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A facile approach towards self-reinforced antibacterial paper(SRAP)

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Journal of Bioresources and Bioproducts 2016年第2期1卷 80-84页

作者： Jinxia Ma Wenhua Zhu Pu Ma Zhiguo Wang Xiaofan Zhou Huining Xiao Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology Nanjing Forestry UniversityNanjing 210037China Department of Chemical Engineering University of New BrunswickFredericton E3B 5A3Canada

A facile process to prepare self-reinforced antibacterial paper(SRAP)was developed by in situ synthesis of zinc oxide(ZnO)in partially dissolved *** SRAP was fabricated by impregnating filter paper in zinc chloride(ZnCl_(2))solution and then reacting with sodium hydroxide(NaOH).Filter paper was firstly impregnated with ZnCl_(2) solution of 65 wt%concentration for 5 seconds at 80℃,and then pressed at 3.85 kPa for 5 seconds to remove excess ***,the paper was soaked in a 0.8 wt%NaOH solution for 1 hour,and then washed with deionized water,and dried finally to yield *** dispersive X-ray spectroscopy(EDS),X-ray photoelectron spectroscopy(XPS)and scanning electron microscope(SEM)were used to characterize the *** results revealed that the SRAP contained intact cellulose fibers as the skeleton,gelled cellulose as the matrix,and clusters of nano ZnO particles as the *** SRAP had a much higher density,tensile and burst strength,compared with the untreated cellulose paper,and the folding strength was enhanced by more than fifteen *** addition,the SRAP had outstanding antibacterial properties due to the presence of nano ZnO particles.

关键词： cellulose elf-reinforced antibacterial paper zinc chloride ZnO nano particles

Fabrication and Investigation of the Magnetic Properties of Co and Co3O4 nanoparticles

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Optics and Photonics Journal 2016年第8期6卷 62-68页

作者： Fardin Taghizadeh Department of Physics College of Sciences Yasouj University Yasouj Iran

The nanoparticles exhibit some novel optical and magnetic properties, which are different from its bulk material. Cobalt oxide has been known as a semi-conductor compound of p type with a Spinel structure. Therefore, they are used as gas sensor and absorbent of solar energy. Furthermore, they are employed as an effective catalyzer in environmental clearing. In the thermal gradation method, carbonyl cobalt Co2(CO)8 is often used as a precursor, though cobalt carbonyl is very toxic and expensive. Magnetic compounds have been among interesting issues for human beings for over 4000 years. In large societies, magnetic compounds including computer disks, credit cards, speakers, coolers, automatic doors, and many other devices can be observed on a daily basis. The structure and morphology of as-prepared Co3O4 nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The TEM images showed that the product nanoparticles consisted of dispersive quasi- spherical particles with a narrow size distribution ranged from 5 to 15 nm and an average size around 10 nm. The magnetic measurements confirmed that the Co3O4 nanoparticles show a little ferromagnetic behavior which could be attributed to the uncompensated surface spins and finite size effects. The ferromagnetic order of the Co3O4 nanoparticles is raised with increasing the decomposition temperature.

关键词： Magnetic Properties nano particles Fabrication Method Co3O4

Cation Distribution in Lithium Ferrite(LiFe_(5)O_(8))Prepared via Aerosol Route

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Journal of Electromagnetic Analysis and Applications 2010年第1期2卷 51-55页

作者： Sonal Singhal Kailash Chandra Department of Chemistry Panjab UniversityChandigarhIndia Institute Instrumentation Centre Indian Institute of TechnologyRoorkeeIndia

nano size lithium ferrite was prepared through aerosol route and characterized using TEM, XRD, magnetic measurements and M?ssbauer spectroscopy. The particle size of as obtained samples were found to be ~10 nm through TEM, that increases upto ~80 nm on annealing at 1200 oC. The unit cell parameter ‘a’ calculated using XRD, confirms the formation of ?-LiFe5O8. Room temperature M?ssbauer spectra of as obtained sample of all the ferrites exhibited broad doublet suggesting super paramagnetic nature. This doublet further resolved into two doublets and assigned to the surface region atoms and internal region atoms of the particles. The annealed samples (1200 oC) show broad sextets, which were fitted with two sextets indicating different local environment of both tetrahedrally and octahedrally coordinated Fe-cation. Cation distribution obtained from the X-ray, magnetic and M?ssbauer data confirms that the three fifth of the iron atom goes in to the octahedral site.

关键词： nano particles Saturation Magnetization Coercivity X-Ray Diffraction Mossbauer Spectra

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纳米炭黑的组装行为研究

纳米炭黑的组装行为研究