A solid heat carrier catalyst for thermal desorption of organic matter-contaminated soil and a method for preparing the same. A hollow alumina ball prepared by 3D printing is taken as a solid heat carrier, copper-nickel-vanadium composite oxide is taken as a catalytic active component, and vinyltriethoxysilane is taken as a masking agent. The ball has a diameter of 30 mm to 60 mm and a thickness of 1 mm to 2 mm. An outer surface of the ball is masked with the vinyltriethoxysilane; then the ball is pierced to make an inner surface thereof connected with the outside through channels; the ball is then immersed in a catalytic active component precursor solution; and finally, drying and calcination are performed to obtain the solid heat carrier catalyst for thermal desorption of organic matter-contaminated soil. This product is widely applicable to the field of thermal desorption of organic contaminants of soil.

The present invention provides zeolite hollow spheres in which zeolite crystals grow to form a framework of macropore through a hydrothermal crystallization process using the hydrophilic surface of a carbon sphere as a hard template, wherein the zeolite framework is an ordered, porous crystalline zeolite material with a number of channels or pores interconnected, which has pore structures including mesopores and micropores. The zeolite hollow spheres of the present invention can be used for various purposes such as catalysts and adsorbents.

The present disclosure relates to an amorphous catalyst composite, including an amorphous isotropic carbon compound with a carbon defect and a nanoparticle, and a method of preparing the same.

The present disclosure relates to an amorphous catalyst composite, including an amorphous isotropic carbon compound with a carbon defect and a nanoparticle, and a method of preparing the same.

The invention discloses a composite material used for catalyzing and degrading nitrogen oxide and its preparation method and application thereof. The invention of the hollow g-C.sub.3N.sub.4 nanospheres/reduced graphene oxide composite-polymer carbonized nanofiber material is prepared as follow: 1) the preparation of silica nanospheres; 2) the preparation of hollow g-C.sub.3N.sub.4 nanospheres; 3) the preparation of graphene oxide; 4) the preparation of surface modified hollow g-C.sub.3N.sub.4 nanoparticles preparation; 5) the preparation of composites; 6) the preparation of composite-polymer carbon nanofiber material. The raw materials used in the process is low cost and easy to get; the operation of the invention is simple and convenient without the use of expensive equipment in the whole process; the composite has high adsorption efficiency of ppb level nitrogen oxide with good repeatability.

The present specification relates to hollow metal nanoparticles, a catalyst including the same, and a method for manufacturing hollow metal nanoparticles.

A single atom catalyst and a method of forming the same are provided. The single atom catalyst comprises a support comprising a first metal oxide and a second metal atom located in the first metal oxide. The method of forming the single atom catalyst comprises forming a sacrificial nanoparticle, coating the sacrificial nanoparticle with a first metal oxide, adsorbing a second metal atom to the first metal oxide, forming a sacrificial layer on the support, and heating the first metal oxide.

The present invention belongs to the field of new material technology and relates to a bismuth/bismuth titanate heterojunction hollow nanospheres and methods for preparing the same and applications thereof. The bismuth/bismuth titanate heterojunction hollow nanospheres is obtained by adding a bismuth salt and tetrabutyl titanate into an organic solvent, mixing evenly, adding an inorganic alkali solution to generate a precipitation, then sequentially adding an organic amine and an organic acid, performing a solvothermal treatment to obtain bismuth titanate hollow nanospheres, and then thermally reducing the bismuth titanate hollow nanospheres with a borohydride under an inert atmosphere. The bismuth/bismuth titanate heterojunction hollow nanospheres provided not only exhibit significant photocatalytic activity in degrading tetracycline hydrochloride but also enable a tighter binding of the metal to the photocatalytic material, thus offering superior structural stability.

The present invention belongs to the field of new material technology and relates to a bismuth/bismuth titanate heterojunction hollow nanospheres and methods for preparing the same and applications thereof. The bismuth/bismuth titanate heterojunction hollow nanospheres is obtained by adding a bismuth salt and tetrabutyl titanate into an organic solvent, mixing evenly, adding an inorganic alkali solution to generate a precipitation, then sequentially adding an organic amine and an organic acid, performing a solvothermal treatment to obtain bismuth titanate hollow nanospheres, and then thermally reducing the bismuth titanate hollow nanospheres with a borohydride under an inert atmosphere. The bismuth/bismuth titanate heterojunction hollow nanospheres provided not only exhibit significant photocatalytic activity in degrading tetracycline hydrochloride but also enable a tighter binding of the metal to the photocatalytic material, thus offering superior structural stability.

The present inventive concept relates to a method of manufacturing a porous silica support and a catalyst for a dry methane reforming reaction comprising the porous silica manufactured thereby. According to the present inventive concept, a porous silica support having a variety of controlled pore structures and silica shapes and having hydroxyl groups (OH) formed on the surface thereof may be manufactured by controlling the mixing molar ratio of two alkoxysilanes (APTES and TEOS) used as silica precursors. In the catalyst in which an active metal is supported on the porous silica support, the active metal strongly interacts with silica through the hydroxyl groups, thereby enhancing catalytic activity, promoting dissociation/adsorption of CO.sub.2, and alleviating carbon formation. Therefore, the catalytic activity is enhanced compared to a conventional catalyst in which an active metal is supported on silica having single mesopores and containing no hydroxyl groups in a dry methane reforming reaction.