OPTICAL MATERIALS
·
2021
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IF 3.08
Xuyang Li,Zongxue Yu,Liangyan Shao,Xiaofang Feng,Haojie Zeng,Yuchuan Liu,Runxuan Long,Ximei Zhu
In order to effectively solve the two major problems of photocatalyst recovery and membrane fouling , this research combines photocatalyst and membrane separation technology . In this study, the NH 2 -MIL-88B(Fe)/CDs@GO material with good photocatalytic properties was synthesized by hydrothermal method and mechanical stirring, and the photocatalytic membrane was obtained by vacuum filtration. The results show that the NH 2 -MIL-88B(Fe)/CDs@GO membrane can effectively intercept and degrade methylene blue (MB). After 10 cycles, the rejection rate of MB can still reach 99.5%, which is about 2.5 times of pure GO membrane (40%). After 15 min of visible light irradiation, the Flux recovery rate (FRR) of NH 2 -MIL-88B(Fe)/CDs@GO membrane can reach 95%, and the antifouling performance is excellent. In this study, the composite photocatalytic membrane shows excellent stability, photocatalytic performance and self-cleaning property, which is conducive to widening the application prospect of wastewater treatment .
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yu Ding,Yuyang Hu,Yangyang Zhao,Yaru Li,Ziteng Huang,Soufian Chakir,Yongfei Xu,Daosheng Sun,Songqin Liu,Huanting Wang,Xianbiao Wang
Indium, copper, and mercury are important raw materials in the electronics industry and often coexist in factory wastewater. Therefore, the development of a highly sensitive and selective method for the simultaneous detection of these heavy metal ions is of great significance for water quality monitoring and environmental protection. Herein, we report a NH2-MIL-53 fluorescent probe for the simultaneous detection of trace In3+, Cu2+, and Hg2+ in water. After a low-temperature NH3 plasma tailoring treatment for grafting electron-donor amine groups, the obtained NH2-MIL-53-M exhibited enhanced fluorescence emission intensity (∼6 times) coupled with selective adsorption of In3+, Cu2+, and Hg2+. This quenched the NH2-MIL-53-M fluorescence and allowed to significantly increase the selectivity and sensitivity for detection of In3+, Cu2+, and Hg2+. The fluorescence quenching constant (Ksv) values were 2.23 × 105, 1.00 × 105, and 2.74 × 104 M–1, while the limit of detection (LODs) values were 0.06, 0.14, and 0.53 μM, for In3+, Cu2+, and Hg2+, respectively. The concentrations of In3+, Cu2+, and Hg2+ in real environmental samples could be determined by addition of appropriate masking agents, and the recoveries were within the range of 94–110%. This study not only supplied a strategy for constructing a highly sensitive and selective fluorescent probe but also established a platform for simultaneous detection of multiple heavy metal ions in water.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Chen Li,Chuncai Zhou,David French,Ian T. Graham,Zixuan Wang,Yunfei Li,Feng Wang,Guijian Liu
As strategic emerging industries represented by clean energy technologies develop rapidly, gallium (Ga), one of the critical elements due to its use in these technologies and limited supply, has attracted worldwide attention. The discovery of appropriate materials to adsorb Ga is crucial for improving the utilization of Ga resources. With the goal to recover Ga ions more efficiently and selectively, carbon nanotubes (CNTs) and amino-functionalized MIL-53 series metal–organic skeletons were hydrothermally synthesized into CNT/NH2-MIL-53(Fe) composite adsorbents. The composite's morphology, structure, chemistry and other physicochemical features were characterized, and the adsorption conditions including pH, initial Ga concentration, along with adsorbent dosage were optimized. The outcomes suggest that 2-CNT/NH2-MIL-53(Fe) performs better than the unmodified material in adsorption, and the theoretical maximum adsorption amount of Ga is 1483.8 mg g−1. The adsorption exhibited a single layer chemisorption with an endothermic spontaneous reaction. The adsorption mechanism for Ga onto 2-CNT/NH2-MIL-53(Fe) was mainly via ion exchange and chelation, accompanied by hydrogen bond interaction. The outstanding adsorption capacity and reproducibility using CNT/NH2-MIL-53(Fe) composites provide a novel method for adsorbing Ga from aqueous solutions.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shuaitian Jia,Zan Chen,Yinhui Li,Claudia Li,Cuijia Duan,Kang Hui Lim,Sibudjing Kawi
