FOOD AND CHEMICAL TOXICOLOGY
·
2022
·
IF 5.572
Ruijuan Lv,Ruimeng Sun,Ting Du,Yuhan Li,Lixia Chen,Yang Zhang,Yanfei Qi
A sensitive electrochemical sensor for sunset yellow (SY) was constructed based on cetyltrimethylammonium bromide (CTAB) functionalized graphene (Gr) and Cu/Zr-MOF electrode modified materials. The CTAB-Gr-Cu/Zr-MOF composites were synthesized by using a mild method and characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and EDX spectrum. The combination of Cu/Zr-MOF and graphene exhibited synergetic effect of the strong accumulation efficiency, fast electron transfer rate and more sensing sites towards the oxidation of SY. The new modified materials remarkably increased the electrochemical response of SY to 6.53-fold when comparing with bare electrode. Under the optimized conditions, the oxidation peak currents of SY had a linear relationship with its concentration in a wide range from 0.10 to 8.00 μM and 40.00–1000.00 μM, and the limit of detection was 6.68 nM (S/N = 3). The electrochemical method shows high sensitivity, stability, reproducibility and is successfully applied in the determination of SY in soft drinks.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Zhuoxue Li,Yunlei Shi,Yimian Ding,Dazhen Xiong,Zhiyong Li,Huiyong Wang,Jikuan Qiu,Xiaopeng Xuan,Jianji Wang
A Pickering emulsion is a natural microreactor for interfacial catalysis in which an emulsifier is critical. Recently, a metal–organic framework (MOF) has attracted attention to emulsify water–organic mixtures for constructing a Pickering emulsion. However, a few stimuli-responsive Pickering emulsions based on MOFs have been reported, and the MOF emulsifiers cannot be regenerated at room temperature. Herein, the Zr-MOF with a rodlike morphology is synthesized using ionic liquid as a modulator and then modified with n-(trimethoxysilylpropyl)imidazole (C3im) to prepare a series of functionalized Zr-MOFs (MOF-C3im). It is found that MOF-C3im is an excellent emulsifier to construct stable and CO2-responsive Pickering emulsions even at low content (>0.20 wt %). Notably, the emulsification and demulsification of the emulsions can be easily and reversibly switched by bubbling of CO2 and N2 alternatively at room temperature because CO2 and imidazole molecules anchored on the Zr-MOF underwent a reversible acid–base reaction, resulting in an obvious change in the wettability of the emulsifier. As a proof of concept, the reduction reactions of nitrobenzene have been successfully carried out in these Pickering emulsions, demonstrating the efficient integration as a microreactor for chemical reaction, product separation, and emulsifier recycling under ambient conditions. This strategy provides an innovative option to develop stimulus-responsive Pickering emulsions for sustainable chemical processes.
研究领域:
材料科学
·
化学工程
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Ding Wang,Xiaohua Jia,Zhiqiang Shan,Li Gao,Jin Yang,Zhaofeng Wang,Haojie Song
Fluorinated graphene (FG) among numerous two-dimensional materials has enormous potential in improving antifriction properties. However, they being susceptible to thermal oxidation and prone to wear hinder practical applications. Herein, UIO-66-NH2 (Zr-MOF) enjoying good chemical and thermal stabilities was assembled on the surface of FG nanosheets under covalent bonds and van der Waals forces. The Zr-MOF@FG composite was successfully synthesized and used as a lubricant additive. It can be seen that Zr-MOF@FG composites offer a synergistic lubricant mechanism at the friction interface. Moreover, due to the adsorption and purification performance of Zr-MOF, the obtained Zr-MOF@FG composite adsorbs the abrasive rust during the friction process, thereby realizing the purification of the lubricant. These findings suggest that Zr-MOF@FG shows tremendous potential as a lubricant additive.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Li Chen,Limin Zheng,Fangqi Wang,Simin Yi,Donghao Liu,Xinzhi Huang,Rong Chen,Hua He
In the present work, a dual-emission sensor constructed with CdTe quantum dots and Zr-MOF, was developed for sensing ascorbic acid (AA). Based on the distinct fluorescent responses of CdTe and UiO-66-NH 2 to AA, UiO-66-NH 2 @CdTe can be developed as a ratiometric sensor for AA detection. In this ratiometric sensor, the emission of UiO-66-NH 2 is quenched while the emission of CdTe is increased with the addition of AA. Benefiting from the confinement effect of the UiO-66-NH 2 host, the presented sensor showed good sensitivity toward AA and great selectivity over other structural analogs.
