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Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
Activation of peroxymonosulfate for rhodamine B degradation using bacterial cellulose/bismuth molybdate composite
Yun Tao1, Dingsheng Wu2, Ze Mao3
1School of Textile and Garment, Anhui Polytechnic University, Wuhu, 241000, Anhui, China; Wuhu University, Wuhu, 241008, Anhui, China; Advanced Fiber Materials Engineering Research Center of Anhui Province, Wuhu, 241000, Anhui, China.
Abstract:
This study aims to develop efficient and stable bacterial cellulose/bismuth molybdate (BC/Bi2MoO6) composite fiber membrane photocatalysts for visible light-driven peroxymonosulfate (PMS)-activated degradation of organic pollutant rhodamine B (RhB). Bi2MoO6 nanoparticles were synthesized using the solvothermal method and immobilized ex situ on BC fibers (80-120 nm), forming a uniform 3D network with a specific surface area of 35.2 m2/g. This facilitates RhB adsorption and PMS activation. Consequently, for 25 mg/L RhB (0.3 g/L PMS), the degradation rate reached 88.6 % within 150 min; the degradation rate constant of BC/Bi2MoO6/PMS system was 4.47-fold that of sole PMS and 1.26-fold that of sole BC/Bi2MoO6. Moreover, after 5 cycles, the degradation efficiency remained over 80 %, confirming its good cycling stability. This study clarifies the structure-performance relationship of the composite membrane, providing a technical pathway for developing efficient photocatalysts for organic pollutant degradation.
