APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yingnan Yang,Haifeng Yang,Pengfei Tang,Xiaodong Li,Weimiao Wang,Guangcheng Yang
Laser induced high temperature pulse (HTP) generation has been widely used in some high-immediacy applications requiring dramatic temperature changes. Recent years researchers put interest in light-to-heat (include photothermal, light induced exothermic reaction and combination of both) materials to reduce the initiating energy of the laser ignition. However, the laser energy for realizing sufficient light-to-heat conversion is still high. MXene exhibits excellent light absorption, high light-to-heat conversion efficiency and has abundant metastable atoms which trend to undergo exothermic chemical reactions, but its incomplete oxidation affects its total heat release when the laser power is relatively high. Herein, we have prepared a ZIF-67/Ti 3 C 2 MXene intercalated membrane. It is found that porous ZIF-67 exhibits a synergistic effect on MXene and can significantly improve its physical/chemical coupled HTP by enhancing its light absorption and subsequent energy release during its oxidation. ε 2,4,6,8,10,12-(hexanitrohexaaza) cyclododecane (ε-CL-20) laser ignition experiments prove that ZIF-67/Ti 3 C 2 MXene intercalated membrane exhibits better ignition performance than pure MXene membrane by reducing both ignition threshold (151.2 mJ) and ignition delay (21 ms) at a low laser power intensity (59.7 W/cm 2 ). This work can provide an insight for the structural design of new light-to-heat membranes.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Chao Liu,Wen Xiao,Guiyun Yu,Qiang Wang,Jiawei Hu,Chenghao Xu,Xinyi Du,Jianguang Xu,Qinfang Zhang,Zhigang Zou
Developing efficient heterojunction photocatalysts that have a high charge carrier separation rate and improved light-harvesting capacity is a crucial step in solving energy crisis and reducing environmental pollution. Herein, we synthesized few-layered Ti 3 C 2 MXene sheets (MXs) by a manual shaking process, and combined with CdIn 2 S 4 (CIS) to construct novel Ti 3 C 2 MXene/CdIn 2 S 4 (MXCIS) Schottky heterojunction through a solvothermal method. The strong interface between two-dimensional (2D) Ti 3 C 2 MXene and 2D CIS nanoplates led to enhanced light-harvesting capacity and promoted charge separation rate. Additionally, the presence of S vacancies on the MXCIS surface helped to trap free electrons. The optimal sample, 5-MXCIS (with 5 wt% MXs loading), exhibited outstanding performance for photocatalytic hydrogen (H 2 ) evolution and Cr(VI) reduction under visible light due to the synergistic effect of enhanced light-harvesting capacity and charge separation rate. The charge transfer kinetics was thoroughly studied using multiple techniques. The reactive species of • O 2 − , • OH and h + were generated in 5-MXCIS system, and e − and • O 2 − radicals were found to be the main contributors to Cr(VI) photoreduction. Based on the characterization results, a possible photocatalytic mechanism for H 2 evolution and Cr(VI) reduction was proposed. On the whole, this work provides new insights into the design of 2D/2D MXene-based Schottky heterojunction photocatalysts for boosting photocatalytic efficiency.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2023
·
IF 4.1
Binbin Chen,Weiwei Lu,Peng Xu,Kaisheng Yao
The photocatalytic degradation of pollutants is an effective and sustainable way to solve environmental problems, and the key is to develop an efficient, low-cost, and stable photocatalyst. Polymeric potassium poly(heptazine imide) (K-PHI), as a new member of the carbon nitride family, is a promising candidate but is characterized by a high charge recombination rate. To solve this problem, K-PHI was in-situ composited with MXene Ti3C2-derived TiO2 to construct a type-II heterojunction. The morphology and structure of composite K-PHI/TiO2 photocatalysts were characterized via different technologies, including TEM, XRD, FT-IR, XPS, and UV–vis reflectance spectra. Robust heterostructures and tight interactions between the two components of the composite were verified. Furthermore, the K-PHI/TiO2 photocatalyst showed excellent activity for Rhodamine 6G removal under visible light illumination. When the weight percent of K-PHI in the original mixture of K-PHI and Ti3C2 was set to 10%, the prepared K-PHI/TiO2 composite photocatalyst shows the highest photocatalytic degradation efficiency as high as 96.3%. The electron paramagnetic resonance characterization indicated that the·OH radical is the active species accounting for the degradation of Rhodamine 6G.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Jiyou Shen,Jun Shen,Wenjing Zhang,Xiaohui Yu,Hua Tang,Mingyi Zhang,Zulfiqar,Qinqin Liu
