INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Jin-Feng Jia,Tong Tong Hao,Pei-Hsuan Chen,Feng-Yi Wu,Wei Zhu,Sung-Fu Hung,Nian-Tzu Suen
Herein, we propose a simple yet effective method to deposit metal nanoparticles on Ti3C2Tx-MXene via direct electrosynthesis. Without using any reducing reagent or annealing under reducing atmosphere, it allows the conversion of metal salts (e.g., PtCl4, RuCl3·yH2O, IrCl3·zH2O, AgNO3, and CuCl2·2H2O) to metal nanoparticles with a small particle size (ca. 2 nm). Under these circumstances, it was realized that the support effect from Ti3C2Tx-MXene (electron pushing) is quite profound, in which the Ti3C2Tx-MXene support will act as an electron donor to push the electron to Pt nanoparticles and increase the electron density of Pt nanoparticles. It populates the antibonding state of Pt–Pt bonds as well as the adsorbate level that leads to a “weakening” of the ΔGH* in the optimal position. This rationalizes the outstanding activity of Pt/Ti3C2Tx-MXene (5 wt %, η10 = 16 mV) for the hydrogen evolution reaction (HER). In addition, this direct electrosynthesis method grants the growth of two or multiple types of metal nanoparticles on the Ti3C2Tx-MXene substrate that can perform dual or multiple functions as desired. For instance, one can prepare an electrocatalyst with Pt (2.5 wt %) and Ru nanoparticles (2.5 wt %) on the Ti3C2Tx-MXene support from the same synthetic method. This electrocatalyst (Pt_Ru/Ti3C2Tx-MXene) can display good electrocatalytic HER performance in both acid (0.5 M H2SO4) and alkaline electrolytes (1.0 M KOH).
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Zhiwen Wang,Chuanrui Zhang,Jun Zhang,Jia liang,Zhenguo Liu,Fengling Hang,Yuxue Xuan,Xia Wang,Mengran Chen,Shaowen Tang,Peng-an Zong
Construction of an inorganic/organic superlattice-based film has been proven effective in enhancing thermoelectric (TE) performance as well as flexibility by a variety of mechanisms, typically for two-dimensional (2D) TiS2-based flexible TEs. MXenes, typically, Ti3C2Tx, are a type of 2D material widely investigated in fields of flexible batteries and electromagnetic shielding, among others. However, they have rarely been reported in flexible TEs. One of the key factors is that the surface termination groups (−T) on an MXene could trap electrons, restricting the electronic transport. Herein, −T groups were tailored and substituted by organic ions (−HA) by facile preannealing, exfoliation, and reassembly. The intercalation of −HA introduced Ti–N bonding, forming a flexible MXene/organic superlattice film. The electrical conductivity of the superlattice film was increased by 5 times to 1.6 × 105 S m–1 due to defect reduction as well as the electron injection effect. While the Seebeck coefficient was maintained, the power factor was increased from 4 to 18 μW m–1 K–2. The TE module based on the superlattice film revealed an output power of 7.6 nW at a temperature gap of 50 K. This work opens up an avenue of fabricating flexible MXene-based TE films by tailoring the surface termination group and constructing inorganic/organic superlattice structures.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2020
·Vol. 305
·期 10
·2000343
·
IF 3.853
Qingsen Gao,Mingjie Feng,En Li,Chuntai Liu,Changyu Shen,Xianhu Liu
In this work, a novel nanocomposite is prepared via a melt blending of thermoplastic polyurethane (TPU) and Ti 3 C 2 T x MXene nanosheets pretreated with polyethylene glycol. It is found that the tensile strength and elongation at break increased by 41.2% and 15.4% at MXene loading values of 0.5 wt%. The addition of MXene slightly increases the crystalline speed of TPU, and effectively hinders the transfer of small gas molecules at high temperatures. The storage modulus, loss modulus, and complex viscosity of TPU nanocomposites increase with the increasing MXene content at low frequency. The results demonstrate that the mechanical, thermal, and rheological properties of TPU nanocomposites can be effectively improved by MXene nanomaterials.
