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Li, Y., Zhu, L., Zhao, J., Qiu, M., Liu, J., He, J., . . . Rong, L. (2022). Facile synthesis of a high-efficiency NiFe bimetallic catalyst without pre-reduction for the selective hydrogenation reaction of furfural. Catalysis Science & Technology, 13(2), 457-467
Open this publication in new window or tab >>Facile synthesis of a high-efficiency NiFe bimetallic catalyst without pre-reduction for the selective hydrogenation reaction of furfural
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2022 (English)In: Catalysis Science & Technology, ISSN 2044-4753, E-ISSN 2044-4761, Vol. 13, no 2, p. 457-467Article in journal (Refereed) Published
Abstract [en]

A high-efficiency nickel-iron bimetallic catalyst (Ni3Fe1 alloy) was synthesized by a facile solvothermal reaction and directly used in furfural hydrogenation without pre-reduction. When the total metal acetate was 6 mmol (Ni : Fe = 4 : 2) with 2 mmol sodium acetate under reaction conditions of 1 MPa H2 pressure at 130 °C for 1 h, the conversion for furfural and selectivity for furfuryl alcohol were both more than 98%. XRD, BET, H2-TPD, SEM, HRTEM, EDS, ICP-MS and ex/in situ XPS were used to characterize the catalysts. Compared to the monometallic Ni catalyst, the introduction of Fe not only enhanced the hydrogen adsorption capacity of Ni but also forms NiFe2O4 on the surface of the catalyst to protect the internal crystals from further oxidation and maintain hydrogenation ability. Moreover, the introduction of Na increased the purity of the Ni3Fe1 crystal of the catalyst and reinforced the interaction between Ni and Fe, resulting in an improvement in hydrogenation performance. Based on density functional theory (DFT) calculations, the reaction mechanism was systematically investigated. The results of five recycling tests show excellent catalyst stability. The environmentally friendly synthetic process, high stability, catalytic efficiency and the ability to function without a pre-reduction step make the nickel-iron bimetallic catalyst an ideal, commercial candidate for the furfural hydrogenation reaction.

Place, publisher, year, edition, pages
Royal Society of Chemistry (RSC), 2022
National Category
Physical Chemistry
Identifiers
urn:nbn:se:kth:diva-328716 (URN)10.1039/d2cy01599d (DOI)000893456300001 ()2-s2.0-85144049690 (Scopus ID)
Note

QC 20230610

Available from: 2023-06-10 Created: 2023-06-10 Last updated: 2023-06-10Bibliographically approved
Melianas, A., Kang, M., VahidMohammadi, A., Quill, T. J., Tian, W., Gogotsi, Y., . . . Hamedi, M. (2022). High-Speed Ionic Synaptic Memory Based on 2D Titanium Carbide MXene. Advanced Functional Materials, 32(12), 2109970, Article ID 2109970.
Open this publication in new window or tab >>High-Speed Ionic Synaptic Memory Based on 2D Titanium Carbide MXene
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2022 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 32, no 12, p. 2109970-, article id 2109970Article in journal (Refereed) Published
Abstract [en]

Synaptic devices with linear high-speed switching can accelerate learning in artificial neural networks (ANNs) embodied in hardware. Conventional resistive memories however suffer from high write noise and asymmetric conductance tuning, preventing parallel programming of ANN arrays. Electrochemical random-access memories (ECRAMs), where resistive switching occurs by ion insertion into a redox-active channel, aim to address these challenges due to their linear switching and low noise. ECRAMs using 2D materials and metal oxides however suffer from slow ion kinetics, whereas organic ECRAMs enable high-speed operation but face challenges toward on-chip integration due to poor temperature stability of polymers. Here, ECRAMs using 2D titanium carbide (Ti3C2Tx) MXene that combine the high speed of organics and the integration compatibility of inorganic materials in a single high-performance device are demonstrated. These ECRAMs combine the speed, linearity, write noise, switching energy, and endurance metrics essential for parallel acceleration of ANNs, and importantly, they are stable after heat treatment needed for back-end-of-line integration with Si electronics. The high speed and performance of these ECRAMs introduces MXenes, a large family of 2D carbides and nitrides with more than 30 stoichiometric compositions synthesized to date, as promising candidates for devices operating at the nexus of electrochemistry and electronics.

