JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Chang Peng,Xuezhi Li,Peicheng Jiang,Wei Peng,Jianfeng Tang,Ling Li,Lei Ye,Shuaijun Pan,Shu Chen
High-performance adsorption and easy-to-recycle property of adsorbents are desirable in wastewater treatment , and a suitably smart adsorbent with responsive phase separation capacity is promising in this regard. Herein, a thermoresponsive composite system is designed through the combination of transition metal carbides (MXene) and poly(N-isopropylacrylamide) (PNIPAM) for removal of toxic metal ions from water. As a thermoresponsive switch, the PNIPAM endows such composite system with superior thermoresponsiveness (i.e., gel-water phase separation) in water, which facilitates to the control of adsorption. The gel phase triggered by an elevated temperature (e.g., 40 °C) quickly adsorbs toxic metal ions, and then a solid-liquid extraction way is used to conveniently separated the gel phase from water phase for simple removal of toxic metal ions. A very high adsorption capacity (e.g., ~224 mg·g −1 for Cu 2+ ) can be achieved due to the synergistic effects of the composite system. Moreover, the separated gel can be back to a redispersed state at low temperature (e.g., 20 °C), enabling its effective regeneration and recovery. Notably, the PNIPAM as a protective agent prevents the oxidation of MXene so as to retain good stability during the multiple adsorption/desorption cycles. This simple and smart adsorption strategy is great promising for water purification application.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Song-Yi Liao,Shuai-Fu Cui,Yue-Zhu Li,Wei-Xiang Cheng,Xing-Wen Huang,Jing Zhang,Ting-Ting Cui,Xu-Gang Shu,Yong-Gang Min
In this work, the wrinkled, flexible, and layered nitrogen-doped Ti 3 C 2 T x (shorten as N-MXene) is synthesized by using cyanamide as N-dopants. The changeable (002) plane spacing and the attached functional groups of N-MXene are detected by XRD and XPS analyses in details, respectively. The microscopic morphology of N-MXene is characterized by SEM and TEM, which demonstrates its wrinkled and flexible characteristics. When the wrinkled N-MXene being added into the LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) as conductive additive, the attained electrodes obtain enhanced electrochemical performances at the appropriate weight ratio (namely 2.5-N-MXene with 2.5 wt.%). The 2.5-N-MXene delivers “extra” capacity of 226.9 mAh/g at 0.1 C (20 mA/g) current density. The “extra” capacity is assigned to Li ions intercalation/extraction from the wrinkled/flexible/layered N-MXene. Moreover, based on the analyses of CV and dQ/dV curves, the wrinkled/flexible N-MXene additive could effectively inhibit the phase transition of M↔H2 of NCM811 and alleviate the volume change of the particles in the circulation. From DFT simulation, the N-MXene is more capable of preventing Ni/Co/Mn from dissolving and migrating to the negative electrode to form dendrites through adsorption. Therefore, the N-MXene should be a very competitive conductive agent to improve the mechanical and electrochemical properties of high nickel cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhihao Zhang,Hangjun Ying,Pengfei Huang,Shunlong Zhang,Zhao Zhang,TianTian Yang,Wei-Qiang Han
Silicon is an ideal anode candidate for next-generation lithium-ion batteries (LIBs) due to its high specific capacity, low working potential and abundant sources. However, its practical application is seriously hindered by its huge volume expansion, which leads to the destruction of the electrode structure and the short cycle life. Herein, we fabricated flexible self-supporting binder-free porous silicon/MXene-2:1 composite film (pSi/MXene-2:1 film) as anode for LIBs by vacuum filtration. The pSi possesses sheet-shape resulting from layered montmorillonite, which is beneficial to shorten ion transport length. Furthermore, the pSi/MXene-2:1 film possesses excellent mechanical flexibility and the voids in the structure can well accommodate the volume expansion during cycling. Benefitting from these advantages, the pSi/MXene-2:1 film anode shows steady cycling performance with 1039.3 mAh/g at 500 mA g −1 after 200 cycles and excellent rate performance with 840.3 mAh/g at 5 A/g. Furthermore, a high reversible capacity of 1201 mAh/g can be obtained at 1 A/g for pSi/MXene-2:1 || LiFePO 4 full cell. This work provides a strategy to fabricate high-capacity and long-cycle self-supporting silicon-based anodes for flexible LIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Minxia Jiang,Minxi Li,Chang Cui,Jie Wang,Yang Cheng,Yixin Wang,Xing Zhang,Jinwen Qin,Minhua Cao
