LANGMUIR
·
2021
·
IF 3.882
Zhenyu Wang,Xiang Mao,Hua Wang,Shenggeng Wang,Zengtao Yang
This work reports a new method of fabricating lipid nanotubules using ultrasonic Stokes drag force in theory and experiment. Ultrasonic Stokes drag force generated using a planar piezoelectric ultrasonic transducer in a remotely controllable way is introduced. When ultrasonic Stokes drag force is applied on lipid vesicles, the lipid nanotubules attached can be dragged out from the lipid film. In order to demonstrate the formation mechanism of the lipid nanotubules produced by ultrasonic drag force clearly, a theoretical kinetic model is developed. In the experiments, the lipid nanotubules can be rapidly and efficiently fabricated using this ultrasonic transducer both in deionized water and NaCl solutions with different concentrations. The stretching speed of the lipid nanotubules can reach 33 μm/s, approximately 10 times faster than that of the existing methods. The formed lipid nanotubules have a diameter of 600 ± 100 nm (>80%). The length can reach the millimeter level. This work provided a remotely controllable, highly efficient, high-velocity, and solution environment-independent approach for fabricating lipid nanotubules.
研究领域:
生物物理学
·
纳米技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Yang-Yang Hao,Ming-Xiu Xiao,Guo-Cui Mao,Jin-Peng Wang,Zhan-Kuo Guo,Bao-Xia Dong,Yun-Lei Teng
Capturing CO 2 using clamshell/eggshell-derived CaO adsorbent can not only reduce carbon emissions but also alleviate the impact of trash on the environment. However, organic acid was usually used, high-temperature calcination was often performed, and CO 2 was inevitably released during preparing CaO adsorbents from shell wastes. In this work, CaO-based CO 2 adsorbent was greenly prepared by calcium-induced hydrogenation of clamshell and eggshell wastes in one pot at room/moderate temperature. CO 2 adsorption experiments were performed in a thermogravimetric analyzer (TGA). The adsorption performance of the adsorbents obtained from the mechanochemical reaction (BM-C/E-CaO) was superior to that of the adsorbents obtained from the thermochemical reaction (Cal-C/E-CaO). The CO 2 adsorption capacity of BM-C-CaO at 650 °C is up to 36.82 wt%, but the adsorption decay rate of the sample after 20 carbonation/calcination cycles is only 30.17%. This study offers an alternative energy-saving method for greenly preparing CaO-based adsorbent from shell wastes.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Tingting Zhong,Lei Shi,Huiying Hao,Jingjing Dong,Kunpeng Tang,Xiang Xu,Shindume Lomboleni Hamukwaya,Hao Liu,Jie Xing
In order to further promote the commercial application of perovskite solar cells (PSCs), it is particularly important to fabricate devices in the ambient air condition. Herein, we explore a simple method to reproduce high-efficiency and stable PSCs using the one-step anti-solvent deposition conducted in the full ambient air. NH4Ac (ammonium acetate), which is green and environmentally friendly, is first introduced into an anti-solvent (ethyl acetate) to enhance the photovoltaic performance and stability of devices. NH4+ causes the intermediate phase to undergo a process of cation exchange, thereby delaying crystallization. Ac– makes the additive and A-site cation form hydrogen bonds, which in turn makes the intermediate phase more stable. The dual effects of NH4+ and Ac– delay the crystallization of the perovskite film, reduce the density of defect states, and decrease the non-radiative recombination of carriers. By optimizing the concentration of NH4Ac, a champion power conversion efficiency (PCE) of 20.41% and an average PCE of 19.46 ± 0.64% are achieved, which is currently one of the highest efficiencies in fabricating PSCs under the full ambient air condition. Furthermore, the corresponding PSCs without encapsulation can maintain 82% of its initial PCE when stored in full ambient air condition (30–40% RH) for 30 days.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-8
·
IF 16.6
Wang Xiaohan,Wang Hao,Ma Liang,Zhang Labao,Yang Zhuolin,Dong Daxing,Chen Xi,Li Haochen,Guan Yanqiu,Zhang Biao,Chen Qi,Shi Lili,Li Hui,Qin Zhi,Tu Xuecou,Zhang Lijian,Jia Xiaoqing,Chen Jian,Kang Lin,Wu Peiheng
Superconducting nanocircuits, which are usually fabricated from superconductor films, are the core of superconducting electronic devices. While emerging transition-metal dichalcogenide superconductors (TMDSCs) with exotic properties show promise for exploiting new superconducting mechanisms and applications, their environmental instability leads to a substantial challenge for the nondestructive preparation of TMDSC nanocircuits. Here, we report a universal strategy to fabricate TMDSC nanopatterns via a topotactic conversion method using prepatterned metals as precursors. Typically, robust NbSe 2 meandering nanowires can be controllably manufactured on a wafer scale, by which a superconducting nanowire circuit is principally demonstrated toward potential single photon detection. Moreover, versatile superconducting nanocircuits, e.g ., periodical circle/triangle hole arrays and spiral nanowires, can be prepared with selected TMD materials (NbS 2 , TiSe 2 , or MoTe 2 ). This work provides a generic approach for fabricating nondestructive TMDSC nanocircuits with precise control, which paves the way for the application of TMDSCs in future electronics.
研究领域:
材料科学
·
纳米技术
·
超导性
·
光子学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Rong Liu,Yan Gao
Preparing metal-organic frameworks (MOFs) film in situ on the surface of the Ti-6Al-4V (TC4) titanium alloy is challenging owing to the dense and stable surface TiO 2 passive film. In this study, titanium-doped zirconium-based MOFs (Zr(Ti)-MOFs) film was constructed in situ on the TC4 alloy in one step at a low temperature and atmospheric pressure, with ZrCl 4 as the source of Zr metal ions. ZrCl 4 attacked and dissolved the TiO 2 film to form Zr-O-Ti bonds on the surface of TC4 to provide nucleation sites for further reactions. At the same time, Zr 4+ and dissolved Ti 4+ combined in solution to form Ti containing Zr-O cluster nodes, which aggregated and grafted to the Zr-O-Ti bonds on the substrate surface, and reacted with organic ligands (terephthalic acid) to form Zr(Ti)-MOFs film. The Ti 4+ dissolved from the TC4 participate in the Zr-MOFs formation, thereby changing the high temperature and high-pressure conditions required for the traditional preparation of Zr-MOFs (UiO-66). The in situ preparation of Zr(Ti)-MOFs on TC4 was achieved at 80°C under atmospheric pressure conditions. This study elucidated the growth mechanism of Zr(Ti)-MOFs on the TC4 surface, providing a reference for the design and in-situ preparation of multifunctional MOFs on the TC4 titanium alloy.
