DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 24
·8540-8548
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IF 4.39
Zixuan Li,Deyi Zhan,Abdul Saeed,Nanjing Zhao,Junfeng Wang,Weihong Xu,Jinhuai Liu
Due to their ultra-thin morphology, larger specific surface area and more exposed active sites, two-dimensional (2D) metal–organic framework (MOF) nanosheets can break the limitations of three-dimensional (3D) MOFs in sensitivity, response speed and the limit of detection for sensing applications. In this work, fluorescent NH2-MIL-53(Al) nanosheets were developed as a fluoride detection sensor compared with the 3D bulk counterpart. The morphological and structural characteristics of the obtained products were systematically characterized, and the favourable chemical and fluorescence stability of the NH2-MIL-53(Al) nanosheets were explored. The fluorescent NH2-MIL-53(Al) nanosheets showed high sensitivity, fast response speed (as short as 10 seconds), low limit of detection (15.2 ppb), and wide linear detection range (5–250 μM), and all performances were better than those of their bulk counterpart. In addition, the sensing mechanism was investigated to be based on the transformation of the NH2-MIL-53(Al) framework that induced the release of fluorescent ligands, resulting in an exceptionally enhanced fluorescence. This work highlights the advantages of 2D MOF nanosheets in fluorescence sensing applications.
研究领域:
材料科学
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化学传感器
·
光学检测
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Guojun Weng,Yao Feng,Jing Zhao,Jianjun Li,Jian Zhu,Junwu Zhao
Ag triangular nanoplates have been widely used as the SERS substrate due to their anisotropic morphology and sharp corners. In this work, SERS activity of Ag triangular nanoplates on glass and paper substrates was investigated with different concentration and size. A tiny triangular nuclei based synthesis method was employed to produce Ag triangular nanoplates with different size. And the extinction coefficients of Ag triangular nanoplates with different size were quantified by inductively coupled plasma mass spectrometry (ICP-MS) and transmission electron microscopy (TEM). With definite concentration, Ag triangular nanoplates with small size showed stronger SERS intensity on glass substrate at high concentrations, while large Ag triangular nanoplates exhibited better SERS effect on paper substrate at low concentrations. The possible reasons for distinct SERS activity of Ag triangular nanoplates on glass and paper were discussed with scanning electron microscope (SEM) characterization. These results exhibited important implications for fabricating Raman substrates using Ag triangular nanoplates and could be applied to the SERS sensing with flexile substrate.
研究领域:
材料科学
·
光谱学
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高影响因子
RSC Advances
·
2025
·Vol. 15
·期 59
·50682-50691
·
IF 4.6
Qin Guo,Chaoting Guan,Yi Yang,Yang Zhou,Jin Jiang
Sulfur-reductants (e.g., sulfite and thiosulfate) can enhance ferrate (Fe(VI)) oxidation toward organic contaminants, which has recently attracted increasing attention. This work presented a systematic and comparative study on the oxidation performance, products, and pathways of atrazine (ATZ, one of the most widely used s-triazine herbicides) by Fe(VI)/sulfite and Fe(VI)/thiosulfate systems. Both systems achieved efficient ATZ degradation with the optimal efficiency at neutral pH, and the efficiency was affected by reagents dosage and co-existing components (e.g., Cl−, NO2−, natural organic matter). Five oxidation products of ATZ were produced in Fe(VI)/sulfite and Fe(VI)/thiosulfate systems, and their formation was quantified. ATZ degradation was initiated via electron transfer, resulting in dealkylation, alkylic-oxidation, and dechlorination-hydroxylation. Specifically, the molar ratio of two primary products (atrazine amide (CDIT) and deethyl-atrazine (DEA)) was calculated. In Fe(VI)/sulfite system, the [CDIT]/[DEA] value varied in the range of 0.04–0.82, depending on solution chemistry. Comparatively, the ratio obtained in Fe(VI)/thiosulfate system kept relatively constant at ∼0.2 under various conditions, coinciding with that reported in pure Fe(IV) oxidation. This discrepancy was attributed to the difference of reactive oxidants involved in Fe(VI)/sulfite (SO4˙− and Fe(V)/Fe(IV)) vs. Fe(VI)/thiosulfate systems (Fe(IV) alone). These insights advance understanding of the novel Fe(VI)/sulfur-reductants systems, and promote their potential applications.
