SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2022
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IF 7.305
Yan Zhou,Xiaojian Wang,Dekun Sheng,Xiangdong Liu,Yuming Yang
Light-driven PEG/Ti 3 C 2 T x form-stable phase change films for energy storage crosslinked by Co 2+ were prepared through facile solution mixing. It is the strong interactions among PEG , Ti 3 C 2 T x and Co 2+ that endowed the system with excellent form-stability with only 5.0 wt% supporting. And the latent heat of samples was 142.1 J/g with light-thermal conversion and storage efficiency higher than 86.9%. Meanwhile, the samples possessed improved thermal stability and favorable thermal reliability. The fabricated films with comprehensive properties shows great perspective to be used in energy storage devices.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
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IF 4.527
Yong-Sheng Fang,Peng He,Yong-Zhu Cai,Wen-Qiang Cao,Mao-Sheng Cao
Ti 3 C 2 T x exhibits excellent electromagnetic (EM) shielding and electrochemical properties . However, the inherent re-stacking tendency and easy oxidation of Ti 3 C 2 T x limit its further application. In this study, a multi-walled carbon nanotube/polyaniline composite (CNT/PANI, denoted as C –P) was introduced into Ti 3 C 2 T x nanosheets to obtain a Ti 3 C 2 T x –CNT/PANI composite (T@CP). Owing to the integrated effects of Ti 3 C 2 T x and C –P, the contribution of absorption was significantly improved, which finally enhanced the EM shielding performance of T@CP. The highest total EM shielding effectiveness ( SE T ) was close to 50 dB (49.8 dB), which was substantially higher than that of pure Ti 3 C 2 T x (45.3 dB). Moreover, T@CP demonstrated outstanding supercapacitive performance. The specific capacitance of T@CP (2134.5 mF/cm 2 at 2 mV/s) was considerably higher than that of pure Ti 3 C 2 T x (414.3 mF/cm 2 at 2 mV/s). These findings provide a new route for the development of high-efficiency Ti 3 C 2 T x -based bifunctional EM shielding and electrochemical materials.
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高影响因子
CERAMICS INTERNATIONAL
·
2020
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IF 3.83
Bingbing Chen,Aihu Feng,Kun Liu,Jiao Wu,Yun Yu,Lixin Song
Ti 3 C 2 T x is a promising intercalation-type electrode material for capacitive deionization (CDI). However, Ti 3 C 2 T x , obtained from traditional synthesized Ti 3 AlC 2 , is with large particle size and undersized interlayer space, which can easily lead to the longer ion diffusion path, fewer adsorption sites, and higher ion diffusion barrier in CDI process. In this work, subsize and Na + intercalated Ti 3 C 2 T x (Na + -Ti 3 C 2 T x -MS) was prepared by HF etching KCl-assisted molten-salt synthesized Ti 3 AlC 2 and following NaOH treatment. The Na + -Ti 3 C 2 T x -MS achieves a high electrosorption capacity of 14.8 mg/g and a high charge efficiency of 0.81 at the applied voltage of 1.2 V in 100 mg/L NaCl solution. Besides, the stable desalination performance of Na + -Ti 3 C 2 T x -MS has been confirmed. The superior performance of Na + -Ti 3 C 2 T x -MS can be attributed to the subsize particle and larger interlayer space. Both two factors can effectively increase ions adsorption sites, shorten diffusion path lengths, and reduce diffusion barriers in the CDI process.
