1095-71036872025JunJ Colloid Interface SciEngineering bidirectional charge transport channels boosts solar driven sulfion oxidation upgrading coupled with hydrogen production.413422413-42210.1016/j.jcis.2025.02.079S0021-9797(25)00433-3The inefficient charge separation and transport remains a bottleneck in photocatalysis. While various strategies have been explored to improve this process, most focus on single-sided modulation either the conduction-band electrons or valence-band holes, limiting overall improvement. Herein, an innovative coupling modification approach is adopted where Ru and α-Fe₂O₃ (FO) nanoparticles are integrated onto ZnIn₂S₄ (ZIS) to prepare Ru/ZnIn₂S₄/α-Fe₂O₃, and constructs dual charge transfer pathways for electrons and holes. This bidirectional channel configuration significantly enhances carrier separation and accumulation, enabling Ru as an electron (e^-) mediator and FO as a hole (h⁺) extraction facilitator, driving simultaneous redox reactions, and enabling substantial improvement in the photocatalytic sulfur oxidation process coupled with hydrogen generation. This approach enhances interface charge separation/spatial accumulation and provides valuable guidance for designing and developing advanced high-efficiency photocatalytic systems.Copyright © 2025 Elsevier Inc. All rights reserved.GuoHaoqiHShaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, China.FuMengxiMShaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, China.DuRuiRShaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, China.SoomroRazium AliRAShaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, China.GuoLiLShaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, China. Electronic address: guoli20052017@163.com.HuangXinXShaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, China.WangMimiMShaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, China.YangChunmingCShaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, China; Hubei Three Gorges Laboratory, Yichang 443007, Hubei, China. Electronic address: chunmingyang@yau.edu.cn.WangDanjunDShaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, China. Electronic address: wangdj761118@yau.edu.cn.engJournal Article20250215