FOOD HYDROCOLLOIDS
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2024
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IF 11
Peini Li,Yiqing Deng,Wangcai Zou,Zhenqiao Ma,Xiandi Yang,Qiang Zhao
As living standards improve, the demand for food freshness has gradually increased. Multifunctional packaging materials that monitor food freshness in real-time, delay spoilage, and are environmentally friendly have emerged as ideal solutions. This study synthesized an ammonia-sensitive copper-based metal-organic framework (Cu-MOF) and incorporated it into a matrix composed of chitosan (CS) and gelatin (Gel). The resulting film exhibits ammonia-sensitive color-changing properties, antibacterial activity, and excellent biodegradability. The effects of Cu-MOF incorporation on the structural, physical, and functional properties of the CS/Gel films were systematically evaluated. Results demonstrated that the Cu-MOF was uniformly distributed within the CS/Gel matrix, significantly enhancing the mechanical properties (tensile strength increased by 68.49%), oxygen/water vapor barrier properties, and UV-blocking capability of the films. Notably, the CS/Gel@Cu-MOF films exhibited excellent antibacterial performance, with sterilization rates of 94.2% against Escherichia coli and 99.6% against Staphylococcus aureus . Additionally, the films showed good biocompatibility, biodegradability, and a sensitive color response to ammonia. The films were successfully used to monitor shrimp freshness through color change, transitioning from light green to brown as spoilage occurred. These findings indicate that CS/Gel@Cu-MOF films have significant potential for real-time visual freshness monitoring in food packaging, contributing to reduced food safety risks and waste.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Jiao Wang,Kexin Liu,Lei Shi,Jinshan Xie,Manman Zhao,Wulong Li,Zhanxiong Li
Metal-organic frameworks (MOFs) have exhibited great potential in various adsorption and separation fields, such as the adsorption of metal ions, separation of organic pollutants, and recovery of precious metals from aqueous-based matrices. Here, we prepared a series of sulfur-doping Zr-MOF-fabric composites by in-situ growth of zirconium metal ions with sulfur-containing organic ligands on the surface of carboxylated fabrics (CF-Ph-COOH). The formic acid (FA) regulated mercaptosuccinic acid (MSA) and 2,2’-dithiobisbenzoic acid (DTSA) Zr-MOF-fabric (CF-Zr-MSA-FA and CF-Zr-DTSA-FA) composites exhibit excellent Au 3 + adsorption from water with saturated adsorption capacities of 141.15 mg/g and 169.28 mg/g, respectively, and showing over 90 % adsorption removal rate in the pH range of 2–6, especially for CF-Zr-DTSA-FA could maintain more than 99.99 %. Most strikingly, the prepared MOF-fabric composites display excellent selective adsorption for Au 3+ in mixed solutions, and the selective adsorption efficiency of CF-Zr-MSA-FA and CF-Zr-DTSA-FA was up to 95.69 % and 85.37 %, respectively. Finally, the prepared MOF-fabric composites can be reused as filtering membrane for gold recovery, which also could provide a facile strategy to recover gold from water, and extending the practical applications of MOFs textile composite.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Ziwen Song,Qiqi Huang,Shizhao Zhang,Songlin Luo,Mengdie Su,Xin Yang,Shaopeng Wang,Liwei Wang
2-Aminophenol (2-AP) is an organic compound with antibacterial and antioxidant properties in cosmetics, detergents, dyes, and pharmaceuticals. In particular, human health and the environment can be significantly threatened when the concentration of phenolic substances in water reaches 0.1005 mg/L. Hence, there is an urgent need to develop a prompt and accurate analyzing method of 2-AP. To this end, Cu-MOF material was employed as a substrate, and its conductivity and catalytic properties were then enhanced by incorporating Tp-BD-DBd COF within the pores. This COF@MOF composite incorporation, named Tp-COF@Cu-BDC, introduced not only extensive π-conjugated systems but also the mutual electron-donating amino and carboxylate electron-withdrawing groups that may help improve the adsorption capability of 2-AP. Consequently, an increase in conductivity of the Tp-COF@Cu-BDC composite was achieved compared with the MOF monomer. At the same time, the fabricated sensor exhibited a broad detection range (2–250 μM), a low detection limit (0.597 μM), remarkable anti-interference capabilities, and a high recovery rate for 2-AP. Furthermore, the recovery experiment results have proved the actual samples’ detection capability based on our electrochemical sensor. Thus, it can be inferred that the COF@MOF composite-based electrochemical sensor is a highly effective platform for detecting 2-AP in environmental settings.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Wenjin Ni,Sicheng Zhang,Lingling Cheng,Tiejun Luo,Hongyun Yang,Tengfei Duan,Dejian Yan
