摘要:
A method etching a glass material comprises providing an etchant comprising 10-30% HF, 5-15% HNO3,and at least 10% H3PO4 by volume constituted such that the ratio HF:HNO3 by volume is in the range of 1.7:1 to 2.3:1, providing a glass material to be etched, and contacting the glass material with the etchant. The etchant desirably has no other acid components. The method may be performed with the etchant temperature within the range of 20-30° C. The glass material may be an aluminosilicate glass. Ultrasound energy may be applied to the etchant, to the glass material, or both.
摘要:
Described herein are methods for improved transfer of graphene from formation substrates to target substrates. In particular, the methods described herein are useful in the transfer of high-quality chemical vapor deposition-grown monolayers of graphene from metal, e.g., copper, formation substrates to ultrathin, flexible glass targets. The improved processes provide graphene materials with less defects in the structure.
摘要:
A method of making an activated carbon honeycomb filter article, as defined herein, including: extruding a batch mixture to form an extruded honeycomb body, the batch including: an activated carbon powder; a first organic binder powder; a rheological plasticizing liquid; a porous inorganic binder powder; an extrusion aid; and water by superaddition, drying the extruded honeycomb body; and heat treating the dried honeycomb body. Also disclosed is an honeycomb filter article, having: an activated carbon; a porous inorganic binder powder; a BET surface area of from 950 m2/g to 1600 m2/g; a cell density of from 50 to 2000 cpsi; and a density of from 0.5 to 0.8 g/cm3.
摘要:
Methods and apparatus provide for subjecting water contaminated with one or more heavy metals to an ion exchange process such that a total quantity of anions within the water are reduced; and subsequent to the anion exchange process, bringing the contaminated water into contact with zero valent nanoparticles to remove at least some of the heavy metal from the water.
摘要:
Disclosed herein are methods for transferring a graphene film onto a substrate, the methods comprising applying a polymer layer to a first surface of a graphene film, wherein a second surface of the graphene film is in contact with a growth substrate; applying a thermal release polymer layer to the polymer layer; removing the growth substrate to form a transfer substrate comprising an exposed graphene surface; and contacting the exposed graphene surface with a target substrate. Transfer substrates comprising a graphene film, a thermal release polymer layer, and a polymer layer are also disclosed herein.
摘要:
Disclosed herein are methods for transferring a graphene film onto a substrate, the methods comprising applying a polymer layer to a first surface of a graphene film, wherein a second surface of the graphene film is in contact with a growth substrate; applying a thermal release polymer layer to the polymer layer; removing the growth substrate to form a transfer substrate comprising an exposed graphene surface; and contacting the exposed graphene surface with a target substrate. Transfer substrates comprising a graphene film, a thermal release polymer layer, and a polymer layer are also disclosed herein.
摘要:
Methods for making activated carbon-supported transition metal-based nanoparticles include (a) impregnated activated carbon with at least one transition metal-containing compound, and (b) heating the impregnated activated carbon at a temperature and for a time sufficient to carbothermally reduce the transition metal-containing compound. Also disclosed are activated carbon-supported transition metal-based nanoparticles produced by such methods. Further disclosed are methods for treating water and waste streams that include contacting the water or waste streams with the activated carbon-supported transition metal-based nanoparticles.
摘要:
A method of making a filter article having a honeycomb substrate having adsorbent filled channels, including: sealing the first end of a porous, cellular honeycomb substrate; filling the channels of the cellular honeycomb substrate with a dry adsorbent source material; sealing the second end of the filled honeycomb to form a sealed honeycomb; contacting the sealed honeycomb and water for a time sufficient to convert the dry precursor material in-situ to a paste; removing the seals from the first and second ends; and heating the contacted honeycomb to convert the paste to an adsorbent. Also disclosed is a filter article having a honeycomb substrate having adsorbent filled channels and methods of using the article.
摘要:
Described herein are methods of making metallic or elemental silver in the solid state. These methods generally include a step of forming an at least substantially solvent-free solid state reaction mixture that includes a silver-containing compound and an organic acid, followed by heating the reaction mixture at a temperature and for a time effective to form metallic silver from a cationic silver species of the silver-containing compound. Also described herein are metallic or elemental silver produced by these methods.
摘要:
Described herein are methods of making metallic or elemental silver. These methods generally include a step of forming a reaction dispersion that includes a silver-containing compound, an organic acid, and a solvent that includes an alcohol, followed by mixing the reaction dispersion for a time and at a temperature effective to form a reaction product that includes metallic silver from a cationic silver species of the silver-containing compound. Also described herein are metallic or elemental silver produced by these methods.