CARBON
·
2022
·
IF 11.307
Dangcheng Su,Yuanhua Xiao,Yingliang Liu,Shengang Xu,Shaoming Fang,Shaokui Cao,Xuezhao Wang
2D MXenes (transition metal carbides, Ti 3 C 2 T x ) with large surface area and metallic conductivity are widely used as supporters in catalysts. Unfortunately, the single MXene sheets would deteriorate in the presence of oxygen and water, which is almost the same as the environment of oxygen reduction reaction (ORR). Herein, an “armor” was constructed to encapsulate the oxidizable MXene by a confined in-situ oxidative polymerization strategy, employing the electrostatic interaction between the exfoliated MXene sheets (negatively charged) and oxidant (Fe 3+ , positively charged). The ultra-dispersed binary Fe 3 N and Co sits coupled with the large surface area MXene supporter synergy to endow more exposed active sites, meanwhile, the density functional theory (DFT) studies reveal that a moderate binding strength between the intermediates and the binary active sites was effectively modulated to enhance the ORR performance. The synthesized Fe 3 N/Co–N–C@MXene exhibits an impressive half-wave potential (E 1/2 , 0.871V) and a lower Tafel slope of 52.56 mV dec −1 than that of Pt–C-20% (74.89 mV dec −1 ). The Fe 3 N/Co–N–C@MXene based ZAB exhibits a four times higher peak power density (189.16 mW cm −2 ) than the Pt–C-20% based ZABs and superior cycle stability within 320 h. Furthermore, the assembled flexible ZABs shows high flexibility and stability in different bending scenarios.
研究领域:
材料科学
·
电化学
·
纳米催化
·
能源存储与转换
·
功能材料
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Chen Li,Dongting Ye,Jiangbo Tan
Recombination layer engineering is a key enabler in monolithic perovskite/silicon tandem solar cells, where charge extraction and optical management must be simultaneously optimized. In this study, we introduce a composite Ti 3 C 2 T x MXene/indium zinc oxide (IZO) interlayer as a tunable recombination layer to enhance both electrical and optical performance in two-terminal tandem architectures. The interlayers were fabricated by integrating few-layer Ti 3 C 2 T x MXene flakes into an IZO matrix, forming a conductive yet transparent network. Systematic tuning of MXene content revealed that the sample with 10 vol% (MX-10) offered a low resistivity (∼1.69 mΩ·cm), and high optical transmittance. EIS and TRPL analyses demonstrated improved charge recombination dynamics and enhanced carrier extraction. When implemented in monolithic tandems, the MX-10-based device achieved a PCE of 26.67%, outperforming the ITO-based control device (24.40%), with improved J SC and FF. Long-term stability testing over 1000 hours under continuous illumination revealed only 9.5% degradation in MX-10 devices, confirming the material's promise for practical applications. Our findings highlight the synergistic role of MXene and IZO in constructing an efficient, transparent, and stable interfacial layer for next-generation tandem photovoltaics.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wei Zheng,Zequn Yang,Jiefeng Chen,Mingguang Zhang,Hongxiao Zu,Ruiyang Qin,Wenqi Qu,Jianping Yang,Lijian Leng,Hailong Li
Utilization of monolithic mineral sulfide-based sorbent for the fix-bed elemental mercury (Hg 0 ) removal is regarded as a predominant predicament in the field of Hg 0 abatement. In this work, a general and facile route was exploited to establish CuS particles decorated 3D porous Ti 3 C 2 T x MXene aerogel via divalent Cu 2+ cations induced assembly combined with subsequent high-temperature sulfurization treatment, during which, uniform CuS particles were homogeneously anchored throughout the Ti 3 C 2 T x substrate. The obtained 3D CuS/Ti 3 C 2 T x MXene aerogel exhibited satisfactory textural property, hierarchical pore structure and strong interaction between Ti 3 C 2 T x MXene and CuS. Meanwhile, the inherent restacking of Ti 3 C 2 T x MXene nanosheet and serious agglomeration of CuS can also be effectively avoided in the formation of aerogel. Those structural advantages originating from this novel gelation process favorably contributes to satisfactory Hg 0 mass transfer and sufficient utilization of CuS active ligands, which largely strengthens Hg 0 removal performance and