CHINESE JOURNAL OF CATALYSIS
·
2022
·
IF 12.92
Huapeng Li,Bin Sun,Tingting Gao,Huan Li,Yongqiang Ren,Guowei Zhou
ABSTRACT Photocatalytic degradation and hydrogen production using solar energy through semiconductor photocatalysts are deemed to be a powerful approach for solving environmental and energy crisis. However, the biggest challenge in photocatalysis is the efficient separation of photo-induced carriers. To this end, we report that the mesoporous TiO 2 nanoparticles are anchored on highly conductive Ti 3 C 2 MXene co-catalyst by electrostatic self-assembly strategy. The constructed mesoporous TiO 2 /Ti 3 C 2 composites display that the mesoporous TiO 2 nanoparticles are uniformly distributed on the surface of layer structured Ti 3 C 2 nanosheets . More importantly, the as-obtained mesoporous TiO 2 /Ti 3 C 2 composites reveal the significantly enhanced light absorption performance, photo-induced carriers separation and transfer ability, thus boosting the photocatalytic activity . The photocatalytic methyl orange degradation efficiency of mesoporous TiO 2 /Ti 3 C 2 composite with an optimized Ti 3 C 2 content (3 wt%) can reach 99.6% within 40 min. The capture experiments of active species confirm that the •O 2 − and •OH play major role in photocatalytic degradation process. Furthermore, the optimized mesoporous TiO 2 /Ti 3 C 2 composite also shows an excellent photocatalytic H 2 production rate of 218.85 μmol g –1 h –1 , resulting in a 5.6 times activity as compared with the pristine mesoporous TiO 2 nanoparticles . This study demonstrates that the MXene family materials can be applied as highly efficient noble-metal-free co-catalysts in the field of photocatalysis .
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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.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
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IF 22.1
Chao Wu,Weixin Huang,Huanmin Liu,Kangle Lv,Qin Li
Facing the increasingly serious issues of energy crisis and environmental pollution, it is vital to develop efficient and durable photocatalysis systems for hydrogen (H 2 ) production from water splitting. However, for the famous CdS-based systems, the bottleneck of poor efficiency and low stability arisen from photocorrosion has not been broken through yet. In this study, a ternary composite of CdS , MoS 2 and Ti 3 C 2 MXene with intimately contact interfaces was successfully constructed via an in situ growth method, which exhibited reinforced photocatalytic H 2 -production activity and increased photocorrosion resistant capability. Both of experimental characterizations and density functional theory (DFT) calculations well proved that the photogenerated holes and electrons of CdS timely migrated to Ti 3 C 2 and MoS 2 , respectively. As a consequence, the optimal sample displayed a high H 2 production rate of 14.88 mmol·h −1 ·g −1 with a lifetime of up to 78 h, and the component and structure of the composite were kept intact during the photocatalysis reaction. This work highlights the synergistic effect of the Ti 3 C 2 MXene and MoS 2 as redox dual cocatalysts on the promoted photocatalytic performance and durability of CdS, which can be anticipated to significantly enhance the commercial availability of CdS and even boost its incorporation into industrial applications.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wentao Wang,Xiang Li,Ruyi Wang,Jingjing Wang,Hongxia Deng,Shanshan Tong
The scarcity and economic importance of gold has motivated the researchers to develop novel and efficient adsorbents to the increase of recycling from secondary waste streams. In this work, the three-dimensional (3D) Ti 3 C 2 MXene-POSS/V 2 O 3 @C aerogel (MPVA) with orderly network structure was fabricated by the interfacial assembly of MXene and freezing-induced preassembly. The new MPVA hybrid exhibited ultrafast kinetics (only 10 min to reach equilibrium), selectivity, and excellent trapping capacity for Au (III) , owing to the reductive capture mechanism. The Langmuir model was used to describe the capture of Au (III) delivered by MPVA, achieving the maximum capture capacity of 1425.4 mg g −1 at 298 K. Moreover, MPVA displayed extremely high trapping efficiency (>99.9%) at 273 K, which suggests that this composite is promising for capturing Au (III) in cold temperatures. MPVA also shows good reusability after ten cycles. The results indicate that MPVA has great potential for efficient capturing from complex and cold aqueous solutions.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Lu Wu,Chang Xu,Mingshuai Fan,Ping Tang,Rui Zhang,Shuaitao Yang,Lujun Pan,Yuezhen Bin
