JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Qijun Tang,Peiyao Xiong,Haiqiang Wang,Zhongbiao Wu
Photocatalytic CO 2 reduction to produce value-added products is considered a promising solution to solve the global energy crisis and the greenhouse effect. In this study, Ti 3 CN MXene was synthesized using a Lewis acidic etching method without the usage of toxic hydrofluoric acid (HF). Ti 3 CN MXene was then used as a support for the in situ hydrothermal growth of TiO 2 and Ru nanoparticles. In the presence of 0.5 wt% Ru, Ru-Ti 3 CN-TiO 2 shows CO and CH 4 production rates of 99.58 and 8.97 μmol/g, respectively, in 5 h under Xenon lamp irradiation, more than 20.5 and 9.3 times that of commercial P25. The enhancement in photocatalytic activity was attributed to the synergy between the in-situ growth of TiO 2 on Ti 3 CN MXene and Ru nanoparticles. It was proven experimentally that Ti 3 CN MXene can provide abundant pathways for electron transfer. The separation and transfer of the photo-induced charge were further increased with the help of Ru and Ti 3 CN MXene, leaving more electrons to participate in the subsequent CO 2 reduction reaction. We believe that this work will encourage more attention to designing environment-friendly MXene-based photocatalysts for CO 2 photoreduction using the non-HF method.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Fengfeng Jia,Jiayue Dong,Xiyi Dai,Yuanqing Liu,Haoran Wang,Zhaoqing Lu
Hybrid film in nanoscale with high-flexibility, excellent-mechanical properties and outstanding EMI shielding capacity are desirable for telecommunication systems and precision equipment in aerospace, artificial intelligence and military. Herein, copper nanowire/Ti 3 C 2 T x /aramid nanofibers (CuNWs/MXene/ANFs) hybrid film with uniform-blended, twin-layered and triple-layered structure were developed via in steps vacuum-assisted filtration approach. Benefiting from ANFs building blocks and pleasant interface bonding, the uniform-blended structure film with CuNWs/MXene content of 60 wt% exhibited high-flexibility with folding number of ∼ 2000 times and ideal stability in oxidation resistance and sonication treatment. In addition, due to the layered structure and primordial dense substrate, the triple-layered film with CuNWs/MXene content of 60 wt% demonstrated outstanding mechanical properties with tensile strength of 165.72 MPa and toughness of 15.59 MJ/m 3 , conductivity of 4475 S·cm −1 and specific EMI effectiveness of 9120.6 dB·cm 2 ·g −1 at thickness of 43 μm (over the whole X band). Particularly, the comprehensive performance of three types of film was synthetically evaluated in seven parameters including SSE/t, toughness, strength, conductivity, thickness, flexibility, and stability, which opened up new evaluation for advance EMI shielding film. The experimental results indicated that the uniform-blended film has excellent potential for efficient, robust, flexible, and stable EMI shielding applications in military, smart electronics and aerospace.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Shilu Luo,Tiantian Xiang,Jingwen Dong,Fengmei Su,Youxin Ji,Chuntai Liu,Yuezhan Feng
With the discovery of the two-dimensional (2D) MXene, it shows a great application potential in the field of electromagnetic interference (EMI) shielding, but the mechanical brittleness and easy oxidation of MXene limit its wide application. For this reason, a double crosslinking strategy is provided to solve the above problems in a nacre-like “brick-mortar” layered MXene/cellulose nanofiber (MXene/CNF) film. Typically, the film was firstly suffered by dopamine modification, then was further reinforced by secondary Ca 2+ bridging, so as to obtain excellent mechanical properties and antioxidative EMI shielding performance. Comparing with the single crosslinking, the double crosslinking strategy reveals a higher efficiency in improving the mechanical property. The mechanical strength and toughness of the double crosslinking MXene/CNF film can increase to 142.2 MPa and 9.48 MJ/m 3 , respectively. More importantly, while achieving good mechanical properties, the MXene composite film still holds a very stable EMI shielding performance of more than 44.6 dB when suffering from the oxidation treatment of high-temperature annealing, showing excellent anti-oxidation ability and environment tolerance. Therefore, this work provides a universal but effective double crosslinking strategy to solve the mechanical brittleness and easy oxidation of MXene-based composites, thus showing a huge potential in flexible EMI shielding applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Huiting Xu,Meng Li,Siqi Gong,Fan Zhao,Yang Zhao,Chunli Li,Junjie Qi,Zhiying Wang,Honghai Wang,Xiaobin Fan,Wenchao Peng,Jiapeng Liu