The disposal of waste lithium batteries , especially waste separators, has always been a problem, incineration and burial will cause environmental pollution, therefore, the development of degradable and high-performance separators has become an important challenge. Herein, UiO-66-NH 2 particles were successfully anchored onto bacterial cellulose (BC) separators by epichlorohydrin (ECH) as a crosslinker, then a BC/UiO-66-NH 2 composite separator was prepared by vacuum filtration. The ammonia groups (−NH 2 ) from UiO-66-NH 2 can form hydrogen bonds with PF 6 − in the electrolyte, promoting lithium-ion transference. Additionally, UiO-66-NH 2 can store the electrolyte and tune the porosity of the separator. The lithium ion migration number (0.62) of the battery assembled with BC/UiO-66-NH 2 composite separator increased by 50 % compared to the battery assembled with commercial PP separator (0.45). The discharge specific capacity of the battery assembled with BC/UIO-66-NH 2 composite separator after 50 charge and discharge cycles is 145.4 mAh/g, which is higher than the average discharge specific capacity of 114.3 mAh/g of the battery assembled with PP separator. When the current density is 2C, the minimum discharge capacity of the battery assembled with BC/UiO-66-NH 2 composite separator is 85.3 mAh/g. The electrochemical performance of the BC/UiO-66-NH 2 composite separator is significantly better than that of the commercial PP separator. In addition, -NH 2 can offer a nitrogen source to facilitate degradation of the BC separators, whereby the BC/UiO-66-NH 2 composite separator could be completely degraded in 15 days.
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TALANTA
·
2025
·
IF 6.1
Mengting Liu,Zuncai Gu,Lu Qian,Kawtar Ettayri,Tao Deng,Chenhao Zhang,Jing Qian,Xingyi Huang,Chengquan Wang
Oxytetracycline (OTC), a broad class of antibacterial medication, has been widely utilized in poultry husbandry and fish farming. However, the presence of OTC residues in the food has become a matter of great concern. These residues have the potential to induce the emergence and spread of bacterial resistance, which can have far-reaching consequences for public health. In this work, we focused on the comparison of the quenching efficiency of UiO-66 and its amino group-modified counterpart UiO-66-NH 2 , towards the fluorescence of nitrogen-doped graphene quantum dots (NGQDs) labeled aptamer (NGQDs-apt). It was found that UiO-66-NH 2 demonstrated a more potent fluorescence quenching ability towards NGQDs-apt, as high as 98.8 %, compared to 69.7 % for UiO-66 without amino functionalization. This enhanced performance is attributed to the improved interaction between the amino groups on UiO-66-NH 2 and the NGQDs-apt, facilitating more effective electron transfer. Consequently, UiO-66-NH 2 was selected as the optimal quencher for the development of a highly sensitive aptasensor. This aptasensor demonstrates a quantitative detection range for OTC spanning from 0.001 to 200 μM with an exceptionally low detection limit of 0.25 nM, showing simplicity, accuracy, stability and great potential for antibiotic residue detection in food samples. This work addresses the urgent need to develop reliable methods for detecting OTC residues in food due to the potential of OTC to trigger bacterial resistance, which is crucial for food safety and public health.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
An-qi Tang,Xuechao Xu,Cao-wei Chen,Mengyuan Tan,Lu Gao,Zhen-quan Yang
Enterobacter hormaechei , A zoonotic pathogen with escalating prevalence in global food sources, severely jeopardizes food safety, necessitating the development of high-performance detection methods. Herein, a novel colorimetric detection strategy integrating phages and nanozymes was proposed for foodborne E. hormaechei . Initially, four homologous phages (EhpYZU05, EhpYZU08, EhpYZU9–1 and EhpYZU10), which were isolated using E. hormaechei YZU05 as the host bacterium, were modified on the surface of NH 2 -MIL-88B(Fe) to fabricate four phage@NH 2 -MIL-88B(Fe) nanozymes. These nanozymes exhibit peroxidase-like activity, catalyzing 3,3′,5,5′-tetramethylbenzidine (TMB) chromogenic reaction in presence of H 2 O 2 . With introduction of multiple host or non-host E. hormaechei strains, TMB chromogenic reaction catalyzed by phage@NH 2 -MIL-88B(Fe) nanozymes can be specifically inhibited. This inhibition occurs due to the specific phage adsorption of phage@NH 2 -MIL-88B(Fe) nanozymes towards these host or non-host E. hormaechei strains, indirectly blocking their catalytic sites. Leveraging this principle, colorimetric broad-spectrum detection of E. hormaechei was achieved. Additionally, this method demonstrated reliable recoveries (96.7 % ~ 103.3 %) when applied to detect real food matrices, highlighting its high reliability in practical scenarios. This approach not only clarifies the intrinsic mechanism of phage-modified nanozymes for target bacteria detection but also provides a robust and reliable method for early pathogen detection, thereby significantly contributing to food safety enhancement
