Stereostructure Titanium Dioxide Nanotubes For Hydrogen Production In Photolysis Water

The fast rise of global population leads to the increase of global energy consumption.The consumption of non-renewable resources has been enhanced and it makes great pollution after consumed.Nowadays,renewable resources and environment protecting become the hot topic of society.Hydrogen energy is a kind of renewable and environmental resources.It can be got from water electrolysis or water splitting.Water covers 71% of the area of earth surface and makes it got easily.This paper chooses simple electrochemical anodic oxidation to make a layer of orderly and well distributed Titanium dioxide nanotube arrays thin-film in surface of helical Ti wire.The destination of choosing the chemical dipping method for doping modification of metallic iron is to change the photocatalytic response of Titanium dioxide and strengthen the activity of hydrogen production by photocatalytic pyrolysising of water.Using the characterization methods,such as SEM,EDS and XRD on Titanium dioxide nanotube samples to study the influence of hydrogen production by Titanium dioxide nanotube photocatalytic pyrolysising of water under different conditions: oxidation voltage,Ti wire diameter,water content in electrolyte,oxidation time and different doping concentrations ferric nitrate solution.The results show that the best experiment condition: Ti wire is 0.5mm,electrolyte is quality ratio of ammonium fluoride: ethylene glycol: water = 0.32:111.55:8 mixture,oxidation time is 4-hour,oxidation voltage is 60 V and temperature is 30℃.Before doping modification,under the best experiment condition,the hydrogen production ability of Titanium dioxide nanotube photocatalyst is higher than other experimental conditions.After doping modification,with the increase of ferric nitrate solution concentration(0.02mol/L,0.05mol/L,0.10mol/L and 0.15mol/L),the hydrogen production ability of Titanium dioxide decreases,however,no matter what the concentrations are,the hydrogen production of Titanium dioxide nanotube for doped sample is higher than the pure Titanium dioxide nanotube.Among them,the hydrogen production ability of 0.02mol/L is the highest.Meanwhile,under visible light,the hydrogen production of doped mixture nanotube is higher than un-doped mixture nanotube.It indicates that iron doped samples strengthens the photocatalytic ability.