FOOD CHEMISTRY
·
2025
·
IF 9.8
Yingkun Shi,Fujia Dong,Argenis Rodas-Gonzalez,Guangxian Wang,Lingfan Yang,Sichun Chen,Hao-Bo Zheng,Songlei Wang
Heavy metal ions (HMIs) pollution has become a significant food safety concern owing to rapid urbanization and industrialization. In this study, a hypersensitive electrochemical sensor based on amino-functionalized MXene and bimetallic atom MOFs nanocomposites (MXene-NH 2 @CeFe-MOF-NH 2 ) was developed and applied for the detection of HMIs. MXene-NH 2 @CeFe-MOF-NH 2 nanocomposites were obtained by incubating MXene@CeFe-MOF prepared by hydrothermal and self-assembly methods in APTES to endow them with a large amount of surface amine functional groups. The introduction of -NH 2 could lead to a coordination effect between the nanocomposites and HMIs, promoting the enrichment efficiency of HMIs on the surface of the working electrode. The sensing platform demonstrated excellent detection performance, with limit of detection (LOD) values of 0.69 nM, 0.95 nM, and 0.33 nM for Cd 2+ , Pb 2+ and Hg 2+ , respectively, which were far below the maximum residue levels specified by the Chinese standards. Furthermore, the sensor was employed to analyze representative real samples (fish, whole milk, rice, and corn) to simulate an accurate analysis in complex scenarios and successfully detect the three HMIs simultaneously.
研究领域:
食品安全
·
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 2.892
Juan Han,Li Wang,Yun Wang,Jian Dong,Xu Tang,Liang Ni,Lei Wang
A geometrically symmetric four – arm dendritic polymer 4-arm-PEG-NH 2 was employed to modify on the surface of Fe 3 O 4 as support for cellulase immobilization. Glutaraldehyde was used as a coupling agent of this magnetic support to covalently immobilize cellulase. The morphology and properties of the synthesized magnetic material were characterized by Fourier transform infrared (FT-IR) spectroscopy, vibrating-sample magnetometer (VSM), thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The properties of immobilized enzyme such as the optimum temperature and pH, Michaelis constant, thermal stability, reusability and storage stability were investigated. The loading capacity of cellulase was 132 mg/g. Compared with free cellulase, immobilized cellulase showed wider pH and temperature ranges, higher operational stability and good storage stability. Besides, the results of hydrolysis filter paper and microcrystalline cellulose showed that the catalytic effect of immobilized cellulase on the free cellulase was increased by about 76%.
研究领域:
生物化学
·
材料科学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Bolin Ma,Guanghui Chen,Lingling Zhou,Chengyang Ni,Xinyu Sun,Lei Zhang,Xinguo Xi,Lanqin Tang,Yong Zhou
The development of highly efficient photocatalysts for CO2 reduction remains a critical challenge in achieving sustainable energy conversion. In this study, we report the synthesis of a UiO66-NH2@In2O3, integrating UiO66-NH2 metal organic frameworks (MOFs) with indium oxide (In2O3) nanoparticles, forming a robust heterostructure. Characterization results demonstrated that calcination at 250 °C for 4 hours yielded a heterostructure with indium uniformly incorporated, as confirmed by XRD, SEM, TEM and ICP-OES analyses. XPS studies revealed significant electronic interactions between UiO66-NH2 and In2O3, including shifts in binding energies of indium and zirconium, indicative of chemical bonding. This heterostructure facilitated enhanced charge separation and transfer, as evidenced by photocurrent measurements, leading to superior photocatalytic CO2 reduction performance. Under light irradiation, UiO66-NH2@In2O3 achieved a CO production rate of 83.68 μmol g−1 during the first hour and a cumulative yield of 485.08 μmol g−1 after 7 hours, significantly outperforming pristine UiO66-NH2 and In2O3. The superior activity is attributed to the large surface area of UiO66-NH2, facilitating CO2 adsorption, and the heterojunction formation with In2O3, enhancing charge carrier dynamics. These findings highlight the synergistic effects of UiO66-NH2 and In2O3, providing insights into the design of advanced photocatalysts for environmental and energy applications.
