MATERIALS & DESIGN
·
2016
·
IF 3.997
Aihu Feng,Yun Yu,Yong Wang,Feng Jiang,Yang Yu,Le Mi,Lixin Song
MXene , a new family of 2D materials , possesses excellent electrical conductivity and hydrophilicity . To date, the majority of MXenes are only successfully produced by exfoliating the MAX phases with high concentration hydrofluoric acid (HF). In this study, the 2D MXene Ti 3 C 2 with larger interplanar spacing was successfully obtained by etching Ti 3 AlC 2 with bifluoride (NaHF 2 , KHF 2 , NH 4 HF 2 ) in single-stage process. The morphology, structure and element composition of prepared Ti 3 C 2 samples were characterized by scanning electron smicroscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive spectrometer (EDS). The synthesis mechanism of Ti 3 C 2 was elaborately demonstrated. The possible reaction equations between Ti 3 AlC 2 and different bifluorides were generalized, indicating the formation of hydrosoluble by-products of Na 3 AlF 6, K 3 AlF 6 and (NH 4 ) 3 AlF 6 . This work presents a safely effective method to synthesize the 2D nanocrystals MXene.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2014
·
IF 4.287
Dandan Sun,Mingshan Wang,Zhengyang Li,Guangxin Fan,Li-Zhen Fan,Aiguo Zhou
Two-dimensional (2D) Ti 3 C 2 was synthesized by the exfoliation of Ti 3 AlC 2 with HF solution and subsequently intercalation with dimethyl sulfoxide . As anode for lithium ion batteries , Ti 3 C 2 after intercalation had an obvious higher capacity than that before intercalation. The capacity can be 123.6 mAh g − 1 at 1C rate with a coulombic efficiency of 47%. It is higher than that of 2D Ti 2 C and close to the theoretical capacity of Ti 3 C 2 with F termination. It was suggested that MXene with pure F groups may be a way to further improve its Li storage performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Yuyao Zhang,Wen Chen,Min Zhou,Guobin Miao,Yueli Liu
Photoreduction of CO2 into useable hydrocarbon fuels has been widely used in the energy conversion field. However, the high carrier recombination rate and the low conversion efficiency of as-prepared catalysts greatly restrict their photocatalytic application. Herein, we synthesize Ti3C2/CsPbBr3 quantum dot (Ti3C2/CsPbBr3 QD) composites by the method of self-assembly, which are used in the photoreduction of CO2. As a result, Ti3C2/CsPbBr3 QD composites exhibit excellent photocatalytic activity and stability for the photocatalytic CO2 reduction. Especially, the generation rate of CO (17.98 μmol h–1 g–1) for Ti3C2/CsPbBr3 QD composites is 9.37 times higher than that of CsPbBr3 QDs (1.92 μmol h–1 g–1), and 97.35% of the activity is still retained after three consecutive cycles. The improved photocatalytic performance is mainly attributed to the construction of the type II-2 heterojunction as the built internal electric field (IEF) in the p–n junction could accelerate the separation for both photoinduced holes and electrons. Therefore, this work provides an insight into the construction of heterojunction photocatalysts with halide perovskite QD materials for photocatalytic applications.
研究领域:
材料科学
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能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Ligang Ma,Le Xu,Yihuan Ding,Chao Lin,Yuqing Yang,Xiaoqian Ai
Reasonable design and preparation of effective interface engineering to accelerate charge transfer is the key to achieve the improvement of heterojunction photocatalysts. In this study, a Ti 3 C 2 -MoS 2 -ZnIn 2 S 4 (TMZ) heterojunction was designed and successfully synthesized by sequentially growing MoS 2 and ZnIn 2 S 4 layered structures on highly conductive Ti 3 C 2 using a two-step hydrothermal method. This configuration effectively separated photogenerated carrier, thereby improving the efficiency of photocatalytic hydrogen production. The effects of the amount of Ti 3 C 2 -MoS 2 on the microstructure, morphology, optical properties and photocatalytic H 2 production of TMZ heterojunctions were investigated. Results demonstrated that Ti 3 C 2 , MoS 2 , and ZnIn 2 S 4 intricately interpenetrated to form a tightly bound TMZ heterojunction with a well-defined heterojunctions interface. This interface is beneficial for the separation of photogenerated carriers, thereby boosting the photocatalytic performance. The dynamic process of carrier separation was investigated in detail using photocurrent measurements, EIS Nyquist plots, photoluminescence, and fluorescence lifetime analysis. Additionally, compared to pristine ZnIn 2 S 4 , the absorption edge of TMZ sample exhibited a redshift, indicating an expanded absorption range in the visible spectrum. Finally, the mechanism by which TMZ enhances the efficiency of photocatalytic H 2 production is thoroughly analyzed.
