Hydrothermal Synthesis And Catalysis Of Manganese And Titanium Oxides

In the 21 st century,environmental governance and energy shortages have gradually become the two major problems facing the common humanity.The combustion and industrial emissions of coal,oil and other fossil fuel emissions,not only causes carbon monoxide pollution due to incomplete combustion,but also can easily lead to the depletion of energy as fossil fuels are non renewable resources.Therefore,the control of carbon monoxide pollution and the development of renewable solar energy resources has become an important direction for the development of environmentalfriendly science.The development of efficient carbon monoxide catalysts and photocatalysts is the two hot spot of scientific research recently.In this paper,manganese oxide and titanium dioxide were synthesized by hydrothermal method,and modified them to enhance the catalytic effect.?1?In this paper,we synthesized perovskite oxide La_0.5Sr_0.5MnO₃.Selective dissolution is a common process using diluted HNO₃ to remove La³⁺ and Sr²⁺ cations,acquiring a novel MnO₂ like material?MO?.XRD,XPS,SEM,EDS,BET,H2-TPR and other methods were used to characterize the crystal structure,morphology and composition of the composites.The surface area increased significantly and got excellent low-temperature reducibility.The catalytic oxidation activity of MO can be determined by the catalytic performances of the oxidation of CO and activation energy calculation.All of these provided the prerequisite for the excellent performance of the catalyst activity on CO oxidation.?2?TiO₂ has unique advantage in the field of photocatalytic due to its excellent optical properties,anti-light corrosion,low cost and stable performance.In this paper,TiO₂ nanowire arrays were synthesized on FTO conductive glass by hydrothermal method and were modified with Pd nanoparticles by the technique of Electrospray Ionization,obtained the composite material Pd/TiO₂ nanowire arrays.XPS analysis was conducted to confirm metallic Pd?0?is the only palladium phase present.SEM image of Pd/TiO₂ were used to show that Pd nanoparticles were dispersed uniformly on TiO₂ NWs with an average size of 8 nm.It was proved that Pd-nanoparticledecorated can significantly promoted photocurrent response by photocurrent density Measure.