研究领域:
材料科学
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环境科学
·
能源科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Zhiren Zhou,Lina Zou,Ping Zhang,Chunmei Li,Ye Zhu,Huanyu Ren,Zheng Li,Huiru Niu,Hao Liao,Xiaojing Zhang,Shanshan An,Fei Ren,Xiuhong Ge,Lang Cheng,Feiyan Yang,Hongzhi Pan,Shengzhong Rong,Dong Chang,Hongkun Ma
Survivin serves as a crucial biomarker for bladder cancer, so exploring the detection method is essential. Therefore, a sensitive ratiometric electrochemical immunosensor was developed. In brief, a double-layered amino graphene oxide (NH 2 -GO) sandwich enhanced by Fe-Ni@Ti 3 C 2 T x (NH 2 -GO/Fe-Ni@Ti 3 C 2 T x /NH 2 -GO) significantly amplified the detection signal. ferrocene@Au nanoparticles (Fc@AuNPs) provided a reference signal, and Ab 1 was anchored via an Au-N bond. Moreover, AuPt-methylene blue (AuPt-MB) served not only as a secondary signal but also anchored Ab 2 through Au-NH 2 and Pt-NH 2 bonds. Black phosphorus nanoplates (BPNPs) improved conductivity and provided additional binding sites for AuPt-MB. The immunosensor exhibited a broad detection range (0.001~1000 ng/mL) and a low detection limit (0.00065 ng/mL), facilitating successful survivin detection in human urine samples with promising clinical analysis applications.
研究领域:
生物医学工程
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分析化学
·
肿瘤学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Yanjia Zhou,Xiao-Dong Tang,Jingjing Li,Da-Yong Qing,Hong Wang
MIL-101(Cr) and MIL-100(Fe) are both representative MIL-type Metal-Organic-Frameworks (MOFs) materials, renowned for their large specific surface areas and size-tunable characteristics, making them suitable candidates for Li+ extraction from lithium-containing solvent. By introducing -NH2 functional groups and using LiNO3 as both a template and mineralizer, the functionalized MOF materials Li/NH2/MIL-101(Cr) and Li/NH2/MIL-100(Fe) were synthesized. Following modification, their Li+ adsorption capacities were increased, reaching 43.58 and 38.22 mg/g, respectively. The dosage of mineralizer, initial Li+ concentration, adsorbent dosage, solution pH value, and temperature all have an impact on the adsorption capacity of adsorbents. In addition, through the establishment of the pseudo-first-order kinetic model, pseudo-second-order kinetic model, as well as Langmuir and Freundlich thermodynamic models, it can be known that the adsorption of the materials belonged to monolayer chemisorption, and the adsorption process was exothermic. Furthermore, both adsorbents showed good reusability, retaining over 85% of their initial adsorption capacity after four adsorption-desorption cycles, highlighting their practical applicability in lithium recovery processes. In Mg-Li mixed solution systems, both materials exhibited exceptional Li+ selectivity. At a low Mg2+/Li+ ratio of 3, the separation factor (α) exceeded 80; even at a high Mg2+/Li+ ratio of 10, α remained near 50. Additionally, in systems with coexistence of multiple interfering ions, the distribution coefficient (Kd) followed the order: Li+ ≫ Mg2+ > Ca2+ > Na+ > K+. In the mixed systems, Li/NH2/MIL-101(Cr) and Li/NH2/MIL-100(Fe) exhibited certain separation effect for Li+ against competing cations.
研究领域:
材料科学
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环境科学
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化学工程
·
无机化学
·
分离技术
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产品关联
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2020
·
IF 4.872
Sumei Li,Fan Feng,Sha Chen,Xiaolei Zhang,Yixuan Liang,Saisai Shan
MOFs are usually used as efficient adsorbents to remove specific pollutants in water. However, because of their poor water stability relatively small particle size, their application in adsorbing and removing pollutants from water is limited. In this paper, with nitrile rubber sponge as the substrate, UiO-66-NH 2 /sponge composites were firstly in-situ synthesized and systematically evaluated UiO-66-NH 2 as an adsorbent to remove 2,4-dichlorophenoxyacetic acid from water. This composite could not only remain the adsorption capacity for 2,4-dichlorophenoxyacetic acid of UiO-66-NH 2 , but also was much more convenient for separation after the adsorption compared to UiO-66-NH 2 . In addition, the mechanism of the adsorption of UiO-66-NH 2 for 2,4-dichlorophenoxyacetic acid were discussed in detail. Electrostatic interaction between UiO-66-NH 2 and 2,4-dichlorophenoxyacetic acid was the main adsorption mechanism. The adsorption was mainly suitable for Langmuir isotherm models, and its maximum adsorption capacity of 2,4-dichlorophenoxyacetic acid was 72.99 mg g −1 .
