Department of Chemistry, Shahreza Branch, Islamic Azad University, P. O. Box 311-86145, Shahreza, Islamic Republic of Iran.
Department of Chemistry, Firoozabad Branch, Islamic Azad University, Firoozabad, Islamic Republic of Iran.
Environ Sci Pollut Res Int. 2023 Mar;30(12):33725-33736. doi: 10.1007/s11356-022-24613-1. Epub 2022 Dec 10.
Increased water pollution due to discharging industrial/urban/hospital wastewater has been adopted to introduce/develop novel removal techniques/catalyst/adsorbent. The hexagonal (wurtzite) CdS and the cubic PbS nanoparticles (NPs) were synthesized, coupled, and supported onto clinoptilolite NPs (CNP). Then, the sample was characterized by X-ray powder diffraction (XRD), diffuse reflectance spectroscopy (DRS), Fourier transform infrared (FTIR), and a scanning electron microscope equipped with an energy dispersive X-ray analyzer (SEM-EDX) techniques. The average crystallite size for CdS NPs, PbS NPs, CNP, and CdS-PbS/CNP samples was obtained at about 24, 36, 27, and 14 nm using the Scherrer formula value of nanometer, by the W-H formula, 31, 17, 39, and 51, respectively. Only a detectable slope can be observed from the DRS spectra for CdS NPs at 591 nm corresponding to an Eg value of 2.1 eV. PbS NPs have a broad abruption peak that begins from the visible region and extends to the IR region of the light. A boosted photocatalytic activity of the supported binary catalysts towards cefotaxime (CT) was reached. An apparent first kinetic model was reached with a k-value of 0.021 min corresponding to the t value of 33 min. A decreased COD trend for the photodegraded CT solutions was reached, and the chemical oxygen demand (COD) results in the Hinshelwood model showed a k-value of 0.016 min, corresponding to a t value of 43 min.
由于排放工业/城市/医院废水，水污染加剧，因此采用了新型去除技术/催化剂/吸附剂。合成了六方（纤锌矿）CdS 和立方 PbS 纳米粒子（NPs），并将它们偶联并负载到斜发沸石 NPs（CNP）上。然后，通过 X 射线粉末衍射（XRD）、漫反射光谱（DRS）、傅里叶变换红外（FTIR）和带有能量色散 X 射线分析仪（SEM-EDX）的扫描电子显微镜对样品进行了表征。使用纳米级的谢勒公式值、W-H 公式、31、17、39 和 51，分别获得了 CdS NPs、PbS NPs、CNP 和 CdS-PbS/CNP 样品的平均晶粒尺寸约为 24、36、27 和 14nm。仅在 CdS NPs 的 DRS 光谱中可以观察到一个可检测的斜率，对应于 2.1eV 的 Eg 值。PbS NPs 具有一个从可见光区域开始并延伸到光的 IR 区域的宽突跃峰。负载二元催化剂对头孢噻肟（CT）的光催化活性得到了提高。达到了表观一级动力学模型，k 值为 0.021 min，对应于 t 值为 33 min。达到了光降解 CT 溶液中 COD 下降的趋势，并且在 Hinshelwood 模型中的化学需氧量（COD）结果表明 k 值为 0.016 min，对应于 t 值为 43 min。
