Journal of Physical Chemistry C
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2024
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IF 3.3
Jiao Wu,Jingxuan Cui,Aihu Feng,Kun Liu,Yun Yu
Introducing “spacer” materials into Ti3C2Tx layers is a powerful approach to reduce layer stacking and enhance the utilization of active sites in capacitive deionization (CDI). In this research, porous carbon spheres derived from polymethacrylates (PMMA) act as the “spacer” material, and the Ti3C2Tx/C composite is prepared through a straightforward technique of mixing followed by annealing. Through the cooperative effect of the “separation” of Ti3C2Tx nanosheets and the porous nature of the carbon spheres, Ti3C2Tx/C has a large specific surface area of 96.01 m2 g–1, a pore volume of 0.2306 cm3 g–1, and a well-developed mesoporous structure. Benefiting from the increased adsorption sites coupled with lower migration resistance, Ti3C2Tx/C achieves an ion adsorption capacity of 24.29 mg g–1 and ion adsorption rate of 0.0485 mg g–1 s–1 in 1000 μS cm–1 NaCl solution at 1.2 V, reflecting an increase of 76 and 166%, respectively, compared to m-Ti3C2Tx (13.8 mg g–1 and 0.0485 mg g–1 s–1). Besides, it is established that the ion adsorption process of Ti3C2Tx/C is more accurately described by the second-order kinetic module.
研究领域:
材料科学
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环境工程
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高影响因子
Journal of Energy Chemistry
·
2019
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IF 5.162
Xin Liang,Jufeng Yun,Kun Xu,Hongfa Xiang,Yong Wang,Yi Sun,Yan Yu
Lithium-sulfur (Li-S) batteries with lithium sulfide (Li 2 S) as cathode have attracted great attention recently, because of high specific capacity (1166 mA h g −1 ) of Li 2 S and potential safety of using Li metal-free anode. Li 2 S cathode has lower volume expansion and higher thermal stability than the traditional sulfur cathode. However, the problems of “shuttle effect” and poor electrical conductivity of the cathode material still need to be overcome. In this work, multi-layered Ti 3 C 2 /Li 2 S (ML-Ti 3 C 2 /Li 2 S) composite has been prepared and applied as a cathode in advanced Li-S batteries. The unique multi-layer sheet structure of Ti 3 C 2 provides space for the storage of Li 2 S, and its good conductivity greatly enhances the usage ratio of Li 2 S and improves the conductivity of the whole Li 2 S cathode. Compared with commonly used graphene, ML-Ti 3 C 2 can trap polysulfides effectively by chemical adsorption and also activate the reaction of Li 2 S to polysulfides by forming Ti-S bond. As a result, during the cycling of the batteries with ML-Ti 3 C 2 /Li 2 S cathodes, the activation voltage barrier of the first cycle has decreased to 2.8 V, and the “shuttle effect” has been suppressed effectively. The cycling and rate performances of the ML-Ti 3 C 2 /Li 2 S cathodes have been significantly improved compared to that of graphene/Li 2 S cathodes. They maintain a capacity of 450 mA h g −1 at 0.2 C after 100 cycles, and deliver attractive rate performances of 750, 630, 540, 470 and 360 mA h g −1 at 0.1 C, 0.2 C, 0.5 C, 1 C, and 2 C, respectively.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
Nano Today
·
2024
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IF 13.2
Cong Wang,Chaofeng Wang,Shuilin Wu,Zhenduo Cui,Yufeng Zheng,Zhaoyang Li,Hui Jiang,Yu Zhang,Paul K. Chu,Shengli Zhu,Xiangmei Liu
Deep-seated osteomyelitis caused by bacterial infection, particularly methicillin-resistant Staphylococcus aureus (MRSA) infection, poses a significant challenge to treatment. In this study, we propose the utilization of a composite microwave (MW)-responsive polypyrrole-modified titanium carbide/zinc oxide (Ti 3 C 2 T x /ZnO–PPy) heterostructure as a potential therapeutic option for MRSA-infected osteomyelitis. In vitro and in vivo experiments show that Ti 3 C 2 T x /ZnO–PPy can effectively treat MRSA-induced osteomyelitis under MW irradiation, which is attributed to the enhanced in situ release of MW heat and reactive oxygen species (ROS). Density functional theory and MW network vector analysis further reveal that under MW irradiation, Ti 3 C 2 T x /ZnO–PPy generates free electrons that move freely within the heterogeneous interface formed by Ti 3 C 2 T x and ZnO, thereby enhancing the accumulation of charges. These charges combine with adsorbed oxygen at the interface to produce ROS. Furthermore, augmented dipole polarization induced by the functional groups on the surface of Ti 3 C 2 T x and the interfacial polarization between Ti 3 C 2 T x and ZnO contribute to good impedance matching and a favourable attenuation constant in the Ti 3 C 2 T x /ZnO–PPy composite, resulting in superior MW thermal properties. Moreover, the polypyrrole-modified composite shows excellent biocompatibility. This efficient antimicrobial system with MW irradiation is expected to offer a viable approach to the management of osteomyelitis.
