ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Yuxuan Zhang,Jun Luo,Biao Feng,Hongxia Xu,Yuanyuan Sun,Xueyuan Gu,Xin Hu,Mu Naushad,Bin Gao,Hongqiang Ren
MXenes are considered as an emerging class of two-dimensional (2D) adsorbent for various environmental applications. In this work, two different morphologies of Ti 3 C 2 T x MXene (multilayer (ML-Ti 3 C 2 T x ) and delaminated titanium carbide (DL-Ti 3 C 2 T x )) were prepared through mild in situ HF etching and further delamination . The structural differences between the two were explored with a focus on their effects on the performance and mechanism of removing heavy metals from water. In comparison to ML-Ti 3 C 2 T x , DL-Ti 3 C 2 T x had more oxygen-containing functional groups, higher specific surface area (19.713 vs. 8.243 m 2 /g), larger pore volume (0.135 vs. 0.040 cm 3 /g), higher maximum Pb(II) adsorption capacity (77.0 vs. 56.68 mg/g), but lower maximum Cu(II) adsorption capacity (23.08 vs. 55.46 mg/g). Further investigation revealed that the removal of Pb(II) by the MXenes was mainly controlled through electrostatic attraction and surface complexation mechanisms, while Cu(II) was removed mainly through surface reduction by Ti-related groups. Because delamination of ML-Ti 3 C 2 T x increased the surface area and surface functional groups, DL-Ti 3 C 2 T x became a better sorbent for Pb(II) in water. During sonication, however, delamination inevitably led to partial oxidation of Ti 3 C 2 T x nanosheets and thus weakened the reducing ability of DL-Ti 3 C 2 T x for Cu(II) in water. Nevertheless, both ML- and DL-Ti 3 C 2 T x not only exhibited excellent heavy metal adsorption capacity under different solution conditions, but also showed good reusability. Findings of this study indicate that Ti 3 C 2 T x MXenes are promising adsorbents for treating heavy metal pollutants in water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Kaiwen Guo,Le Zhang,Shunjiang Huang,Rongli Fang,Ying Jin,Bingying Li,Yue Wang,Shichang Xu
Within the capacitive deionization (CDI) realm, the two-dimensional (2D) layered material T 3 C 2 T x MXene has drawn lots of attention because of its excellent electrical conductivity, reversible ionic intercalation/deintercalation capacity, and extensive active sites. However, the performance of MXene is compromised by the fact that its surface is susceptible to oxidation by dissolved oxygen and has inherent defects of self-stacking. In this paper, CuNiFe-Prussian blue analogue@MXene (CuNiFe-PBA@MXene) with three-dimensional (3D) coated heterostructure is successfully prepared by the in-situ coprecipitation. CuNiFe-PBA is uniformly coated on the MXene surface as a functional layer to avoid the re-stacking of MXene, to enlarge their layer spacing, and to slow down the damage of MXene by dissolved oxygen. Based on a coated structure constructed by a good combination of dual pseudocapacitive materials, the CuNiFe-PBA@MXene electrode has excellent electrochemical performance (250F g −1 ). The composed MXene//CuNiFe-PBA@MXene hybrid cell in 500 mg/L NaCl has higher desalination capacity (44.94 mg/g), lower energy consumption (0.66 kWh kg −1 ), and excellent desalination capacity retention (93.46 % after 40 adsorption/desorption cycles). Furthermore, the lower oxidation degree of CuNiFe-PBA@MXene after 40 desalination cycles compared to MXene indicates that the constructed 3D heterogeneous structure can protect MXene and slow down the oxidation of MXene by dissolved oxygen.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Yifan Zhang,Wenlong Pan,Yuliao Dong,Jianning Ding,Lin Xu
Conductive hydrogels have emerged as significant materials within the domain of soft electronics, attributed to their remarkable stretchability, high sensitivity, and rapid response characteristics. In this study, we successfully developed a novel conductive hydrogel, named NAM, which integrates MXene nanosheets into a P(NIPAm-AAc) network to create a dynamic crosslinked structure. This NAM hydrogel exhibits exceptional mechanical properties, including a tensile strength exceeding 1400% and the ability to adhere to objects of different materials. It also demonstrates satisfactory electrical conductivity (0.233 S/m) and high sensitivity (GF=3.384), with rapid response and recovery time of 60 ms. The NAM hydrogel sensors are capable of detecting a wide range of strains (0-800%) and maintaining excellent repeatability in cyclic loading-unloading. They can effectively monitor subtle facial micro-expressions, laryngeal vocalizations, and human motion data, and can be integrated into soft robotic systems for enhanced functionality. The findings suggest significant potential applications for the NAM hydrogel in soft robotics, flexible electronic skin, smart health monitoring, and biomedicine, highlighting its multifunctional capabilities in the realm of soft electronics.
