Chemosensors
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2023
·Vol. 11
·期 4
·258
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IF 4.2
Baoyu Huang,Xinwei Tong,Xiangpeng Zhang,Qiuxia Feng,Marina N. Rumyantseva,Jai Prakash,Xiaogan Li
In this work, MXene/NiO-composite-based formaldehyde (HCHO) sensing materials were successfully synthesized by an in situ precipitation method. The heterostructures between the MXene and NiO nanoparticles were verified by transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The HCHO sensing performance of the MXene/NiO-based chemiresistive-type sensors was investigated. Compared to pure MXene and NiO materials, the sensing performance of the MXene/NiO-P2-based sensor to HCHO gas at room temperature was significantly enhanced by the formation of MXene/NiO heterojunctions. The response of the MXene/NiO-P2 sensor to 50 ppm HCHO gas was 8.8, which was much higher than that of the pure MXene and NiO. At room temperature, the detectable HCHO concentration of the MXene/NiO-P2-based sensor was 1 ppm, and the response and recovery time to 2 ppm HCHO was 279 s and 346 s, respectively. The MXene/NiO-P2 sensor also exhibited a good selectivity and a long-term stability to HCHO gas for 56 days. The in situ Fourier transform infrared (FTIR) spectra of the MXene/NiO-P2 sensor, when exposed to HCHO gas at different times, were investigated to verify the adsorption reaction products of HCHO molecules.Keywords:chemiresistive-type formaldehyde sensor;MXene/NiO;heterojunctions;room temperature
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 31
·1801511
·
IF 13.325
Jie Shen,Guozhen Liu,Yufan Ji,Quan Liu,Long Cheng,Kecheng Guan,Mengchen Zhang,Gongping Liu,Jie Xiong,Jian Yang,Wanqin Jin
2D materials' membranes with well-defined nanochannels are promising for precise molecular separation. Herein, the design and engineering of atomically thin 2D MXene flacks into nanofilms with a thickness of 20 nm for gas separation are reported. Well-stacked pristine MXene nanofilms are proven to show outstanding molecular sieving property for H 2 preferential transport. Chemical tuning of the MXene nanochannels is also rationally designed for selective permeating CO 2 . Borate and polyethylenimine (PEI) molecules are well interlocked into MXene layers, realizing the delicate regulation of stacking behaviors and interlayer spacing of MXene nanosheets. The MXene nanofilms with either H 2 - or CO 2 -selective transport channels exhibit excellent gas separation performance beyond the limits for state-of-the-art membranes. The mechanisms within these nanoconfined MXene layers are discussed, revealing the transformation from “diffusion-controlled” to “solution-controlled” channels after chemical tuning. This work of precisely tailoring the 2D nanostructure may inspire the exploring of nanofluidics in 2D confined space with applications in many other fields like catalysis and energy conversion processes.
研究领域:
材料科学
·
纳米技术
·
膜分离技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yujie Qiang,Boyuan Ran,Minjiao Li,Qian Xu,Jian Peng
MXene flakes shows the great potential in corrosion protection area owing to their lamellar structure and remarkable mechanical features. However, these flakes are highly susceptible to oxidation, which results in their structure degradation and restrict their application in anti-corrosion field. Herein, graphene oxide (GO) was used to functionalize Ti 3 C 2 T x MXene through Ti O C bonding to fabricate GO-Ti 3 C 2 T x nanosheets, which proved by Raman, X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FT-IR). GO-Ti 3 C 2 T x nanosheet inclusion into the epoxy coating and their corrosion performance in 3.5 wt.% NaCl solution with 5 MPa pressure was evaluated through electrochemical techniques including open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) along with salt spray. Results indicated that GO-Ti 3 C 2 T x /EP presented superior anti-corrosion capability, the impedance modulus at low frequency (|Z| 0.01 Hz ) was above 10 8 Ω cm 2 after 8 days’ immersion in 5 MPa environment, which was 2 orders of magnitude higher than that of the pure epoxy coating. Scanning electron microscope (SEM) and salt spray images demonstrated that the epoxy coating loaded with GO-Ti 3 C 2 T x nanosheet could provide robust corrosion protection for Q235 steel via the physical barrier effect.
