Metal-organic frameworks (MOFs) have emerged as promising templates and precursors that can be converted to a series of functional materials. Probing the dynamic conversion processes within individual MOF crystal particles in real-time is key to understanding the structure-activity relationship, but this remains challenging, particularly for anisotropic MOF crystals. Here, using dark-field optical microscopy, we visually image and quantify the dynamic oxidation conversion of a single bismuth-based metal-organic framework (Bi-MOF) into bismuth oxides by NaClO. The reactivity of single rod-shaped Bi-MOFs is anisotropic, and its two ends have higher activity than those in the middle regions, which depend on the aspect ratio. Through analysis of the channel directions and theoretical diffusion coefficients, this anisotropic behavior may be attributed to the inherently low diffusion barrier of the NaClO oxidant due to the larger accessible rectangular channels at both ends along the -axis. Our findings unveil comprehensive kinetic information about the MOF conversion reaction at the subparticle level, favoring the design of future MOF-derived materials.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.jpclett.5c00008 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Imaging Aspect Ratio-Dependent Anisotropic Conversion of Bismuth-Based Metal-Organic Frameworks into Bismuth Oxides.
J Phys Chem Lett
March 2025
School of Nuclear Science & Technology, Southwest University of Science and Technology, Mianyang 621010, P. R. China.
Metal-organic frameworks (MOFs) have emerged as promising templates and precursors that can be converted to a series of functional materials. Probing the dynamic conversion processes within individual MOF crystal particles in real-time is key to understanding the structure-activity relationship, but this remains challenging, particularly for anisotropic MOF crystals. Here, using dark-field optical microscopy, we visually image and quantify the dynamic oxidation conversion of a single bismuth-based metal-organic framework (Bi-MOF) into bismuth oxides by NaClO.
View Article and Find Full Text PDFRegulating the Ligand N-Heterocyclic Coordination in Bismuth-Based MOFs for Efficient CO Photoreduction.
Chemistry
March 2025
Key Laboratory of Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan, 430205, P. R. China.
The increasing global concern over environmental degradation and resource depletion has driven the search for sustainable technologies to mitigate CO emissions. Recently, bismuth-based metal organic frameworks (Bi-MOFs) have garnered significant attention due to their high stability, adjustable porosity, and excellent light absorption properties. However, weak visible light absorption and charge recombination are still obstacles to wide application.
View Article and Find Full Text PDFOptimizing adsorption and photocatalysis for tetracycline and sulfamethoxazole removal: the role of Ag and NH in Bi-MOF derivatives.
RSC Adv
January 2025
Department of Food Science and Biotechnology, Gachon University 1342 Seongnamdaero Sujeong-gu Seongnam-si 13120 Republic of Korea
This study focuses on the synthesis, characterization, and evaluation of the photocatalytic efficiency of bismuth-based metal-organic frameworks (Bi-MOFs) and their derivatives, specifically Ag/Bi-MOF and NH /Ag/Bi-MOF, in the degradation of tetracycline (TC) and sulfamethoxazole (SMX) under visible light irradiation. Bi-MOFs are promising photocatalysts due to their large surface area, tunable porosity, and unique electronic properties that are favorable for visible light absorption. In this study, Bi-MOFs were synthesized using a solvothermal method, with the incorporation of silver (Ag) and ammonium (NH ) ions to enhance their photocatalytic performance.
View Article and Find Full Text PDFHighly sensitive electrochemical sensor for lead ions based on Bi-MOF/conducting polymer composites.
Chemosphere
February 2025
Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China. Electronic address:
Article Synopsis
- Researchers chemically polymerized conductive polyaniline (PANI) on a bismuth-based metal-organic framework (Bi-MOF) to create PANI@Bi-MOF composites.
- Characterization techniques like FT-IR, PXRD, SEM, and TEM confirmed the successful coating and uniform distribution of PANI on Bi-MOF.
- The resulting composites were used to develop an electrochemical sensor for lead ion detection, achieving a low detection limit and successfully identifying Pb in real water samples without interference from other metals.
A four in one nanoplatform: Theranostic bismuth-containing nanoMOFs for chemo-photodynamic- radiation therapy and CT scan imaging.
Int J Pharm
January 2025
Department of Radiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Integration of different therapeutic performances into one platform is an innovative development for using multiple applications in real-time. In this paper, for the first time we exploited the concurrent capacity of radio and photosensitizing in a theranostic nanoMOFs based on bismuth, zirconium, and porphyrin. The porosity of nanoMOFs provided the capability of doxorubicin loading and chemotherapy besides enhanced photodynamic and radiation therapy (PDT & RT).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!