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PROCESS FOR MANUFACTURING A PHOTOCATALYST UNIFORM FILM AS NANOTHREAD ARRAY BASED ON ZINC OXIDE HYBRIDIZED WITH GRAPHENE OXIDE BY DOUBLE-PULSE ELECTRODEPOSITION
PROCESS FOR MANUFACTURING A PHOTOCATALYST UNIFORM FILM AS NANOTHREAD ARRAY BASED ON ZINC OXIDE HYBRIDIZED WITH GRAPHENE OXIDE BY DOUBLE-PULSE ELECTRODEPOSITION
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机译：基于双脉冲电沉积法制备基于氧化锌与氧化石墨烯氢化的纳米级阵列的光催化剂均匀膜的方法
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摘要
The invention relates to a process for manufacturing photocatalysts as nanostructured films of zinc oxide hybridized with graphene oxide, to be used in photocatalytic degradation of various organic pollutants existing in waste waters from textile industry. According to the invention, the process has the following stages: a. depositing a graphene oxide film, at a C/O atomic ratio = 0.7, on a sublayer coated with indium and tin oxide ITO by drop-casting of 40...200 μL of aqueous suspension of graphene oxide 0.1 mg/mL, b. using the support with indium and tin oxide ITO modified with graphene oxide as a work electrode, in a system of three electrodes which also comprises Pt as counter-electrode and Ag/AgCl as reference electrode, for potentiostatic deposition of ZnO as nanothreads by applying a nucleation pulse of -1.3 V for 50...100 s and a growing pulse of -0.95...-1.05 V for 10...20 min, from an aqueous solution of Zn(NO), at a temperature ranging between 70...80°C, the modulation of the properties of ZnO and, implicitly, the functionality of the films of ZnO hybridized with graphene oxide for photocatalytic degradation of the organic pollutants being performed by adjusting the C/O atomic ratio of the graphene oxide and the electrodeposition conditions, such as the value and the duration of the pulse potentials for the nucleation and growth stages.
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