ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Renyuan Deng,Xiangmei Liu,Jin Huang,Yi Wang,Dafu Chen,Chaofeng Wang,Khin Wee Lai,Congyang Mao,Guangrong Qian,Yufeng Zheng,Shuilin Wu
Contact infection is accelerating the spread of pathogenic bacteria, threatening the health of people all over the world. Herein, photoresponsive TiO 2 /N-doped ZnO (TiO 2 /N-ZnO) nanofilms are synthesized using atomic layer deposition and the sol–gel method to rapidly kill bacteria on electronic touch screens by strengthened photocatalytic sterilization. The enhancement of the photocatalytic performance of TiO 2 /ZnO is significantly attributed to the oxygen vacancy and crystal defect induced by nitrogen element doping, leading to the production of an increased quantity of reactive oxygen species from TiO 2 /N-ZnO. Further, when bacteria engage with the nanofilm, there is an occurrence of electron transfer between the TiO 2 /N-ZnO and the bacterial film, thereby consequently disturbing the electron equilibrium on the bacterial film. Upon exposure to simulated sunlight for a duration of 3 min (for Staphylococcus aureus ; S. aureus ) or 10 min (for Escherichia coli ; E. coli ), TiO 2 /N-ZnO demonstrates superior antibacterial effects (>95%) on both bacterial strains. With the illumination time extended to 20 min, the antibacterial efficacy of TiO 2 /N-ZnO against S. aureus and E. coli reaches up to 100%. Concurrently, the TiO 2 /N-ZnO nanofilms demonstrate commendable light transmittance (>85%) and biocompatibility. As such, this study may offer a potential methodology for antimicrobial applications in electronic touch screens.
研究领域:
材料科学
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微生物学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhenda Liang,Haiqing Wang,Kena Zhang,Ge Ma,Lishan Zhu,Li Zhou,Bing Yan
Low-cost MnO 2 has been vigorously investigated in the field of catalysis. However, high amount of MnO 2 usually needs to be used in the disinfection process owing to their low photocatalytic activity. In this work, modification of MnO 2 with zeolitic imidazole framework-8 (ZIF-8) for improving the photocatalytic bactericidal performance was explored for the first time. Specifically, MnO 2 /ZIF-8 exhibited complete inactivation of multi-drug resistant Escherichia coli ( E. coli) at a low concentration (3.24 μg/mL) with simulated solar irradiation. The 1 O 2 rather than O 2 − or OH was identified as the major reactive species for the bacterial inactivation. Mechanistic studies indicated that the superior bactericidal property of MnO 2 /ZIF-8 than the pristine material could be ascribed to the increased surface oxygen vacancies (OVs) amount and an inhibited electron and hole recombination. This study provides a novel type of photocatalyst for antibacterial application and may shed light on designing MnO 2 based low-cost nanocomposites with photocatalytic bactericidal capability for the practical water disinfection treatment.
研究领域:
环境科学
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材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiaqian Zhang,Jinjuan Xue,Zhenbo Wu,Mingxin Wang,Yiting Lv,Zhaoxia Chen,Shuaishuai Ma
In this work, we fabricated a multifunctional membrane by in-situ growth of tetrakis (4-carboxyphenyl) porphyrin-doped UiO-66-NH 2 on stainless steel mesh (SSM), denoted as TCPP/UiO@SSM, for gravity-driven oil–water/seawater mixtures separation and visible-light-driven bacterial inactivation. The as-prepared membrane exhibited high permeation flux (up to 46312 ± 1583 L m −2 h −1 ) as well as separation efficiency (above 98%) towards various oil–water/seawater mixtures separation, which resulted from the rough hierarchical structure and the inherent super-wettability. In particular, the membrane can effectively deal with viscous oil fouling to achieve a desired flux recovery ratio (FRR) after separating crude oil from water, attributing to the self-cleaning property originated from the photo-active TCPP/UiO. Furthermore, the as-fabricated TCPP/UiO@SSM has the ability to efficiently inactivate typical Gram bacteria (6 log units) in water under visible light . Both the oil–water separation and photocatalytic sterilization performances of TCPP/UiO@SSM are superior to UiO@SSM. The doping of photosensitive TCPP in UiO-66-NH 2 not only improved the hydrophilicity, but also enhanced the photocatalytic activity by creating a Z-scheme heterojunction to promote the separation of charge carriers and amplify the photothermal effect. This work provides a new platform for water disinfection and the treatment of oily wastewater containing viscous oil phase based on UiO metal–organic framework.
