INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Songlong Jiao,Lei Liu
Photocatalytic degradation is a potential method to solve pollution caused by waste lubricating oils. In this work, vertically aligned MoS2 layers are grown on Ti3C2 via hydrothermal method and the influence of the friction time on its photocatalytic performance was studied. The results show that friction benefits the improvement of the efficiency of catalytic degradation because of the change of photocatalysts’ morphology caused by the shear force and pressure from rubbing pair, which generates more active sites. MoS2@Ti3C2 nanohybrid with friction time of 60 min has the best photocatalytic performance in terms of waste oil (liquid paraffin) and methyl orange removal of 80.5 and 98%, respectively. The Schottky junction between Ti3C2 and MoS2 and the heterojunction between MoS2 and TiO2 can prolong the recombination time of electron–hole pairs and widen the absorption range of the visible light, which play a key role in the excellent photocatalytic activity of the MoS2@Ti3C2 nanohybrid.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Jun Yang,Quanxi Zhu,Zhigang Xie,Yajing Wang,Jiankang Wang,Yuan Peng,Yingying Fang,Lihua Deng,Taiping Xie,Longjun Xu
It is very significant to boost separation efficiency of photoinduced charge carriers and to extend absorption light range from ultraviolet light into visible light region for photocatalysts . Here, Ti 3 C 2 incorporation boosted the separation efficiency of photogenerated carriers of MoS 2 , extended absorption light region, heightened the absorption intensity of visible light, and enhanced photocatalytic stability. The rhodamine B (RhB) solution could be completely degraded using MoS 2 /Ti 3 C 2 under visible light after only 30 min. The comparing evaluation of photocatalytic activity signified that the reaction kinetics of RhB photodegradation over MoS 2 /Ti 3 C 2 increased 1.4 and 3 times under UV light and visible light irradiation , respectively. Experimental tests and density functional theory (DFT) calculation confirmed the formation of MoS 2 /Ti 3 C 2 Schottky junction, in which Ti 3 C 2 served as electron sink. The photogenerated electrons in MoS 2 easily transferred to Ti 3 C 2 phase due to driving force of built in electric field, which realized efficient separation of photocarriers and prolonged the life span of photoproduced holes. We sincerely hoped this catalyst could be widely applied in wastewater treatment field.
研究领域:
材料科学
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环境科学
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理论计算
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Feier Niu,Yueyuan Mao,Nana Wang,Zhenying Feng,Junming Chen,Longqiang Ye,Shaoqing Zhang,Zhongchao Bai,Shixue Dou
Two-dimensional (2D) layered materials have promising prospects for Zn-storage due to their flexible and adjustable interlayer architecture. The strong electrostatic interaction and high diffusion energy barrier, however, lead to slow diffusion kinetics of Zn-ions between the 2D interfaces, limiting its widespread application. Herein, Ti 3 C 2 MXene is introduced into the MoS 2 interlayer by the “pillar effect” to assemble a layer-by-layer inter-embedded structure (L-MoS 2 /Ti 3 C 2 ), which provides sufficient diffusion channels for Zn-ions. DFT computations and GITT confirm that the L-MoS 2 /Ti 3 C 2 exhibits superior Zn-ions migration kinetics. Therefore, L-MoS 2 /Ti 3 C 2 shows excellent long-term cycling stability (75.6% capacity retention after 7000 cycles at 15 A g -1 ) and glorious high-rate capability (107 mAh g -1 at 20 A g -1 ). In addition, the practical application of this material is demonstrated by evaluating the performance of L-MoS 2 /Ti 3 C 2 in flexible quasi-solid-state aqueous zinc ion batteries under various extreme bending conditions, which exhibits good stability under 180° during the 4000 cycles with a capacity retention of 80.5% at 2.0 A g -1 .
研究领域:
材料科学
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电化学
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纳米能源
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储能技术
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先进电池
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Xiaoyue Chen,Songge Zhang,Xiu Qian,Zhangqian Liang,Yanjun Xue,Xiaoli Zhang,Jian Tian,Ye Han,Minhua Shao
Herein, we assemble semi-metallic 1T′ phase MoS 2 on the surface Ti 3 C 2 MXene (1T′-MoS 2 /Ti 3 C 2 composite) by one-step hydrothermal method for nitrogen fixation. 1T′-MoS 2 /Ti 3 C 2 composites present a high ammonia yield rate of 31.96 µg h −1 mg −1 cat. at − 0.95 V vs. RHE and a Faradaic efficiency (FE) of 30.75% at − 0.7 V, which is much better than pure 1T′-MoS 2 and pure Ti 3 C 2 MXenes alone. Furthermore, the 1T′-MoS 2 /Ti 3 C 2 composites exhibit good selectivity and stability with no significant decrease in ammonia yield rate and FE. Density functional theory (DFT) calculations reveal that 1T′-MoS 2 /Ti 3 C 2 composite makes the activation and further reduction of *N 2 more thermodynamically favorable than pure 1T′-MoS 2 . 1 5 N isotopic labeling experiment confirms that nitrogen in produced ammonia originates from N 2 in the electrolyte.