Place, publisher, year, edition, pages
Wiley, 2022
Keywords
2D materials, analog resistive memories, electrochemical random-access memories, linear switching, mixed ionic–electronic conductors, molecular self-assembly, MXenes, neuromorphic computing, Functional materials, Neural networks, Self assembly, 2d material, Analog resistive memory, Electrochemical random-access memory, Electrochemicals, Mixed ionic-electronic conductors, Molecular self assembly, Random access memory, Resistive memory, Switching
National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-313255 (URN)10.1002/adfm.202109970 (DOI)000720741200001 ()2-s2.0-85119507500 (Scopus ID)
Note

QC 20220615

Available from: 2022-06-15 Created: 2022-06-15 Last updated: 2022-12-12Bibliographically approved
Rostami, J., Benselfelt, T., Maddalena, L., Avci, C., Sellman, F. A., Ciftci, G. C., . . . Wågberg, L. (2022). Shaping 90 wt% NanoMOFs into Robust Multifunctional Aerogels Using Tailored Bio-Based Nanofibrils. Advanced Materials, 34(38), Article ID 2204800.
Open this publication in new window or tab >>Shaping 90 wt% NanoMOFs into Robust Multifunctional Aerogels Using Tailored Bio-Based Nanofibrils
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2022 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 34, no 38, article id 2204800Article in journal (Refereed) Published
Abstract [en]

Metal–organic frameworks (MOFs) are hybrid porous crystalline networks with tunable chemical and structural properties. However, their excellent potential is limited in practical applications by their hard-to-shape powder form, making it challenging to assemble MOFs into macroscopic composites with mechanical integrity. While a binder matrix enables hybrid materials, such materials have a limited MOF content and thus limited functionality. To overcome this challenge, nanoMOFs are combined with tailored same-charge high-aspect-ratio cellulose nanofibrils (CNFs) to manufacture robust, wet-stable, and multifunctional MOF-based aerogels with 90 wt% nanoMOF loading. The porous aerogel architectures show excellent potential for practical applications such as efficient water purification, CO2 and CH4 gas adsorption and separation, and fire-safe insulation. Moreover, a one-step carbonization process enables these aerogels as effective structural energy-storage electrodes. This work exhibits the unique ability of high-aspect-ratio CNFs to bind large amounts of nanoMOFs in structured materials with outstanding mechanical integrity—a quality that is preserved even after carbonization. The demonstrated process is simple and fully discloses the intrinsic potential of the nanoMOFs, resulting in synergetic properties not found in the components alone, thus paving the way for MOFs in macroscopic multifunctional composites. 

Place, publisher, year, edition, pages
Wiley, 2022
Keywords
aerogels, cellulose nanofibrils, flame retardancy, gas adsorption and separation, metal–organic frameworks, supercapacitors, water purification, Aspect ratio, Carbonization, Crystalline materials, Gas adsorption, Hybrid materials, Nanocellulose, Nanofibers, Supercapacitor, Bio-based, Crystalline networks, Flame-retardancy, Gas adsorption and separations, High aspect ratio, Mechanical integrity, Metalorganic frameworks (MOFs), Nano-fibrils, Binders, Composites, Loading, Materials, Powder, Processes
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-326793 (URN)10.1002/adma.202204800 (DOI)000840897400001 ()35906189 (PubMedID)2-s2.0-85135930335 (Scopus ID)
Note

QC 20230515

Available from: 2023-05-15 Created: 2023-05-15 Last updated: 2024-05-21Bibliographically approved
Liu, C., Tan, L., Zhang, L., Tian, W. & Ma, L. (2021). A Review of the Distribution of Antibiotics in Water in Different Regions of China and Current Antibiotic Degradation Pathways. Frontiers in Environmental Science, 9, Article ID 692298.
Open this publication in new window or tab >>A Review of the Distribution of Antibiotics in Water in Different Regions of China and Current Antibiotic Degradation Pathways
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2021 (English)In: Frontiers in Environmental Science, E-ISSN 2296-665X, Vol. 9, article id 692298Article, review/survey (Refereed) Published
Abstract [en]

Antibiotic pollution is becoming an increasingly serious threat in different regions of China. The distribution of antibiotics in water sources varies significantly in time and space, corresponding to the amount of antibiotics used locally. The main source of this contamination in the aquatic environment is wastewater from antibiotic manufacturers, large scale animal farming, and hospitals. In response to the excessive antibiotic contamination in the water environment globally, environmentally friendly alternatives to antibiotics are being developed to reduce their use. Furthermore, researchers have developed various antibiotic treatment techniques for the degradation of antibiotics, such as physical adsorption, chemical oxidation, photodegradation, and biodegradation. Among them, biodegradation is receiving increasing attention because of its low cost, ease of operation, and lack of secondary pollution. Antibiotic degradation by enzymes could become the key strategy of management of antibiotics pollution in the environment in future. This review summarizes research on the distribution of antibiotics in China's aquatic environments and different techniques for the degradation of antibiotics. Special attention is paid to their degradation by various enzymes. The adverse effects of the pollutants and need for more effective monitoring and mitigating pollution are also highlighted.