Ti 3 C 2 -MXene, which exhibits excellent electronic conductivity and optical properties , has been identified as a promising noble-metal-free co-catalyst for the development of efficient photocatalysts for environmental remediation. Herein, CeO 2 /Ti 3 C 2 -MXene hybrids were prepared by the in-situ growth of cube-like CeO 2 using ultrathin Ti 3 C 2 -MXene nanosheets as a two-dimensional platform via a simple hydrothermal route. Upon exposure to solar light, the CeO 2 /Ti 3 C 2 -MXene hybrid with the optimal ratio of Ti 3 C 2 -MXene exhibited enhanced performance in photocatalytic tetracycline degradation and CO 2 reduction, with activities 6.3 and 1.5 times greater than those of pristine CeO 2 , respectively. The improved activity of CeO 2 /Ti 3 C 2 -MXene was attributed to the Schottky junction induced by the built-in electric field between CeO 2 and Ti 3 C 2 -MXene, which drives the photogenerated electrons from CeO 2 to Ti 3 C 2 -MXene and expedites the segregation of the electrons and holes. This work may shed light on the careful design of novel Schottky junctions utilizing noble-metal free Ti 3 C 2 -MXene as co-catalysts for building efficient photocatalytic systems enacted in pollutant degradation and energy conversion.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Lan Ding,Jing Xu,Zeyu Zhang,Kezhen Qi,Ge Jin
Electrocatalytic hydrogen evolution reaction (HER) via water splitting is a prospective technology for achieving the sustainable production of hydrogen. So, ruthenium-based electrocatalysts have been extensively studied. However, metallic ruthenium tends to agglomerate due to the high cohesive energy, resulting in decreased HER performance in practical usage. Introducing sufficient support for dispersing and immobilizing ruthenium-based species is a viable way to enhance the utilization efficiency. MXene-based materials with unique surface termination groups, superior chemical stability, high specific surface area and favorable electrical conductivity have received significant attention as low-cost carriers for the development of active catalysts in HER. Herein, nitrogen (N) and sulfur (S) atom-doped titanium carbide (Ti 3 C 2 ) quantum dots (QDs) were successfully synthesized as efficient carriers for anchoring ultra-small ruthenium nanoparticles (NPs) toward electrocatalytic HER. Electrochemical tests reveal that the resultant N,S-Ti 3 C 2 QDs/Ru displays superior HER performance with low overpotentials of 28, 25 and 56 mV at 10 mA cm −2 current density in 0.5 M H 2 SO 4 , 1 M KOH and 1 M PBS solutions, respectively. Such a low overpotential is comparable to most previously reported non-metallic catalysts, Ru-based electrocatalysts and commercial Pt/C. In addition, N,S-Ti 3 C 2 QDs/Ru displays extraordinarily long-term stability over a relatively wide pH range and is indeed a kind of pH-universal catalyst for hydrogen evolution. Furthermore, density functional theory (DFT) calculations demonstrate that the interactions between metal Ru and N,S-Ti 3 C 2 MXene QDs effectively regulate the electronic structure of the active site Ru, lowering the energy barrier of the electrocatalytic HER intermediate, thus dramatically enhancing the activity for N,S-Ti 3 C 2 QDs/Ru. This work proposes a novel approach to functionalize MXene quantum dots for use as low-cost electrocatalysts with promising practical applications in renewable energy conversion.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED COMPOSITE MATERIALS
·
2024
·
IF 1.8
Shuai Qi,Sai Gong,Chang Liu,Shenzhen Li,Bo Li,Shiwei Xie,Xiao Zhang
Intrinsic self-healing waterborne polyurethane (WPU) is an environmentally friendly, economically viable, and practical novel intelligent material. However, the key to achieving practical applications lies in the remote activation of repair in self-healing materials and the excellent mechanical properties of the matrix. In this study, we introduce quadruple hydrogen bonding in the polyurethane backbone. We have incorporated a novel two-dimensional sheet-like material, MXene, to achieve visible light remote-driven self-healing of material hydrogen bonds while enhancing the material’s mechanical properties. By utilizing the MXene supernatant, this approach not only resolves the issues of poor stability and easy sedimentation of MXene nanosheets in water-based polymers but also helps to prevent resource wastage. Our research results demonstrate that the composite film exhibits a tensile strength of 6.55 MPa and a fracture elongation of 604%. Additionally, quadruple hydrogen bonds in the WPU chains enable rapid self-healing of microcracks under visible light irradiation at 300 mW/cm2, with complete disappearance within 80 min.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 14
·11271-11282
·
IF 4.6
Fang Li,Shuyue Xiong,Yijun Tan,Mingming Luo,Zijian Wu
Antibiotics play an excellent role in preventing and treating animal diseases, but their improper use poses a potential threat to public health. Designing a sensing platform to detect trace amounts of antibiotic residues in actual samples is a significant challenge. To achieve this objective, a self-assembly aptasensor based on a two-round signal amplification strategy for kanamycin (KANA) trace detection was demonstrated by employing carbon dot (CD) decorated Ti3C2 MXene as electrode modification material and the complex of double-stranded DNA (dsDNA) and methylene blue (MB) as probes, where dsDNA was composed of complementary DNA (cDNA) and aptamers. The CDs can effectively suppress the self-stacking of Ti3C2 MXene to promote electron transfer and provide plenty of exposed active sites for the aptamer to capture KANA precisely. The MB inserted into dsDNA would be liberated upon interaction with KANA due to a competitive process that occurs among cDNA and KANA, reducing electrical signal. Under the optimal conditions, the constructed aptasensor exhibited a good linear relationship between the output signal and the logarithm of KANA concentration in the range of 1 fM–1 mM, and the limit of detection is 0.892 fM. The satisfactory selectivity, stability, and reproducibility suggested that the prepared aptasensor can be a universal platform to detect other antibiotic residues by anchoring corresponding aptamers. Furthermore, it has been successfully applied to determine KANA in milk samples (recovery rates ranged from 101.01% to 107.21%, and the RSD was below 5%), demonstrating potential application prospects in the food-safety analysis field.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yan Li,Han Zhang,Guo Qu,Lingying Xie,Sisi Tang,Hang Lei,Yuxia Zhong,Yue-Fei Zhang