研究领域:
材料科学
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电催化
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理论计算
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
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2022
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IF 4.654
Bingjie Wen,Nizao Kong,Min Huang,Liqin Fu,Dingbang Yan,Yexin Tian,Jinshui Liu,Ruixuan Tan,Fei Han
Despite the outstanding theoretical capacities of two-dimensional (2D) molybdenum sulfide (MoS2) with low costs, its low conductivity and easy agglomeration greatly impede the business application as anode materials. The heterostructures between 2D MoS2 and Ti3C2 MXene are able to combine the collective superiorities of MoS2 and Ti3C2, thus greatly ameliorating the electrical conductivity and rate capacity through synergistic effects. Herein, we design a simple intercalation–sulfidation strategy for the construction of the TH MoS2/Ti3C2 heterostructures with a compact stacking lamellar structure and investigate the electrochemical sodium storage properties of the composite. In the architecture, fallen leaf-like MoS2 nanosheets with a mixed-phase crystal containing 1T and 2H phases grow tightly on the surface and interlayer of Ti3C2 matrixes. The expanded layer spacing of Ti3C2 as a result of MoS2 insertion can greatly accelerate electronic/sodium ion transport. Meanwhile, 2D Ti3C2 can serve as a strong mechanical support for the composite electrode to provide a buffer space for volume expansion and avoid structural collapse during cycles. Benefiting from these structural advantages, the TH MoS2/Ti3C2 anode reveals higher sodium storage capacity of 743.6 mAh g–1 than bare MoS2 (579.4 mAh g–1) at 0.2 A g–1. Furthermore, the anode exhibits significantly improved battery rate performance with a high sodium storage capacity of 653.3, 539.1, 512.1, 488.7, 439.3, and 586.7 mAh g–1 at 0.2, 0.5, 1, 2, 5, and 0.2 A g–1. Our study provides a unique synthesis route to construct layered heterostructure composites by artificial stacking of different types of 2D materials, which are considered as highly promising electrode materials for sodium-ion batteries (SIBs).
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
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无机化学
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固态物理
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Fei Long,Qixiang Zhang,Junjie Shi,Li Wen,Yonghui Wu,Ziqi Ren,Zunyu Liu,Yixin Hou,Ke Mao,Ke Niu,Nishuang Liu,Zhi Zhang,Luying Li,Jun Su,Fei Long,Yihua Gao
Aqueous zinc-ion batteries (AZIBs) are a green, low-cost and high-safety energy storage technology. Although MoS 2 is a promising electrode material, low conductivity and poor stability still limit their application in AZIBs. Constructing conductive heterostructures is an effective strategy to overcome these problems. Herein, metallic 1 T-MoS 2 nanosheets are innovatively combined with conductive Ti 3 C 2 MXene, resulting in enlarged 1 T-MoS 2 interlayers (from 9.5 to 9.9 Å) and enhanced hydrophilicity. This novel 1 T-MoS 2 /Ti 3 C 2 MXene heterostructure exhibits exceptional high-rate capability (284.3 mAh/g at 0.10 A/g with 105.2 mAh/g at 10.00 A/g) and long-term cycling stability (93.2 % capacity retention after 3000 cycles). High capacity comes from the expanded ion storage space caused by the extended layer spacing of the metallic 1 T-MoS 2 . Outstanding rate capability thanks to ultrafast electrons and ions transport from Ti 3 C 2 MXene. Prominent long-term cycling stability is attributed to the efficient synergistic effect of 1 T-MoS 2 and Ti 3 C 2 MXene in the 3D interconnected networks. As a proof of concept, the wearable quasi-solid-state Zn-ion battery employing the 1 T-MoS 2 /Ti 3 C 2 MXene cathode exhibits stable electrochemical performance under different bending conditions. This work explores a new route to design high-performance layered cathode materials for AZIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
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