APPLIED SURFACE SCIENCE
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2025
·
IF 6.9
Ruichun Nan,Xinxin Zhang,Yuheng Zhao,Hongda Huang,Yapeng Niu,Ying Yan,Litao Zhang,Bingkun Liu,Jingtao Zhang,Xianzhong Yin
Herein, Pd-doped CeO 2 was synthesized by facile hydrothermal methods, X-ray diffraction (XRD) analysis and transmission electron microscope (TEM) suggests that Pd is successfully incorporated into the CeO 2 lattice. X-ray photoelectron spectroscopy (XPS), UV–Vis and PL demonstrated that Pd-doped CeO 2 improve the light absorption and enhance the electron-hole separation of CeO 2 . The prepared Pd-CeO 2 exhibits outstanding bactericidal performance. Specifically, 1 % Pd-CeO 2 can completely inactivate Ralstonia solanacearum with an initial concentration of 2 × 10 7 CFU/mL within 60 min, while also demonstrating effective killing against Escherichia coli and various pathogenic fungi. EPR demonstrated that Pd doping into CeO 2 could increase the number of vacancies, electron spin resonance (ESR) tests demonstrated that e - play a major role in the photocatalytic process, disruption of the cellular structure of E. coli during photocatalytic treatment as evidenced by scanning electron microscopy (SEM) tests. Promising reference for the practical application of precious metal photo catalysts in disinfection.
研究领域:
材料科学
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微生物学
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环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Yingfeng Wang,Kaizhun Li,Wenjing Xue,Huang Hu,Ming Huang,Maoli Yin
Environmental contamination can cause serious problems in water cycling systems. In this study, mesoporous composite-supported N-halamines (MCSNs) were synthesized and characterized, where the surface area retention rate of the MCSNs was over 70 % higher than MCM-41. The reaction between organic N-halamines and formaldehyde was examined in aqueous phase. The monomeric N-halamines (MCDMH) rapidly reacted with formaldehyde (10 ppm, 10 mL), and finished completely within 10 min. The MCSNs only reacted with formaldehyde in the high molar ratio (Cl + to formaldehyde, 40:1) and alkaline conditions (pH higher than 10), and approximately 60 % of formaldehyde can be degraded within 10 min. The reaction kinetics were studied and the kinetic parameters were investigated. The MCSNs were highly effective against S. aureus (7.94 logs) and E. coli O157:H7 (8.0 logs) with 1 min of contact time, demonstrating impressive antibacterial properties in aqueous conditions. As a type of antibacterial material, MCSNs introduce a new direction for the application of N-halamine-based materials in formaldehyde decontamination , indicating their potential to be utilized as novel water treatment materials.
研究领域:
环境科学
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材料科学
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微生物学
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DOI
高影响因子
Desalination and Water Treatment
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2024
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IF 1
Zheng Zhong,Fengjiao Zhang,Wei Chen,Xiaguo Wei,Yiwen Zhang,Yanbo Lu,Hongbin Luo,Liangqian Fan
ABSTRACT A dual-function chitosan-based flocculant named nano-chitosan-graft-poly(acrylamide and acryloyloxyethyltrimethyl ammonium chloride (NCS-g-P(AM-DAC)) with flocculation and sterilization properties was successfully synthesized by using nano-chitosan (NCS), acrylamide, and acryloyloxyethyltrimethyl ammonium chloride (DAC) under ultraviolet irradiation with 2,2’-Azobis(2- methylpropionamidine) dihydrochloride as the photo-initiator. NCS was obtained via ion cross-linking between chitosan and sodium tripolyphosphate. The structure and physicochemical properties of the product were characterized by various methods. The influence of different factors on the intrinsic viscosity of synthetic copolymer was investigated to optimize the synthetic condition. The flocculation performance of NCS-g-P(AM-DAC) was evaluated. Results showed that the superior flocculation efficiency was acquired under pH = 6 and flocculant dosage of 5 mg L –1 , in which turbidity removal efficiency was above 85%. Considering that the quaternary ammonium salt was grafted and the nanoparticle generated, NCS-g-P(AM-DAC) was also applied to flocculate Escherichia coli (E. coli) suspension to evaluate the sterilization performance. At suitable dosage and pH conditions, the flocculant effectively removed turbidity and bacterial cells. 3D fluorescence spectroscopy analysis of E. coli suspension after the flocculation was conducted to investigate the sterilization mechanism. The results showed that NCS-g-P(AM-DAC) could destroy cell membranes, indicating its bactericidal, not simply antibacterial, effect during flocculation.
