ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Qiong Ma,Xin-Pan Cui,Wen-Hui Zhou,Dong-Xing Kou,Zheng-Ji Zhou,Yue-Na Meng,Ya-Fang Qi,Sheng-Jie Yuan,Li-Tao Han,Si-Xin Wu
Kesterite Cu2ZnSn(S,Se)4 (CZTSSe) has been considered as the most promising absorber material for inorganic thin-film solar cells. Among the three main interfaces in CZTSSe-based solar cells, the CZTSSe/Mo back interface plays an essential role in hole extraction as well as device performance. During the selenization process, the reaction between CZTSSe and Mo is one of the main reasons that lead to a large open circuit voltage (VOC) deficit, low short circuit current (Jsc), and fill factor. In this study, 2D Ti3C2-MXene was introduced as an intermediate layer to optimize the interface between the CZTSSe absorber layer and Mo back contact. Benefiting from the 2D Ti3C2-MXene intermediate layer, the reaction between CZTSSe and Mo was effectually suppressed, thus, significantly reducing the thickness of the detrimental Mo(S,Se)2 layer as well as interface recombination at the CZTSSe/Mo back interface. As a result, the power conversion efficiency of the champion device fabricated with the 2D Ti3C2-MXene intermediate layer was improved from 10.89 to 13.14% (active-area efficiency). This study demonstrates the potential use of the 2D Ti3C2-MXene intermediate layer for efficient CZTSSe solar cells and promotes a deeper understanding of the back interface in CZTSSe solar cells.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Yihua Lv,Jingyan Tian,Zebin Chen,Jianhao Wang,Li-An Ma,Lei Zhang,Song Chen,Qianting Wang,Xiaoyun Ye
The development of high-performance microwave-absorbing materials (MAMs) to address electromagnetic (EM) pollution has become a focus of attention for researchers. The combination of MXene and heterogeneous MOF with complementary advantages can be designed into novel composites with promising microwave absorption (MWA) properties. In this paper, the M/CoNi/C series composites derived from MXene/CoNi-MOF were prepared by in situ hydrothermal-pyrolysis process. The effects of the molar ratio of Co 2+ /Ni 2+ and the addition amount of MXene on the morphology and EM parameters of the composites were investigated, and then the MWA performance and mechanisms of M/CoNi/C composites were analyzed. The results showed that the uniformly distributed CoNi and graphitic carbon in the M/CoNi/C composites formed a core–shell structure, and TiO 2 nanoparticles modified on the carbon lamellas originated from MXene. The minimum reflection loss (RL min ) value of the optimized M/Co 1 Ni 1 /C reaches −61.34 dB only at the thickness of 1.9 mm, and the effective absorption bandwidth (EAB) value is 5.2 GHz only at 1.7 mm. The RL min values in the thickness range of 1.5–3.0 mm are all less than −30 dB. The tunable microstructures, multiple interfacial polarizations, and dielectric-magnetic synergies optimize the impedance matching, which is conducive to achieving good broadband EM wave absorption performance. This paper provides a reference strategy for the design and construction of a high-performance MXene-based microwave absorber with controllable morphology and electromagnetic parameters.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Cuizhen Yang,Tingyao Wang,Chengcheng Li,Haiyan He,Dongming Liu,Huajie Huang
In this study, we demonstrate a facile soft chemistry strategy for the in situ growth of two-dimensional (2D) ultrathin PdMo bimetallene tightly coupled with Ti3C2Tx MXene nanosheets (PdMo/Ti3C2Tx) using a robust stereoassembly process. The 2D PdMo bimetallene offers numerous unsaturated Pd atoms and simultaneously induces combined bimetallic alloy and strain effects, while the Ti3C2Tx matrix effectively optimizes the electronic structure of PdMo bimetallene via a face-to-face interface interaction and guarantees exceptional electrical conductivity. As a consequence, the newly designed PdMo/Ti3C2Tx nanoarchitecture expresses remarkable electrocatalytic properties for the formic acid and methanol electro-oxidation, in terms of large electrochemically active surface areas, ultrahigh catalytic activity, strong antipoisoning ability, and dependable long-term stability, all of which are better than those of conventional Pd nanoparticle catalysts supported by Ti3C2Tx and carbon matrices.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Linjing Qiao,Jianqiang Bi,Yao Yang,Guandong Liang,Shaoyin Wang,Hongyi Wang
