Study On Green Controllable Preparation And Properties Of Heterophase TiO₂ Based On Deep Eutectic Ionic Liquid

Hydrogen production by solar water splitting is one of the most promising methods to solve the problems of environmental pollution and resource shortage,which has drawn wide attention.Due to its unique physical and chemical properties,non-toxic,low cost,good stability,high reactivity,good biocompatibility and other advantages,TiO₂ has become one of the most widely studied and applied photocatalysts.Currently,TiO₂ is mainly used in hydrogen production by hydrolysis,pollutant degradation and CO₂transformation,or other fields.However,there are still many problems with traditional TiO₂ preparation methods,such as complex synthesis steps,high reaction temperature and long reaction time,and the addition of pH regulator,template agent,surfactant and diluent,etc.,seriously affect the industrial application of TiO₂.Therefore,it is necessary to use green solvent to synthesize TiO₂ with different morphology and good performance in a mild,efficient and simple manner.Deep eutectic ionic liquids is a new green solvent with abundant raw materials,simple preparation,low cost,high stability and large scale production.DEILs is generally synthesized by hydrogen bond donor and hydrogen bond acceptor.It is a kind of solvent that can be designed,controlling the morphology and performance of products by changing the type and proportion of donor and acceptor.It is regarded as solvent,template,pH regulator and stabilizer,DEILs is suitable for industrial production.In the first part,the three-component choline chloride/lactic acid/oxalate deep eutectic solvent was prepared and successfully used in the controlled preparation of anatase/rutile heterophase titanium dioxide under mild conditions.The deep eutectic solvent was used as solvent,template agent,inhibitor and crystal control agent.We have tested the hydrophotolytic properties of the synthetic photocatalyst,and finally explored the reasons for the high activity of the catalyst.These findings will provide highly active and heterogeneous catalyst green,moderate and controllable preparation provides a new path,and in the preparation of nanometer materials showed wide application prospect,mainly because of green synthesis process,mild reaction condition,eutectic solvent with low cost,easy to large-scale preparation,green degree is high,and abundant raw materials,etc.In the second part,the three-component betaine/oxalic acid/ethylene glycol deep eutectic solvent was prepared and successfully used in the controlled preparation of anatase/rutile heterophase titanium dioxide under mild conditions.The deep eutectic solvent was used as solvent,template,inhibitor and crystal control agent.We tested the performance of the synthetic photocatalyst for the photodegradation of ofloxacin,an antibiotic.These findings will provide highly active and heterogeneous catalyst green,moderate and controllable preparation provides a new path,and in the preparation of nanometer materials showed wide application prospect,mainly because of green synthesis process,mild reaction condition,eutectic solvent with low cost,easy to large-scale preparation,green degree is high,and abundant raw materials,etc.