SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Fuqiang Guo,Cheng Feng,Zheng Zhang,Lili Zhang,Chang Xu,Congting Zhang,Shuang Lin,Huanxing Wu,Baohua Zhang,Aersi Tabusi,Yineng Huang
In this paper, the Ti 3 C 2 T x /CuO nanocomposites were successfully prepared by an environment-friendly and simple hydrothermal method . The synthetics are evaluated using a series of characterization techniques, such as XRD , SEM, TEM , XPS , FTIR, UV–vis, and BET techniques. The results show that Ti 3 C 2 T x /CuO nanocomposites are mesoporous and have a higher specific surface area than Ti 3 C 2 T x , confirming the presence of more gas adsorption/diffusion regions. Furthermore, the Ti 3 C 2 T x with the introduction of CuO has rich oxygen vacancies and adsorbed oxygen. In particular, the response of Ti 3 C 2 T x /CuO sensor (56.99%) is 5 times higher than that of Ti 3 C 2 T x (11.17%) sensor to 50 ppm NO 2 at room temperature (RT). Especially, the Ti 3 C 2 T x /CuO sensor exhibits ultra-fast response/recovery time (16.6/31.3 s to 20 ppm NO 2 ), great reversibility , outstanding selectivity to NO 2 , and desirable long-term stability (over 40 days). The enhanced gas sensing performance may be attributed to the formation of hybrid heterojunctions between CuO and Ti 3 C 2 T x that provide carrier migration channels to hasten the redox reaction . At the same time, Ti 3 C 2 T x /CuO possesses more oxygen vacancies and adsorbed oxygen than Ti 3 C 2 T x , which will reduce the required energy for gas adsorption to further enhance the gas sensing performance. Hopefully, the above improved gas sensing performance indicators modified with CuO are expected to become the advantage of constructing Ti 3 C 2 T x -based sensor, which will be put into commercial NO 2 detection in the future.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Beibei Ma,Fu Chen,Yongzhi Cheng,Xian Wang,Shuoqing Yan,Rongzhou Gong,Hui Luo
High-performance microwave absorption materials are considered to be an effective solution to the increasing electromagnetic pollution. In this work, Ti 3 C 2 T x MXene@NiFe-layered double hydroxide (NiFe-LDH) derived multi-interfacial FeNi 3 /TiN@nitrogen-doped carbon (NC)@magnetic multiwalled carbon nanotube composites were prepared by a hydrothermal process and subsequent carbothermal reduction. The phase compositions, morphology, defects and electromagnetic parameters of the composites can be regulated by the thermal treatment temperature. The reflection loss value of the composite with a thickness of only 1.6 mm can reach − 43.75 dB when the heat treatment temperature is 900 °C, and the effective absorption bandwidth is 5.5 GHz with a thickness of 2.12 mm when the heat treatment temperature is 700 °C. The synergistic effects among the associated dielectric loss, magnetic loss and the impedance matching of the samples are also systematically investigated. This work provides a new perspective and an effective approach for acquiring MXene hybrids derived high-performance microwave absorbing materials.
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Yin Zhang,Yanping Huang,Bingqun Lin,Zupeng Chen,Xinwu Xu,Mingzhu Pan
Photocatalytic degradation is an eco-friendly technology for volatile organic compound (VOC) removal, but searching for a highly efficient photocatalyst system remains a challenge. Here, a novel photocatalyst , ZnO/Ti 3 C 2 T X composite, was developed by the electrostatic deposition strategy, wherein Ti 3 C 2 T X nanosheets serve as a support to provide abundant surface-active sites for loading ZnO spheres and adsorbing VOC molecules. Furthermore, successive catalytic centers are formed to enlarge the photocatalytic reaction interface , thereby minimizing the photogenerated electron transfer distances. Moreover, a Schottky heterojunction was successfully formed between the ZnO spheres and Ti 3 C 2 T X nanosheets , which further suppressed the recombination of photogenerated electron–hole pairs. As a result, the ZnO/Ti 3 C 2 T X composite exhibited enhanced photocatalytic activity , universality and stability in VOCs degradation. The photodegradation efficiencies of formaldehyde, methyl alcohol and acetone were as high as 91 %, 84 % and 80 % by ZnO/Ti 3 C 2 T X composite, respectively. The pseudo-first-order kinetic constant of formaldehyde decomposition on ZnO/Ti 3 C 2 T X was 2.69 times greater than that on pristine ZnO. This work presents a novel photocatalyst system of ZnO/Ti 3 C 2 T X composite and provides an insight for the development of highly efficient photocatalysts for the degradation of VOCs.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Qiong Zhang,Dewen Xu,Yunfa Si,Renxin Xu,Bailu Luo,Shuangyuan He,Dan Liu
