APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Yiyang Ma,Xiaofan Lv,Dongbin Xiong,Xuesong Zhao,Zhenghua Zhang
Magnetic nanoscale zero-valent iron (nZVI)@Ti 3 C 2 -based MXene nanosheets were synthesized via an in-situ reductive deposition method, and were characterized as a novel Fenton-like catalyst for ranitidine degradation. The vast majority of ranitidine was found to be mineralized after 30 min of reaction time with 91.1 % of removal efficiency and the removal of 63.3 % of total organic carbon (TOC). Results showed that the nZVI@Ti 3 C 2 -based MXene nanosheets had a synergistic effect enhancing the catalyst chemical reactivity and stability. In particular, Ti 3 C 2 -based MXene was found to restrain the agglomeration of nZVI particles (nZVIPs) and promote electron transfer between magnetic particles with a diameter of approximately 10−40 nm. Ranitidine molecules were decomposed mainly by hydroxyl radicals ( ∙ OH) attack especially the surface-bound ∙ OH ads . This study provided a completely new insight into the mode of surface inactivation of nZVIPs under different solution pH conditions, establishing that this novel catalyst was suitable for use under a wide pH range.
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高影响因子
Nanoscale
·
2020
·Vol. 13
·期 5
·2923-2930
·
IF 6.895
Xiaowei Li,Na Zhang,Ruizhi Tang,Jiawen Lyu,Zhen Liu,Shujuan Ma,Junjie Ou,Mingliang Ye
MAX and MXene have received considerable attention owing to their outstanding performance in fields like battery and catalysis. However, their possible biomedical applications have rarely been considered, especially the affinity chromatographic applications in proteomics. In this work, considering the large number of exposed metal sites, small binding potential resistance and fast mass transfer speed, layered ternary carbides MAX-Ti3AlC2 and MXene-Ti3C2 with a two-dimensional nanostructure were successfully explored for the first time as affinity chromatography stationary phases for the specific capture of phosphopeptides from complex biological samples. Helium ion microscopy, transmission electron microscopy, atomic force microscopy, X-ray diffraction spectra, X-ray photoelectron spectroscopy and zeta potential measurement results confirmed that the MXene-Ti3C2 was well exfoliated from the pristine MAX-Ti3AlC2. Ti3AlC2 showed better enrichment specificity than MXene-Ti3C2. The detection limit of Ti3AlC2 was as low as 5 fmol. Even when the molar ratio of BSA to β-casein tryptic digests increased to 1000 : 1, two characteristic phosphopeptides with a relatively clear background could be detected after enrichment. After five cycles of repeated use, the enrichment specificity of Ti3AlC2 still remains. Furthermore, 91 and 830 unique phosphopeptides from 23 and 525 phosphoproteins were identified from milk and BEL7402 cells, respectively. Among them, 27 and 170 phosphopeptides, 12 and 56 phosphoproteins identified from milk and BEL7402 cells were not detected with commercial TiO2 after three independent replicates, which have great potential in providing complementary coverage of phosphoproteome. This work opens up new applications of Ti3AlC2 and MXene-Ti3C2, and will play more important role for phosphorylated proteomics in biomedicine.
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PubMed
高影响因子
ANALYST
·
2020
·Vol. 145
·期 22
·7421-7428
·
IF 3.978
Xuejiao Fang,Yuhang Song,Yi Huang,Guohai Yang,Caiqin Han,Haitao Li,Lulu Qu
Ultrathin two-dimensional MXene nanosheets were decorated on the surface of silver nanorods (AgNRs) through a facile modification strategy to prepare highly sensitive and reproducible SERS substrates (AgNR/MXene substrate). The MXene nanosheets could suppress the oxidation of the silver nanorods, which endows the substrate with good stability and reproducibility. Due to the strong interaction between AgNR/MXene and the analytes, the substrate also exhibited high SERS performance with the limit of detection (LOD) of crystal violet (CV) as low as 2.48 × 10−11 M. In particular, the AgNR/MXene substrate enabled on-site determination of 3,3′,4,4′-tetrachlorobiphenyl (PCB-77) and 4-chlorobiphenyl (PCB-3) and the LODs were low at 2.43 × 10−10 and 2.14 × 10−9 M, respectively. In addition, the AgNR/MXene substrate could be used for the detection of single-component and multi-component PCBs in real soil samples with good recovery percentages (90.3% and 91.6% for PCB-3 and PCB-77 in single-component format, 108.1% and 106.5% for PCB-3 and PCB-77 in multi-component format). The AgNR/MXene substrate combines the synergistic properties of both AgNRs and MXene, showing great potential in simultaneous SERS detection of multiple pollutants at the point of need.
