COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Qing-Ming Wang,Zhen-Hui Liu,Qiu-Feng Lü
Traditional separation materials based on Ti 3 C 2 T x modification are susceptible to contamination by oily substances and have single performance, which limits their applications in treatment of actual oily wastewater. Here, to improve the hydrophilicity and stability of Ti 3 C 2 T x , EHL-functionalized Ti 3 C 2 T x (EHL-Ti 3 C 2 T x ) was prepared by enzymatic hydrolysis lignin (EHL) forming secondary bonds with the terminal oxygen-containing groups on the surface of Ti 3 C 2 T x . EHL-Ti 3 C 2 T x was further coated on polyurethane (PU) sponge to construct rough structures, enabling the modified EHL-Ti 3 C 2 T x @PU sponge superhydrophilic/underwater superoleophobic wettability to achieve separation efficiency above 99.5% for different oil/water mixtures. Especially, the maximum permeation flux of EHL-Ti 3 C 2 T x @PU for cyclohexane/water mixture separation is up to 231,321 L m −2 h −1 . In addition, the functionalized interface constructed by EHL- Ti 3 C 2 T x on mixed cellulose ester (MCE) membrane exhibits high permeability to malachite green and methylene blue cationic dyes with rejection rates of 99.1% and 98.1%, respectively. Therefore, two separation materials obtained by decorating EHL-Ti 3 C 2 T x on PU and MCE substrates have extremely potential in treating complex wastewater.
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高影响因子
ANALYTICAL CHEMISTRY
·
2022
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IF 8.008
Lijuan Chen,Fan Chen,Gang Liu,Haoliang Lin,Yu Bao,Dongxue Han,Wei Wang,Yingming Ma,Baohua Zhang,Li Niu
Sweat pH is a critical indicator for evaluating human health. With the extensive attention on the wearable and flexible biosensing devices, the technology for the monitoring of human sweat can be realized. In this study, a sensitive, miniaturized, and flexible electrochemical sweat pH sensor was developed for the continuous and real-time monitoring of the hydrogen-ion concentration in human sweat. A flexible electrode was fabricated on the poly(ethylene terephthalate) (PET) substrate by a simple and low-cost screen-printing technology, which was based on the integration of fluoroalkyl silane-functionalized Ti3C2Tx (F–Ti3C2Tx) and the polyaniline (PANI) membrane technology instead of the traditional ion-sensitive membrane. The surface functionalization strategy for Ti3C2Tx with perfluorodecyltrichlorosilane can provide environmental stability. Functionalized Ti3C2Tx (F–Ti3C2Tx) was doped with PANI to obtain improved responsiveness, sensitivity, and reversibility. The constructed microsize, portable, and wearable F–Ti3C2Tx/PANI pH sensor aimed to real-time monitor the pH value of human sweat during exercise. On-body sweat pH monitoring for females and males, respectively, exhibited high accuracy and continuous stability compared with ex situ analyses. This study thus offers a facile and practical solution for developing a highly reliable MXene-based mini-type pH sensor to realize the online monitoring of human sweat pH.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
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IF 9.965
Jing Wang,Tianyi Dai,Yuchen Zhou,Amel Mohamed,Guoliang Yuan,Hongbing Jia
Hydrogel-based wearable sensors have gained great interest on account of their huge application in human-machine interfaces, electronic skin, and healthcare monitoring. However, there are still challenges in designing hydrogel-based sensors with high stability in a wide temperature range, superior adhesion, and excellent sensitivity. Herein, sensors based on oxidized sodium alginate (OSA)/polyacrylamide (PAm)/polydopamine-Ti 3 C 2 T X (PMXene) /glycerol/water (Gly/H 2 O) organohydrogels were designed. The organohydrogels exhibited excellent mechanical properties (elongation at break of 1037%, tensile strength of 0.17 MPa), predominant self-healing ability (self-healing efficiency of 91%), as well as high sensing stability in a wide temperature range (from −20 to 60 °C). The introduction of PDA (polydopamine) and viscous glycerin (Gly) provide organohydrogels with superior adhesion. Organohydrogels sensors demonstrated high sensitivity (Gauge Factor, GF = 2.2) due to the combination of ionic and electron conduction. Sensors could stably detect human movement under different strain levels at high and low temperatures, providing a new solution for wearable sensors in extreme conditions.