Place, publisher, year, edition, pages
Frontiers Media SA, 2021
Keywords
antibiotic contamination, antibiotic resistance, enzyme degradation, water environment, ecosystems
National Category
Environmental Sciences
Identifiers
urn:nbn:se:kth:diva-299044 (URN)10.3389/fenvs.2021.692298 (DOI)000668720100001 ()2-s2.0-85109080234 (Scopus ID)
Note

QC 20210730

Available from: 2021-07-30 Created: 2021-07-30 Last updated: 2023-02-01Bibliographically approved
Liu, C., Zhang, L., Tan, L., Liu, Y., Tian, W. & Ma, L. (2021). Immobilized Crosslinked Pectinase Preparation on Porous ZSM-5 Zeolites as Reusable Biocatalysts for Ultra-Efficient Hydrolysis of beta-Glycosidic Bonds. Frontiers in Chemistry, 9, Article ID 677868.
Open this publication in new window or tab >>Immobilized Crosslinked Pectinase Preparation on Porous ZSM-5 Zeolites as Reusable Biocatalysts for Ultra-Efficient Hydrolysis of beta-Glycosidic Bonds
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2021 (English)In: Frontiers in Chemistry, E-ISSN 2296-2646, Vol. 9, article id 677868Article in journal (Refereed) Published
Abstract [en]

In this study, we immobilized pectinase preparation on porous zeolite ZSM-5 as an enzyme carrier. We realized this immobilized enzyme catalyst, pectinase preparation@ZSM-5, via a simple combined strategy involving the van der Waals adsorption of pectinase preparation followed by crosslinking of the adsorbed pectinase preparation with glutaraldehyde over ZSM-5. Conformal pectinase preparation coverage of various ZSM-5 supports was achieved for the as-prepared pectinase preparation@ZSM-5. The porous pectinase preparation@ZSM-5 catalyst exhibited ultra-efficient biocatalytic activity for hydrolyzing the beta-glycosidic bonds in the model substrate 4-nitrophenyl beta-D-glucopyranoside, with a broad operating temperature range, high thermal stability, and excellent reusability. The relative activity of pectinase preparation@ZSM-5 at a high temperature (70 degrees C) was nine times higher than that of free pectinase preparation. Using thermal inactivation kinetic analysis based on the Arrhenius law, pectinase preparation@ZSM-5 showed higher activation energy for denaturation (315 kJ mol(-1)) and a longer half-life (62 min(-1)) than free pectinase preparation. Moreover, a Michaelis-Menten enzyme kinetic analysis indicated a higher maximal reaction velocity for pectinase preparation@ZSM-5 (0.22 mu mol mg(-1) min(-1)). This enhanced reactivity was attributed to the microstructure of the immobilized pectinase preparation@ZSM-5, which offered a heterogeneous reaction system that decreased the substrate-pectinase preparation binding affinity and modulated the kinetic characteristics of the enzyme. Additionally, pectinase preparation@ZSM-5 showed the best ethanol tolerance among all the reported pectinase preparation-immobilized catalysts, and an activity 247% higher than that of free pectinase preparation at a 10% (v/v) ethanol concentration was measured. Furthermore, pectinase preparation@ZSM-5 exhibited potential for practical engineering applications, promoting the hydrolysis of beta-glycosidic bonds in baicalin to convert it into baicalein. This was achieved with a 98% conversion rate, i.e., 320% higher than that of the free enzyme.

Place, publisher, year, edition, pages
Frontiers Media SA, 2021
Keywords
immobilization, pectinase, beta-glycosidic bond, ZSM-5 zeolite, heat resistance, ethanol tolerance
National Category
Chemical Process Engineering
Identifiers
urn:nbn:se:kth:diva-301831 (URN)10.3389/fchem.2021.677868 (DOI)000690148600001 ()34458232 (PubMedID)2-s2.0-85113510890 (Scopus ID)
Note

QC 20210915

Available from: 2021-09-15 Created: 2021-09-15 Last updated: 2023-02-01Bibliographically approved
Liu, D., Lv, Z., Dang, J., Ma, W., Jian, K., Wang, M., . . . Tian, W. (2021). Nitrogen-Doped MoS2/Ti3C2TX Heterostructures as Ultra-Efficient Alkaline HER Electrocatalysts. Inorganic Chemistry, 60(13), 9932-9940
Open this publication in new window or tab >>Nitrogen-Doped MoS2/Ti3C2TX Heterostructures as Ultra-Efficient Alkaline HER Electrocatalysts
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2021 (English)In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 60, no 13, p. 9932-9940Article in journal (Refereed) Published
Abstract [en]

