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Publications (10 of 108) Show all publications
Zuo, H., Lyu, B., Yao, J., Long, W., Shi, Y., Li, X., . . . Liao, Y. (2024). Bioinspired Gradient Covalent Organic Framework Membranes for Ultrafast and Asymmetric Solvent Transport. Advanced Materials
Open this publication in new window or tab >>Bioinspired Gradient Covalent Organic Framework Membranes for Ultrafast and Asymmetric Solvent Transport
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2024 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095Article in journal (Refereed) Epub ahead of print
Abstract [en]

Gradients play a pivotal role in membrane technologies, e.g., osmotic energy conversion, desalination, biomimetic actuation, selective separation, and more. In these applications, the compositional gradients are of great relevance for successful function implementation, ranging from solvent separation to smart devices; However, the construction of functional gradient in membranes is still challenging both in scale and directions. Inspired by the specific function-related, graded porous structures in glomerular filtration membranes, a general approach for constructing gradient covalent organic framework membranes (GCOMx) applying poly (ionic liquid)s (PILs) as template is reported here. With graded distribution of highly porous covalent organic framework (COF) crystals along the membrane, GCOMx exhibts an unprecedented asymmetric solvent transport when applying different membrane sides as the solvent feed surface during filtration, leading to a much-enhanced flux (10–18 times) of the “large-to-small” pore flow comparing to the reverse direction, verified by hydromechanical theoretical calculations. Upon systematic experiments, GCOMx achieves superior permeance in nonpolar (hexane ≈260.45 LMH bar−1) and polar (methanol ≈175.93 LMH bar−1) solvents, together with narrow molecular weight cut-off (MWCO, 472 g mol−1) and molecular weight retention onset (MWRO, <182 g mol−1). Interestingly, GCOMx shows significant filtration performance in simulated kidney dialysis, revealing great potential of GCOMx in bionic applications. 

Keywords
asymmetric solvent transport, bioinspired, gradient covalent organic framework membrane
National Category
Other Materials Engineering Materials Chemistry
Identifiers
urn:nbn:se:su:diva-226646 (URN)10.1002/adma.202305755 (DOI)001148829700001 ()38227620 (PubMedID)2-s2.0-85182832481 (Scopus ID)
Available from: 2024-02-15 Created: 2024-02-15 Last updated: 2024-02-15
Héraly, F., Sikdar, A., Chang, J. & Yuan, J. (2024). Capacitive CO2 sensor made of aminated cellulose nanofibrils: development and optimization. New Journal of Chemistry, 48(14), 6064-6070
Open this publication in new window or tab >>Capacitive CO2 sensor made of aminated cellulose nanofibrils: development and optimization
2024 (English)In: New Journal of Chemistry, ISSN 1144-0546, E-ISSN 1369-9261, Vol. 48, no 14, p. 6064-6070Article in journal (Refereed) Published
Abstract [en]

CO2 sensors are very important; however, their performance is limited by stability and selectivity. This study unveils a capacitive CO2 sensor with a dielectric layer comprised of amine-functionalized cellulose nanofibril (CNF) foam, significantly enhanced by the addition of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU). The core innovation of this research lies in the strategic use of CNF-based foam, which leads to a substantial increase in sensor capacitance, setting a new standard in CO2 monitoring technologies. The sensor showcases exceptional performance under ambient conditions, with marked improvements in sensitivity towards CO2. The advancements are attributed to the chemisorption properties of the aminated CNFs combined with the DBU enhancement, facilitating more effective CO2 capture. By integrating these materials, we present a sensor that opens new avenues for environmental monitoring, healthcare diagnostics, and industrial safety, establishing a new benchmark for capacitive CO2 sensors in efficiency and environmental sustainability.

National Category
Inorganic Chemistry
Identifiers
urn:nbn:se:su:diva-228125 (URN)10.1039/d4nj00508b (DOI)001186236700001 ()2-s2.0-85188120229 (Scopus ID)
Available from: 2024-04-10 Created: 2024-04-10 Last updated: 2024-04-10Bibliographically approved
Zhou, X., Shen, B., Zhai, J., Yuan, J. & Hedin, N. (2024). Enhanced Generation of Reactive Oxygen Species via Piezoelectrics based on p–n Heterojunctions with Built-In Electric Field. ACS Applied Materials and Interfaces, 16(16), 20472-20484
Open this publication in new window or tab >>Enhanced Generation of Reactive Oxygen Species via Piezoelectrics based on p–n Heterojunctions with Built-In Electric Field
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2024 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 16, no 16, p. 20472-20484Article in journal (Refereed) Published
Abstract [en]

