CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Junchuan Zhang,Yuan Yan,Andac Armutlulu,Kexin Wei,Jian Wu,Bo Lai,Ruzhen Xie
Heterojunctions present a promising avenue for improving charge separation in photocatalytic water purification processes. However, the multicomponent heterojunction interfaces often act as recombination centers for photogenerated carriers. Herein, a Ti-based homologous-like heterojunction was fabricated by in-situ growth of controllable CaTiO 3 on sulfur-doped TiO 2 (STCTO). This heterojunction exhibits outstanding performance in photocatalytic water decontamination when assisted by peroxymonosulfate (PMS). The well-matched interfaces within the heterojunction generate internal electric fields that facilitate efficient electron migration from ST to CTO by minimizing the energy barrier. PMS serves as a dual function as an electron-acceptor to enhance carriers separation efficiency, and as a precursor for sulfate radical generation, thereby promoting the production of reactive species. Consequently, the homologous-like heterojunction STCTO enables complete Atrazine removal without any deterioration even after 8th recycle. These findings underscore the synergistic effects of photo-energized and PMS-intensified homologous heterojunctions, providing insights into a novel approach for the removal of refractory hazardous organic contaminants using solar energy.
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
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2025
·
IF 4.9
Xinxin Liu,Zhengfei Hong,Rongrong Li,Shuxian Hou,Xuechao Shi,Guoqiang Yang,Yuxuan Wang,Yimei Wang,Zhiru Tao,Jun Ge,Fei Ge,Yiyan Song,Jun Wang
Wound infections caused by surgery, chronic ulcers, or trauma have been a challenge for clinicians, especially multiple resistant bacteria induced by the misuse of antibiotics, which has increased the risk of bacterial infection. It is very urgent to design and develop antimicrobial materials with potential for clinical application against drug-resistant bacterial infections. In this study, a photothermal montmorillonite-chitosan hydrogel system (MNT-CS Gel) was fabricated as a photothermal antimicrobial dressing. This study found for the first time that montmorillonite (MNT) has good photothermal properties and photothermal conversion efficiency under near-infrared (NIR) light, and on this basis, its application research was carried out. The MNT possesses broad-spectrum antibacterial activity with significant inhibitory effects against E. coli and S. aureus, excellent photothermal stability under NIR light. And all the performances were improved after combining with CS-Gel, especially in bacterial adsorption capacity and photothermal performance. Notably, MNT-CS Gel was used as a photothermal antibacterial agent for the first time, and the antibacterial effects in vitro and their mechanisms have been systematically investigated. It was found that the MNT-CS Gel had significant inhibitory and destructive effects on bacteria in an in vitro pigskin model. The MNT-CS Gel could adsorb the bacteria strongly, inhibit bacterial biofilm formation, induced the generation of ROS, destroy the structure of bacteria, and cause the leakage of nucleic acids. The MNT-CS Gel demonstrated good photothermal antimicrobial properties, suggesting that the MNT-CS Gel has potential for clinical hygiene applications.