Developing efficient photoanodes for water oxidation is highly promising due to their critical role in producing green H 2 and harnessing solar energy. Herein, a metal-organic framework (MOF)/photoanode was successfully constructed by coating TiO 2 nanorods with MIL-88(Fe) MOF for photoelectrochemical (PEC) water splitting. The results demonstrated that MIL-88(Fe) was uniformly and tightly coated on TiO 2 and functioned as a cocatalyst. The MIL-88(Fe) MOF provides a large surface area and more Fe-O active sites, contributing to high PEC activity by reducing electron/hole recombination and enhancing light response capability. Moreover, the photoanode also exhibited an improved charge conductivity. As a result, the MIL-88(Fe)/TiO 2 photoanode exhibited an excellent photocurrent density of 1.06 mA cm −2 at 1.23 V RHE , which is approximately 2.6 times higher than the pristine TiO 2 . Charge transfer kinetics analyses and electrochemical tests were carried out and revealed that the improved PEC performance was attributed to the introduction of MIL-88(Fe), which promoted charge separation-transfer. This research provided new insights into the design of efficient semiconductor/MOF composite photoanodes for PEC water oxidation.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2017
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IF 3.012
Qi Chen,Xi Li,Xinmin Min,Dan Cheng,Jian Zhou,Yugang Li,Zhizhong Xie,Peng Liu,Weiquan Cai,Chaocan Zhang
A composite (MOF-GO) of Cu-based MOF-199 (MOF) and graphene oxide (GO) was prepared by the solvothermal method and used as the modified material to fabricate an electrochemical sensor for the determination of catechol (CT) and hydroquinone (HQ). The modification was carried out through the electrodeposition of MOF-GO composites on the glassy carbon electrode and the transformation of MOF-GO to MOF-ERGO by an electrochemical reduction . Differential pulse voltammetry (DPV) was employed for exploring the electrochemical properties of the as-prepared electrode and the oxidation of CT and HQ at the modified electrode . Under the optimized experimental condition, the linear calibration curve was obtained in the range from 0.1 μM to 566 μM for CT ( R 2 = 0.997) and 0.1 μM to 476 μM for HQ ( R 2 = 0.999) with the same low detection limit of 0.1 μM ( S / N = 3). The experimental results showed that the modified electrode was easily fabricated in control and exhibited the outstanding stability. The validity for practical samples detection of CT and HQ was also demonstrated with satisfactory results.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
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IF 8.328
Lun Pan,Tahir Muhammad,Lu Ma,Zhen-Feng Huang,Songbo Wang,Li Wang,Ji-Jun Zou,Xiangwen Zhang
ZnO is an important semiconductor that has been widely applied in solar cell, photocatalysis, environmental remediation. Doping and morphology control are important approaches to improve its photocatalytic performance. Herein, a facile two-step calcination method was developed to fabricate carbon(C)-doped cubic ZnO with porous structure from zeolite imidazolate frameworks (ZIF-8). Compared with one-step pyrolysis, the approach of two-step calcination not only retains the cubic morphology with inter-connected ZnO nanoparticles and porous structure but also introduces C doping in ZnO lattice effectively. This morphology has advantage in charge transfer, optical absorption and mass transfer during the photoreaction, and C doping results in high charge-separation efficiency. The sample C350-400 (C-doped ZnO, firstly calcined at 350 °C for 2 h from ZIF-8, then 400 °C for 1 h) shows the maximum photoactivity, which is ca . 3-fold and 4-fold higher than ZnO (C450) in photodegradation and PEC water splitting (under UV–vis irradiation), respectively. It is expected that the preparation of metal oxide from MOF is a very promising way to fabricate highly efficient photocatalyst.