研究领域:
材料科学
·
聚合物工程
✓ 已验证
产品关联
DOI
高影响因子
ChemNanoMat
·
2019
·Vol. 6
·期 1
·64-67
·
IF 3.431
Renji Bian,Shanglin Xiang,Dongyu Cai
Graphical Protective coat : A facile route is developed to create a hydrophobic coating for large MXene films based a reaction between a mono-isocyanate and MXene at room temperature. MXenes are a class of two-dimensional transition metal carbides and nitrides with hydrophilic surface. This Communication, for the first time, reports a room temperature-initiated reaction between octadecyl isocyanate and MXene. This provides a facile and scalable route for introducing long alkane chains to the surface of MXene films. The hydrophobic coatings demonstrate strong ability for protecting MXene against degradation in the presence of moisture.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2018
·Vol. 9
·期 2
·310-315
·
IF 5.365
Yuliang Sun,Yuan Sun,Xing Meng,Yu Gao,Yohan Dall'Agnese,Gang Chen,Chunxiang Dall'Agnese,Xiao-Feng Wang
Ti3C2, though one of the most extensively studied 2D MXenes, is rarely reported in dye-sensitized photocatalysis. Platinum is commonly used as a co-catalyst in photocatalytic hydrogen evolution but it increases the cost and hence restricts the commercialization of this technology. Eosin Y (EY) is widely studied in dye-sensitized systems as it is not only low-cost and easily commercially available, but also exhibits excellent visible light absorption ability. Herein, we oxidized Ti3C2 MXene in water at 60 °C for different times, to form TiO2/Ti3C2 on amorphous carbon (AC) composites. The oxidized MXene was used as a photocatalyst in a dye-sensitized system for hydrogen evolution to replace noble metal co-catalysts such as Pt. The highest hydrogen production rate of 33.4 μmol h−1 g−1 was achieved by the TiO2/Ti3C2@AC-48h composite with the sensitization of 1 mM EY, which was 110 times higher than that of oxidized Ti3C2 without EY. This work shows the potential of 2D MXenes used in dye-sensitized photocatalysis for hydrogen evolution.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 3
·1127-1134
·
IF 3.591
Wu Jiajin,Jiamin Zhou,Feng Zhu,Hongyong Wang,Gang Xu
The development of efficient and low-cost sustainable electrocatalytic hydrogen precipitation materials is an effective way to support the reduction of fossil fuel use. In recent years, in order to overcome the problem of the poor electrical conductivity of transition metal chalcogenides (TMCs), carbon-based materials and the MXene family have become popular TMC carriers. In this work, Cu2MoS4/Ti3C2Tx-30% materials with a special structure were synthesized for the first time via a simple and friendly solvothermal method. We successfully grew Cu2MoS4in situ on a MXene (Ti3C2Tx) via solvent heating, and Cu2MoS4/Ti3C2Tx-30% was bonded together by electrostatic adsorption to form a special structure. Its overpotential is 103 mV lower than that of pure Cu2MoS4 at a current density of 10 mA cm−2 in an acidic medium (0.5 M H2SO4). At the same time, under the same conditions, the Tafel slope is 37 mV dec−1 lower than that of pure Cu2MoS4. Critically, the heterostructure retains high catalytic activity within 20 h. All of this is attributed to the special structure of Cu2MoS4/Ti3C2Tx-30%, resulting in increased conductivity, electrochemically active surface area (ECSA), and stability. This provides new ideas for future discoveries relating to the synthesis of non-precious transition metal two-dimensional composites.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 42
·19957-19971
·
IF 4.682
Zhu Beibei,Song Pingan,Li Jingguo,Cao Shaokui,Shi Jun