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高影响因子
ACS Nano
·
2020
·
IF 14.588
Lin Wang,Meiyun Zhang,Bin Yang,Jiaojun Tan,Xueyao Ding
Various wearable aerogel sensors are emerging for their light weight, fairly wide sensing range, and sensitive sensing ability. Aramid nanofibers (ANFs) as a kind of burgeoning building blocks realize multifunctional applications in diversified fields for their innate extinguished mechanical property and thermal stability. Limited by their high insulating property, in this work ANFs were designed to integrate with a 2D emerging MXene sheet with a distinct conductive property. Herein, we report an MXene/ANFs composite aerogel through a feasible controllable vacuum filtration followed by a freeze-drying process. Benefiting from the inerratic 3D hierarchical and “mortar–brick” porous structure with an ultralow density of 25 mg/cm3, MXene/ANFs aerogels are proved to possess high compressible resilience and appealing sensing performance up to 1000 times. Importantly, verified by a series of simulation experiments, the MXene/ANFs aerogel sensor shows a wide detection range (2.0–80.0% compression strain), sensitive sensing property (128 kPa–1), and ultralow detection limit (100 Pa), which still play a flexible role in detecting human light movement and even vigorous sports after undergoing ultrahigh devastating pressures (∼623 kPa). In addition, the MXene/ANFs aerogel sensor can withstand a harsh high temperature of 200 °C and shows excellent flame resistance. The MXene/ANFs aerogel with excellent integrated property, especially the highly sensitive sensing property and excellent thermal stability, presents great potential for a human behavior monitoring sensor and sensing under certain extreme conditions.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Chong Cai,Ran Wang,Shufeng Liu,Xiaoya Yan,Lexin Zhang,Mingli Wang,Qi Tong,Tifeng Jiao
In recent years, new family of two-dimensional (2D) transition metal carbide and carbonitrides-MXene has become critical materials due to their excellent structure and performance. Herein, we have investigated the synthesis of a new MXene-based composite material for efficient dye adsorption in sewage treatment, via a facile hydrothermal method . The characterization of the phytic acid (PA)-MXene composites showed that new rod-like Ti(OH)PO 4 components appeared in the hydrothermal process. In addition, compared with the original MXene , the prepared PA-MXene composite exhibited enhanced adsorption properties for the model dyes MB and RhB, and the adsorption capacity of the PA-MXene composite on MB remained at about 85 % after 12 cycles, indicating important potential as an adsorbent material in wastewater treatment .
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ACS Nano
·
2020
·
IF 14.588
Chuang Sun,Xinlei Shi,Yabo Zhang,Jiajie Liang,Jie Qu,Chao Lai
Lithium-iodine (Li-I2) batteries are promising candidates for next-generation electrochemical energy storage systems due to their high energy density and the excellent kinetic rates of I2 cathodes. However, dissolution of iodine and iodide has hindered their widespread adoption for practical applications. Herein, a Ti3C2Tx MXene foam with a three-dimensional hierarchical porous architecture is proposed as a cathode-electrolyte interface layer in Li-I2 batteries, enabling high-rate and ultrastable cycling performance at a high iodine content and loading mass. Theoretical calculations and empirical characterizations indicate that Ti3C2Tx MXene sheets with high metallic conductivity not only provide strong chemical binding with iodine species to suppress the shuttle effect but also facilitate fast redox reactions during cell cycling. As a result, the Li-I2 battery using a cathode with 70 wt % I2 cycled stably for over 1000 cycles at a rate of 2 C, even at an ultrahigh loading mass of 5.2 mg cm–2. To the best of the authors’ knowledge, this is the highest reported loading at such a high iodine content. This work suggests that using a Ti3C2Tx MXene interface layer can enable the design and application of high-energy Li-I2 batteries.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Haoran Song,Yuwei Wang,Zheng Ling,Daoyuan Zu,Zhuo Li,Yongming Shen,Changping Li
In-situ construction of heterojunction photocatalyst on two-dimensional (2D) Ti 3 C 2 MXene substrate has been proved to be a feasible method to enhance the photocatalytic degradation of organic pollutants. However, the limited interlayer spacing of 2D Ti 3 C 2 hinders the in-situ growth of TiO 2 photocatalyst. Herein, the intercalation strategy was developed in deep eutectic solvents (DESs) method to achieve interlayer expansion of Ti 3 C 2 and improve Ti 3 C 2 -derived photocatalyst performance. Because of the intercalation of choline cations, the DESs method synthesized Ti 3 C 2 (Ti 3 C 2 -DES) had the larger c -lattice parameter than that of traditional HF method synthesized Ti 3 C 2 (Ti 3 C 2 -HF). The interlayer space of Ti 3 C 2 -DES could be intercalated with more water molecule for oxidization of the Ti atoms, which remarkably promoted the in-situ growth of TiO 2 crystals. The formed heterojunction between (001) and (101) facets enhanced carriers separation. The Ti 3 C 2 substrate with excellent conductivity further promoted carriers transfer. As a result, Ti 3 C 2 /TiO 2 photocatalyst exhibited superior perfluorooctanoic acid (PFOA) removal performance (almost 100% removal efficiency and 49% defluorination efficiency within 16 h) compared with the traditional Ti 3 C 2 -HF/TiO 2 (22% removal efficiency and 12% defluorination efficiency within 16 h). This study provides a feasible strategy for enhancing photocatalytic degradation of PFOA by Ti 3 C 2 MXene-derived heterojunction photocatalyst.
