This study presents a synthesis method for nanowire arrayed mesoporous CdS_xSe_1-x compounds with different S/Se molar ratios. Both ternary and binary compound semiconductors are synthesized by hard-templating using SBA-15 as a silica template. The synthesized mesoporous materials have high specific surface areas of approximately 65–100 m² g⁻¹ and remarkable light absorption properties in the UV to visible light region (1.7–2.4 eV), and thus they are appropriate for the photo-conversion of CO₂ into CO and CH₄. The results show that the compositions of CdS_xSe_1-x excellently agree with the compositions of the reactants. Moreover, the band gaps of the mesoporous CdS_xSe_1-x samples could be directly tuned by varying the composition of the reactants. It is concluded that mesoporous CdSe achieves the highest CH₄ yield rate, i.e., 0.382 μmol gcat^–1 h^–1, and CdS_0.5Se_0.5 achieves the highest CO yield rate (among all the samples synthesized), i.e., 5.633 μmol gcat^–1 h^–1. Also, it is found that the CO₂ photoconversion performance on mesoporous II-VI photocatalyst are highly affected by CO₂ adsorption capacities and photo-generated charge separation.

本研究提出了一种具有不同 S/Se 摩尔比的纳米线阵列介孔 CdS _x Se _1-x化合物的合成方法。三元和二元化合物半导体都是使用 SBA-15 作为二氧化硅模板通过硬模板合成的。合成的介孔材料具有约 65-100 m ² g ^{-1 的}高比表面积和显着的紫外至可见光区域（1.7-2.4 eV）的光吸收性能，因此它们适用于 CO 的光转化₂转化为 CO 和 CH ₄。结果表明，CdS _x Se _1-x非常符合反应物的组成。此外，介孔 CdS _x Se _1-x样品的带隙可以通过改变反应物的组成直接调节。得出的结论是，介孔 CdSe 实现了最高的 CH ₄产率，即 0.382 μmol gcat ^–1 h ^–1，CdS _0.5 Se _0.5实现了最高的 CO 产率（在所有合成的样品中），即 5.633 μmol gcat ^{– 1}小时^–1。此外，还发现介孔 II-VI 光催化剂的 CO ₂光转化性能受 CO _{2 的}影响很大 吸附能力和光生电荷分离。