Flexible sensors have wide-ranging application prospects in the field of human health motion monitoring. However, it is still a challenge to design and prepare strain sensors with both high sensitivity and wide operating range. Inspired by the fiber connection structure of lotus root, the carbon nanocoils (CNCs) with large aspect ratio (acting as the lotus root fibers) is used as a conductive bridge to connect the fragile Ti 3 C 2 -MXene nanosheet layers, significantly enhancing the sensing range of the sensor. Waterborne polyurethane (WPU) encapsulated strain sensor (Ti 3 C 2 /CNCs/WPU) can achieve GF values and sensing ranges of 474 and 220%, respectively. In addition, this sensor shows reliable responses at different frequencies and can withstand more than 1000 stretch-release cycles. More importantly, the composite strain sensor can accurately sense and monitor different limb movements and human body motion states, showing broad application prospects in real-time human health detection.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Xuqi Hu,Xueting Yu,Zongxing Yu,Siyi Li,Tao Jin,Yufang Chen
MXene is a typical kind of 2D material with high specific surface, electrial conductivity, self-lubrication and abundant surface groups, which has received wide attention in the fields of electrochemistry, lubrication, sensors and electromagnetic shielding. In this work, MXene-containing polymer matrix composites (MHMA@ Ti 3 C 2 ) are prepared to enhance the humidity response properties of conventional polyacrylate humidity sensitive materials. The result shows that the humidity response curve of MHMA@ Ti 3 C 2 humidity film shows good linearity (R 2 = 0.9992) in the relative humidity range of 30–90 %RH, with a high sensitivity of 63.7 kΩ/%RH. Meanwhile, the humidity response/recovery time of the MHMA@ Ti 3 C 2 humidity film shortened from 310 s/312 s to 30 s/35 s, resulting in a much faster response speed. The wet hysteresis was reduced from 2.1 %RH to 0.34 %RH, and the lowest temperature change coefficient was reduced from 0.60 %RH/℃ to 0.44 %RH/℃ compared with MHMA. In the composites, MXene component significantly enhances the electronic migration capability during the humidity response, which improved the humidity-sensitive properties of the composites, and at the same time enhanced the response speed and temperature change resistance of the composites.
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CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Beibei Zhu,Jun Shi,Chongchong Liu,Jingguo Li,Shaokui Cao
As a novel two-dimensional material, Ti 3 C 2 MXenes has attracted lots of attention in biomedical filed for its large surface area and excellent near-infrared (NIR) responsiveness. In this paper, an in-situ growth and self-assembly approach was employed to combine gold nanorods (GNRs) with Ti 3 C 2 nanosheets to prepare intelligent sandwich-like Ti 3 C 2 @GNRs/PDA/Ti 3 C 2 nanohybrids . Compared with Ti 3 C 2 nanosheets, in-situ growth Ti 3 C 2 @GNRs possessed excellent photothermal conversion efficiency (45.89%), caused by the distinguished photothermal synergy between GNRs and Ti 3 C 2 nanosheets. Moreover, the high specific surface area of Ti 3 C 2 MXene and outstanding adhesion performance of PDA endowed Ti 3 C 2 @GNRs/PDA/Ti 3 C 2 nanohybrids with superior drug loading ability for doxorubicin hydrochloride (DOX) (95.88%). Besides, Ti 3 C 2 @GNRs/PDA/Ti 3 C 2 nanohybrids displayed distinct pH/NIR responsive drug release properties upon NIR irradiation owing to the strong π-π stacking interaction between Ti 3 C 2 @GNRs/PDA/Ti 3 C 2 and DOX, along with the excellent NIR-responsiveness of Ti 3 C 2 @GNRs/PDA/Ti 3 C 2 . This paper offers a practicable method to prepare Ti 3 C 2 MXene-based nanoplatform with synergistically enhanced NIR drug release behavior, brilliant biocompatibility and high drug loading efficiency, which is expected to be applied in remote cancer therapy.
