Iron-containing mixed-phase metal oxides are described. The mixed-phase metal oxides can exhibit electrocatalytic and/or photo-electrocatalytic activity towards reducing reactions, such as the reduction of carbon dioxide.

Titania is a semiconductor and photocatalyst that is also chemically inert. With its bandgap of 3.2 and greater, to activate the photocatalytic property of titania requires light of about 390 nm wavelength, which is in the ultra-violet, where sunlight is very low in intensity. A method and devices are disclosed wherein stress is induced and managed in a thin film of titania in order to shift and lower the bandgap energy into the longer wavelengths that are more abundant in sunlight. Applications of this stress-induced bandgap-shifted titania photocatalytic surface include photoelectrolysis for production of hydrogen gas from water, photovoltaics for production of electricity, and photocatalysis for detoxification and disinfection.

An object of the present disclosure is to provide a structured photocatalyst that can effectively prevent aggregation of photocatalyst particles and maintain favorable photocatalytic functionality over a long period of time. A structured photocatalyst including a support of porous structure including a zeolite-type compound and at least one photocatalytic substance present in the support, the support including channels connecting with each other, and the photocatalytic substance including metal oxide nanoparticles and being present at least at the channels of the support.

A preparation method of carbon nitride modified with perylenetetracarboxylic dianhydride/graphene oxide aerogel composite material includes: (1) preparing carbon nitride nanosheets by calcination using dicyandiamide as raw material; (2) reacting perylenetetracarboxylic dianhydride and carbon nitride nanosheets in imidazole to prepare carbon nitride modified with perylenetetracarboxylic dianhydride; (3) dispersing said carbon nitride modified with perylenetetracarboxylic dianhydride and graphene oxide into deionized water, freeze-drying after the reaction to obtain carbon nitride modified with perylenetetracarboxylic dianhydride/graphene oxide aerogel composite material.

The present disclosure provides compositions and methods for metathesizing a first alkenyl or alkynyl group with a second alkenyl or alkynyl group, the composition comprising a ruthenium metathesis catalyst and a photoredox catalyst that is activated by visible light.

The invention discloses environment-controlling fibers and fabrics using the same, which adopts polyolefin material, optoelectronic material, thermoelectric material, piezoelectric material and catalyst material, to make fibers and fabric by melting, mixing, drawing and weaving. The fabrics are used in all kinds of environmental control products or for organic agriculture. To use green energy such as solar light energy, solar thermal energy, wind energy, hydro energy, geothermal energy and other renewable energy to stimulate the function of the special material within the fibers, so that the fabrics can remove pollutants in the environment and produce self-purification function to achieve the purpose of improving the environmental conditions or promote plant growth.

Methods of synthesizing Bi.sub.2S.sub.3CdS particles in the form of spheres as well as properties of these Bi.sub.2S.sub.3CdS particles are described. Methods of photocatalytic degradation of organic pollutants employing these Bi.sub.2S.sub.3CdS particles and methods of preventing or reducing microbial growth on a surface by applying these Bi.sub.2S.sub.3CdS particles in the form of a solution or an antimicrobial product onto the surface are also specified.

Monolithic composite photocatalysts for fluid purification, chemical transformations, and surface sterilization are disclosed. The monolithic composite photocatalysts comprise a photoactive nanocrystal component and a non-photoactive porous support. Photocatalytic fluid purification systems that contact an impurity-containing fluid with the subject monolithic composite photocatalysts are also disclosed.

Catalysts, catalytic systems and related synthetic methods for in situ production of H.sub.2O.sub.2 and use thereof in reaction with oxidizable substrates.

A photocatalytic filter according to an embodiment includes: a plurality of weft threads each of which includes a plurality of fibers extending in a first direction; a plurality of warp threads each of which includes a plurality of fibers extending in a second direction intersecting the first direction; and photocatalysts which are carried by the plurality of weft threads and the plurality of warp threads. At least two warp threads sandwiches at least one weft thread or at least two weft threads sandwiches at least one warp thread at the intersection portion between the weft thread and the warp thread.