analysis of PAHs in the petrochemical industrial zone of the Yellow River Basin.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Yang Mei,Si Yang,Chenxi Li,Xinyu Li,Yuewen Yu,Rong Liu,Wenliang Chen,Xiaoli Wang,Kexin Xu
Mercury ion (Hg 2+ ) detection plays a crucial role in safeguarding the environment and protecting human health. In this study, we developed a microfluidic biosensing platform that utilizes a phosphorothioate-RNA (PS-RNA) probe and gold-coated magnetic nanoparticles to quantify Hg 2+ visually. The PS-RNA probe was linked to gold-coated magnetic nanoparticles via Au–S interaction and biotin–avidin interaction and then combined with polystyrene microspheres to form a self-assembled structure called a magnetic bead-AuNP-probe-polystyrene (MAPP) bead. We designed and fabricated a microfluidic chip that contained only a magnetic separator and a particle trap. The presence of Hg 2+ cut the PS-RNA probe, leading to the separation of magnetic beads and polystyrene microspheres. The MAPP was removed by the magnetic separator, while the cut polystyrene microspheres flowed along the channel and accumulated in the particle trap, forming a long visible strip. The length of the polystyrene microsphere strip was proportional to the Hg 2+ concentration. The microfluidic biosensing platform exhibited high sensitivity and specificity for Hg 2+ detection, with a detection limit of 21.9 nM. By integrating the microfluidic magnetic manipulation system with a sensitive nucleic acid probe, we developed an automated and visual biosensor that is a valuable reference for the on-site visual detection of heavy metal ions.
研究领域:
环境科学
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分析化学
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生物技术
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纳米技术
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Fanyue Meng,Zequn Yang,Jianping Yang,Lijian Leng,Wenqi Qu,Peizhong Wen,Jiexia Zhao,Hailong Li
Iron sulfides (FeS x ) characterized by the nonstoichiometric coordination between iron and sulfur are promising sorbents for elemental mercury (Hg 0 ) adsorption from industrial flue gas. However, the unstable nature of FeS x tending to self-combust under ambient conditions impedes its scalable synthesis. To overcome this critical challenge, this work developed a cupric ion incorporation method to stabilize FeS x . When the compositional ratios of cupric ion and FeS x both equaled 50%, the composite sorbent as synthesized (50Cu-FeS x ) exhibited ultra-high Hg 0 adsorption capacity and uptake rate that reached 433.2 mg g −1 and 847.4 μg g −1 min −1 , outperforming those benchmark metal sulfides as reported in previous studies for practical uses. In this sample, the copper ion well-incorporated into the lattice of amorphous FeS x was an indispensable fundamental that contributed to its outstanding performance and hydrophobic ability. The stabilized FeS x thus enriched its surface with abundant under-coordinated sulfur due to the nonstoichiometric coordination environment, which acted as the primary active sites for the conversion of Hg 0 because only under-coordinated sulfur could accept electrons Hg 0 donated. The main product after 50Cu-FeS x adsorbed Hg 0 was HgS, an extremely stable mercury form in nature. From these perspectives, it is proper to declare that this work not only proposed an efficient sorbent holding great potential for Hg 0 removal from high-humidity industrial flue gas but also provided a novel method for the rational design of FeS x -based materials with extensive applicability in the future.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
TALANTA
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2024
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IF 5.6
Weimin Wang,Chuting Xu,Zhe Li,Chaohui Qiu,Fuxing Xu,Chuan-Fan Ding
Photoionization-ion trap mass spectrometry (PI-ITMS) is one of the major directions of mass spectrometer miniaturization because of its great potential for rapid on-site VOCs detection in many cases. Traditionally, PI has always been investigated separately and is restrained by ion transmission structure, so a new structure needs to be designed and investigated for simplifying and improving the ion transmission efficiency. Interestingly, our preliminary experiments found that the signal intensity and mass range can be effectively improved by combing atmospheric pressure photoionization (APPI) and low-pressure photoionization (LPPI). Therefore, in this paper, a new dual photoionization - ion trap mass spectrometry (DPI-ITMS) was developed, explored and used to directly analyze complex VOCs. Compared with traditional single PI configuration, it presents two obvious merits: (1) simplified ion transmission structure, eliminating the need to use deflection electrode to repel ions and avoiding breakdown risk. (2) some missing/weak low m / z ion mass spectral peaks in APPI and some high m / z ion mass spectral peaks in LPPI were improved in DPI detection mode. In addition, by combining multivariate statistical analysis, we preliminary achieved in differentiating fruit types and maturity level. In summary, we concluded that the developed DPI-ITMS has moderate detection sensitivity (limited by the homemade ITMS, 0.1–1 ppmv with RSD of 6.36 %), and the DPI-ITMS configuration can be referenced by future PI-MS, and this study also provides a high-throughput, simple, noninvasive and no chemical contamination solution for analyzing main VOCs in fruit aroma.
