Encapsulation of colloidal semiconductor quantum dots into metal-organic frameworks for enhanced antibacterial activity through interfacial electron transfer

Wang, Mengjun; Nian, Linyu; Yaolan, Cheng; Yuan, Biao; Cheng, Shujie; Cao, Chongjiang

doi:10.1016/j.cej.2021.130832

Cited by 34 publications

(54 citation statements)

References 74 publications

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“…Finally, the bacteria are almost completely inactivated. Therefore, the reaction process possibly involved in the photocatalytic reaction is shown in the following formula [ 44 ]. AgBr/AgCl@ZIF-8 + h ν → (e − + h + ) e − + O 2 →·O 2 − organic pollutants (RhB) + ·O 2 − + h + → CO 2 + H 2 O Live bacteria + ·O 2 − + h + → Dead bacteria …”

Section: Resultsmentioning

confidence: 99%

Novel MOF-Based Photocatalyst AgBr/AgCl@ZIF-8 with Enhanced Photocatalytic Degradation and Antibacterial Properties

et al. 2022

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A novel visible light-driven AgBr/AgCl@ZIF-8 catalyst was synthesized by a simple and rapid method. The composition and structure of the photocatalyst were characterized by XRD, SEM, UV-DRS, and XPS. It could be observed that the 2-methylimidazole zinc salt (ZIF-8) exhibited the rhombic dodecahedron morphology with the AgCl and AgBr particles evenly distributed around it. The composite photocatalyst AgBr/AgCl@ZIF-8 showed good photocatalytic degradation and antibacterial properties. The degradation rate of RhB solution was 98%, with 60 min of irradiation of visible light, and almost all P. aeruginosaudomonas aeruginosa (P.aeruginosa), Staphylococcus aureus (S. aureus), and Escherichia coli (E. coli) were inactivated under the irradiation of 90 min. In addition, the prepared catalyst had excellent stability and reusability. Based on the free radical capture experiment, ·O2- and h+ were believed to be the main active substances, and possible photocatalytic degradation and sterilization mechanisms of AgBr/AgCl@ZIF-8 were proposed.

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Section: Resultsmentioning

confidence: 99%

Novel MOF-Based Photocatalyst AgBr/AgCl@ZIF-8 with Enhanced Photocatalytic Degradation and Antibacterial Properties

et al. 2022

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“…Although less investigated than the above-mentioned alternatives, other original metal-based nanostructures identified as MOF nanostructures, upconversion nanoplatforms, and alternate metal ion nanomaterials tend to further consolidate their promising potential for aPDT applications. Considering their towering surface area and porous ordered structure with substantial loading capacity (e.g., adsorption of O 2 and ensuing photocatalytic production of 1 O 2 via a heterogeneous process), stable versions of colloidal nano-MOFs-or less common covalent organic frameworks (COFs), i.e., reticulation variants typically defined by non-metal "nodes" instead of metal ones-have emerged as efficient heterogeneous photosensitizers-with frameworks acting as PSs or entrapping PSs-towards antimicrobial applications (e.g., enhanced penetration for bacterial biofilms eradication), with porphyrin-based or porphyrin-containing MOFs and COFs, or Cu-based MOFs embedded with CuS NPs for rapid NIR sterilization among recently reported solutions [197][198][199][200][201][202][203][204][205].…”

Section: Metal-organic Framework (Mof) Nanoscaffolds Upconversion Nan...mentioning

confidence: 99%

Antimicrobial Photodynamic Therapy: Latest Developments with a Focus on Combinatory Strategies

et al. 2021

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Antimicrobial photodynamic therapy (aPDT) has become a fundamental tool in modern therapeutics, notably due to the expanding versatility of photosensitizers (PSs) and the numerous possibilities to combine aPDT with other antimicrobial treatments to combat localized infections. After revisiting the basic principles of aPDT, this review first highlights the current state of the art of curative or preventive aPDT applications with relevant clinical trials. In addition, the most recent developments in photochemistry and photophysics as well as advanced carrier systems in the context of aPDT are provided, with a focus on the latest generations of efficient and versatile PSs and the progress towards hybrid-multicomponent systems. In particular, deeper insight into combinatory aPDT approaches is afforded, involving non-radiative or other light-based modalities. Selected aPDT perspectives are outlined, pointing out new strategies to target and treat microorganisms. Finally, the review works out the evolution of the conceptually simple PDT methodology towards a much more sophisticated, integrated, and innovative technology as an important element of potent antimicrobial strategies.

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“…Wang et al encapsulated ZnAgInS quantum dots (QDs) into MOFs materials of ZIF-8 to form a ZnAgInS QDs@ZIF-8 heterojunction, which exhibited excellent antibacterial performance. 45 This can be assigned to two main reasons: (I) In the heterojunction, the S 2− in the ZnAgInS QDs and Zn 2+ in ZIF-8 can form interfacial bonds (Zn−S), are beneficial for electron−hole (e − −h + ) pair separation. (II) The encapsulated ZnAgInS quantum dots narrow the bandgap of ZIF-8 and enhance the visible-light absorption of ZIF-8.…”

Section: ■ Introductionmentioning

confidence: 99%

Fabrication of a Covalent Organic Framework-Based Heterojunction via Coupling with ZnAgInS Nanosphere with High Photocatalytic Activity

et al. 2022

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Covalent organic frameworks (COFs) exhibit visible-light activity for the degradation of organic pollutants. However, the recombination rates of their photoinduced electron− hole pairs are relatively high, limiting their practical application. In this work, we fabricated a 1,3,5-triformylphloroglucinol (Tp) and p-phenylenediamine (Pa-1) (TpPa-1) COF-based heterojunction through coupling the TpPa-1 COF with a ZnAgInS nanosphere via a facile oil bath heating method. The results show that the prepared heterojunction exhibits outstanding catalytic activity for the degradation of high concentrations the antibiotic tetracycline (TC) and the dye rhodamine B (RhB), which is driven by simulated sunlight. Its degradation rates for RhB and TC were 30× and 18× higher than that of the pure TpPa-1 COF, respectively. The greatly enhanced photocatalytic performances can be ascribed to the formed heterojunction with good band-gap match, which promotes the migration and separation of light-induced electrons and holes and increases both light absorbance and the specific surface area. This study introduces an effective and feasible strategy for improving the photocatalytic performances of COFs via subtly integrating TpPa-1 COFs with a ZnAgInS nanosphere into an organic−inorganic hybrid. The results of the photocatalytic experiments indicate that the fabricated hybrid has a potential application in the highly efficient removal of organic pollutants.

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Encapsulation of colloidal semiconductor quantum dots into metal-organic frameworks for enhanced antibacterial activity through interfacial electron transfer

Cited by 34 publications

References 74 publications

Novel MOF-Based Photocatalyst AgBr/AgCl@ZIF-8 with Enhanced Photocatalytic Degradation and Antibacterial Properties

Novel MOF-Based Photocatalyst AgBr/AgCl@ZIF-8 with Enhanced Photocatalytic Degradation and Antibacterial Properties

Antimicrobial Photodynamic Therapy: Latest Developments with a Focus on Combinatory Strategies

Fabrication of a Covalent Organic Framework-Based Heterojunction via Coupling with ZnAgInS Nanosphere with High Photocatalytic Activity

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