研究领域:
环境科学
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材料科学
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微生物学
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DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
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2023
·Vol. 48
·期 10
·e202300149
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IF 1.8
Chao Shi,Liang Hu,Xinhang Liu,Lang Chen
This work is aimed to develop a stable Mg-based thermite with high iodine concentration and preliminarily set a method to test inactivation factor (IF) values of biocidal materials with proximity to the combat situation. First, Mg−I 2 composites were mechanochemically prepared and up to 10 wt% of iodine could be retained until the material heated to 265 °C. Then biocidal thermites were mechanochemically prepared using Mg−I 2 as a fuel and Ca(IO 3 ) 2 as an oxidizer. For Mg−I 2 −Ca(IO 3 ) 2 thermites, apparent aging was observed in the material with a stoichiometric fuel-to-oxidizer ratio. In heated filament ignition tests, thermites had ignition temperatures of ~760 °C and ~820 °C at heating rates of 1800 K/s and 13000 K/s, respectively, and were slightly lower than that of pure Mg. Particle combustion test showed that the thermite with more fuel fraction burned faster. A setup based on the constant volume explosion experiment was established to test the inactivation effect of biocidal materials. Results showed that pure Mg had the best inactivation effect, and IF value doesn't have a clear correlation with max pressure achieved by explosions of biocidal materials. For results within the same max pressure range, IF value is proportional to the iodine concentration within the materials. Interestingly, for Mg, IF value was exponentially changed with max pressurization rate, this leads to the unexpected high IF value of Mg. This study shows excessive iodine or oxidizer could deactivate the biocidal material, and the heat release rate may play a crucial role in biocidal performance.
研究领域:
材料科学
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生物学
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医学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2024
·Vol. 141
·期 30
·e55699
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IF 2.7
Xuemei Bai,Jingmin Luan,Tingting Song,Haifeng Sun,Baolin Yan,Yuhua Dai,Jianxiang Yu
Graphitic carbon nitride (g-C 3 N 4 ) has received much attention as a metal-free photocatalyst for dye degradation and sterilization. However, the low photocatalytic bactericidal activity and the difficulty in recycling have limited its applications. Here, oxidatively modified g-C 3 N 4 grafted with polyethyleneimine (PEI) nanofiber membranes (PVA/PEI-OCN) was reported to enhance the photocatalytic activity. The modification by PEI grafting could reduce the recombination rate of photogenerated carriers and lead to more electrons for the photocatalytic reaction. In addition, electron spin resonance (ESR) results showed that the generation of reactive oxygen species (˙OH, ˙O 2 − and 1 O 2 ) were significantly enhanced in photocatalysis, leading to the significant enhancement of photocatalytic bactericidal activity and dye degradation. Furthermore, the PVA/PEI-OCN nanofiber membranes prepared by electrospinning had smooth surfaces and uniform fiber formation, with an average diameter of 380 ± 60 nm. The tensile strength was about 73.5% higher than that of PVA nanofiber membranes. The inhibition diameter of PVA/PEI-OCN-4 against Escherichisa coli ( E. coil ) could reach 20 ± 0.2 mm, and the maximum degradation efficiency of methylene blue solution (10 mg/L) could reach 92.8% within 120 min. This work provided an effective paradigm for the rational design of metal-free photocatalytic materials for elimination of bacterial and dye contamination.
研究领域:
材料科学
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环境科学
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生物学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Rui Guo,Aiguo Yan,Juanjuan Xu,Botao Xu,Tingting Li,Xuanwen Liu,Tingfeng Yi,Shaohua Luo
BiVO 4 /CdS composites with different morphologies and mass ratios were successfully prepared via a facile deposition-precipitation method by adding different dispersants. Compared with spherical BiVO 4 (BS), sheet-like BiVO 4 nanoarrays (BA) showed higher (020) exposed areas, as confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). X-ray photoelectron spectroscopy (XPS) revealed further details on the microstructure of the composites namely, CdS was deposited on the surface of BiVO 4 forming an S-(111) interface layer. The photocatalytic properties of the samples were tested by studying the degradation of Rhodamine B (RhB) and the sterilization of Escherichia coli ( E. coli ) under visible-light irradiation. The BAC-60 sample showed the best photocatalytic performance among all the catalysts owing to its: (i) improved high separation efficiency of the photo-induced charge carriers and (ii) high exposure activity of the (020) plane. Electrochemical tests with non-equilibrium carrier injection and free radical trapping experiments are introduced to analyze the mechanism, such as the effects of different crystal planes on the photocatalytic reaction and the flow direction of carriers at the CdS–BiVO 4 interface.