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ELECTROCHIMICA ACTA
·
2019
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IF 5.383
Jialun Chen,Ping Tong,Lingting Huang,Zhonghua Yu,Dianping Tang
An interdigitated capacitance immunosensing system based enzymatic biocatalytic precipitation on micro-comb electrode was designed for the sensitive detection of prostate-specific antigen (PSA) by coupling Ti 3 C 2 MXenes with tyramine signal amplification strategy. The immunosensor was prepared by immobilizing anti-PSA capture antibody on MXenes-coated interdigitated electrode, whereas gold nanoparticles heavily functionalized with horseradish peroxidase (HRP) and detection antibody were utilized as the signal-transducer tags. Introduction of interdigitated electrode was expected to enhance the sensitivity of capacitance immunosensor. This system mainly consisted of the sandwich-type immunoreaction, formation of tyramine-HRP repeats on gold nanoparticle and enzymatic biocatalytic precipitation. The concatenated HRP through the tyramine oxidized numerous 4-chloro-1-naphthol molecules into insoluble benzo-4-chlorohexadienone with the help of H 2 O 2 , and coated the modified immunosensor to keep free ions away from the electrode, thus causing the local alteration in the capacitance. Under optimum conditions, the change of the immunosensor in the capacitance increased with the increasing target PSA concentrations from 0.1 ng mL −1 to 50 ng mL −1 at a detection limit of 0.031 ng mL −1 . Moreover, the interdigitated capacitance immunosensor showed good reproducibility, high specificity and acceptable accuracy for the analysis of human serum specimens in comparison with those obtained from commercial human PSA ELISA kit. Importantly, Ti 3 C 2 MXenes-based interdigitated capacitance transducer open new opportunities for protein diagnostics and biosecurity.
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LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
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IF 6.6
Fang Li,Panpan Dong,Zijian Wu,Lu Xue,Mingming Luo,Yijun Tan,Haitao Li,Xu Yang
Aflatoxin B1 (AFB1) is a highly toxic mycotoxin and widely distributed in food matrixes, posing a serious threat to human health. In this work, a novel sensing platform based on liquid exfoliated graphene/Ti 3 C 2 MXene (LEG/Ti 3 C 2 MXene) nanocomposite was proposed to achieve ultrasensitive detection of trace AFB1 in response to the urgent issue, in which the LEG/Ti 3 C 2 MXene nanocomposites modified indium tin oxide (ITO) electrode acted as transducer, ferrocene (Fc) labeled aptamer (Fc-Apt) and methylene blue (MB) labeled complementary DNA (MB-cDNA) functioned as dual-signal probes, and the conformational change of hairpin-aptamer was regarded as signal “on-off” switch. The irregular Ti 3 C 2 MXene flakes interspersed between LEG sheets layer provided assistance in enhancing sensing performance, specifically, it not only effectively reduced the self-stacking and increased the specific surface area, but also provided multiple interlayer spacing to improve electron transfer efficiency. In the presence of AFB1, its competition with MB-cDNA led to the reappear of hairpin structure for Fc-Apt and the releasing of MB-cDNA, resulting in the removal of MB and fixing Fc close to the electrode surface. As a result, the peak current ratio of Fc to MB (I Fc to I MB ) would change accordingly, which served as the basis for qualitative analysis of AFB1. Under the optimal conditions, the constructed aptasensor exhibited excellent sensitivity with a wide linear range from 0.0001 to 100 ng/mL and a low limit of detection (LOD) of 0.041 pg/mL, as well as satisfactory selectivity, reproducibility, and stability, revealing its promising potential applications in food safety monitoring.
