JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2026
·
IF 5.9
Qi-qi Jing,Zhi Huang,Yan-ying Liu,Qian Zhang
This work proposed a novel mechanism linking Cu(OH) 2 to MXene material, which promotes the development of 2D-dimensional material in TC degradation. • The optimized system enhances the efficiency by generating ·O 2 − and 1 O 2 , ·OH. ·O 2 − plays a significant role in TC degradation. • The catalyst maintain 87.94% activity over 4 times recycle, outperforming existing materials. • Performance of the strategy is friendly to environment, the metabolite is CO 2 and H 2 O. Ti 3 C 2 T x has emerged as a promising electrocatalyst for environmental remediation, yet its practical application is often limited by insufficient active site exposure and poor operational stability. In this study, we developed out-of-plane Cu-functionalized Ti 3 C 2 T x nanosheets (Ti 3 C 2 Tx@Cu) decorated with Cu(OH) 2 clusters of approximately 5-30 nm in size, which significantly enhance the electrocatalytic degradation of tetracycline hydrochloride (TC). Comprehensive theoretical and experimental analyses confirm that the spontaneously anchored Cu species not only improve electrical conductivity but also markedly boost catalytic activity. The optimized Ti 3 C 2 Tx@Cu catalyst achieves complete degradation of TC within 30 min, outperforming pristine Ti 3 C 2 T x. Mechanistic investigations reveal that the introduction of Cu promotes the predominant generation of superoxide radicals (·O 2 − ), shifting the degradation pathway from a combined effect of ·OH, ·O 2 − and 1 O 2 in the pure Ti 3 C 2 T x system to a ·O 2 − dominated process in the Ti 3 C 2 Tx@Cu system. This work provides an effective strategy for enhancing MXene-based electrocatalysts and underscores their potential in addressing antibiotic contamination, thereby contributing to public health and environmental sustainability.
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高影响因子
Nanoscale
·
2022
·Vol. 15
·期 6
·2624-2632
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IF 8.307
Weijia Liu,La Li,Guozhen Shen
Frequently used aqueous electrolytes in MXene-based Zn-ion hybrid microsupercapacitors (MSCs) limit their cycling and rate stability. The use of metal and nonmetal additives in electrolytes for the performance improvement of Zn-ion MSCs is considered a valid method. Herein, we propose an additive assisted Zn(CF3SO3)2 electrolyte as a redox-active electrolyte to prepare a flexible MXene-based Zn-ion hybrid MSC by a facile spraying method, and it consists of a conductive Ti3C2Tx–LiCl current collector and a Ti3C2Tx–DMSO cathode. In the process of the current density change (from 5 A cm−3 to 30 A cm−3 and then to 5 A cm−3), the capacity retention of the as-fabricated MSC with K3Co(CN)6 additive is over 99.0%, which is higher than 96.7% for the MSC with CKNSe additive and 82.3% for the MSC without an additive. Moreover, the designed MSC with the redox-active K3Co(CN)6 electrolyte exhibits a maximal capacitance retention of 70% after 5000 cycles. Furthermore, the flexible Zn-ion MSC with the Ti3C2Tx MXene cathode and a redox-active electrolyte was used to power a Ti3C2Tx based pressure sensor; the excellent press response of the integrated system not only provides insights into the development of large capacity and long-period stable energy storage devices, but also paves a new way for the development of capacitor-sensor integrated systems.
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高影响因子
COMPOSITES COMMUNICATIONS
·
2022
·
IF 7.685
Dan Wang,Yidong Peng,Jiancheng Dong,Lei Pu,Kangqi Chang,Xiu-Ping Yan,Hai-Long Qian,Le Li,Yunpeng Huang,Tianxi Liu
Thermally insulating and flame-resistant fibers/textiles have drawn enormous attention attributing to their great application prospects in personal thermal management and protective clothing. Nevertheless, conventional natural fibers and synthetic fibers are insufficient for advanced thermal regulation. Herein, an in-situ polymerization method and wet-spinning technique are employed for the continuous and scalable fabrication of polyimide (PI) aerogel fibers utilizing monolayered Ti 3 C 2 T x flakes as the pore-generating agents. Benefiting from the intimate interfacial interaction between MXene and the macromolecular chains, hierarchical porosity is constructed in the composite aerogel fibers due to the confinement of the interconnected PAA/Ti 3 C 2 T x networks during liquid-solid phase separation. As a result, the PI/Ti 3 C 2 T x aerogel fibers manifest significantly enhanced mechanical properties (tensile strength of 26 MPa), large specific surface area (145 m 2 g −1 ), excellent flame resistance, and remarkable thermal insulation performance (with a low thermal conductivity of 36 mW m −1 K −1 ), which can be readily weaved into flexible textiles for practical thermal regulating applications. This approach is expected to pave a new way for the fabrication and application of high-performance thermal insulating fibers and textiles.
