TALANTA
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2025
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IF 6.1
Yuting Zhuang,Mengqi Jian,Huiqi Yan,Xin Lv,Yue Zhang
Selenium is a nutritionally essential trace element for human health, but efficient or excessive intake both causes physiological diseases. Here, we propose that selenium as a brightening agent significantly increase the peroxidase (POD)-like activity of MXene@CeO 2 , which CeO 2 nanoparticles in-situ grow on MXene as the sensing platform. Based on the selenium-stimulated POD-like activity of MXene@CeO 2 , a simple, low-cost, and reliable colorimetric method is constructed for quantitative analysis of selenium. The great advantage of MXene@CeO 2 platform selecting selenium as brightening agent exhibits good selectivity for other 23 interfering ions, allowing the discrimination of selenium in practical samples rapidly and precisely even at 3.5 nM. Moreover, MXene@CeO 2 platform selectively catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) instead of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium (ABTS) under the same condition. This study not only offers a utility sensing platform for quick detection of selenium but also opens an avenue for the rational design of element sensors for point-of-care application.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Lijun You,Zhijuan Zheng,Wenjing Xu,Yang Wang,Weijie Xiong,Caihua Xiong,Shaoyun Wang
Conductive hydrogels become increasing attractive for flexible electronic devices and biosensors. However, challenges still remain in fabrication of flexible hydrogels with high electrical conductivity, self-healing capability and adhesion property. Herein, a conductive hydrogel (PSDM) was prepared by solution-gel method using MXene and dopamine modified polypyrrole as conductive enhanced materials, polyvinyl alcohol and silk fibroin as gel networks, and borax as cross-linking agent. Notably, the PSDM hydrogels not only showed high permeability (13.82 mg∙cm −2 ∙h −1 ), excellent stretch ability (1235 %), high electrical conductivity (11.3 S/m) and long-term stability, but also exhibited high adhesion performance and self-healing properties. PSDM hydrogels displayed outstanding sensing performance and durability for monitoring human activities including writing, finger bending and wrist bending. The PSDM hydrogel was made into wearable flexible electrodes and realized accurate, sensitive and reliable detection of human electromyographic and electrocardiographic signals. The sensor was also applied in human-computer interaction by collecting electromyography signals of different gestures for machine learning and gesture recognition. According to 480 groups of data collected, the recognition accuracy of gestures by the electrodes was close to 100 %, indicating that the PSDM hydrogel electrodes possessed excellent sensing performance for high precision data acquisition and human-computer interaction interface.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Yu Jiang,Rong Yang,Chaojiang Fan,Xin Dong,Hongyu Shang,Lei Mao,Bailing Jiang,Yinglin Yan
As one of the most important prerequisites for the practical application of lithium-sulfur (Li-S) batteries, the efficient utilization of active materials still meets the challenge to activate the dissolved polysulfide between the cathode side and the separator. The MXene has metallic centers and rich surface functions to anchor polysulfides, which prevent the shuttle of polysulfides, is widely used in Li-S batteries. However, the self-stacking defects of MXene hinder its chemisorption and catalytic of polysulfides. Here, a plain, scalable additive plug-in scheme was designed for MXene, and the self-supporting film obtained by dual-intercalation supplied an interlayer for Li-S batteries. The macromolecular cetyltrimethylammonium bromide is used to open the layer distance of MXene and expose the catalytic sites, and the nanometer carbon nanotubes are employed as the second insertion to distribute the conductive carbon networks on the MXene nanosheets to physically confine the polysulfides. The functional interlayer carries adsorption and catalytic activities toward polysulfides conversion. Therefore, the Li-S batteries with the interlayer had an initial discharge specific capacity of 1491.8 mA h g −1 at 0.1 C, and an ultra-low-capacity decay of 0.038% per cycle after 500 cycles at 1 C. This work provides an effective strategy on MXene to construct functional intermediate layer for Li-S batteries to hinder the shuttling effect and catalyze the redox conversion of the polysulfides.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Kaifang Wang,Danlin Chen,Jiali Tang,Zihao Hong,Zhongtai Zhu,Ziyi Yuan,Zhihong Lin,Yuqi Liu,Raphael Semiat,Xuezhong He
