WATER RESEARCH
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2022
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IF 13.4
Xianjun Tan,Zhenying Jiang,Wenhui Ding,Mingkun Zhang,Yuxiong Huang
The global occurrence of per- and polyfluoroalkyl substances (PFAS) in aquatic systems has raised concerns about their adverse effects on ecosystems and human health. Adsorption is a promising technique for the remediation of PFAS, yet effective adsorbents with rapid uptake kinetics and high adsorption capacity are still in high demand, and molecular-level understanding of the interfacial adsorption mechanisms is lacking. In this study, we developed a superior layered rare-earth hydroxide (LRH) adsorbent, ultrathin Y 2 (OH) 4.86 Cl 1.44 ·1·07H 2 O (namely YOHCl) nanosheets, to achieve the effective removal of perfluorooctanoic acid (PFOA). YOHCl nanosheets exhibited ultra-high adsorption capacity toward PFOA (up to 957.1 mg/g), which is 1.9 times and 9.3 times higher than the state-of-the-art layered double hydroxides (MgAl-LDH) and benchmark granular activated carbon (GAC) under the same conditions, respectively. Furthermore, YOHCl nanosheets pose stable performance on the removal of PFOA under various water matrices with robust reusability. We also developed YOHCl-based continuous-flow column, demonstrating its promise in simultaneously removing multiple PFAS with wide range of chain lengths at environmentally relevant concentrations. With the molecular-level investigations, we have revealed that multi-mechanism, including ion exchange, electrostatic attraction and bidentate/bridging coordination, contributed to the strong PFOA-YOHCl affinity, leading to the ultra-high adsorption capacity of PFOA. We have provided emerging LRHs-based adsorbents for the effective remediation of PFAS with molecular-level insights on the interfacial mechanisms.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Ye Zhang,Zhongyi Jiang,Jing Song,Jian Song,Fusheng Pan,Peng Zhang,Xingzhong Cao
Polymeric dense membranes for separating molecules with similar properties in liquid mixture according to solution-diffusion mechanisms are often constrained by trade-off effects. Integrating a facilitated transport mechanism and a sieving mechanism into membranes is a preferred approach to address this issue. Herein, amine-functionalized titanium-based metal–organic frameworks (NH2-MIL-125(Ti)) immobilized with Ag+, Ag+@NH2-MIL-125(Ti), was synthesized and hybrid membranes were fabricated for pervaporative desulfurization. The immobilized Ag+ can form reversible π-complexation toward thiophene and achieve thiophene-selectivity transport via a facilitated transport mechanism; meanwhile, Ag+ can decrease the effective pore size of the MOFs to elevate the diffusion selectivity of thiophene via a sieving mechanism. Accordingly, the resulting Pebax membranes with 1.0 wt % Ag+@NH2-MIL-125(Ti) exhibit a permeation flux of 22.11 kg/(m2 h) and an enrichment factor of 5.92. Furthermore, the hybrid membranes display increased thermostability and antiswelling properties by the incorporation of Ag+@NH2-MIL-125(Ti). This study proposes a strategy for the rational design of MOFs as nanofillers and endow the membranes with superior separation performance by integrating multiple transport mechanisms.
