A visible-light-photocatalyzed composite light-transmitting concrete contains several bundles of optical fibers, the optical fibers are coated with a protective layer on their outer surface, the protective layer contains a visible light photocatalyst, and the concrete has several gas-permeable pores. Such concrete is prepared by mixing a visible light photocatalyst and a light-transmitting glue, applying the mixture to the surface of optical fibers to form a protective layer, and using optical fibers in the concrete. The resulting concrete has dual properties of light transmittance and photocatalytic oxidation of gas-phase pollutants under visible light irradiation. The visible-light-photocatalyzed composite light-transmitting concrete significantly breaks through the limitation of photocatalytic concrete to light sources, so that gas-phase pollutants can be removed under visible light irradiation through photocatalysis of light-transmitting concrete. It also has good mechanical properties, decorativeness, and functional practicability due to coated optical fibers.

A compound capable of coordinating with a metal includes a chemical structure as shown in claim 1, in which: EPD represents a group having an electron pair donor atom; B and B′ are each independently an aryl group, a heteroaryl group, an alkenyl group, or alkynyl group, or B and B′ form a spirocyclic group; and R.sub.1, R.sub.2, and R.sub.3 are selected from various substituents.

A method for making organo-metal material involves providing a metal ion source in a medium that removes metal ions from the source and forms 1D metal-containing coordination polymers that self-assemble and precipitate as at least one of a 2D and 3D coordination polymer material that can be thermally treated to produce a porous metal oxide material.

A visible-light-photocatalyzed composite light-transmitting concrete contains several bundles of optical fibers, the optical fibers are coated with a protective layer on their outer surface, the protective layer contains a visible light photocatalyst, and the concrete has several gas-permeable pores. Such concrete is prepared by mixing a visible light photocatalyst and a light-transmitting glue, applying the mixture to the surface of optical fibers to form a protective layer, and using optical fibers in the concrete. The resulting concrete has dual properties of light transmittance and photocatalytic oxidation of gas-phase pollutants under visible light irradiation. The visible-light-photocatalyzed composite light-transmitting concrete significantly breaks through the limitation of photocatalytic concrete to light sources, so that gas-phase pollutants can be removed under visible light irradiation through photocatalysis of light-transmitting concrete. It also has good mechanical properties, decorativeness, and functional practicability due to coated optical fibers.

Disclosed herein are methods for reprocessing polyurethane compositions such as polyurethane foams. The method comprises introducing a polyurethane composition into a compounding device, heating the polyurethane composition to an effective bond-exchange temperature, and compounding the polyurethane composition for an effective bond-exchange time.

SiOC-bonded polyether siloxanes are produced by transesterification of alkoxysiloxanes with polyetherols in the presence of trifluoromethanesulfonate as catalyst. The computational total water content of the reactants including alkoxysiloxanes and polyetherols is ≤5000 ppm by mass, advantageously ≤300 ppm by mass, preferably ≤150 ppm by mass, more preferably ≤100 ppm by mass, in particular ≤50 ppm by mass. The determination of the individual water contents is performed beforehand, preferably by titration according to Karl Fischer.

The invention relates to a photocatalytic oil-water separation material and a preparation method thereof, the method including the following steps: cleaning a base material and a metal-doped material, and drying for later use; preparing a mixed solution of an amine monomer and an acid-alkali buffer reagent, soaking the base material in the mixed solution, and reacting under an oscillation condition, to obtain the base material attached with amine monomer polymer; dissolving a soluble metal additive and an organic ligand reagent into an organic solvent, and performing ultrasonic stirring uniformly, to obtain a metal organic framework material (MOF) reaction solution with photocatalytic performance; and placing the metal-doped material, the base material attached with the amine and the MOF reaction solution into a reaction kettle for performing hydrothermal reaction, cleaning and drying the reacted base material, to obtain the photocatalytic oil-water separation material.

Described herein is a bismuth-containing catalyser, which is defined by a general formula (I). The bismuth-containing catalyser includes at least one radical R1, which includes a carboxyl fragment according to the general formula (II), where a first carbon atom (α-carbon) is bonded to the carbon atom of the carboxyl group, which in turn is directly substituted with at least one aromatic system. Also described herein is a method for preparing the bismuth-containing catalyser and a method of using the bismuth-containing catalyser for preparing compounds including a urethane group.

The invention relates to a photocatalytic oil-water separation material and a preparation method thereof, the method including the following steps: cleaning a base material and a metal-doped material, and drying for later use; preparing a mixed solution of an amine monomer and an acid-alkali buffer reagent, soaking the base material in the mixed solution, and reacting under an oscillation condition, to obtain the base material attached with amine monomer polymer; dissolving a soluble metal additive and an organic ligand reagent into an organic solvent, and performing ultrasonic stirring uniformly, to obtain a metal organic framework material (MOF) reaction solution with photocatalytic performance; and placing the metal-doped material, the base material attached with the amine and the MOF reaction solution into a reaction kettle for performing hydrothermal reaction, cleaning and drying the reacted base material, to obtain the photocatalytic oil-water separation material.

Provided is a method for producing water-absorbent resin particles, which is capable of improving the gel strength for the purpose of achieving a good balance between the absorption under load and the rate of liquid permeation through gel. The present invention is a method for producing water-absorbent resin particles, which is characterized by comprising a step wherein a monomer composition containing a water-soluble vinyl monomer (a1) and/or a vinyl monomer (a2) that turns into a water-soluble vinyl monomer (a1) by means of hydrolysis and a crosslinking agent (b) is polymerized in the presence of at least one organic main group element compound selected from the group consisting of organic iodine compounds, organic tellurium compounds, organic antimony compounds, and organic bismuth compounds.