Ti3C2Tx MXene often suffers from poor lithium storage behaviors due to its electrochemically unfavorable OH terminations. Herein, we propose molecular-level interfacial chemistry regulation of Ti3C2Tx MXene with phytic acid (PA) to directly activate its OH terminations. Through constructing hydrogen bonds (H-bonds) between oxygen atoms of PA and OH terminations on Ti3C2Tx surface, interfacial charge distribution of Ti3C2Tx has been effectively regulated, thereby enabling sufficient ion-storage sites and expediting ion transport kinetics for high-performance energy storage. The results show that Li ions preferably bind to H-bond acceptors (oxygen atoms from PA), and the flexibility of H-bonds therefore renders their interactions with adsorbed Li ions chemically “tunable”, thus alleviating undesirable localized geometric changes of the OH terminations. Meanwhile the H-bond-induced microscopic dipoles can act as directional Li-ion pumps to expedite ion diffusion kinetics with lower energy barrier. As a result, the as-designed Ti3C2Tx/PA achieves a 2.4-fold capacity enhancement compared with pristine Ti3C2Tx (even beyond theoretical capacity), superior long-term cyclability (220.0 mAh g–1 after 2000 cycles at 2.0 A g–1), and broad temperature adaptability (−20 to 50 °C). This work offers a promising interface engineering strategy to regulate microenvironments of inherent terminations for breaking through the energy storage performance of MXenes.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Bowen Fu,Han Man,Jie Zhao,Fei Wang,Fang Fang,Dalin Sun,Yun Song
In all-solid-state batteries, the traditional electrode is assembled with active electrode materials, electronic conductors, and solid electrolytes. This multiple-phase structure with solid–solid contact leads to complicated interface degradations, such as electrolyte decomposition and derived mass/charge transfer obstacle. To ameliorate above issues, the less electrode components are employed, the less interface issue will emerge. Herein, such a conception is implemented by MXene, which not only provides the dual ionic–electronic transport network but also acts as a buffer layer for alleviating volume changes and homogenizing the electric field. The practicability and universality of this multifunctional MXene strategy are verified in intercalation and alloy type anodes, as well as sulfur and selenium cathodes. More excitingly, a thick electrode (∼100 μm) with a high mass loading (16.7 mg cm–2) can even be realized in a germanium/MXene electrode without obvious capacity decay upon cycling. Less MXene turns complexity into simplicity and eventually shows fascinating electrochemical performance in all-solid-state batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
固态离子学
·
先进电池技术
✓ 已验证
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 41
·19579-19585
·
IF 7.233
Zheng Guo,Xiaohua Zhu,Shigong Wang,Chunyang Lei,Yan Huang,Zhou Nie,Shouzhuo Yao
As an emerging two-dimensional material, MXenes have attracted much attention due to their unique physicochemical properties, but their application in biosensing has been lagging far behind because of their poor salt tolerance. Herein, a titanium carbide MXene quantum dot (Ti3C2 QD)-based fluorescent probe for the alkaline phosphatase (ALP) activity assay and embryonic stem cell (ESC) identification was developed by taking advantage of the inner filter effect (IFE). Ti3C2 QDs with ∼4.2 nm in diameter were prepared from Ti3C2 MXenes by hydrothermal treatment, exhibiting excellent salt tolerance, anti-photobleaching and dispersion stability in aqueous solution. Owing to the remarkable overlap between the absorption spectrum of p-nitrophenol (p-NP) and the excitation and emission spectrum of Ti3C2 QDs, p-NP generated from ALP-catalyzed dephosphorylation of the substrate, p-nitrophenyl phosphate (p-NPP), can effectively quench the fluorescence of Ti3C2 QDs through the IFE. As a result, sensitive fluorometric analysis of ALP activity was achieved without complicating the conventional colorimetric ALP detection system. The proposed assay was successfully applied to determine ALP activity with a low limit of detection (0.02 U L−1) as well as monitoring the enzyme activity in real time. Finally, accurate analysis of ALP, the biomarker of ESC, in ESC lysates was also achieved using this IFE-based method, affording an alternative method for ESC identification.
