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.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
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.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Yuhua Dong,Xueyan Du,Yutong Xie,Kexin Wu,Qiong Zhou
A quaternary composite of Ti 3 C 2 /TiO 2 /TiN/polyaniline was synthesized by doping TiN nanoparticles on the calcined Ti 3 C 2 MXene nanosheets , and then polyaniline was deposited through chemical oxidation . The bandgap and flat band potential of composite were determined by X-ray diffraction and ultraviolet–visible spectroscopy. In order to prepare photoanode and photocathodic protective coating, the quaternary composite was added to the polyvinyl alcohol solution and epoxy resin to. Photoelectrochemical results indicated that photoanode and relevant photocathodic protective coating had similar photocurrent with about 5 μA cm −2 , but open circuit potential of the photocathodic protective coating was more negative than that of photoanode. The R ct of photoanode with illumination was 5.5 kΩ, while that of photocathodic coating was 136 kΩ. The 304 stainless steel could be well protected by the photoanode and photocathodic protective coating whether illumination or not, due to synergistic effect of local surface plasmonic resonance of TiN, “electron pool” of polyaniline and non-interfacial contact of TiO 2 and MXene. Moreover, the epoxy resin in the photocathodic coating could act as a kind of physical barrier in the dark environment. Additionally, results of long-term protection test indicated that the photocathodic protective coating under intermittent illumination had better protection property than that of the coating without illumination.
研究领域:
材料科学
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电化学
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防腐蚀工程
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DOI
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 12
·1-10
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IF 6.408
Shi Yanmei,Hu Kai,Mei Lin,Yang Xueming,Shi Yange,Wu Xiangxiang,Li Xiu-min,Miao Mingsan,Zhang Sisen
A novel SnO 2 quantum dots (SnO 2 QDs)-functionalized Ti 3 C 2 MXene nanocomposite was prepared via in situ synthesis method, resulting in well-regulated the nucleation and growth of SnO 2 QDs to evenly distribute onto MXene nanosheets. Ultra-small size SnO 2 QDs decorated on the surface of Ti 3 C 2 MXene nanosheets can effectively prevent the restacking of MXene and remarkably increase the electroactive surface area of the electrode, which can further increase electrocatalytic activity toward dopamine. Then, an ultrasensitive electroanalytical method based on SnO 2 QDs-functionalized Ti 3 C 2 MXene nanocomposite for dopamine monitoring was developed, and the effects of experimental condition were investigated systematically. Under optimized conditions, the prepared sensor presented a linear dependence for dopamine in the concentration range from 0.004 to 8.0 µM with the detection limit of 2.0 nM (S/N = 3). Moreover, it selectively perceived dopamine in presence of physiological interferents in urine and serum samples with excellent linearities (correlation coefficients higher than 0.9920). The relative recoveries were in the range 97.67–105.3% and 103.0–106.8%, while the limits of quantitation were 10.12 nM and 9.62 nM in urine and serum sample, respectively, demonstrating the method suitability for dopamine sensing and being envisioned as a promising candidate for neurotransmitter monitoring in biological diagnosis. Graphical Abstract
研究领域:
材料科学
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分析化学
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生物医学
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
·
IF 4.598
Xiao Zhang,Dong An,Zhaoshun Bi,Wei Shan,Beibei Zhu,Long Zhou,Liangmin Yu,Han Zhang,Shuwei Xia,Meng Qiu
