Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 275, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2021.119226
Keywords
Photocatalytic water purification; Floating monolithic photocatalyst; BiOBr; rGO; Microcystis aeruginosa inactivation
Categories
Funding
- National Natural Science Foundation of China [52060019, 51668047]
- Key project of Jiangxi Provincial Natural Science Foundation [20202ACBL204015]
- Scientific Startup Foudation for Doctors of Nachang Hangkong University [EA202102181]
- Key International (Regional) Cooperative Research Projects of NSFC [51720105001]
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This study utilized agricultural waste of loofah sponge as catalyst host to support photocatalyst, forming a floating monolithic-like structure for efficient algae wastewater treatment. The designed rGO/BiOBr@LF catalysts showed high photocatalytic activities towards microcystis aeruginosa inactivation and could be easily recycled without significant loss of catalytic activity.
Photocatalysis has long been considered as a promising way for water purification, however the practical application of it has been strictly hindered by the difficulty in photocatalyst recyclability. In this work we report the first use of agricultural waste of loofah sponge as catalyst host to support photocatalyst, forming a floating monolithic-like structure for algae contaminated wastewater treatment. Taking BiOBr as an example, a series of floating monolithic photocatalysts of rGO/BiOBr supporting on loofah sponge (rGO/BiOBr@LF) are fabricated, exhibiting remarkable photocatalytic activities toward microcystis aeruginosa inactivation. Among them, rGO/ BiOBr@LF with rGO loading content of 1.5 wt% (rGO/BiOBr@LF-2) shows the highest photocatalytic algae degradation performance, where more than 90% of microcystis aeruginosa can be removed with the TOC removal of algae reaching 74% within 3 h photocatalysis. Furthermore, the as-prepared rGO/BiOBr@LF-2 could be simply recycled by taking the material out of the solution, while without obvious catalytic activity loss. This work offers a new insight in designing recyclable and floating monolithic photocatalyst for high-efficient practical algae wastewater treatment.
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