Nowadays, the increasingly severe electromagnetic (EM) wave pollution requires high-performance EM wave absorbing materials. Multi-principal-element materials are acknowledged as promising for broadening the applications owing to their tunable chemistries and structures in many fields, including as EM wave absorbers. Herein, we prepared a high-entropy MXene , (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x . Furthermore, multi-principal-element (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x /FeCoNi and (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x /FeCoNiCu composites were synthesized via an in-situ hydrothermal process by combining high-entropy MXene with medium-entropy magnetic alloys . In contrast with the relatively narrow effective absorption bandwidth (EAB) of (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x MXene (2.56 GHz), (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x /FeCoNi composite with 50 wt% MXene can attain an optimum EAB of 4.88 GHz with the matching thickness of only 1.73 mm. As for (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x /FeCoNiCu composites, both the absorption efficiency and absorption bandwidth are significantly enhanced. The combination of multi-principal-component strategy and composite construction endows the composites with synergistic dielectric and magnetic losses, optimized impedance matching as well as enhanced attenuation ability, thus improving EM wave absorption performances. In addition, radar cross section (RCS) simulation confirms that the prepared composites have broad application prospects as radar stealth materials.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xinyi Wang,Pan Xue,Shaoshuai Ma,Yanan Gong,Xinhua Xu
In nature, living organisms, such as octopuses, cabrito, and frogs, have already evolved admirable adhesive abilities for better movement and predation in response to the surroundings. Inspired by biological structures, researchers have made enormous efforts in developing actuators that can respond to external stimuli, while such adhesive property is very desired, yet there is still limited research in responsive hydrogel actuators. Here, a bilayer actuator with high stretchability and robust interface bonding is presented, which has a smart adhesion and thermoreception function. The system consists of an adhesive passive layer copolymerized of amphoteric ([2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl), SBMA) and acrylic acid (AA), and an active layer hydrogel composed of poly(N-isopropylacrylamide) (PNIPAm) containing polydopamine-modified MXene (P-MXene) and calcium chloride (CaCl2). The coordination of carboxylate and Ca2+ at the interface of the two layers enhances the interfacial bonding from 14 to 30 N m–1, which facilitates withstanding large strain and preventing stratification. The resulting hydrogel actuator can bend approximately 360° in a mere 10 s, exhibiting excellent photothermal effect, a large angle bending deformation, and ultrafast photoresponsive ability. As a proof of concept, the photothermal actuators are programmed to present various shapes and grab objects. Importantly, the hydrogel actuator exhibits remarkable adhesion capabilities toward diverse substrates, with a maximum peel force of up to 280 N m–1. Relying on their own adhesion and the photoresponse properties, these flexible adhesion actuators show outstanding gripping capability, enabling them to grip and release objects of different shapes and weights. More interestingly, the hydrogel exhibits a smart adjustable adhesion capability at different temperatures, which enables it as a gripper to recognize temperature signals through real-time different feedback actions based on its own adhesion. This study presents innovative insights into biomimetic hydrogel actuators, providing new opportunities for developing intelligent soft robots with multiple functions.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Minglu Tang,Zhengya Yue,Jialun Li,Tiedong Sun,Chunxia Chen
Nanozymes attract widespread attention in the biomedical field owing to their catalytic activity and unique physicochemical properties, particularly for tumor catalytic therapy. Nevertheless, the complex tumor microenvironment (TME) and limited hydrogen peroxide (H2O2) restrict catalytic therapeutics by nanozymes. Enhancing the catalytic activity of nanozymes for efficient catalytic therapy is extremely meaningful for further research. Here, we report MXene-based platinum (Pt) and glucose oxidase (GOD) hybrid nanozymes (Ti3C2/Pt-GOD) for hyperthermal-enhanced cascade catalytic therapy. In this construct, the Pt nanoparticles with peroxidase-like (POD-like) and catalase-like (CAT-like) activities can catalyze H2O2 to produce reactive oxygen species (ROS) for catalytic therapy and oxygen (O2) to alleviate hypoxia simultaneously for the oxidation reaction of GOD with glucose for self-supply of H2O2. MXene as a deposition matrix coupled with photothermal properties enables photothermal therapy (PTT) and hyperthermal-enhanced catalytic therapy under near-infrared (NIR) laser. The effect of the photothermal-catalytic synergy therapy was validated both in vitro and in vivo. This construction of Ti3C2/Pt-GOD composites and hyperthermal-enhanced catalytic therapy provides a promising reference for nanozyme-mediated catalytic medicine.