研究领域:
分析化学
·
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Fankang Zhao,Shengqiong Fang,Yanxin Gao,Jinhong Bi
The functionalization of metal–organic frameworks (MOFs) is imperative and challenging for the development of practical MOF-based materials. Herein, a magnetically functionalized Zr-MOF (Fe 3 O 4 @MOF-525) was synthesized via secondary-growth approach to obtain an easily-separated and recyclable adsorbent for the removal of pharmaceuticals (tetracycline (TC) and diclofenac sodium (DF)). After loading Fe 3 O 4 nanoparticles (NPs), due to the increase of micropore volume and specific surface area caused by defects, the adsorption performance of Fe 3 O 4 @MOF-525 was improved. The kinetics could be described by the pseudo-second-order kinetic model. The different adsorption capacity and initial rate were attributed to the properties of the pharmaceuticals, including the molecular size and hydrophobicity/hydrophilicity. In isotherm experiments, the maximum adsorption capacities of DF and TC on Fe 3 O 4 @MOF-525 calculated by Sips model reached 745 and 277 mg·g −1 , respectively. The thermodynamic studies indicated the adsorption was endothermic and spontaneous. The effect of pH suggested that electrostatic interaction, π-π interaction, anion-π interaction, and H-bonding were possibly involved in the adsorption process. The adsorbent was separated by magnetic and regenerated. Washed with ethanol, Fe 3 O 4 @MOF-525 remained about 80% adsorption capacity after four cycles. In-situ photo-regeneration under visible-light irradiation was another attractive method, where > 95% TC was degraded in 4 h. The reaction with scavengers revealed that 1 O 2 was the dominant reactive species in our system, indicating the occurrence of Type II photosensitization. The separability, excellent adsorption performance, and recyclability of Fe 3 O 4 @MOF-525 may lead to its beneficial applications in water treatment.
研究领域:
环境科学
·
材料科学
·
药学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 12
·5311-5325
·
IF 2.7
Pengna Huang,Xianjin Qi,Xiaoxu Duan,Wenqi Jiang,Nina Yang,Gang Zhi,Jianhua Wang
The low adsorption capacity of metal–organic frameworks (MOFs) limits their practical application in high-arsenic wastewater for adsorption owing to their insufficient active sites and suboptimal pore structure. Accordingly, we employed a one-pot hydrothermal method to synthesise mixed-metal La/Zr-MOFs with complex pore structures. Notably, the material possesses both La-BDC and Zr-BDC morphology features and integrates the advantages of monometallic MOFs through a framework symbiotic structure. This complex pore structure promotes the migration and diffusion of arsenic ions in the pore channels, improving the adsorption kinetics. Moreover, mixed-metal functional centres can expose more active sites, which is conducive to enhancing adsorption capacity. Experiments showed that mixed-metal La/Zr-BDC-4 rapidly reached adsorption equilibrium in 60 min, corresponding to a maximum adsorption amount of 694 mg g−1. Batch adsorption experiments and X-ray photoelectron and Fourier-transform infrared spectroscopy analyses revealed that mixed-metal La/Zr-BDC-4 arsenates tend to form internal complexes with each other, suggesting that As(V) adsorption is an exothermic and spontaneous chemisorption process. After four adsorption–desorption cycles, the material maintained an arsenic removal rate of 85%, exhibiting its potential application in wastewater treatment. Therefore, the mixed-metal La/Zr-BDC-4 MOF is a promising material for wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Fan Yang,Weiyang Li,Bohejin Tang
An amorphous metal-organic framework (aMOF) UiO-66 (Zr-MOF) was prepared directly from synthesis, different from experiments involving heating, pressure, and ball-milling by other researchers. The as-prepared amorphous UiO-66 has been successfully used as a supercapacitor electrode material, exhibiting a high specific capacitance (920 F g −1 at 10 mV s −1 ) superior to crystalline UiO-66. It has been verified that the material after reaction can still remain amorphous state by transmission electron microscopy (TEM). The capacitance of amorphous UiO-66 can maintain 610 F g −1 after 5000 cycles, suggesting its promising potential as a supercapacitor electrode material.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Shuda Liu,Na Dong,Shuyun Meng,Yuye Li,Yuqing Li,Siyuan Wang,Dong Liu,Tianyan You
