A new photocatalyst CuO/Bi oxide nitrate hydroxide hydrate (C-BONH) has been synthesized by hydrothermal method. The obtained product has been characterized using x-rays diffraction (XRD), fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The surface area has been measured by Brunauer-Emmett-Teller (BET) method, and it has been found 4.42 m² g^–1. The photocatalytic activity has been evaluated by removal of reactive blue 19 (RB 19) dye, where total decolorization has been achieved in less than 15 minutes. The photocatalytic process is described with four kinetic models (Langmuir‒Hinshelwood model, pseudo-first order kinetic model, pseudo-second order kinetic model and Chrastil diffusion model). Langmuir‒Hinshelwood kinetic model and pseudo-first order kinetic model the best describe the photocatalytic process. Chrastil diffusion model has been shown that diffusion has not any influence on the process. The chemical oxygen demand (COD) has been decreased from 28.1 to 6.82 mg dm^–3within 180 minusing UV light (254 nm wavelength). It has been observed that photocatalyst retained its stability and activity even after five cycles, which could significantly reduce the operation cost in practical applications.

中文翻译：

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CuO / Bi氧化物硝酸氢氧化物水合物粉末的紫外光催化应用

通过水热法合成了一种新型的光催化剂CuO / Bi氧化物硝酸氢氧化物水合物（C-BONH）。使用X射线衍射（XRD），傅立叶变换红外光谱（FTIR），扫描电子显微镜（SEM）和能量色散X射线光谱（EDS）对所得产物进行表征。表面积已通过Brunauer-Emmett-Teller（BET）方法测量，发现为4.42 m ² g ^–1。通过去除反应性蓝19（RB 19）染料评估了光催化活性，该染料在不到15分钟的时间内即可完全脱色。用四个动力学模型（Langmuir‒Hinshelwood模型，拟一级动力学模型，拟二级动力学模型和Chrastil扩散模型）描述了光催化过程。Langmuir‒Hinshelwood动力学模型和拟一级动力学模型最能描述光催化过程。Chrastil扩散模型表明扩散对过程没有任何影响。化学需氧量（COD）从28.1降至6.82 mg dm ^–3在180分钟内使用紫外线（254 nm波长）。已经观察到光催化剂甚至在五个循环之后仍保持其稳定性和活性，这可以显着降低实际应用中的操作成本。