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Acta Biomaterialia
·
2023
·
IF 9.7
Tao Liao,Zhongyin Chen,Ying Kuang,Zhe Ren,Wenqian Yu,Wen Rao,Linwei Li,Yun Liu,Ziqiang Xu,Bingbing Jiang,Cao Li
As a controllable, simple method with few side effects, near-infrared (NIR) light-based photothermal therapy (PTT) has been proven an effective cancer therapeutic approach. However, PTT-induced inflammation is a potential negative factor. And the overexpressed heat shock proteins (HSPs) by cancer cells can protect them from hyperthermia during PTT. In this work, small-size Ti 3 C 2 T x MXene nanosheets with high photothermal conversion efficiency in the region of NIR, high cargo loading capability and good free radical scavenging capability were chosen for cancer PTT and anti-inflammation. And (-)-epigallocatechin gallate (EGCG) was applied to form EGCG/Fe metal-polyphenol nanodots on the nanosheets. EGCG being released in acid cancer cells could reduce the expression of HSPs and could be used for anti-inflammation. As a result, the complex nanosheets named MXene@EGCG could achieve enhanced cancer PTT and be anti-inflammatory. Both in vitro and in vivo studies proved the good photothermal ability of MXene@EGCG and demonstrated that it could inhibit the expression of HSPs in tumor cells and relieve PTT-induced inflammation. Therefore, the nanosheets show good results in tumor ablation with a low level of inflammation, which provides another possibility for cancer therapy. Statement of significance Photothermal therapy (PTT)-induced inflammation plays an essential role in some important stages of tumor development and is unfavorable for cancer treatment. And hyperthermia leads to the overexpression of heat shock proteins (HSPs) in cancer cells, which limits the therapeutic effect of PTT. Therefore, we coated small-size Ti 3 C 2 T x MXene nanosheets with (-)-epigallocatechin gallate (EGCG)/Fe metal-polyphenol nanodots and named them as MXene@EGCG. This system shows a good photothermal conversion efficiency at 808 nm. And it can release EGCG in cancer cells to inhibit the expression of HSPs, thus achieving an enhanced cancer PTT. Both MXene and EGCG can also diminish the PTT-trigged inflammation. Both in vitro and in vivo studies prove the good anti-cancer PTT effect and anti-inflammation capability of MXene@EGCG.
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高影响因子
Science China-Materials
·
2022
·Vol. 65
·期 6
·1463-1475
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IF 8.64
Zheng Xiao,Wang Zhilong,Li Jinjin,Wei Liangming
The rechargeable aluminum-sulfur (Al-S) battery is a promising alternative-energy storage device with high energy density and made of cheap raw materials. However, Al-S batteries face several obstacles, especially the shuttle effect. Herein, a binder-free S@Ti 3 C 2 T x sandwich structure film with uniform sulfur dispersion was designed. The two-dimensional (2D) layered material Ti 3 C 2 T x not only has the function of binder and conductive agent but also is a promising host for sulfur anchoring. As a result, S@Ti 3 C 2 T x film showed an initial capacity of 489 mA h g −1 at 300 mA g −1 and retained the value at 415 mA h g −1 after 280 stable cycles, with an average Coulombic efficiency of ∼95%. The film displayed higher capacity and stability than the S + Ti 3 C 2 T x cathode prepared by the slurry-coating method (the initial capacity was 317 mA h g −1 and then decayed to 222 mA h g −1 after 160 cycles). The main capacity of S@Ti 3 C 2 T x film in the Al-S battery came from the reversible redox reaction of S 2− and S. This new 2D material combined with a controllable electrode structure design paves the way for the development of Al-S batteries.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 10
·5505-5519
·
IF 14.511
Xu Tian,Lijia Yao,Xiuxiu Cui,Rongjun Zhao,Ting Chen,Xuechun Xiao,Yude Wang