Capacitive deionization has attracted wide concern on account of its high energy efficiency, low manufacturing cost and environmental friendliness . Nevertheless, the development of capacitive deionization is still impeded because of the scarcity of suitable electrode materials with superior performance. Herein, we successfully prepared the two-dimensional (2D) titanium carbide (Ti 3 C 2 T x ) MXene/ reduced graphene oxide (rGO) superlattice heterostructure by a facile electrostatic self-assembly strategy and systematically investigated its performance as capacitive deionized electrode materials. The unique 2D/2D superlattice heterostructure not only effectively alleviates the self-stacking problem of Ti 3 C 2 T x MXene nanosheets , but also endows the heterostructure with superior conductivity and fast ion diffusion rate. As a result, the MXene/rGO superlattice heterostructure exhibits an outstanding salt (Na + ) adsorption capacity (48 mg g − 1 ) at 1.2 V significantly superior to pristine Ti 3 C 2 T x MXene nanosheets, along with outstanding long-term cycling performance. Furthermore, the mechanism involved was elucidated through comprehensive characterizations. Therefore, this study offers a new pathway for designing high-performance electrode materials for capacitive deionization.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Qi Wang,Yu Mei,Ruoxue Zhou,Sridhar Komarneni,Jianfeng Ma
The Ti 3 C 2 -based MXene with unique lamellar nanostructure and high conductivity is expected to effectively improve photocatalytic ability of composites as a cocatalyst. Herein, two dimensional Ti 3 C 2 -based MXene nanosheets decorated with copper sulfide particles (CuS@MXene) were synthesized by hydrothermal treatment to boost catalytic persulfate (PS) activation under light, exhibiting remarkable reactivity and stability for the rapid removal of Orange II. The phase composition of CuS@MXene was detected by X-ray diffraction (XRD), the morphology of CuS@MXene was characterized by scanning electron microscope (SEM), and the results of X-ray photoelectron spectroscopy (XPS) proved the elemental composition and valence state of elements in the CuS@MXene. The dosage of PS and initial pH of solution were the main factors affecting the removal rate of Orange II, and the quenching experiment showed that 1 O 2 was the primary reactive species for the removal of Orange II in CuS@MXene -PS system. In addition, this study showed that CuS@MXene provided bi-active centers for PS activation, which was mainly attributed to the rapid charge transfer between dual electron-rich active centers of Cu and Ti. This system may be applicable to the degradation of other challenging organic pollutants .
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Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 38
·14169-14179
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IF 8.067
Zhenping Ma,Hui Feng,Yongbao Feng,Xin Ding,Xianzhen Wang,Wei Wang,Xiaojie Zhang,Shuo Kong,Xiong Lan,Qiulong Li
Lightweight high-performance electromagnetic interference (EMI) shielding materials with excellent thermal conductivity and outstanding EMI shielding performances are highly satisfactory for modern integrated electronic and telecommunication systems in the fields of military, aerospace, smart and wearable electronics, and artificial intelligence. Herein, we prepared a cellular MXene@silver nanowire (Ag NW) composite film by a simple vacuum-assisted filtration process induced by potassium ions and freeze-drying after rapid pre-freezing with liquid nitrogen. The construction of the cellular structure can effectively improve the shielding effectiveness. Upon introducing the Ag NWs in the system, the interconnection networks were constructed