研究领域:
材料科学
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环境科学
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微生物学
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DOI
高影响因子
ACS Applied Bio Materials
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2020
·
IF 0
Mei Hong,Ziyue Miao,Xiaoling Xu,Qiang Zhang
Poly(ionic liquid)s (PILs) such as polymeric quaternary ammonium compounds (PQACs) are among the most widely used disinfectant agents due to their broad-spectrum antimicrobial activity. However, the high cytotoxicity and difficult reclamation of PQACs remain as challenges for practical water treatment. Herein, we present the synthesis of sugar-incorporated PQACs, which could efficiently decrease the cytotoxicity toward mammalian cells (mouse fibroblast cells, L929). On the basis of the mussel-inspired surface chemistry, the functional glycopolymers could then be immobilized onto the surface of magnetic iron oxide nanoparticles, which are successfully used for the trapping and killing of bacteria. The sugar-containing PILs have combined the lectin-recognition behavior of glycopolymers and the antibacterial activity of PQACs. Antibacterial experiments demonstrate the high-performance of cationic hybrid nanocomposites in killing pathogenic Escherichia coli (E. coli), up to 100% sterilization efficiency. The nanocomposites could be facilely recovered under external magnetic field, and a high sterilization efficiency of 94% could be retained during a five-circulation use. Such hybrid nanocomposites are highly efficient, expediently recyclable, and low-cytotoxicity disinfectant agents and may have potential application for water disinfection treatment.
研究领域:
材料科学
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微生物学
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产品关联
DOI
PubMed
ELECTROCHEMISTRY
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2025
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IF 1.7
Hongyu CHEN,Ru TIAN,Jianke LI,Beibei HAN,Guoku LIU,Shiyu YIN,Guiying XU,Kun WANG,Fukuan WANG,Baigang AN,Dongying JU,Weimin ZHOU
TiO2 as a semiconductor photocatalyst has been extensively utilized in the purifications of water and air. However, the wide band gap of TiO2 necessitates its activation by ultraviolet irradiation, when it is utilized as a photocatalyst. To enhance the photocatalyst performance of TiO2, constructing the heterojunction containing TiO2 is considered as a highly effective method. To unfold the actual application, iron metal oxides are firstly utilized to construct the heterojunction of TiO2/α-Fe2O3, and the synthesized TiO2/α-Fe2O3 heterojunction was successfully coated on the surface of coal tar pitch based spherical activated carbons (CTP-SACs). The structures of TiO2/α-Fe2O3/CTP-SACs are verified by the X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The results of UV-vis absorption spectroscopy supports that TiO2/α-Fe2O3/CTP-SACs are promising candidates for the natural light photoncatalysis. It is believed that the exceptional conductivity of CTP-SACs enhances the activity of the photocatalyst, resulting in the TiO2/α-Fe2O3/CTP-SACs exhibiting remarkable sterilization effects under natural light. For instance, the TiO2/α-Fe2O3-60-CTP-SAC shows an excellent sterilization rate (89 %) for the fish culture water under the irradiation of natural light for 20 min. Associating with the excellent liquidity of CTP-SACs, it is considerable that TiO2/α-Fe2O3/CTP-SACs possess the captivating application prospects in a field of the feeding water treatment.
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
PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2017
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IF 4.164
Yi Xie,Shengqiu Chen,Yihui Qian,Weifeng Zhao,Changsheng Zhao
In this paper, a photo-responsive bactericidal and bacteria-resistant membrane was successfully prepared via the integration of atom transfer radical polymerization (ATRP) and click chemistry. Azide -functionalized polycationic poly ( N , N -dimethyl-N-(2-(methacryloyloxy)ethyl)-N-((2-nitrobenzyl)oxy)-2-oxoethanaminium bromide) (PDMAEMA-NBE) was synthesized by ATRP. Then, the PDMAEMA-NBE was clicked on alkynyl -functionalized polyethersulfone (PES) membrane surface, and proved by X-ray photoelectron spectrometer (XPS). Upon UV irradiation, the polycationic surface would switch to polyzwitterionic one. Before and after the irradiation, the zeta potentials of the surface altered from + 14.7 to − 3.8 mV, and the water contact angle decreased from 64.0° to 52.7°. The polycationic surface exhibited excellent bactericidal property and the dead bacteria could detach from the polyzwitterionic surface induced by the subsequent UV irradiation. It demonstrated that the designing of photo-responsive membrane surface could be a new strategy for antibacterial adhesion.