研究领域:
环境科学
·
化学工程
·
材料科学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yanan Huang,Xiaotong Wang,Bodan Luo,Peng Jin,Yonghua Zheng,Changliang Xu,Zhengguo Wu
Effective control of wound bleeding and sustained promotion of wound healing remain a major challenge for hemostatic materials. In this study, the hemostatic sponge with controllable antibacterial and adjustable continuous promotion of wound healing (CMN Cu) was prepared by chitosan, aminated MXene and copper ion . Interestingly, the internal topological point-line-surface interaction endowed the CMN-Cu sponge longitudinal staggered tubular porous microstructure, combined with the lipophilic properties obtained by modified MXene, which greatly improved its flexibility, wet elasticity and blood enrichment capacity. In addition, the sponge achieved controlled release of active ingredients, which made it present highly effective antibacterial activity and long-lasting ability to promote wound healing. In vitro and in vivo experiments confirmed that CMN-Cu sponge presented high-efficient hemostatic performance. Last but not least, a series of cell experiments showed that the CMN-Cu sponge had excellent safety as a hemostatic material.
研究领域:
生物医学材料
·
创伤修复
·
药物释放系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2024
·
IF 4.4
Xiaohang Lin,Yuzhu Xiong,Fuping Dong
Environmental pollution of phosphorus is becoming increasingly concerning, and phosphate removal from water has become an important issue for controlling eutrophication. Modified metal–organic framework (MOF) materials, such as UiO-66-NH 2 , are promising adsorbents for phosphate removal in aquatic environments due to their high specific surface area, high porosity, and open active metal sites. In this study, a millimeter-sized alginate/UiO-66-NH 2 composite hydrogel modified by polyethyleneimine (UiO-66-NH 2 /SA@PEI) was prepared. The entrapping of UiO-66-NH 2 in the alginate microspheres and its modification with PEI facilitate easy separation in addition to enhanced adsorption properties. The materials were characterized by SEM, FTIR, XRD, and BET. Static, dynamic, and cyclic adsorption experiments were conducted under different pH, temperature, adsorbent dosage, and initial concentration conditions to assess the phosphate adsorption ability of UiO-66-NH 2 /SA@PEI. Under optimal conditions of 65 °C and pH = 2, 0.05 g UiO-66-NH 2 /SA@PEI adsorbed 68.75 mg/g, and the adsorption rate remained at 99% after five cycles of UiO-66-NH 2 /SA@PEI. These results suggest that UiO-66-NH 2 /SA@PEI composite materials can be used as an effective adsorbent for phosphate removal from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Carbon Capture Science & Technology
·
2023
·
IF 0
Wufeng Wu,Jiang Fan,Dongyue Wang,Yali Zhao,Xinglei Zhao,Yanying Wei
MOF membranes exhibit impressive performance in gas separation due to their large surface area, controllable pore size and unique affinity. Here, the ultrathin UiO-66-NH 2 polycrystalline membranes with thickness of ∼320 nm are successfully prepared within 1 h using a combination of ultrasound-assisted and microwave synthesis strategies. During the reaction, high-density small MOF nuclei are produced by sodium formate ultrasound-assisted, which act as sufficient nucleation sites for heterogeneous nucleation during membrane growth, aiming for development of a continuous MOF membrane on the porous substrate. The obtained UiO-66-NH 2 membrane shows an ideal CO 2 /CH 4 selectivity of 40 due to the enhanced the interaction between CO 2 molecules and the membrane. Moreover, the narrowed pore structure further hinders the diffusion of larger-sized molecules owing to -NH 2 occupying the pore channels, resulting in elevated CO 2 /CH 4 selectivity. Compared to many other MOF membranes, the UiO-66-NH 2 polycrystalline membranes exhibit a well balance of gas permeance and CO 2 /CH 4 selectivity, which presents a new route for CO 2 capture.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
CRYSTENGCOMM
·
2024
·
IF 2.6
Hao He,Xiao-kai Liu,Bai-yun Zhao,Li-juan Zhou,Xuan Zhao,Chen-xu Wang,Ji-yuan Zhang,Yuan-fang Zhang,Li Wang