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高影响因子
Nano Research
·
2019
·Vol. 13
·期 1
·255-264
·
IF 8.515
Zhao Xing,Zha Xiang-Jun,Tang Li-Sheng,Pu Jun-Hong,Ke Kai,Bao Rui-Ying,Liu Zheng-ying,Yang Ming-Bo,Yang Wei
As a renewable and environment-friendly technology for seawater desalination and wastewater purification, solar energy triggered steam generation is attractive to address the long-standing global water scarcity issues. However, practical utilization of solar energy for steam generation is severely restricted by the complex synthesis, low energy conversion efficiency, insufficient solar spectrum absorption and water extraction capability of state-of-the-art technologies. Here, for the first time, we report a facile strategy to realize hydrogen bond induced self-assembly of a polydopamine (PDA)@MXene microsphere photothermal layer for synergistically achieving wide-spectrum and highly efficient solar absorption capability (≈ 96% in a wide solar spectrum range of 250–1,500 nm wavelength). Moreover, such a system renders fast water transport and vapor escaping due to the intrinsically hydrophilic nature of both MXene and PDA, as well as the interspacing between core-shell microspheres. The solar-to-vapor conversion efficiencies under the solar illumination of 1 sun and 4 sun are as high as 85.2% and 93.6%, respectively. Besides, the PDA@MXene photothermal layer renders the system durable mechanical properties, allowing producing clean water from seawater with the salt rejection rate beyond 99%. Furthermore, stable light absorption performance can be achieved and well maintained due to the formation of ternary TiO2/C/MXene complex caused by oxidative degradation of MXene. Therefore, this work proposes an attractive MXene-assisted strategy for fabricating high performance photothermal composites for advanced solar-driven seawater desalination applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Weiyi Chen,Bin Han,Yili Xie,Shujie Liang,Hong Deng,Zhang Lin
Converting carbon dioxide (CO 2 ) to multiple energy-rich chemicals by photocatalysis could validly mitigate the severe issues of climate changes and energy shortages. Exploring efficient catalysts for enhancing the performance of CO 2 photoreduction is still challenging. Herein, a novel three-dimensional hierarchical Co-Co layered double hydroxide/Ti 3 C 2 T X nanosheets (Co-Co LDH/TNS) nanoarray was successfully prepared via an in-situ MOF-derived strategy. This wise design rationally integrates the functional and structural merits of active Co species with conductive MXene to a hierarchical nanoarray architecture composed of ultrathin nanosheets, which can remarkably promote separation of photogenerated charge carriers and accelerate electrons transmission. Benefitting from these features, the hierarchical Co-Co LDH/TNS composites manifest significant enhancement on the CO 2 -to-CO evolving rate (1.25 × 10 4 µmol h −1 g −1 ) under illumination (>400 nm) with a high apparent quantum efficiency (0.92%) and excellent stability. Our work demonstrates that 3D hybrid structure composed of MXene species can serve as promising candidates for CO 2 photoreduction, providing fundamental guidance to improve photocatalytic performance by rational engineering of complex hierarchical architecture materials.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Guohong Wang,Jianxi Liu,Xiangcheng Liu,Minghang Li,Jiongjie Liu,Nan Chai,Fang Ye,Jimei Xue,Xiaomeng Fan,Hailong Xu,Xingmin Liu,Laifei Cheng
