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Communication

Paper-based Photocatalysts Immobilization without Coffee Ring Effect for Photocatalytic Water Purification

Department of Bioengineering, State Key Laboratory of Biobased Material and Green Papermaking, Advanced Research Institute for Multidisciplinary Science, School of Food Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
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Micromachines 2020, 11(3), 244; https://doi.org/10.3390/mi11030244
Received: 4 January 2020 / Revised: 19 February 2020 / Accepted: 23 February 2020 / Published: 26 February 2020
(This article belongs to the Special Issue Optofluidic Devices and Applications)
Photocatalytic water purification is important for the degradation of organic pollutants, attracting intensive interests. Photocatalysts are preferred to be immobilized on a substrate in order to reduce the laborious separation and recycling steps. To get uniform irradiation, the photocatalysts are preferred to be even/uniform on the substrate without aggregation. Generally, the “coffee ring effect” occurs on the substrate during solvent evaporation, unfortunately resulting in the aggregation of the photocatalysts. This aggregation inevitably blocks the exposure of active sites, reactant exchange, and light absorption. Here, we reported a paper-based photocatalyst immobilization method to solve the “coffee ring” problem. We also used a “drop reactor” to achieve good photocatalytic efficiency with the advantages of large surface area, short diffusion lengths, simple operation, and uniform light absorption. Compared with the coffee ring type, the paper-based method showed higher water purification efficiency, indicating its potential application value in the future. View Full-Text
Keywords: photocatalysis; microreactor; optofluidics; photocatalytic water purification; paper photocatalysis; microreactor; optofluidics; photocatalytic water purification; paper
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MDPI and ACS Style

Li, Q.; Lin, H.; Huang, X.; Lyu, M.; Zhang, H.; Zhang, X.; Wang, R. Paper-based Photocatalysts Immobilization without Coffee Ring Effect for Photocatalytic Water Purification. Micromachines 2020, 11, 244. https://doi.org/10.3390/mi11030244

AMA Style

Li Q, Lin H, Huang X, Lyu M, Zhang H, Zhang X, Wang R. Paper-based Photocatalysts Immobilization without Coffee Ring Effect for Photocatalytic Water Purification. Micromachines. 2020; 11(3):244. https://doi.org/10.3390/mi11030244

Chicago/Turabian Style

Li, Qingwei, Huichao Lin, Xiaowen Huang, Maocui Lyu, Hongxia Zhang, Xiaoning Zhang, and Ruiming Wang. 2020. "Paper-based Photocatalysts Immobilization without Coffee Ring Effect for Photocatalytic Water Purification" Micromachines 11, no. 3: 244. https://doi.org/10.3390/mi11030244

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