Tuning the charge transfer processes through a built-in electric field is an effective way to accelerate the dynamics of electro- and photocatalytic reactions. However, the coupling of the built-in electric field of p–n heterojunctions and the microstrain-induced polarization on the impact of piezocatalysis has not been fully explored. Herein, we demonstrate the role of the built-in electric field of p-type BiOI/n-type BiVO4 heterojunctions in enhancing their piezocatalytic behaviors. The highly crystalline p–n heterojunction is synthesized by using a coprecipitation method under ambient aqueous conditions. Under ultrasonic irradiation in water exposed to air, the p–n heterojunctions exhibit significantly higher production rates of reactive species (·OH, ·O2, and 1O2) as compared to isolated BiVO4 and BiOI. Also, the piezocatalytic rate of H2O2 production with the BiOI/BiVO4 heterojunction reaches 480 μmol g–1 h–1, which is 1.6- and 12-fold higher than those of BiVO4 and BiOI, respectively. Furthermore, the p–n heterojunction maintains a highly stable H2O2 production rate under ultrasonic irradiation for up to 5 h. The results from the experiments and equation-driven simulations of the strain and piezoelectric potential distributions indicate that the piezocatalytic reactivity of the p–n heterojunction resulted from the polarization intensity induced by periodic ultrasound, which is enhanced by the built-in electric field of the p–n heterojunctions. This study provides new insights into the design of piezocatalysts and opens up new prospects for applications in medicine, environmental remediation, and sonochemical sensors. 

Keywords
built-in electric field, p−n heterojunction, piezocatalysis, polarization, piezoelectric potential
National Category
Materials Chemistry Chemical Process Engineering
Identifiers
urn:nbn:se:su:diva-228700 (URN)10.1021/acsami.4c01283 (DOI)001200251700001 ()38595048 (PubMedID)2-s2.0-85190145708 (Scopus ID)
Available from: 2024-04-29 Created: 2024-04-29 Last updated: 2024-04-29Bibliographically approved
Sikdar, A., Héraly, F., Zhang, H., Hall, S., Pang, K., Zhang, M. & Yuan, J. (2024). Hierarchically Porous 3D Freestanding Holey-MXene Framework via Mild Oxidation of Self-Assembled MXene Hydrogel for Ultrafast Pseudocapacitive Energy Storage. ACS Nano, 18(4), 3707-3719
Open this publication in new window or tab >>Hierarchically Porous 3D Freestanding Holey-MXene Framework via Mild Oxidation of Self-Assembled MXene Hydrogel for Ultrafast Pseudocapacitive Energy Storage
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2024 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 18, no 4, p. 3707-3719Article in journal (Refereed) Published
Abstract [en]

The true promise of MXene as a practical supercapacitor electrode hinges on the simultaneous advancement of its three-dimensional (3D) assembly and the engineering of its nanoscopic architecture, two critical factors for facilitating mass transport and enhancing an electrode’s charge-storage performance. Herein, we present a straightforward strategy to engineer robust 3D freestanding MXene (Ti3C2Tx) hydrogels with hierarchically porous structures. The tetraamminezinc(II) complex cation ([Zn(NH3)4]2+) is selected to electrostatically assemble colloidal MXene nanosheets into a 3D interconnected hydrogel framework, followed by a mild oxidative acid-etching process to create nanoholes on the MXene surface. These hierarchically porous, conductive holey-MXene frameworks facilitate 3D transport of both electrons and electrolyte ions to deliver an excellent specific capacitance of 359.2 F g–1 at 10 mV s–1 and superb capacitance retention of 79% at 5000 mV s–1, representing a 42.2% and 15.3% improvement over pristine MXene hydrogel, respectively. Even at a commercial-standard mass loading of 10.1 mg cm–2, it maintains an impressive capacitance retention of 52% at 1000 mV s–1. This rational design of an electrode by engineering nanoholes on MXene nanosheets within a 3D porous framework dictates a significant step forward toward the practical use of MXene and other 2D materials in electrochemical energy storage systems. 