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高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 6
·1788-1798
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IF 6.177
Jing Zhao,Yanzhuo Zhang,Hucheng Zhang,Haiyan Wang,Jianji Wang
Hydrogen spillover is an important theme for hydrogen storage and H-involving catalytic reactions. This work shows that catalytic reactivity and selectivity can be revealed by differentiating the energetic characteristics of spilled H species. With the assistance of Ti, F and C in MXenes, Pd1.8Ni@Ti3C2Tx presents a high capacity for spillover hydrogen storage at ambient temperatures, and the rich oxygenated groups act as the main carriers of hydrogen spillover around metal nanoparticles. Thermodynamic analysis reveals that the catalytic performances are energetically dominated by the adsorption enthalpies of the active spilled H species rather than the amount of spillover hydrogen, and can be tuned by alloying and surface modification. The ideas are verified from the excellent catalysis, chemoselectivity and stereoselectivity of Pd1.8Ni@Ti3C2Tx in semihydrogenations. The strategy of maximizing catalytic performances is applicable to other Pd-based bimetals@Ti3C2Tx, such as Pd2.6Co@Ti3C2Tx and Pd1.5Fe@Ti3C2Tx, and provides new energetics perspectives to understand the catalytic mechanism in spillover-involving chemical procedures.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Dingyuan Zheng,Wenrui Yao,Ce Sun,Xiaojian Chen,Zanru Wang,Baiwang Wang,Haiyan Tan,Yanhua Zhang
Frequent oil-spill accidents have posed serious threats to ecosystem balance and the efficiency of resources use. Hydrophobic adsorbents that can adsorb and recover oil without causing secondary pollution are ideal candidates for the remediation of oil contamination in water. However, these composites are inefficient for crude oil-spills cleanup because crude oil has low liquidity of at room temperature. Increasing the temperature can effectively enhance the flowability of crude oil. To achieve efficient crude-oil heating and removal in situ, wood aerogels were immersed in Ti 3 C 2 T x suspensions and then coated with polydimethylsiloxane (PDMS) to obtain a solar-heated adsorbent (PT-WA). The prepared PT-WA exhibits super-hydrophobicity (water contact angle: 154° ± 2°), mechanical robustness (withstanding 20 loading-unloading cycles under 50% strain without structural damage), strong solar absorption, and favorable photothermal-conversion capability (rising to ~85 °C within 90 s under 1.5 sun). Owing to these advantages, PT-WA is an effective adsorbent for crude oil cleanup. In addition, a ‘self-heating crude oil collector’ was assembled for the fast adsorption and restoration of crude oil from the water surface. This solar-assisted self-heating sorbent offers a competitive platform for the cleanup and recycling of viscous crude oil spills.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Long Chen,Junmei Liang,Qicheng Zhang,Xuewen Hu,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Developing advanced noble-metal-free electrocatalysts for the hydrogen evolution reaction (HER) is still a great challenge. Herein, a novel HER catalyst with quasi zero-dimensional (0D) MoS 2 quantum dots (QDs) supported on two-dimensional (2D) Ti 3 C 2 T x MXene nanosheets is facilely synthesized. The MoS 2 QDs/Ti 3 C 2 T x nanohybrid retains the unique layer structure, and the MoS 2 QDs are in situ formed and distributed uniformly. The obtained MoS 2 QDs/Ti 3 C 2 T x catalyst exhibits superior electrocatalytic activity due to its excellent conductivity, abundant of active sites exposed and a high percentage of 1T metallic phase (∼76%) of MoS 2 QDs. Remarkably, an early HER overpotential of 220 mV at 10 mA cm −2 and a small Tafel slope of 72 mV dec −1 of MoS 2 QDs/Ti 3 C 2 T x are achieved in 0.5 M H 2 SO 4 solution. In addition, the exchange current density of MoS 2 QDs/Ti 3 C 2 T x is ∼5 times larger compared with pure MoS 2 , thus demonstrating an accelerated charge transfer during the electrocatalytic process.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yangmin Wu,Wenjie Zhao,Sheng Liu,Liping Wang
Cellulose nanofiber was grafted on Ti 3 C 2 T x (Ti 3 C 2 T x @CNF) and then Ti 3 C 2 Tx@CNF nanohybrid acted as nanofiller to endow epoxy coating superior barrier property. Electrochemical tests and corrosion products revealed that incorporation of Ti 3 C 2 T x @CNF into epoxy could significantly improve its anti-corrosion performance. Even immersion in marine alternating hydrostatic pressure (AHP) environment for 240 h, the impedance modulus of composite coating was one order of magnitude higher as compared with controlled samples. Besides, cross-sectional structure confirmed that Ti 3 C 2 T x @CNF remarkable improve the compactness of coating and thus conferring active adhesion strength with twice higher than that of pure epoxy after 240 h immersion in AHP.