研究领域:
分析化学
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食品科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
·Vol. 61
·期 23
·16510-16522
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IF 4.4
Hu Zhenwei,Du Pengcheng,Zhang Yong,Wang Yadong
The uncontrollable growth of lithium (Li) dendrites severely hampers the commercialization of lithium metal batteries (LMBs). Herein, a highly integrated PP/SnO 2 /PP sandwich-structured separator was designed and fabricated. Utilizing an innovative solvent-induced bonding and hot-pressing process, lithiophilic SnO 2 nanoparticles were precisely anchored within a dual-layer polypropylene framework. Morphological and chemical characterizations (SEM, XPS, and EDS) confirmed the uniform distribution and intimate interfacial contact of the modification layer. Electrochemical measurements demonstrated that the sandwich separator enables exceptionally high Coulombic efficiency at a current density of 1 mA cm −2 and imparts superior cycling stability to LFP||Li cells. Mechanistic investigations reveal that the SnO 2 interlayer functions not merely as a physical barrier but, more importantly, as a ‘‘electrochemical trap.’’ Upon contact with the interlayer, Li dendrites trigger an in situ ‘‘micro-cell reaction,’’ which proactively eliminates dendrite tips via electrochemical ablation. This strategic shift from ‘‘passive blocking’’ to ‘‘proactive elimination’’ offers a novel perspective for designing high-safety lithium metal batteries. Graphical abstract Schematic diagram of the mechanism for an electrochemical trapping device used to actively eliminate lithium dendrites. The alternative text for this image may have been generated using AI.
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DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
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IF 4.6
Xingyan Liu,Jinfeng Zhao,Jie Hao,Ying Zhang,Weiyi Cui,Dawei Lou,Xiyue Wang
The solvothermal approach was used to create a three-dimensional covalent organic framework (TP-PA) using p-phenylenediamine (PA), 1,3,5-triformyl phoroglucinol (TP), and anhydrous ethanol as the solvent. It was utilized as a coating material for needle trap devices (NTD) to determine five polychlorinated biphenyls (PCBs) from milk coupled with gas chromatography (GC). The results displayed that TP-PA presented excellent extraction performance to PCBs owing to its abundant micro/mesopores structure, high specific surface area and good chemical and thermal stability. The proposed needle-type micro-extraction (NTME)-GC method had wide linearity (0.025–200 μg L −1 ) with R 2 ≥ 0.9928, low limits of detection (0.0072–0.0146 μg L −1 ), and good single device repeatability and device-to-device reproducibility with the relative standard deviations (RSDs) below 7.07 %. It was applied to detect five trace PCBs in milk, and satisfactory spiked recoveries were obtained (79.7 %∼96.4 %) with relative standard deviations less than 11.9 %. The above results indicated that the method has excellent application potential for detecting PCBs in food.