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高影响因子
CERAMICS INTERNATIONAL
·
2020
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IF 3.83
Wei Wan,Meizhen Tao,Hailin Cao,Yuqing Zhao,Junrong Luo,Jian Yang,Tai Qiu
Exploring flexible dielectrics with high dielectric constant and low loss is pertinent for many applications in electronic devices. In the present work, a non-ferroelectric polymer, polyvinyl alcohol (PVA), was used to fabricate homogeneous dielectric composite films with a relatively high dielectric constant and a low dielectric loss by using 2D nano sheets (Ti 3 C 2 T x MXene) as the filler. To limit dielectric loss, SiO 2 was coated onto the surface of MXene to provide interfacial barrier effect and suppress dielectric loss. MXene@SiO 2 /PVA composite films showed lower dielectric losses at low frequencies (from 20 Hz to ~ 10 kHz) compared with MXene/PVA composite films. MXene@SiO 2 /PVA composite films with 2.5 wt% MXene loading and 5 wt% (with respect to MXene content) SiO 2 coating had a dielectric constant of 27.2 (a 292.5% rise compared to neat PVA film) and a dielectric loss of only 0.057 (a 259.6% reduction compared to MXene/PVA composite film) at 100 Hz and room temperature (RT). In addition, this SiO 2 -coated composite film had stable dielectric properties (dielectric constant and loss change from 27.2 to 29.3 and 0.057 to 0.104, respectively) in the temperature range of RT to 60 °C. This work provides a promising way to fabricate PVA-based dielectric composites with excellent dielectric properties for practical applications in electronics.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Yapeng Tian,Chenhui Yang,Yi Tang,Yangyang Luo,Xiaojie Lou,Wenxiu Que
Supercapacitors with an advanced high volumetric energy density require a match of both electrodes materials and suitable electrolyte. Here, aqueous asymmetric supercapacitors are designed by employing layered Ti 3 C 2 T x as negative electrodes and highly compact activated carbon (AC) as positive electrodes. Ti 3 C 2 T x //AC asymmetric supercapacitors (Ti 3 C 2 T x //AC ASCs) with 1.7 V voltage window are designed by regulating the mass ratio of both electrodes, which results from the shift of the open circuit potential with different applied voltages. Then, dual-ion hybrid supercapacitors (Ti 3 C 2 T x //AC-KBr HSCs) are also constructed by introducing redox active (KBr) into traditional electrolyte (H 2 SO 4 ) for Ti 3 C 2 T x //AC ASCs to achieve a high volumetric energy density, in which fast hydronium ion intercalated pseudocapacitance happens at the Ti 3 C 2 T x negative electrode, while redox reaction of Br − /Br 3 − within the highly compact AC happens at the positive electrode. As a result, the Ti 3 C 2 T x //AC-KBr HSC achieves a high volumetric capacitance of 250 F cm −3 at 2 mV s −1 , a volumetric energy density of as high as 102.8 Wh L −1 at 424 W L −1 and an outstanding cycling stability with 122% capacitance retention after 6000 cycles. Furthermore, the self-discharge performance for the Ti 3 C 2 T x //AC-KBr HSC is obviously improved, which is mainly ascribed to the adsorption of oxidized species at the AC surface.
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2020
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IF 2.904
Jialong An,Yanan Ma,Mingquan He,Jinfeng Yan,Chuankun Zhang,Xingxing Li,Peizhi Shen,Shijun Luo,Yihua Gao
Development of low-cost, efficient, flexible and highly sensitive pressure sensors that can perceive and respond to environmental stimuli have become indispensable for wearable electronics. Herein, the Ti 3 C 2 T x -textile based pressure sensor was successfully fabricated with the help of common fabric substrates by using simple and effective dipping-drying method. The Ti 3 C 2 T x Nanosheets prepared by wet-chemical solution display excellent hydrophilicity, high specific surface area, metallic conductivity and controllable surface groups properties, which are extremely suitable in construction of low-cost and high-performance textile-based pressure sensors. And the Ti 3 C 2 T x -textile based pressure sensor achieves high sensitivity (19.78 kPa −1 ), low detection limit (219 mN), fast response (∼149 ms) and well stability (more than 7000). With these merits, the Ti 3 C 2 T x -textile based sensor is demonstrated to be able to recognize the human physiological signals, such as finger bending, tapping, hand movements and so on. Furthermore, the textile sensor also can be capable to measure pressure distribution and distinguish the subtle strain, which demonstrates great potential in both industrial and biomedical applications.
