Journal of Inorganic and Organometallic Polymers and Materials
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2020
·Vol. 30
·期 9
·3378-3387
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IF 1.941
Ai Cuiling,Wu Xuefang,Ke Yuting,Lei Yingjie,Shao Xiangwen
The photocatalyst sorbic acid (SA)/titanium dioxide (TiO 2 ) was successfully synthesized by sol–gel method and characterized. The composite exhibited regularly spherical particles with the size of 50 nm and the specific surface area of 90.3 m 2 g −1 , furthermore, it showed mesoporous structure and significantly improved dispersion. SA was grafted on TiO 2 surface by –COOTi and TiO 2 existed as pure anatase phase in the composite. The addition of SA made the band gap of TiO 2 increased from 3.03 to 3.35 eV, which indicting that the composite exhibited a strong response to the ultraviolet light. The optimum preparation parameters of the catalyst were as follows: n(Ti):n(SA) = 1:0.05, ethanol 60 mL, glacial acetic acid 40 mL, hydrothermal temperature 180 °C, hydrothermal time 12 h. The composite could reach the 4.31 log reduction of E. coli , with the optimum catalyst dosage of 0.7 g L −1 , irradiated by UV light for 60 min. SA/TiO 2 was an environmentally friendly, non-toxic and safe sterilized nanocomposite material appropriate for future bactericidal applications, providing a new way to effectively increase the dispersion of TiO 2 particles to achieve superior photocatalytic sterilization efficiency.
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
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Boda Dong,Jiayong Gao,Hao Wang,Yulin Liu,Xiaoning Tang,Xin Gao,Jie Shang,Lincai Peng,Heng Zhang
Quantum dots (QDs), with adjustable bandgaps, high interfacial reactivity, and efficient charge transfer, are promising in photocatalytic bacteriostasis. However, challenges like fast charge recombination, instability, and aggregation limit their catalytic efficiency and broader applications. A dual-carrier system of regenerated cationic cellulose (RCC) and Ga is first proposed to achieve steady-state Cu x S QDs with quantum confinement, sulfur-rich vacancies, and p-type Schottky structure, maximizing their photocatalytic activity. The Schottky junction interface and internal electric field accelerate carrier separation, while sulfur vacancies act as hot electron traps, further suppressing electron–hole recombination. Therefore, this ternary composite system demonstrates an optimal bandgap (2.25 eV), low electrochemical impedance, extended photoluminescence decay (9.87 ns), and broad-spectrum light absorption, thereby improving carrier conversion into ROS, including 1 O 2 . These reactive species high-efficiently sterilize E. coli , S. aureus , and drag-resistant bacteria, achieving logarithmic removal values of 6–8 at a high bacterial concentration (10 8 CFU mL −1 ) under visible-light illumination. Pathogen demise primarily results from photo-excited ROS, which induce instability and even substantial damage to microbial membranes, leading to excessive oxidative stress and degradation of essential cellular components, including superoxide dismutase, catalase, and DNA. This study introduces an innovative organic/inorganic strategy for designing semiconductor QD-based disinfection photocatalysts.
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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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bangfeng Fu,Yifan Pan,Peng Zhao,Liang Zhang,Junchen Zhuo,Jianxing Feng,Bingzhi Li,Lenan Yao,Jiafeng Xi,Xi Lan,Linpin Luo,Ting Du,Xianghong Xie,Rong Wang,Wentao Zhang,Jianlong Wang
The inherent narrow band gap of bismuth oxyiodide (BiOI) consistently leads to the rapid recombination of photogenerated carriers, significantly constraining its practical utility. To combat this shortcoming, we devise a Bi/BiOI 1−x (BB) nanosheet with edge heterostructure. It is modified by the introduction of both iodine defects and in-situ bismuth deposition through high-temperature calcination and solvothermal strategy. Notably, the in-situ deposition of bismuth enhances the visible-light absorption ability of BiOI. And the incorporation of iodine defects initiates a modification in the band position of BiOI, ultimately diminishing the electron-hole recombination rate effectively. More importantly, facilitated by the major work function of bismuth, a Schottky barrier is formed at the BB heterojunction interface, which effectively promotes the separation of photogenerated charges within BB. And the photocurrent intensity of BB is 4 times higher than that of pure BiOI. These ingenious designs result in a significant boost in the generation of reactive oxygen species (ROS) through the accumulation of electrons and holes on the surfaces of both Bi and BiOI 1−x . And BB photocatalyst shows an outstanding broad-spectrum bactericidal performance. The antibacterial rates against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ) are 88.01% and 90.01%, respectively, which are increased by 80.6% and 83.8% compared with BiOI. Moreover, in vivo experiments provide compelling evidence for the BB photocatalyst’s potential in promoting wound healing. The healing rate after BB treatment has already reached more than 95% on the fifth day. This work offers valuable insights on enhancing the sterilization performance of photocatalysts based on the synergistic effects of defect engineering and non-noble metal deposition.
