Polyoxometalates-doped Bi2O3–/Bi photocatalyst for highly efficient visible-light photodegradation of tetrabromobisphenol A and removal of NO

Bismuth-based photocatalysts are a class of excellent visible-light photocatalysts; however, their redox activity is relatively poor and the efficiency photogenerated carrier separation low, limiting development application in field photocatalysis. To address these issues, series polyoxometalate PW12O403–-doped Bi2O3–x/Bi Schottky PW12@Bi2O3–x/Bi-n (PBOB-n, where n amount NaBH4, i.e., 6, 12, 18, 24, 48 mg) were prepared by simple electrospinning/calcination/in-situ NaBH4 reduction method. In this composite photocatalyst, doping PW12 could effectively adjust electronic structure Bi2O3–x improve its properties. As shallow electron trap, promoted carriers. Furthermore, desirable junction between metal Bi nanoparticles PW12@Bi2O3–x further accelerated The synergistic effect aforementioned factors endowed PBOB-n with photocatalytic activity. Among samples, PBOB-18 exhibited superior Under irradiation, 93.7% (20 mg catalyst) 20 ppm tetrabromobisphenol A (TBBPA, mL) was degraded 60 min. Its 4.4 times higher than that Bi2O3. also an ultrahigh performance for removal NO. rate (600 ppb) reached 83.3% 30 min, making it one most active Bi-based photocatalysts. mechanisms TBBPA NO have been proposed. This work provides new direction reference design low-cost, efficient, stable, versatile