研究领域:
材料科学
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分离技术
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化学工程
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
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IF 3.218
Xiaoting Hong,Enhao Zhu,Zhuoliang Ye,K.S. Hui,K.N. Hui
Phosphorus removal is essential to avoid eutrophication in water bodies. Layered double hydroxides (LDHs) are widely used to scavenge phosphate through intercalated ion exchange or surface complexation. Moreover, LDHs have attracted increasing attention as electrode modifiers for supercapacitors . Researchers have begun to re-delve the electrosorption technology according to the fundamental principle of electrical double layers. Herein, we propose a new phosphate removal method inspired by the adsorption characteristic and electrical double-layer capacitive properties of LDHs through electrosorption via capacitive deionization. We present a series of experiments to study the enhanced phosphate removal under an electric field via multiple mechanisms on the MgAl-LDHs/AC electrode. The uptake of phosphate by MgAl-LDHs/AC was investigated as a function of phosphate concentration, applied voltage, electrode materials , and temperature. The MgAl-LDHs/AC electrode possessed a salt removal capacity of 67.92 mg PO 4 3− ·g −1 (1.2 V, 250 mg·L −1 KH 2 PO 4 , 30 °C). The electrosorption kinetics of phosphate ions onto the capacitive deionization electrode followed the pseudo-second-order kinetics model rather than the pseudo-first-order kinetics model. Furthermore, the adsorption isotherms of phosphate on the MgAl-LDHs/AC electrode fitted the Freundlich model better than the Langmuir model. The proposed method could be used for phosphate removal.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
·
2024
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IF 6
Yanping Li,Haoran Liu,Ronghao Fang,Jiamin Jin,Feng Yang,Jian Chen,Juzheng Zhang
Metal-based drugs have been used in the clinical treatment of tumors for over 30 years. However, no metal-based drugs have been clinically approved to treat glioma. Although metal complexes have excellent cytotoxicity, their most critical problem is crossing the blood–brain barrier. Therefore, to enable metal complexes to cross blood–brain barrier and target glioma therapy, herein, we propose to rationally used the basic structure of diazepam (5-chlorobenzophenone) and thiosemicarbazide to synthesize gold (Au) complexes C1, C2 and C3 with antiglioma activity. The C3 complex with two methyl groups attached to the N3 of thiosemicarbazone exhibited excellent cytotoxicity to glioma cells through its multiaction mechanism against glioma, inducing apoptosis, autophagy death, and deoxyribonucleic acid damage. In addition, the synthesized C3 complex can effectively cross the blood–brain barrier and accumulate in glioma, considerably decreasing the untoward reaction in vivo . Our findings provide a novel strategy for designing metal-based complexes for the treatment of glioma.
研究领域:
药理学
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肿瘤学
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金属药物设计
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DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
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IF 4.4
Jui-Lin Wang,Song Wang,Pian Zhong,Yanyan Chen,Zuzhen Zhao,Weiqiang Liu
Catheter-related infections are some of the most common acquired infections in hospitals, and designing functional coatings on the surface of medical catheters to limit bacterial colonization and biofilm formation can be effective in avoiding infections. In this study, a composite coating (PU-PDA-Ag-PDA-PHMG) with simultaneous antifouling, contact-active, and release-kill properties was prepared on polyurethane (PU) surfaces using polydopamine, Ag nanoparticles, and polyhexamethylene guanidine. This composite coating was systematically evaluated by studying its long-term hydrophilicity, long-term antibacterial property, antibiofilm property, silver release rate, mechanical property, and biocompatibility. The results of scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectrometry, and X-ray photoelectron spectroscopy showed that the PU-PDA-Ag-PDA-PHMG composite coating with multimechanism antibacterial properties was successfully prepared on the PU surface. Relative to the value of 97.62° for the unmodified PU substrate, the water contact angle of this composite coating increased from 49.73° to 61.68° after 28 days of deionized water immersion, indicating excellent long-term hydrophilic properties. Also, this composite coating reduces protein adhesion by 58.67%. After 28 days of immersion in the PBS solution, the antibacterial rates against Staphylococcus aureus and Escherichia coli still reached 97.67% and 99.5%, respectively, indicating broad-spectrum and long-term antibacterial properties. The antibiofilm property of the composite coating surface was significantly improved compared with that of the single-mechanism coating, and the surface was almost free of any bacteria. The total amount of silver ions released from the composite coating was about 16.95% of that from PU-PDA-Ag within 14 days, which proved that the composite coating could significantly reduce the release rate of silver ions. The coating preparation process also did not change the original excellent mechanical properties and biocompatibility of PU (cytotoxicity level of 1). In conclusion, the composite coating developed in this study has great potential for reducing catheter-associated infections.
研究领域:
生物医学工程
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材料科学
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感染控制
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产品关联
DOI
高影响因子
Bioactive Materials
·
2020
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IF 8.724
Xiaodan Tang,Hongmei Yu,Brian Bui,Lingyun Wang,Christina Xing,Shaoyan Wang,Mingli Chen,Zhizhi Hu,Wei Chen
Iodine ion is one of the most indispensable anions in living organisms, particularly being an important substance for the synthesis of thyroid hormones. Curcumin is a yellow-orange polyphenol compound derived from the rhizome of Curcuma longa L. , which has been commonly used as a spice and natural coloring agent, food additives, cosmetics as well as Chinese medicine. However, excess curcumin may cause DNA inactivation, lead to a decrease in intracellular ATP levels, and trigger the tissue necrosis. Therefore, quantitative detection of iodine and curcumin is of great significance in the fields of food and life sciences. Herein, we develop nitrogen-doped fluorescent carbon dots (NCDs) as a multi-mechanism detection for iodide and curcumin in actual complex biological and food samples, which was prepared by a one-step solid-phase synthesis using tartaric acid and urea as precursors without adding any other reagents. An assembled NCDs-Hg 2+ fluorescence-enhanced sensor for the quantitative detection of I − was established based on a fluorescence “turn-off-on” mechanism in a linear range of 0.3–15 μM with a detection limit of 69.4 nM and successfully quantified trace amounts of I − in water samples and urine sample. Meanwhile, the as-synthesized NCDs also can be used as a fluorescent quenched sensor for curcumin detection based on the synergistic internal filtration effect (IFE) and static quenching, achieving a good linear range of 0.1–20 μM with a satisfactory detection limit of 29.8 nM. These results indicate that carbon dots are potential sensing materials for iodine and curcumin detection for the good of our health.
