To efficiently address environmental pollution, we synthesized AC-coupled TiO₂ nano-photo-catalysts and applied it to the degradation of high concentration 2,4-dichlorophenols (2,4-DCP). Herein, we have successfully coupled activated carbon (AC) to TiO₂ by a sol gel method. The as-prepared optimized-amount TO/10AC nano-composites delivered unprecedented photo-catalytic activity as compared to the pristine TO nano-particles and degraded 100% 2,4-DCP in 2 h. According to the fluorescence spectrum, temperature-programed desorption curve, and O₂ electrochemical reduction curve related to the generated OH amounts, it is inferred that the photo-catalytic activity is ascribed to the coupled AC for accepting electrons, promoting O₂ adsorption and promoting reactant adsorption. More importantly, no obvious deactivation was observed even after running at least five cycles; this excellent stability makes them auspicious photo-catalyst for the degradation of high concentration pollutants in practical applications. Besides, the scavenger experiments confirmed that super oxide radicals were the main active species that involve during the photo-catalytic degradation of 2,4-DCP. This work delivers a viable approach to develop the photo-catalysis by coupling a proper amount of AC with the TO for the remediation of high concentration environmental pollutants.

中文翻译：

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多孔活性炭对高浓度 2,4-DCP 降解环境修复 TiO2 光活性的影响

为了有效解决环境污染问题，我们合成了交流耦合的 TiO ₂纳米光催化剂并将其应用于高浓度 2,4-二氯苯酚 (2,4-DCP) 的降解。在此，我们通过溶胶凝胶法成功地将活性炭 (AC) 与 TiO ₂偶联。与原始 TO 纳米颗粒相比，所制备的优化量 TO/10AC 纳米复合材料具有前所未有的光催化活性，并在 2 小时内降解 100% 2,4-DCP。根据荧光光谱、程序升温解吸曲线和与生成的 OH量相关的O ₂电化学还原曲线，推断光催化活性归因于耦合AC接受电子，促进O₂吸附和促进反应物吸附。更重要的是，即使运行至少五个循环后也没有观察到明显的失活；这种优异的稳定性使它们成为在实际应用中降解高浓度污染物的吉祥光催化剂。此外，清除剂实验证实超氧化物自由基是2,4-DCP光催化降解过程中涉及的主要活性物质。这项工作提供了一种可行的方法，通过将适量的 AC 与 TO 偶联来开发光催化，以修复高浓度环境污染物。