نتایج جستجو برای: nabh4

تعداد نتایج: 803  

2000
Mariappan Periasamy Muniappan Thirumalaikumar

NaBH4 does not reduce carboxylic acids, esters, amides and nitriles under ambient conditions. However, the reactivity of NaBH4 can be enhanced by the addition of certain additives. For example, addition of iodine to NaBH4 in THF provides H3B–THF that is useful for hydroborations and reductions of various functional groups. The aldehydes and ketones are reduced in a fast manner by the NaBH4 reag...

Journal: :European Journal of Inorganic Chemistry 2008

Journal: :Journal of Synthetic Organic Chemistry, Japan 1982

Nuclear quadrupole resonance (NQR) spectroscopy is an accurate method for determination of electric charge distribution around quadrupolar nuclei. Using ab initio computational methods, it is possible to calculate the Nuclear Quadrupole Coupling Constants (NQCCs) with high accuracy and obtain the useful structural information by using these parameters. Sodium Borohydride, NaBH4, is a metal hydr...

2015
Hamza Simsir Nurettin Eltugral Selhan Karagoz

Surface modification and functionalization has been an important tool for scientists in order to open new frontiers in nanoscience and nanotechnology. Desired surface characteristics for the intended applications can be achieved with surface functionalization. In this work, the effect of water soluble ligands on the adsorption capabilities of silver nanoparticles onto AC which was synthesized f...

2015
Yong Li Yuxin Zhang Yuxi Gu Yufei Cai Ruizhu Zhang Xueping Zheng

For the purpose of improving hydrogen release capacity of NaBH4, hydrogen generation performance of NaBH4 was catalyzed by Co2B and TiO2 compound with different mole ratio and percentage composition are investigated. The experiment mainly concentrated in the hydrogen generation rate and the hydrogen generation volume. The results indicate that the effects of hydrogen release of NaBH4 when the p...

Journal: :iranian journal of catalysis 2012
arash shokrolahi abbas zali hamid reza pouretedal

the hydrolysis of sodium borohydride as a source of hydrogen gas is studied at different mole ratios of h+ to nabh4. the sulfonated porous carbon (spc) is used as a source of hydrogen ion and catalyst. it is found that the sulfonated porous carbon exhibits high activity for the hydrolysis of nabh4 to generate hydrogen gas at room temperature in comparison to amberlyst-15 and nafion-nr50. the ki...

2010
Akshaya K. Samal Thalappil Pradeep

An improvement in the previously reported seed-mediated chemical synthesis of gold nanorods (GNRs) is reported. Monodisperse GNRs have been synthesized in a one-step protocol. The addition of controlled quantity of sodium borohydride (NaBH4) directly into the growth solution produced uniform GNRs, formed by in situ nucleation and growth. In order to arrive at the conclusion, we studied the form...

2004
P. Vajeeston P. Ravindran A. Kjekshus H. Fjellvåg

The ground-state crystal structures of the boron hydride series ABH4 (A = Li, Na, K, Rb, Cs) have been established from first principle projected-augmented plane-wave calculations by considering different possible structural arrangements and subjecting the test structures to structural relaxations. LiBH4 crystallizes with orthorhombic symmetry (KGaH4-type; Pnma), NaBH4, KBH4, and RbBH4 with tet...

2009
W. L. Liong Srimala Sreekantan Sabar D. Hutagalung

The effect of concentration of reduction agent of sodium borohydrate (NaBH4) on the properties of silicon nanoparticles synthesized via microemulsion route is reported. In this work, the concentration of the silicon tetrachloride (SiCl4) that served as silicon source with sodium hydroxide (NaOH) and polyethylene glycol (PEG) as stabilizer and surfactant, respectively, are keep fixed. Four sampl...

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