JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jie Xu,Xueying Yang,Yongjin Zou,Luping Zhu,Fen Xu,Lixian Sun,Cuili Xiang,Jian Zhang
MXenes have a broad application in electrochemical energy storage. However, the smooth surface of high-density MXenes makes it difficult to stabilize the anchored active material. In this study, ultrathin Ti 3 C 2 MXenes were doped with a high density of NiMoS 4 nanoparticles with the assistance of dopamine (DA). DA was adsorbed by the Ti 3 C 2 surface (Ti 3 C 2 -DA) to form a negatively charged layer, which was beneficial for the enrichment of metal ions. NiMoS 4 was anchored to Ti 3 C 2 -DA via a hydrothermal reaction . The resultant Ti 3 C 2 -DA-NiMoS 4 heterostructure increased the exposure of NiMoS 4 active sites, and reduced the decrease in specific capacitance caused by volume changes. Consequently, Ti 3 C 2 -DA-NiMoS 4 exhibited excellent electrochemical performance with a high specific capacitance of 1288 F g −1 at 1 A g −1 . In addition, an asymmetric supercapacitor based on a Ti 3 C 2 -DA-NiMoS 4 positive electrode achieved a high energy density of 40.5 Wh kg −1 at 810 W kg −1 , and demonstrated excellent cycling stability (capacitance retention of 89% after 9000 cycles at 10 A g −1 ). These results demonstrate that the Ti 3 C 2 -DA-NiMoS 4 heterostructure is a prospective candidate material for high-performance supercapacitors.
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高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 33
·16196-16204
·
IF 9.931
Jianqiu Zhao,Yawei Yang,Chenhui Yang,Yapeng Tian,Yan Han,Jie Liu,Xingtian Yin,Wenxiu Que
Solar steam generation is a renewable, environmentally friendly and low-cost technology for seawater desalination and wastewater remediation. Highly efficient solar evaporation from pure water has been achieved using advanced artificial architectures and hydrophilic light absorption materials, while the long-term steady work for high salinity water desalination becomes a non-negligible problem when it comes to practical use. In terms of this issue, a hydrophobic MXene membrane, which contains a salt-blocking delaminated Ti3C2 nanosheet layer with trimethoxy(1H,1H,2H,2H-perfluorodecyl)silane modification for sunlight harvesting and a piece of commercial filter membrane for water supply, is proposed in this work. With high light utilization, high stability, abundant evaporating channels, rapid water transport through the filter membrane and salt-blocking on the MXene membrane, the as-fabricated self-floatable device achieves a solar evaporation rate of 1.31 kg m−2 h−1 and a solar steam conversion efficiency of 71%, and stability under high salinity conditions under one sun over 200 hours, ensuring the highly efficient and long-term stable photothermal transduction for water purification from seawater and wastewater containing organic dyes and heavy metals. The hydrophobic surface enabled salt-blocking MXene membrane is proved to be an effective, efficient and stable photothermal material for solar desalination.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Wenwen Tu,Yucheng Liu,Mingyan Chen,Lili Ma,Lingli Li,Bing Yang
In this study, an original photocatalytic self-cleaning composite membrane with the fabrication of graphene oxide (GO), polyacrylic acid (PAA), and g-C 3 N 4 (CN)/amorphous Ti-peroxo complexes (CATC) was prepared on the commercial cellulose acetate membrane (CAM) through the vacuum filtration approach to overcome the common membrane fouling issues. The material properties of composites or membranes were characterized. Here, the permeability and separation performance of membranes were optimized by CATC and PAA dosages. A series of membrane separation tests revealed that the produced membrane had better permeability and dye removal capabilities. A pure water flux (PWF) of the GO/PAA/CATC (GPC) membrane was 30.95 L·m −2 ·h −1 , corresponding to 3.43 times in comparison to that of the pure GO membrane. The removal efficiencies for the GPC membrane towards methylene blue (MB), rhodamine b (RhB), Cu(NO 3 ) 2 , and congo red (CR) were over 99% due to the hydrogen bond, π-π, electrostatic, and physical sieving effects. Also, the GPC membrane demonstrated a favorable separation performance towards oil/water emulsion (over 98%). In addition, the GPC membrane maintained stable rejections towards MB, CR, RhB, and Cu(NO 3 ) 2 at pH 3, 5, 7, 9, and 11 environments. Meanwhile, the self-cleaning GPC membrane was endowed with satisfactory reusability after 6 cycles because of the photocatalytic effect at the roles of h + , O 2 − , and OH free radicals. Hence, it can be expected that the GPC membrane synthesized in this study poses a favorable utilization capability in wastewater treatment.
