A novel quadripartite Cu₂O-CdS-BiVO₄-WO₃ nanocomposite (NC) was prepared by mechanical mixing of the individual semiconductor nanoparticles (NPs). The work focused on the kinetic study of the photodegradation and photo mineralization processes of sulfasalazine (SZ) by the quadripartite NC. XRD patterns showed the cubic phase of CdS and WO₃ crystals, the monoclinic BiVO₄, and the hexagonal CdS crystals in the composite, which relatively also confirmed by SEM and TEM images. The average crystallite sizes of about 28 nm and 22.5 nm were obtained for the NC by the Scherrer and Williamson-Hall equations, respectively. Photoluminescence (PL) spectra showed the lowest intensity for the composite. Both the lowest PL intensity and the highest photocatalytic activity were achieved when the moles of Cu₂O in the composite was 3 times greater than the other components. Diffuse reflectance spectroscopy (DRS) results also showed a relative enhancement in the band gap energy of the composite especially for WO₃ NPs alone. The photodegraded SZ solutions were subjected to the COD experiment to estimate the mineralization extent of SZ molecules or its degradation intermediates. Kinetic of both processes obeyed the Hinshelwood kinetic model and the rate constants of 0.0265 min⁻¹ (t_1/2 of 26.2 min) and 0.0323 min⁻¹ (t_1/2 of 21.5 min) were respectively obtained for the photodegradation and mineralization processes of SZ molecules, confirming that the mineralization of SZ is about 1.23 times faster than its photodegradation extent.

通过机械混合各个半导体纳米颗粒（NPs），制备了新颖的四方Cu ₂ O-CdS-BiVO ₄ -WO ₃纳米复合材料（NC）。这项工作的重点是四方NC对柳氮磺胺吡啶（SZ）的光降解和光矿化过程的动力学研究。X射线衍射图谱显示CdS和WO ₃晶体为立方相，即单斜晶BiVO ₄，以及复合物中的六方CdS晶体，这也可以通过SEM和TEM图像得到确认。对于NC，分别通过Scherrer和Williamson-Hall方程获得约28nm和22.5nm的平均微晶尺寸。光致发光（PL）光谱显示复合材料的最低强度。当复合物中Cu ₂ O的摩尔数比其他组分大3倍时，最低的PL强度和最高的光催化活性都达到了。漫反射光谱法（DRS）的结果还表明，复合材料的带隙能量相对增加，尤其是对于WO ₃仅NP。将光降解的SZ溶液进行COD实验，以估算SZ分子或其降解中间体的矿化程度。这两个过程的动力学均遵循Hinshelwood动力学模型，并且光降解和矿化过程的速率常数分别为0.0265 min ^-1（_t6.2为26.2 min）和0.0323 min ^-1（t _1/2为21.5 min）。的SZ分子，证实SZ的矿化速度比其光降解程度快约1.23倍。