Small
·
2024
·
IF 13
Xinbei Zhu,Jingkai Liu,Liyue Zhang,Weiwei Zhao,Yiyu Cao,Xiaoqing Liu
Solar thermal collectors based on phase change materials (PCMs) are important to promote the civilian use of sustainable energy. However, simultaneously achieving high photothermal efficiency and rapid heat transfer of the PCM carrier typically involves a high proportion of functional materials, contradicting a satisfying energy storage density. In this work, a surface-engineered anisotropic MXene-based aerogel (LMXA) integrated with myristic acid (MA) to produce phase change composites (LMXA-MA) is reported, in which the laser-treated surface composed of the hierarchically-structured TiO 2 /carbon composites act as a light absorber to improve solar absorption (96.0%), while the vertical through-hole structure allows for fast thermal energy transportation from surface to the whole. As a result, LMXA-MA exhibits outstanding thermal energy storage (192.4 J·g −1 ) and high photothermal conversion efficiency (93.5%). Meanwhile, benefiting from the intrinsic low emissivity of MXene material, thermal radiation loss can be effectively suppressed by simply flipping LMXA-MA, enabling a long-term temperature control ability (605 s·g −1 ). The excellent heat storage property and switchable dual-mode also endow it with an infrared stealth function, which maintains camouflage for more than 240 s. This work provides a prospective solution for optimizing photothermal conversion efficiency and long-term thermal energy preservation from surface engineering and structural design.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yiwei Yao,Yuan Ma,Chi Chen,Kai Zhu,Guiling Wang,Dianxue Cao,Jun Yan
Ti 3 C 2 T x MXene demonstrates excellent potential as an anode material for sodium-ion capacitors. However, the narrow interlayer spacing and self-stacking phenomenon limit its applicability. In this study, we demonstrate an easy two-step method involving freezing and crumpling of MXene nanosheets to improve their Na-ion storage via the addition of ammonium ions (referred to as FCM nanosheets). Flat MXene particles aggregate and undergo folding in an alkaline solution. Ammonium ions can penetrate the gaps between MXene nanosheets , expanding interlayer spaces and inducing the formation of folds. Compared to MXene nanosheets, FCM nanosheets exhibit improved ion transfer kinetics and additional high capacity owing to the intercalated ammonium ions. The manufactured FCM anode exhibits remarkable electrochemical properties, including a high specific capacity of 313 mAh g −1 and stability over 15,000 cycles.
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高影响因子
LANGMUIR
·
2024
·
IF 3.7
Wenshuai Jiang,Yaning Wang,Yuxi Wang,Wen Zhou,Jiefen Shen,Qingjun Liu
Nanocomposite films made from graphene oxide (GO) and MXene have a dense layered structure due to nanosheet self-stacking, limiting their dye adsorption performance. In this study, acid–base neutralization reactions are used to induce MXene/reduced graphene oxide (RGO) films bulging, which opens the stacked layer structure within the membrane and enhances MB adsorption performance. The effects of the pH, temperature, contact time, and initial concentration of MB on the adsorption performance are further investigated. The results indicate that the adsorption process conforms to the pseudo-second-order kinetic and Freundlich isotherm models and is heat-absorbing and spontaneous, and the MXene/RGO foams have an adsorption capacity of up to 1099.5 mg g–1 for MB. In addition, our study show that the MXene/RGO foams not only have better reusability, but also exhibit better adsorption for other dyes. The efficient MB removal is attributed to the increased specific surface area of the composite foams, increased active sites, strong electrostatic interactions between MB and the composite foams, as well as intercalation adsorption. These findings offer new options for solving dye effluent problems.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Ziqi Ren,Qixiang Zhang,Jianyu Yin,Peixue Jia,Wenzhong Lu,Qianqian Yao,Mingfang Deng,Yihua Gao,Nishuang Liu
Reverse electrodialysis (RED) technology, relying on ion-selective permeability membranes (ISPM), offers a direct means of harnessing osmotic energy from the salinity difference between seawater and freshwater. Critical technical challenges include limitations in ISPM's immobile charge carriers, transmembrane ionic internal resistance, and durability in water. Drawing inspiration from the subunit structure of the epithelial sodium channel (ENaC), an ISPM assembled using a supramolecular engineering strategy is introduced. This innovative approach enables the synergistic action of multiple molecular building blocks to mimic the distribution of ENaC subunit structures, strategically planning the placement of immobile charge carriers on nanofluidic channels. The design incorporates nano-confined oxygen-rich functionalized MXene (O-MXene) and high-strength polymer backbone aramid fibers to construct 3D nanofluidic channels with a high surface charge density. Enhanced by a bonding network of sodium carboxymethylcellulose, the ISPM achieved an exceptional output power density of 21.7 W m −2 and 46.0% energy conversion efficiency in a RED half-cell system using natural seawater and river water, surpassing current technologies. This research not only advances RED technology but also provides biomimetic customization concepts for ISPM design across various applications, including flow batteries, fuel cells, and related fields.
