Engineering
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2022
·
IF 12.834
Yanqiu Zhang,Fan Yang,Hongguang Sun,Yongping Bai,Songwei Li,Lu Shao
Although nanoporous membranes are of great interest in desalination, it is still challenging to construct highly permeable nanoporous membranes with excellent rejections for an efficient desalination process. In this work, highly permeable nanoporous membranes were built from renewable resources, assisted by the versatile functions of glucose and dopamine, with coupling reactive groups via interfacial reaction with 1,3,5-benzenetricarbonyl trichloride (TMC). The small molecules (0.66 nm) of glucose, which have high hydrophilicity, can diffuse into the membrane for an effective reaction to ensure structural integration. Our novel ultrathin (∼44 nm) nanofiltration (NF) membrane exhibits ultra-high Na 2 SO 4 flux and excellent rejection of Na 2 SO 4 (66.5 L∙m −2 ∙h −1 , 97.3%) and MgSO 4 (63.0 L∙m −2 ∙h −1 , 92.1%) under a pressure of 5 bar (1 bar = 10 5 Pa) which is much superior to the performance of natural-product NF membranes. The membrane demonstrates excellent long-term stability, as well as tremendous acid-base and alkali-base stability and high anti-pollution capacity. The designed membrane materials and architecture open a new door to biopolymer-based separation membranes beyond existing membrane materials.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2014
·Vol. 161
·期 6
·H375
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IF 2.859
Zhuoyuan Yang,Yuqing Miao,Tianrui Wang,Xiaocai Liang,Mingshu Xiao,Weiwei Li,Yang Yang
The Ni ultrathin layer was obtained by the simple self-adsorption of Ni2+ on the surface of glassy carbon electrode. Through a consecutive potential scan in alkali solution, the adsorbed Ni2+ was transformed to the ultrathin layer of Ni(OH)2/NiOOH which exhibits good electrocatalysis toward the oxidation of glucose. Only a little of Ni2+ was consumed to obtain such an ultrathin layer of Ni with excellent electrochemical performance. Due to the low diffusion hindrance and the good electrocatalytic property of Ni(OH)2/NiOOH ultrathin structure, the electrode response toward glucose reaches a steady-state level within only 4 s, demonstrating a rapid and sensitive response. The calibration plot is linear over the wide concentration range of 0∼7 mM with a slope of 1.01 μA/mM (sensitivity) and a correlation coefficient of 0.9996. The detection limit of the electrode was found to be 10.9 μM at a signal-to-noise ratio of 3. The adsorption method is very simple and the ultrathin layer of Ni was formed in a controllable manner with the size lower than nanoscale, which will find the potential applications in nanofabrication for the nanodevices of fuel cell or electrochemical sensor in the future.
研究领域:
电化学
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材料科学
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生物传感器
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Huifang Wang,Jun Zhang,Qichong Zhang,Hao Wu,Xiaohong Xu
The p-n heterojunctions with the built-in electric field are often adopted to promote the separation of photoexcited electron-hole pairs and enhance the photoelectrochemical (PEC) performance. However, the interface states often affect the band alignment of ZnO/Cu 2 O heterointerface and cause the decline of PEC performance. In this study, the ultrathin insulating Al 2 O 3 layer was introduced to modify the interface between n-type ZnO nanorod arrays (NRA) and p-type Cu 2 O. Compared to that of ZnO NRA/Cu 2 O, the photocurrent density is significantly improved and onset potential shifts negatively for ZnO NRA-Al 2 O 3 /Cu 2 O. The Al 2 O 3 ultrathin layer is deemed to suppress the photoexcited carriers trapped by the heavy interface defect states via improving the interface quality and block the recombination between electrons in the conduction band of ZnO NRA and holes in the valence band of Cu 2 O. This work broadens the interface modification method of p-n heterojunction and its results are favorable for photovoltaic devices, photodetection and PEC water splitting applications.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Bingyu Tian,Fan Xu,Kun Cui,Haolin Li,Rui Dong,Mingjin Fan
The interlayer coupling interaction of bentonite (BT) material behave superior performance and unique functionality by introducing guest functional molecules. As intercalation agents, ionic liquids (ILs) with high polarity and molecular structure regulation can provide excellent lubricity and multifunctionality . Herein, the novel IL-modified intercalation bentonite (IL-BT) were designed and prepared by functionalization of the imidazolium-based and phosphorus-based ILs. And ultra-thin lamellar structure morphology is obtained, which contributes to the enhanced dispersion and stability in base oils. For IL -BT, their strong interlayer slip can significantly improve lubrication properties. Besides, FIB-TEM results show that unique tribofilm is detected at the sliding asperity. The excellent tribological properties are attributed to the synergistic lubricity of interlayer slip, tribo-chemical reaction and repair effect during friction.
