Freestanding hematite nanofiber membrane for visible-light-responsive photocatalyst

详细信息    查看全文

• 作者：Ing-orn Sittirugp>ap> ; Bussarin Ksapabutrp>ap>p> ; p>p>bp>p> ; p>p>kbussarin@gmail.com" class="auth_mail" title="E-mail the corresponding authorp> ; Manop Panapoyp>ap>p> ; p>p>bp>p> ; p>p>mpanapoy@hotmail.com" class="auth_mail" title="E-mail the corresponding authorp>
• 关键词：α-Fe2O3 ; Electrospinning ; Sol&ndash ; gel process ; Nanofiber membrane ; Photocatalysis
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：15 February 2016
• 年：2016
• 卷：42
• 期：3
• 页码：3864-3875
• 全文大小：5329 K

文摘

Freestanding mesoporous hematite (α-Fe₂O₃) nanofiber membranes were successfully fabricated by sol–gel electrospinning process using ferratrane precursor for use as a high-performance material for visible-light-responsive photocatalyst. Non-porous nanofiber membranes spun on the heated collector at 300 °C were crystalline α-Fe₂O₃ phase. Upon calcination, pure mesoporous nanofiber membranes were obtained even at a low temperature of 400 °C. The photocatalytic membrane calcined at 400 °C showed the highest efficiency for methylene blue (MB) degradation under visible-light irradiation. The synergetic effects of higher surface area, pore volume and pore diameter promoted the photocatalytic efficiency for MB degradation under visible light. The utilization of photocatalyst in the form of membrane could not only solve the problems of catalyst separation and recovery, but also produce high photodegradation efficiency for both systems without and with hydrogen peroxide even at a catalyst loading as low as 0.04 g/L. No appreciable loss in photocatalytic activity was observed and structural integrity was retained, even after five cycles of photodegradation, which predicted the stability and reusability of these nanofiber membranes for practical use in environmental applications.