JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Xin Li,Jiale Liu,Guocan Jiang,Xinyu Lin,Jin Wang,Zhengquan Li
Aerogels, especially MXene aerogels, are an ideal multifunctional platform for developing efficient photocatalysts for CO 2 reduction because they are featured by abundant catalytic sites, high electrical conductivity, high gas absorption ability and self-supported structure. However, the pristine MXene aerogel has almost no ability to utilize light, which requires additional photosensitizers to assist it in achieving efficient light harvesting. Herein, we immobilized colloidal CsPbBr 3 nanocrystals (NCs) onto the self-supported Ti 3 C 2 T x (where T x represents surface terminations such as fluorine, oxygen, and hydroxyl groups) MXene aerogels for photocatalytic CO 2 reduction. The resultant CsPbBr 3 /Ti 3 C 2 T x MXene aerogels exhibit a remarkable photocatalytic activity toward CO 2 reduction with total electron consumption rate of 112.6 μmol g -1 h - 1 , which is 6.6-fold higher than that of the pristine CsPbBr 3 NC powders. The improvement of the photocatalytic performance is presumably attributed to the strong light absorption, effective charge separation and CO 2 adsorption in the CsPbBr 3 /Ti 3 C 2 T x MXene aerogels. This work presents an effective perovskite-based photocatalyst in aerogel form and opens a new avenue for their solar-to-fuel conversions.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
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IF 8.4
Guinan Chen,Jiahao Li,Nanjun Li,Chenglong Guo,Peng Jin,Liangjun Chen,Yongwu Peng
Thermal bimorph actuators have important applications in artificial muscles, switches, and microsensors for robotics and biomimetic devices. To broaden the adaptability of environments, it is essential to fabricate thermal actuators with multiple stimulus responses, including electricity, near-infrared (NIR) light, and ultraviolet (UV) light, with fast and large deformations . Herein, a thermal actuator with programmable stimuli response was designed by combining silver nanowires (AgNWs) with Ti 3 C 2 T x MXene . Due to the synergistic effect of AgNWs with high plasmonic properties and electrical conductivity as well as Ti 3 C 2 T x MXene with good flexibility and photothermal properties, the obtained actuator can roll up for 2200° at a low driving voltage (2 V) and shows a fast response speed of 0.4 s for a bending angle of 360° under NIR light. More remarkably, the obtained thermal actuator can curl 360° in 1.2s under UV light which has never been reported before. We believe that such thermal actuators are attractive for a wide range of innovative technologies involving soft-bodied robots, intelligent grippers, bionic worms, and information cryptography.
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ACS Applied Materials & Interfaces
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2018
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IF 8.097
Ruiting Liu,Miao Miao,Yahui Li,Jianfeng Zhang,Shaomei Cao,Xin Feng
Lightweight, ultrathin, and flexible electromagnetic interference (EMI) shielding materials with high electromagnetic shielding effectiveness (SE) and excellent mechanical robustness are greatly desired for miniaturized and highly integrated electronics. Herein, for the first time, a freestanding, ultrathin, and flexible Ti3C2Tx/poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate) (PEDOT:PSS) composite film with a “brick-and-mortar” structure is biomimetically designed and fabricated via a vacuum-assisted filtration process. The ultrathin polymeric composite film with a weight ratio 7:1 of Ti3C2Tx to PEDOT:PSS is only 11.1 μm in thickness but exhibits a high EMI SE value of 42.10 dB. Meanwhile, the tensile strength increases considerably from 5.62 to 13.71 MPa and the corresponding ruptured strain increases from 0.18 to 0.29% compared with pure Ti3C2Tx MXene film, respectively. Moreover, the hybrid film displays a superior conductivity of 340.5 S/cm and an outstanding specific EMI shielding efficiency of 19 497.8 dB cm2 g–1. The superior electrical conductivity and specific EMI shielding efficiency imply the excellent potential of the Ti3C2Tx/PEDOT:PSS composite films for ultrathin, lightweight, and flexible EMI shielding materials.