研究领域:
材料科学
·
生物医学工程
·
软体机器人
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Krishnamoorthy Rajavel,Shuyi Shen,Tao Ke,Daohui Lin
The present study addresses the establishment of a highly reactive catalyst derived from Ti 3 C 2 T x (MXene), which is a graphitic carbon-supported TiO 2 hybrid nanostructure for photocatalytic and bacteriostatic applications. The graphitic carbon-supported TiO 2 nanoparticles, which were placed onto a Ti 3 C 2 T x backbone as ternary hybrids under the controlled oxidation of isopropylamine delaminated Ti 3 C 2 T x , were demonstrated to be semiconducting nanostructures. Beneficially, the oxygen-related vacancies in TiO 2 along with graphitic carbon support in the metallic Ti 3 C 2 T x heterostructures exhibited distinct methylene blue dye degradation under UV irradiation at a rate constant of ( k ) of 0.035 ± 0.003 min −1 . The demonstrated superior catalytic performance of the assembled hybrid structure was attributed to the formation of multiple interfacial junctions formed by graphitic carbon, TiO 2 nanoparticles, and Ti 3 C 2 T x , which created distinct intermediate energy levels for electron-hole pair separation and improved the catalytic performance. The synthesized hybrid nanostructures also exhibited excellent antibacterial activity; approximately 97.4% of E. coli was killed by the nanostructures under light exposure due to the excessive radicals that caused oxidative stress on bacterial cells. The developed hybrid nanostructures from the controlled oxidation of delaminated Ti 3 C 2 T x are expected to be superior materials for photocatalytic and bacteriostatic applications.
研究领域:
材料科学
·
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Yafeng Chen,Heliang Yao,Fantao Kong,Han Tian,Ge Meng,Shuize Wang,Xinping Mao,Xiangzhi Cui,Xinmei Hou,Jianlin Shi
Oxygen evolution reaction (OER) is a pivotal electrochemical reaction process for many renewable energy technologies. Due to the sluggish OER kinetics, searching for efficient low-cost non-precious metal catalysts is one of the crucial but very challenging steps. Herein, V 2 C MXene synergistically coupled with hypophosphite-intercalated FeNi (oxy)hydroxide (H 2 PO 2 − /FeNi-LDH-V 2 C) electrocatalyst is synthesized. The H 2 PO 2 − /FeNi-LDH-V 2 C exhibits excellent OER performance with an overpotential of 250 mV (η 10 ) and small Tafel slope of 46.5 mV dec −1 in 1.0 M KOH electrolyte, and excellent rechargeable Zn-air battery performance with superior open circuit potential (1.42 eV), power density (137 mW cm −2 ) and well durability. The strong interaction and electronic coupling with prominent charge-transfer between FeNi-LDHs and V 2 C MXene endow the composite significant OER performance and structural stability, and the adsorption/desorption balance for the OER reaction pathway, eventually promoting the intrinsic activity. This work demonstrates the great promise of MXene-based nanohybrids as advanced electrocatalysts for renewable energy applications.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 15
·4890
·
IF 4.927
Xin Tao,Linlin Zhang,Xuedong He,Lingzi Fang,Hongyan Wang,Li Zhang,Lianghao Yu,Guang Zhu
Flexible supercapacitors (FSCs) are limited in flexible electronics applications due to their low energy density. Therefore, developing electrode materials with high energy density, high electrochemical activity, and remarkable flexibility is challenging. Herein, we designed nitrogen-doped porous MXene (N-MXene), using melamine-formaldehyde (MF) microspheres as a template and nitrogen source. We combined it with an electrospinning process to produce a highly flexible nitrogen-doped porous MXene nanofiber (N-MXene-F) as a self-supporting electrode material and assembled it into a symmetrical supercapacitor (SSC). On the one hand, the interconnected mesh structure allows the electrolyte to penetrate the porous network to fully infiltrate the material surface, shortening the ion transport channels; on the other hand, the uniform nitrogen doping enhances the pseudocapacitive performance. As a result, the as-assembled SSC exhibited excellent electrochemical performance and excellent long-term durability, achieving an energy density of 12.78 Wh kg−1at a power density of 1080 W kg−1, with long-term cycling stability up to 5000 cycles. This work demonstrates the impact of structural design and atomic doping on the electrochemical performance of MXene and opens up an exciting possibility for the fabrication of highly FSCs.Keywords:flexible supercapacitors;nitrogen-doped 3D MXene;electrospinning
