MICROCHIMICA ACTA
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2025
·Vol. 192
·期 7
·1-12
·
IF 5.3
Aham Emmanuel Chigozie,Ravikumar A.,Feng Weiwei,Arunjegan A.,Hu Zhang,Zhang Zhen,Zhao Hongjun
A bifunctional fluorescent and colorimetric sensor based on UiO-66-NH₂@RhB was developed for the highly sensitive detection of perfluorooctanesulfonate (PFOS), a persistent environmental pollutant. The sensing mechanism relies on the inner filter effect (IFE), where Rhodamine B (RhB) modulates the fluorescence of UiO-66-NH₂, enabling effective PFOS recognition. In the presence of PFOS, UiO-66-NH 2 @RhB exhibits dual emissions in blue fluorescence at 448 nm and red fluorescence at 565 nm at a single excitation wavelength. Upon the addition of increasing concentrations of PFOS, the blue fluorescence intensity increased and a small change was observed in the red fluorescence intensity. Besides, UiO-66-NH 2 @RhB solutions display an excellent colorimetric response for PFOS and produce an obvious color change from red to colorless. The method demonstrated high sensitivity, achieving linear detection ranges of 1–10 nM with detection limits of 0.84 nM (fluorescence) and 0.91 nM (colorimetry). Furthermore, the dual-sensing platform successfully detected PFOS in real water samples with satisfactory outcomes. Its integration with a portable smartphone further enables intelligent, real-time, on-site monitoring and is successfully applied to monitoring PFOS in environmental samples. This study not only broadens the application of MOFs but also provides valuable insights for designing multifunctional sensors for diverse analytical applications. Graphical abstract
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Lei Li,Hengji Liu,Yuanyuan Wang,Gang Wang,Yongde Guo,Weimin Kang
Reasonable construction of low migration energy barrier and continuous proton transfer channel is the key to improving the performance of composite proton exchange membranes. In this paper, we prepared a novel bimetallic MOFs (MIL-(Cr Al)–NH 2 ) nanofibers (MCANs) consisting of Cr and Al elements by electro-blown spinning method (EBS) and hydrothermal synthesis, and subsequently introduced them into non-fluorinated sulfonic acid polymer sulfonated polysulfone (SPSF) matrix to obtain composite proton exchange membranes (MCANs@SPSF). Importantly, MCANs successfully constructed relatively long-range continuous unsaturated metal site proton transfer channels provided by the Cr-based MOFs, thereby reducing the proton migration energy barrier in the MCANs@SPSF, which confirmed by the density functional theory (DFT) calculation. In detail, DFT studies indicated that the migration energy barrier between H + and MCANs was 1.677 eV, while that of single Al-based MOF (MAN) and single Cr-based MOF (MCN) were 1.879 eV and 1.762 eV respectively. The existence of efficient low migration energy barrier and continuous proton transfer channels made the proton conduction efficiency of MCANs@SPSF greatly improved, that was under the condition of 80 °C and 100 % RH, the proton conductivity of MCANs@SPSF reached the maximum value of 0.358 S cm −1 and the power density reached 104 mW cm −2 . Moreover, MCANs@SPSF-5 displayed best DMFC durability performance with only 14.65 % voltage loss under 24h test. In addition, due to the acid-base pair interaction between MCANs and SPSF enhanced the interface binding force between the two phases, meanwhile, the pore structure of MOFs also had a certain adsorption effect on methanol, thus reducing the methanol permeability, and the addition of 5 wt% MCANs in SPSF was tested to reduce the methanol permeability to 5.53 × 10 -7 cm 2 s −1 . Overall, this work provided a new strategy for construction of low migration energy barrier and continuous proton transfer channels, which was beneficial for the development of high performance proton exchange membranes.