研究领域:
材料科学
·
表面工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2021
·Vol. 10
·期 10
·2339
·
IF 4.35
Zhichao Yang,Chaoyi Shen,Yucheng Zou,Di Wu,Hui Zhang,Kunsong Chen
Gelatin (GA) is a natural protein widely used in food packaging, but its fabricated fibrous film has the defects of a high tendency to swell and inferior mechanical properties. In this work, a novel spinning technique, solution blow spinning (SBS), was used for the rapid fabrication of nanofiber materials; meanwhile, nylon 66 (PA66) was used to improve the mechanical properties and the ability to resist dissolution of gelatin films. Morphology observations show that GA/PA66 composite films had nano-diameter from 172.3 to 322.1 nm. Fourier transform infrared spectroscopy and X-ray indicate that GA and PA66 had strong interaction by hydrogen bonding. Mechanical tests show the elongation at break of the composite film increased substantially from 7.98% to 30.36%, and the tensile strength of the composite film increased from 0.03 MPa up to 1.42 MPa, which indicate that the composite films had the highest mechanical strength. Water vapor permeability analysis shows lower water vapor permeability of 9.93 g mm/m2h kPa, indicates that GA/PA66 film’s water vapor barrier performance was improved. Solvent resistance analysis indicates that PA66 could effectively improve the ability of GA to resist dissolution. This work indicates that SBS has great promise for rapid preparation of nanofibrous film for food packaging, and PA66 can be applied to the modification of gelatin film.Keywords:solution blow spinning;gelatin;nylon 66;modification;rapid fabrication
研究领域:
材料科学
·
纳米技术
·
食品包装
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2021
·
IF 4.833
Zhongying Liu,Yihai Zhou,Liangjun Yang,Renchun Yang
The preparation of high-efficiency photocatalysts by green and mild methods is very attractive for photocatalysis field. Here, TiO 2 /Ti 3 C 2 was prepared by in-situ oxidation with a green method, in which only water or H 2 O 2 was used. A heterojunction interface formed between the anatase phase TiO 2 and the Ti 3 C 2, which was demonstrated by HRTEM and XRD. Fluorescence spectra and i-t transient photocurrent are used to study the separation efficiency of photogenerated electron-hole pairs. The close contact between Ti 3 C 2 and TiO 2 speed up the separation of photo-generated electron-hole pairs, promoting a higher hydrogen production performance around 2520.4 μmol·g −1 ·h −1 on TCT-1.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2016
·
IF 4.052
Jinhu Tian,Shiguo Chen,Chunhua Wu,Jingqiu Chen,Xinyi Du,Jianchu Chen,Donghong Liu,Xingqian Ye
The effects of preparation method (boiled, cooled, and reheated) on the structural characteristics and in vitro digestibility of potato were investigated. The highest equilibrium starch hydrolysis was obtained after boiling (82.21%), followed by reheating (66.98%) and cooling (54.31%). The potato after cooling treatment exhibited a narrower melting temperature range and a higher melting enthalpy compared with the potatoes after boiling and the microwave reheating. X-ray diffraction patterns revealed that the relative crystallinity of the cooled potato was higher than those of the reheated and boiled potatoes, consistent with the results in melting enthalpy. Moreover, compared with the boiled potato, a large number of wrinkles were observed on the surface of the cooled potato, whereas after microwave reheating, larger clearances of starch granule regions were found. This study demonstrated that cooling and microwave reheating significantly affected the potato’s microstructure and digestibility and were suggested as alternative choices to prepare potato dishes.
研究领域:
食品科学
·
营养学
✓ 已验证
DOI
高影响因子
VACUUM
·
2024
·
IF 3.8
Yonghui Yang,Hengwei Yan,Zhanwei Liu,Shenghui Guo,Jin Zhang,Rui Xia
The potential for the preparation of titanium metal through molten salt electrolysis is significant. However, the conventional process of molten salt electrolysis uses chloride molten salt as the electrolyte, which has low solubility for titanium dioxide (TiO 2 ). This paper introduces an innovative approach using a NaF-K 2 TiF 6 system as the molten salt electrolyte, which offered high solubility for TiO 2 . The solubility and dissolution behavior of TiO 2 in NaF-K 2 TiF 6 were analyzed carbon, oxygen and nitrogen analysis (LECO), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and high-temperature Fourier transform infrared spectroscopy (FT-IR). By optimizing the electrolysis temperature, cathode current density, and electrolysis time, titanium metal was successfully prepared, and impurities were removed through water washing and salt washing to obtain pure sponge-like titanium powder. Focused ion beam-scanning electron microscopy (FIB-SEM) analysis revealed that the titanium purity and oxygen content were consistent across both the surface and interior of the powder, thereby indicating effective prevention of oxidation in a vacuum argon (Ar) environment. This method offers the possibility of continuous production of titanium metal through molten salt electrolysis.