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RSC Advances
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2015
·Vol. 6
·期 5
·3671-3679
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IF 3.84
Aoning Wang,Yingjie Zhou,Zhoulu Wang,Miao Chen,Luyi Sun,Xiang Liu
A UiO-66-type metal–organic framework (MOF) fabricated with titanium was successfully prepared via a facial modified post-grafting method. The as-prepared samples were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), ultraviolet-visible adsorption spectroscopy (UV-vis), and photoluminescence spectroscopy (PL) techniques. The introduction of titanium enhanced the optical properties of UiO-66 via the formation of oxo-bridged hetero-Zr–Ti clusters, but led to a sacrifice in crystallinity. The removal of methylene blue (MB) over these samples could be attributed to the dual function of the adsorption and photo-degradation mechanisms. The highest MB removal efficiency of 87.1% was achieved over UiO-66(1.25Ti) under simulated sun-light irradiation.
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Journal of Materials Chemistry A
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2016
·Vol. 5
·期 1
·266-274
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IF 8.262
Man Huang,Kan Mi,Junhao Zhang,Huili Liu,Tingting Yu,Aihua Yuan,Qinghong Kong,Shenglin Xiong
To tackle the issue of the low specific capacity (372 mA h g−1) of graphite as the anode material for lithium-ion batteries (LIBs), an effective and controllable strategy was developed to construct porous bimetallic Co/Zn embedded N-doped carbon (Co–Zn/N–C) polyhedral nanocages via annealing a ZIF-8@ZIF-67 precursor at 800 °C under Ar atmosphere. The results clearly displayed that metallic Co and Zn particles are uniformly dispersed in the carbon matrix. Porous Co–Zn/N–C polyhedral nanocages have a large specific surface area of 349.12 m2 g−1 and contain plenty of micropores and mesopores, which benefit from the carbonization of organic ligands and the catalytic effect of cobalt in the calcination process. As anodes for LIBs, the porous Co–Zn/N–C polyhedral nanocages showed an initial discharge capacity of 809 mA h g−1 and a capacity retention of 702 mA h g−1 after 400 cycles at a current density of 0.2 A g−1. Furthermore, a reversible capacity of 444 mA h g−1 was obtained at a much higher current density of 2 A g−1. The improved electrochemical performance was attributed to the synergistic effect of Zn and Co, the unique porous hollow structure as well as N doping, which relieved the impact of volume changes, maintained perfect electrical conductivity throughout the electrode and enhanced the electrochemical activities of lithium storage.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Ziyi Wang,Changyan Guo,Kefu Wang,Jiang Li,Jide Wang
Upgrading waste PET to prepare metal–organic frameworks (MOF) through chemical recycling provides new ideas and methods for PET recycling treatment and high value-added conversion. In this paper, Cobalt-based metal–organic frameworks (Co-MOF) were prepared from PET by one-pot solvothermal method without adding acids or bases. The prepared Co-MOF was used as a heterogeneous catalyst to catalyze the selective oxidation of ethylbenzene (EB) for the preparation of acetophenone (AP). When only tert-butyl hydroperoxide (TBHP) was used as the oxidizing agent without any additional solvents, 89% EB conversion and 94% AP selectivity were achieved, respectively. Moreover, the catalyst showed excellent stability with no significant deactivation under 5 cycles. In addition, the synthesized Co-MOF-10 also exhibits impressive conversion rates of 96% and 93% in benzyl alcohol and styrene oxidation, respectively. Compared with the Co-MOF prepared by commercial terephthalic acid (BDC), the Co-MOF-10 synthesized via the one-pot method using PET exhibits enhanced cost-effectiveness, environmental sustainability, and superior catalytic performance. The present study establishes a foundation for the conversion of plastic PET into valuable MOF and its subsequent application in C–H bond oxidation.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Hongfei Ma,Yanfang Huang,Jiaan Tang,Wenjuan Wang,Bingbing Liu,Hu Sun,Shuzhen Yang,Guihong Han
