Coaxial Electrospinning Method for the Preparation of TiO2@CdS/PVA Composite Nanofiber Mat and Investigation on its Photodegradation Catalysis. (18th May 2016)

• Record Type: Journal Article
• Authors: Luo, Yanmei; Jia, Yiru; Zhang, Dexian; Cheng, Xinjian
• Is Part Of: Photochemistry and photobiology. Volume 92:Number 4(2016)
• Page Start: 515
• Page End: 522
• Publication Date: 2016-05-18
• Subjects: Photochemistry -- Periodicals; Light -- Physiological effect -- Periodicals; 541.35
• DOI: 10.1111/php.12591
• Languages: English
• ISSNs: 0031-8655

Abstract

Abstract: TiO2 /PVA composite nanofiber mat was prepared via an electrospinning technology. SH‐TiO2 ‐SiO2 hybrid particles and PVA solution were injected through a coaxial syringe, yielding a composite nanofiber mat. The as‐prepared SH‐TiO2 ‐SiO2 /PVA composite nanofiber mat was immersed in Cd 2+ cation solution and S 2− anion solution in turn. Thus, yellow TiO2 @CdS/PVA composite nanofiber mats were prepared. By adjusting the number of times a mat was immersed in the Cd 2+ and S 2− solutions, different amounts of CdS particles attaching to the mats were obtained. Both SH‐TiO2 ‐SiO2 /PVA and TiO2 @CdS/PVA composite nanofiber mats were employed to catalyze the photodegradation of a model dye, methylene blue. The photodegradation performance could be greatly enhanced by the introduction of CdS particles anchoring onto TiO2 particles. The photodegradation efficiency reached 99.2% within 180 min. Also, the nanofiber mat could be recycled and reused at least 10 times. The photodegradation efficiency of TiO2 @CdS/PVA composite nanofiber mats remained 68.8% for 10 cycles. Abstract : A TiO2 /PVA composite nanofiber mat was prepared first, and then the mat was immersed in Cd 2+ and S 2− solutions to obtain a TiO2 @CdS/PVA composite nanofiber mat. The as‐prepared mat exhibited excellent photodegradation ability for a model dye, methylene blue.