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Journal of Nanoscience and Nanotechnology

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https://www.readbyqxmd.com/read/30189972/effect-of-crystallization-on-the-catalytic-cracking-performance-of-zeolite-socony-mobil-5
#1
Maojiong Cao, Youyong Su, Bing Xue, Yuxiang Yang, Xiangnong Liu
In the research, zeolite socony mobil-5 (ZSM-5) catalyst was prepared by hydrothermal method and characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), NH3-temperature programmed desorption (NH3-TPD) and Brunauer- Emmett-Teller (BET). The catalytic products from Jatropha carcass L. oil were analyzed by gas chromatography-mass spectrometer (GC-MS). The effects of crystallization time and crystallization temperature on catalytic cracking performance of ZSM-5 were investigated...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189971/different-crystal-form-titania-supported-ruthenium-nanoparticles-for-liquid-phase-hydrodeoxygenation-of-guaiacol
#2
Wei Long, Yang Lv, Pingle Liu, Fang Hao, Wei Xiong, Xie Li, Haishuai Cui, He'an Luo
Titania supported Ruthenium-based catalysts were prepared for liquid phase hydrodeoxygenation of guaiacol to cyclohexanol. The catalytic performance is affected by the different crystal forms of titania supports. Anatase and rutile titania supported catalyst 5%Ru/a-r-TiO2 presents higher BET surface area, better dispersion of Ru particles with smaller particle size of 3-4 nm, more acidic centers, and more Ruδ+ located at the boundary between anatase titania and rutile titania. Hence, 5%Ru/a-r-TiO2 gives the best catalytic performance of 95...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189970/effects-of-continuous-phase-and-crosslinking-agent-on-the-rheological-behaviors-and-properties-of-cationic-poly-urethane-acrylate-emulsifier-free-microemulsions
#3
Guiqiang Fei, Yu Zhang, Xia Wang, Xiaorui Li, Haihua Wang
Cationic poly(urethane-acrylate) emulsifier-free microemulsions are prepared by seeded emulsion polymerization (SPUA) or in-situ emulsion polymerization (IPUA) with (a) or without (b) crosslinking agent hydroxyethyl acrylate (HEA). Furthermore, no surfactant is introduced into the reaction system. The effect of continuous phase and HEA on the rheological behavior and properties of microemulsions are studied. The results show that IPUA using vinylmonomers as the continuous phase and with HEA (IPUAMB-b) has the highest ζ value, lowest coagulation ratio, smallest particle size of 48 nm and apparent core-shell structures...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189969/assessments-of-different-methods-for-testing-heteroresistance-to-rifampicin-in-tubercle-bacillus
#4
Junlin Chen, Fei Huang, Xi Yin, Delin Gu
This study was undertaken to compare the ability of four clinically used methods to detect the heteroresistance of the tubercle bacillus to Rifampicin (Rif). A total of 94 sputum smear-positive samples of re-treated tuberculosis (TB) patients were employed. Rif-resistant tubercle bacillus tests were carried out by four methods: Lowenstein-Jensen cultures (L-J), reverse transcription-polymerase chain reaction (RT-PCR), microscopic observation drug susceptibility (MODS), and high-resolution melting (HRM). The rates of detection of Rif-resistant bacteria by of L-J, RT-PCR, MODS, and HRM were 35...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189968/study-on-the-fabrication-of-white-organic-light-emitting-devices-using-the-doping-characteristics-of-rubrene-and-programmed-test-circuit
#5
Shumei Li, Xu Li, Lizhong Wang, Hongbo Liu
A white organic light emitting device with structure of ITO/2T-NATA(20)/NPBX(15)/DPVBi(15)/ Alq:Rub(10, x)/Alq3(40)/LiF/Al was fabricated using doping rubrene. When the concentration of rubrene is 3 wt.%, the chromaticity is the best (0.319, 0.317), and the color coordinates are stable. When the thickness of the doping layer is 20 nm, the efficiency and luminance of the devices are the highest, which are 5.1022 cd/A and 17130 cd/m2, respectively. On the basis, a test system is consisted of Solomon's OLED display control driver chip SSD1306 and microcontroller AT89C52, which tests the OLED dot matrix through the program to determine whether the matrix has dead point...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189967/research-on-the-properties-of-solid-oxide-fuel-cells-based-on-composite-cathode-of-ybaco-1-4-cu-0-6-o-5-%C3%AE-x-sdc