Membrane gas separation technologies have emerged as highly prospective avenues for the selective separation of CO 2 . In this research, a novel array of mixed-matrix membranes (MMMs) was engineered, integrating two-dimensional nanosheets of MXene, specifically Ti 3 C 2 T x , into polymers of intrinsic microporosity (PIMs) to selectively separate CO 2 from N 2 . The inclusion of Ti 3 C 2 T x nanosheets, rich in polar functional groups, significantly increases the affinity between CO 2 molecules and the fabricated MMMs. Additionally, the precise modulation of the molecular diffusion channels for CO 2 and N 2 is achievable due to the interlayer spacing between MXene layers (∼0.35 nm) within the PIM-1 matrix. This innovation is predicated on the synergistic effect of solution-diffusion and molecular sieving mechanisms that underpin the gas separation process, leading to a marked improvement in both selectivity for CO 2 over N 2 and the permeability of CO 2 . Among the series, the MMMs with a 0.5 wt% MXene display exceptional separation efficiency, achieving a CO 2 permeability of 12475.3 barrer and a CO 2 /N 2 selectivity of 32.7. Notably, all the PIM-1/MXene membranes prepared with different compositions in this study exceed the Robeson upper bound defined in 2019, indicating their substantial promise for CO 2 separation and capture in industrial applications.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zezhou Zhang,Wansheng Li,Boyu Zhao,Xiuying Yang,Chennan Zhao,Wenyi Wang,Xiangdong Yang,Ao Shen,Meiqi Ye
Self-assembled composite membranes are increasingly acknowledged for their potential in wastewater treatment due to their superior selectivity, high operational efficiency, and environmental sustainability. Nonetheless, challenges such as inadequate removal efficiencies for low molecular weight dyes and significant membrane fouling restrict their broader industrial application. To address these challenges, a structurally stable composite membrane of sodium lignosulfonate carbon nanotubes/alkalized MXene (SLS-CNT/alk-MXene) has been engineered. This membrane employs a polyethersulfone substrate pretreated with dopamine for uniform nanoparticle assembly through a layer-by-layer self-assembly technique. The manufacturing process includes hydrophilic modification of carbon nanotubes with lignosulfonate, followed by alkalization of MXene using sodium hydroxide. Performance evaluation of the M2 composite membrane, with a content ratio of SLS-CNT to alk-MXene of 4:2 by weight, revealed outstanding membrane properties. It achieved high selective permeability, with over 99 % retention efficiency for Methyl Blue and Congo Red, and a permeation flux of 51.6 L m -2 h −1 bar −1 . This membrane efficiently degraded various organic dyes within 1h, including Methyl Orange, Methylene Blue, Malachite Green, and Rhodamine B, and thanks to the integration of electrocatalysis with membrane separation, while maintaining a low membrane resistance of only 813 Ω. After environmentally sustainable testing, the membrane displayed excellent stability and 80 % recovery capacity, presenting a novel approach and design blueprint for enhancing clean water resources and environmental protection.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yueer Ma,Zhao Zhang,Wei Chen,Qianlin Zhang,Shuai Chang,Mei Pan,Xingqiang Lv,Hui Chang
A novel synthetic strategy is proposed to create high zero-valent platinum (Pt) components, sub-nanometer Pt clusters, and three-dimensional (3D) Pt/ nitrogen-doped MXene (N-Ti 3 C 2 T x ) catalyst through electrostatic self-assembly combined with non-in-situ doping pyrolysis. Compared with the primary Pt/Ti 3 C 2 T x , the N-doped Pt/N-Ti 3 C 2 T x , which has a 3D wrinkled porous structure, increases the residence time of methylcyclohexane (MCH) on the catalyst surface during gas–solid reactions and improves the mass transfer efficiency of MCH. In addition, the N-doped Pt/N-Ti 3 C 2 T x , which optimizes the electronic coordination environment, produces sub-nanometer Pt clusters, in which Pt mainly exists as Pt (0) (80.78 %) and avoids the presence of low catalytic activity Pt (IV). The Pt 0.5% /N-MXene catalyst exhibits significant catalytic performance in the dehydrogenation of MCH in a fixed-bed reactor, with a hydrogen evolution rate of 636.30 mmol·g Pt -1 ·min - 1 , which significantly surpasses 176.60 mmol·g Pt -1 ·min - 1 for N-undoped Pt 1% /MXene and 78.13 mmol·g Pt -1 ·min - 1 for commercial Pt 1% /TiO 2 . Density functional theory calculations, Pt/N-Ti 3 C 2 T x exhibits lower Pt electronic states and has a d -band center closer to the Fermi level than Pt/Ti 3 C 2 T x . This configuration leads to the stronger MCH adsorption on the Pt sites of Pt/N-Ti 3 C 2 T x , promoting faster H 2 generation and release, thereby achieving a higher catalytic activity.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2024
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IF 5.9
Tiantian Lv,Jiarong Zhang,Long Yu,Ya’nan Zhao,Tianran Zhao,Yi’na Yang,Chunna Yu,Chang Zhao,Guangjian Xing
