Publications
364 results found
Xiong W, Porwal H, Luo H, et al., 2020, Photocatalytic activity of 2D nanosheets of ferroelectric Dion-Jacobson compounds, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 8, Pages: 6564-6568, ISSN: 2050-7488
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- Citations: 12
Gao Q, Titirici M-M, 2020, Achieving high volumetric EDLC carbons via hydrothermal carbonization and cyclic activation, JOURNAL OF PHYSICS-ENERGY, Vol: 2, ISSN: 2515-7655
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- Citations: 4
Olsson E, Cottom J, Au H, et al., 2020, Elucidating the Effect of Planar Graphitic Layers and Cylindrical Pores on the Storage and Diffusion of Li, Na, and K in Carbon Materials, ADVANCED FUNCTIONAL MATERIALS, Vol: 30, ISSN: 1616-301X
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- Citations: 37
Chambon CL, Fitriyanti V, Verdía P, et al., 2020, Fractionation by sequential antisolvent precipitation of grass, softwood, and hardwood lignins isolated using low-cost ionic liquids and water, ACS Sustainable Chemistry & Engineering, Vol: 8, Pages: 3751-3761, ISSN: 2168-0485
In this study, fractionation by sequential antisolvent precipitation was applied to ionoSolv lignins for the first time. Pretreatment with the aqueous low-cost protic ionic liquid N,N-dimethylbutylammonium hydrogen sulfate ([DMBA][HSO4], 80 wt % in water) was applied to Miscanthus (herbaceous), willow (hardwood), and pine (softwood) to extract lignin. Then, lignin was sequentially precipitated by the addition of water as an antisolvent. Fractionation appeared to be controlled by the molecular weight of lignin polymers. Fractions isolated with minimal water volumes were shown to have high molecular weight, polydispersity, thermal stability, and Tg (178 °C). Later precipitates were more monodisperse and had high phenolic and total hydroxyl content and lower thermal stability and Tg (136 °C). Addition of 1 g of water per gram of dry IL was able to precipitate up to 90 wt % of lignin. Fractional precipitation represents a novel lignin isolation technique that can be performed as part of the lignin recovery procedure enabling a high degree of control of lignin properties. The effect of the fractionation on lignin structural, chemical, and thermal properties was thoroughly examined by two-dimensional heteronuclear single quantum coherence nuclear magnetic resonance, gel permeation chromatography, thermogravimetric analysis, and differential scanning calorimetry and compared to the unfractionated lignin precipitate obtained by addition of an excess of water.
Herou S, Crespo M, Titirici M, 2020, Investigating the effects of activating agent morphology on the porosity and related capacitance of nanoporous carbons, CRYSTENGCOMM, Vol: 22, Pages: 1560-1567
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- Citations: 5
Wu Y, Okesola BO, Xu J, et al., 2020, Disordered protein-graphene oxide co-assembly and supramolecular biofabrication of functional fluidic devices, NATURE COMMUNICATIONS, Vol: 11, ISSN: 2041-1723
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- Citations: 39
Liu J, Yuan H, Tao X, et al., 2020, Recent progress on biomass-derived ecomaterials toward advanced rechargeable lithium batteries, ECOMAT, Vol: 2
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- Citations: 112
Jorge AB, Jervis R, Periasamy AP, et al., 2020, 3D Carbon Materials for Efficient Oxygen and Hydrogen Electrocatalysis, ADVANCED ENERGY MATERIALS, Vol: 10, ISSN: 1614-6832
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- Citations: 124
Baragau I-A, Power NP, Morgan DJ, et al., 2020, Continuous hydrothermal flow synthesis of blue-luminescent, excitation-independent nitrogen-doped carbon quantum dots as nanosensors, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 8, Pages: 3270-3279, ISSN: 2050-7488
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- Citations: 48
Ribadeneyra MC, Grogan L, Au H, et al., 2020, Lignin-derived electrospun freestanding carbons as alternative electrodes for redox flow batteries, CARBON, Vol: 157, Pages: 847-856, ISSN: 0008-6223
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- Citations: 28
Jensen ACS, Olsson E, Au H, et al., 2020, Local mobility in electrochemically inactive sodium in hard carbon anodes after the first cycle, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 8, Pages: 743-749, ISSN: 2050-7488
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- Citations: 25
Urbina-Blanco CA, Jilani SZ, Speight IR, et al., 2020, A Diverse View of Science to Catalyse Change, Angewandte Chemie, ISSN: 0044-8249
Huang B, Liu Y, Guo Q, et al., 2020, Porous carbon nanosheets from biological nucleobase precursor as efficient pH-independent oxygen reduction electrocatalyst, CARBON, Vol: 156, Pages: 179-186, ISSN: 0008-6223
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- Citations: 40
