The present disclosure belongs to the technical field of electrocatalytic materials, and provides a graphitic carbon-doped and mixed crystal-type titanium dioxide nanotube composite for electrocatalysis, and a preparation method and use thereof. The composite for electrocatalysis includes a titanium substrate and a titanium dioxide nanomesh deposited on the titanium substrate, where the titanium dioxide nanomesh is woven from titanium dioxide nanowires; the titanium dioxide nanowires include anatase-type titanium dioxide nanowires and rutile-type titanium dioxide nanowires. The mixed crystal-type titanium dioxide phase improves a catalytic activity of the composite for electrocatalysis; meanwhile, the titanium dioxide nanowires are further loaded with graphitic carbon particles to improve an overall conductivity of the composite for electrocatalysis. Therefore, the composite for electrocatalysis has a high electron mobility to achieve an improved electrocatalytic activity, which can be applied to the degradation of organic pollutants by electrocatalysis.

A method for preparing a porous nano-fiber heterostructure photocatalytic filter screen includes: preparing a noble metal nanostructure with tunable spectra and a heterostructure composite photocatalyst of a photocatalytic material; and preparing a large area and multilayer porous nano-fiber filter screen structure, while utilizing a scattering enhancement effect of metal nanoparticles in an porous optical fiber to realize repeated conduction of sunlight in the optical fiber and finally interact with the composite photocatalyst on a surface to improve photocatalytic efficiency. Preparation of the heterostructure composite photocatalyst with a wide spectral response of and tunable visible to infrared band spectra is realized, at the same time, with reference to high adsorbability, high light transmission of nanometer fiber and unique optical characteristics of metal nanoparticles, an air purification filter screen with a high sunlight utilization rate and a high catalytic degradation capability is creatively provided.

The problem of the present invention is to provide an exhaust gas purifying agent for automobiles which is capable of improving the automobile fuel mileage as well as purifying the exhaust gas of the automobiles, and further extending the effective duration of the exhaust gas purifying agent for automobiles by a simple method of spraying the exhaust gas purifying agent for automobiles using only natural ingredients on the air filter.

The problem of the present invention can be solved by using a liquid containing a) tourmaline fine powder, b) porous material fine powder, c) fucoidan extracted from seaweeds, d) amino peptides and/or alginic acids extracted from seaweeds in water as the exhaust as purifying agent for automobiles by spraying on the air filter of automobiles.

The present invention relates to an activated carbon having an electric conductivity of 3.5 S/cm or more obtained by powder resistance measurement under a load of 12 kN and an oxygen content of 3.0% by mass or more, and a metal-carrying activated carbon using the same, and the like.

A solid oxide fuel cell includes a cathode including a complex oxide having a perovskite structure expressed by the formula ABO.sub.3, an anode, and a solid electrolyte layer disposed between the cathode and the anode. The cathode includes phosphorus, chromium and boron, a content amount of the phosphorus in the cathode is at least 10 ppm and no more than 50 ppm, a content amount of the chromium in the cathode is at least 50 ppm and no more than 500 ppm, and a content amount of the boron in the cathode is at least 5 ppm and no more than 50 ppm.

A method of reducing an aromatic ring under relatively mild condition using sub-nano particles of a transition metal supported on super paramagnetic iron oxide nanoparticles (SPIONs). The catalyst is efficient for catalyzing the reduction of both carbocyclic and heterocyclic compound. In compound comprising both carbocyclic and heterocyclic aromatic rings, the catalyst displays high regioselectivity for the heterocyclic ring.

The present disclosure refers to increasing the catalytic efficiency of Weyl semimetals by subjecting Weyl semimetals to an external magnetic field of greater than 0 T, for example greater than 0.1 T. In a preferred embodiment of the present disclosure the Weyl semimetal is selected from the group consisting of NbP, TaP, NbAs and TaAs.

The invention relates to the recovery of heavy oil reservoirs, and more particularly to a supported catalyst-assisted microwave method for exploiting a heavy oil reservoir. The method includes: (1) injecting a slug of a supported catalyst fluid into the heavy oil reservoir; (2) placing a microwave generator in the heavy oil reservoir to perform volumetric heating on an oil layer containing the supported catalyst fluid; and (3) turning off the microwave generator and injecting water into the heavy oil reservoir for subsequent displacement, where a water injection rate is 3 m/d or less.

A method of enhancing a chemical reaction. The method includes providing catalyst particles with a predefined geometric shape having at least one of edges and points; and applying microwave energy to the catalyst particles, enhancing catalytic activity of the catalyst particles without increasing bulk temperature of surrounding reactants.

Disclosed is a catalyst for oxygen reduction and evolution reactions. The catalyst is in the form of nickel sulfide (NiS.sub.2) nanosheets. NiS.sub.2 molecules are cross-linked and oriented two-dimensionally in the NiS.sub.2 nanosheets. Also disclosed is a method for producing the catalyst.