A new bisphosphinoamine linker with ethoxysilyl group has been synthesized and applied for anchoring nickel catalysts to alumina and silica. Side reactions occurred, and the reactions of various bisphosphinoamine ligands with silica were studied by 31P CP/MAS and suspension HR-MAS NMR. Besides the desired immobilization, two main side reactions have been found. The phosphine moieties of the lin...

The vapor-liquid-solid (VLS) process is a fundamental mechanism for the growth of nanowires, in which a small size (5-100 nm in diameter), high melting point metal (such as gold and iron) catalyst particle directs the nanowire's growth direction and defines the diameter of the crystalline nanowire. In this article, we show that the large size (5-50 microm in diameter), low melting point gallium...

A novel tubular device has been developed for hydrogen sulfide determination in air. Several substrates such as commercial silica gel and alumina TLC plates, silica gel powder, alumina, CaSO(4), CaCO(3), BaSO(4), MgO, chalk, alpha-cellulose and ethyl cellulose were tested as solid substrates. 30-70-mesh silica gel was finally employed in glass tubes of 4.0 mm internal diameter. Silica gel is tr...

Coagulation is presented as an efficient alternative to reduce the silica content in 14 effluents from recovered-paper mills that are intended to be recycled by a final reverse15 osmosis (RO) step. Coagulation pretreatment by several polyaluminum chlorides 16 (PACls) or FeCl3 was optimized prior to the RO process. PACls with low alumina 17 content and high basicity achieved almost a 100% remova...

Supported manganese oxide catalysts were prepared by the impregnation of alumina foam blocks washcoated with alumina and silica. The manganese content based on the weight of the washcoats was 10 wt % calculated as MnO2. Fourier transform profiles of the Mn K-edge EXAFS spectra for these samples gave three distinctive peaks at 0.15, 0.25, and 0.32 nm and were close to the profiles of Mn3O4 and b...

Light-weight ferro-aluminium alloys are finding increasing application in the transport sector to reduce overall weights, energy costs and CO2 emissions. As the primary production processes of both Fe and Al are among the most energy-intensive industrial processes in the world, there is an urgent need to develop alternate routes for producing Fe-Al alloys. Our group has successfully produced th...