研究领域:
环境科学
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材料科学
·
化学工程
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Qingsong Zhu,Xinyu Lei,Xiaoqin Zha,Eman Ramadan Elsharkawy,Chenye Ren,Huiyuan Chang,Salah M. El-Bahy,Juanna Ren,Renjie Wang,Zeinhom M. El-Bahy,Zhanhu Guo
Ti 3 C 2 MXene (TM) has great application potential in the field of wave absorption and corrosion resistance due to its unique performance, such as high specific surface area, high electrical conductivity, excellent mechanical and good chemical stability. However, it is difficult to obtain uniformly dispersed TM in the resin matrix due to rapid agglomeration behavior. It is difficult to obtain uniformly dispersed Ti 3 C 2 MXene (TM) in the resin matrix due to rapid agglomeration behavior. Herein, a novel method is presented to improve the corrosion protection and dispersion of TM by polymerizing polyaniline (PANI) nanoparticles between layers. The waterborne epoxy (WEP) coating with PANI-TM had high mechanical properties including impact resistance, adhesion, and flexibility and wear resistance. The PANI-TM-WEP composites can effectively absorb more than 90 % of the electromagnetic waves and demonstrate a decreased glass transition temperature of WEP from 128.0 to 107.6 ℃. Moreover, the |Z| 0.01Hz value of the PANI-TM 0.5 % was 1.2369 × 10 6 Ω·cm 2 , which was one order of magnitude larger than WEP coating. The high-performance anticorrosion of PANI intercalated TM coating is attributed to the synergistic effect of impermeable TM nanosheets and passivation effect of PANI. Therefore, PANI-TM is a potential choice for applications in the fields of anticorrosion and microwave absorption.
研究领域:
材料科学
·
化学工程
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CRYSTENGCOMM
·
2024
·Vol. 26
·期 38
·5440-5451
·
IF 2.6
Xiaoyun Ye,Hangyu Zhong,Yumei Zhang,Xuehua Liu,Wei Tian,Li-An Ma,Qianting Wang
Previous studies on photocatalytic technology have shown that doping co-catalysts and constructing composite heterojunctions are effective strategies for improving the photocatalyst performance. The Ti3C2/SrTiO3/g-C3N4 composite photocatalyst with a gradient heterostructure was prepared by the high-temperature calcination method with Ti3C2 as the co-catalyst. The effects of g-C3N4 content on the microstructure and hydrogen evolution rate of the Ti3C2/SrTiO3/g-C3N4 composites were investigated under simulated sunlight. The results showed that the photocatalyst with 60 wt% of g-C3N4 had the optimal hydrogen evolution rate of 1733.13 μmol g−1 h−1 after simulated sunlight irradiation for 4 h, which was approximately 3.3 times higher than that of Ti3C2/SrTiO3. After four photocatalytic hydrogen evolution cycles, no significant decrease in the hydrogen evolution rate of the Ti3C2/SrTiO3/g-C3N4 composite was observed. This work may serve as a rational reference on the synergistic effect of heterostructures and cocatalysts to improve the separation effect of electron–hole pairs, thus improving the hydrogen evolution effect of the catalyst.
研究领域:
材料科学
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能源化学
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ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Ying Tang,Juan Jia,Hui Zeng,Zebao Rui
In N2 photoreduction, photogenerated holes and electrons are involved in H2O photolysis for proton supply and the weakening of the N≡N triple bond for N2 activation, respectively. Rationally regulating the structure–activity relationship of these catalytic sites for available generation of charge carriers is crucial for optimizing N2-to-NH3 conversion efficiency. Herein, a robust photothermal catalyst carboxyl-enriched supramolecular (perylene tetracarboxylic acid, PTA) functionalized MIL-125(Ti)/MXene having dynamic proton extraction sites is designed for efficient N2 photoreduction. Among these, MIL-125(Ti), PTA, and Ti3C2 MXene are, respectively, responsible for N2 activation, reliable proton supply through interconversion between Brønsted acid and its conjugated base, and a photothermal response for accelerated reaction kinetics. The synergistic collaboration of these functionally distinct modules enhances light harvesting and responsiveness for dynamic multielectron/proton extraction, thereby facilitating feasible photothermal catalytic ammonia production. Remarkably high solar-to-ammonia conversion rates of 314.5–654.7 μmol g–1 h–1 are achieved under 100–500 mW cm–2 illumination. This work provides insights into the rational design of an efficient solar ammonia synthesis system.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xuefeng Sha,Xianyin Song,Qiwei Shangguan,Yawei Lv,Fan Zeng,Xingang Zhang,Xueli Wu,Minghao Yu,Changzhong Jiang