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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产品关联
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Ziyi Jiang,Qunfeng Yue,Changhong Guo,Huiming Lin
Here, CuBi 2 O 4 /carbon dots (CBO-CDs) were prepared to reveal their high-performance of solar photocatalytic sterilization. Firstly, CuBi 2 O 4 nanoflower assembled by nanotubes were synthesized via a hydrothermal strategy through the regulation of pH condition. The primary nanotubes shorten the distance for charge transfer, and the novel hierarchical structure also provides abundant active sites to enrich substrate. After the loading of CDs, the composites enhance light harvesting across the entire spectrum. Moreover, they possess Z-scheme mechanism endowing efficient charge separation and high redox potential. The photogenerated electrons can capture the dissolved O 2 to produce reactive oxygen species (ROS), which can induce cellular inactivation by cleaving cell membrane and degrading cytogenetic constituents. The notable solar photocatalytic ability not only inactivate E. coli (96.88 ± 1.50 %) and S. aureus (99.96 ± 1.41 %) but also can damage their biofilms (above 91.70 ± 2.54 %) efficiently. Moreover, the practical complex lake sample was also investigated to reveal great bacteriostatic (97.65 ± 1.30 %) and methylene blue degradation (99.91 ± 1.40 %) ability, simultaneously. Additionally, CBO-CDs also can disinfect mask under irradiation, contributing to the development of self-cleaning mask. Given their broad-spectrum antimicrobial, novel biocompatibility, and solar-activation, CBO-CDs possess great practical application potential for sterilization.
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
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 6
·2303-2311
·
IF 3.288
Ning Jiang,Hongchao Geng,Yan Qiao,Xingqi Zhu,Chenyi Li,Qingyun Cai
A visible-light-active CuInSe2:Zn/g-C3N4/TiO2 nanowire (NW) photoelectrode was prepared by in situ growth of g-C3N4 on the surface of TiO2 NWs, followed by drop deposition of Zn-doped CuInSe2 quantum dots (CuInSe2:Zn QDs). It has a 2.205 eV band gap and can absorb visible light. The as-prepared ternary hybrid nanocomposite CuInSe2:Zn/g-C3N4/TiO2 NWs shows high photon absorption and photocurrent generation efficiency, as well as a high bactericidal effect on Staphylococcus aureus.
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
Journal of Physical Chemistry C
·
2010
·
IF 4.224
Wenlan Wang,Qingkun Shang,Wei Zheng,Hui Yu,Xuejiao Feng,Zhidan Wang,Yabin Zhang,Guoqiang Li
A novel near-infrared antibacterial material, Er3+-Yb3+-Fe3+ tridoped TiO2 nanopowder, was synthesized and applied to kill Aeromonas hydrophia with a maximal bactericidal rate of 65% in 90 min under 980 nm laser irradiation. However, Fe3+-TiO2 or Er3+-Yb3+-TiO2 nanopowders obtained under the same conditions barely could kill Aeromonas hydrophia. The initial energy applied in the photocatalysis antibacterial process is supplied by the upconversion emission of Er3+ and Yb3+ and the codoping of Fe3+, which has intensified the light absorption intensity and enlarged the absorption range. The analyses of phase structure and the optical properties including XRD, UV−vis diffuse reflectance spectra, and upconversion photoluminescence spectra of Er3+-Yb3+-Fe3+ tridoped TiO2 nanopowder have been performed in detail to reveal the complex energy transfer and change mechanism. According to our experimental results, the mechanism has been demonstrated involving the upconversion emission, multistep excitation by means of intermediate energy level, capture and transfer electrons of Fe3+, and so on. The photocatalystic antibacterial function of Er3+-Yb3+-Fe3+-TiO2 under near-infrared instead of ultraviolet light is also reported. Because of the strong penetrability of near-infrared, this kind of material may be used in photodynamic therapy (PDT) to kill bacteria or tumors directly.