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高影响因子
Carbohydrate Polymer Technologies and Applications
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2022
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IF 0
Kun Hou,Hu Zhou,Ke Zhu,Chunye Xie,Simin Liu,Yingxiang He,Xingyi Zhu,Ming Wu,Tiefan Huang
Oily wastewater seriously endangers human health. Ti 3 C 2 T x MXene has attracted extensive attention as a building block for separating membranes because of its unique two-dimensional structure and excellent hydrophilicity. In this study, we constructed a superwetting Ti 3 C 2 T x MXene membrane intercalated with sodium alginate. The hydrophilic sodium alginate not only enlarged the nanochannel of the MXene membrane but also decorated the membrane surface and endowed the membrane with excellent surface superwetting properties. The underwater oil contact angle (OCA) was about 151°, indicating an extremely low adhesion between oil and membrane surface. The membrane could also separate a series of oil-water emulsions with high separation efficiency and flux. Due to its excellent underwater superoleophobicity, the membrane demonstrated outstanding antifouling property. Excellent separation performance was maintained even after separation cycles. This work provides insights into the rational use of MXene-based membranes design and demonstrates its potential in the field of membrane separation.
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DOI
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Mingmei Ding,Hang Xu,Anqi Wang,Chen Yao,Ao Wang,Li Gao
Advanced oxidation processes (AOPs) are efficient means for the water recovery by removing the organic pollutants in wastewater. In this study, γFe 2 O 3 @Ti 3 C 2 T x nanocomposite was synthesized and utilized for the removal of micropollutants (i.e. ibuprofen, IBP) through peroxymonosulfate (PMS) activation. The characterization results suggest that γFe 2 O 3 nanoparticles were uniformly decorated on the Ti 3 C 2 T x MXene nanosheets surface. γFe 2 O 3 @Ti 3 C 2 T x nanocomposite exhibited excellent catalytic ability and stability for PMS activation to generate reactive species for the elimination of IBP. The influence of reaction parameters, including catalyst, IBP and PMS concentration as well as initial pH value, were systematacially studied. The synergistic effect of the binary active sites (Fe and Ti) facilitated the cleavage of O O bond in PMS, thus contributing to the production of abundant sulfate radicals (SO 4 ●- ) and hydroxyl radicals ( ● OH) for the degradation of IBP. This study may shed light on the applications of heterogeneous catalyst for the degradation of organic pollutants through PMS activation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Hui Cai,Meng Rong,Qiyu Meng,Zhiqian Liu,Yue Zhao,Congmei Chen,Liangrong Yang
Recovering rare earth elements (REEs) from low-concentration REE-bearing waste streams has been deemed as a sustainable approach to diversity REE supply and reduce environmental burden. However, highly selective separation of trivalent Fe 3+ and Al 3+ impurities during low-concentration REE processing still remains a critical challenge. In this study, two-dimensional multilayered MXene adsorbents TCFs were successfully prepared and utilized for Nd 3+ adsorption via selective etching of Al element in Ti 3 AlC 2 . It was found that LiF/HCl-etched TCF-2 can simultaneously realize effective Al etching, interlayer spacing expansion and in-situ Li + intercalation. The intercalated Li + amount was up to 4.44 wt% (6.40 mmol/g). Compared with HF-etched TCF-1, TCF-2 demonstrated boosted adsorption kinetics (2 h), large adsorption capacity (517.79 mg/g), impressively high selectivity (Nd 3+ /Fe 3+ SF = 221, Nd 3+ /Ca 2+ SF = 858, Nd 3+ /Mg 2+ SF = 3545), and broad working pH range (2–7). Various experimental characterizations reveal that selective Nd 3+ recovery is owing to the ion-exchange and surface complexation induced by interlayer Ti-O/Ti-OH of TCF-2. Specifically, the extended X-ray sorption fine structure (EXAFS) results, in combination with density functional theory (DFT) calculations, further confirm the Nd 3+ is selectively adsorbed by forming surfaced complexes structure in the interlayer. And this is also evidenced by the decrease of Nd-O distances and high coordination number. The present results illustrate that alkaline metal ion-intercalated MXene could serve as a promising candidate to efficiently remove trivalent Fe 3+ impurities for REEs recovery.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Linzhe Xu,Yingbo Chen,Yuanyuan Zhang,Meng Wang,Siyu Wei