研究领域:
分析化学
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环境科学
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食品安全
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材料科学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2026
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IF 6.1
Lin Li,Yan Xu,Guanyu Lan,Zhenzhen Yao,Xiaoqin Chen,Mengyu Liu,Hongwei Shi,Xue Li,Xuefei Mao
Background Rapid and sensitive on-site detection of mercury in soil is crucial for environmental monitoring, however, current methods generally involve lengthy and complex sample digestion procedures thereby hindering true field deployment. While portable energy-dispersive X-ray fluorescence spectrometry (ED-XRF) offers field compatibility, which is often limited by insufficient sensitivity and spectral interference. Consequently, an effective pre-concentration method to enhance sensitivity and accuracy for rapid soil Hg analysis remains a significant challenge. Results A rapid field method for soil mercury analysis was developed by coupling a portable ED-XRF with a novel silver nanoparticle sponge trap. The trap was fabricated by functionalizing a melamine sponge with polyethyleneimine and dopamine, followed by in situ reduction of silver nitrate to form a three-dimensional porous structure capable of efficiently capturing gaseous Hg 0 through amalgamation. A major advantage is the clear separation between the characteristic XRF peaks of Ag and Hg, which minimizes spectral interference and ensures accurate quantification. The method achieved a detection limit of 12 ng/g, excellent linearity ( r > 0.996), and recoveries of 86-111%. Without any digestion, the entire analysis can be completed within 10 min, demonstrating strong potential for fast on-site application. Significance This work introduces a digestion-free, field-deployable strategy that overcomes the sensitivity and interference constraints of portable XRF in Hg detection. By integrating a tailored nanomaterial trap, it establishes a rapid and efficient framework for on-site environmental Hg monitoring.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
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2018
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IF 8.097
Wuhui Li,Yixi Zhuang,Peng Zheng,Tian-Liang Zhou,Jian Xu,Jumpei Ueda,Setsuhisa Tanabe,Le Wang,Rong-Jun Xie
Deep-trap persistent luminescent materials, due to their exceptional ability of energy storage and controllable photon release under external stimulation, have attracted considerable attention in the field of optical information storage. Currently, the lack of suitable materials is still the bottleneck that restrains their practical applications. Herein, we successfully synthesized a series of deep-trap persistent luminescent materials Y3Al5–xGaxO12:Ce3+,V3+ (x = 0–3) with a garnet structure and developed novel phosphor-in-glass (PiG) films containing these phosphors. The synthesized PiG films exhibited sufficiently deep traps, narrow trap depth distributions, high trap density, high quantum efficiency, and excellent chemical stability, which solved the problem of chemical stability at high temperatures in the reported phosphor-in-silicone films. Moreover, the trap depth in the phosphors and PiG films could be tailored from 1.2 to 1.6 eV, thanks to the bandgap engineering effect, and the emission color was simultaneously changed from green to yellow due to the variation of crystal field strength. Image information was recorded on the PiG films by using a 450 nm blue-light laser in a laser direct writing mode and the recorded information was retrieved under high-temperature thermal stimulation or photostimulation. The Y3Al5–xGaxO12:Ce3+,V3+ PiG films as presented in this work are very promising in the applications of multidimensional and rewritable optical information storage.
研究领域:
材料科学
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光学工程
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DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2017
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IF 6.32
Zhengyi Chen,Gongke Li,Zhuomin Zhang
It still remains a great challenge for quantification of trace analytes in complex samples by surface-enhanced Raman scattering (SERS) technique due to potential matrix influence or weak SERS responses of analytes. In this work, a miniaturized thermal-assisted purge-and-trap (MTAPT) device was designed and developed to eliminate matrix influence coupled with derivatization method before SERS analysis. The design of MTAPT chamber was optimized based on quantitative calculation of its dead volume by computational fluid dynamics simulation. The small straight chamber was selected as an optimized design with a recovery of 96.1% for formaldehyde. The practical feasibility of MTAPT was validated based on four real analytical applications including phenthiol in industrial water, formaldehyde in flour, sulfion in wastewater, and methanol in industrial alcohol. The results showed that SERS responses of all analytes dramatically increased by eliminating sample matrices after MTAPT process. Phenthiol, formaldehyde, sulfion, and methanol in real samples could be accurately quantified with recoveries of 80.9–110.0%, and the analytical results were validated by corresponding standard methods. The time consumption of MTAPT-SERS for real sample analysis including sample preparation and determination was within 16 min. It is highly expected that the combination of MTAPT technique with portable SERS instrument can greatly expand the range of SERS analysis. The proposed MTAPT-SERS method has high potential for on-site analysis of complex samples.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF MASS SPECTROMETRY
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2018
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IF 1
Gang Li,Detian Li,Yongjun Cheng,Wenjun Sun,Xiaoqiang Pei,Xiaodong Han,Huzhong Zhang,Yongjun Wang,Jian Sun,Meng Dong
A miniaturized linear ion trap mass spectrometer with continuous atmospheric pressure interface has been built in our lab. Significant extension in mass range and reduction in power consumption have been realized by the supplemental alternating current frequency scan mode. However, relatively poor sensitivity has been witnessed, which is directly dominated by the detection efficiency of the ion detector. Theoretical analysis has been implemented to find ways to improve the detection efficiency. The results show that enhanced sensitivity can be obtained by applying a direct current voltage on the pair of electrodes in eject direction. Experiments show that the sensitivity has been improved by more than one time due to the application of direct current voltage. With this design, this homemade miniature linear ion trap mass spectrometer can be used to analyze more rarefied samples, especially to on-site chemical analysis and space application.
