Nano Today
·
2024
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IF 13.2
Yuan Yu,Menggang Li,Miao Sun,Zhaolin Yang,Yifan Liu,Senwei Hu,Jiazuo Zhou,Yudong Li,Haiyue Yang,Chengyu Wang
The exceptional potential of MXene aerogels for practical applications is impeded by the energy-intensive processing and insufficient mechanical stability. Inspired by natural bones, herein, we report the MXene@regenerated nanocellulose aerogel (MRCA) with strong mechanical performance via dual aerogel fabrication to achieve high-performance energy generation and storage. The MRCA achieves a gravimetric capacitance of 1271.16 F g −1 at 2 mA cm −2 , and the energy density of the eco-friendly symmetrical MRCA-based solid-state supercapacitor reaches 0.11 mWh cm −2 , positioning it as a top contender among most state-of-the-art MXene-based electrodes. Additionally, the MRCA exhibits a robust specific tensile strength of 68.35 MPa cm 3 g −1 , resembling bone-like resilience. Therefore, MRCA can swiftly generate an open-circuit voltage of 181.24 V. The instant high voltage of MRCA transforms into diverse signals, driving MRCA-SC to release energy for electric devices in practical scenarios, paving the way for future sustainable power systems.
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Nano Energy
·
2024
·
IF 16.8
Zhong Xu,Haichao Huang,Qi Tang,Hongzhi Peng,Junfeng Huang,Hanyu He,Haitao Zhang,Weiqing Yang
Solid-state polymer electrolytes (SPEs) possess conspicuous merits of facile manufacturing, superior mechanical toughness, and favorable chemical stability with Li anodes, but the intrinsically low room temperature ionic conductivity (∼10 −8 −10 −6 S cm −1 ) and negligible Lithium-ion transfer number (0.1–0.2) badly inhibited its commercial application in lithium metal batteries (LMBs). Herein, we design the three-dimensionally and coaxially MXene-confined solid-state polymer electrolyte (C-MX SPE) for the directional acceleration movement of Li + ion by introducing MXene nanosheets into the polyacrylonitrile (PAN) fiber. Benefiting from the confinement effect , the homogeneously and coaxially MXene-confined SPE possess an impressive Li + ion transference number of 0.72 and ionic conductivity of 3.07 × 10 −3 S cm −1 at room temperature, which are 3 and 20 times of magnitude higher than the randomly MXene-dispersed (R-MX) SPE (0.22 and 1.61 ×10 −4 S cm −1 ), respectively. Also, the Lithium/SPE/Lithium symmetric cell exhibits a flat galvanostatic charge/discharge under 1 mA cm −2 for 2000 h without dendrites, revealing its 3D skeleton structure could mechanically suppress Li dendrite growth. Based on it, the assembled flexible solid-state lithium metal batteries (SSLMBs) possess a rate-capability of 101 mAh g −1 @ 10 C, a capacity retention of 85.18% after 500 cycles @ 1 C at room temperature and a stability of bending-needling-cutting performance. Evidently, this three-dimensionally and coaxially MXene-confined SPE may represent a promising strategy to address the random distribution and agglomeration of inorganic fillers in SPE and guide a direction for the development of high-performance, secure, and flexible SSLMBs.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yousen Wu,Ying Wang,Guozhe Sui,Dongxuan Guo,Dawei Chu,Guang Xu,Jinlong Li,Yue Li,Dong-Feng Chai
Nowadays, the inherent re-stacking nature and weak d-p hybridization orbital interactions within MXene remains significant challenges in the field of electrocatalytic water splitting, leading to unsatisfactory electrocatalytic activity and cycling stability. Herein, this work aims to address these challenges and improve electrocatalytic performance by utilizing cobalt nanoparticles intercalation coupled with enhanced π-donation effect. Specifically, cobalt nanoparticles are integrated into V 2 C MXene nanosheets to mitigate the re-stacking issue. Meanwhile, a notable charge redistribution from cobalt to vanadium elevates orbital levels, reduces π*-antibonding orbital occupancy and alleviates Jahn-Teller distortion. Doping with tellurium induces localized electric field rearrangement resulting from the changes in electron cloud density. As a result, Co-V 2 C MXene-Te acquires desirable activity for hydrogen evolution reaction and oxygen evolution reaction with the overpotential of 80.8 mV and 287.7 mV, respectively, at the current density of −10 mA cm −2 and 10 mA cm −2 . The overall water splitting device achieves an impressive low cell voltage requirement of 1.51 V to obtain 10 mA cm −2 . Overall, this work could offer a promising solution when facing the re-stacking issue and weak d-p hybridization orbital interactions of MXene, furnishing a high-performance electrocatalyst with favorable electrocatalytic activity and cycling stability.
