Abstract

In this work, the Cd_{1 – x}Zn_xS/TiO₂ photocatalysts were synthesized and characterized by X-ray diffraction (XRD) analysis and diffusion reflectance spectroscopy (DRS). The catalytic properties of the obtained samples were investigated in the photocatalytic reduction of carbon dioxide with water vapor under visible light (400–510 nm; a maximum radiation intensity was at a wavelength of 450 nm). The highest catalytic activities were demonstrated by 20% Cd_0.7Zn_0.3S/TiO₂ and 50% Cd_0.7Zn_0.3S/TiO₂. The effect of the deposition order of the Pt, Cd_0.7Zn_0.3S, and TiO₂ components on the efficiency of photocatalytic processes was studied. The highest reaction rates of 4.2 μmol h^–1 g^–1 CO and 0.6 μmol h^–1 g^–1 CH₄ were obtained over 50%Cd_0.7Zn_0.3S/1% Pt/TiO₂.

中文翻译：

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基于硫化镉、硫化锌、二氧化钛和铂的固溶体的新型复合光催化剂，用于可见光下水蒸气光催化还原二氧化碳

摘要

在这项工作中，合成了 Cd _{1 – x} Zn _x S/TiO ₂光催化剂，并通过 X 射线衍射 (XRD) 分析和扩散反射光谱 (DRS) 对其进行了表征。在可见光（400-510 nm；最大辐射强度为450 nm波长）下用水蒸气光催化还原二氧化碳中研究了所得样品的催化性能。20% Cd _0.7 Zn _0.3 S/TiO ₂和50% Cd _0.7 Zn _0.3 S/TiO ₂表现出最高的催化活性。Pt、Cd _0.7 Zn _0.3沉积顺序的影响研究了 S 和 TiO ₂组分对光催化过程效率的影响。在 50% Cd _0.7 Zn _0.3 S/1% Pt/TiO _{2 上}获得最高反应速率 4.2 μmol h ^–1 g ^–1 CO 和 0.6 μmol h ^–1 g ^–1 CH ₄。