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ACS Nano
·
2025
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IF 16
Zhiyi Wu,Jiahui Shen,Zimu Li,Shuang Liu,Yuxuan Zhou,Kai Feng,Binbin Zhang,Shiqi Zhao,Di Xue,Jiari He,Kewei Yu,Jinpan Zhang,Graham Dawson,Qingfeng Zhang,Lizhen Huang,Chaoran Li,Xingda An,Lifeng Chi,Xiaohong Zhang,Le He
The ever-growing interest in MXenes has been driven by their distinct electrical, thermal, mechanical, and optical properties. In this context, further revealing their physicochemical attributes remains the key frontier of MXene materials. Herein, we report the anisotropic localized surface plasmon resonance (LSPR) features in Ti3C2Tx MXene as well as site-selective photocatalysis enabled by the photophysical anisotropy. Both experimental and theoretical studies provide direct evidence of the occurrence of transverse and longitudinal dipolar plasmon resonance modes, respectively, driven by in-plane and out-of-plane vibrations of the two-dimensional (2D) MXene nanoflakes. Wavelength-controlled excitation of the two LSPR modes is demonstrated to activate either the on-edge or the in-plane active sites for plasmonic charge carrier-induced site-selective catalysis. Our findings uncover the presence as well as the mechanism of the anisotropic plasmon resonance in nonmetallic 2D nanomaterials and provide intriguing design principles for next-generation plasmonic nanocatalysts.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Junzhi Li,Yanan Li,Haiyu Luo,Lili Tang,Nan Xu,Wenlan Ji,Shihao Zhang,Pei Nian,Yibin Wei
Construction of well-confined sub-nanochannels for molecular-sieving in organic solvent environment remains a challenge for organic solvent nanofiltration (OSN) membranes in precise fluid separation. Herein, cyclodextrin (CD) cross-linked 2D Ti 3 C 2 T x MXene membranes with laminar nanostructure containing unique sub-nanoscale mass transfer channels for unprecedented OSN performance is reported. Density-functional theory (DFT) calculation and experimental results confirm that CD monomers (α-, β-, γ-) with 3D intrinsic cavity structures are anchored with Ti 3 C 2 T x MXene nanosheets forming a stable polyester cross-linking network via an interfacial molecular engineering using trimesoyl chloride (TMC). The prepared membranes exhibit ultrahigh OSN performance with excellent stability in organic solvents. The optimal membrane can effectively reject dyes such as methylene blue (99.8%), rhodamine B (98.0%), and Congo Red (100%), while having high ethanol permeability ranging from 22.58 to 85.31 L/(m 2 h bar). Remarkably, the membrane structure remained intact after 4 weeks immersion in ethanol and acetone. This work provides a facile and reliable strategy to construct a high-performance 2D material-based OSN membrane with well-confined mass transfer channels.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
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IF 8.4
Haiyu Luo,Junzhi Li,Lili Tang,Yanan Li,Nan Xu,Wenlan Ji,Pei Nian,Shihao Zhang,Yibin Wei
Photocatalytic technology with high oxidative activity has been considered promising for eliminating fouling of nanofiltration (NF) membranes when used in organic pollutant removal. Herein, we report a photocatalytic self-cleaning NF membrane composed by two dimensional Ti 3 C 2 T x MXene and NaTaO 3 nanoparticles with excellent permeability and antibiotics removal efficiency. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) were used to verify the successful preparation of the photocatalytic self-cleaning membrane. The membrane with the NaTaO 3 nanoparticles loading of 8 mg (NM-8) exhibited excellent rejection (>99.67%) and water permeability (90.79–112.50 L m −2 h −1 ·bar −1 ) for tetracycline hydrochloride (TC), ciprofloxacin (CIP), methylene blue (MB), and 2-mercaptobenzothiazole (MBT). The removal efficiencies of the membrane for TC, CIP, MB, and MBT during the photocatalytic degradation process were 75.18%, 70.13%, 90.04% and 93.12%, respectively. Moreover, the chemical and optical properties were investigated by zeta potential, water contact angle, and UV–vis spectrum. The mechanism of photodegradation of pollutants by the prepared NaTaO 3 @Ti 3 C 2 T x MXene membranes was further elucidated. This work not only deepens the construction of photocatalytic NF membranes using two dimensional materials, but also provides a new strategy for the efficient removal of antibiotics from wastewater.