As a recently emerging 2D material, Ti3C2TX MXene, with some distinct characters, might bring opportunities for developing advanced microwave absorption materials (MAMs). Although the multilayered MXene with an accordion-like structure has been used as the building blocks to obtain composite MAMs, the exfoliated MXene (eMXene) nanosheets have rarely been explored. Herein, we construct a hierarchically structured MXene-based composite by simultaneously decorating magnetic nanosheets/particles onto eMXene sheets for an efficient microwave absorption. Systematic ex situ characterizations reveal that the eMXene sheets can act as a structure-directing agent and host to allow an interlaced growth of ultrathin CoO nanosheets and spherical Co@C nanoparticles onto their surfaces. Such structural design impedes the agglomeration of eMXene sheets and magnetic nanounits while guaranteeing the adequate exposure of polar functional groups on MXene surfaces. Meanwhile, the introduction of dual magnetic phases enables an additional magnetic loss capability and also builds massive void spaces and rich heterointerfaces between various nanounits for a significantly enhanced dielectric polarization loss, resulting in a superior impedance matching and attenuation capability. Accordingly, the optimal composite exhibits a minimum reflection loss of −73.4 dB at a thin thickness of 2.1 mm and an effective absorption bandwidth up to 5.6 GHz (12.4–18.0 GHz) at a thin thickness of 1.8 mm. This study might stimulate the further development of exfoliated MXene-based composite microwave absorbers with hierarchical structures.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Daoyuan Zu,Haoran Song,Changping Li,Yuwei Wang,Rong Du,Rui Zhou,Wei Zhang,Shiting Pan,Yang Cai,Yongming Shen,Zhifeng Yang
Self-catalyzed decomplexation of Cu-ethylene diamine tetraacetic acid complex (Cu-EDTA) and recovery of Cu without addition of extraneous transition metals were achieved in Ti 3 C 2 T x MXene/peroxymonosulfate (Ti 3 C 2 T x /PMS) process. Free radical quenching experiments and electron spin resonance (ESR) measurements demonstrated that both hydroxyl radical (HO • ) and sulfate radical (SO 4 •- ) contributed to the degradation of Cu-EDTA. Activation of PMS by Ti 3 C 2 T x initiated Cu-EDTA decomplexation and released free Cu ions . Then, the formation of Ti-O-Cu bonds between Cu ions and Ti 3 C 2 T x accelerated the electron transfer from Ti 3 C 2 T x to Cu(Ⅱ) and triggered Cu(Ⅱ)/Cu(Ⅰ) cycle, which further enhanced PMS activation and led to the self-catalyzed decomplexation of Cu-EDTA. Simultaneous recovery of Cu was achieved due to the excellent absorption performance of negative charged Ti 3 C 2 T x towards Cu ions. This study revealed the self-catalyzed decomplexation mechanism of Cu-EDTA in the Ti 3 C 2 T x /PMS process and provided a feasible strategy for heavy metal complexes treatment.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Rui Zhou,Bo Tu,Dacheng Xia,Hanping He,Zhiwei Cai,Nan Gao,Gang Chang,Yunbin He
Accurate measurement of dopamine (DA) is of great significance for human health monitoring and disease prevention. Herein, two-dimensional Ti 3 C 2 T x MXene with high performance was prepared by layer liquid exfoliation method and used for the modification of gate electrode. The glassy carbon electrode (GCE) modified with Pt/Ti 3 C 2 T x was used as the gate, and assembled with monolayer graphene channel to form a complete transistor device. The device combines the amplification effect of transistors, good electrical conductivity of Ti 3 C 2 T x MXene and excellent catalytic properties of Pt nanoparticles , showing a low detection limit (50 nM) and a wide detection concentration range (50 nM-9 mM) of DA. Ti 3 C 2 T x MXene not only provides a large number of attachment sites for the deposition of Pt nanoparticles , but also improves the electrical conductivity and hydrophilicity of the electrode material , thus enhancing the sensitivity of the device and facilitating the penetration of the solution to be measured. In addition, Ti 3 C 2 T x MXene is negatively charged, it has a certain electrostatic adsorption effect on protonated DA and electrostatic repulsion effect on negatively charged interfering substances. As a result, the device exhibits good selectivity , which provides a great application prospect for the construction of DA sensing platform.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yujie Gao,Yuanhao Dong,Shuting Yang,Anchun Mo,Xin Zeng,Qianming Chen,Qiang Peng