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TOPICS IN CATALYSIS
·
2024
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IF 2.8
Mi Xionghui,Wang Pingxia,Rokni Hassan
A new ZnO/MXene material was made using a simple hydrothermal method and heat treatment for measuring glucose without enzymes in sports drinks and human blood samples. The best ZnO/MXene-300 material, made at 150 °C and heated at 300 °C, had a large surface area of 152 m2/g, high current density of 1.12 mA/cm2, and low activation energy of 32.6 kJ/mol for glucose oxidation. The sensor could measure a wide range of glucose levels (0.01-12 mM) with a low detection limit (0.005 µM), worked well in the presence of other substances, remained stable (93.6% after 7 days), and gave consistent results (RSD of 3.2%). The material was tested by measuring glucose in sports drinks and blood samples, with measured values close to the actual values (96.4–104.5%) and high precision (RSDs of 2.8% and 3.8%). These results show that ZnO/MXene materials are promising for making sensitive and stable glucose sensors that don’t need enzymes.
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TRIBOLOGY INTERNATIONAL
·
2024
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IF 6.1
Jiayuan Yan,Yanming Wang,Fengli Liu,Xiaoliang Zhang,Yongxing Liu,Wangfei Shen,Zhixiao Zhang,Ping Li,Yafeng Wang,Chunxia Wu
At the nanoscale, the surface properties of nanomaterials are of utmost importance. Amino-functionalized MXene (AMXene) was prepared by grafting 3-aminopropyltriethoxysilane (APTES) upon the top layer of Ti 3 C 2 T x . AMXene is introduced into the polyimide (PI) matrix coatings. The findings indicate that the dispersion of AMXene in PI is further substantially enhanced based on the principle of “similar compatibility”, which is attributable to the creation of more hydrogen bonds between AMXene and highly polar PI matrix molecular chains. The addition of AMXene lowered the factor of friction by 34.1 % and the rate of abrasion by 84.8 % compared to unadulterated PI. In addition, the PI/AMXene composites exhibit significant reinforcement properties at different loads and speeds.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yanan Liu,Han Zhang,Dahai Zhu,Jinping Duan,Andere Clement Miruka,Li Tang,Pan Li,Li Cai
Photocatalysis and peroxydisulfate (PS) based advanced oxidation techniques are promising technologies in the field of water treatment that can be used to destroy increasingly persistent organic contaminants. The current work used a simple hydrothermal approach to synthesize a catalyst made of composites of TiO 2 nanospheres and multi-layer Ti 3 C 2 T x sheets (TiO 2 @MXene). Tetracycline (TC) was then effectively degraded by the TiO 2 @MXene material integrated with PS activation (300 mg/L). Under simulated sunlight (AM 1.5G, P = 2.8 W) irradiation, the combination method dramatically increases TC degradation. Following a 30-min treatment with 300 mg/L TiO 2 @MXene (wt.10 %), the optimal efficiency can reach 100 %. As the reactive functional species, holes (h + ), SO 4 - •, •OH, and •O 2 − dominate the catalytic process. Furthermore, investigation was conducted into significant factors such as catalyst dosage, PS dosage, common anions, and TiO 2 loading dosage. The TiO 2 @MXene material was demonstrated to be a feasible and sustainable strategy worth taking into consideration in the mitigation of emerging water contaminants due to its ease of recovery, stability of surface properties, and recyclability. Furthermore, the proposed degradation mechanism further demonstrated the viability of TiO 2 @MXene with PS in TC degradation. This, this study provides insights into the design of effective photocatalyst coupling PS activation for the efficient degradation of organic pollutants.
