Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xiaoya Zhao,Jilin Zhang,Zi Dai,Yunyun Lei,Xiaoxun Liu,Guixia Liu
Excess fluoride in drinking water from groundwater can cause dental and skeletal fluorosis affecting millions of people worldwide. Adsorption is an appealing strategy for defluoridation due to its simple operation and environmental friendliness. However, conventional adsorbents exhibit low adsorption capacity because few exposed active sites. In this work, La anchored Zr-based metal-organic framework (La-UiO-66-(COOH) 2 ) adsorbent with dual-metal sites was designed and synthesized to remove fluoride effectively. The doping of La(III) using uncoordinated carboxyl group of UiO-66-(COOH) 2 increased the adsorption capacity. The morphology, composition, structure, surface area, and thermal stability of adsorbent were carefully characterized by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectrometer (EDX), fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS) techniques. The adsorbent is a polyhedral shape with aggregated and smaller crystalline particles and La is uniformly distributed over the adsorbent, favoring the effective adsorption of fluoride. La-UiO-66-(COOH) 2 showed excellent adsorption performance in a wide pH range of 3–9, and the maximum adsorption capacity was 57.23 mg g −1 . The fluoride removal rate of as-prepared adsorbent reached as high as 87 % within 5 min. The adsorption process conformed to the pseudo-second-order equation model and the Freundlich isotherm model. Thermodynamic research indicated that the adsorption process was spontaneous and endothermic. After four adsorption-desorption cycles, the fluoride removal rate of the adsorbent was still retained at 79.7%. The design of dual-metal site adsorbents provides a potential strategy for highly efficient removal of fluoride.
研究领域:
环境科学
·
材料科学
·
水处理
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DOI
高影响因子
ACS Applied Polymer Materials
·
2021
·
IF 4.089
Xu Yang,Baolong Wang,Di Sha,Yonggang Liu,Zhi Liu,Kai Shi,Wei Liu,Cong Yu,Xiangling Ji
Carboxylated poly(vinyl alcohol) (PVA-COOH) is prepared by modifying PVA with succinic anhydride. Then, poly(hexamethylene guanidine (PHMG) as a cross-linker and gallic acid (GA) as an antioxidant are added to obtain PVA-based composite hydrogel films (PVA-COOH-PHMG/GA). The as-prepared PVA-based composite films show hydrophilic surfaces, high swelling ratios of 600–700%, low water solubility for PVA-COOH-PHMG samples (about 10%), and good mechanical properties. Importantly, when the initial bacterial concentration is 107 CFU/mL, the antibacterial rate of PVA-based composite films against Escherichia coli and Staphylococcus aureus can reach 99.999%. When the initial bacterial concentration is 108 CFU/mL, the antibacterial rates of these composite films against E. coli and S. aureus can be 99.9999% and 99.988%, respectively. The antibacterial mechanism is also discussed via a live/dead bacteria assay. The cytotoxicity test reveals that the resultant PVA-COOH-PHMG composite hydrogel films without GA have good biocompatibility toward L929 cells, but PVA-COOH-PHMG/GA composite films with addition of GA decrease the cell viability. Interestingly, the PVA-COOH-PHMG/GA composite hydrogel films can scavenge 70% of 1,1-diphenyl-2-picryhydrazyl (DPPH) free radical because of the release of GA, indicating an excellent antioxidant efficiency. It is anticipated that the resultant PVA-based composite hydrogel films with an adequate amount of GA not only possess excellent antibacterial properties but also exhibit a good antioxidant activity. Therefore, they show potential for biomedical field applications as wound dressings.