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JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2010
·Vol. 48
·期 23
·5364-5374
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IF 3.971
You-Mei Bao,Xiao-Hui Liu,Xiu-Lan Tang,Yue-Sheng Li
A series of novel hyperbranched poly(ester-amide)s (HBPEAs) based on neutral α-amino acids have been synthesized via the “AD + CBB′” couple-monomer approach. The ABB′ intermediates were stoichiometrically formed through thio-Michael addition reaction because of reactivity differences between functional groups. Without any purification, in situ self-polycondensations of the intermediates at elevated temperature in the presence of a catalyst afforded HBPEAs with multihydroxyl end groups. The degrees of branching (DBs) of the HBPEAs were estimated to be 0.40–0.58 and 0.24–0.54 by quantitative 13 C NMR with two different calculation methods, respectively, depending on polymerization conditions and structure of monomers. The influences of catalyst, temperature, and intermediate structure on the polymerization process and molecular weights as well as properties of the resultant polymers were investigated. FTIR, NMR, and DEPT-135 NMR analyses revealed the branched structure of the resultant polymers. The HBPEAs possess moderately high molecular weights with broad distributions, glass transition temperatures in the range of −25.5 to 36.5 °C, and decomposition temperatures at 10% weight loss under nitrogen and air in the regions of 243.4–289.1 °C and 231.4–265.6 °C, respectively. Among them, those derived from D , L -phenylalanine display the lowest degree of branching, whereas the highest glass transition temperature and the best thermal stability. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2010
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SEPARATION AND PURIFICATION TECHNOLOGY
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2017
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IF 3.359
Chunli Liu,Hongchao Mao,Jianhua Zhu,Suobo Zhang
The original quaternized cardo poly(arylene ether sulfone)s (QPES-I) ionomers was employed as the virgin polyelectrolyte and its counterions (I − ) were exchanged with F − and PF 6 − to prepare QPES with different anions(QPES-X, X = F, PF 6 ), then QPES-X/PSF blended ultrafiltration membranes was prepared by the nonsolvent induced phase inversion process. Scanning electron microscopy (SEM) was used to characterize the cross section morphology and surface morphology of blended membranes, and atom force microscopy (AFM) was employed for obtaining the three-dimensional images of QPES-X/PSF blended membranes, respectively. The surface chemical composition of the asymmetric membrane was investigated by X-ray photoelectron spectroscopy (XPS). Under similar preparation conditions, the water contact angle on membrane surface increased in the order of QPES-F < QPES-I < PSF < QPES-PF 6 , while the pure water flux of the membranes decreased with that order. The results revealed that the surface and cross section morphology, surface roughness, QPES-X content on membrane surface, as well as the hydrophilicity and performance of blended membranes were closely related to the counterions of QPES-X. Membrane prepared with QPES-F is hydrophilic and possesses outstanding performance among all the investigated materials, demonstrating a water flux of 2163 L m −2 h −1 and BSA rejection of 93% at an 18 wt% polymer concentration and 15% QPES-F content. Antimicrobial activity studies demonstrate that the blended membrane having 15% QPES-F possess a sterilization rate of 73% towards E . coli .
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Pharmaceutics
·
2024
·Vol. 16
·期 3
·344
·
IF 4.9
Juliana Palungan,Widya Luthfiyah,Apon Zaenal Mustopa,Maritsa Nurfatwa,Latifah Rahman,Risfah Yulianty,Nasrul Wathoni,Jin-Wook Yoo,Nurhasni Hasan
Self-healing hydrogels often lack mechanical properties, limiting their wound-dressing applications. This study introduced S-Nitrosoglutathione (GSNO) to self-healing hydrogel-based wound dressings. Self-healing hydrogel mechanical properties were improved via polymer blends. Applying this hydrogel to the wound site allows it to self-heal and reattach after mechanical damage. This work evaluated polyvinyl alcohol (PVA)-based self-healing hydrogels with borax as a crosslinking agent and carboxymethyl chitosan as a mechanical property enhancer. Three formulations (F1, F4, and F7) developed self-healing hydrogels. These formulations had borax concentrations of 0.8%, 1.2%, and 1.6%. An FTIR study shows that borate ester crosslinking and hydrogen bonding between polymers generate a self-healing hydrogel. F4 has a highly uniform and regular pore structure, as shown by the scanning electron microscope image. F1 exhibited faster self-healing, taking 13.95 ± 1.45 min compared to other formulations. All preparations had pH values close to neutrality, making them suitable wound dressings. Formula F7 has a high drug content (97.34 ± 1.21%). Good mechanical qualities included high tensile stress–strain intensity and Young’s modulus. After 28 h of storage at −20 °C, 5 °C, and 25 °C, the self-healing hydrogel’s drug content dropped significantly. The Korsmeyer–Peppas release model showed that the release profile of GSNO followed Fickian diffusion. Thus, varying the concentration of crosslinking agent and adding a polymer affects self-healing hydrogels’ physicochemical properties.
