To harvest solar energy efficiently, a series of Zn/Bi layered double hydroxide (LDH) photocatalysts with different molar ratios of Zn/Bi (2 : 1, 3 : 1, 4 : 1) has been synthesized by a coprecipitation method at constant pH. All the Bi doped LDH samples displayed hydrotalcite-like structure with interlayer carbonate, in which crystallinity decreases as the bismuth content increases. The Zn/Bi (...

Abstract Within the Venetian Pre-Alps, Borcola Pass connects Posina (Vicenza province) and Terragnolo (Trento valleys. The valley is located north of Schio (Vicenza) within Italian Southern Alps structural unit. In this area, injection Paleogene basaltic dykes along fault/fractures in late Triassic Dolomia Principale unit has produced a local metamorphism dolomite rock into marble characterized...

This is the first of a series of five papers in which the thermodynamic properties of minerals are interpreted in terms of lattice vibrational spectra. In this paper, measured heat capacities for minerals are examined in terms of the Debye theory of lattice vibrations, and it is demonstrated that heat capacities of silicates show large deviations from the behavior expected from Debye theory. Th...

Polyethylene/chrysotile nanocomposites with different amount (0.4 to 6.7 wt%) of filler were prepared by in situ polymerization method using the metallocene Cp2ZrCl2 as catalyst and methylaluminoxane (MAO) as co-catalyst. Previous to polymerization, raw chrysotile was treated by three different methods that used thermal treatment and acid leaching. In method A, raw chrysotile was treated therma...

BACKGROUND Layered hydroxides salts (LHS), a layered inorganic compound is gaining attention in a wide range of applications, particularly due to its unique anion exchange properties. In this work, layered zinc hydroxide nitrate (LZH), a family member of LHS was intercalated with anionic ciprofloxacin (CFX), a broad spectrum antibiotic via ion exchange in a mixture solution of water:ethanol. ...

Many exposed high-pressure meta-serpentinites comprise a channelized network of olivine-rich veins that formed during dehydration at depth and allowed the fluid to escape from dehydrating rock. While previous studies have shown chemical heterogeneities in rocks can control formation olivine-enriched vein-like interconnected porosity networks on sub-millimeter scale, it is still unclear how thes...

A new method is developed to control water fugacity at a fixed pressure and temperature. We use two divariant phase assemblages (clinohumite–periclase–forsterite and brucite–periclase) in the MgO– SiO2–H2O system and the chemical reactions among co-existing phases buffer the water fugacity. In order to avoid a reaction between the water fugacity buffer and the specimen, a double-capsule assembl...

Ag2Cu3Cr2O8(OH)4, a new Ag-Cu-Cr-O layered mixed oxide, prepared by soft hydrothermal heterogeneous reactions, is reported. The new phase is an oxyhydroxide and presents a structure with alternating brucite-like Cu-O and Ag-O layers connected by individual chromate groups. The crystallographic structure has been solved and refined from high resolution powder X-ray diffraction data and is suppor...

A new method to determine fluid flux at high pressures and temperatures has been developed used study serpentinites subduction zone conditions. Drill cores of a natural antigorite-serpentinite with strong foliation were in multi-anvil experiments the range 2–5 GPa 450–800°C. Fluids released upon dehydration are fixed by formation brucite an adjacent sink. The amount distribution serves as proxy...