Sparked by the growing environmental crises, photocatalytic degradation of chlorophenols with inexhaustible solar energy is expected to be converted into actual applications. Here, we report the preparation of the nanocomposite of Cu₂(OH)PO₄ and reduced graphene oxide (Cu₂(OH)PO₄/rGO) through a one-step hydrothermal method and examined its infrared-light photocatalytic activity in the degradation of 2,4-dichlorophenol (2,4-DCP). As evidenced by the absorption spectra and the degradation of 2,4-DCP, Cu₂(OH)PO₄/rGO exhibited enhanced infrared light-driven photocatalytic activity compared to pure Cu₂(OH)PO₄ and was very stable even after repeated cycling. More importantly, the introduction of hydrogen peroxide (H₂O₂) could combine the photocatalytic and photo-Fenton effects into one reaction system and maximize the infrared light photocatalytic efficiency. Typically, the rate constant of Cu₂(OH)PO₄/rGO and H₂O₂ was more than 6.25 times higher than that of only Cu₂(OH)PO₄/rGO, and almost 10 times greater than the value for pure Cu₂(OH)PO₄. Further, a plausible mechanism for the enhanced photocatalytic properties of Cu₂(OH)PO₄/rGO has been discussed. These findings may help the development of novel hybrid photocatalysts with enhanced infrared light photocatalytic activity for applications in the treatment of chlorophenol-contaminated wastewater.

中文翻译：

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Cu2(OH)PO4/还原氧化石墨烯纳米复合材料用于增强红外光照射下 2,4-二氯苯酚的光催化降解†

在日益严重的环境危机的推动下，用取之不尽的太阳能光催化降解氯酚有望转化为实际应用。在这里，我们报道了通过一步水热法制备了 Cu ₂ (OH)PO ₄和还原氧化石墨烯 (Cu ₂ (OH)PO ₄ /rGO) 的纳米复合材料，并检测了其在降解过程中的红外光催化活性。 2,4-二氯苯酚 (2,4-DCP)。正如吸收光谱和 2,4-DCP 的降解所证明的那样，与纯 Cu ₂ (OH)PO _{4相比，Cu 2} (OH)PO ₄ /rGO 表现出增强的红外光驱动光催化活性并且即使在反复循环之后也非常稳定。更重要的是，过氧化氢（H ₂ O ₂）的引入可以将光催化和光芬顿效应结合到一个反应体系中，最大限度地提高红外光的光催化效率。通常，Cu ₂ (OH)PO ₄ /rGO 和 H ₂ O _{2的速率常数比仅 Cu 2} (OH)PO ₄ /rGO 的速率常数高 6.25 倍以上，几乎是纯的值的 10 倍。 Cu ₂ (OH)PO ₄。_{此外，Cu 2} (OH)PO ₄增强光催化性能的合理机制/rGO 已经讨论过了。这些发现可能有助于开发具有增强红外光催化活性的新型混合光催化剂，用于处理受氯酚污染的废水。