broadens the fix-bed application of mineral sulfides. Consequently, the Hg 0 capture capacity and adsorption rate of CuS/Ti 3 C 2 T x MXene aerogel reached 90596.4 g m −3 and 120.64 g m −3 min −1 , respectively, far outbalancing those of the reported in-situ selenized copper foam with excellent Hg 0 removal activity. The impressive Hg 0 sequestration performance is attributed to its relatively large specific surface area, layered pore channel, and highly dispersed CuS particles, largely boosting Hg 0 mass transfer and following sequestration. Moreover, other mineral sulfides/Ti 3 C 2 T x MXene aerogels can also be constructed by just replacing divalent metal cations, which makes the initial effort towards the fix-bed utilization of mineral sulfides-based aerogel for vapor-phase Hg 0 immobilization.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zizhen Yu,Li Jiang,Rongyang Liu,Weidan Zhao,Ziheng Yang,Jinyao Zhang,Shangzhong Jin
The emergence of antibiotic-resistant bacterial strains has caused bacterial infections to become a more serious worldwide health problem. The development of multi-functional platform that can quickly and sensitively detect bacteria and effectively inhibit or kill bacterial is important and urgent. Herein, a novel versatile MXene-Au nanocomposite was successfully synthesized by self-assembly method for rapid detection of bacteria and photothermal sterilization. The typical gram-negative Escherichia coli (E. coli) and the gram-positive Bacillus subtilis (B. subtilis) were used as models to perform label-free, rapid and sensitive detection of bacteria based on SERS method. The antibacterial performance of the material was proved by the colony counting method, and the survival rates of E. coli and B. subtilis were as low as 8.05% and 0.06%, respectively. The Ti 3 C 2 T x -Au nanoparticles (NPs) irradiated with 808 nm light showed significant antibacterial effect within only 6 min, and the germicidal rates for E. coli and B. subtilis were 99.25% and 100%, respectively. The photothermal conversion efficiency reached as high as 43.40%. Accordingly, this multi-functional nanocomposite material can not only detect bacteria sensitively, but also has antibacterial and photothermal sterilization effects, which provides a greatly promising countermeasure for clinical treatment of diseases caused by multi-drug resistant bacteria.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
微生物学
✓ 已验证
DOI
高影响因子
ACS Sensors
·
2021
·
IF 7.711
Long Zhang,Shaohui Zhang,Chao Wang,Quan Zhou,Haifeng Zhang,Ge-Bo Pan
With the fast development of consumer electronic and artificial intelligence equipment, flexible pressure sensors (FPSs) have become a momentous component in the application of wearable electronic, electronic skin, and human–machine interfacing. The capacitive FPS possesses the merits of low energy consumption, high resolution, and fast dynamic response, so it is ideal for mobile and wearable electronics. However, capacitive FPS is vulnerable to electromagnetic interference and parasitic capacitance due to its low sensitivity. Microstructure or porous dielectric materials have been applied to improve the sensitivity of the capacitive FPS, but the high sensitivity is just limited to a narrow region. In this work, we propose a different strategy that incorporates a high-permittivity MXene nanocomposite dielectric with a 3D network electrode (3DNE) to improve the sensing performance of the capacitive FPS. Thanks to the high permittivity of the dielectric layer and hierarchical deformation of the electrode, the fabricated capacitive FPS exhibits a high sensitivity of 10.2 kPa–1 in the low pressure range (0–8.6 kPa) and still maintains a relatively high sensitivity of 3.65 kPa–1 with a near-linear response in a wide pressure range (8.6–100 kPa). In addition, the capacitive FPS can withstand over 20,000 times pressure loads without significant signal damping. Furthermore, the working mechanism of the capacitive FPS is illustrated by the finite element analysis (FEA) method and theoretical calculation. The application potential of the sensor in wearable electronics was demonstrated by human pulse wave monitoring and pressure mapping tests with a 4 × 6 sensor microarray.