MXenes have been the spotlight of interest as electromagnetic (EM) functional materials. However, the susceptibility (e.g., easy oxidation and fast decomposition) of MXenes leads to the fast fading of EM interference shielding effectiveness (EMI SE), which can be attributed to the easy degredation of MXene by reaction with water and oxygen in air. In this work, a series ofoxidation-resistant vitamin C/Ti 3 C 2 T X foam composites were developed as an EMI shielding material. The vitamin C/Ti 3 C 2 T X foam composites exhibited improved EM SE stability due to the protection of vitamin C by donating electrons. After exposing to air for 10 days, the EMI SE of vitamin C/Ti 3 C 2 T X foam decreased slightly from 42.5 dB to 41 dB while the EMI SE of Ti 3 C 2 T X foam dropped significantly from 47 dB to 35 dB. The EMI SE of vitamin C/Ti 3 C 2 T X foam and Ti 3 C 2 T X foam decreased correspondingly with further increase of exposuring time in air. However, the decreasing rate of vitamin C/Ti 3 C 2 T X foam is always slower than that of the Ti 3 C 2 T X foam. This work offers an effective way for the designing of oxidation-resistant MXene-based EMI shielding materials.
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RSC Advances
·
2022
·Vol. 12
·期 8
·4836-4842
·
IF 4.036
Yingxin Chen,Chunli Yang,Xiaotong Huang,Lu Li,Na Yu,Huan Xie,Zebin Zhu,Yong Yuan,Lihua Zhou
A composite of cuttlefish ink-based carbon quantum dots@Ag/MXene (CQD@Ag/MXene) was firstly synthesized by solvothermal method as a catalyst for reduction of p-nitrophenol (PNP) to p-aminophenol (PAP). CQD@Ag/MXene was characterized by scanning electron microscopy (SEM), field emission transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman. The results show that loading on 2D material MXene can prevent the aggregation of CQD@Ag and expose more active sites, which contributes to a superior catalytic activity with a pseudo-first-order rate constant k (2.28 × 10−2 s−1) and mass-normalized rate constant km (5700 s−1 g−1), nearly 2 times higher than CQD@Ag without MXene (k = 1.09 × 10−2 s−1 and km = 2725 s−1 g−1). Besides, CQD@Ag/MXene showed excellent reusability which even retained about 65% activity in successive 10 cycles. The high adsorption rate to PNP and the promotion of forming H radicals may be the reason for the outstanding catalytic activity of CQD@Ag/MXene. CQD@Ag/MXene can be a potential candidate in the removal of environmental pollutants due to its facile synthesis and high catalytic efficiency.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Lihai Zhang,Dapeng Wang,Hongqiang Xu,Enlong Yang,Fangqing Ge,Wanli Han
To meet the urgent demands for resource conservation, environmental protection and low emissions in the process of sustainable development, this study combines MXene with alkaline-treated hollow kapok fiber and integrates it onto a polyacrylonitrile (PAN) nanofiber mesh through vacuum filtration, successfully preparing a lightweight GO/MXene@NaOH-treated kapok fiber/PAN (GMKNP) composite material. Utilizing the natural hollow structure of kapok fibers and the gaps of the PAN nanofiber mesh as reflection units and thermal insulation units, while using the PAN nanofiber network as the mechanical support framework, through interfacial self-assembly, a multi-level pore structure is formed to achieve the synergistic integration of absorption-based electromagnetic shielding and low-frequency broadband sound absorption in a single biomass-based composite material. This layered porous structure enables the GMKNP to maintain a density of only 0.187 g/cm3, featuring an absorption-dominated shielding mechanism, where the absorption loss accounts for 78.4% of the total shielding effect, thereby effectively reducing secondary electromagnetic reflection. Its electromagnetic interference (EMI) shielding efficiency reaches 31.9 dB, effectively blocking electromagnetic radiation. The thermal conductivity of the material is only 0.09 W/(m·K), demonstrating excellent thermal management performance. Additionally, it shows a maximum sound absorption coefficient of 0.7 in the low-frequency range of 400-1600 Hz. This study provides a new multifunctional composite material design scheme with comprehensive sound, heat and electromagnetic protection capabilities for fields such as automotive cabins, aircraft interiors and green buildings.
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