JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Cijun Shuai,Chong Lin,Chongxian He,Wei Tan,Shuping Peng,Wenjing Yang
Bone implant-associated bacterial infection is a common cause of transplant failure. Chemodynamic therapy (CDT) has significant antibacterial efficacy by producing reactive oxygen species (ROS). However, the ROS permeability is restricted by the natural barrier of bacterial biofilms. Herein, a hard-soft magnetic biphasic nanoparticle (CF@MF) was synthesized by in-situ growth of the soft MnFe 2 O 4 shell on the hard CoFe 2 O 4 core. Then, the CF@MF was incorporated into poly- l -lactide powders to prepare porous scaffolds by selective laser sintering. The scaffold exhibited superior magnetothermal conversion efficiency, which was attributed to the interfacial exchange coupling of CF@MF. Importantly, the scaffold effectively dispersed biofilms by magnetothermal therapy (MTT), favoring numerous ROS pre-generated by CDT to enter the interior to kill bacteria. This study provided a synergistic MTT/CDT strategy to eradicate deep bacterial infections in biomedical application.
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高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Xiaochen Zhang,Jiahong Jian,Zisheng Luo,Guo Li,Yifeng Huang,Yue Wu,Dong Li,Li Li
The fabrication of multi-component film with colloidal particles could be inconvenient. A novel “swell-permeate” (SP) strategy was proposed to form homogeneous multi-component films. The SP strategy allows colloidal particles to fit into the polymer network by stretching the polymer chains assisted by water. We demonstrated the strategy by creating films with polysaccharide substrates as β-cyclodextrin grafted chitosan (CS) with nanocellulose. The addition of nanocellulose significantly increased the mechanical properties and the barrier performance of the films. The size of nanocellulose particles in affecting mechanical properties was investigated by applying different length of cellulose nanocrystal (CNC), the longer of which, due to denser physical entanglements, showed a better increase to the film in the elastic modulus and tensile strength to 4.54-fold and 5.71-fold, respectively. The films were also loaded with ethyl- p -coumarate (EpCA) and had an enhanced performance in anti-microbial for Altenaria alternata , Salmonella typhi , and Escherichia coli . The anti-oxidative property was increased as well, and both effects were valid both in vitro and in ready-to-eat apples. The strategy provides a practical and convenient method for fabricating colloidal particle containing films, and the novel idea of “swell-permeate” is potentially regarded as a new solution to the challenge of ready-to-eat food quality maintenance.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Pengcheng Xiang,Lili Wang,Qin Geng,Changyan Guo,Hongtao Xie,Yizhao Li,Yangyang Yu,Jide Wang
Structural design of semiconductor photocatalysts plays an important role in promoting light absorption, molecular activation, and charge separation in the CO 2 reduction reaction, which is beneficial for improving photocatalytic activity. In this paper, a simple photodeposition strategy was employed to load Cu onto Bi 2 O 2 SO 4 and form a Cu-Bi alloy. Under simulated sunlight conditions, the optimal catalyst demonstrates impressive photocatalytic activity and selectivity for CO 2 reduction, with a corresponding yield of 18.8 μmol g -1 h -1 , 15 times higher than that of pure Bi 2 O 2 SO 4 , and CO selectivity reaching 97.1%. The results indicate that metal deposition enhances light absorption utilization efficiency and promotes the separation and transfer of photogenerated carriers. Additionally, the combination of in-situ FT-IR spectra and theoretical calculations reveal the molecular mechanisms of photocatalytic CO 2 reduction. This work discusses the synergistic effect of metal deposition and oxygen vacancies on photocatalytic reduction of CO 2 , providing a feasible method for constructing metal deposition structures with defects.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Shuqi Gong,Rongyu Zhang,Chengji Sui,Yunlei Zhou,Zhengkun Yu,Li Ma,Huanshun Yin,Tianyi Sun,Junling Duan