In this study, UiO-66-NH2 nanoparticles were synthesized via a hydrothermal method, using acetic acid and hydrochloric acid as modulators to optimize the specific surface area and pore width. Oxytetracycline (OTC) was chosen as the test compound to evaluate the adsorption efficiency of UiO-66-NH2.The material was thoroughly characterized under varying conditions, and the adsorption mechanism was systematically explored through adsorption kinetics, isotherms, and thermodynamic analyses. The results demonstrated that UiO-66-NH2 exhibited a high OTC adsorption capacity, achieving a maximum of 312.5 mg g−1 under optimal conditions. XRD, TGA, and BET analyses revealed that acetic acid and hydrochloric acid significantly improved the crystallinity and thermal stability of UiO-66-NH2, increasing the specific surface area from 8.023 m2 g−1 to 998.663 m2 g−1 and reducing the pore width from 18.783 nm to 2.129 nm. FTIR, XPS, adsorption kinetics, and isotherm studies indicated that the main forces driving OTC adsorption by CMC-Fe were hydrogen bonding, π–π stacking, weak electrostatic interactions, and pore filling. Cyclic adsorption experiments further demonstrated the excellent reusability of UiO-66-NH2. In summary, the use of acetic acid and hydrochloric acid significantly increased the specific surface area of UiO-66-NH2, exposing more adsorption sites and playing a critical role in pollutant removal.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiaoxia Ye,Zhihong Zheng,Jinwei Zhu,Jie Chen,Jianfei Zhou,Bi Shi
Adsorptive removal of mercury ion from wastewater has become a hot topic due to the toxicity and persistence; acquiring adsorbent materials with high-capacity, rapid-kinetic, super-selective while low-cost features are highly demanded. Herein, based on the full functionality of collagen fiber (CF) from the leather waste, we proposed an innovative synthetic approach through exploiting amino-functionalized ZIF-7 (ZIF-7-NH 2 ) as functional groups to facilely in-situ incorporate with CF, affording low-cost but effective adsorbent materials of CF/ZIF-7-NH 2 composite maximizing both functions of CF and ZIF-7-NH 2 in the Hg(II) capture. Remarkably, it exhibits an ultra-high capacity as high as 909.09 mg g - 1 , fast kinetics that could remove 99.01 % of 200 mg·L -1 within 20 min, and significant selectivity of S Hg/M ( K d Hg / K d M ) as large as 522–1017 over Mg 2+ , K + , Ca 2+ , Cd 2+ , and Mn 2+ . We understand such an impressive adsorption is contributed by the synergistic action between functional groups including on the CF and ZIF-7-NH 2 . This study offers an effective method for removing heavy metal ions, achieving efficient removal of Hg(II) ions for pollution control, and promoting the reuse of waste CF to reduce waste accumulation in various aspects.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 2
·1-18
·
IF 2.4
Xu Lingling,Pan Xiaomei,Gao Lijing,Wei Ruiping,Li Jihang,Wen Xiu,Li Yuanzhuang,Xiao Guomin
UiO–66–NH 2 (Ti/Zr) modified by Ti metal oxide (TiO 2 ) was used to catalyze the hydrolysis of cellulose to prepare 5-HMF. Under the optimal reaction conditions of H 2 O(NaCl)/THF(1/4 mL), 190 °C, 2 h and 50 mg UNT-3(Ti/Zr) (TiO 2 and UiO–66–NH 2 with mass of 1.5 and 0.1 g, respectively), the yield of 5-hydroxymethylfurfural reached 59.88%. UiO–66–NH 2 (Ti/Zr) nanocomposites with different mass ratios were successfully prepared by simple solvent evaporation method. SEM and TEM have shown that the modified UiO–66–NH 2 (Ti/Zr) are wrapped into sphere by TiO 2 densely attached to the surface of UiO–66–NH 2 , which provides favorable conditions for the uniform dispersion of TiO 2 and coordination of the Lewis acidic site of UiO–66–NH 2 . NH 3 –TPD results confirmed the existence of super-strong, strong, middle and weak acid sites in UiO–66–NH 2 (Ti/Zr), and Py-FTIR confirmed the existence of Brønsted and Lewis acids. After four cycles, the yield of 5-HMF and FUR decreased slightly from 59.88 to 51.89% and 9.11 to 7.66%, respectively, and the yield of 5-HMF could still remain above 50%. The results showed that the modified composite treatment of TiO 2 with rich Lewis acid/base and UiO–66–NH 2 could provide a certain idea for the extensive application of biomass research in the future. Graphic
研究领域:
材料科学
·
催化化学
·
生物质能研究
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）