[Accepted] Jinwook Lee, Geun Park, Jung-Hoon Yun, Gyeong Chan Kim, Dennis T. Lee, Sangchul Roh, Jooyoun Kim,* Self-Sacrificial Growth of Heterojunction Photocatalytic Fibers as a Humidity-Adaptive Platform for Sustainable VOC Purification, Advanced Fiber Materials, xx(xx):xx. [Funded by 한국연구재단/과학기술정보통신부 RS-2024-00405333; RS-2025-00523094]