SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Di Zhang,Bing Zhao,Lijie Liu,Hao Tang,Xiangxue Wang,Shujun Yu
Although two-dimensional transition metal carbides and carbonitrides (MXenes) are becoming increasingly popular in contaminant remediation field, the preparation of MXene nanosheets that can efficiently eliminate the target pollutants still deserves in-depth investigation. Here we produced amidoxime Ti 3 C 2 T x nanosheets (TC-AO), which were efficient radionuclide adsorbents with high stability and positive affinity, by introducing the amidoxime group into the Ti 3 C 2 T x MXene surface through grafting by diazonium salt. The high stability and abundant functional groups of TC-AO were demonstrated by different characterization techniques such as scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analyzer (TGA), and X-ray photoelectron spectroscopy (XPS). Multiple factors affecting the radionuclide removal performance were explored, including reaction time, temperature, pH, ionic strength, anions and cations. The experimental results demonstrated that the radionuclide uptake by TC-AO was a heat-absorbing, spontaneous single-molecule chemisorption process and was consistent with the pseudo-secondary and Langmuir models. When pH < 6, the mechanism of uranium removal was inner complexation, and as the pH continued to increase, uranium removal shifted to outer complexation. Furthermore, the results certificated that TC-AO exhibited fast reaction kinetics (reaching equilibrium in about 20 min), excellent removal efficiency (279.57 mg U·g −1 and 73.99 mg Eu·g −1 ), outstanding selectivity and good stability. The studies showed that TC-AO had good stability and functionality, which was not only valuable for the design of MXene based adsorbents, but also provided a meaningful option for the extraction of radioactive pollutants from wastewater.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
·
IF 10.319
Kunpeng Qian,Shuang Li,Jianhui Fang,Yuhuan Yang,Shaomei Cao,Miao Miao,Xin Feng
Ti 3 C 2 T x MXenes with excellent metallic conductivity and flexibility have shown a promising prospect as electromagnetic interference (EMI) shielding materials. Ultrathin, hierarchical hybrid films were fabricated by using C 60 intercalating Ti 3 C 2 T x MXenes with the assistance of water-soluble γ -cyclodextrin (CD). The C 60 /CD complex was obtained by high-speed vibration milling using hydrophilic CD as dispersing agent. After thermal annealing treatment, the obtained hybrid film exhibited excellent EMI shielding (53.52±0.43 dB), hydrophobicity (water contact angle: 93.7°) and mechanical stability (over 0.9 million bending times). Taking advantage of the antioxidant of C 60 , the chemical durability of Ti 3 C 2 T x MXenes based hybrid films was also improved as expected. These results indicate that the well-designed hierarchical hybrid films with the intercalation of C 60 have promising potential for high-performance EMI shielding applications.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 11
·1-13
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IF 5.3
Zhao Zhihua,Su Zijie,Lv Zhenli,Shi Pu,Jin Guixin,Wu Lan
Bi 2 S 3 /Ti 3 C 2 T x nanomaterials were successfully prepared through a simple hydrothermal method. Various methods were used for their characterization, including XRD, XPS, SEM, EDS, and BET, along with testing their gas-sensing properties. The results showed that the response value to 100 ppm ammonia at room temperature reached 107%, which was 14.1 times higher than that of pure few-layer MXene. After undergoing anti-humidity interference testing, we observed that Bi 2 S 3 /Ti 3 C 2 T x exhibited a higher response value in real-time monitoring of ammonia as humidity increased. Specifically, under 90% humidity conditions, its response value reached 1.32 times that of normal humidity conditions. This exceptional moisture resistance ensures that the sensor can maintain stability, and even exhibit superior performance, in harsh environments. Therefore, it possesses excellent selectivity, high-moisture-resistance, and long-term stability, making it significant in the field of medical and health monitoring. Graphical abstract
研究领域:
材料科学
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医学监测
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL SCIENCES
·
2024
·Vol. 40
·期 6
·1081-1087
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IF 1.8
Mei Xuqiao,Zeng Zhenhua,Xu Wenxin,Yang Huicong,Zheng Yuanhai,Gao Haimin,Wu Chuncai,Zheng Yanping,Xu Qiaoli,Wang Guowei,Xu Yuhuang,Wu Ayang
CA125 (carbohydrate antigen 125) is an important biomarker of ovarian cancer, so developing effective method for its detection is of great significance. In the present work, a novel sandwich-like electrochemical immunosensor (STEM) of CA125 was constructed by preparing nanoribbon-like Ti 3 C 2 T x MXenes (Ti 3 C 2 T x NR) to immobilize primary antibody (PAb) of CA125 and UIO-66-NH 2 MOFs structure to immobilize second antibody (SAb) and electroactive toluidine blue (Tb) probe. In this designed STEM assay, the as-prepared Ti 3 C 2 T x NR nanohybrid offers the advantages in large surface area and conductivity as carrier, and UIO-66-NH 2 provided an ideal platform to accommodate SAb and a large number of Tb molecules as signal amplifier. In the presence of CA125, the peak currents of Tb from the formed STEM structure increase with the increase of CA125 level. After optimizing the related control conditions, a wide linear range (0.2–150.0 U mL −1 ) and a very low detection limit (0.05 U mL −1 ) of CA125 were achieved. It’s thus expected the developed STEM strategy has important applications for the detection of CA125. Graphical abstract
研究领域:
生物医学工程
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分析化学
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肿瘤学
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产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
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2020
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IF 4.189