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
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Ying Zhang,Xuhuan Zhao,Shiqi Fu,Xiulong Lv,Qian He,Yingxin Li,Fangying Ji,Xuan Xu
An Ag/TiO 2 coating was deposited onto glazed ceramic tiles by a sol-gel and spraying method at high temperatures. The coating was characterized by X-ray diffraction, scanning electron microscopy, and atomic force microscopy . The results showed that silver was present in rutile-TiO 2 , and the temperature did not change the phase composition of the samples. The Ag/TiO 2 coating had a higher roughness than the TiO 2 coating. The tape test (D 3359–08) showed that the coatings prepared at 950 °C and 1000 °C had good adhesion to the ceramic tile substrate. The antibacterial activity of the coating was tested by photocatalytic sterilization experiments. The results showed that the Ag/TiO 2 coating had a higher antibacterial activity than the TiO 2 coating, and the sterilization efficiency of Escherichia coli, Staphylococcus aureus, Shigella , and Salmonella exceeded 99.655% under 2 h of visible light irradiation. This research provides a method to create Ag/TiO 2 coatings with good thermal resistance, adhesion, and antibacterial activity. This improves the low photocatalytic activity caused by the anatase-to-rutile transformation of TiO 2 at high temperatures and the poor adhesion at low temperatures.
研究领域:
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Yan Li,Mengna Ding,Guoxiang Yang,Lei Wang,Liulin Luo,Yingchun Miao,Yuning Huo
Acinetobacter baumannii ( A. baumannii ) was widely existed in medical wastewater and easily induced infections to threaten the human healthy. We herein reported Ag/CoO-N photocatalyst composites for effective inactivation of A. baumannii . Ag/CoO-N composites were prepared by N-doping to CoO crystal in supercritical fluid followed with photo-reduction of Ag under visible-light irradiation. N-species was incorporated in the crystal structure of CoO, on which uniform Ag nanoparticles were stably deposited. Thus, the satisfactory photocatalytic sterilization of A. baumannii irradiated by visible-light irradiation was attributed to the high capability of light trapping and the efficient separation of photo-charges. Due to photo-induced electrons as the main active species, Ag nanoparticles and CoO-N synergistically realized mineralization of cell membrane, which lead K + ions leak from cell to crack structure of bacteria, the decrease of genetic materials, and the cripple of the self-repair function in bacteria, resulting in the final cell death.
研究领域:
微生物学
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材料科学
·
医学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yangyang Sun,Shaosheng Rao,Qinqin Liu,Chuang Zhi,Zhongxi Lu,Rong Ma,Zhongti Sun,Juan Yang
Although heterogeneous photocatalytic sterilization can avoid secondary pollution and achieve broad spectrum antibacterial effects, its low disinfection efficiency seriously hinders its development. Exploring and achieving precise electron-transfer channels in the interface of heterogeneous systems are an effective method to enhance photocatalytic sterilization. Herein, we designed a chemical Zn–N bonded nitrogen-doped porous carbon-loaded zinc oxide (ZnO/NC) Schottky heterojunction photocatalyst through oxidizing and carbonizing ZIF-8 in-situ at suitable temperatures. The Zn–N accurately facilitated the photogenerated electrons transfer from the conduction band (CB) site of ZnO to the NC surface as active site. Furthermore, the NC as carrier enhanced the light-absorption capacity (746 nm) of Schottky heterojunction and functioned as active site to promote the generation of reactive oxygen species (ROS). In addition, the slow-release effect of zinc ions (Zn 2+ ) from ZnO contributed to the accelerated death of bacteria. As a result, under simulated sunlight conditions, the ZnO/NC-400(1 h) Schottky heterojunction demonstrated an impressive antibacterial efficiency of 99.33 % against Escherichia coli , consistently exceeding 95 % in repeated experiments. This work presents a controllable and encouraging approach for constructing heterojunction with effective antibacterial properties.