High-resolution electrochemical sensors with excellent sensitivity and selectivity are urgently needed for simultaneous monitoring of heavy metal ions (HMIs) in the environment. In this study, a nitrogen-doped carbon-coated Ti 3 C 2 -MXene heterostructure (Ti 3 C 2 @N-C)-based electrochemical sensor was developed for simultaneously determining (Cd 2+ ) and (Pb 2+ ) in seawater and tap water via square wave anodic stripping voltammetry (SWASV). The sensor exhibits excellent performance with a low limit of detection (LOD) (Cd 2+ 2.55 nM, Pb 2+ 1.10 nM), as well as excellent selectivity in the presence of interfering ions (Zn 2+ , Fe 3+ , Fe 2+ , Co 2+ , Ni 2+ , Mn 2+ , Cu + , Cu 2+ , and K + ) and high resolution for simultaneous detection of Cd 2+ and Pb 2+ . The N-C and Ti 3 C 2 -MXene heterostructure improves the conductivity of the composites by accelerating the electron transfer. The nitrogen-doping in Ti 3 C 2 @N-C provides adsorbent sites for electrons to coordinate with HMIs. Due to the heterostructure and the coordination by nitrogen, the interface charge transfer is enhanced and the number of selective adsorption sites is increased, improving the metals determination performance. This study proposes a new strategy for improving the electrochemical characteristics of Ti 3 C 2 -MXene by using heterostructure and nitrogen-doping effect, and develops a highly sensitive sensor for selective and simultaneous determination of HMIs.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS
·
2018
·
IF 1.707
Xiaolu Fan,Yao Zhang,Yunfeng Zhu,Xinli Guo,Jian Chen,Liquan Li
Our previous work found that Li 1.3 Na 1.7 AlH 6 possesses the lowest dehydrogenation onset temperature and the most favorable dehydrogenation thermal stability among Li-Na-Al-H compounds (Fan et al., 2017). In this work, additional Ti 3 C 2 was introduced into Li 1.3 Na 1.7 AlH 6 by ball milling to further enhance its dehydrogenation performances. According to the volumetric release curves, the initial dehydrogenation temperature of the sample Li 1.3 Na 1.7 AlH 6 + 5 wt.%Ti 3 C 2 was lowered by 35 K from that of the pristine Li 1.3 Na 1.7 AlH 6 . The dehydrogenation enthalpy values of Li 1.3 Na 1.7 AlH 6 + 5 wt.%Ti 3 C 2 (46.9 KJ mol H 2 −1 ) was also slightly lower than that of pristine Li 1.3 Na 1.7 AlH 6 (49.7 KJ mol H 2 −1 ). It means that the doped Ti 3 C 2 was actively involved in the reaction with Li 1.3 Na 1.7 AlH 6 during the dehydrogenation process. The investigation by X-ray photoelectron spectroscopy (XPS) demonstrated that the reaction between Ti element and Li 1.3 Na 1.7 AlH 6 was definitely carried out in which the zero valence of Ti was transformed into Ti 3+ .
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Shuxian Dai,Mengting Hu,Wen Zhang,Zhen Lei
Background Carbosulfan (CBS) is a widely used carbamate pesticide in agricultural production, its easy decomposition into hypertoxic carbofuran poses serious threats to human health and food safety. Therefore, sensitive and accurate detection of CBS is of significant importance. Conventional chromatography-based techniques require expensive instruments and complicated sample pretreatment, limiting their application for fast detection. Current electrochemical and colorimetric methods for detection of pesticides based on the cascade catalytic reactions between acetylcholinesterase (AChE) and nanozymes, which exhibit inferior selectivity. Hence, selective, sensitive and fast detection of CBS is still challenging. Results In this work, an AChE-free colorimetric method was proposed for selective detection of CBS based on its unique hydrolysis behavior and nanozyme. Ti 3 C 2 nanosheets/AuPt nanoparticles (Ti 3 C 2 /AuPt NPs) with enhanced peroxidase-like activity were prepared via one-step self-reduction reaction. CBS can be hydrolyzed under acidic condition and produce –SH moieties, which could bond to Pt atoms of Ti 3 C 2 /AuPt NPs and shield the active sites of nanozyme, resulting in decreased catalytic activity. Based on the inhibitory effect on the peroxidase-like activity of Ti 3 C 2 /AuPt