JOURNAL OF MOLECULAR STRUCTURE
·
2020
·
IF 2.463
Dan Mo,Jingnan Shi,Dandan Zhao,Yuzhen Zhang,Yifu Guan,Yunjun Shen,Hedong Bian,Fuping Huang,Shengfu Wu
Three transition metal complexes (Fe III , Co III , and Cu II ) were synthesized by hydrothermal method from bis(2-hydroxy-1-naphthalene-formaldehyde) 3,4-diaminobenzoic acid (H 3 L). They were characterized by infrared spectroscopy, elemental analysis, mass spectrometry. Artificial enzymes were constructed by hybridizing bovine serum albumin (BSA) with the metal complexes and characterized by MALDI-TOF-MS. The interaction of the metal complexes with BSA was studied by Raman spectroscopy, fluorescence spectroscopy, and circular dichroism spectroscopy. All the three metal complexes can cause the intrinsic fluorescence quenching of BSA, which is mainly static quenching. The addition of metal complexes changed the conformation of BSA and decreased the content of α–helix structure. The activity of SOD was measured by xanthine oxidase-NBT method. All metal complexes exhibited certain SOD activity, which increased after the formation of hybrid proteins. Asymmetric oxidation of thioether catalyzed by artificial enzymes was studied. The optimum reaction conditions were obtained by optimizing the reaction conditions. Substrate universality experiments were carried out under the optimum reaction conditions, showing good activity and enantioselectivity, with enantioselectivity up to 81%.
研究领域:
生物化学
·
金属有机化学
·
酶学
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DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Yifan Zhang,Shaole Ling,Yueqisha Chen,Xianmin Qin,Keshan Wang,Qiujin Zhu,Yuanyuan Liu
As the demand for food quality and safety continues to rise, antimicrobial active packaging materials with good mechanical and barrier properties have received urgent attention from the food industry. In this study, three types of Ag/tannic acid-Fe III ion nanocomposites (TFA) were synthesized using an in-situ method and incorporated into a chitosan/gelatin/polyvinyl alcohol complex film (CF) to produce multifunctional and highly cross-linked active films. The impact of TFA prepared through three different methods on the microstructure and functional properties of the CF were investigated. The structure of the TFA-loaded films was investigated to confirm the strong intermolecular interactions between the polymers and TFA. The TFA established multidimensional physical interactions and cross-linked the polymers, thereby enhancing the mechanical properties of the CF and providing excellent antioxidant activity and photothermal effects. Under 808 nm near-infrared laser irradiation, the TFA-loaded films displayed potent antibacterial performance against both S. aureus and E. coli bacteria. This study demonstrated that the nanocomposite prepared via ascorbic acid reduction (TFAV) given the highest comprehensive performance rating to the film. It can be utilized not only for conventional food packaging but also as a continuous sterilization strategy for meat products storage due to its photothermal antibacterial functionality.
研究领域:
食品科学
·
材料科学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Hang Liu,Hua Yin,Xiaolong Yu,Minghan Zhu,Zhi Dang
In this work, the amino-functionalized metal-organic frameworks (MIL-88B-NH 2 ) was synthesized, characterized and used as heterogeneous photo-Fenton catalyst for tris-(2-chloroisopropyl) phosphate (TCPP) degradation. The photo-Fenton activity of MIL-88B-NH 2 was investigated on the basis of influence factors, such as initial pH and TCPP concentration, and coexisting impurities. The results revealed that MIL-88B-NH 2 +H 2 O 2 +Vis system exhibited a satisfactory degradation efficiency of TCPP (almost 100%) within 60 min accompanied by a good reusability. Noticeably, the degradation kinetics constant of TCPP by MIL-88B-NH 2 +H 2 O 2 +Vis system was 0.086 min −1 , which was visibly higher than that of MIL-88B+H 2 O 2 +Vis system (0.021 min −1 ) since the addition of amino-functionalized organic linker inhibiting the recombination rate of the photo-generated electron-hole pairs and improving the visible light response. Combined with the characterization, the conversion of Fe III to Fe II could be accelerated by the photo-generated electron from the excitation of Fe-O clusters and NH 2 functionalities, which strengthened the decomposition of H 2 O 2 and formed plenty •OH. Simultaneously, six steady products were validated and potential degradation pathways of TCPP were proposed. It was anticipated that MIL-88B-NH 2 could be considered as a desirable and alternative candidate in the application of heterogeneous photo-Fenton reaction to control the environmental risks caused by organophosphate flame retardants (OPFRs).