Molybdenum disulfide (MoS2) is intrinsically inert for the hydrogen evolution reaction (HER) in alkaline media due to its electronic structures. Herein, we tune the electronic structures of MoS2 by a combined strategy of post-N doping coupled with the synergistic effect of Ti3C2TX. The as-prepared N-doped MoS2/Ti3C2TX heterostructures show remarkable alkaline HER activity with an over-potential of 225 mV at 140 mA cm(-2), which ranks the N-doped MoS2/Ti3C2TX heterostructures among the best MoS2/MXene-based electrocatalysts reported for alkaline HER. The first-principles calculations indicate that the N doping can enhance the activation of nearby S sites of MoS2/Ti3C2TX and thus promote the HER process. This strategy provides a promising way to develop high-efficiency MoS2/MXene heterostructure catalysts for alkaline HER.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2021
National Category
Physical Chemistry
Identifiers
urn:nbn:se:kth:diva-299088 (URN)10.1021/acs.inorgchem.1c01193 (DOI)000671099600067 ()34133160 (PubMedID)2-s2.0-85110231502 (Scopus ID)
Note

QC 20210802

Available from: 2021-08-02 Created: 2021-08-02 Last updated: 2022-12-12Bibliographically approved
Ouyang, L., Buchmann, S., Benselfelt, T., Musumeci, C., Wang, Z., Khaliliazar, S., . . . Hamedi, M. (2021). Rapid prototyping of heterostructured organic microelectronics using wax printing, filtration, and transfer. Journal of Materials Chemistry C, 9(41), 14596-14605
Open this publication in new window or tab >>Rapid prototyping of heterostructured organic microelectronics using wax printing, filtration, and transfer
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2021 (English)In: Journal of Materials Chemistry C, ISSN 2050-7526, E-ISSN 2050-7534, Vol. 9, no 41, p. 14596-14605Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Royal Society of Chemistry (RSC), 2021
National Category
Organic Chemistry Materials Chemistry Polymer Chemistry
Identifiers
urn:nbn:se:kth:diva-307127 (URN)10.1039/d1tc03599a (DOI)000698441100001 ()34765224 (PubMedID)2-s2.0-85118600456 (Scopus ID)
Funder
EU, European Research Council, 715268
Note

QC 20220128

Available from: 2022-01-13 Created: 2022-01-13 Last updated: 2024-03-15Bibliographically approved
Lv, Z., Liu, D., Tian, W. & Dang, J. (2020). Designed synthesis of WC-based nanocomposites as low-cost, efficient and stable electrocatalysts for the hydrogen evolution reaction. CrystEngComm, 22(27), 4580-4590
Open this publication in new window or tab >>Designed synthesis of WC-based nanocomposites as low-cost, efficient and stable electrocatalysts for the hydrogen evolution reaction
2020 (English)In: CrystEngComm, ISSN 1466-8033, E-ISSN 1466-8033, Vol. 22, no 27, p. 4580-4590Article in journal (Refereed) Published
Abstract [en]

It still remains a great challenge to develop alternative electrocatalysts with low cost, high efficiency and good stability for the hydrogen evolution reaction (HER). In this study, effectively conductive rGO (reduced graphene oxide) was used as the support both to promote charge transfer and to refine the particle size of WC, to realize efficient and stable HER performance. The facilein situmethod can make highly dispersed WC nanoparticles firmly anchor onto the rGO substrate. Benefiting from its unique morphology and strong synergistic effect, the designed WC@rGO achieves a giant improvement in HER activity in both acidic and alkaline solutions compared with pristine WC. The overpotentials of WC@rGO are 2.82 and 2.30 times smaller than those of pristine WC to achieve 10 mA cm(-2) in acid and alkaline solutions. More specifically, the Pt-modified WC electrocatalyst with negligible accumulation of Pt (4 wt%) even exhibits superior electrocatalytic performance (eta(10) and Tafel slope of 54 mV and 21 mV dec(-1) in acid solution and 61 mV and 28 mV dec(-1) in alkaline solution) to commercial 10 wt% Pt@C. The method reported in this study enables eco-friendly preparation of cheap, stable and effective HER electrodes.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2020
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-278961 (URN)10.1039/d0ce00419g (DOI)000549313300006 ()2-s2.0-85088249229 (Scopus ID)
Note

