15 results found
Tian T, Xu J, Xiong Y, et al., 2022, Cu-functionalised porous boron nitride derived from a metal–organic framework, Journal of Materials Chemistry A, Vol: 10, Pages: 20580-20592, ISSN: 2050-7488
Porous boron nitride (BN) displays promising properties for interfacial and bulk processes, e.g. molecular separation and storage, or (photo)catalysis. To maximise porous BN's potential in such applications, tuning and controlling its chemical and structural features is key. Functionalisation of porous BN with metal nanoparticle represents one possible route, albeit a hardly explored one. Metal–organic frameworks (MOFs) have been widely used as precursors to synthesise metal functionalised porous carbon-based materials, yet MOF-derived metal functionalised inorganic porous materials remain unexplored. Here, we hypothesise that MOFs could also serve as a platform to produce metal-functionalised porous BN. We have used a Cu-containing MOF, i.e. Cu/ZIF-8, as a precursor and successfully obtained porous BN functionalised with Cu nanoparticles (i.e. Cu/BN). While we have shown control of the Cu content, we have not yet demonstrated it for the nanoparticle size. The functionalisation has led to improved light harvesting and enhanced electron–hole separation, which have had a direct positive impact on the CO2 photoreduction activity (production formation rate 1.5 times higher than pristine BN and 12.5 times higher than g-C3N4). In addition, we have found that the metal in the MOF precursor impacts porous BN's purity. Unlike Cu/ZIF-8, a Co-containing ZIF-8 precursor led to porous C-BN (i.e. BN with a large amount of C in the structure). Overall, given the diversity of metals in MOFs, one could envision our approach as a method to produce a library of different metal functionalised porous BN samples.
Petit C, L'Hermitte A, Dawson D, et al., 2021, Formation mechanism and porosity development in porous boron nitride, The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter, Vol: 125, Pages: 27429-27439, ISSN: 1932-7447
Porous boron nitride (BN) has proven promising as a novel class of inorganic materials in the field of separations and particularly adsorption. Owing to its high surface area and thermal stability, porous BN has been researched for CO2 capture and water cleaning, for instance. However, research remains at the laboratory scale due to a lack of understanding of the formation mechanism of porous BN, which is largely a “black box” and prevents scale up. Partial reaction pathways have been unveiled, but they omit critical steps in the formation, including the porosity development, which is key to adsorption. To unlock the potential of porous BN at a larger scale, we have investigated its formation from the perspective of both chemical formation and porosity development. We have characterized reaction intermediates obtained at different temperatures with a range of analytical and spectroscopic tools. Using these analyses, we propose a mechanism highlighting the key stages of BN formation, including intermediates and gaseous species formed in the process. We identified the crucial formation of nonporous carbon nitride to form porous BN with release of porogens, such as CO2. This work paves the way for the use of porous BN at an industrial level for gas and liquid separations.
Xiong Y, Woodward RT, Danaci D, et al., 2021, Understanding trade-offs in adsorption capacity, selectivity and kinetics for propylene/propane separation using composites of activated carbon and hypercrosslinked polymer, CHEMICAL ENGINEERING JOURNAL, Vol: 426, ISSN: 1385-8947
Tian T, Hou J, Ansari H, et al., 2021, Mechanically stable structured porous boron nitride with high volumetric adsorption capacity, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 9, Pages: 13366-13373, ISSN: 2050-7488
Tian T, 2020, Composite Metal Organic Framework Materials, Processes for Their Manufacture and Uses Thereof, PCT / EP2018 / 060986
Senanayak SP, Abdi-Jalebi M, Kamboj VS, et al., 2020, A general approach for hysteresis-free, operationally stable metal halide perovskite field-effect transistors, SCIENCE ADVANCES, Vol: 6, ISSN: 2375-2548
Mehta JP, Tian T, Zeng Z, et al., 2018, Sol-Gel Synthesis of Robust Metal-Organic Frameworks for Nanoparticle Encapsulation, ADVANCED FUNCTIONAL MATERIALS, Vol: 28, ISSN: 1616-301X
Tian T, Zeng Z, Vulpe D, et al., 2018, A sol-gel monolithic metal-organic framework with enhanced methane uptake, NATURE MATERIALS, Vol: 17, Pages: 174-+, ISSN: 1476-1122
Tian T, Wharmby MT, Parra JB, et al., 2016, Role of crystal size on swing-effect and adsorption induced structure transition of ZIF-8, DALTON TRANSACTIONS, Vol: 45, Pages: 6893-6900, ISSN: 1477-9226
Calahorro AJ, Oyarzabal I, Fernandez B, et al., 2016, Rare earth anthracenedicarboxylate metal-organic frameworks: slow relaxation of magnetization of Nd<SUP>3+</SUP>, Gd<SUP>3+</SUP>, Dy<SUP>3+</SUP>, Er<SUP>3+</SUP> and Yb<SUP>3+</SUP> based materials, DALTON TRANSACTIONS, Vol: 45, Pages: 591-598, ISSN: 1477-9226
Tian T, 2015, METAL - ORGANIC FRAMEWORKS, US9884309B2
Tian T, Velazquez-Garcia J, Bennett TD, et al., 2015, Mechanically and chemically robust ZIF-8 monoliths with high volumetric adsorption capacity, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 3, Pages: 2999-3005, ISSN: 2050-7488
Tan NY, Ruggiero MT, Orellana-Tavra C, et al., 2015, Investigation of the terahertz vibrational modes of ZIF-8 and ZIF-90 with terahertz time-domain spectroscopy, CHEMICAL COMMUNICATIONS, Vol: 51, Pages: 16037-16040, ISSN: 1359-7345
Orellana-Tavra C, Baxter EF, Tian T, et al., 2015, Amorphous metal-organic frameworks for drug delivery, CHEMICAL COMMUNICATIONS, Vol: 51, Pages: 13878-13881, ISSN: 1359-7345
Chen R, Zhao T, Tian T, et al., 2014, Graphene-wrapped sulfur/metal organic framework-derived microporous carbon composite for lithium sulfur batteries, APL MATERIALS, Vol: 2, ISSN: 2166-532X
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