研究领域:
材料科学
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腐蚀与防护
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表面工程
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Xuan Fei,Yingjie Wang,Penglei Guo,Jinggang Wang,Guyue Wang,Guangming Lu,Weiwei Zhao,Xiaoqing Liu
Polyethylene terephthalate (PET) is one of the most widely used polymers for beverage packaging and fibers, with antimony-based catalysts currently dominating its synthesis. However, concerns about potential safety hazards associated with antimony leaching necessitate the development of environmentally benign catalysts free from heavy metals. In this work, we report the first-time utilization of Ti3C2Tx MXene as a polycondensation catalyst of PET. The intrinsic viscosity of Ti3C2Tx MXene-catalyzed PET could reach 0.78 dL/g within 2.1 h, which demonstrated a superior catalytic efficiency compared to antimony trioxide (Sb2O3). Moreover, Ti3C2Tx MXene exhibited a satisfactory performance not only in PET synthesis but also in the production of polypropylene terephthalate (PPT) and polybutylene terephthalate (PBT), thereby confirming its universality in polyester catalysis. The catalytic activity of Ti3C2Tx MXene in polycondensation reactions was attributed to the presence of strong Lewis acid sites, as supported by surface examinations and computational studies. Notably, Ti3C2Tx MXene-catalyzed PET exhibited satisfied crystallizability, as confirmed by the short crystallization half-time of only 6.9 s at 185 °C, signifying a high crystallization rate. This work highlights the potential applications of this thriving 2D material in polyester catalysis and, more importantly, provides a new perspective for the exploration and design of efficient and environmentally friendly catalyst/nucleation agents for polyester synthesis.
研究领域:
材料科学
·
催化化学
·
高分子化学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Daliang Xu,Xuewu Zhu,Xinsheng Luo,Yuanqing Guo,Yatao Liu,Liu Yang,Xiaobin Tang,Guibai Li,Heng Liang
The demand for thin-film composite (TFC) nanofiltration membranes with superior permeance and high rejection is gradually increasing for seawater desalination and brackish water softening. However, improving the membrane permeance remains a great challenge due to the formation of excrescent polyamide in the substrate pores and thick polyamide film. Herein, we fabricated a high-performance TFC nanofiltration membrane via a classical interfacial polymerization reaction on a two-dimensional lamellar layer of transition-metal carbides (MXene). The MXene layer promoted the absorption of the reactive monomer, and higher amine monomer concentration facilitated the self-sealing and self-termination of interfacial polymerization to generate a thinner outer polyamide film from 68 to 20 nm. The almost nonporous lamellar interface inhibited the formation of inner polyamide in the substrate pores. In addition, the MXene lamellar layer could be eliminated by mild oxidation after interfacial polymerization to avoid imparted additional hydraulic resistance. The resulting TFC membrane conferred a high rejection above 96% for Na2SO4 and excellent permeance of 45.7 L·m–2·h–1·bar–1, which was almost 4.5 times higher than that of the control membrane (10.2 L·m–2·h–1·bar–1). This research provides a feasible strategy for fabricating a high-performance nanofiltration membrane using two-dimensional nanosheets as a templated interface.