#6
Haidong Qi, Xinmin Fu, Minghui Liu, Lizhong Wang, Hongbo Liu
The new type of cathode material YBaCo1.4Cu0.6-O5+δ-xSDC (x = 20, 30, 40, 50 wt.%) was synthesized by sol-gel method, electrolyte material of Ce0.8Sm0.2O1.9 (SDC) and La0.9Sr0.1Ga0.8Mg0.2O3-δ (LSGM) were synthesized by glycine combustion, composite cathode materials were prepared by mixing the two materials evenly. The performance was analyzed using the ac impedance spectrum and SEM, the best performance was obtained with the ratio of x = 30%. After 2 hour sintering at 950 °C, YBCC-30%SDC cathode polarization resistance are 0...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189966/ultraviolet-photodetector-based-on-ito-mgo-zno-structure-grown-by-hydrothermal-process
#7
Yunfeng Wu, Naisen Yu, Haiying Du, Dongping Liu, Hongwei Liang, Guotong Du
A simple two-step aqueous method was employed to grow MgO nanostructures on ZnO/sapphire at low temperature. The obtained thin MgO nanostructures were uniformly distributed on the surface of ZnO layer and showed the sheet-like structures. Meanwhile, an ultraviolet (UV) photodetector based on ITO/MgO/ZnO structures was fabricated by simple way. The obtained UV detector showed excellent UV sensing properties. This novel method will greatly facilitate fabrication of large-scale metal-insulator-semiconductor with relatively low cost at remarkably low temperature...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189965/biogenic-synthesis-of-agnps-with-saussurea-lappa-c-b-clarke-and-studies-on-their-biochemical-properties
#8
Muhammad Riaz, Muhammad Altaf, Amir Faisal, Muhammad Azhar Shekheli, Ghulam Abbass Miana, Muhammad Qayyum Khan, Muhammad Ali Shah, Syed Zafar Ilyas, Ayaz Arif Khan
Nanotechnology has become an irreplaceable need and green synthesis of nanoparticles offers several advantages over physical and chemical methods. Medicinal plants are the main reservoirs of drugs and drug candidates. We report the biogenic synthesis of silver nanoparticles (AgNPs) using aqueous root extract of Saussurea lappa. Verification and characterization of these nanoparticles were done by UV-visible spectroscopy, XRD-analysis and Scanning Electron Microscopy and FT-IR. Extract-loaded-AgNPs showed the highest inhibition zone against Escherichia coli (11...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189964/green-synthesis-of-silver-nanoparticles-using-jurinea-dolomiaea-and-biological-activities
#9
Muhammad Riaz, Muhammad Altaf, Muhammad Qayyum Khan, Saima Manzoor, Muhammad Azhar Shekheli, Muhammad Ali Shah, Syed Zafar Ilyas, Zakir Hussain
Green syntheses of nanoparticles using plant materials are of tremendous scope. Here we report advantageous green synthesis for silver nanoparticles (AgNPs) using aqueous-root extract of Jurinea dolomiaea and AgNO3. Color change of solution and UV-Vis absorption at 444 nm indicated the formation of AgNPs. XRD confirmed their face centered cubic structure (fcc) with average particle size of 24.58 nm. SEM analysis showed their spherical, cubic and triangular structures. FT-IR indicated the presence of functional groups of reducing and stabilizing phytochemicals...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189963/laser-structuring-of-underwater-bubble-repellent-surface
#10
Shuai Yang, Kai Yin, Xinran Dong, Jun He, Ji-An Duan
Bubbles in aqueous media are pervasive and unavoidable. However, underwater gas bubbles adhesion to the metal pipework can sometimes seriously damage the surface and reduce the useful life of devices. Herein, we report a simple way to fabricate underwater bubble-repellent surface by one-step femtosecond laser direct writing technology. The as-prepared surface exhibits superhydrophilicity in air and superaerophobicity in water, and the bubble contact angles reach 159±2.5° in water. The surface presents ultralow bubble adhesion, and the rolling angle of the bubble is small...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189962/a-multi-frequencies-micro-electromagnetic-vibration-energy-harvester-with-nonlinearity-for-expanding-the-frequency-band
