Abstract Photocatalytic degradation of chrysene in polluted seawater was successfully achieved under illumination of natural sunlight using carbon modified titanium oxide (C-TiO2) nanoparticles. The morphological and structural characteristics of the as-synthesized nanoparticles were investigated by X-ray diffraction (XRD), UV–Vis spectra, scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS). The characterization results confirmed the successful incorporation of carbon into C-TiO2 nanoparticles. As a result of C-modification, a significant enhancement of the photocatalytic degradation efficiency was observed for C-TiO2, compared with pure TiO2. In order to optimize the operating parameters, the impacts of catalyst loading and pH on the photocatalytic degradation of chrysene were investigated. The best degradation rate was obtained at pH 3 and C-TiO2 loading of 1.0 g L−1. The photodegradation of chrysene in seawater by using C-TiO2 was found to follow a pseudo first-order kinetics in terms of the Langmuir-Hinshelwood model.

中文翻译：

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在碳修饰的 n-TiO 2 纳米粒子存在下太阳光诱导海水中屈的光降解

摘要 使用碳修饰的二氧化钛 (C-TiO2) 纳米粒子在自然阳光的照射下成功地实现了污染海水中屈光催化降解。通过 X 射线衍射 (XRD)、紫外-可见光谱、扫描电子显微镜 (SEM)、能量色散 X 射线光谱 (EDS)、傅里叶变换红外 (FT- IR) 和 X 射线光电子能谱 (XPS)。表征结果证实了碳成功地结合到 C-TiO2 纳米粒子中。作为 C 修饰的结果，与纯 TiO2 相比，C-TiO2 的光催化降解效率显着提高。为了优化运行参数，研究了催化剂负载量和pH值对光催化降解苝的影响。在 pH 值为 3 和 C-TiO2 负载量为 1.0 g L-1 时获得最佳降解速率。根据 Langmuir-Hinshelwood 模型，发现使用 C-TiO2 在海水中光降解 chrysene 遵循伪一级动力学。