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高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Hongwei Wang,Fang Wu,Zhiheng Wang,Yang Wang,Shufang Zhang,Haijun Luo,Zhiqin Zheng,Liang Fang
Chromium (VI) removal is crucial to the safety of water resources, but there is still a lack of effective and fast dislodge methods, especially the on-site rapid remediation and emergency removal technology . Herein, the monolayer (ML) Ti 3 C 2 T x nanosheets (NSs) were prepared to remove Cr (VI) from water. The solution sample of the two-dimensional (2D) Ti 3 C 2 T x NSs demonstrate ultrafast adsorption kinetics (the concentration decreasing from 300 to 3 mg L −1 in 10 min) and impressively high capacity (1483 mg g −1 ), which is several times higher than that of the most reported Cr (VI) adsorption by Ti 3 C 2 T x . The analysis of the adsorption kinetics and isotherm models indicates that the adsorption reaction is endothermic, with physical and chemical adsorption coexisting (mainly monolayer chemical adsorption). The joint study of the experimental analysis and theoretical calculation based on the density functional theory (DFT) demonstrates that the extraordinary removal performance of Cr (VI) is due to the synergetic effect of reduction reaction removal and electrostatic adsorption. It is found that the Cr (VI) is mainly reduced by the OH- terminals on Ti 3 C 2 , and the detoxified Cr (III) is anchored on the surface of Ti 3 C 2 T x through complexation reaction with O terminal. The advantages of ultrafast adsorption kinetics and extra-high adsorption capacity of the single-layered Ti 3 C 2 T x for Cr (VI) removal make it a remarkable candidate for rapid and urgent removal of Cr (VI) wastewater.
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高影响因子
Advanced Materials Technologies
·
2022
·Vol. 7
·期 12
·2200158
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IF 8.856
Weijia Liu,La Li,Chuqiao Hu,Di Chen,Guozhen Shen
The delamination of 2D Ti 3 C 2 T x MXene endows the injection of various ions and small organic molecules into its layers, thus leading to a tunable distance between layers and adjustable electrochemical properties. A suitable selection of intercalators needs to be considered according to the relevant metal-ion-based energy storage device because of the different radii of metal ions such as Li + , Na + , Mg 2+ Zn 2+ , etc. Herein, the intercalation of N , N -dimethylacetamide (DMAC), acetonitrile (ACN), dimethyl sulfoxide (DMSO), LiCl (H 2 O) into Ti 3 C 2 T x cathodes and their electrochemical performance comparisons by fabricating Zn-ion microsupercapacitors (MSCs) is reported. Studies found that an increased calculated interlayer space of 3.42, 7.47, 7.79, 8.3 Å is obtained for the H 2 O, DMSO, ACN, DMAC intercalated Ti 3 C 2 T x cathodes, and a decreased calculated binding energy of −0.03, −0.78, −1.91, and −3.06 eV is obtained for the Ti 3 C 2 T x -H 2 O, Ti 3 C 2 T x -DMSO, Ti 3 C 2 T x -ACN, and Ti 3 C 2 T x -DMAC, respectively. The highest interlayer space, lowest binding energy, and amide groups make the DMAC intercalated Ti 3 C 2 T x - based MSC exhibit volumetric capacitance of 1873 F cm −3 at a scan rate of 5 mV s −1 , much higher than 1103 F cm −3 for Ti 3 C 2 T x -H 2 O, 1313 F cm −3 for Ti 3 C 2 T x -ACN, 544 F cm −3 for Ti 3 C 2 T x -DMSO. The superior flexibility that results in invariable capacitance under 5000 bending cycles, together with the lighting test of the fabricated MSC, demonstrates its application in the wearable integrated system.