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LANGMUIR
·
2025
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IF 3.9
Longhui Dai,Huimin Yu,Yunkai Wang,Xuyang Zhang,Fang Xu,Xiaofang Pan,Jing-Ting Luo,Aihua Zhong
MXenes have attracted tremendous attention in electromagnetic interference shielding, energy storage, and gas and humidity detections because of their ultralarge surface area and abundant functional groups. However, their poor stability against hydration and oxidation makes them challenging for long-term storage and applications. Herein, we proposed and demonstrated a Ti3C2Tx MXene composite-based humidity sensor, of which the stability is pronouncedly enhanced by introducing an O2 adsorption competitor of extracted bentonite (EB). All the results of TEM, XPS, and Raman spectroscopy show that the oxidation of the Ti3C2Tx MXene is significantly suppressed by the introduction of EB. Its excellent performance in humidity detection further confirms the effectiveness of EB in improving the stability. An ultrahigh response value of 6400% and an ultrafast response time of 1 s at 85% RH are observed, suggesting promising prospects for superior humidity detection of the Ti3C2Tx MXene composite. Furthermore, its feasibility for flexible humidity detection was also examined on a PET substrate, which exhibited high flexibility and excellent discrimination in speaking words.
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INORGANIC CHEMISTRY
·
2023
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IF 4.6
Jin-Feng Jia,Tong Tong Hao,Pei-Hsuan Chen,Feng-Yi Wu,Wei Zhu,Sung-Fu Hung,Nian-Tzu Suen
Herein, we propose a simple yet effective method to deposit metal nanoparticles on Ti3C2Tx-MXene via direct electrosynthesis. Without using any reducing reagent or annealing under reducing atmosphere, it allows the conversion of metal salts (e.g., PtCl4, RuCl3·yH2O, IrCl3·zH2O, AgNO3, and CuCl2·2H2O) to metal nanoparticles with a small particle size (ca. 2 nm). Under these circumstances, it was realized that the support effect from Ti3C2Tx-MXene (electron pushing) is quite profound, in which the Ti3C2Tx-MXene support will act as an electron donor to push the electron to Pt nanoparticles and increase the electron density of Pt nanoparticles. It populates the antibonding state of Pt–Pt bonds as well as the adsorbate level that leads to a “weakening” of the ΔGH* in the optimal position. This rationalizes the outstanding activity of Pt/Ti3C2Tx-MXene (5 wt %, η10 = 16 mV) for the hydrogen evolution reaction (HER). In addition, this direct electrosynthesis method grants the growth of two or multiple types of metal nanoparticles on the Ti3C2Tx-MXene substrate that can perform dual or multiple functions as desired. For instance, one can prepare an electrocatalyst with Pt (2.5 wt %) and Ru nanoparticles (2.5 wt %) on the Ti3C2Tx-MXene support from the same synthetic method. This electrocatalyst (Pt_Ru/Ti3C2Tx-MXene) can display good electrocatalytic HER performance in both acid (0.5 M H2SO4) and alkaline electrolytes (1.0 M KOH).