研究领域:
材料科学
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生物学
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光化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 28
·12201-12207
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IF 3.288
Yan Qiao,Xionglin Zhou,Hongchao Geng,Leilei Sun,Deshuai Zhen,Qingyun Cai
A β-NaYF4:Yb,Er,Gd nanorods@1T/2H-MoS2 nanocomposite was fabricated and used for photocatalytic sterilization under illumination from single near-infrared (NIR) light. Approximately 99.3% of Escherichia coli were killed effectively by 15 min irradiation of NIR light at a dose of 40 μg mL−1. The effective bactericidal activity is ascribed to the high upconversion luminescence efficiency of β-NaYF4:Yb,Er,Gd and the layered two-dimensional nanosheet structure of 1T/2H-MoS2. Under 980 nm light irradiation, β-NaYF4:Yb,Er,Gd emits visible light, which is absorbed by MoS2, producing strongly oxidative holes and reductive electrons. Photogenerated electron–hole pairs were able to react with H2O, O2 and OH− to produce reactive species in aqueous solution. These reactive species are strong nonselective oxidizing agents for sterilization.
研究领域:
材料科学
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纳米技术
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光催化
·
细菌学
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2023
·Vol. 11
·期 10
·3589-3602
·
IF 6.6
Bo Huang,Wei Guan,Chaofeng Wang,Shuilin Wu,Zhenduo Cui,Yufeng Zheng,Zhaoyang Li,Shengli Zhu,Hui Jiang,Paul K. Chu,Xiangmei Liu
Charge transfer and separation play a critical role in the photocatalytic efficiency of photoresponsive materials and their subsequent applications. Herein, for the first time, we constructed a homo-heterostructured S–Cu–FC/CuS modified carboxymethyl cellulose (CMC) hydrogel doped with graphene oxide (GO) (S–Cu–FC/CuS/GO@CMC) through an in situ ionic complexation reaction, which exhibited enhanced photocatalytic performance under 808 nm near-infrared (NIR) light irradiation. On the one hand, photo-excited charges can rapidly transfer across the homo-heterojunction interface with copper atoms in S–Cu–FC/CuS as both donors and acceptors. On the other hand, the interface between GO and S–Cu–FC/CuS also favors the fast transfer of photogenerated charges. Hence, with the assistance of a photothermal effect, the enhanced photocatalytic performance of S–Cu–FC/CuS/GO endowed the hydrogel with robust sterilization ability for killing 99.5% S. aureus and 100.0% E. coli under 10 min NIR light irradiation. An in vivo test disclosed that this hydrogel could also accelerate the healing of bacteria-infected wounds.
研究领域:
材料科学
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光催化
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Haimeng Huang,Jianfeng Zhang,Chunmei Tang,Anyu Li,Tianmeng Zhang,Huapeng Xue,Daofeng Zhang
Photocatalytic sterilization has been recently realized as a competitive strategy for effective water purification just using sunlight, for which the new photocatalytic materials play the key role. In this study, a novel Z-scheme heterojunction material MXene/TiO 2 /Bi 2 S 3 was proposed, where TiO 2 nanoparticles and Bi 2 S 3 microspheres were uniformly distributed on the MXene nanosheets through facile hydrothermal oxidation and ultrasonic dispersion. With this Z-scheme heterojunction MXene/TiO 2 /Bi 2 S 3 , effective and quick sterilization of both Gram-negative bacteria and positive bacteria in only 120 min was realized. Especially, the apparent reaction constant for S. aureus reached 0.01659 min −1 , substantially higher than MXene and other related materials in literature. This could be ascribed to the narrow band gap (1.04 eV), the wide range of light absorption range (420 nm), and the low impedance of the as-obtained composite, facilitating the transfer and separation of photo-generated charges, which was also validated through the first-order kinetic model and DFT simulation calculations. Thus, the reactive species produced by photocatalysis effectively disrupted the defense action of the bacteria by damaging bacterial membrane structure, and reducing enzyme activity as well as cellular metabolism. This efficient and low-cost material for water disinfection has a great potential for practical applications in the future.
