Book excerpt: This book focuses on the nanofiber membrane’s fabrication, characterization, and performance for medical, environment and energy applications. Topics include polymer, inorganic and composite-form nanofiber membrane materials. Top Research teams from varied disciplines and continents outline applied nanofiber membrane fabrication techniques and characterizations. Promising nanofiber membranes for improving and enhancing technologies used in drug delivery, wound healing, tissue engineering, water and wastewater treatment and purification, gas separation and purification, air purification, and fuel cells are discussed along with the likely path forward for commercial usage. Key Features: Shares the most recent discovery solutions from experts all over the globe for the numerous problems in medical, environmental and energy applications. Provides a holistic cycle of nanofiber membrane development which comprehensively discusses the membrane preparation, characterizations, performance and the way forward for a specific process and application. Explains the mechanism of separation and purification. Focuses on the nanofiber membrane’s fabrication, characterizations, and performance in various scenarios and commercial applications.