研究领域:
材料科学
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环境科学
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微生物学
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2020
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IF 3.862
Bingyu Wang,Cenyao Shang,Ziyue Miao,Shutong Guo,Qiang Zhang
The superior photocatalysis of titanium dioxide (TiO 2 ) had received much attention, but the effect of its separation and agglomeration on the water disinfection performance should not be ignored. Herein, lactose-containing glycopolymers grafted onto magnetic TiO 2 nanomaterials were prepared through copper (0) mediated controlled radical polymerization and “grafting to” strategy to improve their separation and dispersibility properties. The physicochemical properties of the Fe 3 O 4 @TiO 2 /glycopolymers were systematically characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, dynamic light scattering, transition electron microscopy, and vibrating sample magnetometer. The result of the survival bacterial ratio under ultraviolet exhibited the well photocatalytic antibacterial activity of Fe 3 O 4 @TiO 2 /glycopolymers towards E. coli , which retained the photocatalytic sterilization performance of TiO 2 . Among them, Fe 3 O 4 @TiO 2 @poly(LacA) showed an excellent ability to identify and trap E. coli because of the carbohydrate-protein recognition effect. The endocytosis of E. coli on Fe 3 O 4 @TiO 2 @poly(LacA) was further confirmed by the image of transition electron microscopy. Considering the magnetic characteristics of Fe 3 O 4 @TiO 2 /glycopolymers, it is speculated that these antibacterial agents can be easily recovered by the external magnetic field, and thus be a promising candidate for photocatalysis water 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
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 6
·3140-3150
·
IF 3.925
Xingrui Qi,Zhidong Zhao,Nian Li,Zijian He,Yufang Chen,Tao Jin
At present, water resources contaminated by pathogenic microorganisms have an increasingly serious impact on human health. Photocatalytic sterilization using solar energy is an inexpensive and effective method. However, how to effectively utilize solar energy and improve the photocatalytic performance of catalysts is the main problem at present. In this work, urchin-like WO3−x and Cu-doped WO3−x were synthesized by a simple method. The synthesized photocatalysts were characterized in detail, and the sterilization performance of the catalysts was investigated under simulated sunlight. The sterilization rates of WO3−x against Escherichia coli and Staphylococcus aureus were 65.74% and 94.73%, respectively, while the sterilization rates of WO3−x doped with Cu against these two bacteria were 99.95% and 99.24%, respectively. Cu–WO3−x shows excellent photocatalytic bactericidal performance, which is attributed to the enhanced oxygen vacancies of WO3−x and the separation of photogenerated electron–hole pairs by the doping of Cu. This work is expected to provide an effective way to develop solar photocatalytic sterilization.
研究领域:
环境科学
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材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lifang Sun,Wen Li,Chengcheng Ma,Gaojian Lv,Huimeng Feng,Yanan Pu,Tianxiang Sun,Shougang Chen
The Z-scheme heterojunction has demonstrated significant potential for promoting photogenerated carrier separation. However, the rational design of all-solid Z-scheme heterojunctions catalysts and the controversies about carrier transfer path of direct Z-scheme heterojunctions catalysts face various challenges. Herein, a novel heterojunction, Cu 2 O@V-CN (octa), was fabricated using V-CN (carbon nitride with nitrogen-rich vacancies) in-situ electrostatic self-wrapping Cu 2 O octahedra. Density functional theory (DFT) calculations revealed that the separation of carriers across the Cu 2 O@V-CN (octa) heterointerface was directly mapped to the Z-scheme mechanism compared to Cu 2 O/V-CN (sphere). This is because the Cu 2 O octahedra expose more highly active (1 1 1) lattice planes with more terminal Cu atoms and V-CN with abundant nitrogen vacancies to form delocalized electronic structures like electronic reservoirs. This facilitates the wrapping of Cu 2 O octahedra by V-CN and protects their stability via tighter interfacial contact, thus enhancing the tunneling of carriers for rapid photocatalytic sterilization. These findings provide novel approaches for designing high-efficiency Cu 2 O-based photocatalytic antifoulants for practical applications.