Bi/Bi 2 O 2 CO 3 composite photocatalytic materials with oxygen vacancies were synthesized in one step by a hydrothermal method using bismuth nitrate pentahydrate as the bismuth source and N,N-dimethylformamide as the carbon source and reducing agent. The photocatalytic degradation performance of Bi/ Bi 2 O 2 CO 3 under simulated sunlight was investigated using the environmental hormone pollutant bisphenol A as the degradation target. The results show that the synergistic effect of Bi metal plasmon resonance effect (SPR) and oxygen vacancies promotes the effective separation of photogenerated electrons and holes, which greatly improves the photocatalytic ability. The degradation rate of Bi/Bi 2 O 2 CO 3 for bisphenol A (85.2 %) is 2.67 times higher than that of the single-component material Bi 2 O 2 CO 3 (31.9 %).The effect of external conditions (pH, anions, cations) on the photocatalytic performance was investigated. As well, ESR and active intermediate species capture experiments were performed on the composites, and it was deduced that h + , 1 O 2 , and ·O 2 - were the main reactive substances in this reaction system. And toxicity experiments were conducted on the degradation products, which proved that the toxicity of the degradation products was reduced.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiaoxiao Zhou,Xiaoyan Peng,Haoyu Xu,Yijin Hao,Hezhang Li,Bo-ping Zhang
BiFeO 3 -BaTiO 3 (BF-BT) ceramics are an excellent choice for high-temperature lead-free piezoelectric ceramic due to their high Curie temperature and good piezoelectric properties , but the volatilization of Bi leads to the formation of A-site cationic vacancies and oxygen vacancies , culminating in heightened leakage currents and detrimental effects on piezoelectric properties. In this study, a chemical composition of 0.70Bi (1+ x ) Fe 0·97 Al 0·03 O 3 -0.30BaTiO 3 ceramics, abbreviated as B 1+ x FA-BT, where 0 ≤ x ≤ 0.05, were synthesized, with special attention on the effects of Bi compensation and poling process on their insulation and piezoelectric properties. Due to the coexistence of R - PC phases and low leakage current, B 1+ x FA-BT ceramics exhibit excellent piezoelectric properties and high Curie temperature, among which the B 1.02 FA-BT ceramic boasts optimal overall properties: d 33 = 196 pC N −1 , T C = 480 °C, k p = 34%, θ max = 49.5° and Q m = 32, under optimal poling parameters E p = 50 kV cm −1 and T p = 100 °C. The poling process is directly linked to the reorientation of domains, the redistribution of positive/negative space charge and the aggregation or injection of holes, which is achieved by tuning the poling field and temperature in a ceramic with optimal integrated piezoelectric properties. The poling process of BF-BT ceramics is significantly influenced by their leakage characteristics, which can have a significant impact on their overall performance. Optimizing electrical poling conditions and minimizing leakage current is crucial to achieving favorable piezoelectric properties in BF-BT ceramics with R - PC coexisting structures.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhiang Hou,Jinzhu Yue,Hao Chen,Jinnan Wang,Aimin Li,Philippe François-Xavier Corvini
Endocrine disrupting chemicals (EDCs) interfere with the normal secretion, transport and metabolism of human hormones, thus affecting neurological, reproductive and immune functions. Photocatalysis is regarded as a facile organic degradation technique. The construction of heterojunctions can modulate the reactive oxygen species and enhance the photocatalytic performance of semiconductors. However, poor contact interfaces still severely limit carrier separation and transfer. Herein, we have doped Co to modulate the band structure of Bi 2 O 2 CO 3 while facilitating the in situ growth of BiOI on its surface via shared Bi atoms. This approach led to the development of a 2D/2D Co-Bi 2 O 2 CO 3 /BiOI (Co-BOC/BiOI) S-scheme heterojunction characterized by atomically close contact interfaces. Furthermore, the photo-electrochemical characterization results indicate that the light adsorption capacity, carrier separation and transport efficiency of the optimized Co-BOC/BiOI-3 are greatly improved. This system demonstrates almost 100% removal rate for three typical EDCs within 60 min. The degradation kinetic constants show an improvement by an order of magnitude compared to single BiOI and Bi 2 O 2 CO 3 . More importantly, O 2 •﹣ , which is produced from O 2 reduction on high negative conduction band, can be subsequently oxidized into 1 O 2 by photogenerated hole. Electron paramagnetic resonance and quenching experiments indicate that the organics degradation process is dominated by 1 O 2 . This work offers new insights into the construction of high-quality S-scheme heterojunction interfaces for modulation of reactive oxygen species.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 2