Developing antibiotics-independent antibacterial materials is of great importance for combating drug-resistant bacteria, such as methicillin-resistant Staphylococcus aureus (MRSA). MXene (transition metal carbides and nitrides), a class of novel 2D nanomaterials , has shown great potentials in biomedical areas. However, the effect of MXene size on its properties and bioactivity is still unknown. Herein, we report for the first time that the antibacterial photothermal therapy efficacy of Ti 3 C 2 T x MXene nanosheets is size-dependent. Three MXene suspensions with small size of 196 nm (MX-s), medium size of 347 nm (MX-m) and large size of 497 nm (MX-l) were prepared via ultrasonication. Upon NIR irradiation for 5 min, the temperature of MXene suspensions (10 μg/mL) increased to 64, 60 and 56 °C for MX-s, MX-m and MX-l, respectively. Accordingly, the viability loss of MRSA induced by MX-s, MX-m and MX-l under NIR was 93%, 69% and 56%, respectively. The in vivo study in the MRSA-infected mouse model showed that the photothermal therapy efficacy of MX-s was comparable to that of the positive control vancomycin . This is the first report on the size-dependent photothermal effect and photothermal antibacterial activity of MXene, which may guide the development of MXene-based therapeutics in the future. In addition, the drug-free antibacterial therapy has great implications for the treatment of antibiotics-resistant bacteria infections.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Hong Zhang,Yao Chen,Xiaofang Liu,Hengyang Wang,Chengzhi Niu,Sikang Zheng,Bin Zhang,Xu Lu,Guoyu Wang,Guang Han,Xiaoyuan Zhou
SnSe-based materials, comprising nontoxic, eco-friendly and abundant elements, have intrinsically low lattice thermal conductivity , which are promising candidates for thermoelectric conversion. However, unmodified, polycrystalline SnSe reveals poor electrical transport properties due to the lower carrier mobility . Herein, two-dimensional Ti 3 C 2 T x MXene has been incorporated into SnSe matrix by solution synthesis and fast consolidation, which efficiently increases the carrier mobility and concentration; accordingly, the electrical conductivity is improved in the temperature range of 323–523 K. Meanwhile, SnSe/Ti 3 C 2 T x composites achieve diminished lattice thermal conductivity, delivering a low value of 0.41 W m −1 K −1 at 773 K. Ultimately, a peak zT of 0.93 at 773 K is attained in SnSe/Ti 3 C 2 T x composite with addition of 0.3 wt% Ti 3 C 2 T x , representing a 66% increase compared to that of SnSe. This work sheds light on the thermoelectric performance improvement of polycrystalline SnSe by controllably incorporating two-dimensional MXene.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Jinxin Xu,Ting Peng,Qi Zhang,Huaming Zheng,Huangzhong Yu,Shengwei Shi
MXenes have shown potential applications in electrochemical energy storage due to their high electrical conductivity, pseudocapcitance, and two-dimensional layered structures with a regulatable interlayer spacing. The intercalation strategy is generally a supplementary and even indispensable process for high-quality MXenes, and it can greatly influence the properties of MXenes. Here, we applied four universal intercalants to adjust the interlayer spacing, among which tetrabutylammonium hydroxide (TBAOH) resulted in MXenes with a largest interlayer spacing of 16.58 Å. Furthermore, the intercalants can influence the surface terminal groups, which had an important effect on the electrochemical properties of MXenes. The TBAOH-intercalated MXene showed the highest specific capacitance (391.0 F g–1 at 2 mV s–1), good rate performance, and excellent cycling stability (96.3% at 10,000 cycles), which was attributed to its vastly expanded layered structure and abundant surface terminal groups, and the capacitance contributions were found to arise more from the surface capacitive effect process than from the diffusion-controlled process. This work demonstrates that the intercalation strategy of MXenes should be intensively investigated to understand the complicated processes including interlayer spacing and surface chemistry, and it may guide the selection of an intercalation strategy for energy storage and other applications based on MXenes.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xin-Jie Luo,Lulu Li,Hao-Bin Zhang,Sai Zhao,Yu Zhang,Wei Chen,Zhong-Zhen Yu
