JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Xin Ling,Kaifeng Wang,Wang Zhang,Yu Wu,Qingjun Jin,Di Zhang
Electromagnetic pollution has become an increasingly important problem which has drawbacks to both the accurate operation of the electronic facilities and the safety of human beings. To alleviate and eliminate electromagnetic irradiation, it is inevitable to design microwave absorption materials with desirable absorption intensity and broad effective frequency bandwidth. The combination of carbon-based materials and magnetic materials is an adoptable strategy to perform remarkable microwave absorption performance, while the microstructure should not be ignored. Inspired by the electromagnetic response behaviors of the microstructure from the leafhopper, the hetero-microstructure with hollow void is constructed by adopting bimetal ZIF as the precursor, followed by an interfacial tailoring strategy through electrostatic assembling and calcinating process, which enhances the microwave absorption performance by integrating the merits between the components and the micro-structure. The minimum value of reflection loss achieved -76.40 dB at 7.50 GHz under filler loading of 20% with the thickness of 2.92 mm. Besides, the effective absorption bandwidth could be tailored from 3.55 to 18 GHz among different thicknesses as required. The bio-inspired strategy is validated as a promising method, exhibiting great potential in the designing of the next-generation microwave absorber.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Yujing Chi,Yuan Xu,Chenxiang Xu,Jiming Tian,Ying Li,Boxiang Gu,Haiyan Song,Han Zhang
Selective removal of 137Cs from nuclear wastewater is still a challenge due to the issues of efficient adsorbent exploitation and high concentrations of competitive ions. In this study, two-dimensional-layered Mxene Ti3C2Tx achieved the surface alkaline modification with KOH to be used as an efficient adsorbent for Cs+ removal from model wastewater. Hydroxyl-modified Ti3C2Tx obtained improved the delamination morphology and surface structure compared with the pristine Ti3C2Tx. In addition, the F species in Ti3C2Tx were efficiently removed and the hydroxyl groups were increased after modification. The adsorption efficiency of Cs+ over the hydroxyl-modified Ti3C2Tx was significantly enhanced, being attributed to the improvements in morphology, structure, and properties. 0.05 g of an optimal adsorbent achieved 90% removal of Cs+ with 5 mg·L–1 initial concentration in 50 mL of model wastewater within 5 min at ambient temperature and neutral conditions. Hydroxyl-modified Ti3C2Tx also exhibited high adsorption selectivity for Cs+ in the presence of competitive metal ions such as K+, Na+, Mg2+, and Ca2+. The mechanism study revealed that the ion exchange between [Ti–O]−H+/Cs+ mainly contributed to Cs+ adsorption, and the complexation between the oxygen-containing groups [Ti–O] in modified Ti3C2Tx and Cs was also involved. The hydroxyl-modified Ti3C2Tx was easy to regenerate and exhibited good recyclability for Cs+ adsorption.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Xiaoyu Zhao,Lixiao Zheng,Yongdan Hou,Yanfei Wang,Liang Zhu
Low-cost and highly efficient extraction of lithium from brine is the key to solving energy and environmental problems for sustainable development. The electrochemical lithium extraction method is of high selectivity , low energy consumption and environmental friendly. In this work, two innovations were proposed for electrochemical lithium extraction technology . Firstly, the layered Ti 3 C 2 -MXene was combined with a LiMn 2 O 4 (LMO) electrode to reduce the damage to the LMO crystal structure caused by manganese dissolution and the Jahn-Teller effect, and to greatly improve the lithium-ion transport rate and the cyclic stability of the electrode material . The good cyclic stability and high capacity were verified by XRD, SEM, and electrochemical tests before and after cycling. Secondly, the influence of four electric field controlling modes, namely constant current (CC) mode, pulse-rest(P10r2 and P10r10), pulse-rest-reverse pulse(P12r2R2), on the selectivity of lithium extraction was studied in simulated brine with an initial lithium/sodium ratio as low as 0.01. The results show that the Pulse Electric Field controlling method can effectively improve the lithium/sodium separation coefficient. Finally, an actual lithium extraction test was carried out in Atacama salt Lake brine with an initial Li/Na ratio of about 0.06. The Li/Na separation coefficient reached 1020 under the optimized electrode material structure and electric field mode. In conclusion, the application of LMO/MXene electrode under the pulse electric field mode is a highly selective method for lithium extraction with low initial lithium/sodium ratios.