研究领域:
材料科学
·
光催化技术
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiafeng Xi,Xiaojuan Liu,Liang Zhang,Zuwang Zhang,Junchen Zhuo,Ting Du,Yajie Zhang,Jinyou Duan,Hongliang Dong,Jianlong Wang
Within the illustrious and renowned MXene family, Niobium carbide (Nb 2 C) has astounded researchers by exhibiting an extraordinary level of photothermal conversion efficiency and photothermal stability, all while maintaining the possibility of biodegradability. However, the absence of band gaps hindered Nb 2 C as an attractive photoresponsive material for sterilization purposes. To overcome this obstacle, we engineered a Schottky heterojunction in Nb 2 C by introducing Ru and Bi 2 S 3 based on the work function theory to generate an internal electric field (IEF) in Ru@Bi 2 S 3 /Nb 2 C, thus enhancing the photocatalytic sterilization performance by improving the charge transfer efficiency. The strategic doping of Ru also improved the carrier separation as an electron trap, apart from enhancing the light absorption efficiency by exploiting the Localized Surface Plasmon Resonance (LSPR). The results of Ultraviolet Photoelectron Spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS) divulge the stark difference in work function, which facilitates the directional transfer of carrier and subsequently augments the formation of Schottky heterojunction. This unique structure which is beneficial to the generation of reactive oxygen species (ROS). As a result, the in vitro sterilizing efficiency of the Ru@Bi 2 S 3 /Nb 2 C exceeds 99.87%, and in vivo experiments demonstrated wound healing effects in mouse wound models. These results have confirmed the significant implications of Schottky heterojunction for the use of Nb 2 C in the biomedical sector.
研究领域:
材料科学
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生物医学工程
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Luyun Cui,Xianzheng Guo,Zijun Wei,Shuwei Han,Xin Yu,Shiqing Feng,Hong Liu,Jingang Wang
The antimicrobial properties of dressings are critical for wound recovery, as they serve as the first line of defense against microbial invasion. In this study, bismuth sulfide (Bi 2 S 3 ) was synthesized and immobilized onto a piezoelectric polyvinylidene fluoride (PVDF) fiber membrane to achieve enhanced photocatalytic sterilization efficacy. Scanning electron microscopy and transmission electron microscopy analyses unambiguously verified that Bi 2 S 3 formed a nanosheet structure on the PVDF surface. The specific surface area of the PVDF/Bi 2 S 3 composite was measured to be 175.3 m 2 ·g −1 , indicating a high surface area for potential antimicrobial activity. The PVDF/Bi 2 S 3 composite demonstrated strong light absorption in both the visible and near-infrared regions, generating significant amounts of reactive oxygen species under simulated sunlight. Photocatalytic sterilization experiments revealed that PVDF/Bi 2 S 3 exhibited superior antibacterial performance against both Escherichia coli and Methicillin-Resistant Staphylococcus aureus compared to PVDF or Bi 2 S 3 powder alone. These findings demonstrate that the inherent polarization field within the PVDF matrix significantly enhances the photocatalytic efficiency of Bi 2 S 3 . Furthermore, under vibration conditions, the piezotronic effect of the PVDF membrane further improved the photocatalytic sterilization efficiency of PVDF/Bi 2 S 3 compared to static conditions. When applied as a dressing for trauma treatment in mice, the movement and limb traction of the animals activated the piezotronic effect of the PVDF fiber membrane. This dynamic interaction enhanced the photocatalytic bactericidal properties of the dressing, thus promoting wound healing and optimizing the overall efficacy of PVDF/Bi 2 S 3 in wound treatment.
研究领域:
材料科学
·
生物医学工程
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shijun Zhang,Zesheng Zhang,Can Wang,Sikandar Khan,Lei Wang,Ruiyong Zhang,Xin Zhang,Jun Zhou,Jizhou Duan
For the first time, cerium dioxide CeO 2 nanoparticles with a foamy porous structure were prepared by green synthesis using coffee extract as a reducing and stabilising agent, and the porous CeO 2 photocatalysts were used for sterilisation. X-ray photoelectron spectroscopy (XPS) analysis confirmed the binding energies of the elements C1s, O1s, and Ce3d. Scanning electron microscope (SEM) and Transmission Electron Microscope (TEM)analysis revealed a highly porous and foam-like structure of CeO 2 . Ce−O stretching bands were observed by Fourier Transform Infrared Spectrometer (FT-IR) and Raman spectroscopy. The band gap of CeO 2 was estimated to be 3.24 eV by UV–Visible spectrum. Photocatalytic bactericidal efficacy of foam-structured CeO 2 was evaluated against bacteria. It was observed that CeO 2 exhibit a significant bactericidal effect against G + and G – bacteria as compared to spherical-structured CeO 2 prepared by conventional hydrothermal synthesis. The bactericidal characteristics and features of CeO 2 photocatalyst are attributed to the fact that the as synthesized porous structured promote the use of light and induces the enhanced production of reactive oxygen species (ROS), which in turn cause lipid peroxidation, membrane damage and ultimately kill bacteria.
研究领域:
材料科学
·
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）