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
COLORATION TECHNOLOGY
·
2023
·Vol. 140
·期 2
·300-312
·
IF 1.8
Jianing Fan,Shouying Wu,Zixian Wang,Minglong Zheng,Miaomiao Zhang,Linping Zhang,Yi Zhong,Xiaofeng Sui,Hong Xu,Zhiping Mao
The discharge of coloured textile printing and dyeing wastewater causes environmental pollution. Disposing of wastewater efficiently, simply and with low consumption, is a problem that must be addressed. Herein, a catalytic method for rapid decolorisation of organic dyes was devised employing a terpyridine iron complex to activate oxidised permonosulphate. CI Acid Red 1 was used as the simulated pollutant, the influences of operating parameters on the fading effects of wastewater were explored. According to the results, the produced catalytic system exhibits a universal catalytic effect. Even when the dye concentration reaches 76.4 mg/L, the dyeing wastewater may be effectively decolorised. In addition, when anions (HCO 3 − , SO 4 2− , Cl − ) were present in the solution, the degradation effect of CI Acid Red 1 was still effective. Interestingly, active species such as sulphate radicals and singlet oxygen were detected in the catalytic degradation system by radical capture experiments. The removal rate of total organic carbon can achieve a percentage of 26.22% in 2 hours. This research provides a unique, enzyme-like catalytic system for the rapid breakdown of dye contaminants.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
iScience
·
2022
·
IF 6.107
Zheng Qian,Lingzhen Wang,Mawuli Dzakpasu,Yujia Tian,Dahu Ding,Rongzhi Chen,Gen Wang,Shengjiong Yang
The mechanism of spontaneous Fe III /Fe II redox cycling in iron-centered single-atom catalysts (I-SACs) is often overlooked. Consequently, pathways for continuous SO 4 ·- /HO⋅ generation during peroxymonosulfate (PMS) activation by I-SACs remain unclear. Herein, the evolution of the iron center and ligand in I-SACs was comprehensively investigated. I-SACs could be considered as a coordination complex created by iron and a heteroatom N-doped carbonaceous ligand. The ligand-field theory could well explain the electronic behavior of the complex, whereby electrons delocalized by the conjugation effect of the ligand were confirmed to be responsible for the Fe III /Fe II redox cycle. The possible pyridinic ligand in I-SACs was demonstrably weaker than the pyrrolic ligand in Fe III reduction due to its shielding effect on delocalized π orbitals by local lone-pair electrons. The results of this study significantly advance our understanding of the mechanism of spontaneous Fe III /Fe II redox cycling and radical generation pathways in the I-SACs/PMS process.
研究领域:
催化
·
环境化学
·
材料科学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Na Wang,Wenjie Ma,Yunchen Du,Ziqiu Ren,Binhua Han,Leijiang Zhang,Bojing Sun,Ping Xu,Xijiang Han
The morphology-dependent property of crystal materials has aroused extensive attention and raised high requirements for subtly tailoring the morphology of micro-/nanocrystals. Herein, we develop an in situ etching method for preparation of Prussian blue (PB) microcrystals with morphology evolution by progressively increasing the concentration of chloroplatinic acid in the reaction system. These PB microcrystals with controllable morphologies are employed as photo-Fenton reagents to degrade organic pollutants. PB hexapods (PB-hpds) and PB hexapod stars present superior catalytic performance to pristine PB microcubes and other PB intermediates with truncated corners or edges because of their high specific surface areas and adequate exposure of FeIII–NC coordination active sites. In the reusability test, the reused PB-hpds present more efficient catalytic performance for rhodamine B decomposition compared with the pristine catalyst. According to more investigations, the reasonable mechanism is proposed that FeIII–NC exhibits higher catalytic activity than FeII–CN in the specific coordination environment. The increased content of surface FeIII–NC coordination active sites is the key factor in accelerating the decomposition of H2O2 and enhancing the photo-Fenton performance of PB-hpds. Several operating parameters including catalyst dosage, H2O2 concentration, pH value, and reaction temperature are evaluated in detail. Classical quenching experiments and electron paramagnetic resonance measurements further reveal that HO• should be responsible for high performance of catalysts. This work will be significant for tailoring the morphology of the materials and arousing more attention to enhance the stability and reusability of catalysts.