研究领域:
材料科学
·
生物材料
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生物医学工程
·
药学
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Xiaoyan Tang,Manjia Chen,Muzi Li,Huanping Liu,Hao Tang,Yang Yang
Micro(nano)plastics are ubiquitous in the environment. Among the microplastics, imidacloprid (IMI) concentration has been increasing in some intensive agricultural regions, thus receiving increased attention. However, only a few studies have investigated the interaction of nanoplastics (polystyrene (PS)) and IMI in vegetable crops. We studied the effects of positively (PS-NH 2 ) and negatively (PS-COOH) charged nanoplastics on the uptake, translocation, and degradation of IMI in Chinese flowering cabbage grown in Hoagland solution for 28 days. PS-NH 2 co-exposure with IMI inhibited plant growth, resulting in decreased plant weight, height, and root length. Translocation of IMI from the roots to the shoots was significantly lower in the presence of PS-NH 2 , whereas PS-COOH accelerated the accumulation and translocation of IMI in plants, thus potentially affecting IMI metabolism in plants. Notably, IMI-NTG and 5-OH-IMI were the two dominant metabolites. PS-NH 2 co-exposure with IMI induced significant oxidation stress and considerably affected the activities of superoxide dismutase (SOD) and peroxidase (POD), indicating that the antioxidant defense system was the main mechanism for reducing oxidative damage. Notably, both positively and negatively charged nanoplastics can accumulate in Chinese flowering cabbage. Plants in the PS-COOH alone treatment group had the highest concentration of nanoplastics in both roots and shoots. The accumulation of nanoplastics, IMI, and its metabolites in plants raises concerns about their combined potential toxicity because it compromises food safety.
研究领域:
环境科学
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农业
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植物科学
·
毒理学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Lei Sun,Meng Yang,Hao Guo,Tingting Zhang,Ning Wu,Mingyue Wang,Fan Yang,Junye Zhang,Wu Yang
Herein, covalent organic framework (COF) and covalent triazine framework (CTF) have been successfully combined for electrochemical sensing via carboxylated multi-walled carbon nanotubes (COOH-MWCNTs). The COF was synthesized from 1,3,5-tris-(4-formylphenyl) benzene (TFPB) and benzidine (BD), named TFPB-BD-COF. Meanwhile, CTF was synthesized by 1, 4-dicyanobenzene (DCB), then chemically activated with KOH at 700 °C to obtained chemically activated porous product, caCTF-1–700. A novel electrochemical sensor based on TFPB-BD-COF/caCTF-1–700/COOH-MWCNT composite was constructed for simultaneous detection of acetaminophen (ACOP) and 4-aminophenol (4-AP). The electrochemical behaviors of the ACOP and 4-AP on the TFPB-BD-COF/caCTF-1–700/COOH-MWCNT electrode were explored via differential pulse voltammetry (DPV) and cyclic voltammetry (CV). The fabricated TFPB-BD-COF/caCTF-1–700/COOH-MWCNT composite modified glassy carbon electrode (GCE) possessed outstanding electrocatalytic performance for the electro-oxidation of acetaminophen (ACOP) and 4- aminophenol (4-AP). Under optimal conditions, the linear ranges were 0.6–150 μM for ACOP and 4-AP, respectively, with the low detection limits of 0.053 μM and 0.075 μM, respectively. In addition, it also showed excellent selectivity, repeatability, reproducibility and stability. The proposed modified electrode was applied for the determination of ACOP and 4-AP in acetaminophen tablet and Yellow river water and obtained satisfactory recovery between 96.31~103.96% and 97.2~101.6%, respectively.
