INTEGRATED FERROELECTRICS
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2021
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IF 0.836
Yifan Zhou,Haifeng Chen,Ruipeng Hou,Liqin Zhang,Shouquan Sun,Peisong Tang
Using thulium oxide, nitric acid, ammonium metavanadate and citric acid as main raw materials, TmVO4 was successfully prepared by hydrothermal method. TmVO4 samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), thermogravimetry differential scanning calorimetry (TG-DSC), and Fourier transform infrared spectroscopy (FT-IR). Taking methyl orange solution as simulated sewage, the effects of synthesis temperature and illumination time on the photocatalytic activity of TmVO4 were studied. The results show that pure tetragonal zircon TmVO4 samples can be obtained under hydrothermal conditions of 120 °C to 180 °C. The sample prepared at 140°Chas uniform grain size, and the average grain size is about 50 nm. Under ultraviolet light illumination for 30 min, the degradation rate of 10 mg/L methyl orange can reach more than 77% in the presence of TmVO4. The photocatalysis experiment indicated that TmVO4 has good photocatalytic degradation activity for methyl orange.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Yuehui Liu,Yueyi Li,Xuguang Liu,Jiaxin Li,Yanjie Feng,Xia Li
Oxygen vacancy-rich Bi/Bi 3 TaO 7 binary nanomaterials were obtained by a simple in situ reduction . The as-prepared composite exhibited superior photocatalytic activity for the degradation of RhB compared to the single material under the visible light range. The degradation rate of the optimal sample reached 92% within 120 min, 12.25 times that of the pure Bi 3 TaO 7 . XRD and HRTEM characterization showed that the Bi metal obtained through in situ reduction was loaded on the Bi 3 TaO 7 nanostructure. In addition, XPS and EPR indicated a significant increase in the oxygen vacancy content of the composites. The time-resolved transient fluorescence spectroscopy and photocurrent results proved that the separation rate of photoexcited carriers and the corresponding ability of photoelectrons are greatly increased. It is due to the synergistic effect of the unique photo-reaction excitation pathway induced by bismuth metal plasma resonance and oxygen vacancies, which not only extends the photo-reaction to the infrared region but also increases the carrier residence time, and this is the fundamental reason for the excellent photocatalytic performance of the composite material. The h + is the main reactive radical of the reaction, and •O 2 − also plays a role. Based on the above characterization study, we propose a possible photoreaction mechanism for the synergistic oxygen vacancy and Bi metal of Bi/Bi 3 TaO 7 .
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2024
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IF 5.7
Hang Ning,Wen-long Liu,Qing-yun Li,You-yan Liu,Shi-ting Huang,Hai-bo Liu,Ai-xing Tang
Synthetic aromatic esters, widely employed in agriculture, food, and chemical industries, have become emerging environmental pollutants due to their strong hydrophobicity and poor bioavailability. This study attempted to address this issue by extracellularly expressing the promiscuous aminopeptidase (Aps) from Pseudomonas aeruginosa GF31 in B. subtilis, achieving an impressive enzyme activity of 13.7 U/mg. Notably, we have demonstrated, for the first time, the Aps-mediated degradation of diverse aromatic esters, including but not limited to pyrethroids, phthalates, and parabens. A biochemical characterization of Aps reveals its esterase properties and a broader spectrum of substrate profiles. The degradation rates of p-nitrobenzene esters (p-NB) with different side chain structures vary under the action of Aps, showing a preference for substrates with relatively longer alkyl side chains. The structure-dependent degradability aligns well with the binding energies between Aps and p-NB. Molecular docking and enzyme–substrate interaction elucidate that hydrogen bonding, hydrophobic interactions, and π–π stacking collectively stabilize the enzyme–substrate conformation, promoting substrate hydrolysis. These findings provide new insights into the enzymatic degradation of aromatic ester pollutants, laying a foundation for the further development and modification of promiscuous enzymes.