研究领域:
材料科学
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摩擦学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
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2020
·
IF 4.915
Suli Chen,Fan Feng,Zi-Feng Ma
Nitrogen-doped porous ultrathin layered carbon (LC) was prepared via annealing alkaline lignin with melamine and urea. As the anode material of sodium-ion batteries, the as-prepared LC shows high reversible capacity, outstanding rate performance and excellent cycling performance. In particular, the ultrathin graphitic carbon with large surface area and pore volume provide abundant sodium storage active sites, delivering a higher initial capacity of 320.5 mAh g −1 in the voltage range of 0.01–3 V at a current density of 0.1 C (1C = 30 mA g −1 ). Besides, the structure defects resulted from the doping of N also benefits to its high capacity. Capacitive and diffusion contribution calculation and EIS analysis proved the improved the Na + -ion storage kinetics due to LC's unique porous ultrathin structure, resulting in outstanding rate performance. LC delivers a high capacity of 138.7 mAh g −1 at 5 C. Besides, LC's porous ultrathin structure also guarantees its stable cycling performance. Even at a high current density of 5 C, there's no obvious capacity decay after 4000 cycles. This work presents an alternative approach for the synthesis of high-rate carbonaceous anode materials for sodium-ion batteries from low cost and sustainable feedstock .
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2021
·Vol. 75
·期 12
·6477-6485
·
IF 2.097
Ren Xiaohui,Feng Xiaoxiang,Li Xuandong,Li Xin
A large number of pesticides left in the crops and water affect the environment and human health. The combination of surface-enhanced Raman scattering (SERS) technology and molecular imprinting technology (MIT) was presented to apply to the detection of target molecules in water. However, the thickness of the imprinted layer and the inhomogeneity of the shell package have a great influence on SERS detection. To overcome the above problems, a new method is proposed to control the imprinted layer within 5 nm by taking the large-scale Ag as the core, reducing the amount of reagent, increase the oscillation time of polymerization, and so on. The obtained Ag@molecular imprinted polymers (Ag@MIPs) were applied for rapid detection of carbendazim. Besides, the SERS intensity of Ag@MIPs for carbendazim was higher than that of Ag, exhibiting limit detection as low as 1 × 10 −9 M. Also, Ag@MIPs is used as SERS substrate achieved high selectively and satisfactory reusability. Based on the above, the experiment results proved that the Ag@MIPs with a thin imprinted layer provided a reliable approach for carbendazim detection.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Lele Qiu,Yulin Yang,Guohua Dong,Debin Xia,Mengru Li,Xiao Fan,Ruiqing Fan
As for the solution-processed MAPbI 3 film, the pinholes and gaps are an inevitable and undesirable phenomenon, which can usually lead to serious interface charge recombination due to the penetration of hole transport materials in perovskite solar cells (PSCs). Herein, a hydrophobic β-NaYF 4 :Yb,Er up-conversion ultrathin layer with particle size ca. 6 nm was first applied to modify the MAPbI 3 film for optimizing the surface of perovskite film. Thereby, the corresponding PSCs yield a significantly enhanced power conversion efficiency of 15.17% compared with that (13.32%) of the pristine PSCs. Furthermore, the PSCs also have a good stability in air atmosphere (relative humidity ≤45%) because of the introduction of this hydrophobic material. After a series of detailed investigations and comparison, it can be easily concluded that the filled pinholes and gaps in perovskite films via β-NaYF 4 :Yb,Er nanoparticles is the main reason for the performance enhancement of the β-NaYF 4 :Yb,Er based PSCs, which can result in an enhanced hole extraction efficiency and reduced interface charge recombination. As a conclusion, it is a feasible and effective approach for improving the photovoltaic performance of PSCs by filling up the pinholes and gaps in perovskite films with up-conversion ultrathin layers.
研究领域:
材料科学
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能源科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lei Zhang,Bingfeng Chen,Ti Zhou,Xiaomeng Cheng,Minghua Dong,Ye Liu,Huizhen Liu,Qingling Xu,Buxing Han
The conversion of carbohydrates into 5-hydroxymethylfurfural (HMF), a vital and valuable platform chemical, is sought after in industrial applications but poses significant challenges. In this research, we engineered an ultra-thin layer HTaMoO 6 catalyst using ball-milling/liquid-exfoliation technique, demonstrating its efficiency in catalyzing the transformation of carbohydrates to HMF. In contrast to the conventional method utilizing tetra(n-butylammonium) hydroxide as the intercalation agent, the ball-milling/liquid-exfoliation technique not only reduces catalyst preparation time (within 12 h) but also enhances the efficient intercalation, leading to the formation of an ultra-thin layer structure. The resulting catalyst exhibits high total acidity, a favorable Brønsted/Lewis acid ratio, and improved accessibility of active sites due to the thin layer structure post-exfoliation. Compared with bulk LiTaMoO 6 , the ultrathin layer HTaMoO 6 catalyst enables complete fructose dehydration with an HMF yield reaching 89.1 % under moderate reaction conditions (120 °C, 1 h) and 47.2 % yield of HMF is obtained from sucrose at 130 °C. This work provides a new method to fabricate the solid acid for the transformation of carbohydrates.
研究领域:
催化
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）