Abstract Copper oxide (CuO, 10–90 wt%) was loaded onto carbon nanotubes (CNTs) by electrosynthesis method. The catalysts (CuO/CNT) were characterized by XRD, nitrogen adsorption–desorption, ESR, FTIR, Raman, and XPS spectroscopy. The results indicated that a lower amount of CuO was dispersed well on the CNT, while higher loading was agglomerated, producing large-size crystallites, hence resulting in lower specific surface area. Adsorption studies revealed that the isotherms are fitted well with the Langmuir model. Moreover, the n value that was obtained from Freundlich model indicated that adsorption process is chemisorption. Photodegradation of p-chloroaniline (PCA) under visible light irradiation demonstrated that the 50 wt% CuO/CNT catalyst gave the highest degradation (97%). It was concluded that C N moieties of PCA were chemisorbed on the catalyst prior to photodegradation, while the Cu O C bonds, surface defects and oxygen vacancies were the main active site in enhancing the subsequent photodegradation. The kinetics of photodegradation were correlated with pseudo-first-order model, verifying the surface reaction was the controlling step. Remarkable mineralization results of PCA were attained by TOC (89.1%) and BOD5 (50.7%). It was also evidenced that the catalyst has a good potential toward degradation of various endocrine disruption compounds.

中文翻译：

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指导 CuO-CNT 催化剂中 CNT 的数量以增强对氯苯胺的吸附定向可见光响应光降解

摘要 通过电合成方法将氧化铜（CuO，10-90 wt%）负载到碳纳米管（CNTs）上。通过XRD、氮吸附-解吸、ESR、FTIR、拉曼和XPS光谱对催化剂（CuO/CNT）进行表征。结果表明，较少量的 CuO 在 CNT 上分散良好，而较高的负载量则团聚，产生大尺寸的微晶，从而导致较低的比表面积。吸附研究表明等温线与朗缪尔模型非常吻合。此外，从 Freundlich 模型获得的 n 值表明吸附过程是化学吸附。在可见光照射下对氯苯胺 (PCA) 的光降解表明，50 wt% CuO/CNT 催化剂的降解率最高 (97%)。得出的结论是，PCA 的 CN 部分在光降解之前化学吸附在催化剂上，而 Cu OC 键、表面缺陷和氧空位是增强后续光降解的主要活性位点。光降解动力学与准一级模型相关，验证表面反应是控制步骤。TOC（89.1%）和BOD5（50.7%）获得了PCA显着的矿化结果。还证明该催化剂具有降解各种内分泌干扰化合物的良好潜力。验证表面反应是控制步骤。TOC（89.1%）和BOD5（50.7%）获得了PCA显着的矿化结果。还证明该催化剂具有降解各种内分泌干扰化合物的良好潜力。验证表面反应是控制步骤。TOC（89.1%）和BOD5（50.7%）获得了PCA显着的矿化结果。还证明该催化剂具有降解各种内分泌干扰化合物的良好潜力。