Photodynamic therapy as an antibiotic-free method could effectively solve the bacterial infection problem and avoid the emergence of multidrug-resistant bacteria. In this paper, Ti 3 C 2 @gold nanorods (GNRs)/PDA nanoparticles with synergistic photodynamic antibacterial properties were obtained by coating PDA on the surface of in situ growth Ti 3 C 2 @GNRs. GNRs growing on the surface of Ti 3 C 2 MXene nanosheets effectively prevented the aggregation of Ti 3 C 2 nanosheets, which ensured the distinct photodynamic antibacterial performance of Ti 3 C 2 . In addition, the introduction of SH-PEG-CH 3 to Ti 3 C 2 @GNRs nanosheets endowed Ti 3 C 2 @GNRs/PDA nanoparticles with good biocompatibility. Furthermore, Ti 3 C 2 @GNRs/PDA nanoparticles possessed synergistically enhanced photodynamic properties, caused by the remarkable photodynamic properties of Ti 3 C 2 MXene and PDA. In addition, with the increase in PDA content, Ti 3 C 2 @GNRs/PDA nanoparticles could produce more 1 O 2 under 660 nm laser irradiation and the minimum inhibitory concentrations of Ti 3 C 2 @GNRs/PDA 50 nanoparticles against E. coli and S. aureus decreased to about 0.07 mg/mL. Thus, this work utilizes the 1 O 2 -generating performance of Ti 3 C 2 MXene and PDA to fabricate Ti 3 C 2 @GNRs/PDA nanoparticles with synergistically enhanced photodynamic antibacterial activities, which is expected to be applied in antibiotic-free antibacterial field. Graphical abstract
研究领域:
材料科学
·
生物医学工程
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Wenjuan Zhang,Yuheng Li,Yaxian Wang,Youliang Wang,Miao Kou,Xiangyue Yang,Qianqian Chu,Kun Zhao
An efficient route is proposed to synthesize a novel three-dimensional (3D) magnetic MXene aerogel (3D MXene/Fe 3 O 4 ). 3D MXene were synthesized by self-assembly of 2D MXene Ti 3 C 2 T x using ethylenediamine (EDA) as crosslinking inducer, then Fe 3 O 4 was in situ coprecipitation onto 3D MXene. 3D MXene/Fe 3 O 4 was applied as an adsorbent for Ag(I) removal from aqueous solutions. 3D MXene/Fe 3 O 4 exhibits a cross-linked 3D porous network with magnetic Fe 3 O 4 nanoparticles uniformly dispersed on its surface and edges. The maximum adsorption capacity of 3D MXene/Fe 3 O 4 for Ag(I) was 2385 mg g −1 . The kinetics and isothermal process during adsorption were described accurately by the pseudo-second-order model and the Freundlich isotherm model, and the adsorption process was driven by chemisorption and multilayer adsorption, where the diffusion mechanism involved surface diffusion and intraparticle diffusion. Furthermore, the 3D MXene/Fe 3 O 4 are recyclable, retaining 71% of the initial removal rate after 5 adsorption/desorption cycles.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 35
·13957-13973
·
IF 4.5
Xu Kaizheng,Ma Yingyi,Yao Shun,Liu Xiaoting
The fabrication and functionalization of three-dimensional (3D) MXene are vital for diverse high-performance applications. Herein, the construction of 3D porous MXene architecture and its functionalization with graphene are synchronously implemented by breath figure method. 3D porous rGO/MXene with multi-scale pores is prepared by simply casting the mixture of GO/surfactant and MXene/surfactant solution under humid environment and the subsequent reduction process. The aggregation inhibition of GO and MXene nanosheets at multi-scale caused by surfactant intercalation and the formation of 3D porous structure, as well as the increase in surface area induced by the introduction of GO, enlarged lamellar spacing and multi-scale porous structure endow porous rGO/MXene with excellent electrochemical performance. The synergy of rGO and MXene leads to further improvement in electrochemical property and its stability. Low detection limit, good anti-interference, repeatability, reproducibility, long-range stability and accuracy of actual sample testing are exhibited when porous rGO/MXene is used for electrochemical detection of DA. Furthermore, the electrochemical performance could be controlled via tuning the porous structure and ratio of GO and MXene. This study not only demonstrates the superiority of porous rGO/MXene toward electrochemical sensing, but also proposes a simple and universal method for controllable construction and functionalization of 3D MXene architecture. Graphical Abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 52
·2413311
·
IF 27.4
Wenkun Fei,Jianmin Li,Linfeng Ma,Tongqing Zhou,Xianjun Zhu,Xingyu He,Shujuan Liu,Jing Bian,Qiang Zhao