MXene has emerged as a promising alternative to carbon-based capacitor materials since its inception, however, the current practical implementation still faces dual challenges: environmentally hazardous, time-consuming synthesis procedures and intrinsically low-concentration pseudocapacitive active sites. Herein, a short-duration, eco-friendly and high-efficiency double fluoride salt hydrothermal strategy was proposed to fabricate Ti 3 C 2 MXene with unparalleled electrochemical properties. A comprehensive and good balance, including rapid MAX phase etching, just-right titanium terminal water oxidation, and ammonia reduction activation, is achieved via a one-step NH 4 HF 2 hydrothermal reaction at 160 °C for merely 1 h (TOR-MXene). It drastically outperforms conventional HF acid etching at 60 °C for 48 h (P-MXene). Systematic experimental characterizations (HRTEM, SAXS, XPS, EXAFS, EPR and in-situ XRD, in-situ Raman) and DFT calculations consistently reveal that instead of the generally believed pore expansion, the abundant highly-reduced titanium dioxide nanoclusters anchored on the surface of MXene exhibit substantial pseudocapacitive activation, accompanied by the threshold Bader charge of Ti atoms exceeding 10.5 |e|. Consequently, the prepared TOR-MXene delivers a remarkable specific capacitance of 446.1 F g −1 even at the ultrahigh current density of 30 A g −1 , a sixfold improvement over the P-MXene of 74.8 F g −1 . Moreover, the TOR-MXene electrode displays around 91.2% capacitance retention over 50,000 cycles, showing an extremely high cycling stability. This strategy establishes atomic-level design principles for MXene-based energy storage, advancing efficient synthesis and performance optimization.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Hao Siyu,Zhu Qingsong,Peng Xingna,Fan Jiayi,He Zimeng,Li Wei
Given the rapid advancements in digital and communication technology, electromagnetic wave pollution has emerged as a pressing concern for society. In addition, wave-absorbing materials are typically utilized in complex and dynamic environments, where they are susceptible to corrosion, which can result in a reduction in their effectiveness. Herein we synthesized a polypyrrole functionalized Ti 3 C 2 MXene (PPy-TM) hybrid with significant electromagnetic wave absorption and superior corrosion resistance by in situ polymerization method, which due to the in situ polymerization process of PPy on TM's surface causes the smoothness of TM's surface to turn coarse. The composite exhibited an optimal reflection loss of − 35.5 dB at 3.60 GHz for a 7.50 mm thickness. Additionally, the value of |Z| 0.01 Hz for PPy-TM 0.5% (5.1218 × 10 4 Ω cm 2 ) was an order of magnitude higher than the WEP (7.9778 × 10 3 Ω cm 2 ) coating after 30 days of exposure to 3.5 wt% NaCl electrolyte. This study establishes a benchmark for designing next-generation materials that integrate robust microwave absorption with long-term corrosion protection.
研究领域:
材料科学
·
电磁干扰屏蔽
·
腐蚀工程
·
纳米复合材料
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高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Bingjie Wen,Nizao Kong,Min Huang,Liqin Fu,Dingbang Yan,Yexin Tian,Jinshui Liu,Ruixuan Tan,Fei Han
Despite the outstanding theoretical capacities of two-dimensional (2D) molybdenum sulfide (MoS2) with low costs, its low conductivity and easy agglomeration greatly impede the business application as anode materials. The heterostructures between 2D MoS2 and Ti3C2 MXene are able to combine the collective superiorities of MoS2 and Ti3C2, thus greatly ameliorating the electrical conductivity and rate capacity through synergistic effects. Herein, we design a simple intercalation–sulfidation strategy for the construction of the TH MoS2/Ti3C2 heterostructures with a compact stacking lamellar structure and investigate the electrochemical sodium storage properties of the composite. In the architecture, fallen leaf-like MoS2 nanosheets with a mixed-phase crystal containing 1T and 2H phases grow tightly on the surface and interlayer of Ti3C2 matrixes. The expanded layer spacing of Ti3C2 as a result of MoS2 insertion can greatly accelerate electronic/sodium ion transport. Meanwhile, 2D Ti3C2 can serve as a strong mechanical support for the composite electrode to provide a buffer space for volume expansion and avoid structural collapse during cycles. Benefiting from these structural advantages, the TH MoS2/Ti3C2 anode reveals higher sodium storage capacity of 743.6 mAh g–1 than bare MoS2 (579.4 mAh g–1) at 0.2 A g–1. Furthermore, the anode exhibits significantly improved battery rate performance with a high sodium storage capacity of 653.3, 539.1, 512.1, 488.7, 439.3, and 586.7 mAh g–1 at 0.2, 0.5, 1, 2, 5, and 0.2 A g–1. Our study provides a unique synthesis route to construct layered heterostructure composites by artificial stacking of different types of 2D materials, which are considered as highly promising electrode materials for sodium-ion batteries (SIBs).
