Oxygen Microbubble Generator Enabled by Tunable Catalytic Microtubes. Issue 14 (6th June 2019)

• Record Type: Journal Article
• Authors: Naeem, Sumayyah; Naeem, Farah; Liu, Jinrun; Quiñones, Vladimir A. Bolaños; Zhang, Jing; He, Le; Huang, Gaoshan; Solovev, Alexander A.; Mei, Yongfeng
• Is Part Of: Chemistry, an Asian journal. Volume 14:Issue 14(2019)
• Page Start: 2431
• Page End: 2434
• Publication Date: 2019-06-06
• Subjects: bubbles -- catalyst -- hydrogen peroxide -- microtubes -- oxygen; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.201900418
• Languages: English
• ISSNs: 1861-4728

Abstract

Abstract: Rolled‐up catalytic Ti/Cr/Pt microtubes, consisting of inorganic nanomembranes integrated on‐chip, are used to generate oxygen microbubbles in solutions of hydrogen peroxide. Oxygen bubble parameters (frequency, radius and volumetric flow rate) are optimized at different concentrations of hydrogen peroxide and common dish soap. Increasing the aspect ratio of the microtube (e.g., tube length/diameter) leads to the formation of smaller bubbles, but at higher frequencies. Longer tubes produce less total oxygen volume in comparison to shorter tubes. We attribute this observation to the specific dynamic behaviours of bubbles in tubes. Abstract : Ready to roll : Rolled‐up catalytic Ti/Cr/Pt microtubes are used to generate oxygen microbubbles using the decomposition of hydrogen peroxide. Microtubes with different lengths in the range of 20–120 μm are tested to optimize parameters, such as oxygen bubble size, bubble frequency, total oxygen volume, and influence of surfactants and concentrations of peroxide fuel. Longer tubes generate bubbles at higher frequencies, but produce less total oxygen gas.