To diversify the motion modes of multifunctional soft robots capable of shape programming, we fabricate a biomimetic and programmable Ti3C2Tx MXene/low-density polyethylene (LDPE) bilayer actuator by spraying an aqueous dispersion of MXenes onto a plasma-activated LDPE film, followed by optimal thermal regulations. Because of the eminent light absorption and photothermal/electrothermal features of MXenes and the extremely mismatched thermal expansion coefficients between the two layers, the MXene/LDPE actuator can be sensitively driven by many stimuli of near-infrared light, electricity, and heat. The initial configuration of the bilayer actuator can be programmed by tuning the thermal regulation temperature, thereby assembling multiple actuation units to achieve biomimetic functions, such as artificial iris, mechanical arms, and flying birds. More importantly, in virtue of free shape cutting and programmable configuration, the MXene/LDPE bilayer actuator can perform untethered locomotion including crawling, rolling, and sailing. The soft robots can not only move on the ground in different forms but also sail on water along any designated routes and complete the surface cargo transportation driven by a near-infrared laser via the photothermal Marangoni effect. The shape-programmable methodology for the three amphibious motion modes lays foundations for wide applications of the MXene-based soft robots.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xian Zeng,Yuchen Wang,Xinyi He,Caocong Liu,Xi Wang,Xinpeng Wang
Being one of the most toxic pollutants commonly present in wastewater as soluble hexavalent chromium (Cr(VI)) specie, its concomitant adsorption and chemical reduction to relatively insoluble and less poisonous Cr(III) would be an effective strategy for remediation of Cr-polluted water. As such, a novel MXene-polyelectrolyte nanocomposite was typically synthesized for enhanced Cr(VI) removal. In detail, we applied polyethylenimine (PEI) to modify the Ti 3 C 2 T x surfaces and synthesized Ti 3 C 2 T x /PEI nanocomposites. The as-prepared composites were characterized by various methods such as SEM-EDX, N 2 sorption-desorption isotherm, XRD, FTIR, and XPS. Further, the Ti 3 C 2 T x /PEI was used to adsorb Cr(VI) for clarifying the kinetics, isotherms, and the effects of solution pH and coexisting ions on Cr(VI) removal by batch experiments. Our results show that coating of Ti 3 C 2 T x nanosheets with PEI regulates surface charge of the as-synthesized adsorbent and creates it with a three-dimensional network, allowing the fast electrostatic adsorption of Cr(VI) anions to positively charged surface over wide pH range of 1–10 and promoting to achieve improved removal capacity maximum up to 186.5 mg/g. The Cr(VI) adsorption data were well fitted by the pseudo-second-order kinetic and Langmuir isotherm models. In addition, Ti 3 C 2 T x /PEI also exhibits excellent selectivity for Cr(VI) anions over competing ones such as NO 3 − , Cl − , ClO 4 − , and SO 4 2− . Time-dependent reaction routes of Ti 3 C 2 T x /PEI nanocomposite toward Cr(VI) was studied by XPS, which confirmed the slow reduction of all sorbed Cr(VI) to Cr(III) in the dozens of hours and final in-situ Cr(III) immobilization, clarifying the sorption-reduction mechanism for Cr(VI) elimination. All these results suggest that Ti 3 C 2 T x /PEI nanocomposite prepared by reported surface-modification approach available for developing other functionalized adsorbents, may be a potential candidate for decontamination of Cr(VI)-polluted wastewater.
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2021
·
IF 9.594
Biao Ji,Shangwu Fan,Sijie Kou,Xiaoyu Xia,Juanli Deng,Laifei Cheng,Litong Zhang
Ti 3 C 2 T X MXene has been proven to be a material of high application potential in the field of electromagnetic (EM) protection. Considering the density, MXene/polymer films (MPFs) are fabricated by employing the simple tape casting process and exhibit excellent electromagnetic shielding performance with respect to the MXene content. However, the absorption properties of as-fabricated MPFs are not satisfactory due to the impedance mismatch. Herein, a multilayer impedance gradient absorber with MPFs arranged in order has been successfully designed and prepared. The developed absorber possesses excellent EM wave absorption properties owing to the well-matched impedance and adjustment of permittivity. Moreover, the effect of the thickness of MPFs on the EM wave absorbing properties has been investigated by theoretical calculations and experimental measurements. The HFSS calculation reveals that the effective absorption bandwidth is capable to cover the whole X-band (8.2–12.4 GHz) with only a micro-adjustment of the thickness, with the minimum reflection coefficient (RC min) reaching up to −26.10 dB. In addition, the synergistic effect of the multiple loss mechanisms has been discussed in detail. This study not only proposes the effective design of a novel multilayer impedance gradient absorber, but also provides new fundamental basis for combining the simulation technology and material design.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）