 The construction of Z-scheme heterostructures is of great significance for realizing efficient photocatalytic water splitting. Here, the authors report an interfacial chemical bond and internal electric field-modulated Z-scheme SV-ZN in 2S4, most two photocatalyst for efficient hydrogen evolution. This article was authored by Xiu Erhua Wang, Xiong Hu Wang, Jian Feng Huang, and others.