نتایج جستجو برای: microwave assisted hydrothermal technique

تعداد نتایج: 787513  

2015

The major challenges for industrial commercialized biodiesel production from microalgae are the high cost of downstream processing such as dewatering and drying, utilization of large volumes of solvent and laborious extraction processes. In order to address these issues the microwave irradiation method was used to produce biodiesel directly from wet microalgae biomass. This alternative method o...

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 BaTi...

Journal: :Ultrasonics sonochemistry 2015
Meryem Boukroufa Chahrazed Boutekedjiret Loïc Petigny Njara Rakotomanomana Farid Chemat

In this study, extraction of essential oil, polyphenols and pectin from orange peel has been optimized using microwave and ultrasound technology without adding any solvent but only "in situ" water which was recycled and used as solvent. The essential oil extraction performed by Microwave Hydrodiffusion and Gravity (MHG) was optimized and compared to steam distillation extraction (SD). No signif...

Journal: :Analytical chemistry 2007
Wei-Yu Chen Yu-Chie Chen

In this study, we demonstrated that microwave-assisted enzymatic digestion could be greatly accelerated by multifunctional magnetite beads. The acceleration of microwave-assisted enzymatic digestion by the presence of the magnetite beads was attributable to several features of the beads. Their capacity to absorb microwave radiation leads to rapid heating of the beads. Furthermore, their negativ...

Journal: :International Research Journal on Advanced Science Hub 2021

Nanoscience is assumed to have capability change the efficiency of current electronic and electrical devices. So nanotechnology being developed achieve same. Various kinds nanomaterials are prepared such that they show tremendous properties at nanoscale dimensions. Hence, it worth studying about synthesis nanomaterials. The information we present in this paper corresponds a basic review on rece...

2015
Manuel F Meléndrez Carlos Medina Francisco Solis-Pomar Paulo Flores Mani Paulraj Eduardo Pérez-Tijerina

Silver nanowires (Ag-NWs) were obtained using microwave-assisted hydrothermal method (MAH). The main advantage of the method is its high NWs production which is greater than 90%. It is also easy, fast, and highly reproducible process. One of the drawbacks presented so far in the synthesis of nanostructures by polyol path is the high temperature used in the process, which is superior than the bo...

Journal: :Journal of environmental sciences 2016
Hanlin Chen Yen-Ping Peng Ku-Fan Chen Chia-Hsiang Lai Yung-Chang Lin

This study employed microwave-assisted hydrothermal method to synthesize Ti-MCM-41, which are mesoporous materials with a high surface area and excellent photocatalytic ability. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and ultraviolet-visible spectroscopy (UV-Vis) were employed. The X...

Journal: :Chemical communications 2011
Renlong Liang Huaqiang Cao Dong Qian

MoO(3) nanowires synthesized using a biomolecule-assisted hydrothermal approach showed excellent adsorption ability for the removal of RhB and were also shown to be excellent pseudocapacitor materials.

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2007
ahmad shaabani peiman mirzaei

microwave-assisted three component cyclocondensation reactions of aldehydes, amides and dienophiles in the presence of acetic anhydride and para-toluenesulfonic acid as a catalyst to afford the highly substituted cyclohexene derivatives, in relatively good yields after several minutes are reported.

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