for the MXene@Ag NW composite film, which significantly improved the electrical and thermal conductivity, further enhancing EMI shielding performance. The composite film with 80 wt% Ag NWs can deliver a high conductivity of 1245 S cm−1, ultrahigh EMI shielding efficiency (SE) of 81.11 dB in the X-band, and a high thermal conductivity of 26.19 W m−1 K−1. The prepared MXene@Ag NW cellular composite film has the advantages of high shielding efficiency and good thermal conductivity, which has important application value in manufacturing lightweight, high shielding efficiency materials and avoiding heat accumulation of electronic devices.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 31
·16430-16438
·
IF 14.511
Yanchao Xu,Wentian Zhang,Zhiwen Li,Liguo Shen,Renjie Li,Meijia Zhang,Yang Jiao,Hongjun Lin,Chuyang Y. Tang
Incorporating 2D nanochannels of stacked nanosheets into a polyamide membrane has great potential to improve membrane permeability. However, reported 2D nanochannels are usually perpendicularly aligned to the water transport path direction, which results in an extremely tortuous water flow path and limits membrane performance. Herein, we demonstrated that the 2D nanochannels in 3D accordion-like MXene (AMXene) particles could be facilely incorporated in a polyamide matrix in a random orientation by continuous vacuum assisted assembly and interfacial polymerization on a porous substrate. The incorporation of the AMXene particles can significantly increase the effective area for water collection below the PA layer. In addition, the 2D nanochannel orientation endowed the membrane with much straighter water transport paths. These effects contribute to an ultra-higher membrane water permeance of 24.1 L m−2 h−1 bar−1, which was 210% that of the control membrane without AMXene, and maintaining a higher Na2SO4 rejection of 97.1%. This study provided new insights into rationally engineering nanochannels in polyamide membranes for water treatment.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Yu Wang,Feng Gu,Lei Cao,Lanlan Fan,Tianjie Hou,Qian Zhu,Yu Wu,Shixian Xiong
Developing non-noble metal oxygen reduction reaction (ORR) electrocatalysts with high performance, excellent stability, and low-cost is crucial for the industrialization of fuel cells. Herein, trace level Co modified 3D hybrid titanium carbonitride MXene and boron-carbon-nitrogen nanotubes catalyst (TiCN–BCN–Co) is fabricated by spray-lyophilization and high-temperature pyrolysis . This strategy not only avoids the oxidation of Ti 3 C 2 T x MXene, but also introduces nitrogen atoms into the titanium carbide lattice to form a more electrocatalytically active TiCN crystal phase. The obtained TiCN–BCN–Co exhibits superior ORR catalytic activity with a positive half-wave potential of 0.83 V vs. RHE and outperforms commercial Pt/C in terms of stability and methanol tolerance. Impressively, the Zn-air battery with TiCN–BCN–Co cathode achieves a superior specific capacity of 791 mAh g −1 and long-term stability of 200 h.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Biaobiao Yan,Man Zhou,Yuanyuan Yu,Bo Xu,Li Cui,Qiang Wang,Ping Wang
In this work, a hybrid coating of mussel-inspired dopamine and MXene was successfully prepared, and deposited on the cotton fabric surface uniformly to construct a multifunctional textile. Depending on the unique adhesion of polydopamine (PDA), the MXene coating is orderly self-stacked on the fabric surface with antioxidation and a high conductivity close to 300 S/m, further hydrophobic modification endows the fabric with excellent self-cleaning ability. Subsequently, a personal thermal management system consisting of solar, Joule and low-radiation heating components that can switch modes flexibly according to the scenario is constructed, which facilitates the wearable warm fabric to cope with complex environments. Meanwhile, the MXene@PDA-decorated fabric provides electromagnetic interference (EMI) shielding efficiency of exceeding 55 dB and thermal camouflage ability. With an easy-to-operate preparation process, long-time durability, MXene@PDA-decorated fabric exhibit great potential for manufacturing flexible, wearable, multifunctional personal precision thermal management textile devices.