研究领域:
微生物学
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材料科学
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医学
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DOI
高影响因子
CARBON
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2022
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IF 11.307
Yong-Sheng Fang,Jie Yuan,Ting-Ting Liu,Qiang-Qiang Wang,Wen-Qiang Cao,Mao-Sheng Cao
High-performance multifunctional electromagnetic (EM) materials exhibit great potential for development, and have attracted extensive attention from the scientific field. Generally, the dielectric "genes", including conductive networks, interfaces, and defects, are the pivotal factors that determine their performance. Herein, multifunctional Ti 3 C 2 T x @polyaniline decorated MWCNT (TPMC) nanocomposites , containing generous dielectric "genes", were synthesized via the electrostatic self-assembly method. Thanks to the regulation of internal dielectric "genes", TPMC exhibited a tunable EM wave absorption (EMA) and EM interference (EMI) shielding performance. TPMC achieved a maximum reflection loss (RL) of −54.7 dB and an effective absorption bandwidth (EAB) of nearly 6 GHz at 1.5 mm. Moreover, the complete conductive networks endowed TPMC with a reliable EMI shielding capability. It exhibited a maximum EMI shielding effectiveness (SE) of 34 dB, and meanwhile, displayed an absorption-dominated green shielding performance. Furthermore, owing to the integration of the "genes", TPMC showed a high coulomb efficiency (∼98%) and excellent cycling stability (exceeded 95% retation after 8000 cycles), indicating a great potential as outstanding supercapacitor electrode material. This work provides a promising strategy for controlling the EM pollution and alleviating the energy issues.
研究领域:
材料科学
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电子工程
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高影响因子
RSC Advances
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2017
·Vol. 7
·期 21
·12856-12870
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IF 3.108
Yan Jiang,Zheng Jin,Chen Chen,Wubiao Duan,Bo Liu,Xidong Chen,Feihua Yang,Jianping Guo
SiO2/P25 (SP) composites doped with different contents of cerium were prepared by a hydrothermal process at a relatively low temperature in this experiment. The resulting Ce–SiO2/P25 (CSP) composites were successfully characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), N2-physisorption, UV-vis diffuse reflectance spectroscopy (DRS), and photoluminescence spectroscopy (PL). The photocatalytic activities of the as-obtained catalysts were evaluated for the degradation of organic dyes, including Methylene Blue (MB) and Reactive Red 4 (RR4), under visible-light irradiation. The best results were obtained for a cerium loading of 5 mM. The CSP-5 nanoparticle showed the 91.8% decomposition of MB and 90.2% decomposition of RR4 in the liquid phase at room temperature under visible-light irradiation in a photoreactor, and the corresponding hydrogen evolution rate was 2.315 mmol g−1, which was more efficient than that of pristine P25. Remarkably enhanced activities towards the photodecomposition of several organic compounds were observed depending on the synergistic effect between silicon and cerium. The Ce–SiO2/P25 structure leads to efficient light harvesting into the visible-light region by forming new energy levels inside the nanoparticles and then electron–hole recombination could be effectively inhibited. The BET surface area measurement was used to provide an insight into the enhanced photocatalytic activity of the CSP composites, which was also understood to be because of the relative enhancement of the adsorption of organic molecules on the photocatalyst surface. In addition, the effect of the initial pH values on the photocatalytic degradation of different dyes using CSP-5 was investigated. Finally, a good recyclability of CSP-5 was demonstrated compared to that of pristine P25. Herein, the photocatalytic mechanism has been concretely explained.
研究领域:
材料科学
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环境化学
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光催化
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纳米材料
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能源材料
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2018
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IF 3.849
Noor Ahmed Nahyoon,Lifen Liu,Kané Rabé,Sarwan Ahmed Nahyoon,Azmat Hussain Abro,Fenglin Yang
In this study, a novel heterojunction silver phosphate-iron-graphene oxide -titanium phosphate (Ag 3 PO 4 /Fe/GTiP) composite was fabricated by the simple chemical process. The prepared composite was characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible spectroscopy (UV-vis), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), and electrochemical impedance spectroscopy (EIS). This catalyst was used as anode material in photocatalytic fuel cell (PFC) with cathode catalyst ZnIn 2 S 4 for efficient degradation of rhodamine B (RhB) with sustainable electricity generation. In PFC the degradation of 90% RhB (10 mg/l) with electricity generation of 0.18 V during 70 min was achieved at pH-3 of 0.05 M Na 2 SO 4 electrolyte. By increasing the RhB concentration up to 100 mg/l the electricity generation was increased up to 0.55 V. Under pure photocatalysis degraded 92.14% RhB (10 mg/l) with Ag 3 PO 4 /Fe/GTiP in 90 min. The discoloration efficiency and electricity generation are influenced by factors such as pH, external resistance, dye concentration, and aeration rate in the PFC. After four cycles of reuse, there was no decrease in PFC performance, which proves its positivity for sustainable energy generation as a greener technology.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
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