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POLYMER COMPOSITES
·
2024
·
IF 4.8
Xinyi Jing,Linggong Meng,Tong Liu,Xinming Ye,Shuai Yang,Zhichao He,Wensheng Wang,Jie Li,Yingchun Li
Achieving high thermal conductivity in composites with low filler content is a major challenge in current research. In this paper, polypropylene (PP) and polyamide 6 (PA6) were used as polymer matrix, and the hybrid thermal conductive filler, formed by hexagonal boron nitride (h-BN) and aminated carbon nanotubes (NH 2 -CNTs), was integrated into matrix for the fabrication of thermal conductive composites (PP/PA6/h-BN and PP/PA6/h-BN@CNTs) via two-step melt blending technology. The thermal conductive fillers were selectively distributed in a phase of the polymer matrix with a co-continuous structure, forming a thermal conductive path with a three-dimensional network structure. The results show that when the content of h-BN reaches 25 wt%, the thermal conductivity of the PP/PA6/h-BN and PP/PA6/h-BN@CNTs composites was 199% and 300% higher than that of PP/PA6, respectively. Through testing the volume resistivity of the composites, it was confirmed that PP/PA6/h-BN@CNTs composites maintain good electrical insulation. Both composites demonstrated remarkable thermal conductivity and outstanding electrical insulation. This research provides a facile way to prepare highly thermal conductivity polymer composites with excellent processing performances and electrical insulation. Highlights h-BN@CNTs hybrid fillers with sandwich structure were prepared. A two-step blending method was used to control the selective distribution of hybrid fillers in a phase of the polymer matrix with a co-continuous structure. The hybrid filler formed a thermal conductive path with a three-dimensional network structure in the collective. PP/PA6/h-BN@CNTs composites demonstrated remarkable thermal conductivity, outstanding electrical insulation and favorable processing performances.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Hongbo Li,Hao Wang,Meiyi Cao,Xing Tong,Shuo Wang,Mingfei Pan
The fluoroquinolone-enrofloxacin (ENR) residue in animal-derived foods poses a significant threat to human health, thereby necessitating developing precise, efficient, and user-friendly detection methods. This study developed a dual-mode fluorescence-colorimetric immunosensing platform using the composite of bimetallic nanoparticles integrated with metal-organic frameworks (Au/Pt NPs@NH 2 -MIL-53(Al)). The Au/Pt NPs with biocompatibility and peroxidase-like activity were modified onto fluorescent NH 2 -MIL-53(Al) and conjugated with Ab 2 to construct signal probes. The platform enables dual-mode quantitative analysis through the competitive binding of ENR and ENR-BSA conjugate to signal probes. It demonstrated a wider linear range (0.08–180 ng/mL) and high sensitivity [LOD: 0.068 ng/mL (fluorescence), 0.066 ng/mL (colorimetric), and 0.074 ng/mL (smartphone-assisted color recognition)]. In real sample analyses, the recoveries ranged from 86.7 % to 106.7 %, with satisfactory stability (RSD ≤ 4.4 %, n = 3). The dual-signal mode facilitates results self-calibration, enhancing reliability, while smartphone-assisted color recognition enables on-site, convenient screening, offering great potential for ENR detection in complex food matrices.