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npj Clean Water
·
2024
·Vol. 7
·期 1
·1-10
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IF 10.4
Shu Dawu,Zhang Xinqi,Han Bo,Li Wanxin,Wang Bingxin,Xu Chengshu
Cobalt-based catalysts were synthesized using the molten metal salt method and applied for the degradation of reactive dyeing wastewater. The results demonstrated a degradation of 97.1% for the C.I. Reactive Red 195 solution under the following conditions: 1.0 g/L of Co@MXene, 3 g/L of peroxymonosulfate (PMS), treated at 25 o C for 36 min with initial pH of 7. After adding 20 g/L of NaCl, the dye degradation rate increased to 5.57 times compared to the original rate 0.0894 min −1 , but the difference in final degradation was not significant. The enhanced degradation was attributed to the combined action of hydroxyl radicals (•OH), sulfate radicals (SO 4 •− ), and singlet oxygen ( 1 O 2 ). Notably, the Co@MXene catalyst maintained a high dye degradation percentage of 93.5% even after being recycled ten times. The treated dye residue can be recycled for dyeing cotton fabrics with reactive dyes. This study achieves rapid treatment of dye wastewater with wide applicability and provides valuable insights into dye wastewater treatment and environmental remediation.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Yuchao Fan,Xu Mei,Beibei Liu,Jianfeng Wang,Li Ye,Yingjiu Zhang,Xinjian Li
The size of reinforcements is a pivotal and conventional parameter in metal matrix composites . Based on the distinctive preparation process of MXene , this research introduces a novel strategy to tailor the size of Ti 3 C 2 T x through the controlled ball milling of its precursor, Ti 3 AlC 2 . This approach fabricated Ti 3 C 2 T x sheets with sizes of 4.7 µm, 1.8 µm, and 0.6 µm. Subsequently, these Ti 3 C 2 T x sheets are incorporated into a magnesium (Mg) matrix composite to investigate the effect of Ti 3 C 2 T x size on the strengthening performance. The findings reveal a trend wherein the compressive yield strength (CYS) of the Ti 3 C 2 T x /ZK61 composites increases and the failure strain decreases with the decreased size of Ti 3 C 2 T x . Incorporating 4.7 µm Ti 3 C 2 T x results in an 11.0% reduction in CYS coupled with a 50% increase in failure strain. Incorporating 1.8 µm Ti 3 C 2 T x leads to a 4.6% increase in CYS with a 6.5% increase in failure strain. Incorporating 0.6 µm Ti 3 C 2 T x leads to a 10.7% increase in CYS with a 3.2% increase in failure strain.
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CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Bin Liu,Haonan Chen,Changrong Zhao,Heng Liang
As a 2D nanomaterial with high hydrophilic and co-catalytic properties, MXene has been widely studied in the field of membrane separation and advanced oxidation. However, its susceptibility to oxidation in catalytic environments poses a significant challenge to its long-term stability and performance. Therefore, constructing an oxidation-resistant MXene catalytic membrane technology and ensuring its excellent flux and catalytic performance are important for the practical application of MXene membranes. Herein, we prepared a cobalt monoatomic intercalated M/E0.1-Co catalytic separation membrane by mild reduction of epigallocatechin-3-gallate (EGCG). EGCG not only connects the MXene lamellae during filtration through strong hydrogen bonding, but also protects the chemical stability of the MXene substrate through its antioxidant ability. Furthermore, the trace amount of EGCG in the confined domain space also promotes the rate-limiting step of the transition from the high-valent state to the low-valent state in Co single-atom catalysis. The stability of the catalytic separation layer was ensured along with a 100% degradation performance of sulfamethoxazole. This study establishes a bridge between the catalytic oxidation and chemical stability of a wide range of MXene-based materials nowadays and provides a viable proposal for the practical application of long-term utilized MXene materials in catalysis.