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CELLULOSE
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2022
·Vol. 29
·期 12
·6997-7010
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IF 6.123
Huang Ling-Zhi,Yuan Qi,Ji Xing-Xiang,Li Dan-Dan,Zhang Wei,Guo Wen-Yan,Qi Meng-Yu,Ma Ming-Guo
The cotton fabric materials have gained widespread attention on account of their tailorable shape, flexible deformable, and lightweight in recent years. Nevertheless, there are still certain challenges in fabricating flexible, wearable, and multifunctional smart cotton fabric to satisfy versatile applications. Herein, the multifunctional smart cotton fabrics with different weave structures (plain weave, twill weave, and satin weave) were manufactured via decorating of two-dimensional (2D) carbides/nitrides (MXenes) nanosheets onto cotton fabric. The effects of cotton fabric with different weave structures on the load capacity of MXene were investigated, further exploring photothermal conversion performance and sensing performance. The MXene-decorated cotton fabrics exhibited excellent photothermal performance and mechanical double response performance. Thereinto, the MXene-decorated satin fabric (M-satin fabric) displayed ultrahigh photothermal conversion ability, its maximum equilibrium temperatures could reach 251.7 °C and 49.5 °C under 808 nm NIR laser (1.00 W cm −2 ) and 1 sun illumination (1.00 KW m −2 ), respectively. Moreover, the MXene-decorated satin fabric sensors also exhibited excellent responsiveness and rapid response time of ∼0.7 s. Thus, multifunctional MXene-based cotton fabrics have great promise in intelligent garments, wearable heater, and wearable electronics.
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Materials
·
2022
·Vol. 15
·期 13
·4543
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IF 3.748
Xin Feng,Mingjun Li,Jianming Wang,Xianrui Zou,Hongshui Wang,Donghui Wang,Huan Zhou,Lei Yang,Wei Gao,Chunyong Liang
It is critical to construct stimuli-responsive multifunctional nanoparticles for the drug delivery system for cancer treatment. Zeolitic imidazolate framework-8 (ZIF-8) has a large specific surface area and decomposes quickly under acidic conditions, which presents an excellent potential in pH-sensitive drug carriers. However, the mere chemotherapeutic drug loaded into ZIF-8 is a monotherapy and may restrict the therapeutic efficacy of malignancies. In this work, an effective nanoparticle-based delivery platform is established to simultaneously encapsulate doxorubicin (DOX) and MXene quantum dot (MQD) in ZIF-8 nanoparticles ([email protected]/DOX). Under near-infrared (NIR) laser (808 nm) and UV light (365 nm) irradiation,[email protected]demonstrates a high photothermal conversion efficiency and reactive oxygen species (ROS) production, which shows excellent photothermal therapy and photodynamic therapy effects. Furthermore, the release of DOX-loaded into[email protected]nanoparticles is significantly increased under NIR laser irradiation and at pH 5.6, indicating that acidic conditions and NIR laser irradiation can be effectively combined to stimulate the drug release. The cellular experiments show that[email protected]/DOX has an obvious killing effect on HeLa cells and achieves the combined anti-tumor effect of chemotherapy and phototherapy.Keywords:[email protected];chemotherapy;photothermal therapy;photodynamic therapy;anti-tumor
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JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Chao Feng,Kaiqin Ou,Zhipeng Zhang,Yongpeng Liu,Yunpeng Huang,Zicheng Wang,Yan Lv,Yue-E Miao,Yong Wang,Qianqian Lan,Tianxi Liu
MXenes are receiving growing attention in wastewater treatment , but the preparation of ultrathin MXene membranes with short water pathways on macroporous substrates for improving flux is challenging due to the deformation of the flexible MXene nanosheets . Herein, we demonstrate the fabrication of ultrathin MXene membranes by constructing an intermediate porous covalent organic framework (COF) layer. COF nanosheets are first vacuum filtrated on macroporous substrates to form a porous COF layer, followed by the vacuum deposition of MXene nanosheets to produce the dual-layered COF/MXene composite membranes . The COF layer provides a smooth surface with rich pores and good hydrophilicity for depositing MXene nanosheets, leading to the well-assembled MXene layer as thin as 8 nm. The ultrathin MXene layer and the porous COF layer enable the short water transport pathways, and the well-assembled MXene nanosheets guarantee the narrow interlayer nanochannels. Membranes thereby are endowed with high permeance of 563 L/(m 2 ·h·bar) and high rejection to congo red of 99.6%, outperforming other reported COF- or MXene-based membranes. This work suggests a facile construction strategy of ultrathin MXene-based composite membranes with high separation performances, which are highly desired in water treatment.
