JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 4
·2584-2596
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IF 4.682
Jiao Enxiang,Wu Kun,Liu Yingchun,Zhang Hangzhen,Zheng Haoting,Xu Chang-an,Shi Jun,Lu Mangeng
The development of materials with efficient heat dissipation capabilities and remarkable mechanical properties is essential for high-power integrated electronic devices and flexible smart devices. Herein, a flexible cellulose nanofibers (CNF)/nanodiamond (ND)/MXene (CNM) composite film with typical nacre-like structure is fabricated using a facile vacuum-assisted filtration approach. The composite film exhibits high thermal conductivity of 17.43 W m −1 K −1 at the thickness of 21 μm, which enhances 663% compared with CNF film. This is mainly due to the bridging effect of ND and the favorable orientation of MXene nanosheets. In addition, nacre-like structure and strong hydrogen bonding between MXene and CNF endow satisfactory mechanical properties (89.14 ± 3.61 MPa). Moreover, it is worth to note that the film exhibits improved electrical insulation (1.63 × 10 6 Ω cm) on account of the intervene of the insulating ND block the conductive path formed by MXene. Therefore, the CNM composite films provide a feasible choice of thermal management components for high-power flexible devices.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 5
·3348-3359
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IF 4.682
Zhang Liren,Jiang Yingqiu,Zhou Lingyue,Jiang Zhihong,Li Lu,Che Wenbo,Yu Youming
Abstract Transparent wood (TW) is a promising optical material, which provides a potential choice for windows applications. As a polymer composite material, the mechanical, thermal stability, and flame retardant of TW are crucial properties in practical applications. In this study, the delaminated Ti 3 C 2 T x (MXene) were dispersed into polyvinyl alcohol (PVA) and then infiltrated into delignified wood to prepare MXene-reinforced transparent wood (TW-MXene). The MXene addition leads to an interlocking mechanism between MXene fillers with a polymer matrix (e.g., PVA, cellulose scaffold), thereby improving the tensile strength of TW. Besides, the dynamic mechanical analysis also proved that the tensile strength of TW-MXene is significantly higher than pure transparent wood with changing the temperature at −50 to 150 °C. The TW added with 1 wt% MXene maintained a lower thermal conductivity of 0.31 W m −1 K −1 , and it showed better UV resistance than TW. Besides, the thermal decomposition rate of TW-MXene composite slows down, and its weight loss rate decreases with the addition of MXene. Furthermore, the presence of 1 wt% MXene endowed TW with 9.3 and 22.0% reductions for PHRR and THR, respectively. This strategy provides an insight into the development of high-performance transparent wood composites with the potential to be used in building fields. Graphical abstract
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ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Mao-Cheng Liu,Bin-Mei Zhang,Yu-Shan Zhang,Yu-Xia Hu
Ti3C2 has been considered as a potential material for lithium-ion storage because of its abundant surface terminals, excellent metal-like conductivity, and modifiable layered structure. However, the Li+ diffusion rate in interlayer is limited by the small interlayer spacing determined by the van der Waals forces. Herein, the dehydration condensation reaction between amino-functionalized Ti3C2 (Ti3C2-NH2) and maleic acid (MA) molecules was utilized to enlarge the interlayer spacing of Ti3C2. The MA molecules were successfully welded into interlayers of Ti3C2 by HN–C═O bonds (namely, chemical welding) and MA chemical welded Ti3C2 (MA-Ti3C2) with self-adaption layered structure were obtained. The MA molecules can contribute double effects to the layered structure of Ti3C2, and they act as chains to remit the volume change during Li+ insertion and serve as pillars to enhance the structure stability during Li+ extraction. The MA-Ti3C2 exhibits an interlayer spacing of 1.28 nm, a fast Li+ diffusion rate (1.4 × 10–8 to 5.8 × 10–7 cm2 s–1), and improved Li+ storage performance. The MA-Ti3C2//AC lithium-ion capacitor (LIC) demonstrates an excellent energy density of 102.5 Wh kg–1 at 200 W kg–1 and cycle stability with 76.3% at 1.0 A g–1 after 1000 cycles. This novel chemical welding delivers an effective perspective for modifying the layered structure, enhancing the structure stability, and achieving fast Li+ diffusion and high-rate capability of two-dimension materials.