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Hua He,Zhiguang Guo
Superhydrophobic conductive materials have gained more attention due to their broad applications in oil–water separation, electromagnetic shielding, and wearable heaters. With their inherent softness and breathability, fabrics are an excellent choice for wearable heater substrates. In this work, we decorate MXene(Ti 3 C 2 T x ) and Polypyrrole (PPy) on the surface of the fabric fibers by adopting a simple method of dip-coating and in situ growth. The surface is modified with polydimethylsiloxane (PDMS) to obtain a superhydrophobic conductive fabric (MXene@PPy/PDMS fabric). The MXene@PPy/ PDMS fabric retains the original softness and breathability of the fabric and has excellent electrical conductivity, outstanding superhydrophobicity, good chemical stability, and mechanical durability. In addition, it also exhibits excellent electrical and photothermal heating performance. Impressively, arising from the superior Joule heating capacity and photothermal conversion performance, the Mxene@PPy/PDMS fabric also proves excellent dewatering and deicing capacity. As one of the promising applications, the Mxene@PPy/PDMS fabric exhibits the effectiveness and feasibility of hyperthermia, heat retention, and deicing.
研究领域:
材料科学
·
能源技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Huanhuan Zhang,Qunying Sun,Linyan Bian,Qiuming Peng,Shumin Han,Baozhong Liu,Yanping Fan
Developing noble-based catalysts with high activity is the key to realizing high-efficiency hydrogen generation. Herein, PdRh alloys with different ratios supported on active Ti 3 C 2 is designed by microwave-assisted reduction to enhance the dissociation of NH 3 BH 3 and H 2 O. Specially, Pd 1 Rh 4 /Ti 3 C 2 conveys an optimal turnover frequency ( TOF ) of 338 min −1 and activation energy ( E a ) of 33.8 kJ mol −1 at room temperature. The TOF of Pd 1 Rh 4 /Ti 3 C 2 is 7.3 times than that of Pd/Ti 3 C 2 and 4.8 times of Rh/Ti 3 C 2 because of the construction of dual-active sites of PdRh alloy and active Ti 3 C 2 . The introduction of a small number of Pd changes the chemical environment of catalysts and presents significant excitation effect on catalytic activity. Experimental investigation reveals PdRh alloy and active Ti 3 C 2 are beneficial for the adsorption and dissociation of NH 3 BH 3 and H 2 O (active Ti 3 C 2 activates H 2 O, PdRh activates NH 3 BH 3 ). This research provides experimental foundation for the design of noble-based catalysts with high catalytic activity.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Fan Zhao,Yaning Zhang,Siqi Gong,Huiting Xu,Junjie Qi,Honghai Wang,Chunli Li,Wenchao Peng,Jiapeng Liu
Capacitive deionization (CDI) is perceived as a promising technology for freshwater production owing to its environmentally friendly nature and low energy consumption. To date, the development of high-performance electrode materials represents the foremost challenge for CDI technology. In this work, the porous bismuthene/MXene (P-Bi-ene/MXene) heterostructure was synthesized using a simple interfacial self-assembly method with two-dimensional (2D) bismuthene and Ti 3 C 2 T x MXene . Within the P-Bi-ene/MXene heterostructure, the porous structure can increase the active site and facilitate ion transport. Simultaneously, MXene effectively enhances the conductivity of the heterostructure, resulting in accelerating electron transport. Due to these attributes, the P-Bi-ene/MXene heterostructure demonstrates high desalination capacity (90.0 mg/g), fast desalination rate, and good cycling performance. The simple self-assembly strategy between 2D/2D materials described herein may offer inspirations for the synthesis of innovative electrode materials with high performance.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2024
·Vol. 11
·期 23
·2309171
·
IF 14.3
Xuefeng Zhang,Xudong Liu,Qingqiang Liu,Yufa Feng,Si Qiu,Ting Wang,Huayu Xu,Hao Li,Liang Yin,Hui Kang,Zhimin Fan