NPs, a colorimetric method was proposed for direct detection of CBS. Under optimal conditions, the method showed wide linear range (0.5 ng mL −1 -5 μg mL −1 ), low limit of detection (0.342 nM), good selectivity and anti-interference ability. The feasibility of this method for practical use was confirmed by analysis of CBS in real lake water samples. Significance This work proposed a simple colorimetric method for selective and fast detection of CBS, which avoided employing AChE and cascade catalytic reactions, significantly lowering the detection cost and improving detection efficiency. The method showed great potential for accurate detection of CBS in actual samples, and provided a new avenue for developing nanozyme-based colorimetric method for detection of other pesticide residues.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Ziyu Yao,Luyang Zuo,Huan Yang,Bin Qin,Xiaolong Li,Jinzeng Wang,Fang Wang
A ternary composite of Ti 3 C 2 quantum dots, hydroxypropyl methylcellulose, and Bi 2 WO 6 effectively harnesses both optical and mechanical energy to achieve a strong piezo-phototronic effect for the removal of tetracycline hydrochloride. Under external mechanical stress, this system maintains a tightly integrated heterostructure, dynamically facilitating charge transfer across the nanosheets. Notably, the catalytic activity of the Ti 3 C 2 quantum dots/hydroxypropyl methylcellulose/Bi 2 WO 6 composite has been significantly enhanced, exhibiting a kinetic rate constant of 0.146 min −1 , which is 9.7 and 7.3 times higher than that of Bi 2 WO 6 under pure photocatalytic and piezocatalytic conditions, respectively. The enhanced piezo-photocatalytic performance can be attributed to several synergistic factors: (i) Charge carriers move in the direction of external forces while holes move in the opposite direction, reducing the recombination efficiency of photoexcited electrons and holes; (ii) The good dispersibility and abundant hydroxyl groups of hydroxypropyl methylcellulose enable the even distribution of Ti 3 C 2 quantum dots. Moreover, they form strong hydrogen bonds between Ti 3 C 2 quantum dots and Bi 2 WO 6 , significantly promoting charge transfer and system stability; (iii) Ti 3 C 2 quantum dots serve as electrons accepter of photogenerated carriers on the surface of Bi 2 WO 6 nanoplates, accelerating the separation and migration of photoelectrons. This work demonstrates the successful construction of a stable organic–inorganic ternary catalytic system and elucidates its underlying mechanism, offering a promising strategy to boost the piezo-phototronic effect in advanced wastewater treatment applications.
研究领域:
环境科学
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材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Mingxia Li,Haiyan Wang,Xiaoxia Wang,Qiujun Lu,Haitao Li,Youyu Zhang,Shouzhuo Yao
Photoelectrochemical (PEC) sensing has emerged as a simple and practical method for the analysis and detection, its separated optical signal and detection electrical signal give it the advantages of reduced background noise and outstanding sensitivity. Here, we synthesized a Ti 3 C 2 /Cu 2 O composite through simple oil bath heating process, whose excellent PEC performance and sensitive photoelectric response to glucose make it a propitious substitution to glucose oxidase . On this basis, we construct a PEC non-enzymatic sensor based on the Ti 3 C 2 /Cu 2 O heterostructure for the detection of glucose. Under the optimal conditions, the photocurrent of Ti 3 C 2 /Cu 2 O is linear with the logarithm value of glucose concentration in the wide range of 0.5 nM to 0.5 mM with a detection limit of 0.17 nM. Furthermore, the successful detection of glucose in standard samples and human serum by the proposed Ti 3 C 2 /Cu 2 O based PEC non-enzymatic sensor demonstrates the application prospect of heterostructure material in PEC sensor, which provides a new thought for the design and construction of PEC non-enzymatic sensing platform.