A novel chitosan-based composite hydrogel (CS/PEI-MXene) made of polyethyleneimine and Ti 3 C 2 MXene as modifiers and acrolein as crosslinker has been synthesized simply and conveniently, which could be applied in the removal of residual antibiotic pharmaceuticals (chlortetracycline (CTC), ibuprofen (IBU), etc.) from aqueous environments. The CS/PEI-MXene was used as an adsorbent for chlortetracycline and ibuprofen. The removal rates of CTC and IBU could be achieved to 91.1 % and 99.25 %, respectively. In addition, the reusability of CS/PEI-MXene for CTC and IBU appeared good capacity, and the removal rate was maintained at approximately 70 % after five cycles. FT-IR, XPS, and zeta potential were used to show that the hydrogel was successfully synthesized, and its physicochemical characteristics were studied. Systematically examined were conducted on the effects of pH (3−10), contact time (0–120 min), and temperature (30–40 °C) on the adsorption efficiency of CS/PEI-MXene. The adsorption mechanism of CS/PEI-MXene on CTC and IBU mainly included electrostatic interactions and hydrogen bonding. Overall, the development of MXene based hydrogel adsorbent will provide a practical approach to the treatment of wastewater containing antibiotic pharmaceuticals and have great potential for practical applications.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yuxuan Zhang,Junzhe Zhang,Hongming Zhao,Danfeng Zhang,Mei Wang,Peng Li,Liyong Wang,Yan-Bing He,Huiqi Wang
Quantum dots have been extensively utilized in diverse components of lithium-ion batteries (LIBs) due to their distinctive electronic structures, extremely high specific surface area, and remarkable interfacial regulation ability. In this work, a facile liquid-phase exfoliation method was employed to break down bulk boron into quantum-sized dots using a probe high-power ultrasonic crusher. The obtained boron quantum dots (BQDs) were confined within highly dispersed Ti 3 C 2 MXene, thereby forming BQDs/Ti 3 C 2 stacked composite anode materials for lithium-ion batteries. Based on the quantum confinement effect, BQDs exhibit superior electrochemical activity compared to bulk boron, providing abundant active sites for ion insertion and extraction. The well-dispersed BQDs in the Ti 3 C 2 MXene form a continuous network, facilitating efficient charge and ion diffusion and transport throughout the entire structure. Electron deficiency induced by BQDs occurs in the interlayers of Ti 3 C 2 MXene, thus the local electronic defect is introduced into the originally perfect periodic atomic arrangement and electronic potential field. This would cause ripples in the entire electronic system, leading to a redistribution of electrons. This not only enhances the charge transfer kinetics but also modulates the lithium-ion diffusion pathways through local electric field intensification. The as-prepared BQDs/Ti 3 C 2 stacked composite thus delivers an extremely high initial discharge capacity of 2514.5 mAh g −1 at 0.05 A g −1 , a large reversible capacity of 835.3 mAh g −1 at 0.1 A g −1 , and outstanding long-term cycle stability, with 958.0 mAh g −1 retained after 300 cycles. Notably, it also demonstrates exceptional long-term cycling performance at 2.0 A g −1 , with the capacity increasing from 459.5 mAh g −1 after 163 cycles to 1251.7 mAh g −1 after 759 cycles. The exploration of BQDs embedded in Ti 3 C 2 MXene is anticipated to inspire in-depth investigations into advanced BQD-powered MXene anode materials for LIBs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaoxin Lv,Zixiao Deng,Menglian Wang,Jiujun Deng
Transition-metal carbides, carbonitrides , and nitrides (MXene) as an emerging two-dimensional semiconductor has open an ideal pathway for fabricating various TiO 2 -based functional materials . In this work, we demonstrate a simple and one-step heat treatment for the fabrication of Ti 3 C 2 MXene-derived carbon-doped TiO 2 /Fe 2 O 3 composite for superior lithium-ion batteries (LIBs). As an anode, the as-fabricated composite delivers an excellent lithium-ion storage of 538 mA h/g at a current density of 0.1 A/g and superior rate performance of 152.6 mA h/g at a higher current density of 5 A/g, which is 6 times higher than that of C-doped TiO 2 electrode. In addition, a remarkable cyclic stability with 88.46 % capacity retention is also obtained for the composite anode at a current density of 1 A/g after 1000 cycles. Based on various characterizations, the greatly enhanced electrochemical performance can be attributed to the synergistic effects of carbon doping, layered structures of TiO 2 , and the anchoring of Fe 2 O 3 nanoparticles , which effectively promote the charge transport kinetics. This study will broaden the Ti 3 C 2 MXene application in LIBs and meanwhile provide an alternative method for synthesizing more efficient anode materials .