研究领域:
材料科学
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环境科学
·
催化化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Xuyang Yan,Jian Zhang,Yanru Zhu,Zhe An,Jing He
Heterogeneous Fe-based electro-Fenton process has gained extensive attention for the refractory pollutants control. Nevertheless, insufficient Fe II /Fe II I cycle is still the key limitation to enhance the Fenton reaction. Herein, a strategy on the efficient Fe II /Fe III internal cycle using CoFe II Fe III -layered double hydroxides (CoFe II Fe III -LDHs) has been proposed, in which Fe species are atomically-distributed facilitating the interfacial charge-transfer and redox response. In the degradation of N,N-dimethylacetamide (DMAC), a typical organic pollutant in wastewater derived from pharmaceutical production, acrylic fibers, electronic chemicals, and fine chemical industries, the critical factors influencing degradation of DMAC were examined in detail. The degradation efficiency and the catalyst stability were investigated. CoFe II Fe III -LDHs achieved a DMAC removal of 100% within 75 min with an apparent rate constant of 0.0594·min −1 and a TOC removal of 70% after 4 h under the condition of DMAC concentration (50 mg·L −1 ), pH value (pH = 4), current density (40 mA·cm −2 ), O 2 flow rate (40 mL·min −1 ), and catalyst dosage (1.6 g·L −1 ), and the DMAC removal remained >93% after five cycles, which were both considerably superior to that only containing Fe II or Fe III . Moreover, the main free radicals and degradation pathways were elucidated according to radical capture experiments and mass spectrometry. The strategy was well tolerated in treating various organic pollutants.
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Wenhao Gao,Shiting Xu,Bingkun Kang,Zhihong Liu,Kaiqin You,Lingjun Zeng,Enqin Zheng,Bin Liu,Qian Zhang,Hongtao Song
Tumor metastasis constitutes a major obstacle in cancer treatment and affects patients' quality of life. In this study, we synthesized Fe III -shikonin nanoparticles (SF NPs) through a one-step self-assembly process utilizing shikonin (SK) and Fe III . Following the synthesis of nanoparticles, the challenges associated with the poor water solubility and the low bioavailability of SK, as well as its toxicity and adverse effects on normal tissues, could be addressed, thereby enhancing its applicability. Additionally, the synergistic effect between SK and Fe III could be achieved. These nanoparticles were subsequently modified with sodium hyaluronate (HA) to obtain tumor-targeted HSF NPs, characterized by a particle size of 171.2 nm and a zeta potential of −39.85 mV. SK could reduce LA production to improve the tumor microenvironment by downregulating PKM2 activity. Additionally, SK has been observed to downregulate MMP9 expression, resulting in decreased tumor metastasis. The exposure of tumor cells to SK and Fe III induced ferroptosis by disrupting iron ion balance and redox homeostasis. In vivo antitumor activity assessments in CT26-bearing mice demonstrated that the HSF NPs achieved a tumor growth inhibition rate of 76.94 %. By integrating these therapeutic mechanisms, HSF NPs effectively inhibited the growth of orthotopic tumors and the dissemination of metastatic tumors.
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DOI
PubMed
高影响因子
Coatings
·
2023
·Vol. 13
·期 7
·1212
·
IF 3.4
Xuefei Chen,Lubing Zha,Fangmeng Zeng,Jie Meng,Tiandi Pan,Jindan Lv
Considering photocatalytic degradation technology has recently attracted great attention for dyeing wastewater treatment, the polyacrylonitrile (PAN) nanofibrous membrane coated with the TA/FeIIIcomplexes was proposed as a novel photocatalyst in this work. The successful self-assembly of TA/FeIIIcomplexes on the PAN nanofibrous membrane after layer-by-layer deposition of TA and FeIIIwas confirmed by the analyses of chemical structure, morphology, and hydrophilicity. With the number of coating cycles, more TA/FeIIIcomplexes coated on the PAN nanofibrous membrane, which contributed to the excellent photocatalytic activity. Whereas, when the coating cycles reached seven, the photocatalytic performance of the modified PAN nanofibrous membrane deteriorated due to the serious aggregation of TA/FeIIIcomplexes. Under optimum five coating cycles, owing to its great light absorbance capability, the modified PAN nanofibrous membrane achieved 98% degradation efficiency of RhB after 360 min illumination. This work would offer a promising high-performance photocatalyst for dyeing wastewater treatment.Keywords:photocatalysis;PAN nanofibrous membrane;TA/FeIIIcomplexes;coating cycle
研究领域:
环境科学
·
材料科学
·
废水处理
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产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2024
·
IF 6
Qin Liu,Xia Zhao,Yuan Lin,Zhaohui Su
Vaccines are essential to prevent infectious diseases, but their thermal instability leads to their heavy reliance on cold-chain. Physical encapsulation is the simplest and most effective strategy to increase the thermostability of vaccines. However, traditional mineralized coatings are strictly dependent on the properties of substrate surface and synthesis conditions. Considering the instability and low surface charge density of vaccines, we developed a facile and robust approach for the protection of a single viral vaccine, tobacco mosaic virus (TMV), through tannic (TA) and FeIII metal-polyphenol networks, which significantly improved the thermostability of viral vaccine by strengthening its conformational rigidity. We found that the formed TA-FeIII nanoshell drastically enhanced the thermostability of the viral vaccine at high temperature of 100 °C and long-term storage at 37 °C. Additionally, the TA-FeIII nanoshell did not destroy the viral RNA, had excellent biocompatibility and was easily synthesized on the vaccine surface within seconds. This ease, low cost and substrate-independent approach makes TA-FeIII nanoshell as a potential candidate for vaccine applications.