研究领域:
分析化学
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生物医学
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食品科学
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DOI
PubMed
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-16
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IF 3.9
Wu Yongming,Pei Kexuan,Zhou Jiayu,Xiong Jianzhong,Liu Yu,Li Panrong,Li Fangfei,Wang Jiaqi,Liu Xiangmin,Deng Mi,Wu Chenxi
A novel substitute for perfluorooctane sulfonate (PFOS), 6:2 Chlorinated polyfluoroalkyl ether acid (6:2 Cl-PFAES, F-53B), has been widely used in the electroplating and firefighting industries, raising concerns due to increasing environmental prevalence. This study systematically investigated the adsorption characteristics of F-53B by coconut shell activated carbon (CSAC) and elucidated the underlying mechanisms through adsorption kinetics, isotherm modeling, and multi-scale characterization. Results show that the maximum adsorption capacity of CSAC for F-53B reached 261.64 mg/g, with the process best described by the pseudo-second-order kinetic model (R 2 > 0.97) and the Langmuir isotherm (R 2 > 0.94). Intraparticle diffusion modeling revealed a three-stage adsorption sequence: surface adsorption (0–2 h), pore diffusion (2–8 h), and dynamic equilibrium (8–48 h). Solution pH influenced adsorption efficiency by regulating surface charge. Under acidic conditions (pH < point of zero charge, pHzpc = 4.49), strong electrostatic interactions between protonated CSAC surfaces and anionic F-53B resulted in an 85% removal efficiency. In contrast, alkaline conditions (pH > 7) led to a 70% reduction in adsorption efficiency ( p < 0.05) due to electric repulsion. The microporous-dominated structure of CSAC (specific surface area: 857.69 m 2 /g; pore volume: 0.34 cm 3 /g) facilitated synergistic adsorption mechanisms. Oxygen-containing functional groups (C-O, -OH) promoted hydrogen bonding and hydrophobic interactions, enhancing F-53B adsorption. Besides, CSAC is optimized for emergency scenarios, it achieves 99.9% removal efficiency for 1 mg/L F-53B within 8 h at room temperature, with a maximum capacity of 261.64 mg/g; also, it maintains > 85% removal efficiency under wide pH conditions and tolerates coexisting ions (e.g., Cl − , SO 4 2− , Ca 2+ ).This study highlights the multi-mechanistic synergy of CSAC in theremoval of F-53B, providing theoretical foundations and technical insights for biochar-based remediation of emerging contaminants.
研究领域:
环境科学
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化学工程
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水处理
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吸附技术
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材料科学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2024
·
IF 8.5
Xuechi Yin,Jiayi Zhang,Yuanyuan Cheng,Yangyang Lu,Qiaoying Wu,Leina Dou,Yanru Wang,Jianlong Wang,Daohong Zhang
Fully excavating and utilizing the rich information presented on bacterial surfaces can open innovative solutions for the multi-mechanism detection of food-borne pathogens. In this work, a colorimetric-fluorescence dual-signal lateral flow immunoassay was used to establish a simultaneous detection strategy integrating five physical, chemical, and biometric combining mechanisms for Salmonella typhimurium ( S. typhimurium ) and Staphylococcus aureus ( S. aureus ). To improve sensitivity, a layer-by-layer design of aggregation-induced emission nanosphere@ polydopamine@ platinum (AIENS@PDA@Pt) nanostructure with excellent colorimetric-fluorescence signal, abundant recognition sites, and rough surface was employed as a signal tag. Under optimal conditions, the colorimetric detection limit of the multi-mechanism reliant simultaneous detection LFIA (multi-MRSD LFIA) for S. typhimurium and S. aureus is 2 × 10 4 and 5 × 10 4 cfu·mL −1 , respectively, and the fluorescence detection limit is 500 cfu·mL −1 for both target bacteria. This study introduces a novel approach for multi-target, multi-mechanism, and multi-signal output detection of bacteria, providing a significant direction for pathogen research.