研究领域:
分析化学
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质谱技术
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DOI
PubMed
高影响因子
JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH
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2015
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IF 0.913
Xing-Long Chen,Chang-An Geng,Ji-Jun Chen
High-resolution electrospray ionization ion-trap time-of-flight tandem mass spectrometry (HR-ESI-IT-TOF-MSn) in positive-ion mode was used to determine the accurate masses and fragmentation pathways of four C19-diterpenoid alkaloids, aconitine (1), yunnaconitine (2), crassicauline A (3), and benzoylmesaconine (4). The [M+H]+ ions of compounds 1–4 were readily observed in conventional single-stage mass spectrometry. Based on the MS1–6 analyses, detailed fragmentation rules of the four compounds were proposed. The neutral losses of AcOH, MeOH, H2O, CO, C2H4, PhCOOH and p-OMePhCOOH segments were the characteristic eliminations from the precursor ions due to the presence of acetyl, methoxyl, hydroxyl, N-ethyl, benzoyl and p-methoxyl-benzoyl units in the structures. Benefited from the high resolution of the mass analyzer, the loss of 28 Da corresponding to CO or CH4 segment in product ions was unambiguously distinguished. The losing sequence of the main substituent groups was summarized as: C(8)-acetyl>C(16)-methotyl>C(15)-hydroxyl>C(6)-methoxyl>C(1)-methoxyl/C(3)-hydroxyl>C(18)-methoxyl>>C(13)-hydroxyl. The sequential loss of (16)-methoxyl moiety and CO (generating from enol–ketone tautomerism) groups could be recognized as the characteristic eliminations for the compounds with C(16)-methoxyl and C(15)-hydroxyl groups simultaneously. The application of HR-ESI-IT-TOF-MSn technique to investigate the fragmentation of C19-diterpenoid alkaloids provided useful information to understand their fragmentation behaviors.
研究领域:
植物化学
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分析化学
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DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 14
·2207955
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IF 29.4
Yong Wang,Tong Li,Libo Li,Rui-Biao Lin,Xiaoxia Jia,Zeyu Chang,Hui-Min Wen,Xiao-Ming Chen,Jinping Li
Propane/propene (C 3 H 8 /C 3 H 6 ) separation is essential in the petrochemical industry but challenging because of their similar physical and chemical properties. Adsorptive separation with C 3 H 8 -selective porous materials can energy-efficiently produce high-purity C 3 H 6 , which is highly promising for replacing conventional cryogenic distillation but suffers from unsatisfactory performance. Herein, through the precise incorporation of fluorinated functional groups into the confined pore space, a new fluorinated metal–organic framework (FDMOF-2) featuring the unique and strong C 3 H 8 -trap is successfully constructed. FDMOF-2 exhibits an unprecedented C 3 H 8 capture capacity of 140 cm 3 cm −3 and excellent C 3 H 8 /C 3 H 6 (1:1, v/v) selectivity up to 2.18 (298 K and 1 bar), thus setting new benchmarks for all reported porous materials. Single-crystal X-ray diffraction studies reveal that the tailored pore confinement in FDMOF-2 provides stronger and multiple attractive interactions with C 3 H 8 , enabling excellent binding affinities. Breakthrough experiments demonstrate that C 3 H 8 can be directly extracted from various C 3 H 8 /C 3 H 6 mixtures with FDMOF-2, affording an outstanding C 3 H 6 production (501 mmol L −1 ) with over 99.99% purity. Benefiting from the robust framework and hydrophobic ligands, the separation performance of FDMOF-2 can be well maintained even under 70% relative humidity conditions.
研究领域:
材料科学
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化学工程
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产品关联
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PubMed
高影响因子
危险品化学品经营许可证（带存储）