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ACS Applied Nano Materials
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2022
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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.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
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IF 6.76
Zhimin Xu,Yingxin Zhang,Huanyan Dai,Yu Wang,Yujie Ma,Shuang Tan,Bing Han
Obtaining a safe and reliable scaffold that can be rapidly fabricated and used for clinical bone defect repair has always been a challenge. In this study, polycaprolactone (PCL) composite scaffolds with various MXene (Ti 2 AlN) contents were prepared using 3D printing technology. The effects of different contents of Ti 2 AlN on the mechanical properties, hydrophilicity, cytocompatibility, and osteogenic differentiation ability were systematically studied and analysed. In vitro experiments showed that scaffolds containing 5% Ti 2 AlN ( [email protected] #Ti 2 AlN) obtained the best cell adhesion and proliferation ability and significantly upregulated the alkaline phosphatase (ALP) level. In vivo experiments of tibial defect repair in rats showed that the PCL scaffold containing 5% Ti 2 AlN ( [email protected] #Ti 2 AlN) could significantly promote the formation of new bone, and the experimental results of rabbit maxillofacial bone defect repair further proved that the [email protected] #Ti 2 AlN scaffold could effectively promote the repair of bone defects. Transcriptome analysis indicated that Ti 2 AlN may promote osteogenic differentiation by the Wnt/β-catenin signaling pathway and calcium-binding proteins. These findings suggest that Ti 2 AlN/PCL composite scaffolds with improved in situ bone repair ability represent an intelligent strategy for bone defect repair.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Ruichen Luo,Wen Zhang,Xin Hu,Ye Liang,Juan Fu,Meiying Liu,Fengjie Deng,Qian-Yong Cao,Xiaoyong Zhang,Yen Wei
MXene is a newly emerged two-dimensional material that has been extensively explored for different applications, including as adsorbents for adsorptive removal of environmental pollutants. However, the lack of active adsorption sites will inevitably impede their adsorption performance and surface functionalization is generally required. In this work, a novel MXene-based adsorbent (named as Ti 3 C 2 -SL) was fabricated by a simple substitution reaction using hexachlorocyclotriphosphazene (HCCP) as the linkage to conjugate amino groups terminated Ti 3 C 2 and sodium ligninsulfonate. Ti 3 C 2 -SL was examined as adsorbent for adsorption of doxorubicin hydrochloride (DOX) and many experiments were performed to evaluate different parameters on the adsorption behaviors. These experimental data were fitted and related parameters were calculated to study the adsorption kinetics and thermodynamics. Results demonstrated that DOX can be rapidly adsorbed by Ti 3 C 2 -SL and the adsorption capacity reached a relatively high value within 2 min. The maximum adsorption capacity after equilibrium is up to 190.78 mg g −1 , which is about four folds as compared with that of Ti 3 C 2 . The adsorption process is a spontaneous endothermic process and dominated by physical adsorption. All the above results suggested that Ti 3 C 2 -SL is promising for adsorptive removal environmental pollutants.