研究领域:
分析化学
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电化学
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生物传感器
·
药物分析
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环境监测
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材料科学
·
纳米技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Cui Qiao,Yunong Li,Yong Li,Yuhao Han,Li Dong,Zifeng Yang,Yifan Liu,Suojiang Zhang
MgFe-LDH/CNT-COOH composite with branch-leaf-like architecture is fabricated via in-situ co-precipitation. • MgFe-LDH/CNT-COOH shows better activity and stability compared with various solid base catalysts. • Interfacial Fe–O–C bonds boost Lewis acidity and acid-base synergy. • Interfacial electronic engineering creates acid-base synergy beyond conventional basicity-dominated paradigm. Layered double hydroxides (LDHs) are promising solid base catalysts for the transesterification of ethylene carbonate (EC) with methanol to produce dimethyl carbonate (DMC), but their catalytic efficiency is often limited by severe nanosheet aggregation and insufficient regulation of active sites. Herein, a branch-leaf-like hierarchical MgFe-LDH/CNT-COOH composite was constructed via an in-situ co-precipitation strategy. The optimized composite achieved a DMC yield of 75% with a turnover frequency (TOF) of 116.14 h −1 at 60 °C. Notably, despite its lower total basicity than pristine MgFe-LDH, the composite exhibited significantly enhanced catalytic activity, indicating that the overall basicity alone does not govern the catalytic performance. Synchrotron X-ray absorption spectroscopy and density functional theory calculations revealed that the enhanced activity is closely associated with the formation of interfacial Fe–O–C bonds between MgFe-LDH and CNT-COOH. The interfacial bonding induces electron withdrawal from Fe 3+ centers and shifts the Fe 3d-band center closer to the Fermi level, thereby strengthening Lewis acidity. The enhanced Lewis acid sites facilitate the activation of EC, while the coexisting basic sites promote methanol activation, resulting in efficient acid-base synergistic catalysis. This work demonstrates that interfacial electronic modulation in hierarchical LDH-based composites provides an effective strategy for constructing high-performance acid-base synergistic catalysts. Download: Download high-res image (261KB) Download: Download full-size image
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DOI
高影响因子
TALANTA
·
2026
·
IF 6.7
Zihao Zhao,Jianlong Li,Jinmi Zhang,Qiang Li,Sheng Li,Yingbo Shi,Xiaoli Xiong
The simultaneous determination of dopamine and uric acid in complicated biological matrices remains challenging due to overlapping electrochemical signals and interference from coexisting species. Herein, a machine learning-assisted electrochemical sensor based on a Cu 3 (HHTP) 2 /COOH-MWCNTs hybrid is developed for the simultaneous determination of these analytes. Benefiting from the unique π-π stacking and π-d conjugation characteristics of Cu 3 (HHTP) 2 , as well as the excellent coordination effect between COOH-MWCNTs and Cu 2+ and the good dispersibility of carbon nanotubes themselves, the composite material exhibits more prominent surface activity, significantly boosting the exposure of active sites and accelerating the electron transfer kinetics at the electrode-electrolyte interface. On this basis, we constructed an electrochemical sensing platform for the simultaneous detection of DA and UA in human serum samples. The sensor show excellent performance with dual linear ranges of 0.5–15 and 15–80 μM for DA, and 1–200 and 200–350 μM for UA, achieving low LODs of 0.039 μM and 0.083 μM, respectively (S/N = 3). Furthermore, machine learning (ML) algorithms were employed to optimize electrochemical signal processing, enabling more accurate and robust analysis of complex data. The proposed approach achieved successful application in the simultaneous determination of DA and UA in human serum matrix samples.
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DOI
PubMed
高影响因子
DESALINATION
·
2025
·
IF 9.8
Kim-Sinh Nguyen-Thi,Eunmok Yang,Anh-Dao Le-Thi,Chang-Min Kim,Changwoo Kim,In S. Kim
As climate change exacerbates the global water crisis, desalination is becoming vital for acquiring clean water from plentiful brackish and seawater sources. Notably, interlayer thin-film nanocomposite membranes used in reverse osmosis and nanofiltration stand out as key innovations. These advanced membranes are drawing interest due to their remarkable performance, attributed mainly to their capability to create thinner selective layers in thin-film composite structures. This study introduces a novel methodology combining UiO-66-(COOH) 2 with tannic acid complexes as an interlayer to enhance filtration performance for reverse osmosis application. Various characterization methods were employed to validate this innovative approach. The techniques confirmed both the unique morphology of the membrane and the impact of tannic acid UiO-66-(COOH) 2 complexes on the polyamide membrane. Additionally, filtration tests showed notable enhancements in membrane performance, with salt permeance dropping from 0.47 LMH for the control membranes to an impressive 0.28 LMH for the membrane with tannic acid UiO-66-(COOH) 2 complexes. Permeance also increased substantially from 1.08 to 1.65 LMH/bar. A five-day stability test conducted under high-pressure conditions highlighted the durability and excellent properties of the membranes. This research showcases a promising and inventive strategy for improving the efficacy of desalination membranes, which has the potential to transform water purification technologies.