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高影响因子
CHEMICAL PHYSICS
·
2022
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IF 2.552
Ying Lv,Kai Wang,Dongyang Li,Ping Li,Xuelian Chen,Weiwei Han
MXene has gradually become hot photocatalyst in recent years due to its unique properties. This work successfully synthesized rare Ag-doped partial etched Ti 3 C 2 T x /Ti 3 AlC 2 composite nanosheets via a reduction process. The obtained ternary Ti 3 C 2 T x /Ti 3 AlC 2 @Ag can be deemed a promising photocatalyst in photodegradation fields. Ti 3 C 2 T x /Ti 3 AlC 2 @Ag-50 exhibited excellent catalytic degradation performance towards methylene blue (MB), Rhodamine B (RhB) and methylene orange (MO), with the obtained degradation efficiency of 99.7%, 98.9% and 99.3%, respectively. Furthermore, there is a synergistic effect between Ag nanoparticles and partial etched Ti 3 C 2 T x /Ti 3 AlC 2 nanosheets, as demonstrated by the transfer of photogenerated carriers and the generation of reactive oxygen species, which can improve the catalytic degradation performance of the three organic dye molecules.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Rong Luo,Zhenyu Li,Ruixiang Li,Chunli Jiang,Ruijuan Qi,Mengqin Liu,Hechun Lin,Rong Huang,Chunhua Luo,Hui Peng
It is meaningful to search high-efficient and inexpensive electrocatalysts for hydrogen evolution reaction (HER) due to the energy crisis and environmental pollution. Here, we report the preparation of ultrafine Ru nanoparticles from a hybrid of ZIF-L(Co) MOF and polydopamine coated few-layered Ti 3 C 2 T x MXene (FL-Ti 3 C 2 T x ). FL-Ti 3 C 2 T x is used as a template to grow regular leaf-shaped ZIF-L(Co) nanosheets through the reaction of Co ions anchored on the MXene surface with 2-methylimidazole. The obtained hybrid is then doped with Ru ions through ion exchange between Ru and Co ions, followed by thermal annealing at a temperature of 350 °C in an Ar atmosphere to produce ultrafine Ru nanoparticles. The obtained Ru@ZIF-L(Co)/FL-Ti 3 C 2 T x nanocomposite shows outstanding HER performance with a low overpotential of 16.2 mV at a current density of 10 mA cm −2 , a small Tafel slope of 21.0 mV dec −1 and excellent stability in 1.0 M KOH solution. This work provides a new strategy for the design and synthesis of highly efficient HER catalyst via MOFs with tunable composition and structure.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Beibei Yang,Guoli Zhang,Jiayu Dong,Shaochun Tang,Lifang Zhang,Zhengguang Wu,Duan Bin,Yaqiong Song,Hongbin Lu
A conducting and anticorrosive coating is crucial for the application of metal bipolar plates (BP) in proton exchange membrane fuel cell (PEMFC). In this work, a Ti 3 C 2 T x (T)-carbon black (C)-acrylic epoxy (AE) coating is prepared on 304 stainless steel (SS) with enhanced corrosion resistance and conductivity. The corrosion resistance of the T-C-AE coating is investigated in a 0.5 M H 2 SO 4 solution as compared to the AE, T, and T-AE coatings. The T-C-AE coated 304SS exhibits the strongest corrosion resistance with the most positive corrosion potential and the lowest corrosion current density of 0.00673 μA cm −2 in all the samples, while retaining intact and compact surface morphology with the lowest metal ion dissolution even after immersed for 720 h. The addition of Ti 3 C 2 T x and carbon black into the AE matrix greatly decreases interfacial contact resistance (ICR), and the T-C-AE coating achieves a low ICR of 15.5 mΩ cm −2 under 140 N cm −2 compaction force . The excellent anticorrosion performance is mainly attributed to the physical barrier and the cathodic protection provided by the stacked Ti 3 C 2 T x (MXene) nanosheets in the T-C-AE coating. This eco-friendly, conducting, and anticorrosive T-C-AE coating has a good application prospect on SS BP of PEMFC.
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危险品化学品经营许可证（带存储）