研究领域:
环境化学
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水处理技术
·
高级氧化过程
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污染物降解
·
活性物种
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高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 5
·期 3
·952-957
·
IF 8.262
Kui Zhou,Bibimaryam Mousavi,Zhixiong Luo,Shophot Phatanasri,Somboon Chaemchuen,Francis Verpoort
A novel Zn/Co zeolitic imidazolate framework (ZIF) has been constructed by an easy and straightforward room temperature technique. Several characterization techniques such as SEM, TEM-EDX, single-crystal XRD and ICP have been applied to confirm that the structure formed is a sodalite (SOD) cage type structure. The Zn/Co-ZIF possesses a high nano-crystallinity and porosity with a large surface area. By tuning the amount of Co and Zn in the Zn/Co zeolitic imidazolate framework, the physical and chemical properties have been improved compared with those of the single metal frameworks (ZIF-8 and ZIF-67). Consequently, the Zn/Co-ZIF was investigated for two different applications; gas adsorption (CO2, CH4 and N2) and catalysis (CO2 conversion to cyclic carbonates) and the obtained results were compared with the performance of previously reported single metal frameworks (ZIF-8 and ZIF-67). Additionally, hydrolytic stability tests under ambient conditions and immersed in water at 75 °C were performed and pointed out that Zn/Co-ZIF exhibits a higher stability. Moreover, based on these results, the Zn/Co-ZIF demonstrates better properties compared with ZIF-8 and ZIF-67.
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高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Xiaobing Wang,Yun Gao,Hanyu Chai,Kai Yang,Jinsu Liao,Chao Zhang,Jianhuan Wei,Fazheng Ren,Pengjie Wang,Yi Wang
Buffalo milk caseins coagulated faster into larger, rougher curds in gastric phase. • Buffalo milk showed slower and more sustained protein hydrolysis in gastric phase. • Fewer peptide species with lower sequence coverage were generated from buffalo milk. • Clot structure during gastric digestion was the key factor affecting hydrolysis. This study compared the digestion behavior and peptide profiles of water buffalo and Holstein skim milk using the standardized INFOGEST in vitro protocol. During the gastric phase, protein hydrolysis and amino acid release demonstrated that buffalo milk proteins underwent a slower but more sustained digestion process than those of Holstein milk. SDS–PAGE analysis further confirmed the slower rate of protein hydrolysis in buffalo milk. Particle size distribution and confocal microscopy revealed that buffalo milk coagulated more rapidly into larger and more wrinkled coagulates than Holstein milk, which likely reduced pepsin accessibility and contributed to the slower protein hydrolysis. LC–MS peptide profiling further showed that buffalo milk generated fewer peptide species with lower protein sequence coverage following gastric digestion. In the intestinal phase, proteins from both milks were rapidly degraded, and species differences in protein hydrolysis behavior and peptide profiles became less pronounced. Download: Download high-res image (165KB) Download: Download full-size image
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Yufan Yuan,Danping Li,Huajun Huang,Jinbao He,Chenglong Yu,Yanpeng Gao,Davide Vione,Hansun Fang
The direct photodegradation quantum yields ( Φ ) of five representative aromatic carbamate pesticides - carbaryl, carbofuran, propoxur, isoprocarb, and metolcarb - were examined in both aqueous and non-aqueous solutions, the latter mimicking hydrophobic environments such as leaf surfaces. For carbaryl, carbofuran, isoprocarb, and metolcarb, the Φ values generally followed the order Φ water < Φ MeOH < Φ n - hexane , while propoxur showed a different trend, Φ MeOH < Φ n-hexane < Φ water . Scavenging and laser flash photolysis experiments, combined with quantum chemical calculations, were used to clarify the photodegradation mechanisms. Photodegradation is primarily initiated by the singlet excited state (S*), with the triplet state (T*) also contributing in compounds with conjugated structures, such as carbaryl. Upon excitation, MCAEs generated both radical cations (S •+ ) and phenoxyl radicals (S-O • ), and S •+ would convert to S-O • subsequently. S-O • is predominantly generated through the cleavage of C-O bonds in ester groups, subsequently abstracting hydrogen from solvent molecules. The reactivity of hydrogen donors in these solvents follows the order: -CH 2 - > -CH 3 > -OH. For propoxur, the ether group also contributes to the formation of S-O • , which further reacts with H 2 O and enhances degradation in aqueous environments. Solvent polarity had a minimal effect on photodegradation. This comparative study of degradation in aqueous and nonaqueous phases provides insights for designing and selecting pesticides that are effective during use in nonaqueous environments, such as on leaf surfaces, yet degrade rapidly in aqueous environments in the post-application phase.
