Soft High-Loading TiO 2 Composite Biomaterial Film as an Efficient and Recyclable Catalyst for Removing Methylene Blue
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ISSN 1229-9197 (print version) ISSN 1875-0052 (electronic version)
Soft High-Loading TiO2 Composite Biomaterial Film as an Efficient and Recyclable Catalyst for Removing Methylene Blue Jinyan Hu, Dingsheng Wu, Quan Feng*, Anfang Wei, and Beibei Song Key Laboratory of Textile Fabrics, College of Textiles and Clothing, Anhui Polytechnic University, Wuhu, Anhui 241000, China (Received June 5, 2019; Revised September 8, 2019; Accepted December 8, 2019) Abstract: Currently, the preparation of novel efficient and recyclable photocatalysts for pollutant degradation in water has become a research hotpot. In this study, a TiO -loaded non-woven polypropylene/bacterial cellulose (TiO -loaded NPBC) composite film was prepared by a biological culturing method. The TiO nanoparticles were spontaneously embedded into the prepared composite film. Then, the composite film was used to degrade methylene blue (MB) and its degradation effects were explored. The morphology of the composite film was investigated. It was clear that a large amount of TiO nanoparticles were embedded into the composite membrane during the biological culturing method. The experimental results confirmed that the TiO -loaded NPBC composite film had good degradation performance and reusability. When the reaction time was 120 min, the removal rate of MB by the film was 92.8 %. The removal rate remained above 85 % after 5 degradation cycles. 2
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Keywords: TiO , Eco-friendly, Bacterial cellulose, Methylene blue degradation, In situ growth 2
(MG) and acid red 27 (AR 27) to harmless products [7]. Due to its high activity, non-toxicity, low cost, and good chemical properties, titanium dioxide (TiO2) has been widely used in antibacterial, photocatalytic, and self-cleaning applications [8]. Several studies have reported that TiO2 can degrade pollutants, typically in the form of colloidal solutions and particle suspension systems; however, the recycling process is very complicated and can easily cause secondary pollution [9,10]. Hence, there is an urgent need for selecting carriers, such us glass, silica gel, stainless steel, or activated carbon, that can support TiO2 nanoparticles. However, due to their respective low surface areas, the TiO2 cannot be fully immobilized. Furthermore, the development of TiO2-loading technology plays an important role in expanding the use of photocatalytic technology [11,12]. In our previous study, TiO2/organic (PLA, PMMA, PVA, etc.) composite nanofibers were prepared by electrospinning. However, due to technical limitations, the content of TiO2 in the prepared composite nanofibers was low [13]. Bacterial cellulose (BC), a biopolymer material produced by the fermentation of Komagataeibacter xylinus, is widely used in variety of fields due to its high water holding capacity, 3D flexible structure, good biocompatibility, and biodegradability [14,15]. It has been used in inorganic and organic hybrid nanocomposites as an ideal template, such as Ag/bacterial cellulose composites [16], laccase-immobilized bacterial cellulose material
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