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jin Chai,Chunpeng Liu,Hongtian Yang,Yide Han,Yufeng Liu,Ying Zhang,Xia Zhang
The bifunctions of fluorescence activity and peroxidase mimics were well-integrated by a hemin chloride-modified Zr-based metal–organic framework (Hemin@NH2-UiO-66), which can catalyze the oxidation of o-phenylenediamine (OPD) to generate 2,3-diaminophenazine (DAP), presenting typical peroxidase mimic properties. The influence of the introduction of hemin chloride upon the enhanced peroxidase mimic activity was clarified, and the nanozyme catalytic parameters were optimized. Interestingly, the oxidized product of DAP presents strong fluorescence emission at 564 nm; combining it with the intrinsic fluorescence emission of NH2-UiO-66 at 452 nm, a dual-emission system could be built up by the resulting Hemin@NH2-UiO-66 in the presence of definite OPD and H2O2. Moreover, the fluorescence quenching effect (564 nm) was observed by adding l-cysteine (l-Cys); based on that, a straight-line dependence of the fluorescence intensity ratio (I452/I564) upon the concentrations of l-Cys was established. The detection limit was 0.21 μmol, and the analytical selectivity for l-Cys was also demonstrated. The work highlights the idea of combining the intrinsic fluorescence property and nanozyme catalytic activity in a functional MOF, and its special usability is found in the ratiometric fluorescence sensing analyses.
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Desalination and Water Treatment
·
2024
·
IF 1
Tian Tian,Yannan Jia,Jianguo Wu,Jinlong Zhao,Kai Xu,Zijie Wang,Zheng Wang
With the increasing threat antimony (Sb) pollution poses to the environment, its removal from water is becoming increasingly important. Accordingly, metal-organic frameworks (MOFs) are garnering increasing research attention owing to their excellent performance as adsorbents. Here, the MOF MIL-101(Cr)-NH 2 was prepared directly by solvothermal synthesis. Sb(III) adsorption using MIL- 101(Cr)-NH 2 was evaluated systematically at varying adsorbent dosages and pHs. And the adsorption kinetics, isotherms, and thermodynamics were explored by altering the contact time, initial Sb(III) concentration, and temperature, respectively. The results revealed that Sb(III) was adsorbed onto MIL-101(Cr)-NH 2 very quickly, even at low antimony concentrations. The maximum Sb(III) adsorption capacity of MIL-101-NH 2 is 83.61 mg g -1 . In the presence of coexisting ion (NO 3 - ), the amount of Sb(III) adsorbed was slightly increased, which may be due to the formation of an inner-sphere complex. The Box–Behnken method was used to design and optimize a response surface with reference to three main influencing factors, that is, dosage, pH, and temperature, so as to obtain a multivariate quadratic model of adsorption behavior and identify the optimal adsorption conditions. Finally, a preliminary economic analysis of the synthetic material was carried out.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jiaojiao Cao,Chengbin Guo,Zhenyu Chen
A series of MOF-5 @BTA-X (X = -CH 3 /-NH 2 /-CO(CH 2 ) 6 CH 3 ) anticorrosion composites was fabricated through loading benzotriazole derivatives in a metal–organic framework (i.e., MOF-5). Their crystal structures and morphologies were characterized by single-crystal X-ray diffraction analysis, Fourier transform infrared spectroscopy , and transmission electron microscopy . The loading–releasing mechanisms between MOF-5 and BTA derivatives were revealed by experiments and theoretical calculations. Their anticorrosion performance for copper was also evaluated by electrochemical impedance spectroscopy and potentiodynamic polarization in 0.5 M NaCl. The corrosion product was analyzed via scanning electron microscopy and X-ray photoelectron spectroscopy. The results indicated that the loading capacities followed the order of MOF-5 @BTA-NH 2 > MOF-5 @BTA-CH 3 > MOF-5 @BTA-CO(CH 2 ) 6 CH 3 . The release rates followed the order of MOF-5 @BTA-NH 2 < MOF-5 @BTA-CH 3 < MOF-5 @BTA-CO(CH 2 ) 6 CH 3 . Furthermore, the results of theoretical calculations indicated that the differences in loading capacities depended on the polarity of the functional group. Meanwhile, the strong binding force decreased the release rate.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.7
