Visible light responsive titanium dioxide nanowire/metal organic skeleton/carbon nanofiber membrane and preparation method and application thereof

A preparation method of a treated titanium dioxide nanowires/carbon nanofiber membrane, comprising the following steps:

• (1) preparing polyacrylonitrile nanofibers by electrospinning, and then carbonizing said polyacrylonitrile nanofibers under an inert atmosphere to obtain carbon nanofibers;
• (2) adding cetyltrimethyl ammonium bromide solution into tetramethylammonium titanate solution and stirring, adding ethylene glycol and urea, stirring to obtain a mixed solution;
• immersing said carbon nanofibers in the mixed solution and heating, after reaction, it is naturally cooled to room temperature to obtain a titanium dioxide nanowires/carbon nanofiber membrane;
• (3) immersing the titanium dioxide nanowires/carbon nanofiber membrane in ethanol, adding (3-aminopropyl)triethoxysilane and stirring at room temperature to obtain a treated titanium dioxide nanowires/carbon nanofiber membrane.

A method for photocatalytic degradation of exhaust gas, comprising the following steps:

• (1) preparing polyacrylonitrile nanofibers by electrospinning, and then carbonizing said polyacrylonitrile nanofibers under an inert atmosphere to obtain carbon nanofibers;
• (2) adding cetyltrimethyl ammonium bromide solution into tetramethylammonium titanate solution and stirring, adding ethylene glycol and urea, stirring to obtain a mixed solution;
• immersing said carbon nanofibers in the mixed solution and heating, after reaction, it is naturally cooled to room temperature to obtain a titanium dioxide nanowires/carbon nanofiber membrane;
• (3) immersing the titanium dioxide nanowires/carbon nanofiber membrane in ethanol, adding (3-aminopropyl)triethoxysilane and stirring at room temperature to obtain a treated titanium dioxide nanowires/carbon nanofiber membrane;
• then transferring the treated titanium dioxide nanowires/carbon nanofiber membrane into DMF containing succinic anhydride, stirring to form a carboxylate-terminated titanium dioxide nanowires/carbon nanofiber membrane;
• (4) using a FeCl3·6H2O solution and a trimesic acid (H3btc) solution as the assembly liquid, the metal organic skeleton is supported on the carboxylate-terminated titanium dioxide nanowires/carbon nanofiber membrane by a layer-by-layer self-assembly method to obtain a titanium dioxide nanowires/metal organic skeleton/carbon nanofiber membrane;
• (5) letting the exhaust gas pass through the titanium dioxide nanowires/metal organic skeleton/carbon nanofiber membrane, and the photocatalytic degradation of the exhaust gas is completed under illumination.