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CHEMOSPHERE
·
2025
·
IF 8.1
Si-yuan He,Wei Wen,Peng Wu,Zhe Meng
Developing a green and efficient technology for decomposing aflatoxin B 1 (AFB 1 ) and ochratoxin A (OTA) in grains has important theoretical value and application prospects for ensuring food safety. A dual Z-scheme ternary heterojunction photocatalyst, Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ /BiVO 4 /NH 2 -UiO-66 (SBN), was prepared via a self-assembling hydrothermal approach. The SBN heterojunction photocatalyst exhibits round-the-clock photocatalytic activity due to the intrinsic light source of Sr 2 MgSi 2 O 7 : Eu 2+ , Dy 3+ (SMS). Dual Z-scheme mechanism was proposed and validated through detailed analysis of quenching experiments, ESR spectra, band arrangement, and charge transfer processes. The dual Z-scheme mechanism not only promotes the effective transfer and separation of photo generated charge carriers during charge carrier transport, but also maintains significant reduction and oxidation potentials. SBN photocatalyst exhibits stable and persistent photocatalytic performance, significantly enhancing the degradation efficiency of AFB 1 and OTA under all-weather conditions. Experimental data shows that the removal rate of AFB 1 increased from 69.60 % after 60 min of illumination to 83.9 % after 4 h of turning off the light source; At the same time, the removal rate of OTA increased from 64.8 % to 78.1 %. •O 2 − and •OH were identified as key active species in photocatalytic reactions. Based on the analysis of AFB 1 and OTA degradation intermediates and the prediction of degradation sites using density functional theory (DFT), degradation pathways for AFB 1 and OTA were proposed. Collectively, these findings suggest a highly promising practical approach for the detoxification of mycotoxins in grain commodities.
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POLYMER ENGINEERING AND SCIENCE
·
2014
·Vol. 55
·期 3
·614-623
·
IF 1.441
Hao Li,Xian-Ming Zhang,Shi-Yang Zhu,Wen-Xing Chen,Lian-Fang Feng
Isocyanate- and amine-functionalized polypropylene (PP) and polystyrene (PS) were prepared through grafting and copolymerization method. These compounds are used as precursors for PP-graft-PS (PP-g-PS) copolymers and reacted at the matrix interface of PP/PS blends. Functionalized polymer structures were characterized by 1 H NMR and FTIR spectroscopy. The effects of the synthesized compatibilizer on the rheological and morphological behavior of PP/PS blends were investigated systematically. Results showed that the functional polymer was successfully synthesized, and the additional two different compatibilizer systems dramatically decreased the size of the dispersed phase domains in PP/PS blends. Compared with the uncompatibilized blends, compatibilized blends exhibited a slightly higher crystallization temperature because the melting points of the blend components were not evidently affected by the addition of compatibilizer, as revealed by differential scanning calorimetry. The compatibilizer effect on the PP/PS blends was reflected through rheological property and dynamic mechanical analysis. POLYM. ENG. SCI., 55:614–623, 2015. © 2014 Society of Plastics Engineers
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Xiaopeng Zhang,Lin Chen,Longzhu Li,Xiaoming Yan,Junjiang Bao,Ning Zhang,Gaohong He
The introduction of guest metal molecules into metal–organic frameworks (MOFs) is an outstanding method to prepare dual-atom catalysts (DACs) with good oxygen reduction reaction (ORR) activity. However, most of the MOF-derived dual-atom catalysts reported to date exhibit a microporous structure and, therefore, suffer from the underutilization of active sites and poor mass transfer. This study employed NH2-MIL-101 as a precursor to form defect-bearing mesoporous Fe-NC via one-step pyrolysis for adsorbing [Co(en)3]3+, followed by secondary pyrolysis to generate Fe–Co binuclear site catalysts. The mesopores of NH2-MIL-101 are beneficial to [Co(en)3]3+ introduction and can improve the mass transfer of the ORR. Furthermore, the elevated nitrogen content within the [Co(en)3]3+ complex facilitates the co-coordination of Fe and Co with nitrogen, thereby enhancing the formation of Fe–Co diatomic sites. As a result, the obtained FeCo-NC-40 catalyst showed excellent ORR performance with a half-wave potential of 0.915 V (vs RHE). In addition, the liquid-phase Zn–air battery employing FeCo-NC-40 as the cathode catalyst demonstrated a peak power density of 178.13 mW·cm–2 and achieved a discharge specific capacity of 806.13 mAh·g–1 at 10 mA·cm–2, and there was no significant decay in stability for 10 days of continuous cycling.