研究领域:
材料科学
·
冶金工程
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2021
·Vol. 99
·期 2
·420-429
·
IF 2.326
Shen Qiuwan,Jiang Yuhang,Li Shian,Yang Guogang,Zhang Hongpeng,Zhang Zhonggang,Pan Xinxiang
Achieving efficient and stable hydrogen production has always been the focus of the industry, and ethanol steam reforming (ESR) is one of the most reliable, recyclable, and cheap technologies. Perovskite nanocomposite catalysts LaNi x Co 1 − x O 3− δ ( x = 0, 0.5, 0.9) have been prepared by an EDTA-citric acid complexing sol–gel method and used for hydrogen production by ESR. A scanning electron microscopy (SEM), X‐ray diffraction (XRD), EDS and BET were used to characterize the crystal structure of the fresh and the reduced LaNi 0.5 Co 0.5 O 3− δ . The optimal operating parameters of ESR experiments by Ni-doped LaNi x Co 1 − x O 3− δ perovskites were evaluated in detail. Results indicate that the optimum conditions for ESR are as below: reforming temperature is 600 °C; the molar ratio of H 2 O/C 2 H 5 OH is 5:1. In addition, the stable performance of LaNi 0.5 Co 0.5 O 3− δ under the optimal operating condition was examined. Under the optimal reaction conditions, ethanol conversion of LaNi 0.5 Co 0.5 O 3− δ perovskite as an ESR catalyst can reach the highest 90.2%. The results show that LaNi 0.5 Co 0.5 O 3− δ has excellent stability and catalytic activity.
研究领域:
能源化学
·
催化科学
·
材料工程
✓ 已验证
DOI
高影响因子
FARADAY DISCUSSIONS
·
2017
·Vol. 201
·63-70
·
IF 3.588
Nian Zhao,Ping Li,Xin Mu,Chuanfang Liu,Fuxing Sun,Guangshan Zhu
A novel ultra-stable metal–organic framework, MCIF-1, [Cu2(DCI)2](MeCN), based on dicyanoimidazole and Cu(I), has been synthesized at room temperature successfully. MCIF-1 shows excellent water stability and can retain crystallinity after soaking in water for about one week. In addition, MCIF-1 also shows exceptional resistance under both acidic and basic conditions within a large pH range from 0 to 13.5. What is more, after modifying the synthesis procedure slightly, we can produce this material in a large scale during a very short time. Mild synthesis conditions, excellent stability and ease of large scale production give MCIF-1 great potential for practical use.
研究领域:
材料科学
·
无机化学
·
纳米技术
✓ 已验证
DOI
高影响因子
MOLECULES
·
2017
·Vol. 22
·期 6
·870
·
IF 2.861
Jiao-Jiao Yuan,Frank G.F. Qin,Jun-Ling Tu,Bing Li
Due to the multiple hydroxyl groups in its structure, hydroxytyrosol (HT) is very sensitive to air and light and has very strong instability and hydrophilicity that affect its biological activity. This study attempted to prepare liposomes containing water-soluble HT to improve the bioavailability and biocompatibility of the target drug. The preparation process factors (temperature, mass ratio of phospholipid (PL) and cholesterol (CH), Tween-80 volume, HT mass) were studied and response surface methodology (RSM) was applied to optimize the conditions. The results demonstrated that by using a temperature of 63 °C, mass ratio of PL and CH 4.5:1, HT mass 5 mg and Tween-80 volume of 6 mL, HT liposomes with an encapsulation efficiency (EE) of 45.08% were prepared. It was found that the particle sizes of the HT liposomes were well distributed in the range of 100–400 nm. Compared to free HT, prepared HT liposomes had better stability and a distinct slow release effect in vitro. Besides, HT liposomes presented better DPPH radical scavenging activity than free HT, which could be due to the fact that HT was encapsulated fully inside the liposomes. In addition, the encapsulation mechanism of HT was evaluated. In summary, the results indicated that HT liposome could enhance the antioxidant activity and was a promising formulation for prolonging the biological activity time of the target drug.Keywords:hydroxytyrosol;liposomes;preparation;slow release;antioxidant activity
研究领域:
药剂学
·
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）