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COMPOSITES PART B-ENGINEERING
·
2022
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IF 11.322
Xiaoming Wang,Xinliang Wang,Juanjuan Yin,Na Li,Zhenlin Zhang,Yawen Xu,Lexin Zhang,Zhihui Qin,Tifeng Jiao
MXene-based conductive hydrogels have attracted immense interest as sensing materials for flexible wearable sensors due to their mechanical flexibility and high sensitivity. However, the low stability of MXene in aqueous media severely deteriorates the performances of MXene-based conductive hydrogels. Meanwhile, for their applications in advanced sensors, high mechanical strength , good environmental stability, self-adhesiveness, multiple sensory function combined with biodegradability are vital but can be rarely met in one platform. Herein, we first prepare stable MXene/gelatin dispersion by encapsulating MXene with gelatin to hinder restacking and oxidation of MXene nanosheets in water. Based on the MXene/gelatin dispersion, a high-strength and conductive MXene-composited gelatin (MCG) organohydrogel with excellent environmental stability and self-adhesiveness is fabricated by simply soaking the MCG pre-hydrogel in tannic acid (TA) water/glycerol solution. This design allows the formation of both multiple supramolecular crosslinked interactions and water/glycerol binary solvent system. The prepared MCG organohydrogel derived from natural constituents exhibits outstanding mechanical properties (such as high tensile strength and stretchability), excellent freezing resistance, moisturizing retention properties and self-adhesiveness, yet degrades fully when disposed. The resultant MCG hydrogel-based versatile sensors exhibit both high strain-sensitivity and thermosensitive capacities, realizing the application in the measurement of human motion and body temperature, providing a promising route to fabricate degradable sensing materials combined with all the favourable attributes for advanced electronics.
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高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 17
·9235-9249
·
IF 6.123
Wang Kaili,Li Xiaoran,Peng Haozhe,Dong Youming,Li Yanjun,Liu Xiaorong,Li Jianzhang
It is of great practical significance to prepare high-performance biopolymer composite films from renewable resources to replace ubiquitous petrochemical plastics. However, the unsatisfactory mechanical properties and single functionality of bio-polymers make them unable to meet the requirements of practical application. Herein, the tough, strong and renewable soy protein isolate (SPI) composite films with outstanding photothermal conversion and UV-blocking performance were prepared by facile blending and casting methods with integration of cellulose nanofibrils (CNF)@MXene hybrid nanosheets as reinforcers and branched polyethyleneimine (PEI) as a plasticizer. The resultant SPI/PEI/CNF@MXene films presented outstanding mechanical properties i.e., tensile strength of 17.31 MPa, toughness of 16.01 MJ/m 3 , high strain at failure of 114.10%. Furthermore, the SPI/PEI/CNF@MXene films can almost block 100% of UV spectrum and also exhibit satisfactory photothermal driven conversion. These comprehensive properties make it have great potential application as mulching films, packaging engineering, and UV-blocking fields.
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高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Qianqing Wu,Zhenhui Li,Qianwei Liang,Rongkai Ye,Shuzhou Guo,Xiaobing Zeng,Jianqiang Hu,Aiqing Li
MicroRNAs (miRNAs) are considered as potential biomarkers for early diagnosis and prognostic assessment of diabetic nephropathy. In this work, an electrochemical biosensor for ultrasensitive detection of miRNA-377 was constructed based on MXene-Au nanocomposites and G-quadruplex nano-amplification strategy. As a promising nanocarrier, taking advantage of leveraging synergistic effects between Au nanoparticles (AuNPs) and MXene nanosheet, MXene-Au nanocomposites exhibited excellent electronic conductivity and provided massive active sites for DNA capture probe immobilization by Au-S bonds. AuNPs modified with Guanine-rich sequence DNA detection probes were designed as signal amplification nano-labels. Specifically, by inducing the transition of Guanine-rich detection probes to G-quadruplex, the strong affinity interaction between methylene blue and G-quadruplex could not only reflect trace concentration information of miRNA-377, but also lead to the further enhancement of electrochemical signal (2.7-fold). As a result, this newly designed biosensor exhibited superior sensing performance with a wide linear range from 10 aM to 100 pM and the limit of detection was as low as 1.35 aM. Compared with biosensors based on other nanocomposites and reported miRNA-377 biosensors, the proposed sensing platform did not require any thermal cycling or reverse transcription process, meeting the miRNA sensing requirements of convenient, sensitive, specific and stable. Furthermore, the as-constructed biosensor also displayed good selectivity, which was applied to accurate detection of miRNA-377 in human serum samples with satisfactory sensitivity, suggesting the biosensor system has promising applications in biological researches and early clinical diagnosis for diabetic nephropathy.
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