研究领域:
材料科学
·
电子工程
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Jingbin Wei,Hongshuo Cao,Yanhong Tian,Xuejun Zhang
To address the inherently poor electronic and ionic conductivity of titanium-niobium oxide materials and to improve their suitability for use at high current densities , we designed and synthesized Ti 2 Nb 10 O 29 (TNO) microspheres with diameters of 1 to 3 μm by a simple solvothermal method . Then, MXene, a highly conductive two-dimensional material, was introduced and perfectly coated onto the microsphere surface by electrostatic forces and chemical bonding. The MXene nanosheets not only improve the overall conductivity but also protect the TNO microspheres and reduce the electrochemical polarization at high current densities. Thus, the composite anode electrode shows outstanding reversible specific capacity and stability at high currents and long cycles. Specifically, at 20 C, the initial reversible specific capacity of the TNO@MXene electrode was 200.3 mAh.g −1 with a coulomb efficiency of 94.4%. The reversible specific capacity remained at 131.2 mAh.g −1 even after 1400 cycles with an average capacity loss rate of only 0.02%. In addition, the outstanding pseudo-capacitance property of TNO@MXene ensures its fast charging and discharging capability and capacity at a high rate.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Dan-Dan Shao,Qingxiao Zhang,Long Wang,Zhen-Yuan Wang,Yi-Xuan Jing,Xue-Li Cao,Fang Zhang,Shi-Peng Sun
Highly permeable two-dimensional membranes are desirable for efficient molecular sieving and resource recovery through confined-space mass transfer via nanosheets restacking. However, their application requires addressing the swelling issue of 2D nanosheets in solvents, weak interfacial interaction between the adjacent nanosheets , and performance declination caused by over-restacking. This study reports an interfacial adhesion enhanced MXene membrane via pillaring carbon nanotubes (CNTs) combined with an upgraded post-treatment method consisting of fan-drying and air-drying. The combined drying method induces the nanosheets stacking to a partial-dehydration membrane structure, granting the neat MXene membrane with stable anti-swelling property. The strong π-π interactions and van der Waals forces of CNTs impel the close-fitting of MXene nanosheets for enhanced anti-swelling property and interfacial bonding force. The CNTs with confined-space mass transfer effect and high mechanical strength elevate the pillared MXene/CNTs-CTAB membrane performance for 5 times (the pure water permeance was enhanced from 20.09 L·m -2 ·h -1 ·bar -1 to 100.89 L·m -2 ·h -1 ·bar -1 ), endowing the membrane with high anti-pressure property. The membrane with precise molecular sieving property exhibits great potential in resource recovery and energy-saving.
研究领域:
材料科学
·
纳米技术
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Jialin Pan,Meiling Zhang,Gege Fu,Li Zhang,Huimei Yu,Xu Yan,Fangmeng Liu,Peng Sun,Xiaoteng Jia,Xiaomin Liu,Geyu Lu
Although the advent of two-dimensional (2D) MXenes has substantially increased the family of 2D materials and diverse applications, the rational design of MXene-based composites and their specialized applications in theranostic biomedicine remain a challenge. In this work, we developed, for the first time, Ti3C2 MXene nanosheets for near-infrared (NIR)-IIb (1530 nm) and magnetic resonance (MR) imaging-guided photothermal therapy. Surface engineering and functionalization of 2D Ti3C2 MXene nanosheets with NaErF4:0.5%Tm@NaLuF4 (NaErF4) nanoparticles result in NaErF4@Ti3C2 composites that emit in the NIR-IIb region at 1530 nm under 808 nm excitation, conferring NIR-IIb imaging guidance and monitoring capabilities during tumor hyperthermia. Due to the inherent magnetic properties of the Er3+ ions, the NaErF4@Ti3C2 composite can also be used for efficient T2-weighted MR imaging. In particular, based on the high photothermal conversion capability (43.62% at 808 nm irradiation) and photothermal stability, the designed composites were further explored for efficient tumor ablation with an inhibition ratio of 92.9%, which was systematically demonstrated both in vitro and in vivo. No significant nanocomposite toxicity was observed at the injected dose. This work not only expands the performance of MXene-based multifunctional nanostructures but also highlights the promise of their versatile applications in cancer therapy.