研究领域:
环境科学
·
化学
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Mengfan Luo,Heng Zhang,Jianhua Guo,Jia Zhao,Can Feng,Jialong Yin,Chang Xu,Ye Du,Yang Liu,Chuan-Shu He,Bo Lai
Redox-inactive metal-ion-driven modulation of the oxidation behavior of high-valent metal–oxo complex has garnered significant interest in biological and chemical synthesis; however, their role in permanganate (Mn(VII)) oxidation for the removal of organic pollutants has been largely neglected. Here, we uncover the impact of six metal ions (i.e., Ca2+, Mg2+, Ni2+, Zn2+, Al3+, and Sc3+) presenting in water environments on Mn(VII) activity. These ions uniformly boost the electron and oxygen transfer capabilities of Mn(VII) while impeding proton transfer, as evidenced by electrochemical tests, thioanisole probe analysis, and the kinetic isotope effect. The observed effects are intricately linked to the Lewis acidity of the metal ions. Further mechanistic insights reveal that Mn(VII) can interact with metal ions without direct reduction. Such interactions modify the electronic configuration of Mn(VII) and create an acidic microenvironment, thus increasing its electrophilicity and the energy barrier for the abstraction of proton from organic substrates. More importantly, the efficacy of Mn(VII) in removing phenolic pollutants is regulated by these ions through changing the driving force for proton and electron transfer, i.e., facilitated at pH > 4.5 and inhibited at lower pH. The contribution of active Mn intermediates is also discussed to reveal the oxidative mechanism of the metal ion/Mn(VII) system. These findings not only facilitate the rational design of Mn(VII) oxidation conditions in the presence of metal ions for water decontamination but also offer an alternative paradigm for enhancing electrophilic oxidation.
研究领域:
环境科学
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化学动力学
·
水处理技术
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高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Chiyuan Chen,Ziqi Zhao,Feng Liu,Hongyu Yang,Xiaming Feng,Chaojun Wan
This study addresses the flammability issue of the biodegradable polyester polylactic acid (PLA) by proposing a supramolecular flame-retardant strategy. Leveraging the critical regulatory role of aromatic topology on molecular assembly and flame-retardant performance, two supramolecular flame retardants, HEMPD and HEDAN, were synthesized through hydrogen-bonding networks utilizing hydroxyethylidene diphosphonic acid (HEDP) with m-phenylenediamine (MPD) and 1,5-diaminonaphthalene (DAN), respectively. Comparative studies within PLA composites were conducted to systematically investigate the quantitative influence of aromatic structure on gas-phase/condensed-phase flame-retardant mechanisms and thermal stability. HEMPD and HEDAN achieved a UL-94 V-0 rating at additive loadings of 4 and 2 wt %, respectively. At a 4 wt % loading, both significantly enhanced the limiting oxygen index (LOI) of PLA from 19% to 24% (HEMPD) and 24.5% (HEDAN), while reducing the peak heat release rate (PHRR) by 14.94% and 11.98%, respectively. Consequently, the flame retardancy and thermal stability of PLA were markedly improved. This work provides the first mechanistic insight into the structure–property relationship between aromatic topology and the efficacy of supramolecular flame retardants, paving the way for achieving high-efficiency flame retardancy in biobased materials.
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Frontiers in Microbiology
·
2025
·
IF 4.5
Guang Yang,Ying Huang,Ning Ma,Kai Li,Xiao-mei Wang,Lian-bo Zhang,Wen-bo Yang,Wan-li Zhang,Lei Xia,Hong-Yu Zhang,Li-lai Yuan
Aeromonas hydrophila is a major pathogen responsible for significant economic losses in global aquaculture. Inhibitory and bactericidal activities of seven disinfectants were tested against 10 aquatic pathogens, including A. hydrophila, A. veronii, A. salmonicida, A. sobria, Edwardsiella tarda, E. ictaluri, Pseudomonas aeruginosa, and Yersinia ruckeri. Minimal effective concentrations were determined via quantitative suspension tests, while a scale-trauma zebrafish model assessed in vivo protection. Methylene bis(thiocyanate) (MBT) exhibited the strongest antimicrobial activity, with minimum inhibitory concentrations and minimum bactericidal concentrations of 0.1–0.4 mg/L and 0.2–0.8 mg/L, respectively. At 0.01 mg/L, MBT achieved a 3-log pathogen inactivation, equivalent to 0.2 mg/L Trichloroisocyanuric acid (TCCA). In vivo, 0.01 mg/L MBT provided 100% protection in zebrafish after 6 and 12 h exposure, whereas 0.2 mg/L TCCA yielded 95.83 ± 3.61% survival after 1 h. The safe concentrations of MBT and TCCA for zebrafish were 0.0364 and 0.0677 mg/L, respectively. The results showed that both TCCA and MBT effectively controlled A. hydrophila infection; however, MBT demonstrated greater potential for aquaculture applications due to its lower effective concentration (0.01 mg/L) and reduced sensitivity to interference from organic matter. In addition, this study presents a systematic protocol for evaluating the efficacy of disinfectants.
