JOURNAL OF CHROMATOGRAPHIC SCIENCE
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2024
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IF 1.5
Song Lixin,Zhang Jian,Wang Mingyu,Huang Zhipeng,Zhang Yunxia,Zhang Xing,Liang Yutao,He Juan
A novel approach for the simultaneous separation of zearalenone (ZEN) and four types of aflatoxins (AFB1, AFB2, AFG1 and AFG2) from rice samples was presented. This approach utilized modified MIL-101(Cr)-NH2 as core, with molecularly imprinted polymers (MIPs) serving as the shell. The MIL-101(Cr)-NH2 was prepared via ring-opening reaction, while the imprinted polymers were synthesized using warfarin and 4-methylumbelliferyl acetate as co-pseudo template, ethylene glycol dimethacrylate as the cross-linker and azobisisobutyronitrile as initiator. The resulting co-pseudo-template-MIPs (CPT-MIPs) were thoroughly characterized and evaluated. Adsorption studies demonstrate that the adsorption process of CPT-MIPs follows a chemical monolayer adsorption mechanism, with imprinted factors ranging from 1.24 to 1.52 and selective factors ranging from 1.29 to 1.52. Self-made columns were prepared, and the method for separation was developed and validated. The limit of detections ranged from 0.12 to 2.09 μg/kg, and the limit of qualifications ranged from 1.2 to 6.25 μg/kg. To assess the reliability of the method, ZEN and AFs were spiked at three different levels, and the recoveries ranged from 79.53 to 94.58%, with relative standard deviations of 2.90–5.78%.
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SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
·
2025
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IF 3.8
Kaiqiang Wang,Xiaoyan Duan,Ye Tian,Hong Lin,Limin Cao,Jianxin Sui
In this work, a novel method for sensitive detecting heavy metal Pb (II) in aquatic products was developed using UiO-66-NH 2 @tannic acid (UiO-66-NH 2 @TA) solid-phase extraction combined with laser-induced breakdown spectroscopy (LIBS). UiO-66-NH 2 @TA adsorbent could effectively extract Pb (II) from the digestive solution of aquatic products. Characterization of the morphology of the adsorbent was performed using transmission electron microscopy and scanning electron microscopy. The optimal experimental conditions for LIBS detection, including sample preparation, substrate type, laser energy, and delay time, were investigated. The results showed that the strongest Pb I 405.7 nm spectral signal can be obtained by dripping UiO-66-NH 2 @TA adsorbent onto a silicon wafer for LIBS testing. The limit of detection and limit of quantification for Pb (II) in aqueous solution were 0.18 μg/mL and 0.61 μg/mL, respectively. The calibration curve demonstrated good sensitivity and accuracy for Pb (II) detection with a correlation coefficient of 0.9905. Spiked recovery experiments on large yellow croakers and scallops yielded recovery rates of 75.25 % - 99.08 %, which was consistent with the results from atomic absorption spectrometry. This study underscores the potential of the solid-phase extraction combined with laser-induced breakdown spectroscopy for practical application in food safety monitoring, demonstrating its effectiveness and reliability in detecting Pb (II) in aquatic products.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Haojie Zeng,Qi Wang,Dingyu Xing,Jiajia Yuan,Feiyun Sun
To solve the freshwater dilemma, photothermal membrane distillation (PMD) has become a promising and sustainable method for desalination and wastewater purification. Ti 3 C 2 T x has attracted much attention in the field of Janus PMD membrane preparation due to its hydrophilic surface and high photothermal conversion efficiency. However, the shortcomings of easy stacking and surface light reflection limit its application. In this work, electrostatic adsorption self-assembly between Ti 3 C 2 T x and UiO-66-NH 2 by pH adjusting is designed, and the Ag-modified Ti 3 C 2 T x aims to significantly improve the photothermal conversion efficiency-Ag@Ti 3 C 2 T x /UiO-66-NH 2 membrane. Compared to the origin Ti 3 C 2 T x membrane, the photothermal layer containing UiO-66-NH 2 contributes to the unimpeded transport of water, and this 3D photothermal layer structure can maximize the capture and absorption of light, which contributes to enhanced high light absorption, photothermal conversion ability and more efficient mass transfer. Thus, a consistently high vapor flux of 1.13 kg/m 2 h and photothermal efficiency over 77.3 % were synchronously obtained, under one solar irradiation. Specifically, Ag@Ti 3 C 2 T x /UiO-66-NH 2 membrane meanwhile exhibits commendable water permeate production and high stability in anti-scaling tests, as well as reliable physical stability, which offers great application potential in PMD process. Our work provides a novel strategy for constructing PMD membrane with stably enhanced mass transfer and photothermal properties to satisfy real application.
