CARBON
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2017
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IF 6.337
Li Zhou,Fangming Wu,Jinhong Yu,Qihuang Deng,Faai Zhang,Guan Wang
Synthesis of fluorescent carbide-derived carbons (CDCs) remains a big challenge for material scientists. Herein, we report an unprecedented method for the synthesis of amphiphilic carbide-derived graphene quantum dots (GQDs) from layered Ti 3 C 2 T x MXene using solvothermal treatment of Ti 3 C 2 T x MXene in dimethylformamide (DMF). Our findings indicate that DMF can simultaneously act as reaction media and nitrogen-doping agent for the formation of highly fluorescent carbide-derived GQDs. The resulted GQDs with uniform size distribution exhibit excellent dispersibility in both hydrophilic solvents (e.g., water, DMF, and ethanol) and in hydrophobic solvents (e.g., chloroform and toluene). With their superior properties of bright and tunable photoluminescence , low cytotoxicity, good photostability and chemical inertness , the carbide-derived GQDs are promising for applications in fluorescent ink, light-emitting composites and cellular imaging as demonstrated in this paper. This work opens a new route towards the large-scale synthesis of high-quality GQDs, paving the way for their versatile applications.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
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IF 7.1
Fenghe Duan,Chuanpan Guo,Mengyao Hu,Yingpan Song,Minghua Wang,Linghao He,Zhihong Zhang,Riccardo Pettinari,Liming Zhou
A promising nanocarrier of the complementary DNA (cDNA) toward miRNA-155 was synthesized on the basis of the nanohybrid type of Ti 3 C 2 T x MXene nanosheets decorated using iron phthalocyanine quantum dots (FePc QDs) (denoted as Ti 3 C 2 T x @FePcQDs) to construct a novel ultrasensitive impedimetric aptasensing system for microRNA-155 (miRNA-155). Owing to π–π* stacking interaction between Ti 3 C 2 T x nanosheets and FePc QDs, the homogeneous nanostructure of the Ti 3 C 2 T x @FePcQD nanohybrid that comprises mixed-valence states (Ti 2+ /Ti 3+ and Fe 2+ /Fe 3+ ), multicomponent (Ti-O and Ti-C), and various N-related groups was achieved. The constructed Ti 3 C 2 T x @FePcQDs-based aptasensor displayed an ultrahigh sensitivity for detecting miRNA-155 with a low detection limit of 4.3 aM (S/N = 3) within the miRNA-155 concentration ranging from 0.01 fM to 10 pM. Compared with the individual component-based aptasensors and other reported miRNA-155 aptasensors, the proposed impedimetric aptasensing system exhibited substantial merits of a feasible preparation process, non-use of labels or electrochemical indicators, fast response time, and comprehensive sensing performances for detecting miRNA-155. This strategy for determining miRNAs can extensively be applied as the platform for anchoring other kinds of aptamers in detecting diverse targets, thus indicating its great potential application for the early diagnosis of cancer biomarkers.
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高影响因子
MICROCHEMICAL JOURNAL
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2021
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IF 4.821
Yunfei Wang,Wenjie Sun,Yixiao Li,Xuming Zhuang,Chunyuan Tian,Feng Luan,Xiuli Fu
Human immunodeficiency virus (HIV) is still a significant global health concern. Hence, developing a rapid and sensitive method for the detection of HIV is important in early detection. In this paper, we focus on the preparation of a sensitive electrochemical luminescence (ECL) biosensor that uses Ti 3 C 2 T x modified ZIF-8 as an ECL emitter to detect HIV-1 protein. This ECL biosensor used 0.05 M K 2 S 2 O 8 as the co-reactant and conductive carbon black combined with magnetic nanoparticles as the quenching agent. Under the optimized experimental conditions, the relationship was linear in the range from 1 fM to 1 nM (R 2 = 0.993) and the detection limit was 0.3 fM (S/N = 3). Finally, we used the constructed Ti 3 C 2 T x /ZIF-8 nanocomposites to detect HIV-1 in real serum samples and obtained great recoveries. The results demonstrated that this biosensor, which not only exhibited improved electrical conductivity but also demonstrated an excellent ECL response, could be a promising candidate for HIV-1 detection.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
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IF 5.1
Siraj Ullah,Waqas Ahmed,Shuozhen Hu,Xinsheng Zhang
Electrochemical water splitting is a potential method for sustainable hydrogen production. Achieving efficient and durable bifunctional electrocatalysts for alkaline water splitting remains challenging due to sluggish OER/HER kinetics and a reliance on noble metals. Here, we introduce MX-CoFe/EMN, a binder-free hybrid electrocatalyst fabricated by sequential electrodeposition of Ti 3 C 2 T x MXene integrated CoFe layered double hydroxide (LDH) nanosheets onto nickel foam. Combining CoFe LDH with MXene, which serves as both conductive scaffold and active component, yields beneficial interfacial electronic interactions, enhanced charge transfer, and a high density of active sites. In 1.0 M KOH, MX-CoFe/EMN shows low overpotentials of 260 mV (OER) and 279 mV (HER) at ±100 mA cm −2 , small Tafel slopes 39 mV dec −1 (OER), 68 mV dec −1 (HER), and excellent durability of over 80 h at ±500 mA cm −2 . These findings demonstrate a scalable electrodepositin-based approach for developing highly active and durable non-noble-metal electrocatalysts for sustainable hydrogen generation.