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JOURNAL OF MEMBRANE SCIENCE
·
2019
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IF 7.015
Xue Gao,Zhong-Kun Li,Jian Xue,Yong Qian,Li-Zhi Zhang,Jürgen Caro,Haihui Wang
Highly effective air filters are needed because of the increasing harm caused by air particulate matter pollution. Herein, two-dimensional titanium carbide Ti 3 C 2 T x MXene nanosheets with active surface-terminating groups (O, OH and F) were used to modify the polyacrylonitrile (PAN) nanofiber filters to strengthen their interaction force with PM2.5 . These forces were measured quantitatively through the force-distance curve-based AFM showing that the MXene modification of the PAN fiber induces three times larger interaction forces than before. The obtained filters show high PM2.5 removal efficiency of ∼99.7% with a low pressure drop of ∼42 Pa. Moreover, the presence of MXene nanosheets strongly inhibits the propagation of bacteria (e.g. E. coli and S. aureus ) in the filters. Such filters can significantly improve air quality, especially in public places such as hospitals.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Weisong Zhao,Hong Chi,Xue Zhang,Yaoguang Wang,Tianduo Li
The emerging two-dimensional material MXene is widely used in metal ions adsorption. However, among the various modification strategies of MXene , the study on the synergistically effect of linear natural polymer and nano-sized particles and their interaction mechanism remains unclear. In this work, polyhedral oligomeric silsesquioxane (POSS-OH) and hydroxypropyl cellulose (HPC) were grafted onto Ti 3 C 2 T x MXene , producing chemically stable HPC/Ti 3 C 2 T x /POSS-OH (CHMP) with adjustable interlayer space. Under the synergistic interaction, the CHMP exhibited obviously increased kinetics, high selectivity and good repeatability towards the adsorption of uranium ions (UO 2 2+ ). The adsorption capacity of CHMP has been increased by 35.08%. In addition, X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscope (HR-TEM) indicated high chemical stability of CHMP. Langmuir isotherm model suggested that the adsorption mechanism of CHMP on UO 2 2+ was the single-layer adsorption coordinated with oxygen-containing functional groups. The maximum adsorption capacity of CHMP was 307.67 mg g −1 . Furthermore, XPS and simulation results suggested that the adsorption mechanism of UO 2 2+ was both strong coordination binding with hydroxyl groups and electrostatic interaction .
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ENERGY & FUELS
·
2022
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IF 4.654
Yuman Zhang,Xiaolin Zhu,Suya Sun,Qirui Guo,Meigui Xu,Guan Wu
The advanced design of heterostructured fibers with ordered transport channels and porous frameworks for high-speed ions/electrons kinetics is principally fundamental for high-performance fiber-based supercapacitors (FSCs). However, typically low energy-storage performances restrict their substantive applications due to a fibrous restacking phenomenon and poor interfacial charge transfer. Here, we develop an ordered core–shell fiber, wherein the porous zeolitic imidazolate framework-67 (ZIF-67) polyhedron shell is uniformly loaded on a highly conductive Ti3C2Tx core via a versatile microfluidic method. Due to the improved porous generation, ordered porous pathways, large exposed surface, and in situ interfacial electron transfer, the ZIF-67@Ti3C2Tx fiber displays excellent volumetric capacitance (972 F cm–3) and long-term cycling stability (90.8% capacitive retention after 20 000 cycles) in 1 M KOH electrolytes. Meanwhile, the flexible solid-state ZIF-67@Ti3C2Tx FSCs maintain a good capacitance, large bending/wearable stabilities, and steady temperature-dependent capability. Based on those significant electrochemical performances, the supercapacitors can impressively power various electrical devices [e.g., light-emitting diodes (LEDs), displays, electric fans, pinwheels, and rolling bells], which will guide the practical progress of miniaturized energy technologies and smart electronics.
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Journal of Energy Storage
·
2026
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IF 9.8
Hui Li,Jinyi Liu,Jiaming Liu,Wenke Lu,Lan Yang,Zihui Feng,Yue Liu
The increasing demand for fast, efficient, and durable energy storage systems highlights the need for electrode materials that can simultaneously deliver high energy and power densities. Here, we report a NiMo 3 S 4 /Ti 3 C 2 T x MXene composite synthesized through a two-step hydrothermal strategy, which couples the high pseudocapacitance of NiMo 3 S 4 with the excellent electrical conductivity and layered structure of Ti 3 C 2 T x MXene. The composite delivers a remarkable specific capacitance of 1443.6 F·g −1 , more than twice that of pristine NiMo 3 S 4 , benefiting from accelerated charge-transfer kinetics and the exposure of abundant electroactive sites. When assembled into an asymmetric supercapacitor, the device operates stably within a 1.5 V window and retains 82.84 % of its capacitance after 10,000 cycles. Furthermore, it achieves a notable high energy density of 46.85 Wh·kg −1 at a power density of 786.16 W·kg −1 . Density functional theory calculations reveal an increased density of electronic states near the Fermi level and a lowered K + diffusion energy barrier, corroborating the improved electrochemical kinetics. This work demonstrates a synergistic hybrid design that narrows the performance gap between batteries and supercapacitors, offering a promising pathway toward high-energy, high-power energy storage technologies.
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