研究领域:
环境科学
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材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Guangrong Qian,Renyuan Deng,Xiangmei Liu,Yi Wang,Jin Huang,Congyang Mao,Chaofeng Wang,Hanpeng Liu,Zhaoyang Li,Shengli Zhu,Hui Jiang,Zhenduo Cui,Yufeng Zheng,Shuilin Wu
The transmission of pathogenic bacteria via the contaminated surfaces of interactive touchscreens is an important route of infection. It is therefore imperative to develop a functional film with antibacterial properties to prevent cross-infection. In this paper, a bilayer thin-film structure composed of iron-doped and copper-doped zinc oxide (Fe-ZnO/Cu-ZnO) is synthesized through a spin coating technique based on sol-gel. The synergistic effects of metal ion doping, combined with the influence of the internal electric potential, during the photocatalytic reaction process, promote the separation and migration of photogenerated carriers. As a result, it notably boosts the photocatalytic properties. The nanofilm is demonstrated to achieve a rapid bactericidal effect (surpassing 90%) under sunlight irradiation. Furthermore, it is shown to completely kill bacteria after 20 min of illumination and to maintain excellent antibacterial performance (surpassing 90%) for a period of 30 days. Concurrently, the thin film displays both exceptional light transmittance (surpassing 90%) and noteworthy benefits, including environmental sustainability, cost-effectiveness, and the capacity for safe disinfection. The thin film exhibits considerable potential for implementation on surfaces subject to high-frequency public contact. It boasts extensive application prospects and serves as a foundational reference for the design of photocatalytic antibacterial thin films.
研究领域:
材料科学
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纳米技术
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光催化
·
环境科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2020
·
IF 6.146
Wenquan Gu,Wanjun Wang,Guiying Li,Haojing Xie,Po Keung Wong,Taicheng An
Surface defect modulation has emerged as a potential strategy for promoting the photocatalytic activity of photocatalysts for various applications, while the impact of the oxygen vacancy on bacterial inactivation is still debated. In this study, oxygen vacancies were introduced to tungsten trioxide nanosheets (WO 3– x ) via a microwave-assisted route. The as-prepared WO 3– x nanosheets exhibited excellent visible-light-driven photocatalytic activity toward E. coli K-12 inactivation, and 6 log orders of the bacterial cells could be completely inactivated within 150 min. The obtained bacterial inactivation rate constant was 15.2 times higher than that of pristine WO 3 without oxygen vacancies, suggesting that the surface oxygen vacancy could significantly promote the bacterial inactivation efficiency. The mechanism study indicated that the inactivation of bacterial cells occurs via a direct h + oxidation pathway. In addition, the role of the oxygen vacancy was studied in detail; the oxygen vacancy was found to not only promote interfacial charge separation but also tune the band structure of WO 3 , thereby leading to increased h + oxidation power. Finally, a possible oxygen vacancy-dominated photocatalytic bacterial inactivation mechanism is proposed. This work is expected to offer new insights into the microwave-assisted synthesis of defective photocatalysts and the use of the oxygen vacancy for promoting photocatalytic antibacterial activities.
研究领域:
材料科学
·
光催化
·
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 42
·425702
·
IF 2.9
Rui Li,Huilin Hu,Furong Xiong,Xiang Xue,Minqi Wu,Xuan Zuo,Wang Zhang,Xiangliang Pan
Efficient metal–organic frameworks (MOFs) photocatalytic bactericidal catalysts are urgently needed in water purification. Herein, a Fe-MOF (MIL-88B-NH2(V1Fe5) with promoted electron transport was achieved by vanadium (V) ions doping and V/Fe ratio optimization, showing excellent photocatalytic bactericidal activity against E. coli under visible light irradiation (99.92%). The efficient antibacterial mechanism, V as a Ti-like mediator boosting electronic transmission in MIL-88B-NH2(V1Fe5), was revealed by its band structure, transient photocurrent, electrochemical impedance spectroscopy, and scavenger quenching experiments. The enhancement of photocatalytic bactericidal performance of Fe-MOFs by V–ion-doping was confirmed by two other Fe-MOFs, MIL-53-NH2(V1Fe5) and MIL-101-NH2(V1Fe5), with the same metal ions and ligands, both of which have higher performance than the corresponding undoped MOFs. Among them, MIL-88B-NH2(V1Fe5) exhibits the highest photocatalytic bactericidal activity due to its suitable metal clusters ([M(μ3-O)] cluster) and topological structure (three-dimensional rhomboid network structure). This work demonstrated the amplification effect of V ion doping on electron transport in Fe-MOFs photocatalysts.
研究领域:
材料科学
·
环境科学
·
化学
·
光催化
✓ 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）