NOVELTY - A solar terrestrial light absorbing composite comprises: a chemically-stable catalytic oxide structure; and solar terrestrial light absorbing conductive metallic oxide structure positioned in contact with the chemically-stable catalytic oxide, where absorption of electromagnetic radiation by the solar terrestrial light absorbing conductive metallic oxide structure forms charge carriers in the solar terrestrial light absorbing conductive metallic oxide structure that are transferred to the chemically-stable catalytic oxide structure.    USE - For creating hot-carriers; for generating photocurrent or a photovoltage; for photocatalytically oxidizing, reducing or producing radical species from a substance (all claimed); for absorption of visible or solar terrestrial electromagnetic radiation; in photovoltaic and photocatalytic applications; in a gas separation process, such as in a carbon sequestration process, in a high efficiency gas turbine or in a fuel cell.    ADVANTAGE - The composite converts absorbed visible or solar terrestrial electromagnetic radiation into useful work, such as for photocatalytic or photovoltaic applications; provides better utilization of the visible region of the electromagnetic spectrum, including enhances the absorption by the semiconducting materials through use of light absorbing dyes and quantum dot technology. The composite exhibits excellent stability. The oxide materials are stable when exposed to oxidizing environments, such as air and water. Little or no degradation to the materials occurs during the formation and processing of the material due to exposure to air. This provides a substantial enhancement over traditional materials where oxygen is an undesirable component e.g. because the formation of insulating oxide layers over active photocatalyst or photovoltaic materials, such as silicon, when exposed to air can degrade, diminish or otherwise render the photocatalyst or photovoltaic materials useless without additional processing or refinement. The oxide composite are stable and exhibit no or only minimal diffusion when placed at an interface. The use of the solar terrestrial absorbing composites provides benefits by increasing the availability of low cost and low energy separation routes that would otherwise require substantial energy input, via mechanical energy, electrical energy or high energy electromagnetic radiation, such as ultraviolet electromagnetic radiation. The solar terrestrial light absorbing conductive metallic oxide structure absorbs visible or solar terrestrial electromagnetic radiation to activate the photocatalytic material.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) creating hot-carriers involving: providing a solar terrestrial light absorbing composite comprising: a chemically-stable catalytic oxide structure; and a solar terrestrial light absorbing conductive metallic oxide structure positioned in contact with the chemically-stable catalytic oxide structure; exposing the solar terrestrial light absorbing composite to solar terrestrial electromagnetic radiation, where absorption of electromagnetic radiation by the solar terrestrial light absorbing conductive metallic oxide structure forms charge carriers in the solar terrestrial light absorbing conductive metallic oxide structure that are transferred to the chemically-stable catalytic oxide structure;    (2) generating (M2) a photocurrent or a photovoltage involving: providing a photovoltaic device comprising: substrate; solar terrestrial light absorbing conductive metallic oxide layer provided over at least a portion of the substrate; chemically-stable catalytic oxide layer provided over and in contact with at least a portion of the solar terrestrial light absorbing conductive metallic oxide layer; and a transparent conducting electrode layer provided over and in contact with at least a portion of the chemically-stable catalytic oxide layer; and exposing the photovoltaic device to solar terrestrial electromagnetic radiation, where absorption of electromagnetic radiation by the solar terrestrial light absorbing conductive metallic oxide layer forms charge carriers in the solar terrestrial light absorbing conductive metallic oxide layer that are transferred to the chemically-stable catalytic oxide layer, thus generating a photocurrent or photovoltage; and    (3) photocatalytically oxidizing, reducing or producing radical species from a substance involving: providing a photocatalytic material, where the photocatalytic material comprises: a chemically-stable catalytic oxide structure; and solar terrestrial light absorbing conductive metallic oxide structure positioned in contact with the chemically-stable catalytic oxide structure; contacting the photocatalytic material with the substance; exposing the photocatalytic material to solar terrestrial electromagnetic radiation, where absorption of electromagnetic radiation by the solar terrestrial light absorbing conductive metallic oxide structure forms charge carriers in the solar terrestrial light absorbing conductive metallic oxide structure that are transferred to the chemically-stable catalytic oxide structure; and oxidizing, reducing or producing radical species from at least a portion of the substance in contact with the photocatalytic material.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of Solar terrestrial light absorbing composite for creating hot carriers