Enabling materials to undergo reversible dynamic transformations akin to the behaviors of living organisms represents a critical challenge in the field of material assembly. The pursuit of such capabilities using conventional materials has largely been met with limited success. Herein, the discovery of reversible constrained dissociation and reconfiguration in MXene films, offering an effective solution to overcome this obstacle is reported. Specifically, MXene films permit rapid intercalation of water molecules between their distinctive layers, resulting in a significant expansion and exhibiting confined dissociation within constrained spaces. Meanwhile, the process of capillary compression driven by water evaporation reinstates the dissociated MXene film to its original compact state. Further, the adhesive properties emerging from the confined disassociation of MXene films can spontaneously induce fusion between separate films. Utilizing this attribute, complex structures of MXene films can be effortlessly foamed and interlayer porosity precisely controlled, using only water as the inducer. Additionally, a parallel phenomenon has been identified in graphene oxide films. This work not only provides fresh insights into the microscopic mechanisms of 2D materials such as MXene but also paves a transformative path for their macroscopic assembly applications in the future.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 37
·25545-25556
·
IF 10.7
Tairan Wang,Hengzhi Zhang,Shengwei Tang,Chunyang Jia
In the modern battlefield, the use of multi-spectral detection techniques that combine the use of infrared and radar bands is prevalent, making the survivability of high-value targets poor. Consequently, there is an urgent need to develop materials that can withstand multi-spectral detection. Here, a multifunctional aerogel composite of hyperbranched gel (HPY) and MXene (Ti3C2Tx) is proposed to simultaneously resist multi-spectral detection. The surface of the aerogel has aligned porous walls, which gives the aerogel excellent thermal insulation, with a surface temperature of only 45.2 °C after being kept on a hot platform at 200 °C for 420 min. Most importantly, the aerogel exhibits a double absorption peak with a minimum reflection loss of −55.05 dB at 4.26 GHz and −49.43 dB at 16.68 GHz. Most notably, the widest effective absorption bandwidth (EAB) reaches 8.1 GHz with a matched thickness of only 1.7 mm. The incorporation of HPY alters the internal pore size of the aerogel, thereby developing an internal thermal insulation structure. Furthermore, the parallel hollow walls on the surface of the aerogel permit electromagnetic waves to enter the interior, while the composite structure endows the aerogel with multiple electromagnetic wave loss mechanisms.
研究领域:
材料科学
·
国防技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Chuanrui Zhang,Peng-an Zong,Zesheng Ge,Yeming Ge,Jun Zhang,Yujian Rao,Zhenguo Liu,Wei Huang
Respiration rate (RR) holds a pivotal status as a vital sign, with its deviation serving as a significant marker for grave clinical occurrences. Contemporary methods for RR detection involve the utilization of complex and costly apparatus, potentially disrupting the innate breathing process. An imperative arises for the development of wearable respiratory sensors that exhibit attributes of cost-effectiveness and efficiency. This study introduces a pioneering investigation featuring an MXene/CNT/PEDOT:PSS composite film , which leverages the thermoelectric effect for sensing RR. After integrating with heart rate monitoring, real-time human health surveillance becomes achievable. Additionally, a notable enhancement in tensile strength by a factor of 2.4 is observed, along with an improved electromagnetic shielding efficiency of 59 dB, representing a 1.5-fold increase, as well as a commendable self-heating capability. The construction of the brick-mortar-structured MXene-based film shows promising potential for respiration sensing, offering additional healthcare functions such as electromagnetic shielding and self-heating. This innovation expands the application scope of MXene within the sensor field, contributing to the advancement of healthcare technologies.
研究领域:
生物医学工程
·
智能健康监测
·
纳米材料医学应用
·
转化医学
·
柔性电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）