研究领域:
生物传感
·
分析化学
·
细胞生物学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Guangwen Jia,Ao Zheng,Xiao Wang,Lu Zhang,Ling Li,Chenxing Li,Yan Zhang,Lingyan Cao
The evaporation of water occurs ubiquitously on earth. Hence, smart materials that can directly convert signals generated via water stimulation into mechanical motion have attracted wide attention. However, it is still a challenge to develop novel functional materials with fast response, large scale deformation, and long-term stability for moisture-gradient actuators. Here, a flexible, conductive, layer-structured homogenous Ti 3 C 2 T X MXene-graphene oxide (MGO) film-based moisture-driven actuator and humidity sensor were fabricated. The oxygen groups and d-spacing could be effectively adjusted by MXene/GO composition ratio, thereby tuning the actuation performance. MGO 3 (MXene/GO = 3) displayed a large bending angle, and reversible deformation. And the bending speed of MGO 3 is up to 32°s −1 . Furthermore, MGO 3 actuation displayed long-term stability via suppression of MXene oxidation by the introduction of GO and showed good cycling stability. MGO 3 actuators are constructed, which could mimic the blooming of flower, lifting and carrying objects, and be used as a non-contact control switch. In addition, MGO 3 showed a linear sensitive response to humidity and excellent biocompatibility which make it suitable for respiratory monitoring. This work demonstrated that flexible, biocompatibility and conductive MGO films have broad application prospects in the fields of smart actuators, sensing devices, and biology and health care.
研究领域:
材料科学
·
生物医学工程
·
传感技术
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 26
·265501
·
IF 3.874
Shuxian Chen,Min Shi,Quan Xu,Jingkun Xu,Xuemin Duan,Yansha Gao,Limin Lu,Feng Gao,Xiaoqiang Wang,Yongfang Yu
Herein, Ti3C2Tx MXene/N-doped reduced graphene oxide (MXene/N-rGO) composite was employed as the electrocatalyst to construct a new electrochemical sensing platform for the determination of adrenaline (AD). The MXene/N-rGO was synthesized via a facile one-step hydrothermal method, where ethylenediamine acted as a reducing agent and N source. The doped N in rGO served as a bridge between MXene and rGO through tight hydrogen bonds. Scanning electron microscopy showed that large numbers of MXenes with accordion-like morphology were distributed on the surface of the N-rGO. The MXene/N-rGO composite displayed a synergetic catalytic effect for oxidizing AD, originating from the unique catalytic activity of N-rGO and the large surface area and satisfactory conductivity of MXene. These characteristics of composite material led to a remarkable effect on signal amplification for the detection of AD, with a wide linear range from 10.0 nM to 90.0 μM and a low detection limit of 3.0 nM based on a signal to noise ratio of 3. Moreover, the MXene/N-rGO electrode displayed good stability, repeatability, and reproducibility. Additionally, the proposed sensor was successfully applied for voltammetric sensing of AD in urine with recoveries from 97.75% to 103.0%.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 2
·284
·
IF 4.034
Kaiyue Chen,Xiaoya Yan,Junkai Li,Tifeng Jiao,Chong Cai,Guodong Zou,Ran Wang,Mingli Wang,Lexin Zhang,Qiuming Peng
The effective functionalization and self-assembly of MXene are of crucial importance for a broad range of nanomaterial applications. In this work, we investigated the aggregates of sulfanilic acid-modified MXene (abbreviated as MXene-SO3H) with three model dyes at the air–water interface and demonstrated the morphological and aggregation changes of composite films, using Langmuir-Blodgett (LB) technology, as well as excellent uniformity and reproducibility by using surface-enhanced Raman scattering (SERS) spectra. This research has found that cationic dye molecules were adsorbed onto negatively charged MXene-SO3H particles mainly through electrostatic interaction and the particles induced dyes to form highly ordered nanostructures including H- and/or J-aggregates corresponding to monomers in bulk solution. The surface pressure-area isotherms from different dye sub phases confirmed that the stable composite films have been successfully formed. And the spectral results reveal that different dyes have different types of aggregations. In addition, the SERS spectra indicated that the optimal layers of MXene-SO3H/methylene blue (MB) films was 50 layers using rhodamine 6G (R6G) as probe molecule. And the formed 50 layers of MXene-SO3H/MB films (MXene-SO3H/MB-50) as SERS substrate were proved to possess excellent uniformity and repeatability.