Two-dimensional nanomaterials have exhibited considerable potential for gas sensing applications in recent years owing to their unique physical and chemical properties such as a large surface-to-volume ratio, abundant edge sites, versatile surface chemistry, etc. Herein, we demonstrate a two-dimensional Ti3C2TX MXene@TiO2/MoS2 nanocomposite gas sensor for ammonia detection at room temperature. MoS2 nanosheets are grown on an etched Ti3C2TX MXene surface by a hydrothermal method, and rectangular TiO2 particles are derived from Ti3C2TX MXene in the hydrothermal process. Meanwhile, nanocomposites with different Ti3C2TX MXene additions are also designed for gas sensing performance comparison. Such a novel hierarchical structure based gas sensor (MTM-0.2 sensor) exhibits fast response/recovery time and excellent long-term stability to ammonia. Meanwhile, outstanding selectivity to ammonia against triethylamine, trimethylamine, n-butanol, acetone, formaldehyde, and nitrogen dioxide at room temperature is also shown. The sensor shows 1.79-fold and 2.75-fold enhancement in the gas sensing response toward 100 ppm ammonia compared with the pristine Ti3C2TX MXene and MoS2 gas sensors, respectively. And its detection limit for ammonia is 500 ppb. The sensing mechanisms of the Ti3C2TX MXene@TiO2/MoS2 nanocomposites toward ammonia are attributed to the layered nanostructure, p–n heterojunction created at the interface of p-type Ti3C2TX MXene and n-type MoS2. Finally, density-functional theory (DFT) is performed to investigate the adsorption behavior and charge transfer of ammonia molecules on the surface of the nanocomposite. The synthesized Ti3C2TX MXene@TiO2/MoS2 nanocomposite can be regarded as a promising candidate for high-performance ammonia detection at room temperature.
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Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 38
·14169-14179
·
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 ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zhao Du,Huayi Cai,Zhonglu Guo,Zhiyuan Zhao,Jing Lin,Yang Huang,Chengchun Tang,Guifeng Chen,Yi Fang
Herein, a series of novel Ti 3 C 2 T x /p-BN heterojunctions with excellent photocatalytic activity have been prepared by combining one-dimensional (1D) porous BN fibers (p-BN) with high aspect ratio and two-dimensional (2D) ultrathin Ti 3 C 2 T x MXenes for photocatalytic conversion of CO 2 -to-CO. Our results show that the optimized photocatalyst can photo-reduce CO 2 to generate CO under UV light with CO yield of 22.53 μmol g −1 h −1 , which is 4.3 and 20.1 times of p-BN (5.23 μmol g −1 h −1 ) and Ti 3 C 2 T x (1.23 μmol g −1 h −1 ), respectively. We demonstrate that the Ti 3 C 2 T x /p-BN heterojunction can combine the efficient CO 2 adsorption of porous p-BN and excellent electronic conductivity of Ti 3 C 2 T x . Moreover, the interfacial Ti-O-B bonds lead to strong interaction between p-BN and Ti 3 C 2 T x , resulting in the formation of Schottky heterojunction. The synergistic effect not only enables the adsorption of CO 2 by Ti 3 C 2 T x /p-BN heterojunction higher than p-BN, but also accelerates the transfer and separation of photogenerated carriers in p-BN, which finally exhibits promoted CO 2 photocatalytic activity. The present work pioneer the application of Ti 3 C 2 T x /p-BN heterojunction in photocatalytic CO 2 reduction and further guides the design of noble-metal-free photocatalysts.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 23
·6753-6760
·
IF 4.478
Zhang Huixin,Wang Lun,Zhuang Tingting,Wei Zhihao,Xia Jianfei,Wang Zonghua
Nanomaterial-derived quantum dots (QDs) are excellent electrochemiluminescence (ECL) luminophores and play an important role in optical sensing due to their excellent water solubility, good biocompatibility and tunable molecular size. In this work, a novel strategy was designed to form nano-hybrid Ti 3 C 2 QDs-AuNPs in situ as a luminophore based on the unique reducibility of Ti 3 C 2 QDs, which showed remarkable and stable ECL performance. Here, AuNPs were formed in situ without the addition of reducing agents and stabilizers, leading to threefold enhancement of the ECL signal of Ti 3 C 2 QDs due to their excellent charge transfer capability. Meanwhile, Ti 3 C 2 QDs-AuNPs with abundant Ti atoms also acted as recognition units. Through skillful combination with hybridization chain reaction (HCR) to expose more phosphate, an ECL platform was constructed to detect polynucleotide kinase (PNK) with good specificity and sensitivity. A lower limit of detection limit of 2.7×10 −5 U mL −1 was achieved, with a wide linear relationship ranging from 0.0001 to 10 U mL −1 . This novel strategy provides a guide for the application of nano-hybrid Ti 3 C 2 QDs-AuNPs as a luminophore in the field of ECL bioanalysis. Graphical abstract Novel in situ-formed nano-hybrid Ti 3 C 2 QDs-AuNPs were prepared as a luminophore, with threefold enhancement of the ECL signal of Ti 3 C 2 QDs.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jidong Bu,Wenqian Zhang,Yan Su,Lijian Xu,Shifeng Hou
