Based on one-dimensional (1D) H-titanate nanotubes (H-TNTs: TNTs with loosely distributed H⁺ across the interlayers), a novel series of Cd_0.5Zn_0.5S loaded H-TNTs (Cd_0.5Zn_0.5S/TNTs) composites with varied ratios have been achieved by the in-situ growth method. The as-prepared samples were characterized by (high-resolution) transmission electron microscopy (HR/TEM), XRD, FT-IR, XPS, UV–vis diffuse reflectance spectroscopy (UV–vis DRS), fluorescence spectroscopy (FL), photocurrent, electron spin resonance (ESR) spectroscopy, etc. These studies concurrently revealed a successful formation of Cd_0.5Zn_0.5S/TNTs heterojunction, and a homogeneous distribution of Cd_0.5Zn_0.5S nanoparticles over the surface of 1D H-TNTs. The incorporation of the appropriate amount of Cd_0.5Zn_0.5S nanoparticles (10%) significantly improves the efficiency of photogenerated electron-hole pairs separation. The photocatalytic reduction efficiency of the Cd_0.5Zn_0.5S/TNTs for Cr(VI) and degradation efficiency for organic molecules increased initially and then decreased with the amount of loaded Cd_0.5Zn_0.5S nanoparticles. The optimal photocatalytic efficiency was observed at 10 %Cd_0.5Zn_0.5S/TNTs, which were 2.71-fold and 4.8-fold than that of pure H-TNTs for the removal of the Cr(VI) and the degradation of the organic molecules, respectively. The ESR test signified that the holes (h⁺) and superoxide radicals (∙O₂^–) played an essential role in the degradation process of organic molecules. Finally, a reasonable explanation for enhanced photocatalysis performance was proposed.

基于一维 (1D) H-钛酸盐纳米管（H-TNT：H ⁺松散分布在中间层的 TNT），一系列新型 Cd _0.5 Zn _0.5 S 负载 H-TNT（Cd _0.5 Zn _0.5 S/TNT）不同比例的复合材料已通过原位生长方法获得。制备的样品通过（高分辨率）透射电子显微镜（HR/TEM）、XRD、FT-IR、XPS、UV-vis漫反射光谱（UV-vis DRS）、荧光光谱（FL）、光电流、电子自旋共振 (ESR) 光谱等。这些研究同时揭示了 Cd _0.5 Zn _0.5 S/TNTs 异质结的成功形成，以及 Cd的均匀分布1D H-TNT 表面上的_0.5 Zn _0.5 S 纳米颗粒。掺入适量的 Cd _0.5 Zn _0.5 S 纳米粒子 (10%) 显着提高了光生电子-空穴对分离的效率。Cd _0.5 Zn _0.5 S/TNTs对Cr(VI)的光催化还原效率和对有机分子的降解效率随着负载的Cd _0.5 Zn _0.5 S纳米粒子的量的增加先增加然后降低。在 10 % Cd _0.5 Zn _0.5下观察到最佳光催化效率S/TNTs，在去除 Cr(VI) 和降解有机分子方面分别是纯 H-TNTs 的 2.71 倍和 4.8 倍。ESR 测试表明空穴 (h ⁺ ) 和超氧自由基 (∙O ₂ ^– ) 在有机分子的降解过程中发挥了重要作用。最后，提出了增强光催化性能的合理解释。