研究领域:
环境生物学
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酶学
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生物化学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Yi Ma,Jingan Li,Yifan Zhou
Magnesium alloys have become the focus of attention as a new generation of vascular stent materials due to their excellent mechanical properties and degradability. However, their rapid degradation rate and poor surface endothelialization performance have become key factors limiting their clinical application. In this study, the Mg-Zn-Y-Nd (ZE21B) surface was modified with the magnesium fluoride (MgF 2 ) corrosion-resistant layer, and the polydopamine (PDA) layer was used to immobilize the chitosan (CS)-ferulic acid (FA)/vanillic acid (VA) bioactive composite coating. The results of the electrochemical and hydrogen evolution experiments showed that the corrosion current density and hydrogen release of the modified ZE21B alloy significantly decreased, and its corrosion resistance was enhanced; the results of the hemolysis rate and whole blood experiments showed that the adhesion of blood components such as white blood cells and platelets on the surface of the modified ZE21B alloy significantly decreased, improving the blood compatibility of the magnesium alloy; the results of in vitro cell experiments showed that the modified ZE21B alloy effectively promoted endothelial cell (ECs) adhesion and proliferation, and inhibited smooth muscle cell (SMCs) pathological proliferation. These enhancements suggest that the CS-FA/VA coating significantly improves both the corrosion resistance and biological compatibility of the ZE21B alloy.
研究领域:
生物医学工程
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材料科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2024
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IF 5.4
Shiqi Xiao,Jiawei Wei,Jiangshan Liu,Li Yuan,Xue Xia,Qin Zou,Yi Zuo,Yubao Li,Jidong Li
s Polymer-based scaffolds with different degradability have been investigated to screen the matrix whose degradation rate is more closely matched with the bone regeneration rate. However, these comparisons are inclined to be compromised by the animal individual differences. In this study, we constructed an integrated scaffold model comprising four parts with different degradability and bioactivity to achieve an in situ comparison of bone regeneration ability of different scaffolds. Slow-degradable polycaprolactone (PCL), fast-degradable poly (lactic-co-glycolic acid) (PLGA), and silica-coated PCL and PLGA scaffolds were assembled into a round sheet to form a hydroxyapatite (HA)-free integrated scaffold. HA-doped PCL, PLGA, and silica-coated PCL and PLGA scaffolds were assembled to create an HA-incorporated integrated scaffold. The in vivo experimental results demonstrated that the local acid microenvironment caused by the rapid degradation of PLGA interfered with the osteogenic process promoted by PCL-based scaffolds in defect areas implanted with HA-free integrated scaffolds. Since the incorporation of HA alleviated the acidic microenvironment to some extent, each scaffold in HA-incorporated scaffolds exhibited its expected bone regeneration capacity. Consequently, it is feasible to construct an integrated structure for comparing the osteogenic effects of various scaffolds in situ, when there is no mutual interference between the materials. The strategy presented in this study inspired the structure design of biomaterials to enable in situ comparison of bone regeneration capacity of scaffolds.
研究领域:
生物材料学
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组织工程学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2018
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IF 2.746
Qinggong Ren,Chong Yin,Zhihui Chen,Maocun Cheng,Yuting Ren,Xiaoyan Xie,Yuheng Li,Xi Zhao,Ling Xu,Hongshun Yang,Weimin Li
In this study, we selected the stainless-steel mesh as the electrode material , supplemented with conventional power ultrasound in the electrochemical degradation of the chlorpyrifos effluent. The effect of different operating conditions, such as voltage, initial electrolyte concentration, temperature and ultrasonic power were investigated with synthetic effluent to gain the most efficient degradation rate . The best reaction parameters were: voltage of 20 V, electrolyte concentration of 2 mg L −1 , ultrasonic power of 200 W, as well as 20 °C, which led to 93.3% and 72.8% of degradation in US-EC and EC system. Applying higher concentrations of electrolyte (sodium sulfate) and higher voltages, the chlorpyrifos solution can be more efficiently degraded with a high synergy of 37%. The degradation of chlorpyrifos followed pseudo-first-order kinetics.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2016
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IF 3.42
Hong Gao,Meng Zhang,Jin Zhao,Lilan Gao,Mingshuo Li
The biocompatibility, ultimate loading capacity and biodegradability of magnesium alloy make it an ideal candidate in biomedical fields. Fabrications of multilayered coatings carrying sodium alginate (ALG), chitosan (CHI) and mechano-growth factor (MGF) on fluoride-pretreated ZEK100 magnesium alloy have been obtained via layer by layer (LBL) to reduce the degradation rate of magnesium alloy in this study. The modified surfaces of ZEK100 substrates were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared (FTIR) and CARE EUT-1020 tester. Results reveal that multilayer-coated magnesium alloy can be successfully obtained with smooth surface morphology, and the mechanical properties of coated samples are almost the same as those of uncoated samples. However, the fatigue life of coated ZEK100 is slightly larger than that of uncoated samples after 1 day of immersion. By comparing the degradation of uncoated and multilayer-coated ZEK100 samples in vitro and in vivo , respectively, it is found that the degradation rate of ZEK100 samples can be inhibited by LBL modification on the surface of the sample; and the corrosion rate in vivo is lower than that in vitro , which help solve the rapid degradation problem of magnesium alloy. In terms of the visible symptom of tissues in the left femur medullary cavity and material responses on the surface, multilayer-coated ZEK100 magnesium alloy has a good biocompatibility. These results indicate that multilayer-coated ZEK100 may be a promising material for bone tissue repair.
