TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The hollow microsphere has a diameter of 1-200 mu m. The nanofilaments are comprised of a material consisting of metal oxide, metal sulfide, carbon and/or polymer. The nanofilaments are aligned randomly. The nanofilaments are nanofibers, nanowires and/or nanotubes. The pores are macropores and/or mesopores. The pores are: macropores with a diameter of 50-200 nm or mesopores with a diameter of 2-50 nm. The microspheres have a diameter of 2-10 mu m. The nanofilaments have a diameter of 10-500 nm, preferably 20-100 nm. In the hollow microsphere, at least one metal oxide or metal sulfide is a photocatalytic material. The metal oxide is titanium dioxide (TiO2), silicon dioxide (SiO2), zinc oxide (ZnO), ferric oxide (Fe2O3), tungsten oxide (W2O3), strontium titanate (SrTiO3), nickel ferrite (NiFe2O4), ferrous oxide (Fe3O4), lead zirconate titanate (Pb(Zr0.52Ti0.48)O3), magnesium titanate (MgTiO3), nickel-titanium oxide (NiTiO3), aluminum borate (Al2O3-B2O3), cerium oxide, zirconium oxide, alumina, germanium dioxide (GeO2), manganese oxide (Mn2O3-Mn3O4), lead zirconium titanate (Pb(Zr, Ti)O3), cobalt oxide (Co3O4), neobium pentoxide (Nb2O5), nickel oxide (NiO)/ZnO, polyvinyl pyrrolidone-TiO2, tin oxide (SnO2), lanthanum cuprate (La2CuO4) and/or barium titanate (BaTiO3). The metal sulfide is cadmium sulfide (CdS), indium trisulfide (In2S3) or zinc sulfide (ZnS). The photocatalytic material is TiO2, which is in anatase and/or rutil phase. The nanofilaments are manufactured by a method consisting of hydrothermal reaction (preferred), electrospinning or sol-gel. The surfactant is amphoteric surfactants, anionic surfactants, cationic surfactants and/or nonionic surfactants. The anionic surfactant is sodium dodecyl sulfate, sodium pentane sulfonate, dehydrocholic acid, glycolithocholic acid ethyl ester, ammonium lauryl sulfate and other alkyl sulfate salts, sodium laureth sulfate, alkyl benzene sulfonate, soaps and/or fatty acid salts. The nonionic surfactant is poloxamers, alkyl poly(ethylene oxide), diethylene glycol monohexyl ether, copolymers of poly(ethylene oxide) and poly(propylene oxide), hexaethylene glycol monohexadecyl ether, alkyl polyglucosides, digitonin, ethylene glycol monodecyl ether, cocamide monoethanolamine, cocamide diethanolamine, cocamide triethanolamine and/or fatty alcohols (preferably poloxamer or a mixture of different poloxamers). The cationic surfactant is cetyl trimethylammonium bromide, dodecylethyldimethylammonium bromide, cetylpyridinium chloride, polyethoxylated tallow amine, hexadecyltrimethylammonium para-toluenesulfonate, benzalkonium chloride and/or benzethonium chloride. The amphoteric surfactant is dodecyl betaine, sodium 2,3-dimercaptopropanesulfonate monohydrate, dodecyl dimethylamine oxide, cocamidopropyl betaine, 3-(N,N-dimethyl(3-palmitoylaminopropyl)ammonio)-propanesulfonate and/or coco amphoglycinate. Preferred Process: The manufacturing process further comprises a step of drying and/or calcinating after spray drying. In the method, the suspension comprises 2-10 (preferably 4-8) g/l of the nanoparticles. The calcination is carried out at 300-700 degrees C. In the method, the concentration of the surfactant is 0.05-0.2 wt.% based on the total weight of the resulting suspension; and the concentration of the surfactant is 0.1 wt.% based on the total weight of the resulting suspension.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer is 1,1,1,3,3,3-hexafluoroisopropanol, poly(urethanes), poly(siloxanes), poly(silicones), poly(ethylene), poly(vinyl pyrrolidone), polyaniline/polyethylene oxide blends, poly(2-hydroxy ethyl methacrylate), poly(N-vinyl pyrrolidone), poly(methyl methacrylate), poly(vinyl alcohol), poly(acrylic acid), poly(vinyl acetate), polyacrylamide, poly(ethylene-co-vinyl acetate), poly(ethylene glycol), poly(methacrylic acid), polylactic acid, polyglycolic acids, poly(lactide-co-glycolides), nylons, polyamides, polyanhydrides, poly(ethylene-co-vinyl alcohol), polycaprolactone, poly(vinyl acetate), polyvinylhydroxide, poly(ethylene oxide) and/or polyorthoesters. The polymer is collagen, poly(alpha esters) such as poly(lactate acid), poly(glycolic acid), polyorthoesters, polyanhydrides; cellulose ether, cellulose acetate, cellulose, cellulose ester, chitosan, gelatin, fluorinated polyethylene, poly-4-methylpentene, polyacrylonitrile, polyamide, polyamideimide, polyacrylate, polybenzoxazole, polycarbonate, polycyanoarylether, polyester, polyestercarbonate, polyether, polyetheretherketone, polyetherimide, polyetherketone, polyethersulfone, polyethylene, polyfluoroolefin, polyimide, polyolefin, polyoxadiazole, polyphenylene oxide, polyphenylene sulfide, polypropylene, polystyrene, polysulfide, polysulfone, polytetrafluoroethylene, polythioether, polytriazole, polyurethane, polyvinyl, polyvinylidene fluoride, regenerated cellulose, silicone, urea-formaldehyde and copolymers or their physical blends. EXAMPLE - Titanium dioxide powder was mixed with 10M sodium hydroxide in a Teflon (RTM: Polytetrafluoroethylene)-lined autoclave container and placed in the oven at 180 degrees C for 2 days to undergo hydrothermal reaction. The white pulp like product in the autoclave was washed with 0.1M hydrochloric acid, with the assistance of ultrasound. Subsequently, pH was neutralized by repeated washing with deionized water. The synthesized nanowire powder was added into aqueous solution of surfactant to obtain titanium dioxide suspension feed for spray-drying. The suspension was sprayed using a spray dryer to produce primary nanowire microsphere. The temperature of the gas for drying the titanium dioxide suspension that was expelled into the evaporation tube of the spray dryer was 190 degrees C. The pressure with which the titanium dioxide suspension was dispensed into the evaporation tube was 10 kPa. The blower flow rate was 0.7 m/minute while the feed flow rate was 8 ml/minute. After collecting the hollow titanium dioxide microspheres exiting the spray dryer through the cyclone, the nanowire microspheres were calcined at 600 degrees C for 2 hours with a heating ramp of 2 degrees C/minute to obtain the final titanium dioxide nanowire microspheres.