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Polymers
·
2021
·Vol. 13
·期 17
·2931
·
IF 4.329
Wanxin Peng,Jian Kang,Xiuduo Song,Yue Zhang,Bo Hu,Ya Cao,Ming Xiang
The effects of MXene on the crystallization behavior of β-nucleated isotactic polypropylene (iPP) were comparatively studied. The commonly used MXene Ti3C2Txwas prepared by selective etching and its structure and morphology were studied in detail. Then MXene and a rare earth β-nucleating agent (NA) WBG-II were nucleated with iPP to prepare samples with different polymorphic compositions. The crystallization, melting behavior, and morphologies of neat iPP, iPP/MXene, iPP/WBG-II, and iPP/MXene/WBG-II were comparatively studied. The crystallization behavior analysis reveals that a competitive relationship exists between MXene and WBG-II when they were compounded as α and β nucleating agents. In the system, the β-nucleation efficiency (NE) of WBG-II is higher than α-NE of MXene. The β-phase has relatively low thermal stability and would transform to α-phase when cooled below a critical temperature.Keywords:isotactic polypropylene;MXene;β-nucleating agent;polymorphic crystallization behavior
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
·
IF 5.816
Jingjun Liu,Haiping Zhou,Jiajie Fan,Quanjun Xiang
With photoconductor being transferred and separated, interface contact plays a crucial role in developing composites photocatalyst . In the present work, 2D crystalline g-C 3 N 4 (called as CCN) with 2D TiO 2 nanosheets (called as TO) obtained in situ oxidized single-layered Ti 3 C 2 T x MXene is designed by an electrostatic self-assembly technology. This CCN/TO nanosheets system with a few TiO 2 nanosheets distributed to the surface is not only prolonging lifetime of photoelectron but also stimulating photogenerated carriers transferred in contact interface. The electron transfer mechanism of CCN/TO is further proved by Pt photo-deposition method. Therein, the optimal CCN-TO-0.6 exhibits excellent performance of H 2 generation compared with single photocatalyst of CCN. The result shows that the crystalline g-C 3 N 4 photocatalysts introduced TiO 2 with interfacial effect favorably reduce H + to H 2 and enhance photocatalytic activity .
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JOURNAL OF NANOBIOTECHNOLOGY
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2021
·Vol. 19
·期 1
·1-10
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IF 10.435
Zhu Yi-Cheng,Cai Biao,Jiang Quan,Zhang Yuan,Sha Jianjun,Xie Shaowei
Background The ratio of fPSA/tPSA in the "grey zone" of tPSA with the concentration range between 4 ng/ml and 10 ng/ml is significant for diagnosis of prostate cancer, and highly efficiency quantification of the ratio of fPSA/tPSA remain elusive mainly because of their extremely low concentration in patients' peripheral blood with high biosample complexity. Methods We presented an interdigitated spiral-based MXene-assisted organic electrochemical transistors (isMOECTs) biosensor for highly sensitive determination of fPSA/tPSA. The combination of MXene and the interdigitated multiple spiral architecture synergistically assisted the amplification of amperometric signal of biosensor with dual functionalizations of anti-tPSA and anti-fPSA. Results The ultrasensitivity of the biosensor was enhanced by tunable multiple spiral architecture and MXene nanomaterials; and the sensor exhibited improved detection limit of tPSA and fPSA down to 0.01 pg/ml and acceptable performance of selectivity, repeatability and stability. Moreover, the isMOECTs displayed area under the curve (AUC) value of 0.8138, confirming the potential applications of isMOECTs in clinics. Conclusions The merits of isMOECTs biosensor demonstrated the reliability of MXene-assisted organic electrochemical transistor biosensor with multiple interdigitated spiral for ultrasensitive quantification of fPSA/tPSA, suggesting potential current and future point-of-care testing applications. Graphical Abstract
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yanting Wang,Ting-Ting Li,Bing-Chiuan Shiu,Xuefei Zhang,Hao-Kai Peng,Ching-Wen Lou,Jia-Horng Lin