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ANALYTICA CHIMICA ACTA
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2023
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IF 6.2
Tingting Liu,Ruiyong Zhou,Kechen Wu,Gangbing Zhu
Nanozymes were emerged as the next generation of enzyme-mimics which exhibit great applications in various fields, but there is rarely report in the electrochemical detection of heavy metal ions . In this work, Ti 3 C 2 T x MXene nanoribbons@gold (Ti 3 C 2 T x MNR@Au) nanohybrid was prepared firstly via a simple self-reduction process and its nanozyme activity was studied. The results showed the peroxidase-like activity of bare Ti 3 C 2 T x MNR@Au is extremely weak, while in the presence of Hg 2+ , the related nanozyme activity is stimulated and improved remarkably, which can easily catalyze oxidation of several colorless substrates (e.g., o-phenylenediamine) to form colored products. Interestingly, the product of o-phenylenediamine exhibits a strong reduction current which is considerably sensitive to the Hg 2+ concentration. Based on this phenomenon, an innovative and highly sensitive homogeneous voltammetric (HVC) sensing strategy was then proposed to detect Hg 2+ via transforming the colorimetric method into electrochemistry since it can exhibit several unique advantages (e.g., rapid responsiveness, high sensitivity and quantificational). Compared to the conventional electrochemical sensing methods for Hg 2+ , the designed HVC strategy can avoid the modification processes of electrode coupled with enhanced sensing performances. Therefore, we expect the as-proposed nanozyme-based HVC sensing strategy provides a new development direction for detecting Hg 2+ and other heavy metals.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Xin Jin,Wenshu Zhang,Siyang Liu,Tianpeng Zhang,Zihui Song,Wenlong Shao,Runyue Mao,Man Yao,Xigao Jian,Fangyuan Hu
To improve sluggish reaction kinetics and solve the severe self-stacking of MXene-based anodes for sodium ion batteries (SIBs), a novel highly stable sandwich-like structure with tunable interspace supported by dense N -rich polymer hydrogen-bonding network is synthesized for improving the pseudo-capacitance of Ti 3 C 2 T x MXene. The interconnected MXene-based sandwich structure can establish the stable conductive framework, abundant active sites and tunable interspace that provide channels for rapid Na + storage. Besides, the dense polymer hydrogen-bonding network can effectively prevent interlayer restacking for ultra-stable Na + storage. After modification, the N contents of Ti 3 C 2 T x MXene are increased to 21.63 at %. N -rich polymer network not only provides extra active sites for pseudo-capacitance Na + storage, but also accelerates Na + transport and charge transfer. As the anode for half-cell of SIBs, it shows excellent cycling performance of 148.4 mAh g −1 after 3000 cycles at 500 mA g −1 with capacity retention of 102.4 % and 123.4 mAh g −1 after 5000 cycles at 1000 mA g −1 . The performance of full-cell based on the optimized composite anode and Na 3 V 2 (PO 4 ) 3 (NVP) cathode is superior to other MXene-based full-cell of SIBs. The novel sandwich-like structure delivers a perspective for enhancing the stability and achieving fast Na + diffusion of layer structure by polymer hydrogen-bonding network.