研究领域:
生物医学工程
·
分析化学
✓ 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
Nana Tang,Aiting Chen,Yanping Wei,Shuting Shi,Chuanqin Zhou,Quanguo He,Jun Liu
Acyclovir (Acyclovir, ACV) is an antiviral drug which, despite its favorable safety profile, can have systemic adverse effects, following improper use. This study prepared a clay-like two-dimensional transition metal carbide Ti 3 C 2 by etching Ti 3 AlC 2 with LiF and HCl. Carboxylated multi walled carbon nanotubes (Carboxylated multi-walled carbon nanotubes , MWCNTs-COOH) were combined with Ti 3 C 2 using chitosan (Chitosan, CS) as solvent and ultrasonic treatment . The nanocomposite was then modified onto the surface of a glassy carbon electrode (Glassy carbon electrode, GCE) to develop an electrochemical sensor for the detection of ACV. The Ti 3 C 2 -CS-MWCNTs-COOH/GCE nanocomposite was characterized by X-ray diffractometry (X-ray diffractometry, XRD), scanning electron microscope (Scanning electron microscope，SEM), and cyclic voltammetry (Cyclic voltammetry，CV), as well as the electrochemical impedance method (Electrochemical impedance，EIS). The successful preparation of Ti 3 C 2 -CS-MWCNTs-COOH, and the good electrochemical performance of the electrode were verified. Linear scanning voltammetry (Linear scan voltammetry，LSV) was used to quantify the ACV. The linear range of the method is wider than other works (0.05 ∼ 20.0 and 20.0 ∼ 500.0 μM), with a low detection limit (0.088 μM). The sensor achieves sensitive detection of ACV and can be used for the analysis of ACV in pharmaceutical and urine dosage forms , with recoveries of 95.5∼97.6% and 95.6∼97.5%, respectively. For the first time, this sensor utilizes clay-like Ti 3 C 2 with a larger specific surface area in combination with MWCNTs-COOH for ACV detection, which exhibits excellent immunity to interference, repeatability, reproducibility, and stability. This method provides a rapid and sensitive method for the determination of ACV, and lays foundations for developing miniaturized field rapid test detectors.
研究领域:
药理学
·
分析化学
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产品关联
DOI
高影响因子
CARBON
·
2021
·
IF 9.594
Mengyi Peng,Menglei Dong,Wei Wei,Huajie Xu,Chuntai Liu,Changyu Shen
The chemical conversion of the surface termination of 2D transition metal carbides/nitrides (MXenes) has opened up a design space that previously had not been extensively explored for this functional material . Herein, via a simple sealed thermal method, the amino terminated groups were successfully introduced on Ti 3 C 2 MXene surface. The substitution reaction of amino group to hydroxyl group was proposed to elucidate this aminated process. As the amination would reduce the carrier density on the surface of MXene, the electrical conductivity of MXene-NH 2 film decreased, while it still reached a high conductivity of 2.11 × 10 4 S m −1 . This film also possessed an excellent electromagnetic interference shielding effectiveness of 16160 dB cm 2 g −1 . Importantly, although the introduction of amino termination altered Zeta potential value, Zeta potential sign remained negative and the MXene-NH 2 exhibited excellent dispersity in water similar to that of traditional MXenes. Furthermore, the existence of covalent bonds endowed MXene-NH 2 polymer composite film with improved mechanical properties . Compared with that of traditional CMC/MXene film, the tensile strength and fracture energy of CMC/MXene-NH 2 increased by 65.5% and 132.7%, respectively. These results demonstrated that the introduction of amino terminated group on MXene surface would be an effective strategy to obtain higher performance MXene-based films.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Composites Part C: Open Access
·
2021
·
IF 0
Anthony Chun Yin Yuen,Timothy Bo Yuan Chen,Bo Lin,Wei Yang,Imrana I. Kabir,Ivan Miguel De Cachinho Cordeiro,Andrew E. Whitten,Jitendra Mata,Bin Yu,Hong-Dian Lu,Guan Heng Yeoh
MXene is a class of 2D materials exfoliated from ternary carbide and nitride ceramics. During synthesis, etching and delamination conditions affect the quality, overall crystallinity, defects and surface functionalization of MXene flakes. In this article, the morphological structure of MXene (Ti 3 C 2 ) nanosheets under temperature between 20 °C and 60 °C were investigated with the application of Small-Angle Neutron Scattering (SANS) combined with several complementary techniques, such as Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) and X-ray Photoelectron Spectroscopy (XPS). The SANS analysis enabled structural information to be obtained about the Ti 3 C 2 nanosheets, which consists of layers of transition metal carbides in a multilayer lamella morphology. The results showed that a single Ti 3 C 2 layer is approximately 11.4 – 11.8 Å (1.14 – 1.18 nm) in thickness with a 20.3 – 21.5 Å (2.03 – 2.15 nm) interstacking layer gaps. This results in a total thickness of approximately 32 Å (3.2 nm), which was consistent with the model-dependent lamella model analysis. Furthermore, the thickness of the Ti 3 C 2 layer increased by approximately ~2 Å (0.2 nm) when the temperature increased from 20 - 40 to 50 - 60 °C.
研究领域:
材料科学
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纳米技术
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物理化学
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）