研究领域:
材料科学
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能源科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Yusi Peng,Ping Cai,Lili Yang,Yingying Liu,Linfeng Zhu,Qiuqi Zhang,Jianjun Liu,Zhengren Huang,Yong Yang
Recent advances in MXenes with high carrier mobility show great application prospects in the surface-enhanced Raman scattering (SERS) field. However, challenges remain regarding the improvement of the SERS sensitivity. Herein, an effective strategy considering charge-transfer resonance for semiconductor-based substrates is presented to optimize the SERS sensitivity with the guidance of the density functional theory calculation. The theoretical calculation predicted that the excellent SERS enhancement for methylene blue (MeB) on Ti3C2 MXene can be excited by both 633 and 785 nm lasers, and the Raman enhanced effect is mainly originated from the charge-transfer resonance enhancement. In this work, the Ti3C2 MXenes exhibit an excellent SERS sensitivity with an enhancement factor of 2.9 × 106 and a low detection limit of 10–7 M for MeB molecules. Furthermore, the SERS enhancement of Ti3C2 and Au–Ti3C2 substrates exhibit higher selectivity on different molecules, which contributes to the detection of target molecules in complex solution environments. This work can provide some theoretical and experimental basis for the research on SERS activity of other MXene materials.
研究领域:
材料科学
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纳米技术
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分析化学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Yanping Fan,Dandan Chen,Xianyun Liu,Guangxin Fan,Baozhong Liu
Two-dimensional layered material of Ti 3 C 2 has been used to improve the hydrogen desorption properties of LiBH 4 . The results of temperature-programmed dehydrogenation (TPD) and isotherm dehydrogenation (TD) demonstrate that adding the Ti 3 C 2 contributes to the hydrogen storage performance of LiBH 4 . The dehydrogenation temperature decreases and the dehydrogenation rate increases with increasing the adding amounts of Ti 3 C 2 . The onset dehydrogenation temperature of LiBH 4 + 40 wt% Ti 3 C 2 composite is 120 °C and approximately 5.37 wt% hydrogen is liberated within 1 h at 350 °C. Furthermore, the activation energy of LiBH 4 + wt.% Ti 3 C 2 is also greatly reduced to 70.3 kJ/mol, much lower than that of pure LiBH 4 . The remarkable dehydrogenation property of the LiBH 4 + 40 wt% Ti 3 C 2 may be due to the layered active Ti-containing Ti 3 C 2 and the high surface area of MXene .
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 34
·345603
·
IF 3.551
Tao Ke,Shuyi Shen,Kun Yang,Daohui Lin
Constructing effective heterojunctions between semiconductors and appropriate cocatalysts and exposing highly active crystal facets have been considered an effective approach to obtain efficient photocatalysts. Herein, a novel BiOI/(001)TiO2/Ti3C2 (BTT) hybrid was for the first time synthesized by in situ growing (001)TiO2 nanosheets on a 2D MXene nanomaterial (Ti3C2) and subsequent deposition of flower-like nanoflake BiOI on the obtained (001)TiO2/Ti3C2 hybrid. The BTT hybrid exhibited excellent photocatalytic performance for degradation of Rhodamine B under visible light irradiation, with the highest degradation rate being 6.26, 1.72, and 1.35 times of that of a pure BiOI, BiOI/TiO2 hybrid, and BiOI/Ti3C2 hybrid, respectively. The staggeringly enhanced photoactivity of BTT was attributed to the separation of photogenerated carriers by a multiple charge transfer channels because of the formed p-n and Schottky double junctions. This study demonstrates that (001)TiO2/Ti3C2 obtained by simple hydrothermal oxidation of Ti3C2 can be a good cocatalyst for fabricating excellent visible-light-driven photocatalyst.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2019
·
IF 1.859
Shaogang Liu,Libo Wang,Xiaolong Wang,Lu Liu,Aiguo Zhou,Xinxin Cao
In this study, Ti 3 C 2 was delaminated into 2D single or few monolayers-thick nanomaterials (d-Ti 3 C 2 ) by DMSO intercalation and sonication method. Then, d-Ti 3 C 2 /polyvinyl alcohol (PVA) films were prepared by solution casting process. The structures, thermal stabilities, thermal behaviors, and surface properties of the resulting materials were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR). Furthermore, the experimental results showed improvements in mechanical and thermal characteristics of d-Ti 3 C 2 /PVA films, as compared to those of pure PVA. The addition of d-Ti 3 C 2 had beneficial effects on the tensile strength , elongation at break, modulus of elasticity , thermal stability, and crystallinity of PVA matrix. With 0.5 wt% of d-Ti 3 C 2 , d-Ti 3 C 2 /PVA composite exhibited the best comprehensive properties.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaoqi Mao,Yongjin Zou,Fen Xu,Lixian Sun,Hailiang Chu,Huanzhi Zhang,Jian Zhang,Cuili Xiang