研究领域:
食品安全
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微生物学
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生物传感技术
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产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Shuangjiang He,Zhong Zeng,Hui Liu,Shaowei Chen,Lin Gan,Youquan Ling,Shuai Li,Long Ni,Xiaowen Zhao,Mei Liang,Yang Chen,Huawei Zou
To overcome the inherent limitations of conventional low-molecular-weight antioxidants for rubber, such as pronounced migration propensity, inadequate long-term antioxidative efficiency, and potential toxicological or environmental hazards, this work, for the first time, reports the synthesis of a biomass-derived poly(tannic acid)-based antioxidant (PTRB) featuring hierarchical antioxidative moieties (aniline groups from N-phenyl-p-phenylenediamine, phenolic hydroxyls from tannic acid, and thioether-based secondary antioxidative moieties from 2-mercaptobenzimidazole). Comprehensive characterizations, which combining experimental methodologies, molecular dynamics (MD) simulations, and quantum mechanics (QM) simulations, elucidated the regulatory roles of PTRB on the thermo-oxidative aging resistance, solubility, dispersibility, diffusivity, and protective mechanisms of nitrile butadiene rubber (NBR). In comparison with commercial antioxidants, PTRB significantly enhances the aging resistance of NBR composites, with the aging performance exhibiting improvements ranging from 24% to 267% (quantified by the aging coefficient K following accelerated aging at 121°C for 120 h). QM simulations demonstrated that the aniline moiety significantly enhances the radical-scavenging capacity of the PTRB. Meanwhile, the thioether moiety offers additional synergistic protection through the degradation of peroxyl radicals (ROO·) into stable alcohols. MD simulations further confirmed that the PTRB/NBR composites display superior interfacial interactions, resulting in higher binding energy. This, in turn, this improves the solubility and dispersibility of PTRB within the NBR matrix and reduces its diffusion coefficient. Furthermore, PTRB effectively promotes the vulcanization of NBR by regulating the sulfide cross-linking structure and further enhances the interfacial compatibility between the filler and the rubber. Consequently, this study introduces a sustainable, biomass-derived, multi-mechanistic antioxidant. This antioxidant possesses considerable significance for the fabrication of NBR composites with long-term and high aging resistance, thereby addressing the crucial challenges encountered by conventional low-molecular-weight antioxidants in practical applications.
研究领域:
高分子材料科学
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橡胶工业
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功能材料
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可持续化学
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分子模拟
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抗氧化机制
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复合材料
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xiangxiang Chen,Guoxin Ding,Yan Liu,Yunwang Xing,Weipeng Qi,Guojun Cheng
In answer to the need for materials that absorb electromagnetic waves with great efficiency, this study reports the design and synthesis of a core–shell structured GM@NiFe-LDH@PANI composite. The material exhibits outstanding electromagnetic wave (EMW) absorption performance through multi-component synergy and multi-mechanism coupling. XRD and XPS analyses confirmed the material’s crystalline structure and chemical composition, while SEM images revealed the core–shell morphology, showing NiFe-LDH nanosheets uniformly anchored on glass microspheres (GM) surfaces, forming a hydrangea-like structure. Subsequent incorporation of polyaniline (PANI) further increased the heterojunction interface. Electromagnetic property measurements demonstrated that GNP-2 achieved optimal impedance matching at a thickness of 1.71 mm, resulting in a strong reflection loss of −52.86 dB and an effective absorption bandwidth of 4.72 GHz. The hydrangea-like NiFe-LDH structure enhances magnetic loss and promotes scattering and reflection through its porous framework, intensifying interfacial polarization effects. The conductive PANI shell, with its exposed active sites, facilitates EMW absorption through dipole polarization and conductive loss mechanisms. This core–shell porous design synergistically optimizes dielectric and magnetic losses. This composite material demonstrates considerable potential for electromagnetic compatibility applications in radar stealth, modern communication systems, and renewable energy devices.
研究领域:
材料科学
·
电磁学
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纳米技术
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复合材料
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电磁兼容性
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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）