#11
Yiming Lei, Xiaojuan Chen, Zhiyu Wen
In this paper, we proposed a multi-frequencies electromagnetic vibration energy harvester (EVEH) with a wider operating frequency band. The EVEH contains three different vibration picking-up systems with different natural frequencies. A broadened bandwidth was obtained by combining the structural nonlinearity of the vibration picking-up systems with the multi-frequencies, while the vibration energy harvest was increased by adopting two induction coils in the EVEH system. At an acceleration of 1.5g and frequencies of 45...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189961/ordered-silica-nanosphere-templates-large-area-assembly-and-characterization
#12
Qianqian Su, Chang Liu, Ao Dong, Pengfei Xu, Weiping Qian
Ordered silica nanosphere templates, which are usually known as colloidal crystals, are most widely used to prepare ordered porous nanostructure materials among the templates to fabricate nanostructure materials. We present here a method for the simultaneous assembly of multiple ordered silica nanosphere templates with same quality, in which a glass trough together with a stand was used as the experimental cell. Two different diameters of silica colloidal particles were selected for our experiments, namely ∼190 nm and ∼280 nm...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189960/preparation-and-characterization-of-bi%C3%A2-ti%C3%A2-o-7-pyrochlore-by-acetone-solvothermal-method
#13
Panjie Li, Caiyun Jiang, Qiong Wang, Kaichao Zuojiao, Zheng Zhang, Jiaxun Liu, Yuping Wang
In this study, we reported a novel synthesis route of Bi2Ti2O7 pyrochlore by acetone solvothermal method. The bismuth nitrate and tetrabutyl titanate were used as reactant, and acetone was used as solvent. XRD patterns showed that the pure Bi2Ti2O7 particles were synthesized when the molar ratio of Bi/Ti was between 0.4 and 0.8. The SEM showed that the Bi2Ti2O7 crystal was uniform spherical particles. The carboxylic acid produced in the reaction system may be the main factor of bismuth mineralization. Compared with TiO2, pure Bi2Ti2O7 photocatalyst exhibited superior photocatalytic activity for methyl orange (MO) and tetracycline hydrochloride (TC) under simulated solar light...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189959/high-performance-supercapacitors-based-on-%C3%A9-mno%C3%A2-rgo-fiber-electrodes-for-wearable-energy-storage
#14
Xibin Liu, Gaohua Liao, Xiang Qi, Xiaoan Mei, Jifei Wang, Yong Wei, Kun Qian, Chang Li, Wei Tao, Jiayou Tao
Hybrid fibers based on MnO2/reduced graphene oxide have been fabricated for flexible energy storage devices. Graphene oxide nanoflakes were reduced in a polytetrafluoroethylene (PTFE) pipeline under the appropriate condition to develop a fiber current collector, which also provides the possibility of weaving. The RGO fiber with the radius of about 35 μm has a resistance of 150 Ω · cm. MnO2 nanoflakes directly grow on the RGO fiber surface acting as the electrode material of the device. The MnO2/RGO hybrid fibers provide excellent energy storage performances...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189958/graphene-oxide-affects-growth-and-resistance-to-sclerotinia-sclerotiorum-in-brassica-napus-l
#15
Yufeng Liu, Chengfei Yuan, Yong Cheng, Guoxin Yao, Lingli Xie, Benbo Xu
Researchers have shown that graphene oxide has a significant effect on plant and pathogen growth and development. To better understand the effect of graphene oxide on the resistance of Brassica napus L. to Sclerotinia sclerotiorum, Zhongshuang 11 was used to evaluate changes in the morphology and physiology after graphene oxide treatment. Detached leaf inoculation was used to detect S. sclerotiorum infection in rapeseed. The results indicated that treatment with a low concentration of graphene oxide had no significant effect on the growth of B...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189957/ultralong-tio%C3%A2-b-nanowires-tio%C3%A2-nanoparticles-composites-for-rapid-electron-transport-in-dye-sensitized-solar-cells