Keywords
self-assembly, 2D materials, holey-MXene, freestanding hydrogel, pseudocapacitor
National Category
Materials Chemistry
Identifiers
urn:nbn:se:su:diva-225685 (URN)10.1021/acsnano.3c11551 (DOI)001154866800001 ()38230678 (PubMedID)2-s2.0-85183528105 (Scopus ID)
Funder
Swedish Research Council, 2021-05839Swedish Research Council, 201805351Knut and Alice Wallenberg Foundation, KAW 2017.0166
Available from: 2024-01-19 Created: 2024-01-19 Last updated: 2024-02-19Bibliographically approved
Lin, X., Guo, Z., Wu, Y., Yuan, J., Liao, Y. & Zhang, W. (2024). Ionic Conjugated Microporous Polymers for Cycloaddition of Carbon Dioxide to Epoxides. Macromolecular materials and engineering, 309(2), Article ID 2300218.
Open this publication in new window or tab >>Ionic Conjugated Microporous Polymers for Cycloaddition of Carbon Dioxide to Epoxides
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2024 (English)In: Macromolecular materials and engineering, ISSN 1438-7492, E-ISSN 1439-2054, Vol. 309, no 2, article id 2300218Article in journal (Refereed) Published
Abstract [en]

Along the development of ionic porous organic polymers, simple and efficient synthetic methods are actively pursued. Herein, the Debus–Radziszewski reaction is applied to synthesize ionic conjugated microporous polymers (iCMPs) in one step. A series of imidazolium-linked iCMP-X (X = 1, 2, 3) are developed for CO2 sorption and in situ conversion with epoxide into cyclic carbonates. The as-synthesized iCMPs are characterized in detail by scanning electron microscope, solid-state nuclear magnetic resonance, X-ray photoelectron spectroscopy, X-ray diffraction analysis, N2/CO2 sorption, and more. Among all synthesized iCMPs, iCMP-1 possesses the highest specific surface area and in turn the strongest CO2 sorption capacity. Moreover, through a simple anion ion exchange reaction with halide, iCMP-1 is transformed to iCMP-1@Cl that embodies significant catalytic capability for converting CO2 into cyclic carbonates. 

Keywords
carbon dioxide, Debus-Radziszewski reaction, epoxy compounds, heterogeneous catalysts, ionic conjugated microporous polymers
National Category
Chemical Process Engineering
Identifiers
urn:nbn:se:su:diva-224621 (URN)10.1002/mame.202300218 (DOI)001108865700001 ()2-s2.0-85178139578 (Scopus ID)
Available from: 2023-12-20 Created: 2023-12-20 Last updated: 2024-03-05Bibliographically approved
Chang, J., Pang, B., Zhang, H., Pang, K., Zhang, M. & Yuan, J. (2024). MXene/Cellulose Composite Cloth for Integrated Functions (if-Cloth) in Personal Heating and Steam Generation. Advanced fiber materials, 6(1), 252-263
Open this publication in new window or tab >>MXene/Cellulose Composite Cloth for Integrated Functions (if-Cloth) in Personal Heating and Steam Generation
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2024 (English)In: Advanced fiber materials, ISSN 2524-7921, Vol. 6, no 1, p. 252-263Article in journal (Refereed) Published
Abstract [en]

Given the abundant solar light available on our planet, it is promising to develop an advanced fabric capable of simultaneously providing personal thermal management and facilitating clean water production in an energy-efficient manner. In this study, we present the fabrication of a photothermally active, biodegradable composite cloth composed of titanium carbide MXene and cellulose, achieved through an electrospinning method. This composite cloth exhibits favorable attributes, including chemical stability, mechanical performance, structural flexibility, and wettability. Notably, our 0.1-mm-thick composite cloth (RC/MXene IV) raises the temperature of simulated skin by 5.6 degrees C when compared to a commercially available cotton cloth, which is five times thicker under identical ambient conditions. Remarkably, the composite cloth (RC/MXene V) demonstrates heightened solar light capture efficiency (87.7%) when in a wet state instead of a dry state. Consequently, this cloth functions exceptionally well as a high-performance steam generator, boasting a superior water evaporation rate of 1.34 kg m(-2) h(-1) under one-sun irradiation (equivalent to 1000 W m(-2)). Moreover, it maintains its performance excellence in solar desalination processes. The multifunctionality of these cloths opens doors to a diverse array of outdoor applications, including solar-driven water evaporation and personal heating, thereby enriching the scope of integrated functionalities for textiles.

