METAL CHALCOGENIDE NANOPARTICLE GEL NETWORKS: THEIRFROMATION MECHANISM AND APPLICATION FOR NOVEL MATERIALGENERATION AND HEAVY METAL REMEDIATION VIA CATIONEXCHANGE REACTIONSby IRINA R. PALAMay 2012Advisor: Dr. Stephanie L. BrockMajor: ChemistryDegree: Doctor of PhilosophyThe dissertation research is focused on (1) uncovering the mechanism of metalchalc...

Cozymase (diphosphopyridine nucleotide, DPN) has been assayed by a variety of biochemical and chemical methods (1). Among the simplest procedures has been the determination of the light absorption of reduced DPN at 340 rnp after reduction by sodium hydrosulfite. Since special precautions are required to remove completely the excess reducing agent which absorbs in this region, it appeared advant...

Ammonium borohydride, NH(4)BH(4), has a high hydrogen content of ρ(m) = 24.5 wt% H(2) and releases 18 wt% H(2) below T = 160 °C. However, the half-life of bulk NH(4)BH(4) at ambient temperatures and pressures, ~6 h, is insufficient for practical applications. The decomposition of NH(4)BH(4) (ABH(2)) was studied at variable hydrogen and argon back pressures to investigate possible pressure media...

The synthesis of surfactant-free and organic ligand-free metallic nanoparticles in solution remains challenging due to the nanoparticles’ tendency aggregate. Surfactant- are particularly desirable catalytic applications as surfactants, ligands can block access surfaces. In this contribution, platinum synthesized aqueous without surfactants or bound ligands. Pt is reduced by sodium borohydride, ...

A new borohydride, [CH(3)NH(3)](+)[BH(4)](-), has been synthesized through the metathesis of CH(3)NH(3)F and NaBH(4) in methylamine. Room-temperature X-ray diffraction studies have shown that [CH(3)NH(3)](+)[BH(4)](-) adopts a tetragonal unit cell with considerable hydrogen mobility similar to that observed in NH(3)BH(3). The kinetics and thermodynamics of hydrogen release have been investigate...

This work is aimed at preparation of small silver nanoparticles (Ag NPs) with various sizes using two-step preparation method. The silver bromide nanoparticles were prepared in the first step and they were reduced to metal silver nanoparticles in the second step. Size of prepared silver nanoparticles was controlled by using of several modifiers. Two surfactants (SDS and Tween 80) and two natura...

The anionic borohydride ligand, [BH4], is known to bind to metals by means of unidentate, bidentate, and tridentate binding modes, making it a useful ligand for the achievement of high coordination numbers in inorganic and organometallic complexes. Combinations of borohydride ligands with metal centers having large atomic radii often leads to complexes with coordination numbers higher than 12. ...

The performance of an alkaline fuel cell is investigated using three different fuels, e g., methanol, ethanol and sodium borohydride. Pt/C/Ni was used as anode whereas Mn/C/Ni was used as standard (Electro-Chem-Technic, UK) cathode for all the fuels. Thus, the alkaline fuel cell is used for multi-fuel system. Fresh mixture of electrolyte, potassium hydroxide (5M), and fuel (2M) was fed to and w...

Correction statement In the Methods section of our published article [1], we mentioned that “we developed a novel in situ means of preparing stabilized Au or Ag NPs...”. However, we have recently noticed that the similar process has been reported by Moreno et al. [2]. Hence, we correct the statement in our manuscript by crediting the work by Moreno et al. [2]: [Before Correction] “We developed ...