Herein, the morphology of a La metal–organic framework (La-MOF) was modified from aggregated granules to a reticular structure possessing a large specific surface area by altering the solvothermal temperature. Thereafter, the La-MOF was applied as an adsorption carrier for fluoride ions removal. Batch adsorption experiments indicated that the morphological structure of La-MOF considerably affects its adsorption performance. The maximum adsorption capacity of the La-MOF-130 comprising the highest dispersion of the reticular structure for fluoride ions was 142.86 mg/g, which was 28.29 % higher than that of the granular-structured La-MOF. Furthermore, La-MOF-130 exhibited an excellent adsorption performance and strong affinity for fluoride ions in a broad pH range (3–10) and a short adsorption time (60 min). The pseudo-second-order kinetic and Langmuir adsorption isotherm models indicated that fluoride ions adsorption of La-MOF was dominated by monomolecular layer chemisorption. Furthermore, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses revealed that the coordination exchange and electrostatic attraction were the interaction mechanism between La-MOF and fluoride ions. Moreover, an efficient solid–liquid separation of the adsorption aggregates (La-MOF-F) and removal of fluoride ions were accomplished via microbubble flotation under the action of the anionic surfactant sodium dodecyl sulfate. The fluoride ions adsorption efficiency was 95.57 % and the solid–liquid separation efficiency was 99.08 %. The research results indicate that the La-MOF carrier adsorption flotation method has broad application prospects in industrial wastewater treatment.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Gang Chen,Ruonan Tian,Qiaolin Li,Tiantian Cao,Huai Tan,Hongtao Guan,Chengjun Dong,Elisabetta Comini
Design sensing materials with core-shell structure is an excellent strategy to achieve high sensing performance toward acetone detection. Herein, MIL-88A(Fe) was fabricated via a hydrothermal route, which renders as a template to fabricate Fe 2 O 3 @In 2 O 3 core-shell spindles structure. Gas sensing results show that the sensor based on Fe 2 O 3 @In 2 O 3 exhibit enhanced response of 193–200 ppm acetone than that of 36 for pristine Fe 2 O 3 at 200 °C. After Pt functionalization, the response of Fe 2 O 3 @In 2 O 3 /Pt to 200 ppm acetone is up to 839 at a reducing working temperature of 180 °C with a good selectivity and long-term stability. A synergistic mechanism originated from the intrinsic merits of Fe 2 O 3 and In 2 O 3 , the 1D core-shell structure, the creation of heterojunction at the interface of Fe 2 O 3 and In 2 O 3 and the creation of Shottky junction at In 2 O 3 and Pt nanoparticles, and the catalytic reaction of Pt holds accountable for the significant improvement in acetone sensing.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Jiayu Lu,Alu Ouyang,Zixin Wang,Yu Li,Xin Qin,Bo Su,Xuejing Huang,Kefeng Li,Jun Luo,Guorong Xu,Ling Fan,Ronghua Jin
The broad utilization of metal–organic frameworks (MOFs) in advanced oxidation processes (AOPs) for wastewater remediation is impeded by toxic ligands, the challenging recovery of catalysts, and the low cycling efficiency of metal redox pairs. In this study, we fabricated a highly efficient and self-degradable bimetallic catalyst with coordinatively unsaturated metal sites (CUMSs) using non-toxic Olsalazine (Olsa) as a ligand to effectively eliminate the antibiotic ofloxacin (OFL). Under optimal conditions, the OFL removal efficiency approached nearly 100 % within 100 min, with the degradation rate of bimetallic MOFs being 4 times than that of monometallic MOFs. The significant enhancement in catalytic performance of the catalyst was ascribed to its reduced charge transfer resistance (Rct), coordinatively unsaturated metal sites, and accelerated cycling of high valence metal to low valence metal, facilitated by the introduction of bimetallic and reducing non-toxic ligands. Moreover, we investigated the effects of H 2 O 2 concentration, catalytic dose, and pH on pollutant degradation. Additionally, results from quenching experiments and electron spin resonance (ESR) tests demonstrated that the three types of free radicals generated during the catalyst activation process played a key role in pollutant degradation.
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