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ENERGY & FUELS
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2021
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IF 3.605
Xianjie Liu,Fankai Lin,Xiaoguang Zhang,Mingyong Liu,Zhenhua Sun,Liangpei Zhang,Xin Min,Ruiyu Mi,Zhaohui Huang
The application of phase-change materials (PCMs) for solar energy utilization and thermal energy storage is limited by their low thermal conductivity, undesirable solar-thermal conversion efficiency, and poor shape stability. Here, the novel paraffin/Ti3C2Tx@gelatin (PA/T@G) composite PCMs were successfully obtained by encapsulating paraffin (PA) into gelatin aerogels modified by Ti3C2Tx nanosheets. Three-dimensional (3D) porous gelatin aerogel acted as a favorable supporting material for PA with large enthalpy, while the Ti3C2Tx nanosheets contributed to enhancing the thermal conductivity and converting solar energy into thermal energy by trapping photons and heating molecules. The results exhibited that the composite PCMs had high load rates (96.3–97.7%) and large melting enthalpies (184.7–199.9 J/g). The thermal conductivity of PA/T-30@G was 0.919 W/(m·K), which reached up to 3.48 times that of PA, and the solar-thermal conversion efficiency of the composite PCMs was greatly improved via the introduction of Ti3C2Tx nanosheets. Notably, the composite PCMs with good shape and thermal stability is a promising material for solar-thermal energy storage applications.
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POLYMER
·
2023
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IF 4.6
Haowen Sun,Qiuru Bao,Gang Chen,Shulong Wu,Yuan Liu,Qi Wang
With the development of microelectronics and flexible wearable electronic devices, poly(vinyl alcohol) (PVA) based thermal interface materials (TIMs) have received much attention. However, poor heat dissipation and high flammability have emerged as the key issues that restrict their application. In this work, the directional alignment of phytic acid (PA) modified boron nitride nanosheets (BNNS) and Ti 3 C 2 T x MXene in PVA matrix was achieved by ice-templated assembly, which simultaneously enhanced the flame retardancy and thermal conductivity of PVA composite films (PVA/BT x ). Owing to the synergistic effect between oriented BNNS and Ti 3 C 2 T x MXene on forming the thermally conductive network within PVA matrix, the in-plane thermal conductivity of PVA/BT x -30 composite film was increased to 8.54 W m −1 K −1 , much higher than that of PVA film (0.30 W m −1 K −1 ). Meanwhile, the heat dissipation process of PVA films applied as TIMs was simulated, which showed that PVA/BT x -30 films exhibited excellent thermal conduction and significantly decreased the operation temperature of electronic devices. Additionally, the peak heat release rate (PHRR) and total heat release (THR) of PVA/BT x -30 films were reduced by 60.3% and 62.0%, respectively, showing good flame retardancy. Importantly, the flexible Ti 3 C 2 T x nanosheets further enhanced the mechanical properties of PVA/BT x composite films. Therefore, this work provides an effective method for the preparation of high thermal conductivity and flame retardant composite materials, which has important potential applications in the microelectronics industry.
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CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Songyang Qian,Zeyu Yuan,Guangshe Li,Dongdong Li,Junzhi Li,Wei Han
The room temperature sodium-sulfur battery has attracted researchers' attention due to its ultra-high energy storage capacity and extremely low cost, but its poor cycling performance and severe dissolution of sodium polysulfide hinder its practical application. Here, we report a stable MXene derived composite sulfur host material based on nickel hydroxide coated with carbon nano network, to achieve the adsorption and conversion of sodium polysulfides. Due to the physical constraints provided by the closed layered structure and the synergistic effect of MXene adsorption and Ni(OH) 2 catalytic activity, the shuttling effect is effectively suppressed. The ex-situ analysis of electrode after reaction shows that the composite material has strong adsorption on polysulfides. In addition, Ni(OH) 2 can also accelerate the reaction process from sulfur to sodium sulfide. Therefore, Ti 3 C 2 T x /Ni(OH) 2 /C/S composite cathode can provide extraordinary reversible capacity 1175.3 mAh/g at 0.22C after 100 cycles and excellent long cycle stability (673.5 mAh/g at 2.2 C with a low decay rate of only 0.032% per cycle over 800 cycles).