The contamination of wastewater by organic pollutants significantly impacts human health and the environment due to their carcinogenic nature and various adverse effects. To address this issue, this study offers a high-efficiency and low-cost biomass-based carbon aerogel adsorbent, which was prepared through the hydrothermal carbonization of loofah, followed by Ti 3 C 2 T X MXene impregnation. The aerogel features a porous three-dimensional network structure and a substantial specific surface area, facilitating broad-spectrum adsorption capabilities for various dyes and drugs. The aerogel achieved impressive adsorption capacities of 175.29 and 75.73 mg/g for cationic methylene blue and Rhodamine B dyes, and 106.33 and 93.29 mg/g for anionic methyl orange and Congo red dyes, as well as 86.25 mg/g for tetracycline hydrochloride, surpassing other reported biomass-based aerogels. Furthermore, it demonstrated effective decolorization ability for wastewater containing mixed dyes. Notably, it exhibited excellent recycling and regeneration properties, maintaining a high removal rate after multiple cycles of adsorption–desorption. The adsorption process of dye/drug by the aerogel followed Langmuir’s monomolecular layer adsorption model, exhibiting spontaneous, endothermic, and disorder-increasing behavior in alignment with the pseudo-second-order kinetic model. This study presents an efficient biomass-based aerogel for the removal of organic pollutants from wastewater.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yingjie Niu,Ziqi Wang,Yuan Li,Bichan Huang,Teng Ma,Xuanbo Jiang,Hui Cheng,Kaifu Zhang,Chenglin Yi
Lightweight and ultra-thin conformal shielding films can be directly integrated on the surfaces of complex structures without occupying additional three-dimensional (3D) space, holding considerable promise for protecting sensitive precision electronic equipment. Here, titanium carbide/silver (MXene/Ag) nanocomposites were synthesized through electrostatic adsorption and in-situ self-reduction, and subsequently combined with Ag ink to create a MXene/Ag-Ag hybrid ink optimized for aerosol jet printing (AJP). The introduce of ethylene glycol based solvent system largely prevents the aggregation of aerosolized hybrid ink particles and reduce the overspray as well. This hybrid ink exhibited a printing resolution of ∼ 10 μm and excellent electrical stability, with only a 4.8 % increase in resistance of the printed trace after 1000 bending cycles. The internal pores and heterogeneous interfaces of MXene/Ag formed after sintering process significantly enhanced the electromagnetic wave absorption of the film. The specific electromagnetic interference (EMI) shielding effectiveness (SE) (SSE/t, defined as the ratio of EMI SE to the density and thickness) of the MXene/Ag-Ag film reaches 52591.4 dB·cm 2 /g at a thickness of merely 500 nm with only 0.9 mg weight increment. Simultaneously, the successful fabrication of high-quality conformal films on various complex substrates showcases the advanced manufacturing capabilities of AJP. Moreover, the utilization of the shielding film in practical applications, including electric field shielding, wireless charging, and near-field communication (NFC) interruption, highlights the potential of AJP technology for the fabrication of integrated conformal EMI shielding electronics with custom-designed structures.
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CARBOHYDRATE POLYMERS
·
2025
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IF 12.5
Qi Ao,Lin Jiang,Jun Tang
Biodiesel, a renewable bio-based transport fuel consisting of alkyl esters of long-chain fatty acids, is gaining attention as an alternative to non-renewable petroleum diesel. We prepared adjustable interlayer spacing urea-crosslinked 3D graphene oxide/MXene-SO 3 /cyclodextrin (MGUC) film to achieve efficient and sustainable biodiesel production. Ti 3 C 2 T X (MXene) grafted sulfonic acid groups as acid-catalytic sites of the film with graphene oxide (GO) via urea cross-linking and doping cyclodextrin (CD) to construct multistage pore structures (internal pore structures generated by urea cross-linking as well as CD host-guest structures) synergistically catalyzed biodiesel production. Meanwhile, the heterogeneous carbon-based materials based on GO and MXene-S have excellent photothermal efficiency, which can achieve 95.6 % biodiesel conversion at 4 h and maintain 75.32 % activity after 8 cycles. We verified the reason for the high catalytic activity of the MGUC films, which rationalized the fast mass transfer mechanism of CD by Density functional theory (DFT)and verified the transport mechanism of the heterojunction for efficient photothermal. Therefore, this CD carbon-based solid acid film catalytic platform provides a new direction for the green and efficient preparation of bioenergy.