The increasingly complex electromagnetic (EM) environment necessitates advanced electrically controllable electromagnetic interference (EMI) shielding materials that can adapt to varying EM conditions. This study develops a flexible electrochemically tunable EMI shielding device based on ultrathin Ti 3 C 2 T x MXene films, exhibiting reversible shielding effectiveness (SE) modulation from 18.9 to 26.2 dB in X band at 0.1 and −1.5 V. Unlike the previously reported mechanism relying on interlayer spacing adjustments, the work leverages transformations of charging state and surface chemistry for tunability during the electrochemical process. The Ti 3 C 2 T x flake size is also evidenced to play a crucial role, with smaller flakes offering higher absorption modulation despite lower SE modulation, enabling the device with high designability. When integrated with Salisbury screen structure, the device achieves adjustable absorption from 93.560% at 0.1 V to 99.996% at −1 V, showing a tunable reflection suppression ratio up to 32 dB with an effective bandwidth of 4.2 GHz. Additionally, incorporating resonant cavity structure enables absorption-dominated (over 90%) microwave-responsive switching at 0.1 and −1.5 V. This work highlights significant potential of adaptive EMI shielding materials for applications in smart electronic protection, EM switch, and radar camouflage.
研究领域:
材料科学
·
电磁学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Yajing Wang,Jiankang Wang,Guokang Han,Chunyu Du,Qihuang Deng,Yunzhi Gao,Geping Yin,Ying Song
Carbon support used in commercial Pt/C commonly suffers from corrosion under harsh electrooxidation environment endowed by anodic potential. An alternative support with superior electric conductivity and stable structure should be developed. Herein, Ti 3 C 2 MXene was synthesized as support to immobilize Pt nanoparticles due to its fascinating stable layered structure, and metallic property. Used as electrocatalyst for methanol oxidation reaction (MOR) and hydrogen evolution reaction (HER) for the first time, as-prepared Pt/Ti 3 C 2 MXene showed much enhanced electrocatalytic activity for methanol oxidation, as unraveled by its peak current density of 1.137 mA/cm 2 , nearly three times larger than that of Pt/C (0.388 mA/cm 2 ). Moreover, it also exhibited long-term stability even running for 2 h. In addition, Pt/Ti 3 C 2 MXene was able to catalyze electrochemical hydrogen evolution reaction (HER) in 0.5 M H 2 SO 4 solution with only 7 mV overpotential at − 10 mA/cm 2 , obviously lower than that of Pt/C (17 mV). The improved MOR and HER activity of Pt/Ti 3 C 2 MXene could be assigned to the unique stable 2D nanosheet structure, excellent electric conductivity, strong binding strength as well as electronic effect between Pt and Ti 3 C 2 MXene. This work widens the application of Ti 3 C 2 MXene in the field of methanol oxidation and hydrogen evolution reaction.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
VIEW
·
2022
·Vol. 3
·期 5
·20220031
·
IF 0
Shenglong Wang,Boling Lan,Yuyu Gao,Yanting Xie,Hanyu He,Da Xiong,Guo Tian,Tao Yang,Junfeng Huang,Yong Ao,Yue Sun,Weiqing Yang,Weili Deng
MXenes have received tremendous attention for flexible electronics owing to their excellent conductivity, water dispersibility, and mechanical flexibility. However, the sediment from the MXene production process is usually discarded as trash, resulting in low utilization. Here, we present a flexible pressure sensor that enables micro-force sensing and efficient utilization of MXene by confining MXene trash among structured MXene electrodes. Benefiting from the synergistic effect of both the confined micro-conical structure and easily changeable space of MXene trash, the as-designed device can detect extremely subtle pressure of 2.9 Pa, deliver a high sensitivity over 4.08 kPa −1 , and exhibit a remarkably fast response time (7 ms). These properties make it suitable for monitoring weak force signals from human wrist pulse and even for detecting dynamic responses associated with acoustic waves. This work provides a reference for the versatile and efficient application of MXene in the same device, showing great potential for sustainable production of next-generation wearable smart electronics.
研究领域:
材料科学
·
柔性电子
·
传感器技术
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）