نتایج جستجو برای: Microwave-hydrothermal

تعداد نتایج: 67304  

Journal: :IEICE Transactions 2016
Takashi Kunimoto Yoshiko Fujita Hiroshi Okura

A continuous flow reactor equipped with a low-loss flow channel and a microwave cavity was developed for synthesizing nanophosphors. A continuous solution synthesis of YVO4:Eu,Bi nanophosphor was succeeded through the rapid hydrothermal method using this equipment. Internal quantum efficiency of YVO4:Eu,Bi nanophosphor obtained by 20 minutes microwave heating is about 30% at 320 nm as high as t...

2018
Lin Ma Chunhai Jiang Zhenyu Lin Zhimin Zou

Biosorption using agricultural wastes has been proven as a low cost and efficient way for wastewater treatment. Herein, grape peel treated by microwave- and conventional-hydrothermal processes was used as low cost biosorbent to remove methylene blue (MB) from aqueous solutions. The adsorption parameters including the initial pH value, dosage of biosorbents, contact time, and initial MB concentr...

Journal: :journal of nanostructures 2014
a. khanfekr m. tamizifar r. naghizadeh

the synthesis of nb doped batio3 has been investigated under microwave-hydrothermal (mh) conditions in the temperature of 150°c for only 2 h using c16h36o4ti, bah2o2.8h2o and nbcl5 as ba, ti and  nb sources, respectively.  typical experiments performed on mh processing have not yet reported for nb doped batio3.  in the mh process, the formation of high purity nano tetragonal nb-batio3 was stron...

Journal: :Bioresource technology 2013
Patrick Biller Cerri Friedman Andrew B Ross

Microalgae are regarded as a promising source of lipids for bio-diesel production and bio-products. The current paper investigates the processing of microalgal slurries under controlled microwave irradiation. Microwave power was applied to reach temperatures of 80, 100, 120 and 140 °C at a constant residence time of 12 min. Microwave irradiation led to disruption of the algal cell walls which f...

Journal: :Chemistry 2006
Sung Hwa Jhung Jin-Ho Lee Paul M Forster Gérard Férey Anthony K Cheetham Jong-San Chang

Microwave synthesis of two porous nickel glutarates was compared with conventional hydrothermal synthesis. The cubic nickel glutarate, [Ni20(C5H6O4)20(H2O)8] x 40 H2O (1), was synthesized by conventional electrical heating in several hours or days, depending on synthesis temperature. Crystallization was greatly accelerated by microwave irradiation, in which more stable, tetragonal nickel glutar...

2012
Ana Paula de Moura Larissa Helena de Oliveira Máximo Siu Li José Arana Varela Ieda Lucia Viana Rosa

11 12 Abstract Nanorods and nanoplates of Y2O3:Eu 3+ powders 13 were synthesized through the thermal decomposition of the 14 Y(OH)3 precursors using a microwave-hydrothermal meth15 od in a very short reaction time. These powders were 16 analyzed by X-ray diffraction, field emission scanning 17 electron microscopy, Fourrier transform Raman, as well as 18 photoluminescence measurements. Based on ...

This paper presents a novel microwave-assisted hydrothermal technique for synthesizing tin(II) oxide nanoparticles. This technique can be used for producing large quantities of homogeneous nanoparticles in a short time. The effect of the solution molarity, final pH, hydrothermal processing time and microwave power were studied. The tin(II) oxide structure verified from XRD...

Journal: :Chemical communications 2012
Shuai Chen Jia-Wei Liu Mei-Ling Chen Xu-Wei Chen Jian-Hua Wang

Graphene quantum dots prepared by a one-step hydrothermal procedure in a microwave exhibit an unusual emission transformation in strong acidic media and at high concentration, induced by self-assembled J-type aggregation under restrained π-π interactions.

Journal: :Chemical communications 2009
Dieqing Zhang Guisheng Li Xianfeng Yang Jimmy C Yu

A micro-sheet anatase TiO(2) single crystal photocatalyst with a remarkable 80% level of reactive {001} facets was synthesized via a microwave-assisted hydrothermal route involving titanium tetrafluoride and a tetrafluoroborate-based ionic liquid.

Journal: :caspian journal of chemistry 2013
seyed naser azizi abdolrauf samadi-maybodi mohammad hossein fatemi neda asemi

perlite or pearl stone is a natural glass which has formed by rapid cooling of viscous lava or magma. perlite is mainly composed of silica, aluminum, potassium and sodium. in this experiment, perlite was used as a low-cost source of si and al to synthesis of sodalite zeolite using the alkaline hydrothermal treatment. a statistical taguchi design of experiments was employed to evaluate the effec...

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