Comprehending the biosensing mechanism of the biosensor interface is crucial for sensor development, yet accurately reflecting interfacial interactions within actual detection environments remains an unsolved challenge. An operando photoelectrochemical surface-enhanced Raman spectroscopy (PEC-SERS) biosensing platform was developed, capable of simultaneously capturing photocurrent and SERS signals, allowing operando characterization of the interfacial biosensing behavior. Porphyrin-based MOFs (Zr-MOF) served as bifunctional nanotags, providing a photocurrent and stable Raman signal output under 532 nm laser irradiation. Aptamer was used to bridge the Zr-MOF and the silver-encased gold nanodumbbells (AuNDs@AgNPs). The simultaneous in situ acquisition of target-induced PEC and SERS signal responses facilitated the correlation of electron transfer information from the photocurrent with the distance information from the SERS signal. It revealed the biosensing mechanism in which target-induced aptamer conformational bending drove the Zr-MOF to approach the electrode. However, the increase in charge transfer observed through conventional electrochemical methods contradicts the conclusions drawn from the operando PEC-SERS analysis. Comprehensive analysis indicated that redox probes introduced during the non-in-situ measurement process became adsorbed within the MOF pores, potentially affecting the judgment of the biosensing mechanism. In addition, the operando PEC-SERS biosensor simultaneously obtained two independent signals, providing self-verification to improve the accuracy and reliability of patulin detection. The linear ranges were 1 pg mL–1–10 ng mL–1 for the PEC method and 1 pg mL–1–100 ng mL–1 for the SERS method, respectively. This work provides a powerful tool for determining the interface characteristics of biosensors.
研究领域:
分析化学
·
生物传感技术
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Xuejiao Wang,Jing Yang,Ming Zhang,Qian Hu,Bai-Xue Li,Jin Qu,Zhong-Zhen Yu,Dongzhi Yang
We design a spontaneously super-hygroscopic alkaline microreactor by photoinduced integration of Zr-MOF catalyst and alkaline poly(dimethylaminoethyl acrylate) onto LiCl-salinized poly(N-isopropylacrylamide) gel, generating a microenvironment with non-volatile polymeric base and non-bulk water for detoxification of a typical nerve agent simulant, dimethyl 4-nitrophenyl phosphate (DMNP), in atmospheric environments. The super-hygroscopic gel with directional microchannels facilitates the absorption, transport and storage of water under different humidities, and exhibits fast hygroscopic efficiency with a high moisture absorption capacity of 6.4 g g −1 . The integrated microreactor achieves simultaneous water uptake and catalytic hydrolysis of DMNP in an atmospheric environment with an initial half-life of ∼1.9 h and a final conversion of 95.5%, which is attributed to the synergistic catalytic microenvironment of the exposed Zr-MOF catalyst, the polymeric base, and the water from moist air. This work provides a feasible strategy for designing spontaneously hygroscopic microreactors for detoxifying nerve agent simulants in atmospheric environments.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2025
·
IF 4.5
Runran Ma,Te Li,Xueying Li,Jianwei Han,Xin Zhang,Tingting Di,Jiabo Wang,Weijun Kong