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RSC Advances
·
2025
·Vol. 15
·期 41
·33905-33915
·
IF 4.6
Fang Li,Panpan Dong,Zijian Wu,Lu Xue,Mingming Luo,Yijun Tan
As ubiquitous pollutants, heavy metal ions can accumulate in the food chain, increasing toxicity through synergistic effects and posing health risks to humans and other organisms. In this study, we successfully developed a dual-signal aptasensing interface for simultaneous detection of cadmium ions (Cd2+) and lead ions (Pb2+). The 2D layered Ti3C2 MXene and liquid exfoliated graphene (LEG) composite nanomaterials were employed as ITO electrode modification materials, which exhibited enhanced electrochemical properties. The Cd2+-specific aptamer labeled with Nile blue and Pb2+-specific aptamer labeled with ferrocene bind to their complementary strands immobilized on the electrode surface, resulting in a dual-signal interface. In the presence of target ions, the aptamers specifically recognized and captured the targets, subsequently detaching from the electrode surface, leading to changes in the dual-signals and thereby enabling simultaneous detection of Cd2+ and Pb2+. The limits of detection for Cd2+ and Pb2+ were determined to be 0.689 pM and 1.548 pM, with linear response ranges of 0.1 pM to 10 μM and 0.01 pM to 10 μM. The effectiveness of the proposed aptasensor in determining Cd2+ and Pb2+ simultaneously in water and vegetables has been demonstrated, providing substantial evidence for its potential application in food safety and environmental monitoring.
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PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
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IF 4.4
Xun Zhou,Juerui Zhang,Dongyan Huang,Yinhui Yi,Kechen Wu,Gangbing Zhu
In this work, a ratiometric fluorescence sensing platform was established to detect Cu 2+ and D-PA ( d -penicillamine) based on nitrogen-doped Ti 3 C 2 MXene quantum dots ( N -MODs) that was prepared via a simple hydrothermal method and exhibited strong fluorescent and photoluminescence performance as well as excellent stability. Since the oxidation reaction between o -phenylenediamine (OPD) and Cu 2+ induced the formation of 2,3-diaminophenazine (ox-OPD) which not only can emerge an emission peak at 570 nm, but also inhibit the fluorescence intensity of N -MQDs at 450 nm, a ratiometric reverse fluorescence sensor via fluorescence resonance energy transfer (FRET) was designed to sensitively detect Cu 2+ , where N -MQDs acted as energy donor and ox-OPD as energy acceptor. More importantly, another considerably interesting phenomenon was that their catalytic oxidation reaction can be restrained in the presence of D-PA because of the coordination of Cu 2+ with D-PA, further triggering the obvious changes in ratio fluorescent signal and color, thus a ratiometric fluorescent sensor of determining D-PA was proposed also in this work. After optimizing various conditions, the ratiometric sensing platform showed rather low detection limits for Cu 2+ (3.0 nM) and D-PA (0.115 μM), coupled with excellent sensitivity and stability.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Keqing Zhou,Kaili Gong,Chenchao Wang,Mengqing Zhou,Jun Xiao
In this work, a bilayer nanocoating was constructed on the surface of flexible polyurethane (FPU) foam with Ti 3 C 2 MXene and polyethyleneimine-modified silica nanoparticles (mSiO 2 -NP@PEI) through layer-by-layer self-assembly technology, successfully obtaining modified flexible polyurethane composites (MFPU) with excellent flame retardancy, photothermal conversion and solar water desalination properties. The structure and morphology of MFPU foams were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Transmission electron microscope (TEM) and Scanning electron microscope (SEM). The MFPU with three coating cycles (MFPU3) had the best flame retardancy and smoke suppression performances, mainly in terms of decreased peak heat release rate (pHRR), peak smoke production rate (pSPR) and total smoke production (TSP) by 71.3 %, 62.1 % and 74.5 %, respectively, compared to those of neat FPU. In addition, MFPU foams exhibited extraordinary light-to-heat conversion and solar water desalination capabilities. MFPU3 could reach 120 °C in 138 s and its steam conversion efficiency η was as high as 89.6 %, which was 116.0 % higher than that of unmodified foam and had a 262.8 % increase over pure water. The flame retardant MFPU foams with excellent photothermal conversion efficiency will exhibit great application potential in solar water desalination and power generation.
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PubMed
高影响因子
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