研究领域:
材料科学
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电化学
·
纳米材料
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能源存储
·
无机化学
·
固态物理
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Wenlei Zhang,Weiheng Wang,Yunfan Wang,Lei Sun,Yongjiao Sun,Jie Hu
The continuous discharging of nitrogen dioxide (NO 2 ) significantly damaged global environment and human health. In this study, SnS 2 microflowers/Ti 3 C 2 MXene heterostructure was modified by Au nanoparticles (AuNPs) for the detection of NO 2 at room temperature. The microcomposite decorated with 6 wt% AuNPs exhibited excellent sensing properties including response value of 5.34 to 1 ppm NO 2 , which was almost 5 times higher than that of undecorated one. The limit of detection lowered from 500 ppb to 5 ppb with the addition of AuNPs. Besides, the AuNPs decorated SnS 2 /MXene microcomposite revealed good selectivity, fatigue resistance, as well as potential application towards flexible sensing. The NO 2 gas sensing mechanism of AuNPs decorated with SnS 2 /Ti 3 C 2 MXene microcomposite was discussed through density functional theory calculation on adsorption behavior and transferred charges in detail. This work may provide an important pathway for the future development of NO 2 sensors at room temperature.
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高影响因子
ANALYST
·
2022
·Vol. 147
·期 23
·5557-5563
·
IF 5.227
Lin Mei,Yanmei Shi,Yange Shi,Pengpeng Yan,Chunlei Lin,Yue Sun,Bingjie Wei,Jing Li
Quantum dots functionalization has been proven to be a simple modification strategy for improving the electroanalytical performance of two-dimensional electrode materials by increasing the specific surface area and active reaction sites. Herein, a new electrochemical sensing platform was fabricated by SnO2 quantum dot-functionalized Ti3C2 MXene (Ti3C2-SnO2QDs) for the highly sensitive detection of Sudan I in food. Ti3C2-SnO2QDs were prepared via in situ synthesis, which can control the nucleation and growth of SnO2QDs, resulting in the well-dispersed SnO2QDs with 2–3 nm size on the intersheet surface of MXene. Moreover, the formation of Ti3C2-SnO2QDs can effectively restrict the aggregation of Ti3C2 and improve the stability of SnO2QDs in aquatic environment. The prepared nanocomposite can be used as an improved modified material to further increase the electrocatalytic performance and electrochemical signal of Sudan I on the surface of a glassy carbon electrode. Under optimized conditions, the proposed analytical method displayed a linear dependence for Sudan I concentration ranging from 0.008 to 10 μM with a detection limit of 0.27 nM (S/N = 3) by electrochemical cyclic voltammetry. This sensor with excellent selectivity, reproducibility and accuracy was quantitatively validated in commercial ketchup and chili powder. This Ti3C2-SnO2QDs-based Sudan I sensor is expected to expand the application of MXene nanocomposites in electrochemical analysis and is envisioned as a promising candidate for monitoring illegal food additives in real food samples.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Shuang Zhao,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu
Currently, NO pollution is an urgent challenge for us to face, and photocatalytic degradation has been recognized as one of the most promising methods to reduce it. As a representative photocatalyst , g-C 3 N 4 has attracted researchers because of its low cost and excellent performance. In this work, a new triphasic Z-scheme heterostructure was built, TiO 2 /Ti 3 C 2 MXene/g-C 3 N 4 , to improve the visible-light irradiation-induced NO removal efficiency of g-C 3 N 4 . In this Z-scheme heterostructure, Ti 3 C 2 MXene could form a directional electron transfer thoroughfare between g-C 3 N 4 and TiO 2 to accelerate the electronic transmission rate, meanwhile, due to the specificity of the band structure, electrons on conduction band of g-C 3 N 4 and holes on valence band of TiO 2 can be well separated and react with the adsorbed species to achieve good photocatalytic performance. Because of the triphasic heterostructure formed by TiO 2 , Ti 3 C 2 MXene and g-C 3 N 4 , the efficiency of this compound for visible-light irradiation-induced NO removal improves from 32% to 56%. This work provides a new strategy to improve NO removal efficiency and shows a broader application prospect of photocatalysts with a triphasic structure.
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高影响因子
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