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Small
·
2023
·Vol. 19
·期 49
·2303113
·
IF 13.3
Yan Gao,Jinjie Lin,Xiao Chen,Zhaodi Tang,Geng Qin,Ge Wang
2D MXene is highly preferred for photothermal energy conversion and microwave absorption. However, the aggregation issue, insufficient dielectric loss capacity, and lack of magnetic loss capacity for MXene severely hinder its practical applications. Herein, the authors propose multi-dimensional nanostructure engineering to electrostatically assemble 2D MXene and layered double hydroxides (LDH) derived from ZIF-67 polyhedron into a 3D hollow framework (LDH@MXene), and subsequently calcined to construct a Co nanoparticle-modified 3D hollow C-LDH@MXene framework to encapsulate a paraffin wax (PW) phase change material (PCM). The 3D hollow C-LDH@MXene framework not only prevents 2D MXene from aggregation but also contributes a high thermal energy storage density (131.04 J g −1 ). Benefiting from a 3D conductive network facilitating the rapid transport of photons and phonons from the interface to the interior and the synergistic localized surface plasmon resonance (LSPR) effect of MXene and Co magnetic nanoparticles, the C-LDH@MXene-PW composite PCM yielded a high photothermal storage efficiency of 96.52%. Besides, C-LDH@MXene-PW composite PCMs also exhibited efficient microwave absorption with a minimum reflection loss of −20.87 dB at 13.30 GHz with a matching thickness of only 2 mm. This distinctive design provides constructive references for the development of integrated composite materials for energy storage and microwave absorption.
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JOURNAL OF POWER SOURCES
·
2023
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IF 9.2
Jiayi Gu,Yuting Feng,Xing Wei,Chengcheng Zhang,Tianshu Peng,Lu Lu,Zhenzhen Wei,Yan Zhao
Introducing inorganic particles into separator for lithium batteries has been proven to be a very effective and facile way to improve battery safety and performance. In this work, a composite separator (PBS-M-S) was developed via asymmetrically coating the conductive MXene particles and the nonconductive silica particles onto a biodegradable poly(butylene succinate) (PBS) fibrous membrane. Such a structure and material design was able to give the produced separator exceptional all-around properties. Specifically, the PBS-M-S separator displayed great flexibility with a 250% elongation at break , high temperature sensitivity with shutdown function at 120 °C, and thermal stability with flame retardancy . Moreover, the network constructed by PBS's micro/nano fibers and the electrolyte affinity of silica allowed the separator to maintain abundant electrolyte. This, combined with the incorporation of MXene, optimized the separator with high ionic conductivity (3.386 mS cm −1 ), lithium ion transference number (0.51) and lithium dendrite inhibition ability, which rendered the cell with outstanding cycling stability. Therefore, taking safety and battery performance into account, the as-prepared composite membrane could be a promising separator candidate for lithium ion batteries .
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LANGMUIR
·
2023
·
IF 3.9
Miaomiao Liu,Xiaosen Pan,Yuanjing Gan,Meng Gao,Xinran Li,Zhen Liu,Xiaojun Ma,Mengru Geng,Xiangqi Meng,Ning Ma,Jie Li
Titanium carbide MXene quantum dots (MQDs) possess intrinsic regulatory properties and selective toxicity to cancer cells. Here, MDQs were selected for the modification of hydroxyapatite (HA) microspheres, and MXene quantum dots-modified hydroxyapatite (MQDs-HA) hollow microspheres with controllable shapes and sizes were prepared as bone drug carriers. The results show that the prepared MQDs-HA hollow microspheres had a large BET surface area (231.2 m2/g), good fluorescence, and low toxicity. In addition, MQDs-HA showed a mild storage–release behavior and good responsiveness of pH and near-infrared (NIR). Thus, the MQDs-HA hollow microspheres have broad application prospects in the field of drug delivery and photothermal therapy.