With the increase of electromagnetic radiation pollution, there is an urgent need to develop lightweight, ultra-thin, and high electromagnetic shielding composite film to eliminate unwanted electromagnetic interference. Herein, based on the layer-by-layer assembly strategy, a simple solution dip coating method was used to achieve the combination of two-dimensional transition metal (MXene) and nanofiber film, thereby constructing a conductive composite film with a unique undulating structure. The silicon-containing hydrophobic layer imparted excellent hydrophobic properties to the composite film while maintained the stability of the sandwich structure. The contact angle (CA) of the composite film with ultra-thin thickness (29um) was 125.49° and the conductivity was as high as 71.91 S/cm. The hydrophobic treatment would not damage the flexibility and mechanical properties of the composite film. In particular, the average shielding effectiveness (SE) and SSE/t could as high as 28.82 dB and 12422.41 dB cm 2 g −1 , due to the layered structure formed by the connection of countless MXene nanosheets is beneficial to promote multiple absorption and reflection. This layer-by-layer assembly strategy provides a facile route in fabricating light-weight, flexible and ultrathin composite film for high-performance electromagnetic shielding, which is of great significance for broadening the practical application of MXene-based conductive materials.
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Nano-Micro Letters
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2021
·Vol. 14
·期 1
·1-21
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IF 16.419
Zhang Xiaoge,Cheng Lili,Lu Yao,Tang Junjie,Lv Qijun,Chen Xiaomei,Chen You,Liu Jie
Gene-engineering tumor cell membrane with CD47 over-expression is achieved to improve the macrophage-mediated phagocytosis of tumor cells by blocking CD47 immune checkpoint.
A cascade-enzyme nanoreactor combining tumor enzyme dynamic therapy, phototherapy, and deoxygenation-activated chemotherapy is proposed.
Glucose oxidase and chloroperoxidase can generate sufficient HClO to kill normoxic tumor cells, and tirapazamine can be subsequently activated to kill hypoxic tumor cells.
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ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Xuhua Liu,Jinlei Miao,Qiang Fan,Wenxiao Zhang,Xingwei Zuo,Mingwei Tian,Shifeng Zhu,Xueji Zhang,Lijun Qu
Wearable electronics have enriched daily lives by providing smart functions as well as monitoring body health conditions. However, the realization of wearable electronics with personal healthcare and thermal comfort management of the human body is still a great challenge. Furthermore, manufacturing such on-skin wearable electronics on traditional thin-film substrates results in limited gas permeability and inflammation. Herein, we proposed a personal healthcare and thermal management smart textile with a three-dimensional (3D) interconnected conductive network, formed by silver nanowires (AgNWs) bridging lamellar structured transition-metal carbide/carbonitride (MXene) nanosheets deposited on nonwoven fabrics. Benefiting from the interconnected conductive network synergistic effect of one-dimensional (1D) AgNWs bridging two-dimensional (2D) MXene, the strain sensor exhibits excellent durability (>1500 stretching cycles) and high sensitivity (gauge factor (GF) = 1085) with a wide strain range limit (∼100%), and the details of human body activities can be accurately recognized and monitored. Moreover, thanks to the excellent Joule heating and photothermal effect endowed by AgNWs and MXene, the multifunctional smart textile with direct temperature visualization and solar-powered temperature regulation functions was successfully developed, after further combination of thermochromic and phase-change functional layers, respectively. The smart textiles with a stretchable AgNW-MXene 3D conductive network hold great promise for next-generation personal healthcare and thermal management wearable systems.
