TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred System: In the photoelectric system, the semiconductor and phosphorescent compounds are configured so that, upon excitation, the phosphorescent compound emits photons with wavelengths that create electron-hole pairs in the semiconductor that react with any water, water vapor, oxygen, carbon dioxide or organic materials in contact with the semiconductor to generate free radicals and other reactive species. The semiconductor and phosphorescent compounds are configured for the photo-generation of an electric current. The lower energy photons comprise photons with an energy level of about 2.0 eV or less. The phosphorescent compound is excited by IR wavelength photons. The phosphorescent compound is an up-converting phosphor comprising a host compound doped with one or more rare earth elements. The host compound is a halide selected from sodium yttrium tetrafluoride (NaYF4), yttrium trifluoride (YF3) and lanthanum trifluoride (LaF3). The rare earth elements are selected from ytterbium (Yb), thulium (Tm), erbium (Er) and gadolinium (Gd). The phosphorescent compound comprises a set of rare earth elements or one or more compounds comprising one or more rare earth elements. The upconverting phosphor is selected from NaYF4:Yb-Tm, sodium gadolinium tetrafluoride (NaGdF4):Yb-Tm LaF3:Yb-Tm, YF3:Yb-Tm, gadolinium trifluoride (GdF3):Yb-Tm, YF3:Yb-Gd-Tm and sodium yttrium tetrafluoride (NaYF4):Yb-Er. The semiconductor is selected from anatase titanium dioxide (TiO2), rutile TiO2, cerium oxide (CeO2), zinc oxide (ZnO), iron oxide (Fe2O3), tungsten oxide (WO3), tantalum oxide (Ta2O5), vanadium oxide (VO2), ternary and quaternary metal oxides, metal sulfides, nitrides, oxynitrides, oxysulfides and mixtures. The ternary and quaternary metal oxides are selected from K4Nb6O17, HCa2Nb3O10, KCa2Nb3O10, K4Ce2Ta10O30, K4Ce2Nb10O30, LiTaO3, NaTaO3, KTaO3, SrTiO3, Sr3Ti2O7, La2Ti2O7, NaTi2O4(OH)2, K2La2Ti3O10, K4Ce2Ta10O30 and K4Ce2Nb10O30. The metal sulfides are selected from zinc sulfide (ZnS), cadmium sulfide (CdS) and CdxZn1-xS. The semiconductor comprises a set of semiconductor compounds, where the semiconductor is the anatase or rutile polymorph of titanium dioxide. The semiconductor is coated as a shell layer covering a phosphorescent compound core. The particle morphology of the phosphorescent compound core is selected from spheres, platelets, prisms, rods, fibers and cubes. The photoelectric system comprises a mixture of semiconductor and phosphorescent compound particles having similar aspect ratios in either an ordered or disordered arrangement. The particle morphologies of the semiconductor and phosphorescent compound particles are independently selected from spheres, rods, tubes, prisms, platelets, fibers and cubes. The mixture of particles are dispersed in an external liquid or gas matrix or supported on a porous solid matrix. The photoelectric system comprises a mixture of semiconductor and phosphorescent compound particles, characterized by the semiconductor particle morphologies being different from the phosphorescent compound particle morphologies. The spherical phosphorescent compound particles are mixed with semiconductor particles having a morphology selected from rods, fibers, tubes and mixtures. Moreover, the photoelectric system comprises a mixture of semiconductor and phosphorescent particles having a fibrous or tubular morphology where the particles are arranged in an ordered configuration. The semiconductor and phosphorescent compound comprise particles characterized by morphologies independently selected from cubes, rectangular solids, cuboids, prisms, discs, pyramids, polyhedrons, multi-faceted particles, cylinders, spheres, cones, rings, tubes, acicular, angular, bent, channeled, concave, crescent, columnar, dendritic, equant, euhedral, fibrous, flaked, flattened, fractal, glass-like, grape-like, granular, irregular, layered, long-thin, lumpy, lath, modular, needle, oblong, plate, platelet, potato, ribbon, rippled, rod, rounded, shard, sheet, smoothed, eraser, burrito, Africa, jelly fish, worm, subhedral, striated, subangular, subsphere and twisted. The particles are dispersed in a liquid or gas matrix or supported on a porous or non-porous solid matrix. The photoelectric system is characterized by an interpenetrating fiber network of phosphorescent compound fibers and semiconductor fibers, where the fibers are spun together with cotton or nylon fibers. The phosphorescent compound is embedded within a continuous matrix of the semiconductor. The semiconductor matrix comprises particles with a morphology selected from spheres, cubes, rods, tubes, prisms, films and sheets. The photoelectric system comprises a continuous bi-layer of the semiconductor is coated onto a film or sheet of the phosphorescent compound. Also, the photoelectric system is characterized by a multilayer structure comprising a set of the bi-layers, or by a cellular or monolithic macro structure, where the cellular macrostructure is a foam, a honeycomb, or a corrugated macrostructure. The cellular macrostructure comprises interconnected rods, and interconnected fibers defining a ceramic fiber mat. The cellular macrostructure is characterized by a low density closed cell structure. Preferred Method: In remediating chemical waste, the organic species are volatile or non-volatile. In cleaning and sterilizing surfaces, the phosphorescent compound is a rare earth doped upconverting phosphor that upon excitation with IR wavelength photons emits photons of sufficient energy to activate the semiconductor, and the surface is the surface of an implantable medical device. The phosphorescent compound is a rare earth doped upconverting phosphor that upon excitation with IR wavelength photons emits photons of sufficient energy to activate the semiconductor, and the surface is an outside exterior surface. The source of photons for exciting the phosphorescent compound is the sun or an IR illuminator, where the IR illuminator is a lamp or photodiode. In producing hydrogen or the hydrocarbon fuel, the hydrogen source is water or methanol. The hydrocarbon fuel source is biomass or carbon dioxide and the hydrocarbon fuel is methane, methanol or formaldehyde. ACTIVITY - Cytostatic; Antimicrobial; Virucide; Antibacterial; Fungicide; Antiallergic; Antiparasitic; Cerebroprotective; Immunosuppressive; Antiinflammatory. No biological data given.    MECHANISM OF ACTION - None given.