In this study, the relationship of polymerization and photocatalytic performance was systematically studied by investigating a series of Ag₂O·x(MoO₃) (x = 1, 2, 3, 4) samples. Characterization results indicated that two decisive factors of photocatalytic performance, light harvesting and the separation of charge carriers, were significantly influenced by polymerization. UV-vis diffuse reflectance spectra (DRS) illustrated that the visible light absorption range was significantly increased with the increase of polymerization degree. Photocurrent measurement showed that the separation of charge carriers increased until the polymerization degree increased to three, and further increase of polymerization degree restrained the separation of charge carriers because of the narrow band gap. The degradation experiment showed that the photocatalytic performance was significantly enhanced by polymerization, and the degradation rates of Ag₂Mo₃O₁₀ and Ag₂Mo₄O₁₃ reached a maximum and were nearly the same. Density functional theory (DFT) calculation was applied to explain the enhancement mechanism of light harvesting and photocurrent properties. This study strongly suggests that polymerization must be taken into account for design and exploitation of efficient photocatalysts.

中文翻译：

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通过研究Ag ₂ O· x（MoO ₃）（x = 1，2，3，4）光催化剂 对聚合和光催化性能的系统研究

本研究通过研究一系列的Ag ₂ O· x（MoO ₃）（x= 1，2，3，4）个样本。表征结果表明，聚合反应显着影响光催化性能的两个决定性因素，即光收集和电荷载流子的分离。紫外可见漫反射光谱（DRS）表明，可见光的吸收范围随聚合度的增加而显着增加。光电流测量表明，直到聚合度增加到3为止，电荷载流子的分离一直增加，并且聚合度的进一步提高由于带隙较窄而限制了电荷载流子的分离。降解实验表明，聚合反应显着提高了光催化性能，Ag ₂ Mo ₃ O的降解速率₁₀和Ag ₂ Mo ₄ O ₁₃达到最大值，并且几乎相同。应用密度泛函理论（DFT）计算来解释光收集和光电流特性的增强机理。这项研究强烈表明，在设计和开发有效的光催化剂时必须考虑聚合反应。