Keywords
Composite cloth, Solar heating, Personal heating, Steam generation
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:su:diva-225429 (URN)10.1007/s42765-023-00345-w (DOI)001130166900001 ()2-s2.0-85180180094 (Scopus ID)
Available from: 2024-01-17 Created: 2024-01-17 Last updated: 2024-04-29Bibliographically approved
Yang, C., Wang, K., Lyu, W., Liu, H., Li, J., Wang, Y., . . . Liao, Y. (2024). Nanofibrous Porous Organic Polymers and Their Derivatives: From Synthesis to Applications. Advanced Science
Open this publication in new window or tab >>Nanofibrous Porous Organic Polymers and Their Derivatives: From Synthesis to Applications
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2024 (English)In: Advanced Science, E-ISSN 2198-3844Article, review/survey (Refereed) Epub ahead of print
Abstract [en]

Engineering porous organic polymers (POPs) into 1D morphology holds significant promise for diverse applications due to their exceptional processability and increased surface contact for enhanced interactions with guest molecules. This article reviews the latest developments in nanofibrous POPs and their derivatives, encompassing porous organic polymer nanofibers, their composites, and POPs-derived carbon nanofibers. The review delves into the design and fabrication strategies, elucidates the formation mechanisms, explores their functional attributes, and highlights promising applications. The first section systematically outlines two primary fabrication approaches of nanofibrous POPs, i.e., direct bulk synthesis and electrospinning technology. Both routes are discussed and compared in terms of template utilization and post-treatments. Next, performance of nanofibrous POPs and their derivatives are reviewed for applications including water treatment, water/oil separation, gas adsorption, energy storage, heterogeneous catalysis, microwave absorption, and biomedical systems. Finally, highlighting existent challenges and offering future prospects of nanofibrous POPs and their derivatives are concluded.

Keywords
applications, bulk synthesis, electrospinning, nanofibers, porous organic polymers
National Category
Polymer Chemistry Polymer Technologies
Identifiers
urn:nbn:se:su:diva-228143 (URN)10.1002/advs.202400626 (DOI)001183659500001 ()38476058 (PubMedID)2-s2.0-85187524961 (Scopus ID)
Available from: 2024-04-10 Created: 2024-04-10 Last updated: 2024-04-10
Saeedi Garakani, S., Sikdar, A., Pang, K. & Yuan, J. (2024). Poly(ionic liquid)-derived metal-free heteroatom co-doped porous carbons with peroxidase-like activity. Applied Materials Today, 37, Article ID 102081.
Open this publication in new window or tab >>Poly(ionic liquid)-derived metal-free heteroatom co-doped porous carbons with peroxidase-like activity
2024 (English)In: Applied Materials Today, ISSN 2352-9407, Vol. 37, article id 102081Article in journal (Refereed) Published
Abstract [en]

Development of affordable, efficient and metal-free heterogeneous catalytic systems has been a persistent challenge in academia and industry. Heteroatom-doped metal-free carbon materials are increasingly recognized as valuable heterogeneous catalysts, and if well-designed, can present comparable performance to, or even surpass transition metal-containing catalysts. Their physicochemical properties and structural characteristics are tunable in a wide range, plus being free of leakage problems of transition metal species into the environment. Herein, three types of hierarchically porous N/X co-doped carbon materials (X denotes B, P or S) were synthesized via using poly(ionic liquid)s (PILs) as carbon precursors and source of heteroatom dopants. The incorporation of sacrificial pore-inducing templating agents which created abundant edge defects, in combination with a heteroatom co-doping strategy, enhanced the number of active sites and their peroxidase-like catalytic activities. Comparison with only nitrogen single-doped porous carbons as reference demonstrated that co-doping with nitrogen and another heteroatom exhibits higher peroxidase-like activity and affinity towards substrates. Among the three types of heteroatom co-doped porous carbonaceous artificial enzymes, the N/B co-doped carbonaceous catalyst displayed the highest specific activities and Vmax values. These observations suggest a synergistic effect of the co-dopants, here N and B in the enzyme that holds a promising potential to further enhance peroxidase-like activity.