Chaofeng Zhang,Yinhui Yi,Yong Zhao,Gangbing Zhu
This study prepared UiO-66-NH2 MOFs embedded with Ru-tris(2,2′-bipyridyl)(II) hybrids as a nanozyme (designated as Ru/UiO-66-NH2) to propose a bioenzyme-free homogeneous electrochemical (HEC) sensing strategy for detecting organophosphorus pesticides (OPs). Experimental investigation coupled with density functional theory calculation demonstrated that the Ru incorporation significantly amplifies the peroxidase-like (POD-like) activity of UiO-66-NH2 MOFs and that the Ru/UiO-66-NH2 nanozyme exhibits selective responsiveness to coordinate with the OP molecules. Upon OP exposure, the specifical coordination between OPs and MOF structure effectively inhibits the nanozyme’s activity. Utilizing o-phenylenediamine as the catalytic substrate and glyphosate as a model of OPs, the optimized HEC sensor achieves an extensive linear detection range (0.5–10,000 ng/mL) and a low detection limit of 0.13 ng/mL as well as satisfactory recoveries in the real samples of tomato extract and water. It is expected that this innovative bioenzyme-free HEC sensing strategy represents a promising advancement for practical OP residue analysis with potential applications in various fields.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 3.9
Dong Mingming,Yang Shuyong,Wang Anshun,Zhou Peng,Huang Zewen,Tu Shenghui
A ternary Z-scheme heterojunction photocatalyst, BiOBr/TiO 2 /NH 2 -UiO-66(Zr), was constructed to enhance the visible-light-driven degradation of tetracycline (TC). This composite material was synthesized via hydrothermal and in situ growth methods, and its microstructure and properties were analyzed through a series of systematic characterizations. The introduction of NH 2 -UiO-66 significantly increased the specific surface area and visible light absorption while promoting the separation and transport of photogenerated charge carriers. Under visible light irradiation, the optimal composite (BTU-2) achieved a TC degradation rate of 96.3% within 80 min, with a reaction rate constant 9.41, 12.03, and 8.58 times higher than those of pure BiOBr, TiO 2 nanowires (NWs), and NH 2 -UiO-66, respectively. Trapping experiments and electron paramagnetic resonance (EPR) analysis confirmed that h + and ‧O 2 − were the dominant active species. Liquid chromatography–mass spectrometry (LC–MS) further elucidated the possible TC degradation pathways. This work provides a feasible strategy for designing efficient visible-light-responsive photocatalysts for antibiotic wastewater treatment. Graphical abstract
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CRYSTAL GROWTH & DESIGN
·
2026
·Vol. 26
·期 16
·6407-6421
·
IF 3.6
Zhao Tian,Peng Shilin,Li Yongjie,Chen Huayu,Yu Jiangrong,Shen Ling,Janiak Christoph,Chen Ying,Chen Yi
Achieving uniform zinc deposition is crucial for high-performance
aqueous zinc-ion batteries, yet it remains a significant challenge.
While functional separators based on metal–organic frameworks
(MOFs) like UiO-66-NH 2 offer a promising route to regulate
ion flux, their effectiveness is often hampered by the energy-intensive
synthesis of MOFs and their poor dispersion within polymer matrices.
Herein, we report a rapid, room-temperature ultrasound-assisted synthesis
that yields UiO-66-NH 2 with a unique surface-fused morphology
and a hierarchical pore system within just 1 h. Unlike its conventional
counterpart with a well-defined octahedral shape, this ultrasound-induced
MOF (U-UN) forms a homogeneous and tightly integrated composite with
cellulose nanofibers, constructing a separator with optimized ion-transport
channels and interfacial stability. The U-UN-based separator demonstrates
superior ionic conductivity and Zn 2+ transference number,
effectively guiding the preferential growth of Zn along the (002)
plane. Consequently, a Zn||Zn symmetric cell equipped with this separator
achieves an ultrastable cycling life exceeding 1180 h, and a Zn||MnO 2 full cell retains nearly 100% capacity after 600 cycles at
1 A g –1 . This work not only presents a green and
efficient synthesis strategy for advanced MOFs but also provides fundamental
insights into the design of functional separators through microstructure
engineering for long-lasting metal batteries.
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