Abstract

A ternary synergistic photocatalyst H₃PW₁₂O₄₀/Pt/UiO-66-NH₂ was successfully fabricated for the first time through a simple solvothermal synthetic strategy. We found that the introduced solid acid of H₃PW₁₂O₄₀ could provide bonded H⁺ to improve the oxidation power of Cr(VI), while the introduction of Pt would enhance the charge separation to provide abundant electrons, as a result showing a synergistic effect to facilitate the fast Cr(VI) reduction to Cr(III) under original pH conduction. Benefited from the aforementioned advantages, the as-prepared H₃PW₁₂O₄₀/Pt/UiO-66-NH₂ shows excellent photocatalytic performance toward toxic Cr(VI) reduction, where the Cr(VI) with a concentration of 10 mg L^–1 could be totally reduced into its low toxic state of Cr(III) within one hour of catalytic reaction under neutral pH conditions. The innovative design shown in this work opens a new viewpoint in planning high performance semiconductors for environmental concerned applications.

中文翻译：

---

H3PW12O40 和 Pt 纳米粒子共修饰 UiO-66-NH2 的协同光催化还原原始 pH 条件下的水性 Cr(VI)

摘要

通过简单的溶剂热合成策略，首次成功制备了三元协同光催化剂H ₃ PW ₁₂ O ₄₀ /Pt/UiO-66-NH _{2 。}我们发现引入固体酸H ₃ PW ₁₂ O ₄₀可以提供键合H ⁺以提高Cr(VI)的氧化能力，而引入Pt可以增强电荷分离以提供丰富的电子，结果显示在原始 pH 传导下促进 Cr(VI) 快速还原为 Cr(III) 的协同效应。得益于上述优点，所制备的 H ₃ PW ₁₂ O ₄₀/Pt/UiO-66-NH ₂对有毒的 Cr(VI) 还原具有优异的光催化性能，其中浓度为 10 mg L ^-1的 Cr(VI)可以完全还原为低毒状态的 Cr(III)在中性 pH 条件下催化反应一小时内。这项工作中展示的创新设计为规划用于环境相关应用的高性能半导体开辟了新的视角。