SnS₂ was hybridized with BaTiO₃ to form an efficient and cheap Z-scheme heterojuncted SnS₂/BaTiO₃ photocatalyst by depositing nanosized SnS₂ on the surface of commercial micro-sized BaTiO₃. Multiple characterization techniques have been employed to study the as-prepared samples. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) results reveal that SnS₂ partly covers BaTiO₃. The photoluminescence (PL) spectra and the electrochemical impedance spectroscopy (EIS) investigation exhibit that the heterojunction SnS₂/BaTiO₃ has improved the separation and transfer of the photogenerated electron-hole pairs. UV–Vis-DRS and Mott-Schottky measurement give the estimated E_g, E_CB, and corresponding calculated E_VB, which meet the requirements of Z-scheme. The photocatalytic efficiency (degradation is 98% within 20 min) has been greatly enhanced much higher than pure SnS₂. Free radical trapping experiments indicates that superoxide (•O₂⁻) is the dominant active species of the reaction system. The improved photocatalytic performance, as well as the free radical trapping experiments support the Z-scheme mechanism for composite photocatalyst SnS₂/BaTiO₃. This work reveals that Z-scheme composite SnS₂/BaTiO₃ has prospect in treating organic pollution in waste water.

SnS ₂与BaTiO ₃杂交，通过在商用微米级BaTiO ₃的表面上沉积纳米级SnS ₂，形成高效廉价的Z型异质结SnS ₂ / BaTiO ₃光催化剂。已采用多种表征技术来研究制备的样品。扫描电子显微镜（SEM），透射电子显微镜（TEM）和高分辨率透射电子显微镜（HRTEM）的结果表明，SnS ₂部分覆盖了BaTiO ₃。光致发光（PL）光谱和电化学阻抗谱（EIS）研究表明，异质结SnS ₂ / BaTiO_图3改善了光生电子-空穴对的分离和转移。UV-Vis-DRS和Mott-Schottky测量得出满足Z方案要求的估计E _g，E _CB以及相应的计算E _VB。与纯SnS ₂相比，光催化效率（在20分钟内降解98％）大大提高。自由基捕获实验表明，过氧化物（•Ø ₂ ^- ）是在反应体系的主要活性物质。改进的光催化性能以及自由基捕获实验支持复合光催化剂SnS ₂的Z方案机理/ BaTiO ₃。这项工作表明Z方案复合SnS ₂ / BaTiO ₃具有处理废水中有机污染的前景。