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yan-nan Wang,Jin Li,Qian Zhang,Xihao Gao,Zhenyu Yuan,Fanli Meng
This study presents a room temperature optical fiber ammonia (NH 3 ) sensor based on a polyacrylamide/metal organic framework-carbon quantum dots(–COOH) (PAM/MOF-CQDs(–COOH)) gas-sensitive film, whose performance was further enhanced with ultraviolet (UV) light. The gas-sensitive film is elaborated by the dipping-pulling method, applying PAM/MOF-CQDs(–COOH) to the surface of a cascade-spliced fiber structure based on single mode fiber (SMF), multimode fiber (MMF), hollow core fiber (HCF), MMF and SMF (S-MHM-S). Experimental results show that the sensor achieves a sensitivity of 17 pm/ppm at room temperature, representing a 3.4-fold increase compared to the scenario without UV light enhancement. The sensor has a limit of detection (LOD) of 1 ppm, with response and recovery times of 3.97 s and 3.52 s, respectively. The response mechanism of MOF-CQDs(–COOH) to NH 3 is described in detail with the results of density functional theory (DFT) calculation. The proposed fiber NH 3 sensor operates at room temperature and has great potential in practical application.
研究领域:
材料科学
·
光学工程
·
化学传感器
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Mingyue Wang,Hao Guo,Rui Xue,Qixia Guan,Junye Zhang,Tingting Zhang,Lei Sun,Fan Yang,Wu Yang
Covalent organic frameworks (COFs) offer high surface area, ordered π conjugation system, tunable pore size and structure which are useful for developing electrochemical sensor. However, most COFs were poor conductivity and slow charge transfer rate which restrict their application in electrochemical sensor. Metal-covalent organic frameworks (MCOFs) possess the good electroconductivity and catalytic activity. In addition, the periodic arrays of π clouds of layered 2D structure facilitate charge transport. Here we propose a new strategy to construct a novel electrochemical sensor employing MCOFs (CuP-SQ COF). The fabricated sensor MWCNTs-COOH/CuP-SQ COF/Co NPs/GCE exhibits the excellent performance for the simultaneous determination of DNA base (guanine and adenine) with high sensitivity which can be attributed to the outstanding properties, unique structure and synergistic effect of composites. The wider concentration range of simultaneous quantitive analysis were 0.04 to 130 μM for guanine and 0.06 to 130 μM for adenine . The lower detection limits were 5.5 nM and 7.2 nM (S/N = 3), respectively. This work proves MCOFs can serve as a promising candidate as modified electrode material for developing electrochemical sensor.