研究领域:
材料科学
·
光谱学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Wei Zheng,Peigen Zhang,Li Yang,Jian Chen,Wubian Tian,Yamei Zhang,ZhengMing Sun
We report herein a fast and scalable approach to the synthesis of MO/CNT/Fe (MCI) hybrid nanostructures via microwave irradiation of MXene under ambient condition. The effect of three arcing materials, CNT, graphite (C), and carbon fiber (C f ), on the growth of carbon nanotubes on MXene-derived metal oxides were investigated. The resulted MCI nanostructures were tested as anodes in LIBs , all exhibiting better electrochemical performance than that of pristine Ti 3 C 2 . Remarkably, MCI-C f delivered reversible capacities of 430 mA h g −1 and 175 mA h g −1 at 1 A g −1 and 10 A g −1 , respectively, which is much higher than that of commercial graphite at high rates. The findings in this work open new exciting opportunities to developing hybrid electrode materials with high specific capacity for energy conversion and storage.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yuan Xiang,Jie Li,Jianhua Liu,Junwen Zhou,Shenghui Guo,Jiabin Zeng
NiCoMn-LDH/polyaniline (PANI)/MXene composite materials are prepared via a hydrothermal method. PANI is loaded onto MXene, and NiCoMn-LDH is grown in situ on PANI/MXene. The inherent positive charge in NiCoMn LDH effectively counteracts the self-aggregation tendency of MXene nanosheets and promotes the uniform in-situ growth of NiCoMn lactate dehydrogenase on the surface of PANI loaded MXene. Thus, the composite of NiCoMn-LDH/PANI/MXene boasts exceptional interfacial compatibility and an extensive contact area, facilitating seamless electron and ion transport across redox active centers. The NiCoMn-LDH/MXene/PANI electrode demonstrates remarkable performance, achieving the highest specific capacitance of 416.3 F g −1 at 0.2 A g −1 . Furthermore, it exhibits unparalleled cycling stability, maintaining its capacitance without any decay even after 10,000 cycles at 6 A g −1 . In addition, the assembled CNMP-MX-2//AC boasts a substantial specific capacity of 553.1 F g −1 at 0.2 A g −1 , accompanied by power density of 145.1 Wh·kg −1 and an energy density of 161.5 W kg −1 , showcasing its exceptional performance capabilities. The capacitance does not decay after 10000 cycles. The excellent electrochemical performance indicates that the NiCoMn LDH/MXene/PANI composites used directly as an electrode serves as an effective strategy for enhancing energy storage.
研究领域:
材料科学
·
电化学
·
纳米复合材料
·
能源存储
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 7
·1747-1761
·
IF 6.569
Keding Li,Yuqing Lei,Jun Liao,Yong Zhang
MXene-supported CuO nanocomposites (MCNs) were synthesized through an ice-crystal templating method without using any chemical modifiers. Nano-sized CuO particles were uniformly and stably attached to the surface of MXene nanosheets. The catalysis of the MCNs in ammonium perchlorate (AP) decomposition was studied and the results indicated that the MCNs as catalysts (2 wt%) could significantly decrease the high temperature decomposition (HTD) temperature of AP from 425.0 °C (pure AP) to 324.9 °C (AP with MCNs-3) and increase the exothermic heat from 295.2 J g−1 (pure AP) to 1272.9 J g−1 (AP with MCNs-3). With the increase of the mass ratio, the decomposition temperature decreased at first and then increased. When the ratio of MCNs-3 was 4 wt%, the HTD temperature of AP was reduced by as much as 114.4 °C and the exothermic heat was remarkably increased to 1360.6 J g−1. The high catalytic activity of MCNs-3 for AP thermal decomposition might be owing to the synergistic effect between MXene nanosheets and CuO nanoparticles. In other words, the results proved that the MXene in combination with CuO could be an effective way to enhance the catalytic performance of CuO in AP decomposition, which has potential application value in AP-based composite solid propellants.
研究领域:
材料科学
·
化学工程
·
推进剂技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）