Abstract
Development of immobilized composite photocatalysts for efficient inactivation of algal cells is important because of the features of easy recycling and high stability. Herein, ultrathin g-C3N4 (SCN) are embedded into cellulose acetate (CA) matrix to form CA/SCN composite membranes. The obtained photocatalytic membranes exhibit the properties of thickness uniformity, flexible and higher light absorption compared to the bulk one. Under visible light, 92% of algal can be removed by the optimal CA/SCN photocatalytic membrane (CA/SCN-200). During photocatalytic algal inactivation, algal cells occur photosynthetic activity decrease, antioxidant system collapse and membrane damage. In addition, algal organic matters and MC-LR can also be removed during the photocatalytic process. More importantly, large area membrane which also exhibits high algal removal performance can be prepared easily. This work provides a new way to develop high performance photocatalytic membranes for algal removal.
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