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Small
·
2023
·
IF 13.3
Yi Wang,Zhiling Luo,Zhonghua Zheng,Xuhui Ye,Guanfeng Xue,Yongqiang Qian,Luzhuo Chen
Most exogenous electronic skins (e-skins) currently face challenges of complex structure and poor compatibility with the human body. Utilizing human secretions (e.g., sweat) to develop e-skins is an effective solution strategy. Here, a new kind of “sweat-driven” e-skin is proposed, which realizes energy-storage and thermal-management multifunctions. Through the layer-by-layer assembly of MXene-carbon nanotube (CNT) composite with paper, lightweight and versatile e-skins based on supercapacitors and actuators are fabricated. Long CNTs wrap and entangle MXene nanosheets, enhancing their long-distance conductivity. Furthermore, the CNT network overcomes the structural collapse of MXene in sweat, improving the energy-storage performance of e-skin. The “sweat-driven” all-in-one supercapacitor with a trilayer structure is patternable, which absorbs sweat as electrolyte and harnesses the ions therein to store energy, exhibiting an areal capacitance of 282.3 mF cm −2 and a high power density (2117.8 µW cm −2 ). The “sweat-driven” actuator with a bilayer structure can be driven by moisture (bending curvature of 0.9 cm −1 ) and sweat for personal thermal management. Therefore, the paper serves as a separator, actuating layer, patternable layer, sweat extractor, and reservoir. The “sweat-driven” MXene-CNT composite provides a platform for versatile e-skins, which achieve the interaction with humans and offer insights into the development of multifunctional wearable electronics.
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BIOSENSORS & BIOELECTRONICS
·
2023
·
IF 12.6
Xin Liu,Alei Dang,Tiehu Li,Tung-Chun Lee,Yiting Sun,Yuhui Liu,Fei Ye,Shuze Ma,Yong Yang,Weibin Deng
Developing substrates that combine sensitivity and signal stability is a major challenge in surface enhanced Raman scattering (SERS) research. Herein, we present a flexible triple-enhanced Raman Scattering MXene/Au nanocubes (AuNCs) sensor fabricated by selective filtration of Ti 3 C 2 T x MXene/AuNCs hybrid on the Ti 3 C 2 T x MXene membrane and subsequent treatment with 1H,1H,2H,2H-perfluoro-octyltriethoxysilane (FOTS). The resultant superhydrophobic MXene/AuNCs-FOTS membrane not only provides the SERS substrate with environmental stability, but also imparts analyte enrichment to enhance the sensitivity (LOD = 1 × 10 −14 M) and reliability (RSD = 6.41%) for Rhodamine 6G (R6G) molecules owing to the attenuation of the coffee ring effect. Moreover, the triple enhancement mechanism of combining plasmonic coupling enhancement from plasmonic coupling (EM) of nearby AuNCs at lateral and longitudinal direction of MXene/AuNCs-FOTS membrane, charge transfer (CT) from Ti 3 C 2 T x MXene and target molecules and analyte enrichment function provides the substrate with excellent SERS performance (EF = 3.19 × 10 9 ), and allows efficient quantification of biomarkers in urine. This work could provide new insights into MXenes as building blocks for high-performance substrates and fill existing gaps in SERS techniques.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 28
·11666-11679
·
IF 4.5
Wang Yanting,Zhang Xuefei,Lin Jia-Horng,Li Ting-Ting,Lou Ching-Wen,Lin Jiao,Yang Hongying
The rapid development of wireless communication and electronic equipment requires active measures to eliminate electromagnetic radiation hazards. Based on the layered assembly strategy, MXene-based composite fabric with multiple functional layers was prepared by combining two-dimensional transition metal (MXene) with PP substrate by a simple solution dipping method. PP substrate endowed pure MXene film certain mechanical properties, and polydopamine modification on the surface of PP enhanced the bonding fastness between the substrate and MXene layer. The silicon-containing hydrophobic layer imparted hydrophobic properties to the conductive fabric, thus ensuring the stability of the conductivity of the MXene layer when used in complex environments. The results shown that the conductivity and electromagnetic shielding effectiveness (EMI SE) of the composite fabric increased with the increased in impregnation times. When the impregnation times were three, the conductivity and EMI SE of the composite fabric were 6.54 S/cm and 32.57 dB, respectively. After hydrophobic treatment, the contact angle of the composite fabric was 140.49°. In addition, the average EMI SE and shielding efficiency still reached 25.12 dB and 99.69%. The excellent EMI shielding capability coupled with favorable bendability endows MXene-based composite fabric to be an alternative choice in electronics, aerospace and smart wearables.
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