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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
·
2026
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IF 6.2
Ying Li,Jue Wang,Yue Liu,Yinshui He,Xiongxin Jiang,Qinglin Li,Yan Ma,Guangbin Yi,Xiaowu Hu
Developing phase change materials (PCMs) with high energy storage efficiency, thermal conductivity, and shape stability is important for thermal management of electronic devices and other low-temperature energy-storage applications. In this study, amino-functionalized MIL-101 (MIL-101-NH₂) was used as a porous metal-organic framework carrier, and lauric acid (LA) was used as the organic PCM. LA was incorporated into MIL-101 and MIL-101-NH₂ through solution impregnation to construct shape-stable composite phase change materials (CPCMs). The optimized LA/MIL-101-NH₂-3 sample exhibited a thermal conductivity of 0.818 W/m·K, which is 337% higher than that of pure LA (0.187 W/m·K), while maintaining a melting enthalpy of 69.4 J/g. Molecular dynamics (MD) simulations further revealed that amino groups on the MIL-101-NH₂ framework form abundant hydrogen bonds with the carboxyl groups of LA, strengthen interfacial phonon coupling, and reduce interfacial thermal resistance. Post-impregnation pore analysis, leakage tests, thermal cycling, and thermal management experiments jointly confirm that the improved performance originates from the synergistic effects of pore confinement, amino-mediated interfacial interactions, and continuous MOF-assisted heat-transfer pathways. This work provides experimental evidence and molecular-level insight for the rational design of MOF-based CPCMs for thermal energy management and broader low-temperature latent heat storage applications.
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CARBON
·
2022
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IF 11.307
Guangyu Wang,Zehua Zhou,Qinghan Hu,Xiangru Shi,Xin Zhang,Kaicheng Zhang,Lintao Wu
Sealing treatment is an effective method to prolong the service life of Fe-based amorphous coatings for steel substrates. Common sealants always have the disadvantages of releasing amounts of volatile organic compounds (VOC) and are expensive, prompting researchers to develop an eco-friendly, low cost and high-performance sealant. However, their simultaneous improvement is restricted by some inevitable contradictions among them. Herein, natural rosin was introduced as a sealing material and an eco-friendly natural rosin-based SiO 2 –NH 2 @GO hybrid sealant was successfully prepared by the sol-gel method. In addition, the functional nanocomposite SiO 2 –NH 2 @GO was added to the hybrid sealant system to achieve the purpose of extending the service life of the sealant. The filling efficiency, adhesion, thermal stability and long-term corrosion resistance of hybrid sealants were investigated. The study showed that the adhesion of the hybrid sealant to the Fe-based amorphous coating was improved by 10.59% after adding the nanocomposite. The hybrid sealant reaches maximum thermal decomposition at 414.3 °C. The corrosion current density ( i corr ) of the sample NSG-0.5‰ still decreased by about two orders of magnitude after immersion for 672 h (0#, i corr = 1.39 × 10 −4 A/cm 2 ; NSG-0.5‰, i corr = 1.51 × 10 −6 A/cm 2 ). Full immersion experiments explore the failure process of hybrid sealants, where corrosion always tends to propagate with unmelted particles. The hybrid sealant prepared has the advantages of being eco-friendly and low cost, and provides a specific preparation process, which provides a new direction for the development of the sealant.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Jian Wang,Changchun Chen,Zhihao Zhao,Cheng Cheng,Zhonghai Tang,Zhou Du,Yifeng Wang,Lin Pan