A ratiometric electrochemical aptasensor was developed for ultra-sensitive detection of cortisol using aptamer (Apt) as recognition element, methylene blue (MB) as signal probe, and zirconium metal–organic framework (Zr-MOF) as carrier loaded with abundant MB for signal amplification. The carboxylated multi-walled carbon nanotubes (cMWCNTs)-modified Au electrode showed excellent electrochemical performance to immobilize complementary DNA (cDNA) for hybridizing with MB@Zr-MOF-Apt via amide bonds. In the presence of cortisol, it would compete with cDNA for binding the Apt, resulting in the detachment of MB@Zr-MOF-Apt complex from the electrode surface, and the electrochemical signal of MB was decreased, while that of [Fe(CN) 6 ] 3−/4− was basically unchanged. The ratio of the electrochemical signals of [Fe(CN) 6 ] 3−/4− to MB was proportional to the cortisol concentration. Due to the greatly enhanced conductivity of the cMWCNTs-decorated Au electrode and the largely improved EC signals of Zr-MOF encapsulated MB probes, this ratiometric electrochemical aptasensor offered high sensitivity with an ultra-low detection limit of 0.0046 nM and a wide linearity of 0.01–1000 nM, as well as satisfactory accuracy with recoveries of 93.79–106.76 % in artificial sweat samples, providing a potential strategy for the detection of more trace hormones in different clinical samples by simply replacing the corresponding aptamers.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 3.7
Jiangyan Song,Yongyi Yu,Ziyi Zhang,Weisen Yang,Wenbin Pan,Shaoju Jian,Shaohua Jiang,Jiapeng Hu
Deposition of excessive phosphate in natural water column caused several issues, like the eutrophication and destruction of aquatic ecosystems. Adsorption has been an effective and convenient method for phosphate elimination. Herein, a novel bimetallic metal–organic framework adsorbent, namely, La-Zr-MOF, was prepared, and the morphology, crystallite, characteristic functional groups, specific surface area, and composite material surfaces were analyzed using XRD, FT-IR, SEM-EDS, and BET. The adsorption performance of the adsorbent was systematically evaluated by batch adsorption experiments, and the adsorption thermodynamic and kinetic properties were analyzed. The results reveal that La-Zr-MOF exhibits a high selectivity and sorption performance for phosphate, and the adsorption of La-Zr-MOF follows the Langmuir and pseudo–second-order models; the phosphate removal procedure is a chemisorption accompanied by an endothermic reaction, and the maximum capacity was 127.7 mg g −1 . Combined with batch adsorption experiments, kinetic and thermodynamic studies and various characterization analyses together revealed the phosphate removal mechanism, mainly ligand exchange and electrostatic interactions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Rongbo Li,Zemin Li,Yuqi Zhu,Yichang Pan,Rujing Hou
The separation of benzene/cyclohexane (BZ/CHX) represents a critical yet challenging task in the chemical industry, as their nearly identical boiling points and kinetic diameters render conventional distillation highly energy-intensive. Pervaporation, driven by a transmembrane pressure difference, offers an energy-efficient alternative by breaking the azeotropic equilibrium of BZ/CHX mixtures. Metal–organic framework (MOF) membranes have emerged as promising candidates for such separations owing to their exceptional structural tunability. However, their application in this context remains largely unexplored. Herein, we report a dual-ligand engineering strategy to fabricate UiO-66-CDC MOF membranes, wherein a cubic alkane ligand is incorporated into a planar parent ligand to create a dual-ligand-modified framework. This approach enables precise regulation of the pore microenvironment and enhances preferential adsorption and recognition of aromatic benzene over aliphatic cyclohexane through multiple interactions (C···C, H···C, C–H···π, C–H···O, and π···π). Consequently, under a single-stage operation with an equimolar (50:50) BZ/CHX feed, the optimized membrane delivered a permeation flux of 478 g m −2 h −1 and a separation factor of 5.8, corresponding to a 40% increase in flux and an 81% increase in separation factor, respectively, over the control membrane, and yielding a 110% higher PSI. When further applied to a two-stage membrane separation process, the total flux and separation factor reached 1747 g m −2 h −1 and 40.7, respectively, demonstrating the potential of process intensification. This dual-ligand design offers fundamental guidance for the development of advanced separation membranes targeting diverse aromatic/alkane mixtures.
✓ 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）