研究领域:
生物医学工程
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材料科学
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组织工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
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2021
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IF 4.089
Chunying Min,Yuzi Yang,Hongyu Liang,Zengbao He,Qiuying Li,Jinfeng Zhu,Kan Zhang,Haiting Shi,Wei Wang
The isomeric poly(hexahydrotriazine)s (PHTs) were prepared, based on their hemiaminal dynamic covalent networks via a facile method at 50 °C, through 1,3-bis(4-aminophenoxy)-benzene (TPE-R) and 1,4-bis(4-aminophenoxy)-benzene (TPE-Q) with formaldehyde. The influence of chain isomerism on thermal stability, mechanical properties, tribological properties, and the degradation rate of PHTs was investigated. The advantage of (TPE-Q)-PHTs compared with that of (TPE-R)-PHTs is that they possessed a higher glass transition temperature (Tg) of 187 °C, a higher Yang’s modulus of 10.7 GPa, and rapid degradation rate. Additionally, the (TPE-Q)-PHTs exhibited outstanding self-lubricating performance as compared to (TPE-Q)-PHTs because the para-connecting isomers showed lower surface energy, lower surface roughness, and higher hardness that effectively weakened the bonding force between friction pairs. Overall, the study of PHTs facilitates their practical application of energy conservation and environmental protection in the tribological industry.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Cleaner Production
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2021
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IF 9.297
Yiming Zhou,Mohamed Elchalakani,Peng Du,Chuanzhi Sun
Treating petroleum pollution in the ocean by use of photocatalytic techniques has become a hot topic in recent years, but the existing methods that degrade petroleum by photocatalytic techniques are still limited. This paper proposed an approach to clean up oil pollution in the ocean with marine structures constructed of photocatalytic concrete. The photocatalytic concrete was prepared by using a photocatalyst (Na-g-C 3 N 4 ) and ordinary concrete. The Na-g-C 3 N 4 was created from waste melamine and NaCl and was then combined with the concrete surface. In this way, the surfaces of marine concrete structures would have the capability to degrade petroleum films on the sea surface under sunlight. To test the performance of photocatalytic concrete, we conducted degradation experiments, and seven influencing factors (e.g., irradiation time, irradiation intensity, irradiation angle, time of wave scouring, height of photocatalytic region, pH and seawater temperature) were also considered. The experimental results showed that the degradation rates of petroleum hydrocarbons by photocatalytic concrete could reach approximately 50%. Among the seven influencing factors, the first five factors could influence the degradation process significantly, while the pH and temperature of seawater do not play an important role in photocatalytic degradation . Based on the observations of the trials, it was found that the degradation rate was limited to about 50% due to the thickness of the petroleum film. When the film thickness is not sufficient to support the formation of petroleum film, the photocatalytic degradation process will stop. Our study represents a successful attempt to combine the fields of clean energy, photocatalysis , environmental pollution control and building materials , as well as to provide a new method to clean up petroleum pollution by photocatalytic techniques. We will demonstrate that photocatalytic concrete can effectively degrade oil films on the surface of the ocean in complex marine environments, so it is feasible to use marine photocatalytic concrete structures to eliminate petroleum pollution in the ocean.
