A study on tio2 surface texturing effect for the enhancement of photocatalytic reaction in a total phosphorous concentration measurement system

Jae Keon Kim, Seung Deok Kim, Jae Yong Lee, Chang Hee Kim, Hyeon Su Lee, Seong Mo Koo, Youngjin Lee, Jong Hoo Paik, Da Ye Kim, Seong Ho Kong

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Powerful sunlight, a high water temperature, and stagnation in the water flow induce eutrophication in rivers and lakes, which destroys the aquatic ecosystem and threatens the down-stream water supply systems. Accordingly, it is very important to perform real-time measurements of nutrients that induce algal growth, especially total phosphorus, to preserve and manage the aquatic ecosystem. To conduct quantitative analysis of the total phosphorus in the aquatic ecosystem, it is essential to perform a pretreatment process and quickly separate the phosphorus, combined with organic and inorganic materials, into a phosphate. In this study, the sandblasting process was used for the physical etching of the wafer, and photocatalytic materials were deposited on the surface with various roughness in order to improve the photocatalytic reaction surface and efficiency. The photocatalytic reaction was applied to combine the pretreated sample with the coloring agent for color development, and the absorbance of the colored sample was analyzed quantitatively to compare and evaluate the characteristics, followed by the surface increase in the photocatalytic materials. In addition, the pretreatment and measurement parts were materialized in a single chip to produce a small and light total phosphorus analysis sensor.

Original languageEnglish
Article number1163
JournalMicromachines
Volume12
Issue number10
DOIs
StatePublished - Oct 2021

Keywords

  • Photocatalysis
  • Sandblast
  • Surface texturing
  • Total phosphorus

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