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Electrocatalysis
·
2022
·Vol. 13
·期 4
·469-478
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IF 2.933
Guo Shanshan,Jian Xuan,Hou Xiaodong,Wu Jianhong,Tian Bining,Tian Yue
Developing electrocatalysts with ultralow platinum (Pt) content for hydrogen evolution reaction (HER) is essential. In this work, we electrodeposited Pt nanoparticles on the composite carrier of polypyrrole (PPy) nanowires and MXene materials, thereby obtaining a catalyst with a mixed structure consisting of three materials with different dimensions, namely zero-dimensional (0D) platinum nanoparticles (Pt NPs ), one-dimensional (1D) PPy nanowires and two-dimensional (2D) MXene nanosheets. The PPy nanowires were compounded with MXene nanosheets, which enhanced the conductivity of the catalytic carrier and provided more active sites. The overpotential of the electrocatalyst with ultralow Pt loading (17.11 μg cm ‒2 ) is 40 mV when the current density is 10 mA cm −2 , which is very close to the commercial 20 wt% Pt/C (41 mV). The catalyst exhibits high turnover frequencies (2.21 H 2 s −1 in 0.5 M H 2 SO 4 ) at 100 mV and has relatively good stability due to the composite structural characteristics of 1D and 2D materials. This research provides a direction for the design and development of other MXene-based electrocatalysts and more conductive polymers.
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CARBON
·
2022
·
IF 11.307
Jianglin Diao,Jia Yuan,Zhihao Cai,Lun Xia,Zheng Cheng,Xiaoyan Liu,Wenle Ma,Shufang Wang,Yi Huang
High-performance electromagnetic interference (EMI) materials with remarkable thermoelectric conversion/self-powered capabilities seem to be predictably imperative to eliminate electromagnetic wave pollution and reduce local overheating of devices to ensure the reliable operation of electronic instruments and wearable electronic devices. Herein, multifunctional Bi 2 Te 2.7 Se 0.3 /Ti 3 C 2 T x (BTS/MXene) composites are fabricated by mixing BTS and MXene dispersion followed by vacuum-assisted filtration and hot pressing, which exhibit highest EMI shielding efficiency (EMI SE) of 94.33 dB and average EMI SE of 83.4 dB over the whole X band (BTS/MX-30, containing 30 wt% MXene). Meanwhile, the BTS/MXene composites also demonstrate impressive thermoelectric (TE) conversion capabilities, achieving a peak dimensionless figure of merit (ZT) of 1.2 from 313 to 498 K for BTS/MX-1.5 (involving 1.5 wt% MXene). The excellent electromagnetic wave shielding performances originate from the reflection caused by the impedance mismatch, the multiple scattering at the BTS/MXene interface, the polarization at the terminal of MXene and BTS, etc. On the other hand, the excellent thermoelectric performance of BTS/MXene comes from the high conductivity of MXene and the blocking of low-energy carriers and the scattering of phonons at the interface. Hence, multifunctional BTS/MXene composites display broad prospects for simultaneous implementation of EMI shielding and thermoelectric conversion/self-powered applications in miniature and wearable electronic instruments.
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RSC Advances
·
2022
·Vol. 12
·期 18
·11090-11099
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IF 4.036
Jiacheng Shi,Rui Shu,Xiuyuan Shi,Yunfei Li,Jiangge Li,Yi Deng,Weizhong Yang
Drug-free antibacterial strategies are of great significance for pathogenic bacterial infection treatment in clinical practice. Phototherapy with antibacterial function plays a vital role in mainstream germicidal research. However, phototherapy could lead to residual heat and excess reactive oxygen species (ROS), which are the main side-effects during antibacterial treatment. Unique CoFe2O4/MXene (CM) nanoenzymes, which were fabricated with electrostatic interactions, have been designed to conquer those challenges caused by side-effects of phototherapy in our research. The CM nanoenzymes possess many promising properties including photothermal and photodynamic induced phototherapy and mimic peroxidase (POD), glutathione oxidase (GSHOx), and catalase (CAT). Upon treatment with near-infrared (NIR) light, CM nanoenzymes can create a local high-temperature circumstance as well as raise bacterial membrane permeability. Furthermore, the photodynamic process and multi-enzyme-mimicking activities of CM enzymes boost the interbacterial ROS level. Herein, bacteria can hardly survive in synergistic phototherapy and multi-enzyme-mimicking catalytic therapy in vitro and in vivo. Meanwhile, the CM nanoenzymes exhibit excellent biocompatibility in vitro and in vivo. Overall, this research establishes a strong foundation for effectively employing nanoenzymes, leading to a new way to cure bacterial infections.
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