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MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Yuvarajgouda N. Patil,Manjunath B. Megalamani,D.A. Ayush Gowda,Sharanappa T. Nandibewoor,Shivashankar Hiremath
This study focuses on developing a rapid, easy-to-use, and sensitive sensor for the electroanalytical detection of Metaxalone (MXL) for the first time. A novel sensor was created by combining sulfur-incorporated graphitic carbon nitride (S-GCN) with tungsten-doped titanium oxide nanoparticles (W: TiO 2 NPs) in a carbon paste, which was then loaded into a polytetrafluoroethylene (PTFE) tube. The synthesized modifiers were characterized using SEM, XRD, and FTIR techniques to understand their structural, morphological, and functional features, contributing to the electrocatalytic activity of the modified sensor (W: TiO 2 /S-GCN@CPE). Comparative analysis showed that W: TiO 2 /S-GCN@CPE achieved higher detection currents than the unmodified carbon paste electrode (CPE). Cyclic voltammetry (CV) and square wave voltammetry (SWV) were used to detect and quantify MXL electrochemically. The electrode’s physicochemical properties were studied under optimal conditions within a potential range of 0.3 V to 1.5 V. The W: TiO 2 /S-GCN@CPE showed a detection limit of 0.85 x 10 -8 M and demonstrated linearity over a concentration range of 0.1–100 x 10 -7 M. The sensor’s selectivity against interference from metal ions was also assessed. In practical applications, the developed electrode effectively detected MXL in spiked water, tablets, and biological samples, showing significant detection capacity and good recovery rates. Additionally, the electrode demonstrated stability across multiple measurements, positioning W: TiO 2 /S-GCN@CPE as a promising sensor for MXL detection.
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ChemSusChem
·
2024
·
IF 7.5
Qiuping Zhou,Xinyuan Jiang,Xuecheng Zhang,Dawei Wang,Guang Yang,He Zhou,Yuchao Wu,Fang Guo,Ming Chen,Guowang Diao,Lubin Ni
Graphical A Polyoxomolybdate-based metal-organic framework-derived Cu-embedded molybdenum dioxide hybrid nanoparticles was first applied as sulfur host in aluminum-sulfur batteries to resolve remaining critical challenge of polysulfide shuttle effect. The pouch cell with Cu/MoO 2 @C cathode cycled at 100 mA g −1 exhibits an initial discharge capacity of 150 mAh g −1 and maintains 100 cycles. High-performance rechargeable aluminum-sulfur batteries (RASB) have great potential for various applications owing to their high theoretical capacity, abundant sulfur resources, and good safety. Nevertheless, the practical application of RASB still faces several challenges, including the polysulfide shuttle phenomenon and low sulfur utilization efficiency. Here, we first developed a synergistic copper heterogeneous metal oxide MoO 2 derived from polymolybdate-based metal-organic framework as an efficient catalyst for mitigating polysulfide diffusion. This composite enhances sulfur utilization and electrical conductivity of the cathode. DFT calculations and experimental results reveal the catalyst Cu/MoO 2 @C not only effectively anchors aluminum polysulfides (AlPSs) to mitigate the shuttle effect, but also significantly promotes the catalytic conversion of AlPSs on the sulfur cathode side during charging and discharging. The unique nanostructure contains abundant electrocatalytic active sites of oxide nanoparticles and Cu clusters, resulting in excellent electrochemical performance. Consequently, the established RASB exhibits an initial capacity of 875 mAh g −1 at 500 mA g −1 and maintains a capacity of 967 mAh g −1 even at a high temperature of 50 °C.
