Effect of pH on Synthesis of Zinc Oxide by Sol-Gel Method for Methylene blue dye Degradation Photocatalytic Activity

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จินดาพร สืบขำเพชร
Ukrit Najampa
ธีระวิทย์ พลโคกก่อง
วรุตม์ คุณสุทธิ์

Abstract

This research was investigated the preparation of zinc oxide by the sol-gel process and the base value at pH 8 – 13 affecting morphology and methylene blue degradation efficiency. ZnO samples were analyzed crystalline structure  with the X-Ray Diffractometer. It was found that only the zinc oxide phase was formed with pH 8 having the highest light intensity. Phonological characteristics and particle size were analyzed using Field Emission Scanning Electron Microscopy. It was found that pH 8, 9, 10, 11, 12 and 13 had nano-particle characteristics and the average particle size was 213.7, 164.5, 248.9, 261.6, 200.3 and 208.7 nm, respectively. The elements were analyzed by Energy Dispersive X-Ray Spectroscopy. The elements found were carbon (C), oxygen (O) and zinc (Zn). The degradation of methylene blue was measured by UV-Vis spectrophotometer, and it was found that within 100 minutes, zinc oxide at pH 13 was the best decomposition of methylene blue solution with a degradation efficiency of 94.41%.


 

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สืบขำเพชร จ., Najampa, U., พลโคกก่อง ธ. . ., & คุณสุทธิ์ ว. . (2024). Effect of pH on Synthesis of Zinc Oxide by Sol-Gel Method for Methylene blue dye Degradation Photocatalytic Activity. Journal of Science and Technology Buriram Rajabhat University (Online), 6(2), 99–111. retrieved from https://ph02.tci-thaijo.org/index.php/scibru/article/view/247197 (Original work published December 27, 2022)
Section
Research Articles

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