The three-dimensional (3D) architecture of electrode materials with excellent stability and electrochemical activity is extremely desirable for high-performance supercapacitors. In this study, we develop a facile method for fabricating 3D self-supporting Ti3C2 with MoS2 and Cu2O nanocrystal composites for supercapacitor applications. MoS2 was incorporated in Ti3C2 using a hydrothermal method, and Cu2O was embedded in two-dimensional nanosheets by in situ chemical reduction. The resulting composite electrode showed a synergistic effect between the components. Ti3C2 served as a conductive additive to connect MoS2 nanosheets and facilitate charge transfer. MoS2 acted as an active spacer to increase the interlayer space of Ti3C2 and protect Ti3C2 from oxidation. Cu2O effectively prevented the collapse of the lamellar structure of Ti3C2–MoS2. Consequently, the optimized composite exhibited an excellent specific capacitance of 1459 F g–1 at a current density of 1 A g–1. Further, by assembling an all-solid-state flexible supercapacitor with activated carbon, a high energy density of 60.5 W h kg–1 was achieved at a power density of 103 W kg–1. Additionally, the supercapacitor exhibited a capacitance retention of 90% during 3000 charging–discharging cycles. Moreover, high mechanical robustness was retained after bending at different angles, thereby suggesting significant potential applications for future flexible and wearable devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2025
·
IF 3.4
Qi Shi,Siqi Huang,Qi Xi,Yanan Niu,Nuan Wen,Libo Du,Yuguang Lv,Tai Peng
In this study, Ti 3 C 2 quantum dots (QDs) were prepared via a simple hydrothermal method and loaded onto binary catalytic materials to construct ternary PTCN/SnS 2 /Ti 3 C 2 QDs composites for enhancing photocatalytic performance. The materials were characterized using techniques such as XRD, TEM, FT-IR, UV–vis, BET, XPS, and PL. The results showed that Ti 3 C 2 QDs were uniformly dispersed on the surface of PTCN/SnS 2 , forming a stable heterostructure. The specific surface area increased to 68.847 m 2 /g (5.6 times higher than that of PTCN), the visible light absorption edge redshifted to 532 nm, and the band gap narrowed to 2.1 eV. Under visible light, the composite exhibited degradation rates of 90.53 %, 79.53 %, 81.23 %, and 85.62 % for norfloxacin, pefloxacin, enrofloxacin, and ciprofloxacin, respectively. At the optimal doping amount (k = 0.0408 min −1 ), the catalytic activity was 6.21 times that of pure PTCN and 2.87 times that of PTCN/SnS 2 . Cyclic experiments demonstrated excellent stability of the composite, with a degradation rate remaining at 86 % after 5 cycles. This study is the first to construct the PTCN/SnS 2 /Ti 3 C 2 QDs ternary system and propose a Z-scheme charge transfer mechanism, providing new insights for the design of high-efficiency photocatalytic materials.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
催化
·
化学工程
✓ 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
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Xiaomeng Li,Shuxue Zhou
The application of MXene in anticorrosion coatings has attracted recent research interest. Limited information exists on the effect of MXene functionalization on anticorrosion performance. In this work, epoxy-functionalized Ti 3 C 2 nanosheets (E-Ti 3 C 2 ) were prepared by grafting with (3-glycidyloxypropyl) trimethoxysilane and incorporated into solvent-borne epoxy coatings with low mass fractions of 0.3 wt%, 0.5 wt% and 0.7 wt%. The anticorrosion properties of the coatings were investigated by electrochemical impedance spectroscopy and salt spray tests. The highest impedance was achieved for the 0.5 wt% E-Ti 3 C 2 coating, at nearly three orders of magnitude higher than a pure epoxy coating. In contrast, the coating with unmodified Ti 3 C 2 yielded an impedance improvement of approximately one order of magnitude. Salt spray tests manifested the same anticorrosion results. The enhanced anticorrosion improvement by epoxy-functionalization should result from the better dispersibility and chemical bonding between the E-Ti 3 C 2 and matrix. The mechanical properties and adhesion force of the coatings were also evaluated. A better scratch resistance, higher adhesion force and reduced flexibility resulted after E-Ti 3 C 2 incorporation.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）