研究领域:
材料科学
·
生物医学工程
·
纳米医学
·
癌症治疗
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2020
·
IF 7.635
Shuangjiang He,Yingqing Zhan,Jiaxin Hu,Guiyuan Zhang,Shumei Zhao,Qingying Feng,Wei Yang
Multi-component pollutant-oil-water emulsion from the fast-growing industry seriously threatens the human health and ecological environment, which poses a huge challenge to membrane technology. Recently, 2D MXene materials have shown promising and potential candidates for functional separation membranes . Herein, for the first time, a multitasking hierarchical MXene@UIO-66-(COOH) 2 composite membrane supported on nylon 66 microporous substrate was designed via a facial strategy, which possessed high chemical stability and efficient multi-component pollutant-oil-water emulsion separation performance. The promising synergistic separation performance of various oil-in-water emulsions and dye, high antifouling resistance, and excellent recyclability of MXene@UIO-66-(COOH) 2 composite membrane originated from the inherent hydrophilicity , low oil adhesion feature, and hierarchical intercalation structure of membrane. Furthermore, the chemically stable MXene@UIO-66-(COOH) 2 composite membrane exhibited outstanding corrosion resistance under strong acid (3 M HCl), alkali (1 M NaOH) and salty (Saturated NaCl) solutions. Therefore, this work provides a powerful platform for designing stable and functional 2D membrane materials for multi-component pollutant-oil-water emulsion separation in harsh chemical environments.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Small
·
2018
·Vol. 14
·期 41
·1802443
·
IF 9.598
Xiao-Tian Gao,Ying Xie,Xiao-Dong Zhu,Ke-Ning Sun,Xu-Ming Xie,Yi-Tao Liu,Jian-Yong Yu,Bin Ding
Being conductive and flexible, 2D transition metal nitrides and carbides (MXenes) can serve in Li–S batteries as sulfur hosts to increase the conductivity and alleviate the volume expansion. However, the surface functional groups, such as OH and F, weaken the ability of bare MXenes in the chemisorption of polysulfides. Besides, they create numerous hydrogen bonds which make MXenes liable to restack, resulting in substantial loss of active area and, thus, inaccessibility of ions and electrolyte. Herein, a facile, one-step strategy is developed for the growth of TiO 2 quantum dots (QDs) on ultrathin MXene (Ti 3 C 2 T x ) nanosheets by cetyltrimethylammonium bromide-assisted solvothermal synthesis. These QDs act as spacers to isolate the MXene nanosheets from restacking, and preserve their 2D geometry which guarantees larger electrode–electrolyte contact area and higher sulfur loading. The stronger adsorption energy of polysulfides with TiO 2 (than with Ti 3 C 2 T x ), as proven by density functional theory calculations, is essential for better on-site polysulfide retention. The ultrathin nature and protected conductivity ensure rapid ion and electron diffusion, and the excellent flexibility maintains high mechanical integrity. In result, the TiO 2 QDs@MXene/S cathode exhibits significantly improved long-term cyclability and rate capability, disclosing a new opportunity toward fast and stable Li–S batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Saidi Wang,Zhaoyi Wang,Yiyi Fan,Xiuxia Meng,Fukai Wang,Naitao Yang
The reverse electrodialysis (RED) is a potential technique to harvest osmotic energy caused by different salinities. Owing to the negative surface-charged controlling effects of nanofluidic channel in 2D membrane, the power density has been achieved with high energy conversion efficiency for cations (Na + with the counterpart of Cl − ). However, anion-selective nanofluidic channel is rare but still required for promising application of RED due to its high higher diffusion rate resulting in desirable osmotic power energy. In this work, we constructed a two-dimensional layered MXene membrane with positive charge via amination strategy of 3-aminopropyltriethoxysilane (APTES) toward anion selectivity for efficient osmotic power harvesting. The power density of the resultant membrane can achieve a maximum of 10.98 W m −2 at a natural salinity gradient, higher than the commercial benchmark of 5 W m −2 . Under regulating environmental conditions including operation temperatures, pH and the existence of pollutants (heavy metal ions and organic pollution) of the simulated electrolyte solution, a higher power density of 20.66 W m −2 can be reached through Cl − transmembrane transport. During 10-h testing, the attenuation of output power density was just 3%. The applicable stability still maintains under the contaminative environment of heavy metal ions or organic pollution. These results will bring an innovative design of anion-selective membrane for osmotic energy conversion and widen the practical application in ion selectivity.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Shuang Xiong,Tao He,Tao Zhou,Dalei Wang,Yueyue Wang,Chaoqing Dai,Wei Liu
Pesticides are often overused in production and life, which harms the environment and human health. However, the current tools for detecting pesticides are not effective enough due to lower flexibility and stability. With regards to this, we synthesized a flexible substrate of PDMS modified by MXene (Ti 3 C 2 Tx)/Ag. The MXene-noble metal composite substrate can detect 4-mercaptobenzoic acid (4MBA) at a low concentration of 1.0 × 10 −11 M. Furthermore, MXene can inhibit the oxidation of Ag nanoparticles (NPs) and efficiently localize the molecules to be tested within the hot spots. In particular, the flexibility of the substrate enables the detection of trace amounts of thiabendazole (TBZ) by collecting samples directly from uneven surfaces such as fruits and vegetables. The substrate is also capable of detecting a mixture of TBZ and 4MBA simultaneously. Using intrinsic Raman peak of PDMS as the internal standard can eliminate the influence of environmental factors on the detection results, which makes the detection results more quantitative. The resultant noble metal-semiconductor substrates show great potential applications in food safety and environmental monitoring fields.
研究领域:
材料科学
·
分析化学
·
环境科学
·
食品安全
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）