Considerable attentions are currently paid to water pollution, which seriously threats human health. Semiconductor catalysts with step-like (S-scheme) heterojunction are often used for degrading organic pollutants in water bodies due to their high carrier separation efficiency, high redox capacity, and broad light absorption capacity. In this paper, a novel S-scheme N-doped g-C 3 N 4 /NH 2 -MIL-125(Ti) heterojunction composite is synthesized for photodegradation of organic pollutants. The structural measurements indicate that the NH 2 -MIL-125(Ti) nanoparticles are intimately anchored on the surface of porous N-doped g-C 3 N 4 nanosheets . The experimental characterizations as well as the DFT theoretical calculation for samples demonstrate that the N-doped g-C 3 N 4 /NH 2 -MIL-125(Ti) composites not only bear larger specific surface area providing abundant reactive sites, but also improve the separation efficiency of photogenerated carriers during photodegradation. In addition, the degradation rate of RhB solution catalyzed by 25 wt% N-doped g-C 3 N 4 /NH 2 -MIL-125(Ti) (25 wt% NCM) attains the highest degradation rate (96.4%) under visible light irradiation. Moreover, the mineralization of RhB solution and intermediates produced in the degradation process are analyzed by total organic carbon (TOC) and high- performance liquid chromatography (HPLC) tests, respectively. Electron paramagnetic resonance (EPR) with free radical capture measurements show that the photodegradation of RhB is mainly ascribed to the superoxide radicals (·O 2 - ) and hole (h + ). This study provides an effective method to construct S-scheme heterojunction photocatalysts and apply them to wastewater treatment.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Zhiwen Li,Wentian Zhang,Min Tao,Liguo Shen,Renjie Li,Meijia Zhang,Yang Jiao,Huachang Hong,Yanchao Xu,Hongjun Lin
In-situ growth of UiO-66-NH 2 in ordinary porous polymeric substrates offers promising opportunities to eliminate interfacial defects in mixed matrix membranes (MMMs). However, this strategy is still hard to be realized because conventional hydrothermal synthesis of UiO-66-NH 2 involves harsh conditions (e.g., high temperatures, and polar aprotic solvents), which are destructive to ordinary polymer. Herein, UiO-66-NH 2 was in-situ grown in polymeric substrates under room temperature via a successive immersion of a porous polyether sulfones substrate in a Zr 4+ formic acid/ethanol solution and a 2-aminoterephthalic acid ethanol/formic acid/water solution. Attenuated total refraction Fourier transform infrared and X-ray diffraction characterizations demonstrated the successful incorporation of UiO-66-NH 2 in the substrate. The optimized membrane possessed a high pure water permeance of 209.5 L -2 h −1 bar −1 and rejections higher than 99.5% towards small molecules of Congo Red, xylene brilliant cyanin G, and Rose Bengal sodium salt. More importantly, after a 5-day immersion in water or an intense ultrasonication treatment, the membrane showed no significant change in separation performance, suggesting its excellent stability. The novel strategy regarding MMMs with UiO-66-NH 2 in-situ growth disclosed in this study paves the way to develop advanced UiO-66-NH 2 membranes toward sustainable molecular separation in environmental applications.