研究领域:
水产养殖
·
微生物学
·
抗菌剂
·
传染病
·
鱼类健康管理
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PubMed
高影响因子
Lubricants
·
2026
·Vol. 14
·期 7
·250
·
IF 3.6
Gaobo Lou,Xiaoling Yao,Yuhao Fang,Yifan Chen
The influence of BN particle size on lithium grease performance was systematically compared among a base grease (Li), a micro-BN (3 µm, 0.1 wt%) modified grease (Li + 0.1% mBN), and a nano-BN (50 nm, 0.1 wt%) modified grease (Li + 0.1% nBN). SEM shows that addition nano-BN leads to a more compact soap fiber networks, whereas micro-BN tends to agglomerate and provides limited reinforcement, leaving the base grease with a loose, porous network. Consequently, Li + 0.1% nBN outperforms both Li and Li + 0.1% mBN in dropping point (199.5 °C vs. 194.9 °C and 198.6 °C), oil separation (0.39% vs. 0.64% and 0.44%), and flow point (49% vs. 45% and 47%). Its plateau modulus is significantly higher, reflecting stronger network entanglement. However, Li + 0.1% nBN shows lower structural recovery (61.0%) than Li (65.8%) and Li + 0.1% mBN (67.2%) due to rigid particle–fiber junctions. Notably, Li + 0.1% mBN exhibits a unique frequency-dependent viscoelasticity: higher tanδ at low frequencies but lower tanδ at high frequencies relative to Li. Tribologically, Li + 0.1% nBN reduces friction coefficient by 35% and wear scar diameter by 12.7% compared with Li, outperforming Li + 0.1% mBN. XPS confirms a protective hybrid tribofilm (BN + organic nitrogen species + iron oxides) on the nano-BN lubricated surface. Particle size critically governs BN–fiber interactions and the resulting rheological and tribological performance.
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高影响因子
Innovative Food Science & Emerging Technologies
·
2026
·
IF 6.9
Jianwen Zhang,Xiuli Wu
The emulsifying stabilization mechanisms and performance differences between soluble and insoluble acetylated starches were investigated. A composite modified starch (HH-ACS) was prepared via acetylation combined with acid-heat treatment and used to stabilize Pickering emulsions, whose stability and interfacial structure were systematically evaluated. Through SEM and FTIR analysis, it was found that the HH-ACS retained its granular structure, and no new absorption peaks were detected. However, its relative crystallinity decreased from 28.27% to 18.44%, and the content of short-chain structures increased by 18.81%. Significantly, the Pickering emulsion stabilized by 0.45HH-ACS exhibited more uniform particle sizes and a higher Zeta potential. HH-ACS shows promise as a potential egg yolk substitute for preparing low-cholesterol mayonnaise (LM). Correlation analysis demonstrated that when LM was prepared using 0.45HH-ACS, which exhibited the best emulsifying capacity, it displayed higher viscoelasticity and a narrower particle size distribution.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yuan Li,Xuejiang Wang,Yuan Wang,Siqing Xia,Hongbin Xu,Jianfu Zhao
The co-occurrence of biodegradable microplastics (BMPs) and antibiotics in wastewater poses environmental concern. However, the effects of different environmental ageing processes on antibiotic-BMPs interfacial interactions remain inadequately characterized. This study systematically compared the adsorption-desorption behaviour of sulfamethazine (SM2) onto biodegradable poly(butylene succinate) microplastics (PBS-MPs) subjected to sewage microbial exposure (B-PBS-MPs) and sunlight exposure (P-PBS-MPs). Kinetics of SM2 adsorbed on all MPs conformed to the Elovich model, indicating that the adsorption rates synergistic controlled by liquid-film and intra-particle diffusion. The maximum adsorption capacities predicted by Langmuir model increased from 76.52 μg/g for PBS-MPs to 316.58 μg/g for B-PBS-MPs and 351.49 μg/g for P-PBS-MPs, indicating that sunlight exposure exerted more pronounced adsorption enhancement than microbial exposure. Mechanistic divergences were observed: pristine PBS-MPs exhibited Langmuir-type monolayer adsorption dominated by non-bonding interactions, whereas sunlight-exposed P-PBS-MPs followed Freundlich-type multilayer adsorption driven by hydrogen bonding and van der Waals forces. For microbial-exposed B-PBS-MPs, adsorption obeyed the Langmuir-Freundlich model—micropore filling may dominated at low SM2 concentrations, while complexation of SM2 and biofilm-associated extracellular polymeric substances (EPS) prevailed at higher concentrations. The results of desorption hysteresis indicated the most stable SM2 retention in microbial-exposed MPs via SM2-EPS chemical bonds and the least stable SM2 adsorption in sunlight-exposed MPs due to the weak binding force. These findings demonstrate that ageing differentiates biodegradable MPs into distinct antibiotic vectors: microbial exposure enhanced adsorption capacity and stability, whereas sunlight exposure elevated remobilization risks. This work contributes to the assessment of the compounded environmental risks of BMPs and antibiotics.
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危险品化学品经营许可证（带存储）