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PROGRESS IN ORGANIC COATINGS
·
2024
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IF 6.5
Yuhuan Xu,Meng Pei,Xiao Zhan,Jingyu Du,Daohai Zhang
MXene-based materials that effectively deal with harmful electromagnetic waves are attracting more and more attention. In this paper, MXene hydrogels with good properties were prepared using polyvinyl alcohol (PVA) and polyacrylic acid (PAA) to construct a three-dimensional framework for hydrogels, and then adding homemade MXene materials to take advantage of their excellent properties, which resulted in the formation of an electrically conductive framework. The study shows that MXene-10 has a tensile strength of 0.29 MPa and an electrical conductivity of 156.24 S/mm. In addition, electromagnetic shielding (EMI) of 33.6 dB can be achieved when the MXene hydrogel is only 2 mm.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Dandan Huang,Hairong Li,Weining Liu,Xi Tan,Mingyang Zhao,Guohan Liu
Acetone, one of the most used solvents in industry and the laboratory, can anesthetize the central nervous system of humans and cause damage to the kidneys, pancreas, and liver. For the purpose of monitoring the leakage and concentration of acetone, α-/γ-Fe 2 O 3 /TiO 2 -X (α-/γ-Fe 2 O 3 -X) materials were successfully manufactured by in-situ solvothermal and calcination processes. Here, MIL-100-derived porous α-/γ-Fe 2 O 3 and TiO 2 nanoparticles are uniformly grown on the self-sacrificial template of exfoliated Ti 3 C 2 T x nanosheets (ex-Ti 3 C 2 T x ) that simultaneously serve as the Ti source. The heterostructure between TiO 2 and Fe 2 O 3 therein is conducive to carrier transfer and sharp resistance change. And bulk resistance-controlled γ-Fe 2 O 3 is able to raise the response to gas. Besides, the porous structure of α-/γ-Fe 2 O 3 -X could create plenty of oxygen vacancies and surface functional groups, which facilitate diffusion and contact interaction between acetone and active sites. Accordingly, the α-/γ-Fe 2 O 3 -X endow exceptional response (R = 105.5) towards 100 ppm acetone at 240 ℃, fast response/recovery time, outstanding selectivity and stability. To further substantiate this promotion mechanism, density functional theory (DFT) calculations were carried out for investigating the adsorption behavior of α-/γ-Fe 2 O 3 -X for acetone.
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ChemSusChem
·
2024
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IF 7.5
Chen Liao,Hongwei Zhou,Shunxin Zhang,Feng Wang,Ya Liu,Liejin Guo
Graphical A highly effective photocatalytic system (V Cu −CuInS 2 /MXene) was developed for transforming CO 2 into acetate under full spectrum irradiation. The incorporation of the LSPR effect and defect engineering leads to a highly selective system. Photocatalytic CO 2 conversion towards C 2+ fuels is a promising technology for simultaneously achieving carbon neutrality and alleviating the energy crisis. However, this strategy is inefficient due to the difficulty of both multi-electron transfer and C−C coupling during C 2+ formation. In this work, CuInS 2 /MXene heterostructure with Cu vacancy is rationally designed by in situ hydrothermal synthesis. The V Cu −CuInS 2 /MXene heterostructure has a suitable band structure and tight interface contact. Catalytic performances under different testing conditions, in situ spectroscopy, and COMSOL simulation reveal that LSPR-activated MXene promotes the formation of crucial intermediate CH 2 * and triggers the C−C coupling process under near-infrared light, as the key to acetate. Moreover, in situ XPS analysis, DFT calculations, and photoelectrochemical characterizations unveil that copper vacancy can promote charge transfer from CuInS 2 to MXene and boost local electron aggregation on the MXene, further enhancing the photocatalytic efficiency and selectivity of C 2 products. Contributing to the synergistic effect of copper vacancy and plasmonic MXene, V Cu −CuInS 2 /MXene achieved excellent CO 2 RR activity with an acetate evolution rate of 250.0 μmol/h/g and a selectivity of 97.5 % under the full spectrum irradiation, which is 38.8 and 3.3 times higher than that of V Cu −CuInS 2 and CuInS 2 /MXene, respectively.
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