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COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Zhongjie He,Weirui Zhang,Jing Zhang,Jinliang Xie,Fangfang Su,Yuchen Li,Dongdong Yao,Yudeng Wang,Yaping Zheng
Graphene aerogels (GAs) exhibits immense potential in the field of electromagnetic interference (EMI) shielding due to their ultralow density, inherent conductive network, and porous structure. However, the optimization of structure and conductivity of GAs remains a significant challenge. To address this issue, a double template method was utilized to regulate the structure of graphene aerogel, resulting in a well-ordered hierarchical architecture. Subsequently, MXene was deposited on the surface of GA-1 through an immersion method to enhance the conductivity. The as-prepared MXene/graphene composite aerogel (MGA-10) showed excellent compression properties with ultra-high specific stress of 9.6 kPa cm 3 mg −1 at 80% strain. Besides, due to the unique structure, the GA-x/epoxy composite (GA-x/EP) demonstrated excellent EMI shielding performances of more than 45 dB in both the C-band and X-band. The increase in conductivity and the introduction of new interfaces caused by MXene deposition further improved the EMI properties of MGAs/EP. After 10 times of deposition, MGA-10/EP displayed an impressive EMI performance above 68 dB in both the C-band and X-band. Moreover, MGA-10/EP exhibited excellent photothermal conversion performance, making it highly suitable for applications such as anti-icing and deicing. This work provides a valuable idea for designing efficient EMI materials.
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MOLECULES
·
2024
·Vol. 29
·期 21
·5096
·
IF 4.2
Tao Tang,Xiaoyu Dou,Haoran Zhang,Hexu Wang,Ming Li,Guanghui Hu,Jianfeng Wen,Li Jiang
In recent years, halide perovskite materials have become widely used in solar cells, photovoltaics, and LEDs, as well as photocatalysis. Lead-free perovskite Cs 3 Bi 2 I 9 has been demonstrated as an effective photocatalyst; however, the fast recombination of the photogenerated carriers hinders further improvements of its photocatalytic activity. In this work, Ti 3 C 2 was composited with Cs 3 Bi 2 I 9 to promote the transfer and separation of photogenerated carriers, and thus the pollutant degradation efficiency was effectively improved. The visible-light photocatalytic reduction of Cs 3 Bi 2 I 9 /Ti 3 C 2 on rhodamine B (RhB), methylene blue (MB), and malachite green (MG) was as high as 97.3%, 96%, and 98.8%, respectively, improvements of almost 31.2%, 37.8%, and 37.2% compared to that of sole Cs 3 Bi 2 I 9 . Our study provides a simple way to enhance the photocatalytic activity of lead-free halide perovskites.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 24
·e55511
·
IF 2.7
Shuxin Zheng,Yuxiang Nie,Zhangzhong Wang,Xin Feng,Jiahua Zhu,Xiaohua Lu,Liwen Mu
This work presents a design of a unique “roller wheel” structure combining rigid MXene and flexible liquid metal (LM), aiming to construct an epoxy composite coating with simultaneous advanced mechanical strength and lubrication properties. The antiwear property of the epoxy composites is improved by 72.8% when the LM is 0.5 wt% and MXene is 0.03 wt%. The incorporation of LM-MXene improved the mechanical properties of the epoxy composite coating, resulting in an approximately 136.6% increase in elastic modulus. The unique “roller wheel” structure provides additional mechanical support and leads to lower adhesion between the MXene layers and LM. As a result, LM reduces the stripping and sliding of the interface between MXene layers during the friction process, further enhancing the lubrication performance of the epoxy composite coating.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jinqiu Chen,Xingman Hu,Zhuguang Nie,Yang Feng,Shuhua Qi,Rumin Wang
