Free-standing and flow-through anodic TiO nanotube (TNT) membranes are gaining attention due to their unique synergy of properties and morphology, making them valuable in diverse research areas such as (photo)catalysis, energy conversion, environmental purification, sensors, and the biomedical field. The well-organized TiO nanotubes can be efficiently and cost-effectively produced through anodizing, while further utility of this material can be achieved by creating detached and flow-through membranes. This article reviews the latest advancements in the preparation, modification, and application of free-standing and flow-through anodic TiO nanotubes. It offers a comprehensive discussion of the factors influencing the morphology of the oxide and the potential mechanisms behind the electrochemical formation of TiO nanotubes. It examines methods for detachment and opening the bottom ends to prepare free-standing and flow-through TNT membranes and posttreatment strategies tailored to different applications. The article also provides an overview of recent applications of these materials in various fields, including hydrogen production, fuel and solar cells, batteries, pollutant diffusion and degradation, biomedical applications, micromotors, and electrochromic devices.
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http://dx.doi.org/10.3390/molecules29235638 | DOI Listing |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11643676 | PMC |
Molecules
November 2024
Department of Functional Materials and Hydrogen Technology, Faculty of Advanced Technologies and Chemistry, Military University of Technology, 2 Kaliskiego Street, 00908 Warsaw, Poland.
Adv Mater
September 2023
School of Physical Science and Technology, Shanghai Tech University, 393 Middle Huaxia Road, Shanghai, 201210, China.
Innovation in the ionotronics field has significantly accelerated the development of ultraflexible devices and machines. However, it is still challenging to develop efficient ionotronic-based fibers with necessary stretchability, resilience, and conductivity due to inherent conflict in producing spinning dopes with both high polymer and ion concentrations and low viscosities. Inspired by the liquid crystalline spinning of animal silk, this study circumvents the inherent tradeoff in other spinning methods by dry spinning a nematic silk microfibril dope solution.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
March 2023
Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520.
The release of wastewaters containing relatively low levels of nitrate (NO) results in sufficient contamination to induce harmful algal blooms and to elevate drinking water NO concentrations to potentially hazardous levels. In particular, the facile triggering of algal blooms by ultra-low concentrations of NO necessitates the development of efficient methods for NO destruction. However, promising electrochemical methods suffer from weak mass transport under low reactant concentrations, resulting in long treatment times (on the order of hours) for complete NO destruction.
View Article and Find Full Text PDFLab Chip
May 2021
Center for Biofilm Engineering, Montana State University, 214 Roberts Hall, Bozeman, MT 59717, USA. and Chemical and Biological Engineering Department, Montana State University, 214 Roberts Hall, Bozeman, MT 59717, USA.
Hydrogels are soft, water-based polymer gels that are increasingly used to fabricate free-standing fluidic devices for tissue and biological engineering applications. For many of these applications, pressurized liquid must be driven through the hydrogel device. To couple pressurized liquid to a hydrogel device, a common approach is to insert tubing into a hole in the gel; however, this usually results in leakage and expulsion of the tubing, and other options for coupling pressurized liquid to hydrogels remain limited.
View Article and Find Full Text PDFACS Nano
April 2021
Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany.
Bioinspired nanoconfined catalysis has developed to become an important tool for improving the performance of a wide range of chemical reactions. However, photocatalysis in a nanoconfined environment remains largely unexplored. Here, we report the application of a free-standing and flow-through carbon nitride nanotube (CNN) membrane with pore diameters of 40 nm for confined photocatalytic reactions where reactants are in contact with the catalyst for <65 ms, as calculated from the flow.
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