·e56342
·
IF 2.7
Dongchen Chen,Yan Li,Jinzhe Li,Yaru Wang,Hao Ye,Mengyao Zhao,Wanjing Li,Bin Yang,Xianglong Li
To solve the problem of cytotoxicity for most antimicrobial agents loaded in packaging materials, we developed a novel bi-layer fibrous membrane by using centrifugal spinning, which of the outer layer was submicron native potato starch/polyvinyl alcohol (ST/PVA) composite fibers loaded with ZnO nanoparticles (ZnO NPs) for providing high antibacterial activity. The inner layer was nano-based calcium alginate/polyethylene oxide (CA/PEO) fiber for providing excellent biocompatibility. The addition of ZnO caused the semicrystalline structures of ST/PVA fibers, while the CA/PEO fibers were shown semicrystalline structures due to the PEO. Fourier transform infrared indicated that posttreatment had not effect on the structures of ST/PVA/ZnO fiber, but the structure of CA/PEO fibers were affected by interaction between COO groups of alginate and Ca 2+ ions. The results of mechanical property demonstrated that CA/PEO fibers showed highest stress of 3.83 ± 0.25 MPa and helpful for improving the stress of bi-layer fibrous membrane. The obtained fibrous membrane had excellent antibacterial property with diameters of bacteriostatic zone against E. coli and S. aureus of 20.5 and 21.5 mm, respectively. On this basis, the shelf life of strawberry was improved up to 6th day by inhibit the growth of microorganisms, which indicated that the obtained fibrous membrane showed great potential for food packaging.
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高影响因子
ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Wenhao Fan,Shaoping Chen,Bo Zeng,Qiang Zhang,Qingsen Meng,Wenxian Wang,Zuhair A. Munir
Solid solutions of Mg2Si0.6Sn0.4–xBix with 0 ≤ x ≤ 0.03 were prepared by a one-step synthesis and consolidation method, using MgH2 as a starting material. The thermoelectric properties of these samples were evaluated over the temperature range 300–775 K. Figure of merit, zT, values were determined over this range for all compositions and found to increase with temperature reaching a value of 1.36 at 775 K for samples with x = 0.02. Examination of the components of the total thermal conductivity showed that the bipolar thermal conductivity is suppressed by an increase in the band gap, resulting from solid solution formation, and by low minority carrier mobility. The suppression of the bipolar thermal conductivity is believed to be the consequence of charged grain boundaries.
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 7
·e7542
·
IF 3.7
Zhiwei Liu,Liying Wang,Shanghai Dong,Lu Li,Jingjing Wang,Zhenzhu Cao,Yongfeng Zhang,Lin Cheng,Jucai Yang
Three distinct morphologies of Bi-MOFs were innovatively employed as carriers, facilitating the formation of heterojunctions with BiPO 4 . Among these, the optimal photocatalytic performance was demonstrated by the type II heterojunction BiPO 4 /CAU-17. Bi 3+ competitively coordinated to crucially aid CAU-17's transformation into a heterojunction, enhancing interfacial contact in BiPO4/CAU-17. These photocatalysts effectively degraded dyes (RhB, MO, MB) and tetracycline (TC) under light exposure. RhB degradation was 3.33 times faster with BiPO 4 /CAU-17 than BiPO 4 , 1.45 times faster than FCAU-17, 1.36 times faster than FRCAU-17, and 1.32 times faster than CAU-17. Analyzing carrier density, Fermi level, and band structure through VB-XPS, UV–VIS, and Mott–Schottky provided insights into enhanced separation of photoexcited electron–hole pairs. This study presents a novel approach to tackle the aggregation challenge of the wide-bandgap material BiPO 4 by using suitable MOFs as carriers. It offers valuable perspectives for the design and application of photocatalysts in environmental remediation.