研究领域:
材料科学
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微生物学
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生物医学工程
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DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 16
·期 1
·387
·
IF 3.748
Kezhu Xu,Qunling Fang,Jing Wang,Ailing Hui,Shouhu Xuan
Due to the abuse of antibiotics, the sensitivity of patients to antibiotics is gradually reduced. This work develops a Fe3O4@SiO2@Au/PDA nanochain which shows an interesting magnetic-field-induced improvement of its photothermal antibacterial property. First, SiO2was wrapped on Fe3O4nanospheres assembled in a chain to form a Fe3O4@SiO2nanocomposite with a chain-like nanostructure. Then, the magnetic Fe3O4@SiO2@Au/PDA nanochains were prepared using in situ redox-oxidization polymerization. Under the irradiation of an 808 nm NIR laser, the temperature rise of the Fe3O4@SiO2@Au/PDA nanochain dispersion was obvious, indicating that they possessed a good photothermal effect. Originating from the Fe3O4, the Fe3O4@SiO2@Au/PDA nanochain showed a typical soft magnetic behavior. Both the NIR and magnetic field affected the antimicrobial performance of the Fe3O4@SiO2@Au/PDA nanochains.Escherichia coliandStaphylococcus aureuswere used as models to verify the antibacterial properties. The experimental results showed that the Fe3O4@SiO2@Au/PDA nanochains exhibited good antibacterial properties under photothermal conditions. After applying a magnetic field, the bactericidal effect was further significantly enhanced. The above results show that the material has a broad application prospect in inhibiting the growth of bacteria.
研究领域:
材料科学
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生物医学工程
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微生物学
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 24
·3484
·
IF 4.7
Yiwen Miao,Chenghao Zhang,Ya Sun,Chunlei Wang,Juntao Yan,Sunhua Deng,Ruan Chi
A series of flexible polyacrylonitrile/TiO2(PAN/P25) multi-porous nanotubular membranes were successfully constructed by facile electrospinning combined with an ethylene glycol solvothermal induce strategy. The effects of P25 dosage and solvothermal time on the morphology of samples were systematically investigated, which were characterized in terms of surface morphology, microstructure, specific surface area, thermal analysis, wettability, photoelectrochemical and fluorescence spectra. Rhodamine B (RhB) andEscherichia coli(E. coli) were employed as simulated pollutants to evaluate photocatalytic degradation and antibacterial properties of the PAN/P25-3 multi-porous nanotubular membrane. The PAN/P25-3 membrane exhibited the highest photocatalytic degradation efficiency, with 96.1% degradation of RhB within 120 min under a xenon lamp light source and a photocatalytic inactivation rate of 95.8% forE. coliunder 365 nm monochromatic light irradiation. The photocatalytic degradation mechanism of the PAN/P25-3 multi-porous nanotubular membrane for RhB was deduced from the results of 3D-EEM fluorescence and scavenger experiments of reactive species. Additionally, the cyclic photodegradation experiments demonstrated that the PAN/P25-3 membrane maintained excellent stability and photocatalytic performance after multiple degradation cycles, confirming its potential for sustainable wastewater treatment applications.
研究领域:
材料科学
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环境科学
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光催化技术
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产品关联
DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 1
·1-16
·
IF 21.8
Huang Shan,Wang Mengmeng,Ni Xinjie,Liu Xinqi,Fang Yi,Xiao Qi,Zhang Yue
Catalysts that effectively degrade organic pollutants and exhibit bactericidal properties are highly up-and-compromising for water treatment applications. To overcome the inherent limitation that the rapid recombination of the photogenerated carriers and to extend the practical utility of Bi 2 WO 6 , a flower-like structure of 7 wt.% Er 3+ -doped Bi 2 WO 6 (Er 7% -Bi 2 WO 6 ) capable of oxygen vacancy and crystal defect was synthesized using a straightforward hydrothermal method. Under visible light irradiation (λ > 420 nm), the Er 7% -Bi 2 WO 6 achieved a Rhodamine B (RhB) degradation efficiency of 92% within 80 min, significantly surpassing that of pristine Bi 2 WO 6 . The kinetic rate constant of Er 7% -Bi 2 WO 6 was determined to be 0.0288 min −1 , which is 5.9 times higher than the 0.0049 min −1 observed for Bi 2 WO 6 . Additionally, the bactericidal rate against Escherichia coli after 120 min of visible light exposure was 93.9%, nearly twice that of Bi 2 WO 6 at 49.8%. Density functional theory calculations and experimental results confirmed that doping with Er 3+ introduced lower band gap and more photogenerated carriers, enhanced visible light absorption, and ultimately improved the photocatalytic performance. Electron paramagnetic resonance and radical trapping experiments identified h⁺ and ·O 2 ⁻ as the primary active species generated during the photocatalytic process of Er 7% -Bi 2 WO 6 . The RhB removal rate remained above 90% after five degradation cycles, and the treatment efficacy on actual water samples was 76%. This study highlights the potential of Er-doped Bi 2 WO 6 to enhance both photocatalytic degradation of organic pollutants and bactericidal performance, thereby expanding the application scope of Bi 2 WO 6 in water treatment. Graphical
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）