The development of flexible, thin, multifunctional materials represents a strategic advancement for the creation of next-generation wearables that offer both electromagnetic shielding and thermal management. This study introduces the fabrication of a multilayer MXene/polyimide (MXene/PI) composite film , demonstrating significant electromagnetic shielding effectiveness (EMI SE) and photothermal conversion efficiency through a layer-by-layer casting technique. When the MXene content is 29.7 wt%, the alternating multilayer MXene/PI composite film can reach a high EMI SE of 23.3 dB at 0.26 mm thickness, and when the MXene content is 45.7 wt%, the EMI SE can reach a maximum of 40.7 dB, which has a significant advantage over other materials. This superior performance exceed that of alternative materials, owing to the multilayer MXene construction that magnifies electromagnetic wave reflection losses. Furthermore, the film displays a rapid and sensitive photothermal response under laser irradiation , achieving temperatures up to 93°C at a 0.5 W/cm 2 density. Impressively, at 0.4 W/cm 2 , it maintains a stable long-term saturation temperature over 40 cycles, showing its potential in applications such as photothermal sensors, personal heating, and muscle protection.
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高影响因子
POLYMER
·
2024
·
IF 4.1
Si-yu Kong,Hao-wen Zhang,Ming-hua Cheng,Yuan Yu,Zhe-sheng Feng,Fanbin Meng,Yan Wang
With the rapid development of modern communication technology, the exploration of flexible wearable shielding fabrics with exceptional electromagnetic interference (EMI) shielding performance has emerged as an utmost priority to safeguard both human beings and electronic devices from the detrimental effects of electromagnetic radiation. Herein, a scalable multilayer stacking assembly method is proposed to prepare uniform MXene/CuNWs/Tartaric Acid (TA) composites-coated fabrics. MXene, as a new type of material, can achieve higher electron and ion transfer rates. However, it is prone to oxidation in air, leading to poor stability. Benefiting from the synergistic effect of tartaric acid, the MXene/CuNWs/TA-coated fabrics exhibit certain oxidation stability and corrosion resistance, while retaining the inherent flexibility and breathability of natural polymer textiles. Furthermore, the multilayer stacking structure works perfectly with the MXene/CuNWs conductive network, enabling multiple reflections and absorptions of electromagnetic waves internally, thus effectively diminishing energy transmission. The modified fabrics exhibit a low sheet resistance of 3.25 ± 0.12 Ω/sq and a good EMI shielding performance of 41.2 dB at X-band. Therefore, MXene/CuNWs/TA fabrics with high shielding performance are expected to reach their potential in wearable electronic products.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Haofei Sima,Bo Liu,Xiaolin Shi,Zifei Zhao,Chaozong Liu,Chunling Zhang
In light of the exponential growth of flexible human-computer interactions and telecommunications, it is becoming increasingly important to develop a high-sensitivity strain sensor to monitor human movement. Herein, the biocompatible, adhesive, and flexible Tannic acid-Fe 3 O 4 @MXene-poly(methacryloxyethyl sulfobetaine/acrylamide) (TFM) hydrogel has been prepared to realize the dual-functional applications in strain sensitive sensor and electromagnetic interference (EMI) shielding. The polymer network and 2D conductive filler MXene together construct the conductive network inside the hydrogel. The