Photoactive and non-hazardous kaolin/ZnO composites prepared by calcination of sodium zinc carbonate
Source abstract
Abstract
Abstract The photocatalytic activity of kaolin/ZnO composites prepared by calcination was investigated. The proposed synthesis procedure comprises the reaction of ZnCl 2 with Na 2 CO 3 in water dispersion of kaolin KKAF. Precursor sodium zinc carbonate Na 2 Zn 3 (CO 3 ) 4 ·3H 2 O is formed and after its thermal decomposition the nanostructured ZnO is formed. Using this procedure the kaolin/ZnO composites containing ~ 6 and ~ 39 mass% of ZnO were prepared. X-ray fluorescence was used for determination of the ZnO yield. Phase composition of composites thermally treated at 100–600 °C was studied using X-ray diffraction method. UV-VIS diffuse reflectance spectroscopy was used to determine the band gap energy of prepared composites and their photocatalytic activity was tested by discoloration of Acid Orange 7 in aqueous solution. Composite containing ~ 39 mass% of ZnO and calcined at 600 °C exhibits the highest photocatalytic activity. Leaching tests proved that the composites can be considered non-hazardous.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Pigment Synthesis and Properties · TiO2 Photocatalysis and Solar Cells
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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