Xie F, Xu Z, Jensen ACS, et al., 2019, Unveiling the role of hydrothermal carbon dots as anodes in sodium-ion batteries with ultrahigh initial coulombic efficiency, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 7, Pages: 27567-27575, ISSN: 2050-7488
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- Citations: 60
Papaioannou N, Titirici M-M, Sapelkin A, 2019, Investigating the effect of reaction time on carbon dot formation, structure, and optical properties, ACS Omega, Vol: 4, Pages: 21658-21665, ISSN: 2470-1343
Carbon dots, a young member of the carbon nanomaterial family, are quasi-spherical nanoparticles, which have fluorescent properties as their key characteristic. A wide range of starting materials and synthetic routes have been reported in the literature, divided into two main categories: a top-down and bottom-up approach. Moreover, a series of different parameters that affect the properties of carbon dots have been investigated, including temperature, starting pH, as well as precursor concentration. However, the effect of reaction time has not been extensively monitored. In our study, a biomass derivative was treated hydrothermally with varying reaction times to draw a solid formation mechanism. In addition, we monitored the effect of reaction time on optical and structural characteristics, as well as the chemical composition of our materials. Our key findings include a four-stage formation mechanism, a higher level of crystallinity, and an increasing brightness over reaction time.
Liu J, Yuan H, Cheng X-B, et al., 2019, A review of naturally derived nanostructured materials for safe lithium metal batteries, MATERIALS TODAY NANO, Vol: 8, ISSN: 2588-8420
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- Citations: 39
Li Y, Lu Y, Meng Q, et al., 2019, Regulating Pore Structure of Hierarchical Porous Waste Cork-Derived Hard Carbon Anode for Enhanced Na Storage Performance, ADVANCED ENERGY MATERIALS, Vol: 9, ISSN: 1614-6832
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- Citations: 174
Chakrabarti B, Yufit V, Kavei A, et al., 2019, Charge/discharge and cycling performance of flexible carbon paper electrodes in a regenerative hydrogen/vanadium fuel cell, INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, Vol: 44, Pages: 30093-30107, ISSN: 0360-3199
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- Citations: 13
Yang P, Wang L, Zhuzhang H, et al., 2019, Photocarving nitrogen vacancies in a polymeric carbon nitride for metal-free oxygen synthesis, APPLIED CATALYSIS B-ENVIRONMENTAL, Vol: 256, ISSN: 0926-3373
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- Citations: 78
Volpe R, Menendez JMB, Reina TR, et al., 2019, Free radicals formation on thermally decomposed biomass, FUEL, Vol: 255, ISSN: 0016-2361
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- Citations: 19
Luo H, Papaioannou N, Salvadori E, et al., 2019, Manipulating the Optical Properties of Carbon Dots by Fine-Tuning their Structural Features, CHEMSUSCHEM, Vol: 12, Pages: 4432-4441, ISSN: 1864-5631
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- Citations: 6
Edge J, Cooper SJ, Aguadero A, et al., 2019, UK Research on Materials for Electrochemical Devices, JOHNSON MATTHEY TECHNOLOGY REVIEW, Vol: 63, Pages: 255-260, ISSN: 2056-5135
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- Citations: 1
Li Y, Lu Y, Adelhelm P, et al., 2019, Intercalation chemistry of graphite: alkali metal ions and beyond., Chem Soc Rev
Reversibly intercalating ions into host materials for electrochemical energy storage is the essence of the working principle of rocking-chair type batteries. The most relevant example is the graphite anode for rechargeable Li-ion batteries which has been commercialized in 1991 and still represents the benchmark anode in Li-ion batteries 30 years later. Learning from past lessons on alkali metal intercalation in graphite, recent breakthroughs in sodium and potassium intercalation in graphite have been demonstrated for Na-ion batteries and K-ion batteries. Interestingly, some significant differences proved to exist for the intercalation of Na+ and K+ into graphite compared with the Li+ case. Such different host-guest interactions are unique depending on the host materials and electrolytes, which greatly contribute to a deeper understanding of intercalation-type electrode materials for next generation alkali metal ion batteries. This review summarizes significant advances from both experimental and theoretical calculations with a focus on comparing the intercalation of three alkali metal ions (Li+, Na+, K+) into graphite and aims to clarify the intimate host-guest relationships and the underlying mechanisms. New approaches developed to achieve favorable intercalation coupled with the challenges in this field are also discussed. We also extrapolate alkali metal ion intercalation in graphite to mono-/multi-valent ions in layered electrode materials, which will deepen the understanding of intercalation chemistry and provide guidance to explore new guests and hosts.