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MICROCHEMICAL JOURNAL
·
2023
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IF 4.8
Zhi Luo,Yusheng Wu,Dongmiao Qin,Shuo Meng,Chujie Zeng,Biyang Deng
A luminescent reagent, 3,4,9,10-perylenetetracarboxylic acid (PTCA), was linked to a metal–organic framework (MOF) Fe(III)-MIL-88B-NH 2 through an amide reaction to form a [email protected] (III)-MIL-88B-NH 2 complex, and then gold nanoparticles (AuNPs) were grown in situ. Thus, the [email protected] (III)-MIL-88B-NH 2 @Au electrochemiluminescence (ECL) probe was obtained. The MOF of 2-aminoterephthalic acid with large specific surface area, pore sizes, and structures, which served both as the carrier and a co-reaction promoter, promoted the conversion of more S 2 O 8 2- into SO 4 •- , further enhancing the ECL signal of PTCA. An electrochemiluminescence resonance energy transfer (ECL-RET) platform was designed for the ultrasensitive and highly selective detection of cystatin C (CysC). The developed ECL-RET biosensor presented a linear range from 0.01 pg/mL to 100 ng/mL and a detection limit of 2.2 fg/mL (S/N = 3). Moreover, all the results showed that the developed ECL-RET biosensor broadened the application in the fields of biosensing and medical diagnosis.
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APPLIED SURFACE SCIENCE
·
2021
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IF 6.707
Chong Chen,Xue Li,Weixin Zou,Hui Wan,Lin Dong,Guofeng Guan
Methane is regarded as a potential alternative energy and chemical raw material, and its separation from biogas by capturing CO 2 has become a hot issue of great significance and challenge. Taking the low partial pressure of CO 2 in biogas (~50% CO 2 and ~50% CH 4 ) into consideration, a facile pre-synthetic method was applied to endow UiO-66-NH 2 with high adsorption capacity and selectivity toward CO 2 , via interligands cross-linking of two-molecule 2-aminoterephthalic acids through amidation reaction. At 298 K, the CO 2 uptakes of UiO-66-DAM at 0.5 and 1 bar were 36.7 and 54.1 cm 3 ·g −1 respectively, which were 16.9% and 12.7% higher than those of UiO-66-NH 2 . Meanwhile, the CO 2 /CH 4 selectivity of UiO-66-DAM at 1 bar was 1.43 times that of unlinked framework. It could be speculatively attributed to the cooperative effects of amide functional groups and smaller pore diameter of UiO-66-DAM, which synergized with open Zr(IV) sites to enhance the binding affinity toward CO 2 . Moreover, the higher isosteric heats of adsorption for modified MOF at low loading also revealed the strong interactions between polar pore surfaces and guest CO 2 molecules. Along with the highly reversible adsorption-desorption behavior during recycling, the ligand-cross-linked UiO-66-DAM could be very promising for future practical applications of selective gas separation.
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TALANTA
·
2021
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IF 6.057
Wenpeng Gong,Li Zhang,Ying Yu,Bixia Lin,Yumin Wang,Manli Guo,Yujuan Cao
Hydrogen sulfide is typical metabolic marker and environmental pollutant which is worthwhile to determine. Herein, a low background and high sensitivity fluorescent strategy based on double modifications of metal organic framework material CAU-10-NH 2 is proposed for the determination of hydrogen sulfide. Firstly, a functional monomer 3,5-diaminobenzoic acid is employed to modify on the CAU-10-NH 2 , the product CAU-10-NH-dAba has strong fluorescent performance at 412 nm under an excitation wavelength of 320 nm. Subsequently, it is further modified by the azide group to form CAU-10-NH-dAba-N 3 . This azidation inhibits the fluorescent signal. However, in the presence of hydrogen sulfide, the azide group is specifically reduced to amidogen, and results in the recovery of the fluorescence. The CAU-10-NH-DABA-N 3 was characterized by solid state NMR , XPS, fluorescence, IR, XRD, SEM and specific surface area. After the optimization of pH value, temperature and interaction time, the detection results of hydrogen sulfide demonstrate the linear range of this strategy is from 20 to 140 nM with a detection limit of 1.51 nM, which is significantly better than that of the CAU-10-NH 2 merely modified by 3,5-dinitrobenzoic acid. Meanwhile, the satisfactory assay results of hydrogen sulfide in serum sample and Pearl river water suggest a potential application prospect of this strategy in clinical diagnosis and environment monitoring.