Keywords
Heteroatom co-doped carbon, Metal-free carbonaceous catalyst, Poly(ionic liquid)-derived carbon, Artificial enzyme, Peroxidase-like activity
National Category
Materials Chemistry Organic Chemistry
Identifiers
urn:nbn:se:su:diva-228193 (URN)10.1016/j.apmt.2024.102081 (DOI)001176572300001 ()2-s2.0-85184007619 (Scopus ID)
Available from: 2024-04-10 Created: 2024-04-10 Last updated: 2024-04-10Bibliographically approved
Pang, K., Tang, Y., Qiu, C., Zhang, M., Tayal, A., Feng, S., . . . Yuan, J. (2024). Redirecting configuration of atomically dispersed selenium catalytic sites for efficient hydrazine oxidation. Matter, 7(2), 655-667
Open this publication in new window or tab >>Redirecting configuration of atomically dispersed selenium catalytic sites for efficient hydrazine oxidation
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2024 (English)In: Matter, ISSN 2590-2393, E-ISSN 2590-2385, Vol. 7, no 2, p. 655-667Article in journal (Refereed) Published
Abstract [en]

Understanding the reconstruction of surface sites is crucial for gaining insights into the true active sites and catalytic mechanisms. While extensive research has been conducted on reconstruction behaviors of atomically dispersed metallic catalytic sites, limited attention has been paid to non-metallic ones despite their potential catalytic activity comparable or even superior to their noble-metal counterpart. Herein, we report a carbonaceous, atomically dispersed non-metallic selenium catalyst that displayed exceptional catalytic activity in the hydrazine oxidation reaction (HzOR) in alkaline media, outperforming the noble-metal Pt catalysts. In situ X-ray absorption spectroscopy (XAS) and Fourier transform infrared spectroscopy revealed that the pristine SeC4 site pre-adsorbs an ∗OH ligand, followed by HzOR occurring on the other side of the OH–SeC4. Theoretical calculations proposed that the pre-adsorbed ∗OH group pulls electrons from the Se site, resulting in a more positively charged Se and a higher polarity of Se–C bonds, thereby enhancing surface reactivity toward HzO/R.

National Category
Materials Chemistry
Research subject
Materials Science
Identifiers
urn:nbn:se:su:diva-225579 (URN)10.1016/j.matt.2023.12.001 (DOI)001182393300001 ()2-s2.0-85184059651 (Scopus ID)
Available from: 2024-01-17 Created: 2024-01-17 Last updated: 2024-03-26Bibliographically approved
Yang, S., Gao, Z., Hu, Z., Pan, C., Yuan, J., Tam, K. C., . . . Tang, J. (2024). Regulating the Tautomerization in Covalent Organic Frameworks for Efficient Sacrificial Agent-Free Photocatalytic H2O2 Production. Macromolecules, 57(5), 2039-2047
Open this publication in new window or tab >>Regulating the Tautomerization in Covalent Organic Frameworks for Efficient Sacrificial Agent-Free Photocatalytic H2O2 Production
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2024 (English)In: Macromolecules, ISSN 0024-9297, E-ISSN 1520-5835, Vol. 57, no 5, p. 2039-2047Article in journal (Refereed) Published
Abstract [en]

The efficiency of photocatalytic production of H2O2 is constrained by the low selectivity toward oxygen reduction, and the active sites are still under debate. Herein, analogous covalent organic framework photocatalysts were synthesized from triformylphloroglucinol (Tp) and predesigned diamines, in which a molecular engineering strategy was employed to manipulate the energy barrier for the targeted proton transfers. The tautomerization of enol-imine to keto-enamine introduced abundant alkene bonds (C═C), which serve as the primary adsorption sites and have a lower energy barrier for the reduction of the O2 reduction. DHAA-Tp COF displayed a remarkable photocatalytic H2O2 production rate of 219.5 μmol h–1 g–1 without any sacrificial reagent, which stands out among the structure-related materials. A switch from a concerted one-step 2e to a two-step single e process in O2 reduction was observed in TCNAQ-Tp COF, which is presumably ascribed to the suppressed tautomerization mediated by the strong electron-withdrawing cyano groups. The results demonstrate a novel concept for the photocatalytic production of H2O2 using an efficient, stable, and recyclable metal-free photocatalytic system. 

National Category
Materials Chemistry
Identifiers
urn:nbn:se:su:diva-227311 (URN)10.1021/acs.macromol.3c01634 (DOI)001173659500001 ()2-s2.0-85186095791 (Scopus ID)
Available from: 2024-03-19 Created: 2024-03-19 Last updated: 2024-03-19Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0003-1016-5135

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