interpenetrating network and hydrogen bond between poly(acrylamide) and poly(methacryloxyethyl sulfobetaine) chain enhance the mechanical property of hydrogel, which is also improved by the complexation between Fe 3 O 4 and the catechol groups of tannic acid. Benefiting from the excellent electrical conductivity (∼1.33 S/m) and mechanical property of the TFM hydrogels, the strain sensor displays compressive strain (∼77.6 %) and elongation (∼308.5 %), adhesion (∼16 kPa), compression sensitivity (∼42.6 Pa −1 ), gauge factor (GF = 2.38), and cyclic stability (∼50 cycles). TFM hydrogels can monitor strain distribution sensing, pulse beating and human movement detection. Moreover, the TFM hydrogel exhibits an absorption-predominant EMI shielding performance with an effective value of ∼25.2 dB. This work provides a new inspiration for the development of multifunctional hydrogels in the fields of artificial intelligence, human-computer interaction, and EMI shielding technology.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Kang Li,Jiaoqun Zhu,Weibing Zhou,Lilong Sun,Shouqin Tian
To improve the photocatalytic performance of single-phase Bi 2 WO 6 , the heterojunction construction is usually employed to effectively separate and transport photo-induced carriers. Herein, MXene/Bi 2 WO 6 heterojunction (NB2 and VB2) with face-to-face contact and hierarchical structure was constructed by growing ultrafine Bi 2 WO 6 nanosheets on the surface of two-dimensional MXene (Nb 2 C and V 2 C) materials. Compared with the original Bi 2 WO 6 , the hybrids exhibited a larger specific surface area (42.17 m 2 ∙g −1 for NB2, 50.15 m 2 ∙g −1 for VB2), and displayed significant enhancements in the photodegradation of anionic MO (13.8-fold, 6.5-fold), cationic RhB (9.1-fold, 4.5-fold), and neutral phenol (8.5-fold, 6.1-fold), respectively. This is mainly attributed to the heterostructures via face-to-face coupling which can facilitate the tuning of the photoresponsive properties and internal energy level structure, as well as the generation of free radicals ( • O 2 - , • OH, and h + ) for the stepwise redox process in photodegradation. Therefore, this work is expected to expand the diverse use of Non-Ti 3 C 2 MXene in photocatalysis, meanwhile provide important guidance for the harmless treatment of organic pollutants.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Ran Chang,Huiqi Gao,Peng Hao,Hongqiang Qu,Jianzhong Xu,Jing Ma
Designing a functional filler in a polymer matrix for effective electromagnetic interference (EMI) shielding and flame retardancy is of great importance in electronic devices. Achieving optimized distribution of fillers in polymer to build a conductive network for EMI shielding and intact barrier for flame retardancy is still a great challenge since the reported fillers usually exist as a disorder or even aggregation state. Herein, a porous carbon nanotube (CNT) bridged MXene (MXene/CNT) skeleton with electrical continuity and barrier integrity was designed by using a facile freeze-drying method. Benefiting from the rich hierarchical pores and excellent conductivity of MXene/CNT, the obtained MXene/CNT supported epoxy (EP) composite exhibits an effective EM shielding value of 34.7 dB. Furthermore, the EP composite shows improved flame retardancy than pure EP. Specifically, compared to pure EP, the EP composite with a low content of MXene/CNT (1.7 wt %) shows a decreased heat release rate (19.17%), smoke production rate (22.73%), CO production rate (25.21%) and CO2 production rate (21.26%). This promising strategy provides a way to fabricate other advanced polymer composites.
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