研究领域:
材料科学
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环境工程
·
膜技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yingyi Ma,Kaizheng Xu,Xiaoting Liu,Shun Yao,Xinzheng Li,Yu Si,Xinran Li
3D architectures of conductive polymer, especially PEDOT hold great promise in energy storage and conversion fields. However, the facile construction of 3D PEDOT and its functionalization have still been challenges due to its poor processability. Herein, the fabrication of 3D porous PEDOT:PSS and its functionalization with MXene are realized synchronously through a simple and low-cost self-assembly process. The prominent capacitive performance of MXene, excellent chemical stability of PEDOT:PSS and 3D porous architecture with inhibited aggregation of MXene nanosheets, large amount of active sites, and electrolyte storage chamber endow the PEDOT/MXene-based porous structure with superior capacitive performance than individual PEDOT:PSS or MXene porous and flat structures. Furthermore, the PEDOT/MXene-based porous structure can be applied as a flexible scaffold for the deposition of conductive polymer to construct excellent electrodes for supercapacitors (SCs). When polypyrrole (PPy) is deposited, the prepared porous PEDOT:PSS/MXene/PPy electrode exhibits a high gravimetric specific capacitance of 345 F g −1 at a current density of 0.5 A g −1 and a remarkable capacitance retention of 89 % over 5000 cycles. Based on it, an asymmetric supercapacitor (ASC) with a high energy density of 56.34 Wh kg −1 at the power density of 120 W kg −1 , and a capacitance retention of 75 % after 5000 cycles is developed. Besides, the porous PEDOT:PSS/MXene/PPy can be constructed on various substrates in any pattern with high design freedom, thus enabling customizable electrochemical performance. When constructing on a flexible substrate, excellent deformation-tolerant performance is shown. This work provides a high-performance electrode for SCs, as well as a universal route for the construction and functionalization of 3D PEDOT-based structures.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
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
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yadi Zhang,Haikuan Yuan,Xinyi Chen,Zhenlin Jiang,Jie Lu,Fan Xin
MXene has a multilayer structure, which can be peeled and layered into single or multilayer nanosheets, and it possesses multiple functional groups that can be easily modified. MOF-303, a kind of metal–organic framework material, was synthesized by the solvent hydrothermal method using aluminum ion as the center metal and 3,5-pyrazole dicarboxylic acid as the organic ligand. In this paper, MOF-303 was grown in situ on Ti3C2Tx MXene to synthesize the MXene@MOF-303 composite, which combined the advantages of both MXene and MOF-303. Using the MXene@MOF-303 composite as blending fillers and a polyacrylonitrile (PAN) ultrafiltration (UF) membrane as the substrate, an MXene@MOF-303/poly(vinyl alcohol) (PVA)/PAN composite membrane was fabricated. The composites and membranes were characterized by FTIR, XRD, SEM, and the pervaporation desalination of the composite membrane was also tested. The experimental results showed that the incorporation of MXene@MOF-303 composites improved the separation performance of the PVA membrane. The MXene@MOF-303/PVA/PAN composite membrane, loaded with 0.5 wt % of MXene@MOF-303, achieved a high flux of 15.87 kg·m–2·h–1 and a rejection of 99.84% when desalinating 3.5 wt % NaCl solution at 35 °C by pervaporation.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Xiang-Shu Hu,Xin Jing,Jing-Wen Mei,Fu-Xiang Liu,Pei-Yong Feng,Jiayi Xu,Yue-Jun Liu
Hydrogels have emerged as ideal materials for sensor fabrication due to their tunable mechanical properties, flexibility, and biocompatibility. However, their high-water content makes them prone to freezing at low temperatures, which compromises their conductivity and mechanical integrity, limiting their use in cold environments. To address this issue, we present a novel hydrogel system consisting of a polyacrylamide (PAM) backbone, a binary solvent system of water and ethylene glycol (EG), and functional materials including polyvinyl alcohol (PVA) and modified MXene. The addition of modified MXene as a conductive filler significantly enhances the hydrogel's conductivity, enabling it to maintain its performance even at low temperatures. Furthermore, the introduction of EG effectively lowers the freezing point of the hydrogel to −36.9 °C, ensuring robust frost resistance. The resulting hydrogel not only shows exceptional low-temperature stability but also exhibits high sensitivity. Moreover, the hydrogel demonstrates rapid responsiveness and high accuracy when being integrated as sensors to detect human motion and ammonia concentrations. These results highlight the potential of MXene-enhanced hydrogels for applications in freshness detection of raw meat and human motion tracking, particularly in cold environments.