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Yuye Li,Tianao Liu,Tingting Du,Congzhi Hu,Youyong Pang,Yongping Liu,Botian Liu,Ling Li,Huidan Lu,Bin Huang
Dyes and antibiotics possess high stability and are resistant to microbial degradation, leading to their persistence in the natural environment. Photocatalysis is an effective and green degradation method. In this work, a novel Ag/AgCl/NH 2 -MIL-53(Fe) (AAF) heterojunction photocatalyst was prepared using a solvothermal method, precipitation method, and photochemical reduction method, which effectively promotes the separation of photogenerated charge carriers. The study shows that the composite consisting of 95 wt% Ag/AgCl/NH 2 -MIL-53(Fe) (AAF-95) can photocatalytically degrade 99.4% of RhB within 15 min and 82.4% of TC within 12 min, achieving higher photocatalytic degradation activity than the individual materials. The main active species involved in the degradation are h + and •O 2 - . Based on Mott-Schottky tests, radical trapping experiments, and UV-vis DRS, a possible photocatalytic degradation mechanism and the advantages are proposed: AAF-95 broadens the light absorption range, and the NH 2 -MIL-53(Fe) increases the specific surface area, thereby enhancing the catalytic reaction activity. The coupling between the heterojunction and the SPR effect promotes the separation of photogenerated charge carriers and lowers the catalytic reaction barrier. These are the reasons for the enhanced photocatalytic degradation capability of the composite.
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BIOSENSORS & BIOELECTRONICS
·
2026
·
IF 11.8
Lingsong Lu,Yingying Zhang,Bei Liu,Nuo zhou,Dao jun Yu,Ying Wang
Circular RNAs (circRNAs) represent an emerging family of noncoding transcripts defined by closed-loop architecture, which are now established as key participants in the etiology of tumorigenesis and malignant progression. While circRNAs show potential as therapeutic targets and biomarkers, the accurate detection of circRNAs remains challenging due to interference from homologous linear RNAs. In this study, an ultrasensitive method for detecting circ_0051240 based on the sulfhydrated toehold capture probe-initiator assembly-mediated hybridization chain reaction (HCR) and the CRISPR-Cas12a system was developed. The capture probe (with a toehold domain)-initiator strand duplex was ingeniously fabricated to identify the back-splice junction (BSJ) of circRNA. After magnetic enrichment and separation by the Fe 3 O 4 -Au@UIO-66-NH 2 nanocomposite, the initiator strand (H0) was delivered to trigger HCR. The HCR product dsDNA concatemers contained multiply repeated CRISPR-targetable DNA sites that were readily recognized by the CRISPR RNA (crRNA). This specific recognition and binding activated the CRISPR-Cas12a system's collateral endonuclease activity, leading to cleavage of the fluorophore-quencher (FQ) reporters and fluorescence emission at a characteristic wavelength. This design eliminated linear RNA-related interference and enhanced the detection of fluorescence intensity (FI). Under optimal conditions, the proposed HCR/CRISPR-Cas12a method exhibited a wide quantitative measurement range spanning from 45 pM up to 180 nM, achieving a notable limit of detection (LOD) of 0.03 pM. In this study, a novel circRNA sensing strategy capable of accurate and highly sensitive quantification of ovarian cancer-specific circRNA was reported. The proposed method exhibits acceptable performance when compared to present approaches.