QC 20200820

Available from: 2020-08-20 Created: 2020-08-20 Last updated: 2022-12-12Bibliographically approved
Yang, S., Wang, T., Tang, R., Yan, Q., Tian, W. & Zhang, L. (2020). Enhanced permeability, mechanical and antibacterial properties of cellulose acetate ultrafiltration membranes incorporated with lignocellulose nanofibrils. International Journal of Biological Macromolecules, 151, 159-167
Open this publication in new window or tab >>Enhanced permeability, mechanical and antibacterial properties of cellulose acetate ultrafiltration membranes incorporated with lignocellulose nanofibrils
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2020 (English)In: International Journal of Biological Macromolecules, ISSN 0141-8130, E-ISSN 1879-0003, Vol. 151, p. 159-167Article in journal (Refereed) Published
Abstract [en]

Cellulose acetate (CA) ultrafiltration membranes are attracting more attention in wastewater purification due to its biodegradability and eco-friendly. The application of CA membranes, however, is limited by high susceptibility to bacterial corrosion and lack of mechanical tolerance that results in loss of life. To solve the above problems, we first fabricated the CA-based composite membranes incorporated with bamboo-based lignocellulose nanofibrils (LCNFs) by a strategy of phase inversion. LCNFs was prepared by using a combined method of one-step chemical pretreatment and add hydrolysis coupled with high-pressure homogenization. The as-prepared CA/LCNFs composite membranes with 4 wt% lignin in the LCNFs exhibited high tensile strength of 7.08 MPa and strain-at-break of 12.21%, and high filtration permeability of 188.23 L. m(-2).h(-1) as ultrafiltration membranes for wastewater treatment, which could obviously inhibit the growth of Escherichia Coli.

Place, publisher, year, edition, pages
ELSEVIER, 2020
Keywords
Lignocellulose nanofibrils, Cellulose acetate, Permeability, Mechanical property, Antibacterial property
National Category
Chemical Engineering
Identifiers
urn:nbn:se:kth:diva-273489 (URN)10.1016/j.ijbiomac.2020.02.124 (DOI)000528267400015 ()32061851 (PubMedID)2-s2.0-85079900982 (Scopus ID)
Note

QC 20200525

Available from: 2020-05-25 Created: 2020-05-25 Last updated: 2022-12-12Bibliographically approved
Tian, W., Gao, Q., VahidMohammadi, A., Dang, J., Li, Z., Liang, X., . . . Zhang, L. (2020). Liquid-phase exfoliation of layered biochars into multifunctional heteroatom (Fe, N, S) co-doped graphene-like carbon nanosheets. Chemical Engineering Journal, Article ID 127601.
Open this publication in new window or tab >>Liquid-phase exfoliation of layered biochars into multifunctional heteroatom (Fe, N, S) co-doped graphene-like carbon nanosheets
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2020 (English)In: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, article id 127601Article in journal (Refereed) Published
Abstract [en]

We here report a liquid-phase exfoliation strategy to delaminate multilayered biochars into multi-heteroatom (Fe, N, S) co-doped graphene-like carbon nanosheets, in which the multilayered biochars derived from naturally evolved layer-by-layer precursors. This strategy provides the versatile capability to tailor the textural properties of the as-synthesized carbon nanosheets, such as obtaining a controllable specific surface area of up to 2491 m2 g−1. Thanks to the unique integration of graphene-like microstructures with a thickness of 4.3 nm, large specific surface area and hierarchical pores, homogenous co-doping of N, S, and Fe, and high electronic conductivity, the as-synthesized Fe-N-S co-doped carbon nanosheets could act as multifunctional electrodes for electrocatalytic process of oxygen reduction reaction (ORR) and capacitive energy storage. The optimized nanosheets showed a better ORR catalytic performance than commercial Pt/C catalyst, with a more positive onset potential (1.026 V) and half-wave potential (0.829 V), higher long-term stability, and outstanding methanol tolerance in alkaline mediums. Furthermore, the porous carbon nanosheets exhibited excellent supercapacitive performances which delivered a high energy density of 29.1 Wh kg−1 at a high power density of up to 39.5 kW kg−1 in an ionic liquid electrolyte. This liquid-phase exfoliation strategy will offer new inspiration for the synthesis of various biomass-derived graphene-like carbon nanosheets for multifunctional applications.

Place, publisher, year, edition, pages
Elsevier BV, 2020
Keywords
Fe-N-S co-doped carbon nanosheet, Liquid-phase exfoliation, Multilayered biochar, Oxygen reduction reaction, Supercapacitor
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-291702 (URN)10.1016/j.cej.2020.127601 (DOI)000664791100003 ()2-s2.0-85096621424 (Scopus ID)
Note

QC 20210319

Available from: 2021-03-19 Created: 2021-03-19 Last updated: 2022-06-25Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-3497-2054

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