Photocatalytic Activity of Bismuth Tungstate Upgraded by Polyester Fiber
Bismuth tungstate (Bi2WO6) is the most common Aurivillius type oxide and is a hot spot in the field of photocatalysis.
Most of the traditional photocatalytic reactions are carried out in the suspensions of bismuth tungstate catalyst powders. Although they have high photocatalytic activity, bismuth tungstate powders are easy to agglomerate and difficult to separate and recover. In practice, it was recognized that some measures had enabled bismuth tungstate to work, and some scholars had thought of loading bismuth tungstate onto the cloth.
Of course, loading bismuth tungstate on cloth is not a simple mix, and it also requires a series of chemical procedures that combine bismuth tungstate with cloth to function. Acrylic, polyester fiber and so on, have the same effect at last, and their main difference is synthetic method.
Some scholars used polyester as the carrier of bismuth tungstate and prepared them by hydrothermal method, the polyester fabric was treated with acetone and ethanol at 50 °C for 30 min and 80 °C by ultrasonic cleaning. Then soak 40 min in butyl acrylate and dry. Twelve sodium sulfate and Bi2WO6 powder were dissolved in 50 mL deionized water, and then 2 h at room temperature and then removed and dried to obtain the load polyester fabric.
The results show that Bi2WO6 loaded polyester fabric has better UV resistance and water repellency than Bi2WO6 powder alone. The photocatalytic results show that the Bi2WO6 load of polyester fabric on the degradation of methylene blue was significantly higher than that of Bi2WO6 powder, the degradation efficiency of methylene blue reached 92%, this is because the load after Bi2WO6 got a stable platform, can play a balanced effect.
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