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
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IF 5.2
Yuncong Yang,Wenmin Song,Balaji Murugesan,Xiuwen Cheng,Mingming Jiang,Zhuo Chen,Beifa Yan,Yurong Cai
Flexible strain sensors have attracted the attention of researchers due to their wide range of applications in wearable electronic skin and healthcare monitoring. The fabrication of flexible strain sensors with high strength , good linear sensitivity, stability and comfort is still challenging. Here, an anisotropic silk fibroin (SF) based hydrogel is fabricated through an oriented freezing method and a low-temperature concentration is to follow. This approach combines HA with SF to increase the hydrogel's water-holding capacity, and Ti 3 C 2 T x MXene is doped as a conductive-sensitive component. Benefitting from the synergy of its well-designed components and the oriented internal crosslinking network structure, the hydrogel has a wide working range and a stable resistance response under 0∼80% compression strain. Especially the oriented hydrogel has ultra-high compression resilience (∼ 99%) in the orientation direction, and it is stable and durable for up to 10,000 cycles under 50% compression self-rebound. Flexible sensors made of conductive hydrogel were attached to the human body or combined with out-of-body clothing to detect human movement. Based on these findings, the prepared conductive hydrogel could be used as a wearable strain sensor material.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
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IF 18.5
Zhixin Jia,Jingbin Zhang,Zengtao Ji,Jiaran Zhang,Xinting Yang,Ce Shi,Xia Sun,Yemin Guo
Hydrogen sulfide (H 2 S) contamination of food has raised widespread public health concerns, leading to substantial medical and economic burdens. Herein, a 2D/0D heterojunction fluorescent probe (TCTG) with Schottky barriers (SB) is designed and synthesized, utilizing Ti 3 C 2 T x MXene-loaded graphene quantum dots (GQDs), for the detection of H 2 S during food spoilage. The microstructures observed through SEM and TEM reveal that uniformly sized GQDs are evenly attached to the surface of a monolayer Ti 3 C 2 T x . The chemisorption between GQDs and Ti 3 C 2 T x facilitates charge transfer and the formation of SB, resulting in intramolecular charge transfer (ICT) effects. With the introduction of H 2 S, TCTG (50%) exhibits the highest sensitivity, selectivity, and anti-interference properties, with ultra-fast fluorescence transient reaction (3s) and remarkably low detection limit of 41.82 ppb as well as noticeable color change. When TCTG (50%) reacted with H 2 S, the ICT effects are inhibited, leading to the recovery of photoinduced electron transfer (PET) and fluorescence quenching. Notably, probe TCTG is effectively utilized to detect changes in H 2 S levels in raw foods to assess their quality. Overall, the significance of this study is its potential to revolutionize food spoilage detection, offering a fast, reliable, and sensitive method to ensure food safety and reduce associated health and economic burdens.
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Analytical Methods
·
2024
·
IF 2.7
Jing Li,Xun Zhou,Guanghua Mao,Gangbing Zhu,Yinhui Yi
In recent years, numerous colorimetric methods have been developed for the detection of silver ions (Ag+), yet there remains a need for a simple, sensitive, real-time and quantitative sensing platform. Herein, Ti3C2Tx MXene nanoribbons (Ti3C2TxNRs) were utilized as the carrier material, and gold@platinum (Au@Pt) bimetallic nanoparticles were decorated onto the Ti3C2TxNR surface, for the first time, via a facile self-reduction method. The resulting Au@Pt–Ti3C2TxNR nanohybrid exhibited excellent catalytic activity, facilitating the oxidation of 3,3′,5,5′-tetramethylbenzidine, a colorless substrate, to generate a blue product (oxTMB), displaying prominent peroxidase-like activity. In the presence of Ag+, a remarkable inhibiting effect was observed on the catalytic activity of the Au@Pt–Ti3C2TxNR nanohybrids, effectively halting the generation of oxTMB. Based on this, the as-obtained Au@Pt–Ti3C2TxNR nanozyme was then utilized to develop a novel colorimetric sensing platform for Ag+ detection, with a low detection limit of 1.57 nM and a wide linear detection range from 5.0 nM to 9.0 μM. In addition, by combining the unique advantages of hydrogel materials and smartphone technology, a simple, real-time and quantitative platform for Ag+ monitoring was constructed, highlighting its potential for practical applications in Ag+ detection.
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PubMed
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