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JOURNAL OF STORED PRODUCTS RESEARCH
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2024
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IF 2.7
Jingyi Su,Zhaoxin Cao,Yueyang Mao,Wen Shen,Xinyu Wang,Siyu Zhang,Yanqi Chen,Xueme Ge
The S/O/W method of solvent evaporation was utilized in this work for manufacturing poly ( ε −caprolactone) (PCL) microspheres loaded with 1−methylcyclopropene (1−MCP−α−CD) and eugenol (EUG) for temperature- and humidity-regulated EUG release. The composite microspheres with higher encapsulation efficiency (71.39 % ± 2.71 %) were attained by optimizing the rotation speed and mass ratio of PCL to composite powder . The microspheres had good spherical shape without large pores. The rate of release could be managed by different temperature and relative humidity conditions with the release of microspheres (96.82 % ± 0.81 % in 12 days) at the temperature of 60 °C (90 % relative humidity) and (86.50 % ± 2.71 % in 12 days) at the 90 % relative humidity (60 °C). Microsphere encapsulation of EUG and 1−MCP−α−CD was demonstrated by Fourier transform infrared spectroscopy and X-ray diffractometer. Thermal gravity analysis demonstrated that the degradation of EUG@β−CD and 1−MCP−α−CD was delayed after encapsulation. The deterioration of loquat (Baiyu, white-fleshed) can be postponed after treatment of EUG/1-MCP composite microspheres. Relative conductivity, total soluble solids, hardness, color, titratable acid , and weight loss of the loquat were also improved. It could significantly inhibit polyphenol oxidase (PPO) and peroxidase (POD) activities and inhibited browning of loquat tissue. EUG/1−MCP composite microspheres we formulated in this work might be employed to increase the shelf life of loquat.
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POLYMER
·
2024
·
IF 4.1
Feng Guo,Ke Xu,Zhao Ke,Hao Zhang,Guangtao Qian,Hui Li,Dandan Li
In this paper, we present a synthetic strategy for N-phenyl substituted benzimidazole-derived diamines, including 2-(4-(4-aminophenoxy) phenyl)-1-phenyl-1H-benzo[d]imidazole-5-amine (para-diamine) and 2-(3-(4-aminophenoxy) phenyl)-1-phenyl-1H-benzo[d]imidazole-5-amine (meta-diamine). Two distinct series of N-phenyl substituted poly (benzimidazole imide)s (PBIPIs) were synthesized via reaction with different aromatic dianhydrides. The simulation reveals distinct amine reaction activities of two diamine monomers. The obtained PBIPIs exhibit exceptional heat resistance attributed to N-phenyl substituted benzimidazole (BI). The temperature at which weight loss of 5 % (T 5% ) is in the range of 491–595 °C under N 2 environment, while the glass transition temperature is 237–329 °C. The PBIPIs exhibit specific solubility characteristics due to the flexible ether linkage groups' non-coplanarity and bulky pendant benzene groups. The PBIPIs possess tensile strength between 108 and 142 MPa, a tensile modulus of 4.0–5.9 GPa, and an elongation at a break of 4.2–26.4 %, indicating excellent mechanical properties. Additionally, the PBIPI with controlled molecular weight generated from BPADA incorporating 2-(3-(4-aminophenoxy) phenyl)-1-phenyl-1H-benzo[d]imidazole-5-amine (B-BPADA-PA) demonstrates exceptional melt processability. B-BPADA-PA possesses remarkable melt stability since its minimum complex viscosity is only 2100 Pa⋅s at 400 °C, and its melt viscosity ratio is 1.34 at 380 °C.
