Herein, we synthesized porous Zn_1-xCd_xS nanosheets (PNS)/ZnO nanorod (NR) heterojunction photoanode via self-templated conversion using successively hydrothermal and Cd²⁺ ion exchange methods. Moreover, after conversion of ZnO to inorganic–organic hybrid ZnS-1,6-hexanediamine (HDA)_0.5nanosheets/ZnO NR material, Cd²⁺ ion exchange was conducted. It was confirmed from X-ray photoelectron spectroscopy (XPS) and Transmission electron microscopy (TEM) analyses that the inorganic–organic hybrid ZnS(HDA)_0.5 NS was transformed into Zn_1-xCd_xS PNS/ZnO NR heterojunction photoanode via the replacement of Zn²⁺ by Cd²⁺ ion. Zn_1-xCd_xS PNS/ZnO NR-160C3H heterojunction photoanode synthesized at 160 °C for 3 h showed the highest photocurrent density of 4.10 mA cm⁻² (vs. RHE) under 1.5 G illumination, which was 7.9 times higher than that of bare ZnO NR photoanode. The porous nanostructured morphology and larger surface area of Zn_1-xCd_xS PNS/ZnO NR heterojunction photoanode fabricated by Cd²⁺ ion exchange result in efficient light absorption and effective charge transfer pathway. The photoluminescence (PL) and time-resolved photoluminescence (TRPL) results show the shorter lifetime (37 ns) and reduced recombination in Zn_1-xCd_xS PNS/ZnO NR-160C3H heterojunction photoanode. During PEC analysis, the possible charge transfer mechanism in Zn_1-xCd_xS PNS/ZnO NR heterojunction photoanode was proposed. Surface passivated Zn_1-xCd_xS PNS/ZnO NR-160C3H photoanode shows improved photostability and exhibited 3.8 times higher H₂ evolution (161 μmol) than the Zn_1-xCd_xS PNS/ZnO NR-160C3H (42 μmol) photoelectrode at 0.9 V vs. RHE.

在这里，我们通过连续水热和Cd ²⁺离子交换方法通过自模板转换合成了多孔Zn _1-x Cd _x S纳米片（PNS）/ ZnO纳米棒（NR）异质结光电阳极。此外，在将ZnO转化为无机-有机杂化ZnS-1,6-己二胺（HDA）_0.5纳米片/ ZnO NR材料后，进行了Cd ²⁺离子交换。通过X射线光电子能谱（XPS）和透射电子显微镜（TEM）分析证实，无机-有机杂化ZnS（HDA）_0.5 NS可以通过X-射线转换为Zn _1-x Cd _x S PNS / ZnO NR异质结光阳极。镉替代锌²⁺²⁺离子。Zn _1-x Cd _x S PNS / ZnO NR-160C3H异质结光电阳极在160°C下合成3 h在1.5 G光照下显示最高光电流密度为4.10 mA cm ^-2（相对于RHE），是7.9倍裸露的ZnO NR光电阳极。通过Cd ²⁺离子交换制备的Zn _1-x Cd _x S PNS / ZnO NR异质结光电阳极具有多孔的纳米结构形态和较大的表面积，可实现有效的光吸收和有效的电荷转移途径。Zn _1-x Cd的光致发光（PL）和时间分辨的光致发光（TRPL）结果显示寿命较短（37 ns）且复合减少_x S PNS / ZnO NR-160C3H异质结光电阳极。在PEC分析中，提出了Zn _1-x Cd _x S PNS / ZnO NR异质结光电阳极中可能的电荷转移机理。表面钝化的Zn _1-x Cd _x S PNS / ZnO NR-160C3H光电阳极显示出更高的光稳定性，并且H ₂析出（161μmol）比Zn _1-x Cd _x S PNS / ZnO NR-160C3H（42μmol ）高3.8倍相对于RHE为0.9 V的光电极。