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CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Ying Liu,Yubo Zhao,Changtu Ma,Min Zhao,Huayun Du,Yang Ge,Jianlong Ji,Kexun Li,Yanxia Wu
Ti 3 C 2 T x MXene has been regarded as a promising candidate for advanced microwave absorption materials. However, the microwave absorbing performance of Ti 3 C 2 T x MXene is suppressed by the single dielectric loss mechanism and impedance mismatch because of the high conductivity. To effectuate a good absorption capability of Ti 3 C 2 T x MXene, this paper constructs a heterostructured Co/Ti 3 C 2 T x hybrid by atomic layer deposition of magnetic Co nanoparticles on Ti 3 C 2 T x nanosheets . The microstructures, magnetism , and microwave absorption behaviors of the Co/Ti 3 C 2 T x hybrids are investigated systematically. The results show that the frequency-dependent electromagnetic parameters of the Ti 3 C 2 T x MXene become tunable by controlling the content of Co decorations, which are conducive to both magnetic loss and impedance matching . The Co/Ti 3 C 2 T x hybrid with ultralow Co decoration content (only 1.52 wt%) achieves the minimum reflect loss of −54.32 dB at a thin matched thickness of 1.29 mm, and the corresponding effective absorption bandwidth with reflection loss below −10 dB reaches 4.29 GHz. The atomic layer deposited magnetic metal nanostructures provides an effective strategy for preparing MXene-based hybrids which not only have high absorption efficiency but also significantly reduce the use of magnetic metals.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
·
IF 11.2
Jian Zhang,Chen Shao,Zhen Lei,Yuanchun Li,Haina Bai,Lanhe Zhang,Guangqin Ren,Xinyan Wang
Due to inherent limitations such as high carrier recombination efficiency, limited active sites, and suboptimal utilization of visible light, graphite-like carbon nitride (g-C 3 N 4 ) has constrained its widespread application in water treatment within photocatalytic systems. In addressing this issue, the present study employed acid etching and sonochemistry to fabricate a Ti 3 C 2 -SO 3 H/g-C 3 N 4 (TiCSOHCN) composite photocatalyst for the removal of tetracycline hydrochloride (TC). The amalgamation of Ti 3 C 2 -SO 3 H (TiCSOH) with g-C 3 N 4 engendered the establishment of a discernible Schottky barrier, facilitating an expedited electron transfer rate. Photocatalytic degradation experiments demonstrate that, compared to individual components, the TiCSOHCN composite photocatalyst exhibits significantly enhanced photocatalytic activity. The removal efficiency of TC reaches 75.42% within 2 h, and even after five cycles of experimentation, the degradation efficiency remains close to 70%, indicating excellent stability. The augmentation can be predominantly ascribed to the cooperative influence arising from the synergy between Ti 3 C 2 -SO 3 H and g-C 3 N 4 . The augmentation of visible light responsiveness in g-C 3 N 4 , achieved through its modification with TiCSOH, resulted in the mitigation of photoelectron-hole pair recombination, consequently leading to an amelioration in the photocatalytic efficacy of the TiCSOHCN composite catalyst. Intermediate species arising from the degradation of tetracycline were discerned utilizing LC-MS, and conjectures regarding plausible degradation pathways were postulated. Evaluations of the ecotoxicological impact of tetracycline and its intermediates indicated a progressive diminution in toxicity throughout the course of the photocatalytic degradation process. Furthermore, through free radical capture and EPR tests, it was confirmed that ·O 2 – and ·OH are the primary active species responsible for the photocatalytic degradation of TC, substantiating the proposed rational photocatalytic degradation mechanism. This research provides an innovative approach to developing high-performance and stable photocatalysts.
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ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Shiyao Yan,Shiping Shao,Yunxiang Tang,Xin Zhang,Chan Guo,Luxue Wang,Jiurong Liu,Lili Wu,Fenglong Wang
Aerogel-based composites, renowned for their three-dimensional (3D) network architecture, are gaining increasing attention as lightweight electromagnetic (EM) wave absorbers. However, attaining high reflection loss, broad effective absorption bandwidth (EAB), and ultrathin thickness concurrently presents a formidable challenge, owing to the stringent demands for precise structural regulation and incorporation of magnetic/dielectric multicomponents with synergistic loss mechanisms within the 3D networks. In this study, we successfully synthesized a 3D hierarchical porous Fe3O4/MoS2/rGO/Ti3C2Tx MXene (FMGM) composite aerogel via directional freezing and subsequent heat treatment processes. Owing to their ingenious structure and multicomponent design, the FMGM aerogels, featured with abundant heterogeneous interface structure and magnetic/dielectric synergism, show exceptional impedance matching characteristics and diverse EM wave absorption mechanisms. After optimization, the prepared ultralight (6.4 mg cm–3) FMGM-2 aerogel exhibits outstanding EM wave absorption performance, achieving a minimal reflection loss of −66.92 dB at a thickness of 3.61 mm and an EAB of 6.08 GHz corresponding to the thickness of 2.3 mm, outperforming most of the previously reported aerogel-based absorbing materials. This research presents an effective strategy for fabricating lightweight, ultrathin, highly efficient, and broad band EM wave absorption materials.
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