Uranium is the main element of nuclear energy production, so the current global energy scarcity can be solved by uranium enrichment. The total amount of uranium in the ocean is huge, but how to extract uranium from the ocean efficiently and conveniently has become a hot issue nowadays. Polydopamine (PDA) from the self-polymerization of the mussel substance dopamine (DA) improved the adhesion of Ti 3 C 2 T x (MXene) nanosheets to amidoxime polyacrylonitrile (PAO) support membrane to form amidoxime polyacrylonitrile composite membrane loaded with MXene nanosheets for uranium capture (PDA@M/PAO). The obtained maximum uranium adsorption capacity of PDA@M/PAO composite membrane can reach up to 14.85 g/m 2 (499.9 mg/g), which was significantly higher than that of single PAO membrane. Kinetic fitting indicated that the adsorption was chemical adsorption, and isothermal model indicated that the adsorption was consistent with Langmuir adsorption, which was monolayer adsorption. After eight adsorption–desorption cycles, the adsorbent still retained 83 % of the elution rate, indicating that the adsorbent had great stability and recyclability. Due to its high adsorption capacity and excellent cycling stability, PDA@M/PAO composite membrane will provide a new strategy for uranium enrichment.
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高影响因子
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2023
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IF 2.9
Feng Qing,Yang Jing,Dou Mingyuan,Zou Shuai,Wei Lixia,Huang Fuchuan
To achieve the goal of developing high-performance lubricant additives for industrial lubrication. Herein, tetradecylphosphonic acid (TDPA) modified Ti 3 C 2 T X and graphene oxide (GO) were used as nanohybrid lubricant additives in the polyalphaolefins base oil (PAO6). The high-speed reciprocating friction and wear test shows that TDPA–Ti 3 C 2 /GO is an efficient friction-reduction and antiwear additive. The base oil mixed with 0.05 wt%TDPA–Ti 3 C 2 /0.05 wt% GO exhibits the lowest coefficient of friction (COF) and wear rate with the value of 0.09 and 4.4 × 10 –6 mm 3 /Nm, decreased by 54.5 and 90.0% compared with pure PAO6 oil, respectively. Detailed characterization analysis shows that the tribological film of the modified TDPA–Ti 3 C 2 /GO nanohybrids oil-lubricated surface was mainly composed of PAO6, TDPA, GO, and iron oxide. This indicates that the friction-reduction and antiwear mechanism of TDPA–Ti 3 C 2 /GO in base oil lies in the adsorption of the two nanomaterials and the formation of a self-lubricating film on the rubbing interface. This study provides a new approach to the design of nanohybrid lubricant additives and creates new prospects for the application of nanomaterials in tribology.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
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IF 9.9
Fan Zhao,Yaning Zhang,Siqi Gong,Huiting Xu,Junjie Qi,Honghai Wang,Chunli Li,Wenchao Peng,Jiapeng Liu
Capacitive deionization (CDI) is perceived as a promising technology for freshwater production owing to its environmentally friendly nature and low energy consumption. To date, the development of high-performance electrode materials represents the foremost challenge for CDI technology. In this work, the porous bismuthene/MXene (P-Bi-ene/MXene) heterostructure was synthesized using a simple interfacial self-assembly method with two-dimensional (2D) bismuthene and Ti 3 C 2 T x MXene . Within the P-Bi-ene/MXene heterostructure, the porous structure can increase the active site and facilitate ion transport. Simultaneously, MXene effectively enhances the conductivity of the heterostructure, resulting in accelerating electron transport. Due to these attributes, the P-Bi-ene/MXene heterostructure demonstrates high desalination capacity (90.0 mg/g), fast desalination rate, and good cycling performance. The simple self-assembly strategy between 2D/2D materials described herein may offer inspirations for the synthesis of innovative electrode materials with high performance.
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DOI
PubMed
高影响因子
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