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ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 15
·2110636
·
IF 18.808
Xiao-Peng Li,Xiaofeng Li,Heguo Li,Yue Zhao,Jing Wu,Shouke Yan,Zhong-Zhen Yu
Although many solar-driven water evaporators are developed for solar steam generation, most solarthermal energy conversion materials cannot be used repeatedly for constructing solarthermal water evaporators with variable shapes and patternable surfaces. Herein, reshapable Ti 3 C 2 T x MXene/graphene oxide (GO)/polyaniline (PANI) (MGP) hybrids with variable shapes and patternable surfaces are fabricated by PANI-assisted assembly of GO and MXene for efficient solar-driven purifications of both seawater and wastewater. The variable shapes, patternable surfaces, and reusability of the plastic MGP hybrids are attributed to the strong interactions of PANI with both GO and MXene. Benefiting from the excellent solarthermal energy conversion of hydrophilic GO and MXene, the variable shapes and patternable surfaces of the MGP, and the reduced water vaporization enthalpy, the patternable MGP evaporators with flat and concave pyramid surfaces exhibit average water evaporation rates of as high as 2.89 and 3.30 kg m −2 h −1 under 1-sun irradiation, respectively. When the plastic MGP is molded to a flower-shaped evaporator, an outstanding evaporation rate of ≈3.94 kg m −2 h −1 with an exceptional evaporation efficiency of ≈135.6% is achieved under 1-sun irradiation. The reusable MGP evaporators are highly efficient in generating clean water from both seawater and wastewater with satisfactory ion rejection rates of nearly 100%.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jingwen Dong,Shilu Luo,Senpeng Ning,Gui Yang,Duo Pan,Youxin Ji,Yuezhan Feng,Fengmei Su,Chuntai Liu
Stretchability and multifunctional heating abilities are highly desired for wearable electromagnetic interference (EMI) shielding fabrics to tackle the growing electromagnetic pollution for special crowd, such as pregnant women. Herein, we fabricated stretchable MXene-coated thermoplastic polyurethane (TPU) fabrics by simple uniaxial prestretching and spraying methods. The obtained unique wrinkled structure endowed the film with effective strain-invariant electrical conductivity and EMI shielding properties. Specifically, the prepared stretchable film with an extremely low MXene loading (0.417 mg cm–2) exhibited a stable EMI shielding effectiveness of approximately 30 dB under 50% tensile strain and durability during stretching and bending cycles. More importantly, owing to the high electrical conductivity and localized surface plasmon resonance (LSPR) effect of the MXene layer, the stretchable fabrics exhibited excellent Joule heating (up to 104 °C at a voltage of 5 V) and superior photothermal conversion abilities. Moreover, the unique wrinkled MXene-coating layer not only endows the fabrics with stretchable heat abilities but also enhances the photothermal conversion performance by increasing the light absorption area and travel path. We believe that this study offers a novel strategy for the versatile design of stretchable and multifunctional wearable shielding fabrics.
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CARBON
·
2021
·
IF 9.594
Pengfei Tang,Bo Yang,Rui Li,Yunchuang Wang,Xiaodong Li,Guangcheng Yang
Achieving higher energy storage and controllable energy release processes is the major research goal in solid propellants . Combustion catalysts are applied to modify the energy release behavior of solid propellants but at the expense of lowering the total energy density of the propellants owing to their non-energetic feature. Here, with ammonium perchlorate (AP) based propellant as proof-of-concept material, we demonstrate a reactive combustion catalyst strategy based on the clever use of the novel structure of Ti 3 C 2 MXene , including appropriate reactivity, high energy storage, and large specific surface area. It is found that the Ti 3 C 2 MXene could first react with AP as fuel, releasing large amount of heat and in-situ generating TiO x /C nanosheets . The resulting TiO x /C nanosheets can further catalyze the thermal decomposition of AP by accelerating both electron and proton transfer during AP decomposition. As expected, the Ti 3 C 2 MXene not only improves the pyrolysis reaction kinetics of AP based composites, but also increases the energy output of the propellants. The development of reactive catalysts with excellent catalytic activity and increased energy release provides a new strategy for the design of solid propellants.
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