Xu Z, Xie F, Wang J, et al., 2019, All-Cellulose-Based Quasi-Solid-State Sodium-Ion Hybrid Capacitors Enabled by Structural Hierarchy, ADVANCED FUNCTIONAL MATERIALS, Vol: 29, ISSN: 1616-301X
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- Citations: 63
Saning A, Herou S, Dechtrirat D, et al., 2019, Green and sustainable zero-waste conversion of water hyacinth (Eichhornia crassipes) into superior magnetic carbon composite adsorbents and supercapacitor electrodes, RSC ADVANCES, Vol: 9, Pages: 24248-24258
Titirici M, 2019, Defects win over pyridinic sites, NATURE CATALYSIS, Vol: 2, Pages: 642-643, ISSN: 2520-1158
Ren W, Cheng J, Ou H, et al., 2019, Enhancing Visible-Light Hydrogen Evolution Performance of Crystalline Carbon Nitride by Defect Engineering., ChemSusChem, Vol: 12, Pages: 3257-3262
Crystalline carbon nitride (CCN)-based semiconductors have recently attracted widespread attention in solar energy conversion. However, further modifying the photocatalytic ability of CCN always results in a trade-off between high crystallinity and good photocatalytic performance. Herein, a facile defect engineering strategy was demonstrated to modify the CCN photocatalysts. Results confirmed that the obtained D-CCN maintained the high crystallinity; additionally, the hydrogen production rate of D-CCN was approximately 8 times higher than that of CCN. Particularly, it could produce H2 even if the incident light wavelength extended to 610 nm. The significantly improved photocatalytic activity could be ascribed to the introduction of defects into the CCN polymer network to form the midgap states, which significantly broadened the visible-light absorption range and accelerated the charge separation for photoredox catalysis.
Matos J, Ocares-Riquelme J, Poon PS, et al., 2019, C-doped anatase TiO<sub>2</sub>: Adsorption kinetics and photocatalytic degradation of methylene blue and phenol, and correlations with DFT estimations, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 547, Pages: 14-29, ISSN: 0021-9797
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- Citations: 72
Ou H, Tang C, Zhang Y, et al., 2019, Se-modified polymeric carbon nitride nanosheets with improved photocatalytic activities, Journal of Catalysis, Vol: 375, Pages: 104-112, ISSN: 0021-9517
Titirici M, Li A, Nicolae S, et al., 2019, Bridging the gap between Homogenous Heterogenous and Electro-Catalysis: Iron-nitrogen molecular complexes within carbon materials for catalytic applications, ChemCatChem, ISSN: 1867-3880
High activity, selectivity and recyclability are crucial parameters in the design of performant catalysts. Furthermore, depletion of platinum‐group metals (PGM) drives further research towards highly available metal‐based catalysts. In this framework, iron based active sites supported on nitrogen‐doped carbon materials (Fe/N@C) have been explored to tackle important applications in organic chemistry, for both oxidation and reduction of C‐O/C‐N bonds, as well as in electrocatalysis for energy applications. This versatile reactivity makes them ideal substitutes to PGM‐based catalysts, being based on abundant elements. Despite important advances in material science and characterisation techniques allowing the analysis of heterogeneous/electro‐ catalysts at the atomic scale, the nature of the catalytically active sites in Fe/N@C remains elusive. Most recent theoretical studies point at individual FeNx single sites as the origin of the catalytic activity. Although their identification is still challenging with current technology, establishing their real nature will foster further research on these PGM‐free and redox‐polyvalent catalysts. In this review, we provide an overview of their applications in both thermal and electrochemical processes. Throughout the review, we highlight the different characterisation techniques employed to gain insight into the catalysts active sites.
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