Perparation Of Nano-ZnO By Solution Combustion Synthesis And Study Of Photocatalytic Performance

Semiconductor nanomaterials are an important research object in the field of nanotechnology.As a member of semiconductor materials,nano-zinc oxide（ZnO）has attracted much attention due to its own structural characteristics and its excellent photocatalytic performance.In recent years,due to environmental degradation and energy shortages,people’s lives have been seriously jeopardized.As an important semiconductor photocatalyst,zinc oxide has been widely studied in environmental remediation due to its low cost,high stability,non-toxicity and recyclability.In this paper,a mixed solution of zinc nitrate,glucose,and ethanolamine was used as a precursor solution,and nano-ZnO with different sizes and structures was synthesized by solution combustion.On the basis of this method,nano-ZnO particles with hexagonal short rods and hexagonal rods with good dispersibility were obtained by adding potassium chloride.The photocatalytic performance of nano-ZnO with different sizes and morphological structures was studied by degrading antibiotics and compared Nano-ZnO synthesized by hydrothermal method.（1）Using zinc nitrate as the oxidant,ethanolamine as the fuel,and glucose as the carbon source,nano-ZnO powders with different structures such as mesh,flake and layer were obtained by the solution combustion method.The design explores the effects of fuel type,fuel consumption,calcination temperature and other factors on the structure of nano-ZnO.Using a 300W xenon lamp simulating sunlight as a light source,the experiment of photocatalytic degradation of antibiotics was designed,the photocatalytic performance of nano-ZnO prepared under different influencing factors was studied,and it was concluded that the nano-ZnO with a network structure is the best in degrading antibiotics.（2）Using zinc nitrate as a zinc source,cetyltrimethylammonium bromide（CTAB）as a stabilizer,and hexamethylenetetramine（HMT）as an alkali source,nano-ZnO was synthesized by hydrothermal method.The design explored the effects of zinc nitrate concentration,reaction temperature and reaction time on the preparation of highly active nano-ZnO,and explored the best conditions.A 300W xenon lamp simulating sunlight was used as the light source to design the photocatalytic degradation antibiotic experiment.By comparing the photocatalytic performance of the nano-ZnO prepared by the solution combustion method and the hydrothermal method.Conclusion:nano-ZnO prepared by the solution combustion method had better degradation effect.（3）Using the salt-assisted solution combustion method,rod-shaped nano-ZnO was obtained by controlling the molar ratio of Zn²⁺and KCl.Similarly,using a300W xenon lamp as the light source,an aqueous solution for photocatalytic degradation of ciprofloxacin hydrochloride（CIP）was designed.The photocatalytic performance of nano-ZnO synthesized under different molar ratios of Zn²⁺and KCl was studied,and the current molar ratio Zn²⁺:KCl=1:0.5,the synthesized ZnO nanoparticles have excellent catalytic effect,and then the degradation of other antibiotics is used to study their stability.