In this study, we proposed in situ controlled preparation of 3D flower-like Ti 3 C 2 T x microspheres (FMXMSs) by water-in-oil (W/O) emulsion-assisted assembly. Polyethyleneimine (PEI), as a large molecule, can effectively stabilize the emulsion system. Ethylenediamine (EDA), as a weak cross-link agent, contains rich amino groups, which can effectively induce the assembly of Ti 3 C 2 T x in spherical droplets and eventually form 3D flower-like Ti 3 C 2 T x microspheres. By adjusting the water-oil volume ratio, the size of micro-emulsion droplets can be controlled, thus the structure and size of microspheres can finally be controlled. The structure has a large specific surface area (108.31 m 2 g -1 ) which can provide an effective ion diffusion pathway. As the supercapacitors electrode, the specific capacitance of FMXMSs is up to 224.57 F g -1 at 5 mV s -1 and 193.67 F g -1 at 0.5 A g -1 . Moreover, they also show good long-term cyclic stability. After 5000 cycles, the specific capacitance does not decay. The results indicate that W/O emulsion-assisted assembly is feasible for preparing MXenes microspheres with high electrochemical performance.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Min Sang,Shuai Liu,Wenwen Li,Sheng Wang,Jun Li,Ji Li,Shouhu Xuan,Xinglong Gong
Recently, multifunctional materials have attracted tremendous attention in intelligent equipment and human–computer interaction, requiring the integration of electrical conductivity, sensing property and heating management. Herein, conductive MXene is formulated and deposited on the PVDF film surface and followed by integrating PI tape to construct a multifunctional PVDF/MXene/PI wearable electronic. The PVDF/MXene/PI with sandwich structure shows ideal mechanical strength and tensile toughness. Based on the conductive MXene network, PVDF/MXene/PI composite possesses excellent mechanosensation ability, which can sensitively monitor different human movements. Besides, PVDF/MXene/PI composite presents prominent Joule heating capability and achieves a temperature of over 80 ℃ at 6.5 V voltage. Insulated high-temperature resistant PVDF and PI tape as protective layers ensure the stability and safety of PVDF/MXene/PI heater. Moreover, PVDF/MXene/PI composite exhibits outstanding electromagnetic interference shielding effectiveness of 40 dB. Finally, PVDF/MXene/PI multifunctional electronic with fascinating multi-functions shows potential applications in human thermotherapy, human–machine interaction and electromagnetic wave protection.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xianwei Geng,Chenguang Liu,Yi Sun,Yingchao Zhao,Ruowei Yi,Pengfei Song,Chun Zhao,Ivona Mitrovic,Li Yang,Cezhou Zhao
Lithium-sulfur (Li-S) batteries hold their promise in renewable next-generation energy storage technologies due to low cost and high theoretical energy. Herein, a Ti 3 C 2 T x MXene-carbon nanocage-sulfur (MXene/CNC/S) cathode is synthesized by a simple process with high conductivity and outstanding performance in Li-S batteries. The cathode with an unusually high sulfur content of 80% demonstrates an eminent initial specific capacity of 1275.5 mAh·g −1 at 0.1 C and retains 823.8 mAh·g −1 after 100 cycles, showing a high retention rate of 64.6%. Besides, it exhibits a great conductive feature for rate performance, delivering 630.5 mAh·g −1 capacity when the current rises to 4 C. In this composition electrode, the excellent electrochemical performance indicates that MXene can effectively adsorb polysulfides to help batteries achieve long-term cyclic performance. On the other hand, the introduction of CNC strongly improves the specific surface area of the cathode and constructs a high conductive network to reduce the stacking of MXene, thus exhibiting better rate performance and increasing utilization of sulfur. Our work holds future technological significance as it could accelerate progress towards lithium-sulfur batteries with high sulfur content and less pricy conductive materials.
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