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OPTICAL MATERIALS
·
2022
·
IF 3.754
Yang Wang,Sheng Feng,Changchang Ma,Yun Zhou,Zhiwei Ye,Xiaojun Dai,Xun Cao
In this paper, a novel Mn-doped CdS@NH 2 -MIL-125(Ti) (MC@NT) photocatalytic composites was synthetized through hydrothermal method . Hydrogen desorption and tetracycline and oxytetracycline degradation were performed under visible light to test their photocatalytic activities . The composites were characterized by XRD , FTIR, SEM, TEM, XPS , UV–Vis diffuse reflectance spectroscopy (DRS), EPR , EIS, and transient photocurrent response. From the characterization consequence, it could be seen that Mn-doped CdS was tightly attached to the surface of tetragonal NT in the form of nanoparticles . The MC@NT composites exhibited more promising catalytic activity than pristine monomeric materials. The photocatalytic hydrogen evolution rate reached 3.61 mmol g −1 h −1 . Within 110 min, the degradation efficiencies of TC and OTC were 90% and 88%, respectively. The free radical trapping experiments proved that ·O 2 − and h + were decisive role for degrading pollutants in the degradation catalysis process. Radical trapping experiments and electron spin resonance (ESR) indicated that the Z-scheme heterojunction was formed between Mn-doped CdS and NT, leading to facilitate the migration and shift of photogenerated carriers and holes. Cycling experiments showed that the as-prepared composites have good stability and have good prospects for practical applications. We believe this work will offer new ideas on the future development of efficient heterojunction catalysts for light energy conversion and other applications.
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JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Hong Li,Yiming Wang,Rongxiu Guo,Jianwei Zheng,Zejun Sun,Xinyue Zhang,Ying Guo,Hongna Jia,Qionglin Liang,Hong-bin Sun
The heterogeneously tandem catalytic synthesis is a step-economic and work-up-saving strategy for producing chemicals, but it usually requires a special catalyst to achieve the sequential catalytic reactions . The development of metal organic frameworks provides an opportunity to fabricate multifunctional catalysts. In this work, a MOF-based sandwich-nanostructure catalyst UiO-66-NH 2 @Pt@PCN-222 is fabricated, which is made of the UiO-66-NH 2 as the core, Pt nanoparticles as the interlayer, and the defective PCN-222 as the shell. The developed catalyst shows outstanding performance for the tandem catalytic synthesis, which is the hydrogenation of nitroarenes cascaded with β-dicarbonyl compounds to form β-ketoenamines. The selectivity of β-ketoenamines reached 98% upon the completed hydrogenation of p-nitrotoluene. The stable PCN-222 shell can be regarded as an active armor, which not only protects the Pt particles from leaching or agglomerating, but also has plenty of acid sites that are conducive to the second-step condensation. At the same time, the kinetic studies show that the armor layer also affects the activity of hydrogenation, so that the hydrogenation and condensation reactions can proceed simultaneously to give the best selectivity. Various substituted dicarbonyl compounds and structurally different nitroarenes completed the conversion with excellent conversion (90–99%) and selectivity (87–98%), and this nanocatalyst can be recycled for up to six cycles without the expense of activity.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 4
·046524
·
IF 4.386
Binshuai Li,Xinran Liu,Mengai Yin,Lan Xue,Lina Lu,Fuju Dai,Wei Feng,Shengnan Yang,Jun Jiao,Qiang Chen
Chicoric acid (CA), a phenolic acid from chicory, is regarded as a powerful ingredient against oxidative stress and obesity. It's believed to be a promising drug candidate as its healing features prevent memory loss. However, existent methods for CA detection limit its practical applications in purification and further pharmacological study due to lack of accuracy. Therefore, it is crucial to find a forceful approach to precisely analyze cichoric acid for anti-AD research. In this work, we reported a facile method to synthesize Setaria-like trimetallic nanodendrites (G-PP NDs) in a non-compacted core–shell shape with high electrocatalytic activity. In addition, a sensitive biosensor to detect cichoric acid rapidly and accurately has been developed based on G-PP NDs and aminated reduced graphene oxide flakes (NH2-RGO@G-PP NDs). Owing to the great conductivity of NH2-RGO and significant electrochemical performance of G-PP NDs, the obtained sensor exhibited admirable capacities with a low LOD of 0.038 μM. It displayed a high sensitivity, rapid response, and excellent long-term stability, which made it accomplish the measurements CA in chicory samples. The proposed sensor is an auspicious tool for quality control and analysis of metabolism to investigate the beneficial impacts of CA as a functional ingredient to combat AD.
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危险品化学品经营许可证（带存储）