Zilong Zhang,Yaoyi He,Yangyang Lv,Lei Zhang,Xiqiao Chen,Zhuang Wu,Yanhong Zou
In this paper, two-dimensional Ti3C2Tx-MXenes with abundant defects and functional groups as well as appropriate conductivity were successfully synthesized by acid treatment at room temperature. The relationship between the surface structure and its electromagnetic wave absorption ability was systematically studied by changing etching time and heat treatment. Benefiting from the conduction loss and strong polarization relaxation around the abundant interface areas in the two-dimensional layered structure, the Ti3C2Tx Mxene composite possesses excellent electromagnetic absorption performance. Remarkably, optimized Ti3C2Tx exhibits extremely strong absorption with a minimum reflection coefficient of −65 dB, and the qualified absorbing bandwidth is up to 5 GHz. Furthermore, the ultrathin matching thickness of the Ti3C2Tx Mxene composite is 1.4 mm. The prominent absorbing performance outperforms most recently reported two-dimensional carbon materials for microwave absorption.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2021
·Vol. 139
·期 18
·52075
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IF 3.125
Bihua Xia,Xuhui Zhang,Yang Wang,Ting Li,Jie Jiang,Mingqing Chen,Tianxi Liu,Weifu Dong
This paper reported a new kind of multilayer cross-linking polyetherimide/Ti 3 C 2 T x MXenes material with pores channel structure for electromagnetic interference shielding. Polyetherimide was used as the resin material, ethylenediamine (EDA) was used as the cross-linking agent, special multilayer and pores channel were used as the shielding structure, and Ti 3 C 2 T x MXenes was used as the electromagnetic wave shielding medium. By adjusting the content of EDA, the cell structure, electromagnetic interference shielding efficiency, and tensile strength of multilayer cross-linking PEI/Ti 3 C 2 T x MXenes shielding material could be controlled. The more EDA content, the higher cross-linking degree, the smaller the cellular size, the higher the electromagnetic interference shielding efficiency, and the stronger the tensile strength.
研究领域:
材料科学
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电磁学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 10
·1-13
·
IF 5.3
Zhong Yu,Liao Ran,He Guowen,Liu Saiwen,Zhang Jin,Chen Chao
Cubic hollow-structured NiCo-LDH was synthesized using a solvothermal method. Subsequently, clay-like Ti 3 C 2 T x MXenes were electrostatically self-assembled with NiCo layered double hydroxides (NiCo-LDH) to form composites featuring three-dimensional porous heterostructures. The composites were characterized using SEM, TEM, XRD, XPS, and FT-IR spectroscopy. Ti 3 C 2 T x MXenes exhibit excellent electrical conductivity and hydrophilicity, providing abundant binding sites for NiCo-LDH, thereby promoting an increase in ion diffusion channels. The formation of three-dimensional porous heterostructural composites enhances charge transport, significantly improving sensor sensitivity and response speed. Consequently, the sensor demonstrates excellent electrochemical detection capability for quercetin (Qu), with a detection range of 0.1–20 µM and a detection limit of 23 nM. Additionally, it has been applied to the detection of Qu in natural plants such as onion, golden cypress, and chrysanthemum. The recovery ranged from 97.6 to 102.28%. Graphical Abstract
研究领域:
材料科学
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分析化学
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植物学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Yixuan Xia,Jiating Li,Gangbing Zhu,Yinhui Yi
Anodic stripping voltammetry (ASV) is presently the most widely used method for mercury ion (Hg 2+ ) detection, but it generally needs an electrodeposition step. As a new star nanomaterial , MXenes shows greatly important applications in electrochemical sensing. In this work, by preparing Ti 3 C 2 T x MXenes nanoribbons/carbon nanotube (Ti 3 C 2 T x R/CNT) nanohybrids to modify glassy carbon electrode (GCE) as sensing platform, an innovative strategy without electrodeposition was proposed for the sensitive detection of Hg 2+ . The results show that Ti 3 C 2 T x R exhibits spontaneous adsorption and reduction capability towards Hg 2+ , which can make Hg 2+ self-reduced and preconcentrated on the electrode surface . Coupled with the excellent electronic properties of CNT, an electrodeposition-free and sensitive ASV sensor was constructed, and Ti 3 C 2 T x R/CNT/GCE can exhibit superior sensing performances for Hg 2+ analysis with a low detection of limit (5.2 nM) and wide linearity range (0.01–7.0 μM). This work offered a new direction for MXenes nanomaterials and Hg 2+ detection.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
Catalysis Science & Technology
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2022
·Vol. 12
·期 6
·1788-1798
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IF 6.177
Jing Zhao,Yanzhuo Zhang,Hucheng Zhang,Haiyan Wang,Jianji Wang
Hydrogen spillover is an important theme for hydrogen storage and H-involving catalytic reactions. This work shows that catalytic reactivity and selectivity can be revealed by differentiating the energetic characteristics of spilled H species. With the assistance of Ti, F and C in MXenes, Pd1.8Ni@Ti3C2Tx presents a high capacity for spillover hydrogen storage at ambient temperatures, and the rich oxygenated groups act as the main carriers of hydrogen spillover around metal nanoparticles. Thermodynamic analysis reveals that the catalytic performances are energetically dominated by the adsorption enthalpies of the active spilled H species rather than the amount of spillover hydrogen, and can be tuned by alloying and surface modification. The ideas are verified from the excellent catalysis, chemoselectivity and stereoselectivity of Pd1.8Ni@Ti3C2Tx in semihydrogenations. The strategy of maximizing catalytic performances is applicable to other Pd-based bimetals@Ti3C2Tx, such as Pd2.6Co@Ti3C2Tx and Pd1.5Fe@Ti3C2Tx, and provides new energetics perspectives to understand the catalytic mechanism in spillover-involving chemical procedures.
