摘要:
A process is disclosed comprising, providing a source of graphene, providing a particulate material, dispersing a mixture of the source of graphene and the particulate material in a first dispersion fluid to form a dispersion mixture, and providing a source of a base in the first dispersion fluid, thereby causing the source of graphene and particulate material in the dispersion mixture to interact forming a composite. The particulate materials is preferably titanium dioxide comprising anatase and/or rutile which provides an effective photocatalytic composite. Also disclosed is apparatus to remove pollutants from fluids using the photocatalytically active material.
摘要:
There is provided a process for preparing a cerium-zirconium metal organic framework (Ce/Zr-MOF), the process comprising the steps (i) preparing a reaction mixture comprising zirconium (IV) ions, cerium (IV) ions, a carboxylic acid, and at least one organic linker compound in a solvent; and (ii) heating the reaction mixture from step (i), wherein, when the organic linker comprises a carboxylate functional group, said organic linker is different to the carboxylic acid.
摘要:
Embodiments are directed to carbon nitride materials that provide appropriate characteristics for photocatalytic water splitting. The carbon nitride materials have a three dimensional CN material with a high nitrogen content that is stable under photocatalytic conditions. A method of producing a photocatalytic CN material comprises (a) contacting a mesoporous template having a selected porosity with an aminoguanidine hydrochloride solution, forming a template reactant mixture; and (b) heating the template reactant mixture, forming a carbon nitride material/template composite; (c) heating the CN/template composite in an inert gas atmosphere to about 350 °C to 450 °C, forming a cubic mesoporous carbon nitride material/template complex; and (d) removing the template from the mesoporous carbon nitride material/ template complex. The carbon nitrogen matrix is a based on C3N6diamino-s-tetrazine.
摘要:
The present invention concerns a chemical process for preparing nanoparticles of an alloy comprising both a noble metal, such as platinum, and a non-noble transition or lanthanide metal, such as yttrium, gadolinium or terbium. The process is carried out by reduction with hydrogen and removal of volatile species in gas form at the reaction temperature.
摘要:
The present invention relates to a method of coating a plurality of solid supports with a photocatalyst, the method comprising: dry mixing the solid supports with particulate photocatalyst in a rotating processing vessel.
摘要:
The invention relates to a process for preparing a porous material comprising metal, metalloid, or non-metal precursor, said process comprising the steps of: - dispersing the porous material in a hydrophobic solvent; - adding a metal, metalloid, or non-metal precursor solution in a hydrophilic solvent to the dispersed porous material and the hydrophobic solvent, thereby forming a mixture; and - selectively removing the hydrophilic solvent from the mixture; thereby impregnating the porous material with the metal, metalloid, or non-metal precursor solution; thereby preparing a porous material comprising metal, metalloid, or non-metal precursor. The process may additionally comprise a step of converting the precursor, and a step of removing the porous material. Also described is a nanostructured metal, metalloid, or non-metal decomposition product; or metal, metalloid, or non-metal; or metal, metalloid, or non-metal oxide. ln a preferred embodiment, nanostructured bismuth is prepared using mesoporous silica or mesoporous titania as the porous material, viz. template.
摘要:
This invention relates to azirconium solution or sol comprising:(a) zirconium,(b) nitrate, acetate and/or chloride ions, and(c) one or more complexing agents being an organic compound comprising at least one of the following functional groups: an amine, an organosulphate, a sulphonate, a hydroxyl, an etheror a carboxylic acid group,wherein the molar ratio of components (a):(b) is 1:0.7to 1:4.0,the molar ratio of components (a):(c) is 1:0.0005 to 1:0.1, and thepH of the zirconium solution or sol is less than 5. The invention also relates to a process for preparing a zirconium solution or sol, the process comprising the steps of:(a)dissolving a zirconium salt in nitric, acetic and/or hydrochloric acid, and(b)adding one or more complexing agents to the resulting solution, the one or more complexing agents being an organic compound comprising at least one of the following functional groups: an amine, an organosulphate, a sulphonate, a hydroxyl, an etheror a carboxylic acid group, and (c)heating the solutionor solto a temperature of at least 75°C. In addition, the invention relates to products formed from the zirconium solution or solor obtainable by the process.
摘要:
According to one or more embodiments, cationic polymers may be produced which include one or more monomers containing cations. Such cationic polymers may be utilized as structure directing agents to form mesoporous zeolites. The mesoporous zeolites may include micropores as well as mesopores, and may have a surface area of greater than 350 m 2 /g and a pore volume of greater than 0.3 cm 3 /g. Also described are core/shell zeolites, where at least the shell portion includes a mesoporous zeolite material.
摘要:
本发明涉及一种用于蓖麻油制备生物航空煤油的加氢异构和裂化催化剂与制备方法和应用。由Al改性的钛硅分子筛(TS-1)为载体,以Ni x W、Ni x Mo为活性组分,其中x为Ni与W或Ni与Mo的原子比,x=5-10,其中,活性组分的质量占催化剂总质量的5-30%;所述的Al改性的钛硅分子筛中的Si:Ti的摩尔比为50-100,Si:Al的摩尔比为50-100。负载活性组分时以尿素作为分散剂,使得活性组分的前体可以超高度分散在载体的表面,后续的高温焙烧过程尿素会被分解脱除,同时催化剂的粒径受到分散剂的阻碍,不会造成高温下的烧结,会使得催化剂中金属组分的粒径更小且均匀,从而提高催化效率。利用本发明可以得到高产率的生物航空煤油。