研究领域:
生物化学
·
材料科学
·
分析化学
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2020
·
IF 10.257
Juncong Miao,Kang Du,Xuan Li,Xiaoting Xu,Xue Dong,Jinglong Fang,Wei Cao,Qin Wei
Procalcitonin (PCT) as a disease marker is of great significance in the early diagnosis of septicemia and pyemia. Biosensor have good prospects for analysis and detection of disease markers, but developing highly sensitive detection methods for detecting PCT remains a daunting task. In this paper, we develop a ratiometric electrochemical immunosensor with Au NPs modified SiO 2 -Fc-COOH complex as matrix and UiO-66 loaded with Toluidine blue (TB) as a marker for quantitative detection of procalcitonin (PCT). The SiO 2 modified by APTES not only has a large specific surface area but also contains abundant amino groups, which can be connected to the electrochemical probe of ferrocenecarboxylic acid (Fc-COOH). UiO-66 has the advantages of large specific surface area, high porosity and adjustable structure, which can adsorb toluidine blue electrochemical probe through electrostatic attraction . Measurement and analysis of the prepared immunosensor by Differential Pulse Voltammetry (DPV) show that the oxidation peak currents of Fc-COOH and TB appear at potentials of 0.30 V and −0.30 V respectively. As the PCT concentration increases, the oxidation peak current of TB increases and the oxidation peak current of Fc-COOH decreases. The ratios ( ΔI = ΔI TB /ΔI Fc-COOH ) between the double signals could show a certain linear relationship with the concentration of the PCT within a certain range. Under optimal conditions, the linear range of detection obtained by the immunosensor was 1 pg/mL-100 ng/mL and the detection limit was 0.3 pg/mL. In this work, the developed ratiometric electrochemical immunosensor not only provides a simple, reliable and sensitive strategy for quantitative detection of PCT but also provides a useful method for clinical detection of other disease markers.
研究领域:
生物传感器
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医学检测
·
电化学分析
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产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2016
·Vol. 3
·期 9
·095020
·
IF 0.968
Congyue Wang,Chunfeng Wang,Dong Sun,Aoqi Li,Yujuan Chen,Kelei Zhuo
Heteroatom doped carbon dots (CDs) possess many unique properties and have attracted increasing attention. The precursor is vital for the preparation of highly fluorescent heteroatom doped CDs. Herein, 1, 3-bis(carboxymethyl)imidazolium chloride ([Im(AH)2]Cl, a COOH-functional ionic liquid) and aminoethylethanolamine (AEEA) were firstly used as precursors to prepare nitrogen-doped carbon dots (N-CDs) by a simple one-step pyrolysis approach. The effects of reaction time, temperature, and mass ratio of precursors on the quantum yield (QY) of N-CDs were investigated. The prepared N-CDs are spherical morphology with an average diameter of 2.4 nm, and have blue fluorescence with a QY of 23.2% and excitation-dependent emission behavior. They also possess good water solubility and fluorescent stability. In addition, based on the obtained N-CDs, a sensing method of free chlorine detection in acidic water system was introduced. The proposed method has good sensitivity and selectivity to free chlorine, and exhibits a nice linear response in the concentration range from 0.2 to 22 μM with a detection limit of 0.15 μM. Furthermore, this sensing method was successfully applied to detect free chlorine of tap water with satisfactory recovery (97%–103%), suggesting it has the potential application in water quality monitoring.
研究领域:
材料科学
·
环境科学
·
分析化学
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产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Yibo Zhang,Wei Wang,Chunlai Liu,Peihang Shen,Zelong Liu,Jianglei Hu,Fengwei Shi
In this work, we successfully synthesized a novel composite (HPW@MOF-199/SBA-15C, PMS-15C) in which MOF-199 encapsulated HPW catalyst (named HPW@MOF-199) was confined in SBA-15C, which is the carboxy-functionalized SBA-15. Physicochemical properties of the composites PMS-15C were systemically characterized by N 2 adsorption–desorption isotherms, wide-angle and low-angle XRD, XPS, FT-IR, SEM, and TEM. The results exhibited that HPW@MOF-199 had been successfully synthesized and embedded into the SBA-15C pores by COOH on the surface of SBA-15C. Meanwhile, the composites PMS-15C exhibited high activity and excellent reuse properties in the esterification reaction of acetic acid and ethanol, and no evidence of aggregation, leaching, or inactivation of HPW@MOF-199 during repeated use. The good dispersion of HPW within the MOF-199 cage and the interaction between HPW@MOF-199 and SBA-15C may be responsible for the good catalytic activity as well as the high stability of PMS-15C.
研究领域:
化学
·
材料科学
✓ 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）