研究领域:
催化
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材料科学
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化学工程
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纳米技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Zhenguo Wang,Ke Yu,Yu Feng,Ruijuan Qi,Jie Ren,Ziqiang Zhu
MXenes, a new class of two-dimensional materials, possessing high electrical conductivity and unique surface properties，have exhibited great potential as non-noble metal catalyst for hydrogen evolution reaction (HER). However, due to poor oxidation resistance , they are easily oxidized in aqueous solution and high humidity environment, resulting in a great loss of electronic properties and surface reactivity. Herein, we report a simple and effective composite synthesis strategy with TiOF 2 intercalation to improve the stability of MXenes materials. TiOF 2 @Ti 3 C 2 T x prepared by this strategy shows ultra-long catalytic activity life of 1000 cycles in acid electrolyte. Besides，the catalyst also shows high HER activity with a low onset potential of 103 mV and a Tafel slope as low as 56.2 mV dec − 1 . Benefiting from the stabilization of TiOF 2 and the physicochemical properties of Ti 3 C 2 T x , TiOF 2 @Ti 3 C 2 T x also exhibits excellent humidity sensitivity and stability.
研究领域:
材料科学
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化学工程
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Yong Zhao,Yixuan Xia,Juerui Zhang,Hongde Liu,Yinhui Yi,Gangbing Zhu
In this work, based on the unique self-adsorption and reduction capacities of Ti 3 C 2 T x MXenes toward silver ion, silver nanoparticles (Ag NPs) as reference probe are synthesized and immobilized on the surface of Ti 3 C 2 T x nanoribbons (Ti 3 C 2 T x R) to form Ag-Ti 3 C 2 T x R nanohybrid with a simple stirring-method, and carbon nanotubes (CNTs) are introduced to conjugate Ag-Ti 3 C 2 T x R for inhibiting their aggregation and improving further the sensing performance. Via selecting paracetamol (PA) as a model analyte, a ratiometric voltammetric sensing strategy is proposed by using Ag-Ti 3 C 2 T x R/CNTs as electrode materials on the basic of the collaborative advantages of Ag NPs, Ti 3 C 2 T x R and CNTs: in the absence of PA, Ag-Ti 3 C 2 T x R/CNTs modified electrode displays only an electrochemical signal from the oxidation of Ag 0 ; while in the presence of PA, a varied signal of PA along with its concentration can be observed coupled with a quite stable oxidation signal of Ag 0 . Based on this principle, a highly sensitive and reliable ratiometric sensing platform is designed for PA detection by recording the ratio of signals between PA and Ag 0 . It’s expected that this work exploits a new research field in electrochemical sensors by combining the synthetic advantages of MXenes and metal elements.
研究领域:
材料科学
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分析化学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Zhihui Wu,Da-Wen Sun,Hongbin Pu,Qingyi Wei,Xuanran Lin
Mycotoxin B1 (AFB1) contamination in agricultural products pose a deadly danger to animal and human health and its rapid and reliable detection is thus very important. Herein, a ratiometric surface-enhanced Raman scattering (SERS) aptasensor for AFB1 detection was developed, in which 1,2-bis(4-pyridyl) ethylene (BPE) was used to trigger the assembly of Au nanoparticle dimers (AuNP dimers) and form intensive SERS “hot spots”, and MXenes nanosheets could load aptamer-modified AuNP dimers due to the hydrogen bonding and the chelation between the phosphate groups of aptamers and the Ti ion of MXenes. With the presence of AFB1 preferentially binding to AFB1 aptamer, AuNP dimers were separated from MXenes nanosheets, leading to a decrease in SERS intensity. Regression analysis in the range from 0.001 to 100 ng·mL −1 showed the limit of detection (LOD) being 0.6 pg·mL −1 in standard solution, indicating that the great prospects of the AuNP dimers/MXenes SERS substrate for detecting AFB1.
研究领域:
分析化学
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纳米技术
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食品安全
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）