Photothermally boosted Fenton-like activity of copper sulfide toward the catalytic degradation of 4-chlorophenol
Photothermally boosted Fenton-like activity of copper sulfide toward the catalytic degradation of 4-chlorophenol
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DOI：
10.1016/j.jallcom.2023.169337
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发表时间：
2023-02
影响因子：
6.2
通讯作者：
Mengxin Wang;Donglin Liu;Zhenmin Xu;Qiwei Tian;Wei‐Mei Chai;Lu An
中科院分区：
文献类型：
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作者：
Mengxin Wang;Donglin Liu;Zhenmin Xu;Qiwei Tian;Wei‐Mei Chai;Lu An
Fenton/Fenton样反应在生物医学和环境修复中具有广阔的应用前景。但由于光能利用不完全、能量转换效率低、h2o2利用率低等原因，其应用仍受到限制。本文利用近红外（NIR）光吸收和光热转换，利用水热法制备了一种典型的掺杂硫化铜（Cu2−xS）半导体，实现了对水中4-氯苯酚（4-CP）的去除。得到的cu不仅是一种有吸引力的类fenton剂，而且在近红外光谱范围内表现出高效的光热转换性能，拓宽了太阳光谱的使用范围，有利于光热增强的类fenton降解过程。在1064 nm的近红外激光照射下，cu表现出优异的近红外吸收能力，并在50℃以上产生高热。重要的是，cu纳米片的光热效应通过加速自由基（h+、•O2-、1O2，尤其是•OH）的生成和扩散，显著提高了类芬顿反应的产率，从而实现了污染物降解的关键机制。此外，cu纳米片在4-CP降解过程中表现出良好的稳定性，金属离子泄漏量小，适用pH范围广，降解速率几乎不受激光功率、催化剂浓度和金属离子存在的影响。这些结果证明了光热增强的芬顿效应在污染物降解中的强大潜力，并为有效利用太阳能进行环境修复提供了一种有希望的策略。
Fenton/Fenton-like reactions have promising implications in biomedicine and environment-related remediation. However, their applications are still limited because of incomplete light utilization, low energy-conversion efficiency, and inefficient H2O2utilization. Herein, near infrared (NIR) light absorbance and photothermal conversion were utilized for H2O2activation to achieve 4-chlorophenol (4-CP) elimination from water by using a typical doped copper sulfide (Cu2−xS) semiconductor developed via a hydrothermal method. The obtained CuS is not only an attractive Fenton-like agent but also exhibits efficient photothermal conversion performance in the NIR spectral range, which broadens the use of the solar spectrum and is beneficial to the photothermal-enhanced Fenton-like degradation process. As expected, by irradiating with an NIR laser (1064 nm), the CuS exhibits excellent NIR absorption capacity and produces hyperpyrexia above 50 ℃. Importantly, the photothermal effects of the CuS nanosheets significantly enhanced the yield of the Fenton-like reaction by accelerating the generation and diffusion of free radicals (h+, •O2-,1O2, and especially •OH), which enabled the key mechanism for pollutant degradation. In addition, CuS nanosheets exhibited good stability during the degradation of 4-CP, with low metal-ion leakage and a broad pH range applicability, and the degradation rate was hardly affected by laser power, catalyst concentration, and the presence of metal ions. These results demonstrate the strong potential of the photothermal-enhanced Fenton-like effect in pollutant degradation and propose a promising strategy for environmental remediation with the effective utilization of solar energy.