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Journal of Materials Chemistry B
·
2025
·Vol. 13
·期 7
·2533-2548
·
IF 5.7
Mingbo Wu,Dong Li,Yao Liu,Xiaomiao Ruan,Jingwen Yang,Zegang Li,Siyi Chen,Xin Yang,Wenwu Ling
Piezocatalytic therapy is an emerging therapeutic strategy for eradicating drug-resistant bacteria, but suffers from insufficient piezoelectricity and catalytic active site availability. Herein, Bi-vacancies (BiV) and corona polarization were introduced to BiOBr nanosheets to create a BiOBr-BiVP nanoplatform for piezocatalytic antibacterial therapy. This meticulously tailored strategy strengthens the built-in electric field of nanosheets, enhancing piezoelectric potential and charge density and boosting charge separation and migration efficiency. Meanwhile, BiV adeptly adjust the band structure and increase reaction sites. Ultrasonication of nanosheets continuously enables the generation of reactive oxygen species (ROS) and CO, facilitating almost 100% broad-spectrum antibacterial efficacy. BiOBr-BiVP nanosheets demonstrate full bacterial eradication and accelerate wound healing through simultaneous regulation of inflammatory factors, facilitation of collagen deposition, and promotion of angiogenesis. Overall, this ultrasonic-triggered piezocatalytic nanoplatform combines BiV and the corona polarization strategy, providing a robust strategy for amplifying piezocatalytic mediated ROS/CO generation for drug-resistant bacterial eradication.
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高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Jie Ni,Jie Wei,Yeqi Yu,Ming-Hui Fan,Wanting Liu,Kwun Nam Hui,Yan Yan,Yan Liu,Yanqiang Huang,Jie Zeng
Hydroxylamine (NH2OH) is an important nitrogenous feedstock in the production of numerous valuable chemicals. The selective electroreduction of nitrate (NO3–) into NH2OH paves a promising avenue for the synthesis of NH2OH. Bi-based catalysts are regarded as the most promising candidates owing to the weak adsorption for NH2OH, preventing the further reduction of NH2OH. It is worth noting that Bi-based catalysts exhibited a dramatic activity gap in the acid and neutral/alkaline electrolytes toward the synthesis of NH2OH. Unfortunately, the mechanistic origin of pH-dependent NH2OH production has rarely been investigated, lacking an insightful interpretation on the atomic and molecular scale. Herein, taking Bi nanosheets (NSs) as a model catalyst, we investigated the underlying origin of the pH-dependent selectivity in NO3– electroreduction toward NH2OH production. The Faradaic efficiency (FE) for NH2OH of Bi NSs dramatically decreased from 86.6 to 12.0%, with the pH value ranging from 0 to 3. Combining the in situ Fourier transform infrared spectroscopy and theoretical calculations, we revealed that the dominant 4-coordinated hydrogen-bonded water in acid media favored the involvement of *H in the hydrogenation of *NO to *NHO, thereby facilitating the synthesis of NH2OH. Moreover, 10 kinds of amino acids were successfully synthesized by Bi NSs, demonstrating the wide universality of Bi nanosheets for the synthesis of amino acids.
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高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Jian Dong,Yi Wang,Liangliang Dong,Tatsuo Kaneko,Weifu Dong,Dongjian Shi,Mingqing Chen
To address the membrane challenges such as the trade-off effect between water permeance and separation selectivity, development of a desirable nanofiltration membrane structure is crucial. And, it is important to design a positively charged surface to enhance charge repulsion force between membrane surface and ions due to lithium (Li) extraction problem as the close hydration diameter of magnesium (Mg) and lithium ions. Herein, a strategy that involves regulating membrane structure to create a loose and dense double-layer structure via bi-directional interfacial polymerization has been proposed to form selectivity-enhanced nanofiltration membranes for Li + /Mg 2+ separation. The incorporation of dopamine (DA) and trimesoyl chloride (TMC) in first loose layer could improve the membrane stability, while the amine groups from polyethyleneimine (PEI) or polyvinylamine (PVAm) in the second dense layer surface, provided by rich amine polymers, could improve the rejection of divalent magnesium ion. The as-fabricated membrane DA-TMC-PEI shows enhanced permeance (around 15.4 L m −2 h −1 bar −1 ) and the membrane DA-TMC-PVAm demonstrates outstanding ion selectivity with Li + /Mg 2+ separation factor of 30. Moreover, the DA-TMC-PEI and DA-TMC-PVAm membranes could efficiently purify the ratio of Mg 2+ /Li + solution from 50 to 0.43. We believe the strategy could provide a promising potential in lithium extraction.
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