✓ 已验证
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Wei Zheng,Zequn Yang,Jiefeng Chen,Weizhen He,Ruiyang Qin,Hongxiao Zu,Wenqi Qu,Jianping Yang,Lijian Leng,Hailong Li
A fundamental obstacle that restricts the use of metal selenides for gaseous elemental mercury (Hg 0 ) immobilization is the failure to take both the optimization of intrinsic structure favorable for Hg 0 diffusion and adequate exposure of metal selenide towards Hg 0 into consideration. In this work, a Ti 3 C 2 MXene/Cu 2 Se sorbent for Hg 0 sequestration was synthesized via a Lewis acid etching route combined with room-temperature selenization pathway. During this strategy, copper chloride plays a dual role, i.e., an etching agent for the Ti 3 C 2 MXene synthesis and a precursor for Cu 0 decoration. Cu 2 Se precursors (Cu 0 ) were dispersedly and firmly pre-anchored on the substrate, effectively avoiding the agglomeration and warranting excellent dispersion of Cu 2 Se. Compared with pristine Cu 2 Se, Ti 3 C 2 MXene/Cu 2 Se exhibits advantageous structural characteristics fully boosting Hg 0 diffusion kinetics. Meanwhile, the enhanced dispersion of Cu 2 Se from the prefixation of Cu 0 largely enhances the exposure and utilization of selenide. Consequently, Ti 3 C 2 MXene/Cu 2 Se shows a Hg 0 adsorption capacity of 147.64 mg g −1 , which is much higher than those of Cu 2 Se and most other metal selenides. Impressively, its uptake rate of 688.99 μg g −1 min −1 is the highest record rate in metal selenides. Moreover, Ti 3 C 2 MXene/Cu 2 Se still maintained outstanding Hg 0 adsorption performance under relatively high reaction temperature with the shelter of Ti 3 C 2 MXene. Typical fuel gas situations including coal combustion flue gas, smelting flue gas, natural gas have negligible influences on its Hg 0 adsorption performance, indicating its extensive applicability and flexibility for actual industrial situations. This work also provides valuable hints for the trade-off of structural properties and ligands exposure to design Hg 0 sorbents with satisfactory Hg 0 sequestration performances.
✓ 已验证
DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Wen Zhu,Li Ren,Chong Lu,Hao Xu,Fengzhan Sun,Zhewen Ma,Jianxin Zou
MXenes are considered as potential support materials for nanoconfinement of MgH2/Mg to improve the hydrogen storage properties. However, it has never been realized so far due to the stacking and oxidation problems caused by unexpected surface terminations (−OH, −O, etc.) on MXenes. In this study, hexadecyl trimethylammonium bromide was used to build a 3D Ti3C2Tx architecture of folded nanosheets to reduce the stacking risk of flakes, and a bottom-up self-assembly strategy was successfully applied to synthesize ultradispersed MgH2 nanoparticles anchored on the surface of the annealed 3D Ti3C2Tx (Ti-MX). The composite with a 60 wt % loading of MgH2 NPs, 60MgH2@Ti-MX, starts to decompose at 140 °C and is capable of releasing 3.0 wt % H2 at 150 °C within 2.5 h. In addition, a reversible capacity up to 4.0 wt % H2 was still maintained after 60 cycles at 200 °C without obvious loss in kinetics. In situ high-resolution TEM observations of the decomposition process together with other analyses revealed that the nanosize effect caused by the nanoconfinement and the multiphasic interfaces between MgH2(Mg) and Ti-MX, especially the in situ formed catalytic TiH2, were main reasons accounting for the superior hydrogen sorption performances.
研究领域:
材料科学
·
氢气储存
·
纳米技术
·
能量存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）