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CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Syed Jalil Shah,Ruimeng Wang,Zhu Gao,Yaseen Muhammad,Hanzhuo Zhang,ZhengSheng Zhang,Zhe Chu,Zhongxing Zhao,Zhenxia Zhao
A novel strategy and design for ionic liquid (IL) assisted in-situ grafting of polyaniline (PANI) oligomers in NH 2 -MIL-125 was proposed to synthesize the defect-rich IL-PANI/NMIL(Ti) nanohybrids with an intimate interface for the superior photodegradation of CH 3 CHO. PANI was dissolved into small oligomers with the aid of IL [EMIM]BF 4 and was composited to NH 2 -MIL-125 by a strong interfacial connection through Ti-N bonds (XPS) with high dispersion and large surface area (BET = 1125 m 2 /g). Characterizations results showed that smart grafting of PANI-oligomers generated abundant defects (3.4-times, ESR) and intensified Lewis acid sites (1.2-times, CO-DRIFT) in IL-PANI/NMIL(Ti) compared to NH 2 -MIL-125. It promoted adsorptive interactions for aldehyde VOCs capturing, which in-turn increased the adsorption rate ( k a ) of CH 3 CHO. Smart grafting also improved the light absorption of IL-PANI/NMIL(Ti) from 500 to 800 nm, reduced band gap (1.7 eV), increased photo-current density (2.2-folds of pure MOF), enhanced O 2 − and OH radicals generation and improved e − /h + mobility. As a result, IL-PANI/NMIL(Ti) showed 11.4 and 4.2 times higher k a (0.262 min −1 ) of CH 3 CHO photodegradation kinetics than PANI and NH 2 -MIL-125, respectively, at 75% relative humidity (RH). The k a of CH 3 CHO degradation was steadily increased with increasing humidity (<80 RH%), indicating that H 2 O from humid air was beneficial for CH 3 CHO degradation. Furthermore, IL-PANI/NMIL(Ti) exhibited the excellent recycling stability compared to NH 2 -MIL-125, as only a 5% decrease in photocatalytic activity was observed after five cycling runs. Considering the excellent photostability and ultrafast photodegradation of CH 3 CHO, the current study opens up new perspectives in fabricating MOFs for a wide-range of practical applications.
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BIOSENSORS & BIOELECTRONICS
·
2019
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IF 9.518
Ting Xue,Yingying Sheng,Jingkun Xu,Yingying Li,Xinyu Lu,Yifu Zhu,Xuemin Duan,Yangping Wen
The environmental stability, water-processibility and life-span of black phosphorene (BP) severely limit the application of its electronic devices in aqueous system containing oxygen. We reported the controllable preparation of in-situ reduction and deposition of silver nanoparticles on the BP surface and its amino-functionalized multi-walled carbon nanotubes (NH 2 -MWCNT) nanocomposite . With the addition of both NH 2 -MWCNT and Ag + , the BP-based nanocomposite was prepared by ultrasonic-assisted liquid-phase exfoliation and was dispersed in carboxymethyl cellulose sodium (CMC) aqueous solution. The morphology, microstructure, and electrochemical properties of the nanohybrid were characterized. NH 2 -MWCNT-BP-AgNPs showed high environmental stability, good water-processibility, satisfactory life-spans, superior electrocatalytic capacity with enzyme-like kinetic characteristics. The nanohybrid was applied as electrochemical sensors for single/simultaneous analysis of uric acid (UA), xanthine (XT) and hypoxanthine (HX). Excellent voltammetric responses for simultaneous determination in linear ranges of 0.1–800 μM with a limit of detection (LOD) of 0.052 μM for UA, 0.5–680 μM with a LOD of 0.021 μM for XT, and 0.7–320 μM with a LOD of 0.025 μM for HX under optimal conditions. Besides, the developed nanozyme sensor was employed for simultaneous voltammetric analysis of UA, XT and HX in real samples with acceptable recoveries. This work will provide theoretical guidance and experimental support for the preparation and application of two-dimensional materials, nanozymes and sensing devices.
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