研究领域:
材料科学
·
传感器技术
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Weitao Shi,Feifan Hong,Renhuan Li,Ruolin Zhao,Sizhi Ding,Ziqi Liu,Peilin Qing,Yi Fan,Haizhen Liu,Jin Guo,Zhiqiang Lan
MgH 2 is a promising high-capacity solid hydrogen storage material. In this work, MnO 2 -doped Ti 3 C 2 (Ti 3 C 2 @MnO 2 ) was synthesized and used as a catalyst to improve the hydrogen storage performance of MgH 2 . We found that the dehydrogenated 10 wt% Ti 3 C 2 @MnO 2 -doped MgH 2 sample exhibited good hydrogen adsorption ability even at room temperature (30 °C), and could absorb 5.13 wt% of hydrogen in 400 s at 75 °C. The re‑hydrogenated Ti 3 C 2 @MnO 2 -doped MgH 2 sample started to release hydrogen at 182 °C and required 484 s to completely release hydrogen at 275 °C with a dehydrogenation capacity of 6.4 wt%. The Ti 3 C 2 @MnO 2 composite did not change the thermodynamic properties of MgH 2 . In the MgH 2 + Ti 3 C 2 @MnO 2 sample, Ti 3 C 2 , TiO 2 , MnO 2 , MnO, and Mn combined with MgH 2 to form Ti 3 C 2 /MgH 2 , TiO 2 /MgH 2 , MnO 2 /MgH 2 , MnO/MgH 2 , and Mn/MgH 2 multiphase interfaces, which improved the hydrogen storage performance of MgH 2 . The findings of this work may provide a new strategy for preparing novel and efficient catalysts for hydrogen storage applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 11
·2060-2066
·
IF 3.117
Yi Xie,Md Mushfiqure Rahman,Shefiu Kareem,Hao Dong,Fen Qiao,Wei Xiong,Xiaoqing Liu,Neng Li,Xiujian Zhao
In this work, we have established a facile wet-chemical procedure for depositing CuS nanocrystals (NCs) on layered MXenes with efficient photocatalytic activity. Multilayered and few-layered MXenes are respectively achieved by etching MAX in the presence of HF solution and by subsequent intercalating the as-synthesized multilayered Ti3C2Tx with tetramethylammonium hydroxide solution (TMAOH). The CuS/MXene nanocomposites are then prepared by an in situ reaction of sulfur with copper precursors. A unique and simple ligand exchange technique is explored to convert the resulting CuS/MXene nanocomposites to the water phase in order to investigate the photocatalytic activity of the resulting samples. Compared with the pristine MXene and CuS, the CuS/MXene nanocomposite displays higher photocatalytic activity for H2 generation under the illumination of simulated sunlight. The CuS-deposited few-layered MXene demonstrates the highest photocatalytic activity among all the samples. The H2 generation rate of the CuS-deposited few-layered MXene can reach 4.245 μmol g−1 h−1, which is more than 1.42 and 1.49 times higher than that of pure CuS and MXene, respectively. This work might pave the way to a facile and general approach to modulate 0D/2D nanocomposites and heterostructures for promising applications in energy-related fields.
研究领域:
材料科学
·
纳米技术
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 48
·18380-18390
·
IF 4
Yujie Yan,Bo Jin,Rufang Peng
The assembly of 2D Ti3C2Tx nanosheets into 3D structures with orderable structure has great importance for their use as catalyst carriers. However, Ti3C2Tx nanosheets are prone to accumulate in aqueous solutions owing to the strong van der Waals forces between Ti3C2Tx nanosheet layers, degrading their chemical properties. Carbon aerogel (Ti3C2Tx/G/Co) with a 3D porous structure and cobalt as the active site was prepared by a simple co-assembly–freeze–drying–high-temperature carbonization method for application in catalysis of ammonium perchlorate.
研究领域:
材料科学
·
化学工程
✓ 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）