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Sustainability
·
2024
·Vol. 16
·期 20
·9051
·
IF 3.3
Huali Zhang,Kanghui Zhang,Qin Liu,Tongshan Shi,Jiaheng Cui,Jinxiu Li
This study presents a novel Fe-CNs-P/S carbon composite material, synthesized by doping elements P and S into NH2-MIL-101 (Fe) using the carbonization method. The material’s application in sustainable water treatment was evaluated, focusing on its effectiveness in activating persulfate for pollutant degradation. The research thoroughly investigates the synthesis process, structural characteristics, and performance in degrading pollutants. The results indicate that Fe-CNs-P/S-5 with 50% P and S co-doping is higher than that of other samples, where the degradation rate of TC in 30 min is as high as 98.11% under the optimum conditions, that is temperature at 25 °C, 0.05 g/L of catalyst concentration, and 0.2 g/L of PMS concentration. The composite material demonstrates robust versatility and stability, maintaining high degradation efficiency across multiple organic pollutants, with no significant reduction in catalytic performance after four cycles. Furthermore, the free radical quenching experiments display that the singlet oxygen1O2is the main active species. It is demonstrated that the doping of P and S play a role in the enhancement of PMS activation over the Fe-CNs-P/S catalyst. This material demonstrates remarkable efficacy in treating a range of organic contaminants and exhibits excellent reusability, presenting a promising approach for enhancing sustainability in water treatment applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Xiang Li,Yunyi Wang,Ting Wu,Guigan Fang
The graphitic carbon nitride (g-C 3 N 4 ) photocatalysis has emerged as a clean method for cleaving lignin-linked bonds due to its mild and sunlight-driven reaction conditions. The fast electron–hole pair complex of g-C 3 N 4 constrains its degradation efficiency, making the heterojunction construction a popular solution. The conventional methods of preparing g-C 3 N 4 heterojunctions by physical mixing destroy π-conjugations in g-C 3 N 4 , reducing the adsorption of lignin containing benzene rings. In this study, a novel indium oxide (In 2 O 3 ) quantum dot–g-C 3 N 4 0D/2D heterojunction was prepared through the high-temperature oxidation of pre-prepared indium-doped g-C 3 N 4 . The introduction of In 2 O 3 at the quantum dot level minimizes the interference with lignin adsorption capacity. The strong combination of the two (In 2 O 3 and g-C 3 N 4 ) increases the intersection interface area, promoting the S-scheme transfer route of the photogenerated electrons. Consequently, this enhances the photoelectric conversion efficiency and carrier lifetime of the heterojunction, and inhibits the rapid recombination of photogenerated electron–hole pairs in g-C 3 N 4 . The proposed heterojunction was 3 times more efficient than g-C 3 N 4 alone for selective cleavage of lignin β–O–4 bonds after 2 h of sunlight irradiation. Combined with inhibitor experiments and gas chromatography–mass spectrometry analysis, this paper defines the reactive oxides and proposes a cleavage pathway for the lignin β–O–4 bonds in In 2 O 3 –g-C 3 N 4 heterojunction system.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Ying Tian,Kunfeng Zhang,Haoran Zhao,Bo Peng,Jinxia Liang,Hongxia Chen,Runfeng Huang,Yuanyuan Wei,Hanyu Chen
Novel 2D/2D TiO 2 /BiOBr (TOB- x , x represented the molar ratio of TiO 2 /BiOBr) heterostructures with dual oxygen vacancies were fabricated via an in-situ hydrothermal approach. Owing to the construction of p-n heterostructure and strong interface interaction, a S-scheme charge transfer path was formed, which facilitated efficiency separation and transfer of charge and retained strong redox capacities of photoexcited electrons and holes. Simultaneously, the introduction of oxygen vacancies induced strong photoabsorption, improving the light harvesting capacity. The oxytetracycline (OTC) degradation efficiencies over TOB-0.05 and TOB-0.1 were significantly improved relative to those of single components. The TOB-0.1 photocatalyst displayed the best photocatalytic activity, which was 3.75 and 1.76 times higher those of TiO 2 -Vo and BiOBr-Vo, respectively. Furthermore, we also examined the effects of pH, ions, and water matrixes on OTC conversion of TOB-0.1, and investigated the photocatalytic degradation mechanism. This work provides a useful guideline for constructing high-efficiency photocatalysts for wastewater treatments by combining 2D/2D heterojunction and dual-defect engineering.
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