Enhancement of Cr(VI) removal efficiency via adsorption/photocatalysis synergy using electrospun chitosan/g-C 3 N 4 /TiO 2 nanofibers

Chitosan/g-C N /TiO (CS/CNT) nanofibers were fabricated by electrospinning technique for Cr(VI) removal through the adsorption and photocatalytic processes. The effects of crucial factors in the adsorption process including contact time (0-1440 min), pH (1-7), initial concentration of Cr(VI) (20-800...

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Bibliographic Details
Published in:Carbohydrate polymers 2021-02, Vol.253, p.117200
Main Authors: Li, Qing-Hao, Dong, Min, Li, Ru, Cui, Yu-Qian, Xie, Gui-Xu, Wang, Xiao-Xiong, Long, Yun-Ze
Format: Article
Language:English
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Summary:Chitosan/g-C N /TiO (CS/CNT) nanofibers were fabricated by electrospinning technique for Cr(VI) removal through the adsorption and photocatalytic processes. The effects of crucial factors in the adsorption process including contact time (0-1440 min), pH (1-7), initial concentration of Cr(VI) (20-800 mg/L) were investigated. The photocatalytic experiment was executed in a photochemical reactor with an 800 W xenon lamp to simulate visible light. In adsorption process, at pH = 2, the adsorption capacities of chitosan (CS) nanofibers, CS/CNT (CS : g-C N /TiO = 10:1) nanofibers and CS/CNT nanofibers were 20.8, 165.3 and 68.9 mg/g, respectively, suggesting the addition of g-C N /TiO (CNT) could notably enhance the acid resistance of CS and widen its practical application. Under visible-light irradiation, the removal efficiency of Cr(VI) using CS/CNT nanofibers was appreciably improved, which was about 50 % higher than that of pure adsorption, indicating that the CS/CNT nanofibers exhibited the effective synergistic effect of adsorption and photocatalysis.
ISSN:1879-1344