研究领域:
环境科学
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材料科学
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海洋学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Jin Guo,Yihua Sun,Ruofei Xiang,Haizhou Yu,Zhe Chen,Fengchen Zhang,Feilong Liu
The application of graphitic carbon nitride (g-C 3 N 4 ) as a non-metallic photocatalyst for removing harmful pollutants in the wastewater environment has received considerable attention in recent years. Nevertheless, its low activity is primarily restricted by a high rate of charge carrier recombination. Herein, a green and straightforward method for synthesizing small-sized porous thin g-C 3 N 4 nanosheets directly from urea solution has been developed. This new photocatalyst can effectively remove 99.3% of rhodamine B within 15 min, exhibiting a degradation rate 16.8 times greater than that of conventionally synthesized bulk g-C 3 N 4 , under visible light irradiation . Additionally, this photocatalytic efficiency is comparable or even superior to that of previously reported literature, while requiring significantly less catalyst usage. From the experimental results, we have confirmed that the outstanding structural property as well as the stronger oxidizability of the valence-band holes (h + ) are responsible for its greater photocatalytic activity . Its increased specific surface area and abundant pore structure significantly improve contaminant adsorption and charge separation and transfer. Meanwhile, the positive shift of the valence band enhances the oxidation of photogenerated h + , resulting in higher photocatalytic activity . This work can provide newly insights for designing highly efficient and easily-constructed g-C 3 N 4 photocatalysts for practical photocatalytic water treatment applications.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Haicheng Huang,Chaopei Chen,Somia Yassin Hussain Abdalkarim,Yuheng Liu,Kaiwei Chen,Sherif Mehanny,Hou-Yong Yu
Polylactic acid (PLA) is widely used in crop protection but faces challenges such as low toughness and unpredictable degradation rates. This study addresses these limitations by developing a green and durable mulch film incorporating citric acid-modified cellulose nanocrystals (CA-CNC) as an interfacial compatibilizer in PLA. Adding CA-CNC enhances the orientation of PLA molecular chains, thereby improving tensile ductility. Specifically, incorporating 5 % CA-CNC significantly increased tensile strength by 28.2 %, while toughness surged by 190.1 %. Mulch films were subjected to indoor UV light and outdoor degradation in soil and cultivation environments (using soybean as a case study) to explore degradation mechanisms. Notably, the mulch film with 5 % CA-CNC completely fragmented after 140 days of soil degradation, representing a higher degradation rate of 31.9 %. Meanwhile, the degradation rates observed after 90 days of outdoor cultivation environment degradation (9.8 %) and 30 days of indoor UV degradation (2.8 %) exhibit distinctions compared to outdoor soil degradation. Further analyses of changes in the physicochemical properties of mulch film confirmed the degradation mechanisms. This study provides valuable insights for estimating short-term indoor and long-term outdoor degradation of mulch films, underlining their significance in sustainable agricultural practices.
研究领域:
材料科学
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农业科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
ChemSusChem
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2025
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IF 6.6
Kangzhi Deng,Kai Feng,Huan Li
Biomass waste, a renewable energy source, can be converted into electricity through electrochemical processes. Liquid catalytic fuel cells (LCFCs) have garnered increasing attention due to their ability to utilize complex biomass fuels directly. However, conventional LCFCs face challenges related to the cross-membrane permeation of catalysts, which leads to electrolyte imbalance and cell failure. To address the issue, this study proposed a novel LCFC system using the same catalyst, molybdovanadophosphoric heteropolyacid (PMoV), on both the anode and cathode, effectively mitigating catalyst permeation. Under ambient conditions, the PMoV-LCFC system achieved a maximum power density of 3.39 mW/cm2 using glucose as the fuel, and the system demonstrated stable performance over five days. Notably, cyclic discharge tests using expired bread as fuel further show the system's effectiveness. The TOC degradation rate reached a maximum of 23.36%, and formic acid was the primary intermediate. The PMoV-LCFC system effectively reduced catalyst crossover and maintained stable electrochemical performance, offering new insights for designing biomass fuel cells and significantly contributing to waste management.
研究领域:
能源科学
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环境科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）