研究领域:
病毒学
·
纳米技术
·
药学
·
生物医学工程
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Weiyang Dong,Yaoyao Jin,Kang Zhou,Sheng-Peng Sun,Yifan Li,Xiao Dong Chen
Ferric-nitrilotriacetate complex (Fe III -NTA) has been adopted to catalyze the photo-Fenton degradation of emerging pharmaceutical micropollutants in water and wastewater at neutral pH. The generation of hydroxyl radicals (HO ) in UVA/Fe III -NTA/H 2 O 2 was identified by using electron spin resonance (ESR) trapping technique. The effects of critical parameters (e.g., NTA:Fe III molar ratio, Fe III -NTA and H 2 O 2 dosages) on the steady-state HO concentrations were studied in terms of the degradation of carbamazepine (CBZ, as a model compound) in Milli-Q water. In addition, the degradation of pharmaceuticals mixtures (including CBZ, crotamiton (CRMT) and ibuprofen (IBP)) in wastewater effluents from a biological aerated filter (BAF) by UVA/Fe III -NTA/H 2 O 2 was studied in continuous-flow mode. The results showed that the efficacies of Fe III -NTA in catalyzing photo-Fenton degradation of pharmaceuticals in wastewater effluents were comparable to those obtained by Fe III -ethylenediamine-N,N′-disuccinic acid (Fe III -EDDS), and far exceeded other Fe III -L complex (e.g., citric acid , malonic acid, oxalic acid and tartaric acid). More than 92% degradation efficiencies of CBZ, CRMT and IBP were obtained in continuous-flow mode under the given conditions of 0.178 mM Fe III -NTA (1:1), 4.54 mM H 2 O 2 , UVA intensity 4.05 mW cm −2 , hydraulic retention time (HRT) 2 h, influent pH 7.6 (±0.2) and temperature 20 °C. The results presented herein suggest that Fe III -NTA-catalyzed neutral photo-Fenton reaction can be an alternative tertiary process for the treatment of pharmaceutical micropollutants in secondary wastewater effluents.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
Catalysts
·
2019
·Vol. 9
·期 11
·906
·
IF 3.444
Jieyang Yang,Zequan Zeng,Zhanggen Huang,Yan Cui
In this work, the activation effect of vacuum thermal treatment on MIL-101(Fe) (MIL: Materials of Institute Lavoisier) was investigated for the first time. It demonstrated that vacuum thermal activation could accelerate the activation of persulfate (PS) by MIL-101(Fe), and the enhancement of the catalytic capacity of MIL-101(Fe) was mainly attributed to the change in the FeII/FeIII mixed-valence center. The results of the SEM and XRD showed that vacuum thermal activation had a negligible effect on the crystal structure and particle morphology of MIL-101(Fe). Meanwhile, the higher temperature of vacuum thermal activation caused a higher relative content ratio of FeII/FeIII. A widely used azo dye, X-3B, was chosen as the probe molecule to investigate the catalytic performance of all samples. The results showed that the activated samples could remove X-3B more effectively, and the sample activated at 150 °C without regeneration could effectively activate PS to remove X-3B for at least 5 runs and approximately 900 min. This work highlights the often-overlooked activation effect of vacuum thermal treatment and provides a simple way to improve the catalytic capacity and reusability of MIL-101(Fe) which is beneficial for the application of MIL-101(Fe)/PS systems in azo dye wastewater treatment.Keywords:vacuum thermal activation;MIL-101(Fe);persulfate;azo dye
研究领域:
环境科学
·
催化
·
材料科学
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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）