#16
Min Guo, Lu Yang, Jia Chen, Jun Zhang, Haijun Su, Lin Liu, Keyu Xie
The relatively small electron diffusion coefficient and high charge recombination rate of TiO2 nanoparticle (NP) film limit charge collection in TiO2 NP based dye-sensitized solar cells (DSSCs). Herein, ultralong bending TiO2 (B) nanowires (NWs) were introduced to TiO2 NP photoanode and expected to modify electron transport of DSSCs. The TiO2 (B) NWs/TiO2 NP composite structure was prepared by a facial process combining the stirring hydrothermal method with mechanical mixing method. When the composite structure was applied to DSSCs, the rapid electron transport pathway was formed in photoanode, which was clarified by the small electron transport resistance and long electron diffusion length, improving the charge collection efficiency...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189956/a-study-on-the-structure-and-the-photoelectrical-properties-of-the-al-doped-zno-thin-films-by-atomic-layer-deposition-in-low-temperatures
#17
Guangde Wang, Xinyu Zhang, Wenlong Jiang, Lizhong Wang
The AZO transparent conductive films are prepared by the atomic layer deposition (ALD) at a low temperature of 150 °C. The different Al-Zn doping ratios were designed during the deposition. The phase structure of the films was characterized by XRD, the electrical properties of thin films were analyzed by the Holzer test, and the optical properties of thin films were analyzed by the UV-3600 (UV-VIS-NIR) spectrophotometer. The results showed that all the films preferred the orientation of the C axis during the growth process, the AZO films have a very low resistivity of 6...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189955/influence-of-al%C3%A2-o%C3%A2-nanoparticles-on-corrosion-inhibition-performance-of-benzotriazole-to-brass
#18
Feng Wang, Hong-Hua Ge, Kai Wu, Jun-Yi Sha, Le-Tian Wang, Chuan Wan, Yu-Zeng Zhao, Xin-Jing Meng
The influence of Al2O3 nanoparticles on corrosion inhibition of benzotriazole (BTA) in brass/ simulated water system was studied by potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS). The results show that BTA has good corrosion inhibition effect on brass. Al2O3 nanoparticles could reduce the corrosion inhibition performance of BTA. The higher the concentration of Al2O3 nanoparticles in simulated water, the lower corrosion inhibition performance of BTA. The isothermal adsorption of BTA on brass surface in simulated water and Al2O3 nanofluids was analyzed...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189954/effects-of-tio%C3%A2-nanofluid-on-the-surface-state-of-brass
#19
Kai Wu, Hong-Hua Ge, Feng Wang, Jun-Yi Sha, Le-Tian Wang, Chuan Wan, Yu-Zeng Zhao, Xin-Jing Meng
The surface states of brass in simulated cooling water (SCW) containing or free of sodium dodecyl benzene sulfonate (SDBS) and TiO2 nanofluid were analyzed by means of scanning electron microscope (SEM), energy spectrum analysis (EDS) and X-ray diffraction (XRD). The concentrations of Cu and Zn ions in the solution after brass immersion were analyzed using a plasma emission spectrometer. The relationship between the surface states and corrosion resistance of brass was investigated by electrochemical impedance spectroscopy (EIS)...
December 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30189953/a-numerical-study-of-the-effects-of-nano-biological-scaffolds-on-inflammatory-vascular-wall
#20
Yonggang Xiong, Wanpeng Tian
This research investigated the effect of different nano-biological scaffolds on blood vessel walls by numerical analysis. The dynamics behavior of fluids and the mechanical property of vessel wall were studied when the blood vessel wall was in the state of inflammation. Employing straight and bent blood vessels as 3D models, this research simulated the blood flow in the inflammatory blood vessels and put forward the mathematical method to analyze mechanical characteristics of the vessel walls under the condition of the bi-directional coupling...
December 1, 2018: Journal of Nanoscience and Nanotechnology
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